Integrated ink quantity and flow self-adjusting ink box

Abstract

The invention relates to the technical field of ink-jet printers, in particular to an integrated ink quantity and flow self-adjusting ink box. The box body is composed of an ink inlet bin used for containing ink, a spray head used for spraying out the ink in the ink inlet bin and an ink return bin used for recovering waste ink of the spray head, the ink box cover is used for sealing the internal space of the box body, the ink inlet air pipe connector is used for enabling the ink inlet bin to be communicated with a corresponding pipeline, and the ink return air pipe connector is used for enabling the ink return bin to be communicated with a corresponding pipeline. The detection mechanism is used for detecting the ink jet amount output by the spray head, the board card is used for determining whether the ink box runs in accordance with the standard or not and determining the reason for inconformity and generating a corresponding processing instruction, and the adjusting mechanism is used for controlling the flow of ink conveyed to the spray head from the ink inlet bin. The control module is used for adjusting operation parameters of corresponding parts to corresponding values based on processing instructions output by the board card, the temperature sensor is used for detecting the temperature of ink conveyed to the spray head from the ink inlet bin, the liquid level floating ball is used for monitoring the height of the ink in the ink inlet bin in real time, and the printing quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printers, and in particular to an integrated ink volume flow self-regulating ink cartridge. Background Art

[0002] In the technical field of inkjet printers, traditional ink cartridges are devices for storing and transporting ink, and are composed of two parts: an ink inlet cartridge and an ink return cartridge. When in use, the ink in the inlet cartridge is supplied to the surface of paper through a pipe and a nozzle, thereby forming the required text or image and completing printing. In the prior art, in order to ensure that the document output by the inkjet printer can meet the printing requirements, it is usually necessary to adjust the flow rate of the ink output by the inkjet printer.

[0003] Chinese Patent Publication No.: CN208469327U discloses an ink cartridge with adjustable flow rate, including a box body, a box cover, an air pressure balance valve, and a regulating valve. The box cover is arranged above the box body, a handle is arranged at one end of the box body, a circuit board is arranged at the other end of the box body, and contacts are arranged on the circuit board. A first clamping block and a second clamping block are arranged at one end of the box cover close to the handle, a guide block is arranged at one end of the box cover close to the circuit board, ink is arranged in the box body, a nozzle and a liquid level switch are arranged at the bottom of the box body, a filter is arranged above the nozzle, and the regulating valve is arranged above the filter.

[0004] It can be seen that the above scheme detects and feeds back the flow rate of ink through the flow meter above the nozzle, and intelligently controls the flow rate of ink through the regulating valve according to the printing situation, thereby adjusting the ink flow and improving the printing accuracy. However, during the adjustment process, especially when printing documents with high-precision requirements, the flow meter and regulating valve structure cannot achieve a high degree of matching between operating parameters and precision requirements based on real-time monitoring and intelligent identification of the nozzle inkjet volume, which reduces the printing quality of the printer. Summary of the invention

[0005] To this end, the present invention provides an integrated ink flow self-regulating ink cartridge to overcome the problem of low printing quality caused by the inability to achieve a high degree of matching of operating parameters with precision requirements based on real-time monitoring and intelligent identification of nozzle ink jetting volume in the prior art.

[0006] To achieve the above object, the present invention provides an integrated ink flow self-regulating ink cartridge, comprising:

[0007] The box body includes an ink inlet tank for loading ink, a nozzle for spraying ink in the ink inlet tank, and an ink return tank for recovering waste ink from the nozzle; the box body is also provided with an ink box cover for closing the inner space of the box body, and the ink box cover is provided with an ink inlet air pipe joint for connecting the ink inlet tank with a corresponding pipeline and an ink return air pipe joint for connecting the ink return tank with a corresponding pipeline;

[0008] A detection mechanism, which is arranged at the nozzle of the nozzle and is used to detect the amount of ink ejected by the nozzle;

[0009] A board connected to the detection mechanism, used to determine whether the operation of the ink cartridge meets the standard based on the acquired ink ejection amount, and to determine the reason why the operation of the ink cartridge does not meet the standard based on the historical ink ejection amount; the board is also used to generate a corresponding processing instruction according to the determined reason;

[0010] An adjusting mechanism, which is located at the bottom of the box body and is arranged at the connection between the ink inlet bin and the nozzle, and is used to control the flow rate of ink delivered from the ink inlet bin to the nozzle;

[0011] A control module, which is connected to the board, the detection mechanism and the adjustment mechanism respectively, and is used to adjust the operating parameters of the corresponding components to corresponding values ​​based on the processing instructions output by the board;

[0012] A temperature sensor, which is arranged at the connection between the ink inlet bin and the regulating mechanism, and is used to detect the temperature of the ink delivered from the ink inlet bin to the nozzle;

[0013] A liquid level float is located in the ink inlet bin and is used to monitor the height of the ink in the ink inlet bin in real time.

[0014] Furthermore, the board card is used to receive the ink ejection volume of the nozzle in a single detection cycle measured by the detection mechanism, and to determine whether the operation of the ink cartridge meets the standards based on the comparison result of the ink ejection volume and the preset ink ejection volume pre-stored in the board card; the board card is also used to determine the reason why the operation of the ink cartridge does not meet the standards in the current cycle based on the historical ink ejection volume in the historical detection cycles it has obtained when it is determined that the operation of the ink cartridge does not meet the standards.

[0015] Furthermore, the board is also used to generate a corresponding processing method based on the determined reason why the operation of the ink cartridge in a single detection cycle does not meet the standards, including: re-adjusting the opening of the regulating mechanism based on the ink spray volume difference when the opening of the regulating mechanism does not meet the preset standard, determining the ink return air pressure at the ink return air pipe joint based on the obtained variance difference when there is waste ink in the nozzle, and determining the ink inlet air pressure at the ink inlet air pipe joint based on the height of the liquid level float when the ink loading amount in the ink inlet tank does not meet the preset standard.

[0016] Furthermore, the regulating mechanism is an electromagnetic valve, and the board is also used to increase the opening value of the regulating mechanism based on the obtained inkjet volume difference, and the increase in the opening value is proportional to the inkjet volume difference, wherein the inkjet volume difference is the difference between the preset inkjet volume and the inkjet volume measured by the detection mechanism.

[0017] Furthermore, the board card is also used to correct the opening value of the regulating mechanism after adjustment based on the height of the liquid level float, and the correction amplitude of the opening value is inversely proportional to the height of the liquid level float.

[0018] Furthermore, the board is also used to increase the ink return air pressure at the ink return air pipe joint based on the obtained variance difference, and the increase in the ink return air pressure is inversely proportional to the variance difference, wherein the variance difference is the difference between the measured variance and the first preset variance.

[0019] Furthermore, the board card is also used to increase the ink inlet air pressure at the ink inlet air pipe joint based on the height of the liquid level float, and the increase in the ink inlet air pressure is inversely proportional to the height of the liquid level float.

[0020] Furthermore, a smooth area is provided in the ink inlet bin, and the liquid level float is arranged in the smooth area.

[0021] Furthermore, a primary liquid level mark and a secondary liquid level mark are provided in the smooth area to cooperate with the liquid level float to determine the content of ink in the ink inlet bin.

[0022] Furthermore, the ink cartridge cover is provided with a through hole at the top of the smooth area, a liquid level pressure cover is provided at the through hole, and a restraining rod is provided at the bottom of the liquid level pressure cover; the liquid level float is sleeved on the restraining rod and can move along the direction of the restraining rod.

[0023] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention is provided with a board and a detection mechanism, and by using the board to determine whether the operation of the ink cartridge meets the standard based on the ink spray volume measured by the detection mechanism, the real-time monitoring effect and intelligent recognition capability of the nozzle ink spray volume are effectively improved, thereby completing a high degree of matching of operating parameters and accuracy requirements, and effectively improving the printing quality of the printer using the ink cartridge of the present invention. At the same time, the board can also determine the reason why the ink cartridge operation does not meet the standard based on the historical ink spray volume, analyze the reason why the ink cartridge operation does not meet the standard, and further improve the operating parameters of the corresponding components in the ink cartridge based on the determined reason, while further improving the intelligent recognition capability of the nozzle ink spray volume, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0024] Furthermore, the board card provided in the present invention is also used to generate corresponding processing instructions according to the determined cause, and timely adjust the operating status of the corresponding components that cause the cause, to ensure the effective resolution of the ink cartridge operation problem, while further completing the high degree of matching of operating parameters and precision requirements, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0025] Furthermore, the present invention further improves the printing quality of the printer using the ink cartridge of the present invention by providing an adjustment mechanism at the bottom of the cartridge body and at the connection between the ink inlet and the nozzle, and controlling the flow of ink delivered from the ink inlet to the nozzle through external components.

[0026] Furthermore, the present invention sets a control module to transmit corresponding instructions to corresponding components, so that each component operates with corresponding parameters to ensure that the nozzle outputs ink at a corresponding flow rate, so that the ink flow rate matches the required printing effect, further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0027] Furthermore, the present invention provides a temperature sensor at the connection between the ink inlet and the adjustment mechanism to detect the temperature of the ink delivered to the nozzle during printing, thereby maintaining the ink within a certain temperature range so that the ink has optimal fluidity. This further improves the printing quality of the printer using the ink cartridge of the present invention and effectively extends the service life of the printer using the ink cartridge of the present invention.

[0028] Furthermore, the present invention arranges a liquid level float in the ink inlet bin to monitor the height of the ink in the ink inlet bin in real time. The liquid level float will rise or sink accordingly with the increase or decrease of the height of the ink in the ink inlet bin. When the height of the ink in the ink inlet bin is too high or too low, the liquid level float will promptly issue an alarm to remind the user to deal with it in time to ensure that the height of the ink in the ink inlet bin is always maintained at an appropriate level, thereby effectively avoiding the situation where there is too little or too much ink in the ink inlet bin of the ink cartridge resulting in the inability to print. While further improving the printing quality of the printer using the ink cartridge described in the present invention, the use efficiency of the printer using the ink cartridge described in the present invention is effectively guaranteed.

[0029] Furthermore, the present invention provides an ink cartridge cover on the ink cartridge to prevent the external environment from polluting the ink in the cartridge body, thereby maintaining a good storage environment for the ink, facilitating the delivery of higher quality ink from the ink tank to the nozzle, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0030] Furthermore, the present invention is provided with an ink inlet air pipe joint for connecting the ink inlet tank with the corresponding pipeline and an ink return air pipe joint for connecting the ink return tank with the corresponding pipeline on the ink cartridge cover. The ink inlet air pipe joint is used for conveying gas to the ink inlet tank to increase the air pressure in the ink inlet tank, thereby ensuring that the ink in the ink inlet tank can be stably conveyed to the nozzle. At the same time, the ink return air pipe joint is used for extracting gas in the ink return tank to put the ink return tank in a low-pressure state, thereby ensuring that waste ink from the nozzle is recovered to the ink return tank, thereby avoiding the accumulation of waste ink on the nozzle affecting the amount of ink sprayed by the nozzle, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0031] Furthermore, the present invention combines the ink inlet tank and the ink return tank into one, improving the current situation that traditional ink cartridges are usually composed of two components, thereby optimizing the number of components of the ink cartridge and reducing the space occupied by the ink cartridge in the printer, thereby effectively reducing the production cost of the ink cartridge described in the present invention.

[0032] Furthermore, the board card provided in the present invention is used to receive the ink spraying volume of the nozzle measured by the detection mechanism in a single detection cycle, so as to monitor the ink spraying volume of the nozzle in real time, and determine whether the operation of the ink cartridge meets the standards based on the intelligent recognition comparison result of the ink spraying volume and the preset ink spraying volume pre-stored in the board card, while further improving the intelligent recognition ability of the nozzle ink spraying volume, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0033] Furthermore, the board provided in the present invention is also used to intelligently identify the reason why the operation of the ink cartridge in a single detection cycle does not meet the standards based on the variance of each historical ink ejection amount in a preset number of historical detection cycles. The variance of each historical ink ejection amount in the preset number of historical detection cycles reflects its degree of discreteness. The reasons why the operation of the ink cartridge does not meet the standards are different, and their variances are different. Therefore, based on the variance, the reason why the operation in a single detection cycle does not meet the standards can be determined. While further improving the intelligent recognition capability of the nozzle ink ejection amount, the printing quality of the printer using the ink cartridge described in the present invention is further improved.

[0034] Furthermore, the regulating mechanism provided in the present invention is a two-way solenoid valve, which controls the flow of ink delivered from the ink inlet tank to the nozzle through electromagnetic force. The control of the electromagnetic force used is excellent, and it can achieve efficient regulation of the ink flow while responding quickly, further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0035] Furthermore, the board card provided in the present invention is also used to analyze the accuracy requirements based on the obtained ink jet volume difference to determine the opening value of the adjustment mechanism and adjust the corresponding operating parameters. The ink jet volume difference is the difference between the measured ink jet volume and the preset ink jet volume. Adjusting the opening value of the adjustment mechanism can change the ink jet volume of the nozzle, while further achieving a high degree of matching between the operating parameters and the accuracy requirements, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0036] Furthermore, the board card provided in the present invention is also used to correct the opening of the adjusted regulating mechanism to a corresponding value based on the height of the liquid level float. The height of the ink affects the ink spraying amount of the nozzle. The height of the liquid level float will rise or sink accordingly with the rise or fall of the ink in the ink inlet tank. Therefore, the opening value of the adjusted regulating mechanism can be further corrected based on the height of the liquid level float. While further completing the high degree of matching of the operating parameters and the precision requirements, the printing quality of the printer using the ink cartridge described in the present invention is further improved.

[0037] Furthermore, the board card provided in the present invention is also used to determine the ink return air pressure at the ink return air pipe joint based on the obtained variance difference value, the variance difference value is the difference between the measured variance and the first preset variance, the variance difference value can reflect the difference between the measured variance under a single detection state and the first preset variance, that is, the difference between the discrete degree and the preset discrete degree, and the accumulation degree of waste ink in the nozzle can be determined according to the difference, and the recovery of waste ink in the nozzle can be achieved by adjusting the ink return air pressure, thereby effectively avoiding the influence of the accumulation of waste ink in the nozzle on the inkjet process, while further completing the high degree of matching of operating parameters and precision requirements, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0038] Furthermore, the board card provided in the present invention is also used to determine the ink inlet air pressure at the ink inlet air pipe joint based on the height of the liquid level float. The height of the liquid level float will rise or sink accordingly with the rise or fall of the ink in the ink inlet tank. The ink inlet air pipe joint can adjust the air pressure in the ink inlet tank, thereby adjusting the ink height and ensuring that the inkjet volume reaches a preset level. While further completing the high degree of matching of operating parameters and precision requirements, the printing quality of the printer using the ink cartridge described in the present invention is further improved.

[0039] Furthermore, the present invention provides a smooth area in the ink inlet bin, and the liquid level float is located in the smooth area. The smooth area enables the liquid level float to move more smoothly, thereby improving the detection accuracy of the liquid level. There are primary liquid level marks and secondary liquid level marks in the smooth area to cooperate with the liquid level float to determine the content of ink in the ink inlet bin. The two liquid levels can improve the monitoring sensitivity of the ink height, ensuring that the ink in the ink inlet bin is maintained within an appropriate range, while further improving the printing quality of the printer using the ink cartridge of the present invention, and further ensuring the use efficiency of the printer using the ink cartridge of the present invention.

[0040] Furthermore, the present invention has a through hole at the top of the ink cartridge cover located in the smooth area, a liquid level pressure cover is arranged at the through hole, a constraint rod is arranged at the bottom of the liquid level pressure cover, and the liquid level float is sleeved on the constraint rod and can move along the direction of the constraint rod, which is beneficial for the liquid level float to move along the corresponding trajectory when rising or sinking in the ink inlet bin, avoiding the situation that the liquid level height cannot be clearly identified due to the movement of the liquid level float, while further improving the printing quality of the printer using the ink cartridge described in the present invention, further ensuring the use efficiency of the printer using the ink cartridge described in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a right side cross-sectional view of an integrated ink flow self-regulating ink cartridge according to an embodiment of the present invention;

[0042] Figure 2 It is a front cross-sectional view of an integrated ink flow self-regulating ink cartridge according to an embodiment of the present invention;

[0043] Figure 3 This is a connection diagram of an integrated ink flow self-regulating ink cartridge module according to an embodiment of the present invention;

[0044] Figure 4 The present invention is a flowchart of the integrated ink flow self-regulating ink cartridge board according to an embodiment of the present invention.

[0045] In the figure: 1. Liquid level pressure cover; 2. Ink cartridge cover; 3. Liquid level float; 4. Adjustment mechanism; 5. Temperature sensor; 6. Ink inlet air pipe joint; 7. Ink inlet tank; 8. Ink inlet port; 9. Ink return air pipe joint; 10. Ink return tank; 11. Ink return port; 12. Box body; 13. Nozzle; 14. Smoothing area; 15. Restraint rod; 16. Primary liquid level mark; 17. Secondary liquid level mark; 18. Sealing ring; 19. Detection mechanism. DETAILED DESCRIPTION

[0046] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] See also Figure 1 As shown, it is a right-side cross-sectional view of the integrated ink flow self-regulating ink cartridge of the present invention, and the integrated ink flow self-regulating ink cartridge of the present invention comprises a box body 12, a nozzle 13, a detection mechanism 19, an adjustment mechanism 4 and a control module (not shown in the figure); wherein, the box body 12 is used to store ink, and the nozzle 13 is arranged at the output end of the box body 12, for receiving the ink output by the box body 12 and spraying it out; the detection mechanism 19 is arranged at the nozzle of the nozzle 13, for detecting the amount of ink sprayed output by the nozzle 13; the adjustment mechanism 4 is arranged at the connection between the bottom of the box body 12 and the nozzle 13, for controlling the flow rate of ink delivered from the box body 12 to the nozzle 13; the control module is respectively connected to the detection mechanism 19 and the adjustment mechanism 4, for sending instructions to the corresponding components to adjust the operating parameters of each component to the corresponding values.

[0051] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the control module sends instructions to the corresponding components, and each component adjusts the corresponding operating parameters to the corresponding values ​​according to the received instructions to complete the control of the ink flow output by the box body 12. At this time, the box body 12 delivers ink to the nozzle 13 at a corresponding flow rate, and the nozzle 13 sprays the ink after receiving the ink to complete the printing of the document.

[0052] The present invention sets the detection mechanism 19 at the nozzle of the nozzle 13 to detect the amount of ink ejected by the nozzle 13. By real-time monitoring of the amount of ink ejected at the nozzle 13, it can effectively ensure that the nozzle 13 ejects ink according to the corresponding standard, thereby effectively improving the printing quality of the printer using the ink cartridge of the present invention.

[0053] The present invention sets a control module to transmit corresponding instructions to corresponding components, so that each component operates with corresponding parameters to ensure that the nozzle 13 outputs ink at a corresponding flow rate, thereby ensuring that the adjustment mechanism 4 can accurately control the flow rate of ink transmitted from the box body 12 to the nozzle 13, so that the ink flow rate better matches the required printing effect, further improving the printing quality of the printer using the ink cartridge of the present invention.

[0054] Please continue reading Figure 1 As shown, the box body 12 of the present invention is provided with an ink cartridge cover 2 for closing the inner space of the box body 12 , and a sealing ring 18 is provided on one side of the ink cartridge cover 2 close to the box body 12 for better sealing of the box body 12 .

[0055] The present invention can prevent the external environment from polluting the ink in the box body 12 by setting the ink cartridge cover 2 on the box body 12 to seal the box body 12, thereby maintaining a good storage environment for the ink. Furthermore, the sealing ring 18 is set on the side of the ink cartridge cover 2 close to the box body 12. The setting of the sealing ring 18 makes the ink cartridge cover 2 and the box body 12 more closely fit, achieving a better sealing effect on the ink cartridge, further preventing the external environment from polluting the ink in the box body 12, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0056] Specifically, the box body 12 is made of aluminum metal, and the formed oxide film can prevent the box body 12 from reacting with the ink.

[0057] The box body 12 described in the present invention is made of aluminum metal. The aluminum metal will oxidize on the surface of the box body 12 and form an oxide film. The formed oxide film can prevent the box body 12 from chemically reacting with the ink, and has a protective effect on the box body 12 itself and the ink in the box body 12, thereby effectively ensuring the quality of the ink delivered by the box body 12 to the nozzle 13, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0058] Specifically, the box body 12 is made by a black oxidation process, and the oxide layer further formed on the surface of the box body 12 can further prevent the box body 12 from chemically reacting with the ink.

[0059] The box body 12 described in the present invention is prepared by a black oxidation process, so that an oxide layer is further formed on the oxide layer surface of the box body 12. The further formed oxide layer surface can further prevent the box body 12 from chemically reacting with the ink, thereby protecting the ink in the box body 12 and avoiding corrosion of the box body 12 due to the chemical reaction, so that the box body 12 has good durability and stability, thereby further ensuring the quality of the ink delivered from the box body 12 to the nozzle 13, and further improving the printing quality of the printer using the ink cartridge described in the present invention.

[0060] See also Figure 2 As shown, it is a front view cross-sectional view of an integrated ink flow self-regulating ink cartridge according to an embodiment of the present invention, wherein the box body 12 of the integrated ink flow self-regulating ink cartridge according to the present invention comprises an ink inlet tank 7, an ink inlet port 8, an ink inlet air pipe joint 6, an ink return tank 10, an ink return port 11 and an ink return air pipe joint 9; wherein, the ink inlet tank 7 is opened in the box body 12 for loading ink, the ink inlet port 8 is opened on the side wall of the ink inlet tank 7 for replenishing external ink into the ink inlet tank 7, the ink inlet air pipe joint 6 is opened on the top of the ink inlet tank 7 for conveying gas into the ink inlet tank 7; the ink return tank 10 is opened in the box body 12 for storing waste ink, the ink return port 11 is opened at the bottom of the ink return tank 10 for conveying waste ink at the nozzle 13 to the ink return tank 10, and the ink return air pipe joint 9 is opened on the top of the ink return tank 10 for extracting gas from the ink return tank 10.

[0061] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the ink inlet air pipe joint 6 supplies air to the ink inlet tank 7 to increase the pressure, so that the ink inlet tank 7 delivers ink to the nozzle 13 and the ink is sprayed out from the nozzle 13; the ink return air pipe joint 9 deflates and reduces the pressure in the ink return tank 10, so that the waste ink generated at the nozzle 13 can flow into the ink return tank 10 through the ink return port 11; when the ink inlet tank 7 needs to be replenished with ink, the ink inlet port 8 can replenish external ink into the ink inlet tank 7.

[0062] The present invention improves the current situation that traditional ink cartridges are usually composed of two components by combining the ink inlet tank 7 and the ink return tank 10 into one, thereby optimizing the number of components of the ink cartridge and reducing the space occupied by the ink cartridge in the printer, thereby effectively reducing the production cost of the ink cartridge of the present invention.

[0063] The present invention opens the ink inlet 8 on the side wall of the ink inlet bin 7. When the ink in the ink inlet bin 7 needs to be replenished, external ink can be input into the ink inlet bin 7 through the ink inlet 8, thereby effectively ensuring the delivery of the ink in the ink inlet bin 7 to the nozzle 13; the ink return port 11 is opened at the bottom of the ink return bin 10, which is conducive to timely and effectively delivering the waste ink generated at the nozzle 13 to the ink return bin 10, ensuring that the waste ink of the nozzle 13 is recovered to the ink return bin 10, avoiding the accumulation of waste ink on the nozzle affecting the ink spraying amount of the nozzle, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0064] The present invention is provided with an ink inlet air pipe joint 6 for connecting the ink inlet tank 7 with the corresponding pipeline and an ink return air pipe joint 9 for connecting the ink return tank 10 with the corresponding pipeline on the ink cartridge cover 2. The ink inlet air pipe joint 6 is used to transport gas to the ink inlet tank 7 to increase the air pressure in the ink inlet tank 7, thereby ensuring that the ink in the ink inlet tank 7 can be stably transported to the nozzle 13. At the same time, the ink return air pipe joint 9 is used to extract the gas in the ink return tank 10 to make the ink return tank 10 in a low-pressure state, thereby ensuring that the waste ink of the nozzle 13 is recovered to the ink return tank 10, thereby avoiding the accumulation of waste ink on the nozzle affecting the amount of ink sprayed by the nozzle, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0065] See also Figure 1 and Figure 2 As shown, the ink inlet tank 7 of the integrated ink flow self-regulating ink cartridge of the present invention includes a temperature sensor 5, a smooth area 14, a liquid level pressure cover 1, a constraint rod 15 and a liquid level float 3; wherein the temperature sensor 5 is arranged at the connection between the ink inlet tank 7 and the regulating mechanism 4, so as to detect the temperature of the ink delivered from the ink inlet tank 7 to the nozzle 13; the liquid level pressure cover 1 is arranged at a through hole opened at the top of the smooth area 14 of the ink cartridge cover 2, so as to prevent external dust from entering the box body 12; the constraint rod 15 is located at the bottom of the liquid level pressure cover 1 and the liquid level float 3 is sleeved on the constraint rod 15, so as to constrain the liquid level float 3.

[0066] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the liquid level float 3 in the smooth area 14 will monitor the height of the ink in the ink inlet tank 7. When the height of the ink in the ink inlet tank 7 rises or falls, the liquid level float 3 will rise or sink accordingly along the direction of the constraint rod 15. When the height of the ink is too high or too low, the liquid level float 3 will move to the corresponding position along the constraint rod 15, convert the acquired height position into a corresponding electrical signal, and transmit the electrical signal to the display module (not shown) to send out an alarm.

[0067] The present invention arranges the temperature sensor 5 at the connection between the ink inlet bin 7 and the regulating mechanism 4, so as to detect the temperature of the ink delivered to the nozzle 13 during printing, thereby keeping the ink within a certain temperature range so that the ink has optimal fluidity, further improving the printing quality of the printer using the ink cartridge of the present invention, and effectively extending the service life of the printer using the ink cartridge of the present invention.

[0068] The present invention sets the smooth area 14 in the ink inlet bin 7, and the liquid level float 3 is located in the smooth area 14. The smooth area 14 allows the liquid level float 3 to move more smoothly, thereby improving the detection accuracy of the liquid level. While further improving the printing quality of the printer using the ink cartridge of the present invention, it effectively ensures the use efficiency of the printer using the ink cartridge of the present invention.

[0069] The liquid level float 3 described in the present invention can monitor the height of the ink in the ink inlet bin 7 in real time. The liquid level float 3 will rise or sink accordingly as the height of the ink in the ink inlet bin 7 rises or falls. When the height of the ink in the ink inlet bin 7 is too high or too low, the liquid level float 3 will promptly issue an alarm to remind the user to deal with it in time to ensure that the height of the ink in the ink inlet bin 7 is always maintained at an appropriate level, effectively avoiding the situation where there is too little or too much ink in the ink inlet bin 7 resulting in the inability to print. While further improving the printing quality of the printer using the ink cartridge described in the present invention, the use efficiency of the printer using the ink cartridge described in the present invention is further guaranteed.

[0070] The present invention opens a through hole at the top of the ink cartridge cover 2 located in the smooth area 14, arranges the liquid level pressure cover 1 at the through hole, and arranges the constraint rod 15 at the bottom of the liquid level pressure cover 1, so that the liquid level float 3 can be sleeved on the constraint rod 15 and can move along the direction of the constraint rod 15, which is beneficial for the liquid level float 3 to move along the corresponding trajectory when rising or sinking in the ink inlet bin 7, avoiding the situation that the liquid level height cannot be clearly identified due to the movement of the float, while further improving the printing quality of the printer using the ink cartridge of the present invention, and further ensuring the use efficiency of the printer using the ink cartridge of the present invention.

[0071] Please continue reading Figure 1 and Figure 2 As shown, the smooth area 14 of the integrated ink flow self-regulating ink cartridge of the present invention includes a primary liquid level mark 16 and a secondary liquid level mark 17; wherein, the primary liquid level mark 16 is located on the side wall of the smooth area 14 to indicate that the ink height in the ink inlet tank 7 is too low, and the secondary liquid level mark 17 is arranged on the side wall of the smooth area 14 and is located above the primary liquid level mark 16 to indicate that the ink height in the ink inlet tank 7 is too high.

[0072] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, when the liquid level float 3 moves along the direction of the constraint rod 15 to below the primary liquid level mark 16, an alarm signal indicating that the ink level is too low will be issued; when the liquid level float 3 moves along the direction of the constraint rod 15 to above the secondary liquid level mark 17, an alarm signal indicating that the ink level is too high will be issued.

[0073] In the present invention, the smooth area 14 in the ink inlet bin 7 has the primary liquid level mark 16 and the secondary liquid level mark 17, which are used to cooperate with the liquid level float 3 to determine the height of the ink in the ink inlet bin 7. The two liquid levels can improve the monitoring sensitivity of the ink height, ensure that the height of the ink in the ink inlet bin 7 is maintained in an appropriate range, and further improve the printing quality of the printer using the ink cartridge of the present invention while further ensuring the use efficiency of the printer using the ink cartridge of the present invention.

[0074] See also Figure 3 As shown, it is a connection diagram of the integrated ink flow self-regulating ink cartridge module according to an embodiment of the present invention. The ink cartridge according to the present invention is also provided with a board card (not shown in the figure), which is connected to the detection mechanism 19 and the control module. The board card can obtain the ink spraying volume measured by the detection mechanism 19 and output processing instructions to the control module.

[0075] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the board card can perform intelligent identification and comparison based on the ink ejection volume obtained by the detection mechanism 19 and the preset ink ejection volume to determine whether the operation of the ink cartridge meets the standards, and at the same time, determine the reason why the operation of the ink cartridge does not meet the standards based on the historical ink ejection volume; the board card is also used to generate corresponding processing instructions according to the determined reasons to adjust the operating parameters of the corresponding components to corresponding values ​​through the control module.

[0076] The board card of the present invention can determine whether the operation of the ink cartridge meets the standard based on the ink jet volume measured by the detection mechanism, effectively improving the real-time monitoring effect and intelligent identification ability of the nozzle ink jet volume, thereby completing the high matching of the operating parameters and the precision requirements, and further improving the printing quality of the printer using the ink cartridge of the present invention. At the same time, the board card can also determine the reason why the ink cartridge operation does not meet the standard based on the historical ink jet volume, analyze the reason why the ink cartridge operation does not meet the standard, and further improve the operating parameters of the corresponding components in the ink cartridge based on the determined reasons, while further improving the intelligent identification ability of the nozzle ink jet volume, and further improving the printing quality of the printer using the ink cartridge of the present invention. Further, the board card set in the present invention is also used to generate corresponding processing instructions according to the determined reasons, and timely adjust the operating status of the corresponding components that generate the reasons, to ensure the effective solution of the ink cartridge operation problem, while further completing the high matching of the operating parameters and the precision requirements, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0077] See also Figure 4 As shown, it is a working flow chart of the integrated ink flow self-regulating ink cartridge board card of the embodiment of the present invention. When the integrated ink flow self-regulating ink cartridge of the present invention is running, the board card is used to receive the ink ejection volume of the nozzle 13 in a single detection cycle measured by the detection mechanism 19, and determine whether the operation of the ink cartridge meets the standard based on the comparison result of the ink ejection volume and the preset ink ejection volume pre-stored in the board card; wherein, the preset ink ejection volume Q0 is set to 3.2ml / s:

[0078] If the ink ejection amount is greater than or equal to the preset ink ejection amount Q0, the board determines that the operation of the ink cartridge meets the standard;

[0079] If the ink ejection amount is less than the preset ink ejection amount Q0, the board card determines that the operation of the ink cartridge does not meet the standard, and the board card determines the reason why the operation of the ink cartridge does not meet the standard in the current cycle based on the historical ink ejection amount in the historical detection cycle it has obtained.

[0080] The board card of the present invention is used to receive the ink spraying volume of the nozzle 13 in a single detection cycle measured by the detection mechanism, so as to monitor the ink spraying volume of the nozzle 13 in real time, and determine whether the operation of the ink cartridge meets the standards based on the intelligent recognition comparison result of the ink spraying volume and the preset ink spraying volume pre-stored in the board card, while further improving the intelligent recognition ability of the nozzle ink spraying volume, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0081] Please continue reading Figure 4As shown, when the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the board is also used to determine the reason why the operation of the ink cartridge in a single detection cycle does not meet the standard based on the variance of each historical ink ejection amount in a preset number of historical detection cycles, and generate a corresponding processing method based on the determined reason why the operation of the ink cartridge in a single detection cycle does not meet the standard, wherein:

[0082] If the variance is less than or equal to the first preset variance C1 set in the board card, the board card determines that the reason why the ink cartridge does not meet the mark is that the opening of the adjustment mechanism 4 does not meet the standard, and the board card re-determines the opening of the adjustment mechanism 4 based on the ink ejection amount, wherein the first preset variance C1 in this embodiment is 0.12;

[0083] If the variance is greater than the first preset variance C1 and less than or equal to the second preset variance C2 set in the board, the board determines that the reason why the ink cartridge does not meet the standard is that there is waste ink in the nozzle 13, and the board determines the ink return air pressure at the ink return air pipe joint 9 based on the obtained variance value, wherein the second preset variance C2 in this embodiment is 0.23;

[0084] If the variance is greater than the second preset variance C2, the board card determines that the reason why the ink cartridge operation does not comply with the marking is that the ink loading amount in the ink inlet tank 7 is lower than the preset standard, and the board card determines the ink inlet air pressure at the ink inlet air pipe joint 6 based on the height of the liquid level float 3.

[0085] The board card of the present invention is also used to intelligently identify the reason why the operation of the ink cartridge in a single detection cycle does not meet the standards based on the variance of each historical ink ejection amount in a preset number of historical detection cycles. The variance of each historical ink ejection amount in the preset number of historical detection cycles reflects its discreteness. The reasons why the operation of the ink cartridge does not meet the standards are different, and their variances are different. Therefore, based on the variance, the reason why the operation in a single detection cycle does not meet the standards can be determined. While further improving the intelligent recognition capability of the nozzle ink ejection amount, the printing quality of the printer using the ink cartridge of the present invention is further improved.

[0086] Please continue reading Figure 4 As shown, when the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the regulating mechanism 4 is a solenoid valve, and the board is also used to increase the opening value of the regulating mechanism 4 based on the obtained ink jetting amount difference, and the increase in the opening value is proportional to the ink jetting amount difference, wherein the ink jetting amount difference is the difference between the preset ink jetting amount and the ink jetting amount measured by the detection mechanism 19:

[0087] If the ink jetting amount difference is greater than the second preset ink jetting amount difference △Q2 set in the board, the board determines to adjust the opening value of the regulating mechanism 4 to 1.65 times the initial opening, wherein the second preset ink jetting amount difference △Q2 in this embodiment is 1.5 ml / s;

[0088] If the ink jetting amount difference is less than or equal to the second preset ink jetting amount difference △Q2 and greater than the first preset ink jetting amount difference △Q1 set in the board, the board determines to adjust the opening value of the adjustment mechanism 4 to 1.33 times the initial opening, wherein the first preset ink jetting amount difference △Q1 in this embodiment is 0.9 ml / s;

[0089] If the ink ejection amount difference is less than or equal to the first preset ink ejection amount difference ΔQ1, the board determines to adjust the opening value of the regulating mechanism 4 to 1.16 times the initial opening.

[0090] The regulating mechanism 4 of the present invention is a two-way solenoid valve, which controls the flow rate of ink delivered to the nozzle by the ink inlet tank 7 through electromagnetic force. The control of the electromagnetic force used is excellent, and it can achieve efficient regulation of the ink flow rate while responding quickly, further improving the printing quality of the printer using the ink cartridge of the present invention. It can be understood that the regulating mechanism 4 of the present invention can be a two-way solenoid valve, or other types of structures controlled by electromagnetic force, as long as it can ensure that the regulating mechanism 4 can complete the precise control of the ink flow rate in the output pipeline of the box body 12.

[0091] The board card of the present invention is also used to analyze the accuracy requirements based on the obtained ink jet volume difference to determine the opening value of the adjustment mechanism 4, and adjust the corresponding operating parameters. The ink jet volume difference is the difference between the measured ink jet volume and the preset ink jet volume. Adjusting the opening value of the adjustment mechanism 4 can change the ink jet volume of the nozzle, while further completing the high degree of matching of the operating parameters and the accuracy requirements, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0092] Please continue reading Figure 4 As shown, when the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the board is also used to correct the opening value of the regulating mechanism 4 after adjustment based on the height of the liquid level float 3, and the correction amplitude of the opening value is inversely proportional to the height of the liquid level float 3:

[0093] If the height of the liquid level float 3 is greater than the second preset height H2 set in the board, the board determines to correct the opening value of the adjustment mechanism 4 to 1.03 times the adjusted opening value, wherein the second preset height H2 in this embodiment is 160 mm;

[0094] If the height of the liquid level float 3 is less than or equal to the second preset height H2 and greater than the first preset height H1 set in the board, the board determines to correct the opening value of the adjustment mechanism 4 to 1.12 times the adjusted opening value, wherein the first preset height H1 in this embodiment is 90 mm;

[0095] If the height of the liquid level float 3 is less than or equal to the first preset height H1, the board card determines to correct the opening value of the regulating mechanism 4 to 1.24 times the adjusted opening value.

[0096] The board card of the present invention is also used to correct the opening of the adjusting mechanism 4 after adjustment to a corresponding value based on the height of the liquid level float 3. The height of the ink affects the ink spraying amount of the nozzle 13. The height of the liquid level float 3 will rise or sink accordingly with the rise or fall of the ink in the ink inlet tank 7. Therefore, the opening value of the adjusting mechanism 4 after adjustment can be further corrected based on the height of the liquid level float 3. While further completing the high degree of matching of the operating parameters and the precision requirements, the printing quality of the printer using the ink cartridge of the present invention is further improved.

[0097] Please continue reading Figure 4 As shown, when the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the board is also used to increase the ink return air pressure at the ink return air pipe joint 9 based on the obtained variance difference, and the increase amplitude of the ink return air pressure is inversely proportional to the variance difference, wherein the variance difference is the difference between the measured variance and the first preset variance:

[0098] When the integrated ink flow self-regulating ink cartridge of the present invention is running, if the variance difference is greater than the second preset variance difference △C2 set in the board, the board determines to adjust the ink return air pressure at the ink return air pipe joint 9 to 1.22 times the initial ink return air pressure, wherein the second preset variance difference △C2 of this embodiment is 0.08;

[0099] If the variance difference is less than or equal to the second preset variance difference △C2 and greater than the first preset ink ejection amount difference △C1 set in the board, the board determines to adjust the ink return air pressure at the ink return air pipe joint 9 to 1.41 times the initial ink return air pressure, wherein the first preset ink ejection amount difference △C1 in this embodiment is 0.05;

[0100] If the variance difference is less than or equal to the first preset variance difference ΔC1, the board determines to adjust the ink return air pressure at the ink return air pipe joint 9 to 1.68 times the initial ink return air pressure.

[0101] The board card of the present invention is also used to determine the ink return air pressure at the ink return air pipe joint 9 based on the obtained variance difference value, the variance difference value is the difference between the measured variance and the first preset variance, the variance difference value can reflect the difference between the measured variance under a single detection state and the first preset variance, that is, the difference between the discrete degree and the preset discrete degree, and the accumulation degree of the waste ink of the nozzle 13 can be determined according to the difference, and the recovery of the waste ink of the nozzle 13 can be achieved by adjusting the ink return air pressure, thereby effectively avoiding the influence of the accumulation of the waste ink of the nozzle 13 on the inkjet process, while further completing the high degree of matching of the operating parameters and the accuracy requirements, and further improving the printing quality of the printer using the ink cartridge of the present invention.

[0102] Please continue reading Figure 4 As shown, when the integrated ink flow self-regulating ink cartridge of the present invention is in operation, the board card is also used to increase the ink inlet pressure at the ink inlet air pipe joint 6 based on the height of the liquid level float 3, and the increase in the ink inlet pressure is inversely proportional to the height of the liquid level float 3. ：

[0103] When the integrated ink flow self-regulating ink cartridge of the present invention is in operation, if the height of the liquid level float 3 is greater than the second preset height H2 set in the board, the board determines to adjust the ink inlet pressure at the ink inlet air pipe joint 6 to 1.22 times the initial ink inlet pressure;

[0104] If the height of the liquid level float 3 is less than or equal to the second preset height H2 and greater than the first preset height H1 set in the board, the board determines to adjust the ink inlet pressure at the ink inlet air pipe joint 6 to 1.41 times the initial ink inlet pressure;

[0105] If the height of the liquid level float 3 is less than or equal to the first preset height H1, the board card determines to adjust the ink inlet pressure at the ink inlet air pipe joint 6 to 1.68 times the initial ink inlet pressure.

[0106] The board card of the present invention is also used to determine the ink inlet air pressure at the ink inlet air pipe joint 6 based on the height of the liquid level float 3. The height of the liquid level float 3 will rise or sink accordingly with the rise or fall of the ink in the ink inlet tank. The ink inlet air pipe joint 6 can adjust the air pressure in the ink inlet tank to achieve the adjustment of the ink height and ensure that the inkjet volume reaches a preset level. While further completing the high degree of matching of operating parameters and precision requirements, the printing quality of the printer using the ink cartridge of the present invention is further improved.

[0107] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0108] 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. An integrated ink flow self-regulating ink cartridge, characterized in that: include: The box body includes an ink inlet tank for loading ink, a nozzle for spraying ink in the ink inlet tank, and an ink return tank for recovering waste ink from the nozzle; the box body is also provided with an ink box cover for closing the inner space of the box body, and the ink box cover is provided with an ink inlet air pipe joint for connecting the ink inlet tank with a corresponding pipeline and an ink return air pipe joint for connecting the ink return tank with a corresponding pipeline; A detection mechanism, which is arranged at the nozzle of the nozzle and is used to detect the amount of ink ejected by the nozzle; A board connected to the detection mechanism, used to determine whether the operation of the ink cartridge meets the standard based on the acquired ink ejection amount, and to determine the reason why the operation of the ink cartridge does not meet the standard based on the historical ink ejection amount; the board is also used to generate a corresponding processing instruction according to the determined reason; An adjusting mechanism, which is located at the bottom of the box body and is arranged at the connection between the ink inlet bin and the nozzle, and is used to control the flow rate of ink delivered from the ink inlet bin to the nozzle; A control module, which is connected to the board, the detection mechanism and the adjustment mechanism respectively, and is used to adjust the operating parameters of the corresponding components to corresponding values ​​based on the processing instructions output by the board; A temperature sensor, which is arranged at the connection between the ink inlet bin and the regulating mechanism, and is used to detect the temperature of the ink delivered from the ink inlet bin to the nozzle; A liquid level float is located in the ink inlet bin and is used to monitor the height of the ink in the ink inlet bin in real time.

2. The integrated ink flow self-regulating ink cartridge according to claim 1, characterized in that: The board card is used to receive the ink ejection volume of the nozzle in a single detection cycle measured by the detection mechanism, and to determine whether the operation of the ink cartridge meets the standards based on the comparison result of the ink ejection volume and the preset ink ejection volume pre-stored in the board card; the board card is also used to determine the reason why the operation of the ink cartridge does not meet the standards in the current cycle based on the historical ink ejection volume in the historical detection cycles it has obtained when it is determined that the operation of the ink cartridge does not meet the standards.

3. The integrated ink flow self-regulating ink cartridge according to claim 2, characterized in that: The board is also used to generate a corresponding processing method based on the determined reason that the operation of the ink cartridge in a single detection cycle does not meet the standards, including: re-adjusting the opening of the regulating mechanism based on the ink injection volume difference when the opening of the regulating mechanism does not meet the preset standards, determining the ink return air pressure at the ink return air pipe joint based on the obtained variance difference when there is waste ink in the nozzle, and determining the ink inlet air pressure at the ink inlet air pipe joint based on the height of the liquid level float when the ink loading amount in the ink inlet tank does not meet the preset standards.

4. The integrated ink flow self-regulating ink cartridge according to claim 3, characterized in that: The regulating mechanism is an electromagnetic valve, and the board is also used to increase the opening value of the regulating mechanism based on the obtained inkjet volume difference, and the increase in the opening value is proportional to the inkjet volume difference, wherein the inkjet volume difference is the difference between the preset inkjet volume and the inkjet volume measured by the detection mechanism.

5. The integrated ink flow self-regulating ink cartridge according to claim 4, characterized in that: The board is also used to correct the opening value of the regulating mechanism after adjustment based on the height of the liquid level float, and the correction amplitude of the opening value is inversely proportional to the height of the liquid level float.

6. The integrated ink flow self-regulating ink cartridge according to claim 3, characterized in that: The board is also used to increase the ink return air pressure at the ink return air pipe joint based on the obtained variance difference, and the increase in the ink return air pressure is inversely proportional to the variance difference, wherein the variance difference is the difference between the measured variance and the first preset variance.

7. The integrated ink flow self-regulating ink cartridge according to claim 3, characterized in that: The board card is also used to increase the ink inlet air pressure at the ink inlet air pipe joint based on the height of the liquid level float, and the increase in the ink inlet air pressure is inversely proportional to the height of the liquid level float.

8. The integrated ink flow self-regulating ink cartridge according to claim 1, characterized in that: A smooth area is provided in the ink inlet bin, and the liquid level float is arranged in the smooth area.

9. The integrated ink flow self-regulating ink cartridge according to claim 8, characterized in that: A primary liquid level mark and a secondary liquid level mark are provided in the smooth area, and are used to cooperate with the liquid level float to determine the content of ink in the ink inlet bin.

10. The integrated ink flow self-regulating ink cartridge according to claim 1, characterized in that: The ink cartridge cover is provided with a through hole at the top of the smooth area, a liquid level pressure cover is provided at the through hole, and a restraining rod is provided at the bottom of the liquid level pressure cover; the liquid level float is sleeved on the restraining rod and can move along the direction of the restraining rod.

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