Inkjet printing apparatus

Abstract

The utility model discloses ink-jet printing equipment, which relates to the technical field of printing equipment and comprises a printing platform, a printing head, a heating module and a control circuit. The printing head is arranged above the printing platform and can move relative to the printing platform; the heating module is arranged on the printing platform so as to heat the printing medium on the printing platform; the heating module comprises a temperature detection circuit, a medium detection circuit, a heating piece and a switching circuit; the temperature detection circuit is used for detecting the temperature of the heating piece and outputting a corresponding temperature signal, the medium detection circuit is used for outputting a material feeding signal when a printing medium exists on the printing platform, the heating piece is used for generating heat, and the switching circuit is connected with the heating piece; and the control circuit is used for controlling the on-off of the switching circuit based on the temperature signal and the feed signal. The ink-jet printing equipment provided by the utility model has higher printing quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of printing equipment, especially a kind of ink-jet printing equipment. BACKGROUND

[0002] The consumables used by ink-jet printing equipment include ink and printing medium, and when in humid environment or long-term non-use, printing medium is prone to damp, since printing medium will affect the final product quality of ink-jet printing in humid condition, therefore, the existing ink-jet printing equipment has the problem of low printing quality. SUMMARY

[0003] The main purpose of the utility model is to provide an ink-jet printing equipment, to improve the printing quality of ink-jet printing equipment.

[0004] In order to achieve the above purpose, the utility model provides an ink-jet printing equipment, the ink-jet printing equipment includes:

[0005] Printing platform;

[0006] Print head, set in the upper of printing platform, and can be relative printing platform moves;

[0007] Heating module, set in the printing platform, to heat the printing medium on the printing platform;The heating module includes temperature detection circuit, medium detection circuit, heating piece and switch circuit;The temperature detection circuit is used to detect the temperature of the heating piece and output corresponding temperature signal, the medium detection circuit is used to output material signal when there is printing medium on the printing platform, the heating piece is used to generate heat, and the switch circuit is connected with the heating piece, for controlling the power on-off of the heating piece;

[0008] Control circuit, the control circuit connects the temperature detection circuit, the medium detection circuit and the switch circuit, and the control circuit is used to control the on-off of the switch circuit based on the temperature signal and the material signal.

[0009] In an embodiment, the printing platform has an entry end, and the heating module is arranged at the entry end;

[0010] The medium detection circuit is arranged at the entry end, and is used to output the material signal when detecting that there is printing medium at the entry end, and the control circuit is used to control the on-off of the switch circuit based on the temperature signal and the material signal, to control the power on-off of the heating piece.

[0011] In an embodiment, the printing platform has an entry end and an exit end, the number of the heating module is at least two, and the entry end and the exit end are respectively provided with at least one heating module.

[0012] The medium detection circuits are at least two, one of which is arranged at the inlet end and the other of which is arranged at the outlet end. The medium detection circuit arranged at the inlet end is configured to output the feeding signal when detecting that the printing medium exists at the inlet end. The medium detection circuit arranged at the outlet end is configured to output the feeding signal when detecting that the printing medium exists at the outlet end.

[0013] The control circuit is configured to control the on-off of the switching circuit of the corresponding heating module based on the temperature signal and the feeding signal output by the heating module.

[0014] In an embodiment, the heating member includes a metal heating plate and a wire loop arranged outside the metal heating plate. The wire loop has a winding area on the metal heating plate, and the winding area defines a drying area. The wire loop is connected to the switching circuit, and the heating member heats the printing medium through the drying area.

[0015] In an embodiment, the temperature detection circuit further includes a temperature sensor arranged on the metal heating plate. The temperature sensor is configured to detect the temperature of the metal heating plate and output the corresponding temperature signal.

[0016] In an embodiment, the switching circuit includes a first resistor, a second resistor, and a first switch tube.

[0017] The control circuit is connected to one end of the second resistor and the controlled end of the first switch tube through the first resistor. The other end of the second resistor is connected to the power supply and the first end of the first switch tube. The second end of the first switch tube is connected to the heating member.

[0018] In an embodiment, the inkjet printing device further includes a driving circuit connected in series between the switching circuit and the control circuit. The control circuit is configured to control the driving circuit based on the temperature signal and the feeding signal, so that the driving circuit drives the on-off of the switching circuit.

[0019] In an embodiment, the driving circuit includes a third resistor, a fourth resistor, and a second switch tube.

[0020] One end of the third resistor is connected to the control circuit, and the other end of the third resistor is connected to one end of the fourth resistor and the controlled end of the second switch tube. The other end of the fourth resistor and the first end of the second switch tube are common. The second end of the second switch tube is connected to the controlled end of the switching circuit. The control circuit is configured to control the on-off of the second switch tube to control the on-off of the switching circuit.

[0021] In an embodiment, the medium detection circuit comprises an infrared detection circuit, the infrared detection circuit comprises a signal sending end and a signal receiving end, the signal sending end is used for emitting infrared light to the printing platform, the signal receiving end is used for receiving infrared light signals after the infrared light is reflected, and the infrared detection circuit outputs the feeding signal when the printing platform has the printing medium based on the infrared light signals.

[0022] In an embodiment, the infrared detection circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, an infrared photoelectric transceiver sensor and a comparator.

[0023] The infrared photoelectric transceiver sensor has a first end, a second end, a third end and a fourth end, the first end of the infrared photoelectric transceiver sensor is grounded, the second end of the infrared photoelectric transceiver sensor is connected to a power supply through the fifth resistor, the third end of the infrared photoelectric transceiver sensor is connected to a first input end of the comparator and one end of the sixth resistor, the other end of the sixth resistor is connected to the power supply, and the fourth end of the infrared photoelectric transceiver sensor is grounded.

[0024] The second input end of the comparator is connected to one end of the seventh resistor, one end of the eighth resistor and one end of the ninth resistor, the other end of the seventh resistor is grounded, the other end of the eighth resistor is connected to the power supply, and the other end of the ninth resistor is connected to an output end of the comparator and the control circuit.

[0025] The utility model provides a kind of ink-jet printing equipment, with higher printing quality.Wherein, the ink-jet printing equipment includes heating module, when medium detection circuit detects medium, output feeding signal;Then, temperature detection circuit detects the temperature of heating piece, and outputs corresponding temperature signal, to judge whether the temperature of current heating piece reaches ideal range suitable for heating printing medium;Finally, control circuit is comprehensively judged according to feeding signal and temperature signal, if medium exists and temperature is insufficient, then control switch circuit opens, so that heating piece starts to work, and printing medium is heated;Conversely, if temperature has reached requirement or no medium exists, then control switch circuit is closed, and heating is stopped.So, interface ensures printing medium to print in suitable state, to effectively improve printing quality. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in these drawings without creative labor.

[0027] Figure 1 The schematic view of the first embodiment of the inkjet printing equipment provided by the utility model;

[0028] Figure 2 The schematic view of one embodiment of the heating module setting position provided by the utility model;

[0029] Figure 3 The schematic view of one embodiment of the heating module provided by the utility model;

[0030] Figure 4 The circuit diagram of one embodiment of the switching circuit and the driving circuit provided by the utility model;

[0031] Figure 5 The schematic view of the second embodiment of the inkjet printing equipment provided by the utility model;

[0032] Figure 6 The circuit diagram of one embodiment of the switching circuit, the driving circuit and the temperature detection circuit provided by the utility model;

[0033] Figure 7 The circuit diagram of one embodiment of the medium detection circuit provided by the utility model;

[0034] Figure 8 The flow chart of one control embodiment of the temperature detection circuit provided by the utility model.

[0035] Explanation of the attached drawings:

[0036] 10, inkjet printing equipment; 100, printing platform; 110, inlet end; 120, outlet end; 200, printing head; 300, heating module; 310, temperature detection circuit; 311, temperature sensor; 320, medium detection circuit; 321, infrared detection circuit; 330, heating piece; 331, metal heating plate; 332, winding loop; 340, switching circuit; 400, control circuit; 500, driving circuit;

[0037] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; R10, tenth resistor; S1, infrared photoelectric transceiver sensor; Q1, first switch tube; Q2, second switch tube; U1, comparator; C1, first capacitor; C2, second capacitor; F1, first fuse.

[0038] The utility model aims at realizing, function characteristics and advantages, which will be further explained by combining with embodiments and referring to the attached drawings. Specific implementation

[0039] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0040] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0042] The inkjet printing device is a common printing device, and the inkjet printing device of the present application can be a thermal inkjet printer, a piezoelectric inkjet printer, a white ink ironing printing printer (“Direct to Film”, DTF printer), a white ink direct printing printer (“Direct to Garment”, DTG printer), etc., as long as it is a device used for printing operation by ejecting ink. In the inkjet printing device, the printing medium is used as the basic material for carrying the pattern. The printing medium can be a PET film, paper, etc.

[0043] However, the use of printing media under certain environmental conditions presents challenges, especially when the printing media is exposed to a humid environment or left unused for a long time, it is prone to moisture absorption and moisture absorption, the presence of moisture will directly affect the binding ability between ink and printing media, resulting in uneven distribution of ink or diffusion phenomenon, which seriously affects the printing quality. Specifically, the humid printing medium can cause the printed pattern to be blurred, distorted in color, or even missing parts of the pattern. Therefore, in order to overcome these problems, existing inkjet printing equipment and technology need to be improved to improve the printing quality and stability under adverse environmental conditions.

[0044] As Figure 1 To solve the problem of moisture absorption of printing media in inkjet printing equipment, the utility model provides an inkjet printing equipment 10, which comprises a printing platform 100, a print head 200, a heating module 300 and a control circuit 400. The control circuit 400 is used for controlling the heating module 300 to heat the printing medium on the printing platform 100, so as to avoid the influence of the moisture of the printing medium on the final printing quality.

[0045] In this embodiment, the printing platform 100 is a workbench in the inkjet printing equipment 10, which is used for accommodating and processing the printing medium and provides a stable support surface for the printing medium, ensuring that the medium does not shift or deform during printing, thereby improving the accuracy of printing. The print head 200 performs printing work on the printing medium on the printing platform 100.

[0046] In this embodiment, the print head 200 is arranged above the printing platform 100 and can move relative to the printing platform 100. In this way, the print head 200 can accurately spray ink on the printing medium according to the predetermined path, achieving high-quality printing effect.

[0047] In this embodiment, the heating module 300 is arranged on the printing platform 100 to heat the printing medium on the printing platform 100. It should be noted that the heating module 300 can be used for preheating the printing medium placed on the printing platform 100, and the heating module 300 can also be used for drying the printing medium after printing. The purpose is to reduce the printing quality problems caused by environmental humidity, such as color diffusion and poor ink adhesion.

[0048] Optionally, the heating module 300 comprises a temperature detection circuit 310, a medium detection circuit 320, a heating element 330 and a switch circuit 340; the temperature detection circuit 310 is configured to detect the temperature of the heating element 330 and output a corresponding temperature signal, the medium detection circuit 320 is configured to output a medium signal when there is a printing medium on the printing platform 100, the heating element 330 is configured to generate heat, and the switch circuit 340 is connected with the heating element 330 and configured to control the power supply of the heating element 330.

[0049] The temperature detection circuit 310 is configured to detect the temperature of the heating element 330 and convert the temperature information of the heating element 330 into a corresponding temperature signal. In this way, the heating element 330 can work in an ideal temperature range, which can effectively remove the moisture in the printing medium without overheating and damaging the medium or affecting the printing quality. Similarly, the temperature detection circuit 310 can also detect the temperature of the heating element 330 during the heating process of the heating element 330, so as to avoid insufficient heating and effectively remove the moisture in the printing medium. This not only improves the resource utilization efficiency, but also avoids unnecessary energy consumption. In addition, the heating element 330 is directly used to generate heat, which converts electrical energy into heat energy to heat the printing medium. The switch circuit 340 is connected with the heating element 330 and decides whether to supply power to the heating element 330 according to the received control instruction.

[0050] It should be noted that the temperature detection circuit 310 can detect the temperature in real time or detect the temperature every 10 seconds. The specific detection interval is not limited here and can depend on the actual application requirements.

[0051] In some embodiments, the control circuit 400 is connected with the temperature detection circuit 310, the medium detection circuit 320 and the switch circuit 340, and the control circuit 400 is configured to control the on-off of the switch circuit 340 based on the temperature signal and the medium signal.

[0052] Understandably, the control circuit 400 is used to control the heating module 300. In one feasible embodiment, the control circuit 400 receives signals from the temperature detection circuit 310 and the media detection circuit 320, and makes decisions based on this information to control the on / off state of the switching circuit 340. First, when the media detection circuit 320 confirms that there is media to be printed on the printing platform 100, it sends a material signal to the control circuit 400. At this time, the control circuit 400 begins to analyze the temperature signal provided by the temperature detection circuit 310 and evaluates the current operating state of the heating element 330. If the detected temperature is below the ideal range, the control circuit 400 commands the switching circuit 340 to close, so that the heating element 330 receives power and begins heating. Conversely, if the temperature has reached or exceeded the required standard, or if no printing media is detected, the control circuit 400 instructs the switching circuit 340 to open, stopping the heating process.

[0053] It should be noted that the control circuit 400 must not only ensure that the heating module 300 can be accurately activated when needed, but also ensure the stability of the entire heating process. For example, when processing different types and sizes of printing media, the control circuit 400 can automatically adjust the heating time and temperature according to preset parameters to adapt to the requirements of various materials.

[0054] Optionally, the control circuit 400 also has self-diagnostic capabilities, enabling it to identify potential problems and take measures to resolve them, such as automatically cutting off the power supply when the temperature rises abnormally, thus protecting the equipment from damage.

[0055] In one feasible embodiment, such as Figure 8 As shown, firstly, the control circuit 400 sets a target heating temperature T1 and activates the heating function of the aluminum substrate. Then, the temperature detection circuit 310 detects the actual temperature T0 of the metal heating plate 331 every certain time interval (e.g., X milliseconds) and feeds this data back to the control circuit 400. The control circuit 400 determines whether to continue heating based on the comparison between T0 and T1: if the actual temperature T0 is lower than or equal to the target temperature T1, the heating element 330 is kept heating; once T0 exceeds T1, the control circuit 400 issues a command to stop the heating element 330 from heating.

[0056] In conclusion, the utility model provides a kind of ink-jet printing equipment 10, with higher printing quality.Wherein, the ink-jet printing equipment 10 includes heating module 300, when medium detection circuit 320 detects that medium exists, output to material signal;Then, temperature detection circuit 310 detects the temperature of heating piece 330, and exports corresponding temperature signal, to judge whether the temperature of current heating piece 330 reaches the ideal range suitable for heating printing medium;Finally, control circuit 400 is comprehensively judged according to material signal and temperature signal, if medium exists and temperature is insufficient, then control switch circuit 340 opens, and heating piece 330 starts to work, and printing medium is heated;Conversely, if temperature has reached the requirement or no medium exists, then control switch circuit 340 is closed, and heating is stopped.So, interface ensures that printing medium is printed in suitable state, to effectively improve printing quality.

[0057] In an embodiment, as shown in Figure 2 The heating module 300 is arranged at the inlet end 110 of the printing platform 100, and the medium detection circuit 320 is arranged at the inlet end 110 for outputting the material signal when detecting the presence of printing medium at the inlet end 110. The control circuit 400 is configured to control the on-off of the switch circuit 340 based on the temperature signal and the material signal, so as to control the power on-off of the heating piece 330.

[0058] In some embodiments, the inlet end 110 of the printing platform 100 is the first contact point of the printing medium entering the printing device and preparing for printing operation. In actual application, the printing medium enters the printing platform 100 through the inlet end 110 and moves along a predetermined path to a printing position. Arranging the heating module 300 at the inlet end 110 can ensure that the printing medium has reached an ideal temperature and humidity state before formally starting printing, thereby significantly improving the printing quality.

[0059] In some embodiments, the medium detection circuit 320 is arranged at the inlet end 110 of the printing platform 100 for outputting the material signal when detecting the presence of printing medium at the inlet end 110. In this way, when the printing medium reaches the inlet end 110, the medium detection circuit 320 responds and outputs the material signal to the control circuit 400, while the temperature detection circuit 310 continuously monitors the state of the heating piece 330 and feeds back the temperature signal to the control circuit 400. Based on this information, the control circuit 400 can make accurate judgments to decide whether to turn on or off the switch circuit 340, thereby controlling the power on-off of the heating piece 330. In this way, the problem of printing quality caused by excessive humidity is avoided, and damage caused by excessive heating is also prevented.

[0060] In an embodiment, as shown in Figure 2As shown, the printing platform 100 has an entry end 110 and an exit end 120, and the number of heating modules 300 is at least two, and the entry end 110 and the exit end 120 are respectively equipped with at least one heating module 300; the number of medium detection circuits 320 is at least two, one is arranged at the entry end 110 and one is arranged at the exit end 120, the medium detection circuit 320 arranged at the entry end 110 is used to output the feeding signal when detecting that the entry end 110 has printing medium; the medium detection circuit 320 arranged at the exit end 120 is used to output the feeding signal when detecting that the exit end 120 has printing medium; the control circuit 400 is used to control the on-off circuit 340 of the corresponding heating module 300 based on the temperature signal and the feeding signal output by each heating module 300.

[0061] It can be understood that the number of heating modules 300 is several, and the number of medium detection circuits 320 is also several. In the case of two heating modules 300, the two heating modules are arranged at the entry end 110 and the exit end 120 respectively, and the medium detection circuits 320 of the two heating modules 300 are respectively used to detect the feeding signal of the entry end 110 and the feeding signal of the exit end 120. Of course, in other cases, the number of heating modules 300 can also be multiple, and multiple heating modules 300 can be arranged at different positions of the printing platform 100 to perform heating and drying work on the printing medium.

[0062] In some embodiments, the printing platform 100 has an entry end 110 and an exit end 120 to realize the automatic feeding and output of the printing medium. The entry end 110 and the exit end 120 are respectively equipped with at least one heating module 300 to ensure that the printing medium can be properly heated before entering the printing area and after leaving the printing area.

[0063] In some embodiments, the inkjet printing device 10 also has a movement mechanism for conveying the printing medium, which transmits the printing medium from the entry end 110 to the printing platform 100 and finally to the exit end 120. Optionally, the movement mechanism is also used to cooperate with the control circuit 400 to dynamically adjust the transportation speed and path to optimize the heating and printing effect. For example, when new printing medium is detected to enter the entry end 110, the movement mechanism will slow down the speed so that the heating module 300 has enough time to preheat the medium; and after printing is completed, the speed will be increased to quickly dry the ink by the heating module 300 of the exit end 120. In this way, the whole operation process is highly automated, which improves the work efficiency and the continuity of production, and also reduces the errors caused by manual intervention. Optionally, the movement mechanism includes a driving motor, which is not limited here.

[0064] In an embodiment, the inkjet printing device 10 further comprises a main controller for controlling the operation of the motion mechanism. In this way, the printing medium can be driven to reciprocate in the passage formed between the entry end 110 and the exit end 120 of the printing platform 100.

[0065] It should be noted that the main controller can also be responsible for coordinating the workflow of various components, and can adjust parameter settings such as speed and temperature according to different printing tasks to achieve the best printing effect.

[0066] Optionally, the control circuit 400 of the inkjet printing device 10 is integrated into the main controller. In this way, the architecture of the system is simplified, the hardware cost and maintenance difficulty are reduced, and the stability and response speed of the system are improved.

[0067] For ease of understanding, the heating module 300 provided at the entry end 110 is a first heating module, which comprises a first medium detection circuit, a first temperature detection circuit, a first heating element, and a first switching circuit. The heating module 300 provided at the exit end 120 is a second heating module, which comprises a second medium detection circuit, a second temperature detection circuit, a second heating element, and a second switching circuit.

[0068] In some embodiments, the first heating element is provided at the entry end of the platform, and is used to dry the printing medium entering the printing platform 100. In this way, it can be ensured that the printing medium entering the ink chamber is in the best state, and problems such as poor adhesion of ink and blurred patterns caused by moisture can be avoided. In this embodiment, the second heating element is provided at the exit end of the platform, and is used to dry the printing medium leaving the printing platform 100 after completing the printing work. In this way, it not only helps to further remove any residual moisture, but also speeds up the solidification process of the ink, ensuring that the pattern is firmly attached to the printing medium. It can be understood that the first heating element and the second heating element can remove the moisture on the printing medium by heating or other drying means.

[0069] In the present embodiment, the first medium detection circuit is configured to detect whether the print medium exists at the entry end 110 of the printing platform 100 and output a signal based on the detection result; the first temperature detection circuit is configured to monitor the working temperature of the first heating member and output a temperature signal based on the actual temperature; the first switch circuit is configured to determine whether to turn on or turn off the power supply of the first heating member based on the signal from the first medium detection circuit and the temperature signal from the first temperature detection circuit. The second medium detection circuit is configured to detect whether the print medium exists at the exit end 120 of the printing platform 100 and output a signal based on the detection result; the second temperature detection circuit is configured to monitor the working temperature of the second heating member and output a temperature signal based on the actual temperature; the second switch circuit is configured to determine whether to turn on or turn off the power supply of the second heating member based on the signal from the second medium detection circuit and the temperature signal from the second temperature detection circuit.

[0070] In an embodiment, as shown in FIG. 3, the heating member 330 includes a metal heating plate 331 and a wire winding loop 332 wound outside the metal heating plate 331. The wire winding area of the wire winding loop 332 on the metal heating plate 331 defines a drying area. The wire winding loop 332 is connected to the switch circuit 340. The heating member 330 heats the print medium through the drying area. Figure 3

[0071] In some embodiments, the metal heating plate 331 can be an aluminum substrate. The high thermal conductivity of the aluminum substrate and the flexible layout of the wire winding loop 332 ensure the temperature control capability and energy utilization capability of the heating member 330, and facilitate integration and installation. Moreover, the aluminum substrate-based heating member 330 not only improves the drying efficiency and quality, but also has the advantages of high durability, low maintenance cost, and strong adaptability, thereby significantly improving the overall printing quality and production efficiency. It should be noted that the use of other materials as the metal heating plate 331 is not limited here. For example, copper is also a commonly used thermal conductive material, which has a higher thermal conductivity coefficient than aluminum and can provide better performance in some application scenarios that require more efficient heat conduction. The specific material of the metal heating plate 331 is not limited here. In other embodiments, the metal heating plate 331 can also be a copper substrate or other metal substrate.

[0072] It can be understood that the wire winding loop 332 is wound outside the metal heating plate 331, and the wire winding area thereof defines a specific drying area. In the drying area, heat is concentrated and released to heat the print medium placed or passing through the drying area. When the current passes through the wire winding loop 332, heat is generated due to the resistance effect, and the metal heating plate 331 forms a drying area to uniformly transmit heat to the print medium.

[0073] ​It should be noted that the size of the metal heating plate 331 in the heating element 330 depends on the actual application requirements. For example, when processing a wider width of printing medium, the metal heating plate 331 needs to be designed longer or wider to ensure that the entire surface of the printing medium is uniformly heated. Similarly, the winding density in the heating element 330 is also adjusted according to the actual application. In areas that are humid all year round, in order to enhance the heating performance and ensure complete removal of moisture, the winding density needs to be set higher, thereby providing stronger heating effect. In addition, for temperature-sensitive application scenarios, a more gentle heating process can be achieved by reducing the winding density, avoiding damage to the printing medium or affecting the printing quality due to overheating. Therefore, the metal heating plate 331 and the wire winding loop 332 that make up the heating element 330 can adapt to a variety of different environmental and process requirements, ensuring efficient and reliable completion of the drying task under various conditions, and ultimately improving the overall quality of inkjet printing.

[0074] In a feasible implementation, the heating module 300 has a plurality of heating modules 300, which are respectively arranged at the inlet end 110 and the outlet end 120 of the printing platform 100, wherein the heating elements 330 in the plurality of heating modules 300 are all designed with a metal heating plate 331 and a wire winding loop 332.

[0075] In an embodiment, as shown in Figure 6 The temperature detection circuit 310 further includes a temperature sensor 311 arranged on the metal heating plate 331, which is used to detect the temperature of the metal heating plate 331 and output the corresponding temperature signal.

[0076] It can be understood that the temperature sensor 311 is installed on the metal heating plate 331, ensuring direct and accurate monitoring of the temperature of the metal heating plate 331. The temperature sensor 311 is used to collect temperature data of the metal heating plate 331 in real time and output these data in the form of a temperature signal to the control circuit 400. The control circuit 400 dynamically adjusts the working state of the heating element 330 according to the received temperature signal to maintain the ideal drying temperature.

[0077] Optionally, as shown in Figure 6 The temperature detection circuit 310 further includes a tenth resistor R10, one end of which is connected to a power supply, the other end of which is connected to one end of the control circuit 400 and the temperature sensor 311, and the other end of the temperature sensor 311 is grounded.

[0078] In an embodiment, as shown in Figure 4As shown, the switch circuit 340 includes a first resistor R1, a second resistor R2 and a first switch Q1; the control circuit 400 is connected to one end of the second resistor R2 and the controlled end of the first switch Q1 through the first resistor R1, the other end of the second resistor R2 is connected to the power supply and the first end of the first switch Q1, and the second end of the first switch Q1 is connected to the heating element 330.

[0079] In some embodiments, as shown in Figure 4 As shown, the switch circuit 340 can further include a first fuse F1, and the second end of the first switch Q1 is connected to the heating element 330 through the first fuse F1.

[0080] It can be understood that, in a feasible implementation, when it is needed to start the heating element 330, the control circuit 400 can output a high-level signal to the gate of the first switch Q1. At this time, the first switch Q1 is turned on, and then the switch circuit 340 is turned on, and the heating element 330 starts heating work.

[0081] In an embodiment, as shown in Figure 4 and Figure 5 As shown, the inkjet printing device 10 further includes a driving circuit 500, which is connected in series between the switch circuit 340 and the control circuit 400, and the control circuit 400 is configured to control the driving circuit 500 based on the temperature signal and the material signal, so that the driving circuit 500 drives the switch circuit 340 to turn on or off.

[0082] It can be understood that the driving circuit 500 receives signals from the control circuit 400 and drives the switch circuit 340 to turn on or off based on the signals. In a complex electronic system, directly sending instructions from the control circuit 400 to a high-power component can introduce interference or cause misoperation. By adding the driving circuit 500, a buffer zone can be established between the control circuit 400 and the switch circuit 340, reducing interference and improving system stability. In this way, the driving circuit 500 can more accurately control the working state of the heating element 330, avoiding potential errors or instability factors caused by direct control.

[0083] In some embodiments, as shown in Figure 4As shown, the driving circuit 500 comprises a third resistor R3, a fourth resistor R4 and a second switch Q2; one end of the third resistor R3 is connected to the control circuit 400, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the controlled end of the second switch Q2, the other end of the fourth resistor R4 and the first end of the second switch Q2 are common, the second end of the second switch Q2 is connected to the controlled end of the switching circuit 340, and the control circuit 400 is used to control the on-off of the second switch Q2 to control the on-off of the switching circuit 340.

[0084] In an embodiment, when it is needed to start the heating element 330, the control circuit 400 can output a high level signal to the gate of the second switch Q2. At this time, the second switch Q2 is turned on, and then outputs a conduction signal to the switching circuit 340, and the switching circuit 340 is turned on, and the heating element 330 starts to work.

[0085] In an embodiment, as shown, Figure 4 in combination with the switching circuit 340 and the driving circuit 500, one end of the third resistor R3 is connected to the control circuit 400, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the controlled end of the second switch Q2, the other end of the fourth resistor R4 and the first end of the second switch Q2 are common, the second end of the second switch Q2 is connected to one end of the second resistor R2 and the controlled end of the first switch Q1 through the first resistor R1, the other end of the second resistor R2 is connected to the power supply, the first end of the first switch Q1 and one end of the first capacitor C1, the other end of the first capacitor C1 is grounded, the second end of the first switch Q1 is connected to one end of the second capacitor C2 and the first heating element and the second heating element through the first fuse F1, and the other end of the second capacitor C2 is grounded. Thus, when it is needed to start the heating element 330, the control circuit 400 can output a high level signal to the gate of the second switch Q2. At this time, the second switch Q2 is turned on, and then outputs a conduction signal to the first switch Q1, so that the first switch Q1 is turned on, and the power supply flows to the heating element 330 through the first switch Q1, and the heating element 330 starts to work.

[0086] Among them, the second switch Q2 and the first switch Q1 can be one of MOSFET, bipolar transistor (BJT), insulated gate bipolar transistor (IGBT), relay or solid state relay, or a combination of two.

[0087] In an embodiment, as shown, Figure 7As shown, the medium detection circuit 320 includes an infrared detection circuit 321, which includes a signal sending end and a signal receiving end. The signal sending end is configured to emit infrared light to the printing platform 100, and the signal receiving end is configured to receive an infrared light signal after the infrared light is reflected. The infrared detection circuit 321 outputs the feeding signal when it is determined that the printing platform 100 has printing medium based on the infrared light signal.

[0088] In some embodiments, as shown in FIG. 4, the infrared detection circuit 321 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, an infrared photoelectric transceiver sensor S1, and a comparator U1. Figure 7 As shown, the infrared detection circuit 321 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, an infrared photoelectric transceiver sensor S1, and a comparator U1. The infrared photoelectric transceiver sensor S1 has a first end, a second end, a third end, and a fourth end. The first end of the infrared photoelectric transceiver sensor S1 is grounded, the second end of the infrared photoelectric transceiver sensor S1 is connected to a power supply through the fifth resistor R5, the third end of the infrared photoelectric transceiver sensor S1 is connected to a first input end of the comparator U1 and one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to a power supply, and the fourth end of the infrared photoelectric transceiver sensor S1 is grounded. A second input end of the comparator U1 is connected to one end of the seventh resistor R7, one end of the eighth resistor R8, and one end of the ninth resistor R9. The other end of the seventh resistor R7 is grounded, the other end of the eighth resistor R8 is connected to a power supply, the other end of the ninth resistor R9 is connected to an output end of the comparator U1 and the control circuit 400.

[0089] In an embodiment, an infrared emitter is formed between the first end and the second end of the infrared photoelectric transceiver sensor S1, and a photosensitive transistor is formed between the third end and the fourth end. The infrared emitter can be an infrared LED that emits infrared light when the power supply VCC_3V3 is turned on. The photosensitive transistor receives the infrared light and generates a current signal when the infrared light irradiates the photosensitive transistor. The comparator U1 compares two input voltages, one input end of the comparator U1 is connected to a reference power supply (obtained by dividing the output voltage of the power supply by the seventh resistor R7 and the eighth resistor R8), and the other input end is connected to the third end of the infrared photoelectric transceiver sensor S1 to receive the current signal output by the infrared photoelectric transceiver sensor S1 and compare it with the reference power signal to output the final detection result. Based on this, the infrared emitter continuously emits infrared light, and when the printing medium passes through the infrared light path, the infrared light is reflected or blocked, causing the intensity of the infrared light received by the photosensitive transistor to change. When the photosensitive transistor receives sufficient infrared light, it is turned on and outputs a low-level signal; otherwise, when there is no infrared light or the infrared light is blocked, the photosensitive transistor is turned off and outputs a high-level signal. The control circuit 400 determines the presence or absence of the printing medium according to the signal output by the comparator U1 after comparison, and controls the working state of the first heating element and / or the second heating element accordingly.

[0090] In an embodiment, an infrared detection module is connected to the control circuit 400, and the infrared detection module is arranged at the platform entrance and the platform exit. The infrared detection module is used to output a corresponding infrared detection signal to the control circuit 400 after detecting the printing medium. The control circuit 400 is used to control the first heating element and the second heating element to enter standby mode or shutdown mode according to the infrared detection signal. It can be understood that when the infrared detection module detects the presence of the printing medium, it will output a corresponding infrared detection signal to the control circuit 400. According to the infrared detection signal, the control circuit 400 can control the drying assembly to enter standby mode or shutdown mode, thereby saving energy and prolonging the service life of the equipment. For example, when there is no printing medium passing through, the drying assembly can automatically enter a low-power standby state; and in the case of long-time non-operation, it can even be completely shut down. In this way, the infrared detection module improves the automation level of the system, reduces the need for manual intervention, and improves the overall work efficiency. It should be noted that in standby mode, the first heating element and the second heating element can enter the working state at any time, and in shutdown mode, the first heating element and the second heating element will not work.

[0091] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An inkjet printing device, characterized in that, The inkjet printing equipment includes: Printing platform; The print head is positioned above the printing platform and can move relative to the printing platform; A heating module is disposed on the printing platform to heat the printing medium on the printing platform; the heating module includes a temperature detection circuit, a medium detection circuit, a heating element, and a switching circuit; the temperature detection circuit is used to detect the temperature of the heating element and output a corresponding temperature signal; the medium detection circuit is used to output a material arrival signal when printing medium is present on the printing platform; the heating element is used to generate heat; and the switching circuit is connected to the heating element to control the power supply of the heating element. A control circuit is provided, which is connected to the temperature detection circuit, the medium detection circuit, and the switching circuit. The control circuit is used to control the switching circuit to open or close based on the temperature signal and the material arrival signal.

2. The inkjet printing device as described in claim 1, characterized in that, The printing platform has an inlet end, and the heating module is located at the inlet end; The media detection circuit is located at the inlet end and is used to output the material arrival signal when printing media is detected at the inlet end. The control circuit is used to control the switching circuit to control the power supply to the heating element based on the temperature signal and the material arrival signal.

3. The inkjet printing device as described in claim 1, characterized in that, The printing platform has an inlet end and an outlet end, and the number of heating modules is at least two, with at least one heating module provided at the inlet end and the outlet end respectively; The media detection circuit comprises at least two circuits, one located at the inlet end and one located at the outlet end. The media detection circuit located at the inlet end is used to output the material arrival signal when printing media is detected at the inlet end; the media detection circuit located at the outlet end is used to output the material arrival signal when printing media is detected at the outlet end. The control circuit is used to control the on / off state of the corresponding heating module's switching circuit based on the temperature signal and material arrival signal output by each heating module.

4. The inkjet printing device as described in claim 1, characterized in that, The heating element includes a metal heating plate and a winding loop wound around the outside of the metal heating plate. The winding loop defines a drying area on the metal heating plate. The winding loop is connected to the switching circuit. The heating element heats the printing medium through the drying area.

5. The inkjet printing device as described in claim 4, characterized in that, The temperature detection circuit also includes a temperature sensor, which is disposed on the metal heating plate. The temperature sensor is used to detect the temperature of the metal heating plate and output the corresponding temperature signal.

6. The inkjet printing apparatus according to any one of claims 1 to 5, characterized in that, The switching circuit includes a first resistor, a second resistor, and a first switching transistor; The control circuit is connected to one end of the second resistor and the controlled terminal of the first switching transistor via the first resistor. The other end of the second resistor is connected to the power supply and the first terminal of the first switching transistor. The second terminal of the first switching transistor is connected to the heating element.

7. The inkjet printing apparatus according to any one of claims 1 to 5, characterized in that, The inkjet printing device further includes a drive circuit, which is connected in series in the path between the switch circuit and the control circuit. The control circuit is used to control the drive circuit based on the temperature signal and the material arrival signal, so that the drive circuit drives the switch circuit to switch on and off.

8. The inkjet printing apparatus as described in claim 7, characterized in that, The driving circuit includes a third resistor, a fourth resistor, and a second switching transistor; One end of the third resistor is connected to the control circuit, and the other end of the third resistor is connected to one end of the fourth resistor and the controlled terminal of the second switch. The other end of the fourth resistor and the first terminal of the second switch share a common ground. The second terminal of the second switch is connected to the controlled terminal of the switching circuit. The control circuit is used to control the on / off state of the second switch to control the on / off state of the switching circuit.

9. The inkjet printing apparatus according to any one of claims 1 to 5, characterized in that, The media detection circuit includes an infrared detection circuit, which includes a signal transmitting end and a signal receiving end. The signal transmitting end is used to emit infrared light to the printing platform, and the signal receiving end is used to receive the infrared light signal after the infrared light is reflected. When the infrared detection circuit determines that there is printing media on the printing platform based on the infrared light signal, it outputs the material arrival signal.

10. The inkjet printing apparatus as described in claim 9, characterized in that, The infrared detection circuit includes: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, an infrared photoelectric transceiver sensor, and a comparator; The infrared photoelectric transceiver sensor has a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the infrared photoelectric transceiver sensor is grounded. The second terminal of the infrared photoelectric transceiver sensor is connected to a power supply through the fifth resistor. The third terminal of the infrared photoelectric transceiver sensor is connected to the first input terminal of the comparator and one end of the sixth resistor. The other end of the sixth resistor is connected to a power supply. The fourth terminal of the infrared photoelectric transceiver sensor is grounded. The second input terminal of the comparator is connected to one end of the seventh resistor, one end of the eighth resistor, and one end of the ninth resistor. The other end of the seventh resistor is grounded, the other end of the eighth resistor is connected to the power supply, and the other end of the ninth resistor is connected to the output terminal of the comparator and the control circuit.

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