A printing apparatus and printing method

Abstract

This invention relates to the field of printer technology, and more specifically, to a printing apparatus and printing method. The printing apparatus includes a toner cartridge assembly, a fusing assembly, and a heat insulation assembly. The toner cartridge assembly and the fusing assembly are spaced apart; a portion of the paper guide channel passes through the fusing assembly; a portion of the paper guide channel is located on one side of the toner cartridge assembly. The heat insulation assembly includes a heat insulation unit and a heat dissipation unit; the heat insulation unit includes a heat insulation module and a heat conduction module; the heat insulation module is located between the fusing assembly and the toner cartridge assembly; the heat conduction module is located on the side of the heat insulation unit away from the paper guide channel; the heat conduction module is located on the side of the heat insulation unit away from the fusing assembly; the heat conduction module and the paper guide channel are thermally connected via a heat transfer section. The printing apparatus includes a heat dissipation state; the heat dissipation state includes: heat in the paper guide channel is transferred to the heat conduction module, and the heat dissipation unit dissipates the heat in the heat conduction module to the outside of the printing apparatus. This solves the problem of excessively high temperature in the toner cartridge assembly caused by heat transfer from the paper guide channel.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically, to a printing apparatus and a printing method. Background Technology

[0002] High-speed printers, with their core advantages of high printing speed and large paper throughput, are widely used in various fields such as office automation, commercial printing, and industrial batch printing. These printers typically include core components such as a transfer unit, a fuser unit, and a toner cartridge. During operation, toner is supplied through the toner cartridge, the transfer unit transfers the toner image to the surface of the printing medium, and then the fuser unit uses high temperature and pressure to melt the toner and firmly adhere it to the medium, thus completing the entire printing process.

[0003] However, in existing high-speed printers, the fusing assembly needs to maintain a high temperature continuously during prolonged printing to achieve toner fixing and curing, leading to a continuous accumulation and increase in temperature in the fusing area. Because the paper guide channel between the transfer and fusing assemblies lacks effective heat insulation or heat dissipation design, a large amount of heat generated in the fusing area is transferred to surrounding components through this channel, with some of the heat being conducted to the adjacent toner cartridge. The toner inside the cartridge is highly sensitive to temperature. When the cartridge is exposed to a high-temperature environment for extended periods, toner particles are prone to sticking together, clumping, or even chemical deterioration, leading to problems such as poor toner supply and toner clogging. This not only causes print quality defects such as blurry text, incomplete images, and uneven colors, but also accelerates wear on the printer's internal toner supply mechanism, shortening the equipment's lifespan and affecting the stability and reliability of high-speed printers in long-term continuous printing scenarios. Summary of the Invention

[0004] To address the problem of excessively high temperatures in the toner cartridge assembly caused by heat transfer from the paper guide channel, this invention provides a printing device and a printing method.

[0005] In a first aspect, the printing apparatus provided by the present invention includes:

[0006] Powder hopper assembly;

[0007] A fixing assembly, a toner cartridge assembly, and a fixing assembly are arranged at intervals; a portion of the paper guide channel passes through the fixing assembly; a portion of the paper guide channel is located on one side of the toner cartridge assembly;

[0008] A heat insulation assembly includes a heat insulation unit and a heat dissipation unit; the heat insulation unit includes a heat insulation module and a heat conduction module; the heat insulation module is disposed between the fixing assembly and the toner cartridge assembly; the heat conduction module is disposed on the side of the heat insulation unit away from the paper guide channel; the heat conduction module is disposed on the side of the heat insulation unit away from the fixing assembly; the heat conduction module and the paper guide channel are thermally connected through a heat transfer section.

[0009] The printing device includes a heat dissipation state; the heat dissipation state includes: heat in the paper guide channel is transferred to the heat conduction module through the heat transfer part, and the heat dissipation unit discharges the heat in the heat conduction module to the outside of the printing device in a direction away from the paper guide channel.

[0010] Optionally, the heat insulation module includes a first heat insulation plate, a second heat insulation plate, a connecting plate, and a heat insulation cavity; one end of the connecting plate is connected to the first heat insulation plate, and the other end is connected to the second heat insulation plate; the gap between the first heat insulation plate and the second heat insulation plate forms a heat insulation cavity.

[0011] Optionally, one end of the heat insulation cavity is connected to the paper guide channel, and the other end is connected to the heat conduction module to form the heat transfer section;

[0012] The heat dissipation process includes: the heat in the paper guide channel passes through the heat insulation cavity to the heat conduction module, and is then discharged to the outside of the printing device by the heat dissipation unit.

[0013] Optionally, the heat-conducting module includes a first heat-conducting plate, a second heat-conducting plate, a heat-conducting base plate, and a heat-conducting channel; the heat-conducting base plate is connected to the heat insulation module; the first heat-conducting plate and the second heat-conducting plate are respectively connected to the heat-conducting base plate; the first heat-conducting plate, the second heat-conducting plate, and the heat-conducting base plate together form the heat-conducting channel; the heat-conducting channel communicates with the heat insulation cavity, and the heat-conducting channel also communicates with the air outlet of the heat dissipation unit;

[0014] The heat dissipation state also includes: the heat dissipation unit drives the hot air in the heat insulation cavity to flow into the heat conduction channel, and discharges the hot air in the heat conduction channel to the outside of the printing device.

[0015] Optionally, the first heat-conducting plate and the second heat-conducting plate are spaced apart along the arrangement direction of the fixing assembly and the toner cartridge assembly; the first heat-conducting plate is located on the side of the second heat-conducting plate closer to the toner cartridge assembly; wherein, d1 > d2; d1 is the distance from the end of the first heat-conducting plate away from the paper guide channel to the paper guide channel, and d2 is the distance from the end of the second heat-conducting plate away from the paper guide channel to the paper guide channel;

[0016] The heat dissipation state includes: hot air in the heat insulation cavity enters the heat conduction channel through the end of the second heat conduction plate away from the paper guide channel.

[0017] Optionally, the heat insulation module further includes a guide plate; the guide plate is connected to one end of the connecting plate near the paper guide channel; the end of the guide plate facing the paper guide channel is inclined toward the fixing assembly in the paper feeding direction.

[0018] Optionally, the printing device further includes a paper guide assembly; the paper guide assembly includes a paper guide tray and a second heat dissipation hole; the paper guide tray and the spacing between it and the fixing assembly, the heat insulation assembly, and the toner cartridge assembly respectively form a portion of the paper guide channel;

[0019] The second heat dissipation hole penetrates the paper guide tray; one end of the second heat dissipation hole is connected to the paper guide channel, and the other end is connected to the outside air;

[0020] The heat dissipation state also includes: the heat dissipation unit drives external air through the second heat dissipation hole and the paper guide channel to cool the powder hopper assembly.

[0021] Optionally, there may be multiple second heat dissipation holes, and the number of second heat dissipation holes gradually decreases in the direction from the air inlet to the air outlet of the heat dissipation unit.

[0022] In a second aspect, the printing method provided by the present invention is applied to any of the printing devices described in the first aspect, and the printing method includes:

[0023] The fuser assembly heats up based on the print command trigger.

[0024] The heat dissipation unit dissipates heat from the heat conduction module when the temperature of the powder hopper component exceeds the set range.

[0025] The heat dissipation unit stops working when the temperature of the fixing component is below a set range.

[0026] Optionally, when the temperature of the powder hopper assembly exceeds a set range, the heat dissipation unit heats the insulation assembly by means of:

[0027] Since the temperature of the powder hopper assembly is greater than the set range, and one end of the paper in the paper guide channel is connected to the fixing assembly and the other end is connected to the transfer assembly, the heat dissipation unit dissipates heat in the first heat dissipation state.

[0028] Since the temperature of the powder hopper assembly is greater than the set range, and the paper in the paper guide channel is only connected to one of the fixing assembly or the transfer assembly, the heat dissipation unit dissipates heat in a second heat dissipation state.

[0029] In the first heat dissipation state, the air flow velocity in the paper guide channel is greater than that in the second heat dissipation state.

[0030] To address the problem of excessively high temperatures in the powder hopper assembly caused by heat transfer from the paper guide channel, this invention offers the following advantages:

[0031] By spacing the toner cartridge assembly and the fuser assembly, and placing a heat insulation module between them, a heat conduction module is installed on the side of the heat insulation unit away from the paper guide channel and the fuser assembly. This heat conduction module is then connected to the paper guide channel via a heat transfer unit. A heat dissipation unit is also configured. When the printing device is in a cooling state, heat from the paper guide channel is transferred to the heat conduction module via the heat transfer unit. The heat dissipation unit then exhausts the heat from the heat conduction module away from the paper guide channel to the outside of the printing device. This prevents the high-temperature heat generated by the fuser assembly from directly radiating to the toner cartridge assembly, weakening the heat transfer from the fuser assembly to the toner cartridge assembly. It also prevents the heat dissipation unit from interfering with the paper in the paper guide channel and affecting the temperature of the fuser assembly, maintaining the fuser assembly at the required temperature. Ultimately, this solves the problem of existing high-speed printers where heat from the fuser area is conducted to the toner cartridge assembly via the paper guide channel during long-term continuous printing, leading to toner adhesion, clumping, and even chemical deterioration. This causes problems such as poor toner supply, toner clogging, print quality defects, wear and tear on the toner supply mechanism, and shortened equipment lifespan. This ensures the stability and reliability of high-speed printers in long-term continuous printing scenarios. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a printing apparatus according to one embodiment;

[0033] Figure 2 for Figure 1 A partial structural diagram of the printing device;

[0034] Figure 3 middle Figure 2 A cross-sectional view of the printing device in the middle;

[0035] Figure 4 for Figure 3 Schematic diagram of the structure of the thermal insulation module;

[0036] Figure 5 for Figure 4 Cross-sectional view of the central insulation module;

[0037] Figure 6 for Figure 2 Schematic diagram of the central paper guide assembly;

[0038] Figure 7 This is a flowchart of a printing method according to one embodiment.

[0039] Reference numerals: 10, heat insulation component; 11, heat insulation unit; 111, heat insulation module; 1111, first heat insulation plate; 1112, second heat insulation plate; 1113, connecting plate; 1114, heat insulation cavity; 1115, guide plate; 112, heat conduction module; 1121, first heat conduction plate; 1122, second heat conduction plate; 1123, heat conduction base plate; 1124, heat conduction channel; 113, wiring module; 1131, wiring base plate; 1132, wiring side plate; 12, heat dissipation unit; 20, fixing component; 21, heating roller; 22, pressure roller; 30, powder hopper component; 40, paper guide component; 41, paper guide tray; 42, second heat dissipation hole; 50, transfer component; 51, photosensitive drum; 52, transfer roller; 60, housing component; 61, outer shell unit. Detailed Implementation

[0040] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0041] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0042] During the operation of the printing unit, the fusing assembly needs to maintain a high temperature to achieve toner fixing and curing. Especially in high-speed and long-term continuous printing scenarios, the temperature in the fusing area will continuously accumulate and rise. Since part of the paper guide channel passes through the fusing assembly and part is located on one side of the toner cartridge assembly, and the paper guide channel lacks effective heat insulation or heat dissipation design, a large amount of heat generated in the fusing area will be transferred to surrounding components through the paper guide channels. Some of this heat will be conducted to the toner cartridge assembly, which is spaced apart from the fusing assembly. The toner filled inside the toner cartridge assembly is quite sensitive to temperature. When exposed to a high-temperature environment for a long time, the toner particles are prone to sticking together, clumping, or even chemical deterioration, leading to problems such as poor toner supply and toner clogging. This not only causes printing quality defects such as blurry text, incomplete images, and uneven colors, but also accelerates the wear of the printer's internal toner supply mechanism, shortens the lifespan of the printing unit, and affects the stability and reliability of the printing unit in long-term continuous printing scenarios.

[0043] Example 1:

[0044] This embodiment proposes a printing device, such as... Figure 1 As shown, the printing device includes a toner cartridge assembly 30, a fuser assembly 20, and a heat insulation assembly 10.

[0045] like Figure 3 As shown, the toner cartridge assembly 30 and the fixing assembly 20 are spaced apart. This spacing reduces the heat radiated directly from the fixing assembly 20 to the toner cartridge assembly 30, and also provides installation space for the subsequent installation of the heat insulation assembly 10. Part of the paper guide channel passes through the fixing assembly 20; part of the paper guide channel is located on one side of the toner cartridge assembly 30, allowing paper to pass through the paper guide channel and enter the fixing assembly 20 for fixing.

[0046] The heat insulation component 10 includes a heat insulation unit 11 and a heat dissipation unit 12. The heat insulation unit 11 includes a heat insulation module 111 and a heat conduction module 112. The heat insulation module 111 is disposed between the fixing assembly 20 and the toner cartridge assembly 30. The heat insulation module 111 directly blocks the high-temperature heat generated by the fixing assembly 20 during the fixing process from diffusing towards the toner cartridge assembly 30, preventing heat from directly radiating to the toner cartridge assembly 30, thus reducing the heat conducted to the toner cartridge assembly 30 at the source. Moreover, by blocking some of the heat on one side of the fixing assembly 20, the fixing assembly 20 can maintain a temperature that meets the fixing requirements, thereby ensuring the fixing effect. The heat conduction module 112 is disposed on the side of the heat insulation unit 11 away from the paper guide channel. The heat conduction module 112 is disposed on the side of the heat insulation unit 11 away from the fixing assembly 20. The heat conduction module 112 is thermally connected to the paper guide channel through a heat transfer section. In this way, the heat from the heat insulation unit 11 can be transferred to the heat conduction module 112. The heat conduction module 112 is far away from the paper guide channel. When the heat dissipation unit 12 dissipates heat to the heat conduction module 112, it avoids the heat dissipation unit 12 interfering with the paper in the paper guide channel, thereby ensuring stability during fixing. Moreover, the heat conduction module 112 is on the side of the heat insulation unit 11 away from the fixing assembly 20. When the heat dissipation unit 12 dissipates heat to the heat conduction assembly, it can avoid the heat dissipation unit 12 affecting the heat of the fixing assembly 20. This allows the fixing assembly 20 to maintain a temperature that meets the fixing requirements and ensures the fixing effect.

[0047] The printing device includes a heat dissipation state; the heat dissipation state includes: heat in the paper guide channel is transferred to the heat conduction module 112 through the heat transfer part, and the heat dissipation unit 12 exhausts the heat in the heat conduction module 112 away from the paper guide channel to the outside of the printing device. This avoids heat accumulation inside the printing device, prevents high temperature from affecting the toner cartridge assembly 30, and thus prevents the toner in the toner cartridge assembly 30 from being affected by high temperature, resulting in adhesion, clumping, and other deterioration phenomena, thereby ensuring the reliability of printing operations.

[0048] Furthermore, such as Figure 4 and Figure 5 As shown, the heat insulation module 111 includes a first heat insulation plate 1111, a second heat insulation plate 1112, a connecting plate 1113, and a heat insulation cavity 1114. One end of the connecting plate 1113 is connected to the first heat insulation plate 1111, and the other end is connected to the second heat insulation plate 1112. The gap between the first heat insulation plate 1111 and the second heat insulation plate 1112 forms the heat insulation cavity 1114. In this way, the first heat insulation plate 1111 and the second heat insulation plate 1112 form the heat insulation cavity 1114. Compared with a single-layer heat insulation plate, the air insulation layer provided by the heat insulation cavity 1114 can further reduce the heat transferred from the fixing assembly 20 to the toner cartridge assembly 30. Moreover, compared with setting a solid heat insulation structure, the first heat insulation plate 1111 and the second heat insulation plate 1112 make the heat insulation module 111 lighter, making the printing device lighter.

[0049] Furthermore, one end of the heat insulation cavity 1114 is connected to the paper guide channel, and the other end is connected to the heat conduction module 112 to form a heat transfer section;

[0050] The heat dissipation process includes: heat from the paper guide channel passes through the heat insulation cavity 1114 to the heat conduction module 112, and is then exhausted to the outside of the printing device by the heat dissipation unit 12. In this way, hot air from the paper guide channel flows directly through the heat insulation cavity 1114 to the heat conduction module 112. The heat insulation cavity 1114 not only provides insulation but also functions as a heat transfer unit. Furthermore, this shortens the path of heat conduction from the paper guide channel to the heat conduction module 112, and the heat avoids the toner cartridge assembly 30, ensuring that the temperature around the toner cartridge assembly 30 is controlled within a safe threshold, thus guaranteeing the reliability of the printing device.

[0051] Furthermore, such as Figure 4 and Figure 5 As shown, the heat-conducting module 112 includes a first heat-conducting plate 1121, a second heat-conducting plate 1122, a heat-conducting base plate 1123, and a heat-conducting channel 1124; the heat-conducting base plate 1123 is connected to the heat insulation module 111; the first heat-conducting plate 1121 and the second heat-conducting plate 1122 are respectively connected to the heat-conducting base plate 1123; the first heat-conducting plate 1121, the second heat-conducting plate 1122, and the heat-conducting base plate 1123 together form the heat-conducting channel 1124; the heat-conducting channel 1124 is connected to the heat insulation cavity 1114, and the heat-conducting channel 1124 is also connected to the air outlet of the heat dissipation unit 12;

[0052] The heat dissipation process also includes: the heat dissipation unit 12 driving the hot air in the heat insulation cavity 1114 to flow into the heat conduction channel 1124, and exhausting the hot air in the heat conduction channel 1124 to the outside of the printing device. When the heat dissipation unit 12 is working, it can directly drive the hot air in the heat insulation cavity 1114 to flow directionally along the heat conduction channel 1124, preventing the hot air from diffusing or flowing back into the paper guide channel and the toner cartridge assembly 30 within the heat conduction channel 1124. This can efficiently dissipate heat to the outside of the printing device, thereby ensuring that the temperature of the toner cartridge assembly 30 is within a safe threshold.

[0053] Furthermore, such as Figure 4 and Figure 5As shown, the first heat-conducting plate 1121 and the second heat-conducting plate 1122 are spaced apart along the arrangement direction of the fixing assembly 20 and the toner cartridge assembly 30; the first heat-conducting plate 1121 is located on the side of the second heat-conducting plate 1122 closer to the toner cartridge assembly 30; wherein, d1 > d2; d1 is the distance from the end of the first heat-conducting plate 1121 away from the paper guide channel to the paper guide channel, and d2 is the distance from the end of the second heat-conducting plate 1122 away from the paper guide channel to the paper guide channel. This design allows for a larger opening in the heat conduction channel 1124 facing the insulation cavity 1114, enabling hot air in the insulation cavity 1114 to flow more smoothly into the heat conduction channel 1124. The design that the height of the first heat conduction plate 1121 is greater than that of the second heat conduction plate 1122 can form a seal between the toner cartridge assembly 30 and the heat conduction channel 1124, thereby preventing hot air in the heat conduction channel 1124 from flowing to the toner cartridge assembly 30, ensuring that the temperature of the toner cartridge assembly 30 is within a safe threshold, and ensuring the reliability of the printing device.

[0054] The heat dissipation state includes: hot air in the heat insulation cavity 1114 enters the heat conduction channel 1124 through the end of the second heat conduction plate 1122 away from the paper guide channel.

[0055] Furthermore, such as Figure 5 As shown, the heat insulation module 111 also includes a guide plate 1115; the guide plate 1115 is connected to the end of the connecting plate 1113 near the paper guide channel; the guide plate 1115 is inclined towards the end of the paper guide channel in the paper feeding direction 80 towards the fixing assembly 20. This inclination angle matches the paper feeding path, so that when the paper shakes or curls during the process of feeding to the fixing assembly 20, the inclined guide plate 1115 can guide the paper, ensuring that the paper is fixed smoothly and stably.

[0056] Furthermore, such as Figure 2 and Figure 6 As shown, the printing device also includes a paper guide assembly 40; the paper guide assembly 40 includes a paper guide tray 41 and a second heat dissipation hole 42; the paper guide tray 41 forms a partial paper guide channel with the gap between it and the fixing assembly 20, the heat insulation assembly 10 and the toner hopper assembly 30 respectively.

[0057] The second heat dissipation hole 42 penetrates the paper guide tray 41; one end of the second heat dissipation hole 42 is connected to the paper guide channel, and the other end is connected to the outside air. In this way, when the heat dissipation unit 12 drives the airflow of the heat insulation cavity 1114 to flow towards the heat conduction component, it will also drive the outside airflow into the paper guide channel. This allows the outside air to cool down the powder hopper assembly 30, reduce the temperature of the powder hopper assembly 30, and ensure that the temperature of the powder hopper assembly 30 is within the safe threshold.

[0058] The heat dissipation process also includes: the heat dissipation unit 12 drives external air through the second heat dissipation hole 42 and the paper guide channel to cool the powder hopper assembly 30.

[0059] Furthermore, such as Figure 6 As shown, there are multiple second heat dissipation holes 42, and the number of second heat dissipation holes 42 gradually decreases in the direction from the air inlet to the air outlet of the heat dissipation unit 12. This gradual design of the number of second heat dissipation holes 42 can make the airflow resistance in the paper guide channel more stable along the flow direction, and prevent cold air from being directly discharged to the outside of the printing device by the heat dissipation unit 12 after entering the paper guide channel. It can ensure that the external cold air has enough travel distance to flow through the toner cartridge assembly 30 after entering the paper guide channel, and ensure that there is enough cold air to cool the toner cartridge assembly 30.

[0060] In other embodiments, Figure 1 and Figure 2 As shown, the heat dissipation unit 12 includes a cooling fan and a first drive unit. The cooling fan is located beside the heat conduction channel 1124 and is drivenly connected to the first drive unit. The heat dissipation state includes: the first drive unit drives the cooling fan to rotate, the air inlet of the cooling fan faces the heat conduction channel 1124, and the air outlet of the cooling fan faces away from the heat conduction channel 1124. The cooling fan blows the hot air in the heat conduction channel 1124 to the outside of the printing device.

[0061] In some other embodiments, the heat insulation unit 11 further includes a wiring module 113; the wiring module 113 includes a wiring base plate 1131 and a wiring side plate 1132; the wiring base plate 1131 is connected to the side of the first heat-conducting plate 1121 facing away from the second heat-conducting plate 1122; the wiring side plate 1132 is connected to the end of the wiring base plate 1131 away from the first heat-conducting plate 1121; the first heat-conducting plate 1121, the wiring base plate 1131, and the wiring side plate 1132 together form a wiring channel, and the electrical connection wires of the printing device are arranged in the wiring channel.

[0062] In other embodiments, the toner cartridge assembly 30 includes a toner cartridge housing and toner; the toner is disposed inside the toner cartridge housing.

[0063] In other embodiments, the printing device can form a printing system together with the transfer assembly 50, the housing assembly 60, and the paper feed assembly. The transfer assembly 50 includes a photosensitive drum 51 and a transfer roller 52; the housing assembly 60 includes an outer shell unit 61 and a first heat dissipation hole 62. The outer shell unit 61 includes a side plate, a top cover, and a bottom plate; the top cover, the bottom plate, and multiple side plates together form an installation space for the printing device, the transfer assembly 50, the housing assembly 60, and the paper feed assembly. A cooling fan is connected to one of the side plates; the first heat dissipation hole 62 penetrates through the other side plate opposite to the cooling fan and communicates with the heat conduction channel 1124; when the heat dissipation unit 12 dissipates heat, external air enters the heat conduction channel 1124 through the first heat dissipation hole 62.

[0064] In other embodiments, the paper discharge assembly includes a first paper discharge roller, a second paper discharge roller, and a second drive unit. The first paper discharge roller and the second paper discharge roller are rotatably connected to the top cover. The second drive unit is drivenly connected to the first paper discharge roller. The outer side wall of the first paper discharge roller abuts against the outer side wall of the second paper discharge roller. When the first paper discharge roller rotates, it drives the second paper discharge roller to rotate together, so as to clamp and discharge the fixed paper to the outside of the printing system.

[0065] In some other embodiments, the heat insulation component 10 includes a first temperature measuring unit; the first temperature measuring unit is disposed on the side of the heat insulation component 11 facing the powder hopper assembly 30, and is used to detect the temperature at the powder hopper assembly 30.

[0066] In other embodiments, the fixing assembly 20 includes a heating roller 21, a pressure roller 22, a second temperature measuring unit, a fixing housing, and a protective cover. The heating roller 21 and the pressure roller 22 are rotatably connected to the fixing housing. The outer side wall of the heating roller 21 abuts against the outer side wall of the pressure roller 22, and the heating roller 21 and the pressure roller 22 are drivenly connected. When the heating roller 21 heats and rotates, it drives the pressure roller 22 to rotate synchronously to fix the paper between the heating roller 21 and the pressure roller 22. The protective cover and the second temperature measuring unit are respectively connected to the fixing housing. The second temperature measuring unit is located between the fixing housing and the protective cover. The protective cover is used to prevent the second temperature measuring unit from colliding with other components or external objects when the fixing assembly 20 is installed. The second temperature measuring unit is used to detect the temperature at the heating roller 21 and the pressure roller 22.

[0067] In other embodiments, the transfer assembly 50 includes a photosensitive drum 51 and a transfer roller 52; the photosensitive drum 51 and the transfer roller 52 abut against each other, and the photosensitive drum 51 and the transfer roller 52 are used to transfer toner onto paper and drive the paper to move toward the fixing assembly 20.

[0068] Example 2:

[0069] This embodiment also proposes a printing method, which is applied to any of the printing devices in Embodiment 1; such as Figure 7 As shown, the printing method includes steps S10, S20, and S30; steps S10, S20, and S30 are executed sequentially.

[0070] Step S10: Based on the print command trigger, the fuser assembly 20 is heated.

[0071] Step S20: Based on the temperature of the toner cartridge assembly 30 being greater than the set range, the heat dissipation unit 12 dissipates heat to the heat conduction module 112. In this way, the heat dissipation unit 12 only performs heat dissipation when the temperature of the toner cartridge assembly 30 is about to exceed the safety threshold. The heat dissipation unit 12 does not work continuously, which can ensure that the temperature at the fixing assembly 20 is kept at the temperature that meets the fixing requirements and ensure the stability of fixing.

[0072] Step S30: Based on the fact that the temperature of the fixing component 20 is less than the set range, the heat dissipation unit 12 stops working. In this way, when the temperature of the fixing component 20 is about to fail to meet the temperature required for fixing, the heat dissipation unit 12 stops working, and the fixing component 20 continues to heat up, so that the temperature of the fixing component 20 is maintained at the temperature required for fixing, thus ensuring the stability of fixing.

[0073] Furthermore, step S20 includes steps S21 and S22; steps S10, S21, and S30 are executed sequentially, or steps S10, S22, and S30 are executed sequentially.

[0074] Step S21: Based on the fact that the temperature of the toner cartridge assembly 30 is greater than the set range, and the paper in the paper guide channel is at least partially held by the fixing assembly 20 and at least partially held by the transfer assembly 50, the heat dissipation unit 12 dissipates heat in the first heat dissipation state. At this time, the paper is held by both the fixing assembly 20 and the transfer assembly 50, and the paper is constrained more stably, with a stronger ability to resist airflow disturbances. Even if the airflow speed in the paper guide channel is high at this time, it will not affect the paper in the paper guide channel. Cold air can be quickly introduced and hot air can be exhausted to the outside of the printing device.

[0075] Step S22: Based on the fact that the temperature of the toner cartridge assembly 30 is greater than the set range, and the paper in the paper guide channel is only held by one of the fixing assembly 20 or the transfer assembly 50, the heat dissipation unit 12 dissipates heat in the second heat dissipation state. At this time, the paper is only held by one of the fixing assembly 20 or the transfer assembly 50, and one end of the paper is in an unrestrained state, making it easy to be blown up and shaken by the airflow. At this time, the airflow speed in the paper guide channel is small, and it is not easily affected by the airflow and thus the fixing is not affected.

[0076] In the first heat dissipation state, the airflow velocity in the paper guide channel is greater than that in the second heat dissipation state. It is worth noting that the heat of the toner cartridge assembly 30 is mainly affected by heat conduction from the fuser assembly 20; the temperature of the fuser assembly 20 is always higher than that of the toner cartridge assembly 30.

[0077] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A printing device, characterized in that, The printing device includes: Powder hopper assembly; A fixing assembly, a toner cartridge assembly, and a fixing assembly are arranged at intervals; a portion of the paper guide channel passes through the fixing assembly; a portion of the paper guide channel is located on one side of the toner cartridge assembly; A heat insulation assembly includes a heat insulation unit and a heat dissipation unit; the heat insulation unit includes a heat insulation module and a heat conduction module; the heat insulation module is disposed between the fixing assembly and the toner cartridge assembly; the heat conduction module is disposed on the side of the heat insulation unit away from the paper guide channel; the heat conduction module is disposed on the side of the heat insulation unit away from the fixing assembly; the heat conduction module and the paper guide channel are thermally connected through a heat transfer section. The printing device includes a heat dissipation state; the heat dissipation state includes: heat in the paper guide channel is transferred to the heat conduction module through the heat transfer part, and the heat dissipation unit discharges the heat in the heat conduction module to the outside of the printing device in a direction away from the paper guide channel.

2. The printing apparatus according to claim 1, characterized in that, The heat insulation module includes a first heat insulation plate, a second heat insulation plate, a connecting plate, and a heat insulation cavity; one end of the connecting plate is connected to the first heat insulation plate, and the other end is connected to the second heat insulation plate; the gap between the first heat insulation plate and the second heat insulation plate forms a heat insulation cavity.

3. The printing apparatus according to claim 2, characterized in that, One end of the heat insulation cavity is connected to the paper guide channel, and the other end is connected to the heat conduction module to form the heat transfer section; The heat dissipation process includes: the heat in the paper guide channel passes through the heat insulation cavity to the heat conduction module, and is then discharged to the outside of the printing device by the heat dissipation unit.

4. A printing apparatus according to claim 3, characterized in that, The heat-conducting module includes a first heat-conducting plate, a second heat-conducting plate, a heat-conducting base plate, and a heat-conducting channel; the heat-conducting base plate is connected to the heat insulation module; the first heat-conducting plate and the second heat-conducting plate are respectively connected to the heat-conducting base plate. The first heat-conducting plate, the second heat-conducting plate, and the heat-conducting base plate together form the heat-conducting channel; The heat conduction channel is connected to the heat insulation cavity, and the heat conduction channel is also connected to the air outlet of the heat dissipation unit; The heat dissipation state also includes: the heat dissipation unit drives the hot air in the heat insulation cavity to flow into the heat conduction channel, and discharges the hot air in the heat conduction channel to the outside of the printing device.

5. A printing apparatus according to claim 4, characterized in that, The first heat-conducting plate and the second heat-conducting plate are spaced apart along the arrangement direction of the fixing assembly and the toner cartridge assembly; the first heat-conducting plate is located on the side of the second heat-conducting plate closer to the toner cartridge assembly; wherein, d1 > d2; d1 is the distance from the end of the first heat-conducting plate away from the paper guide channel to the paper guide channel, and d2 is the distance from the end of the second heat-conducting plate away from the paper guide channel to the paper guide channel; The heat dissipation state includes: hot air in the heat insulation cavity enters the heat conduction channel through the end of the second heat conduction plate away from the paper guide channel.

6. A printing apparatus according to claim 2, characterized in that, The heat insulation module also includes a guide plate; the guide plate is connected to the end of the connecting plate near the paper guide channel; the end of the guide plate facing the paper guide channel is inclined toward the fixing assembly in the paper feeding direction.

7. A printing apparatus according to claim 1, characterized in that, The printing device further includes a paper guide assembly; the paper guide assembly includes a paper guide tray and a second heat dissipation hole; the paper guide tray and the spacing between the fixing assembly, the heat insulation assembly and the toner hopper assembly respectively form a portion of the paper guide channel; The second heat dissipation hole penetrates the paper guide tray; one end of the second heat dissipation hole is connected to the paper guide channel, and the other end is connected to the outside air; The heat dissipation state also includes: the heat dissipation unit drives external air through the second heat dissipation hole and the paper guide channel to cool the powder hopper assembly.

8. A printing apparatus according to claim 7, characterized in that, The number of the second heat dissipation holes is multiple, and the number of the second heat dissipation holes gradually decreases in the direction from the air inlet to the air outlet of the heat dissipation unit.

9. A printing method, characterized in that, Applied to the printing apparatus of any one of claims 1-8; Printing methods include: The fuser assembly heats up based on the print command trigger. The heat dissipation unit dissipates heat from the heat conduction module when the temperature of the powder hopper component exceeds the set range. The heat dissipation unit stops working when the temperature of the fixing component is below a set range.

10. A printing method according to claim 9, characterized in that, The process of the heat dissipation unit dissipating heat from the insulation component when the temperature of the powder hopper component exceeds a set range includes: Since the temperature of the powder hopper assembly is greater than the set range, and the paper in the paper guide channel is at least partially held by the fixing assembly and at least partially held by the transfer assembly, the heat dissipation unit dissipates heat in a first heat dissipation state. Since the temperature of the powder hopper assembly is greater than the set range, and the paper in the paper guide channel is only held by one of the fixing assembly or the transfer assembly, the heat dissipation unit dissipates heat in the second heat dissipation state. In the first heat dissipation state, the air flow velocity in the paper guide channel is greater than that in the second heat dissipation state.

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