Light-induced zoned temperature control directional heat source, zoned temperature control method and printer

Abstract

This invention belongs to the field of printer heating roller technology, specifically relating to a light-induced zoned temperature control directional heat source, a zoned temperature control method, and a printer, to alleviate the problem of low thermal energy utilization of the heating roller in existing printers. It includes a heating roller body, with multiple filling units carved out inside the heating roller body. These filling units are arranged at intervals along an axial direction, each corresponding to a heating zone. Each filling unit has multiple filling channels, which are arranged in a ring array around a point on the axis of the heating roller, radiating radially outwards. The heating roller provided by this invention has high thermal energy utilization and can achieve zoned temperature control.

Description

Technical Field

[0001] This invention belongs to the field of printer thermal roller technology, specifically relating to a light-induced zoned temperature control directional heat source, a zoned temperature control method, and a printer. Background Technology

[0002] Currently, only 1% of the heat in the printer's heat source fuser roller is used to fix the toner. The remaining heat is either used to heat the paper, wasted in standby mode, or used for preheating. The heat energy utilization rate directly used in the printing process is extremely low.

[0003] In addition, the entire width does not need to be printed during the printing process. The printing area is mainly concentrated in the middle, with blank sides. However, existing printing equipment heats the entire heating roller, which results in a waste of heat energy. Summary of the Invention

[0004] This invention provides a light-induced zoned temperature control directional heat source, a zoned temperature control method, and a printer to alleviate the problem of low thermal energy utilization of the heating roller in existing printers.

[0005] To address the aforementioned problems in the prior art, the present invention provides the following technical solution:

[0006] A light-induced zoned temperature-controlled directional heat source for printers, and further...

[0007] The roller includes a heating roller body, the interior of which is carved out multiple filling units. These filling units are arranged at intervals along the axial direction, and each filling unit corresponds to a heating zone.

[0008] The filling unit has multiple filling channels, each of which is arranged in a ring array around a point on the axis of the heating roller and radiates outward radially.

[0009] Furthermore, the filling channel is filled with heat-storing particles configured to absorb heat energy when the heating roller is first started and to release heat energy when the heating roller is restarted.

[0010] Furthermore, the heat storage particles include a core material and a SiO2 layer covering the outer surface of the core material. The core material includes one or more of BiOX, LiNO3, or paraffin, wherein X is a halogen.

[0011] Furthermore, the core material comprises BiOCl, LiNO3, and paraffin wax, wherein the molar ratio of BiOCl, LiNO3, and paraffin wax is 1:1:1, or...

[0012] The core material comprises BiOBr, LiNO3, and paraffin wax, wherein the molar ratio of BiOCl, LiNO3, and paraffin wax is 1:1:1, or...

[0013] The core material comprises BiOI, LiNO3 and paraffin wax, with a molar ratio of 1:1:1.

[0014] Furthermore, the heat storage particles are prepared using the following method:

[0015] 1) Preparation of the oil phase: Add 60 ml of lithium nitrate solution / soybean oil to a beaker, add surfactant, and stir continuously at 1000 rpm at 60 degrees Celsius for 1 h;

[0016] 2) Preparation of aqueous phase: Add the core material to a beaker containing 15 ml of deionized water and stir at 1500 rpm at 60 degrees Celsius for 30 min. Add ammonia water to provide an alkaline environment for the subsequent reaction, and then continue stirring for 30 min.

[0017] 3) Preparation of emulsion: Pour the aqueous phase into the oil phase and continue stirring for 90 min to form a uniform water-in-oil mixture system;

[0018] 4) Preparation of heat storage particles: The precursor was added to the emulsion through a syringe and stirred continuously at 60 degrees Celsius for 6 hours. The white precipitate was collected by centrifugation and finally dried to obtain heat storage particles.

[0019] A zoned temperature control method employs the aforementioned light-induced zoned temperature control directional heat source.

[0020] Furthermore, it includes the following steps:

[0021] 1): Multiple filling units are cut out inside the heating roller. The multiple filling units are arranged at intervals along the axial direction, and each filling unit corresponds to a heating zone.

[0022] 2): Inject heat-storing particles into the filling unit using auxiliary tools;

[0023] 3): A photo-induced excitation layer is circumferentially coated on the surface of the heating roller. The photo-induced excitation layer blocks the injection ports of all filling channels, so that the surface of the heating roller forms a smooth surface.

[0024] 8. The zoned temperature control method according to claim 7, characterized in that it includes the following steps:

[0025] The filling unit has multiple filling channels, each filling channel is arranged in a ring array around a point on the axis of the heating roller, and radiates outward radially.

[0026] Furthermore, the auxiliary tool is configured as a ring structure, and the auxiliary tool can be fitted onto the heating roller. Multiple injection points are provided on the inner circumferential surface of the ring of the auxiliary tool, and each injection point is provided with a syringe with the injection head facing the center of the circle.

[0027] A printer employs the aforementioned zoned temperature control method.

[0028] The technical effects achievable by this solution are analyzed as follows:

[0029] This solution provides a light-induced zoned temperature-controlled directional heat source for a printer, including a heating roller body. Multiple filling units are carved out inside the heating roller body, and these filling units are arranged at intervals along an axial direction. Each filling unit corresponds to a heating zone.

[0030] The filling unit has multiple filling channels, each of which is arranged in a ring array around a point on the axis of the heating roller and radiates outward radially.

[0031] The filling channel is filled with heat storage particles, which are configured to absorb heat energy when the heating roller is first started and to release heat energy when the heating roller is restarted.

[0032] The heat storage particles include a core material and a SiO2 layer covering the outer surface of the core material. The core material includes one or more of BiOX, LiNO3, or paraffin, wherein X is a halogen.

[0033] Assume that the heating roller has four heating zones along its axial direction, named the first heating zone, the second heating zone, the third heating zone, and the fourth heating zone.

[0034] When the input print signal only covers the second and third heating zones, the photoinduced excitation layers in these zones are excited by light, generating heat. This heat is then transferred to the internal heat storage particles, which regulate the absorption and release of the heat. When the printer needs to be restarted, the heat storage particles release the heat, thus significantly reducing the printer's warm-up time and improving heat utilization.

[0035] Furthermore, this invention achieves zoned and directional temperature control by controlling the on / off state of different heating zones.

[0036] The thermal conductivity and thermal conductivity coefficient of the core material with added BiOX (X = Cl, Br, I) are significantly increased. This is because BiOX (X = Cl, Br, I) halide has a lamellar structure with separated positive and negative charges. Heat transfer relies on phonons of different frequencies. Phonon transfer slows down at the interface. The two-dimensional structure reduces the number of interfaces. The unique planar structure and huge surface area provide a heat conduction path for phonon transfer, thus effectively improving the heat transfer efficiency. Attached Figure Description

[0037] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0038] Figure 1 A front view of a light-induced zoned temperature-controlled directional heat source provided in an embodiment of the present invention;

[0039] Figure 2 for Figure 1 AA section diagram.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100 - Fill channel. Detailed Implementation

[0042] Example 1

[0043] Molten salt has advantages such as high phase change temperature, high latent heat of phase change and low cost, making it an excellent heat transfer and storage material. However, molten salt has disadvantages such as easy corrosion of equipment and easy leakage. Encapsulating molten salt with an inert coating can not only effectively solve the above problems, but also improve its thermal performance.

[0044] The basic concept of this embodiment is:

[0045] The experiment first encapsulates molten salt to form heat storage particles, then injects the heat storage particles into a heating roller, and finally coats the heating roller with a photo-induced excitation layer around its circumference. When the heating roller needs to be started, the photo-induced excitation layer is directionally excited by a light source. After the photo-induced excitation layer is excited, the heating roller in the corresponding area starts the heating mode, and the heat storage particles store heat. When the heating roller needs to be started again, the heat storage particles release heat energy. This can save preheating time, save heat energy, and improve energy efficiency.

[0046] The preparation of heat storage particles is detailed below:

[0047] This experiment uses interfacial polymerization to prepare heat storage particles. First, an aqueous phase and an oil phase are prepared, and a surfactant is added to them to prepare a uniform and stable water-in-oil emulsion system.

[0048] The experimental steps are as follows:

[0049] 1. Preparation of the oil phase: Add 60 ml of lithium nitrate solution / soybean oil to a beaker, add a surfactant, and stir continuously at 1000 rpm and 60 degrees Celsius for 1 h;

[0050] 2. Preparation of aqueous phase: Add the core material to a beaker containing 15 ml of deionized water and stir at 1500 rpm at 60 degrees Celsius for 30 min. Add ammonia water to provide an alkaline environment for the subsequent reaction, and then continue stirring for 30 min.

[0051] The core material is one or more of BiOX (X = Cl, Br, I), LiNO3, and paraffin.

[0052] 3. Preparation of emulsion: Pour the aqueous phase into the oil phase and continue stirring for 90 min to form a uniform water-in-oil mixture system;

[0053] 4. Preparation of heat storage particles: The precursor was added to the emulsion through a syringe and stirred continuously at 60 degrees Celsius for 6 hours. The white precipitate was collected by centrifugation and finally dried to obtain heat storage particles.

[0054] In this process, tetraethyl orthosilicate serves as a precursor. The precursor undergoes hydrolysis and condensation reactions at the oil-water interface to generate SiO2, which then encapsulates the core material.

[0055] To characterize the thermal performance of the heat storage particles, the inventors conducted thermal conductivity and thermal diffusivity experiments on the core materials of different heat storage particles. The blank experiment consisted of a simple heating rod (made of ceramic particles). In No.4, the molar ratio of BiOCl, LiNO3, and paraffin was 1:1:1; in No.5, the molar ratio of BiOBr, LiNO3, and paraffin was 1:1:1; and in No.6, the molar ratio of BiOI, LiNO3, and paraffin was 1:1:1.

[0056] In this experiment, a thermal constant analyzer was used to test the thermal conductivity of the heat storage particles. The completely dried sample powder was loaded into a cylindrical mold and pressed into a pellet using a hydraulic press. The diameter of the test sample was 25 mm and the thickness was 15 mm.

[0057] The experimental results are listed below:

[0058]

[0059] The experimental results in the table above show that:

[0060] Compared with the blank experiment, the thermal conductivity of LiNO3 and paraffin increased by 58.9% and 96%, respectively. The thermal conductivity of No.4, No.5 and No.6 also increased significantly compared with the blank experiment, as well as No.2 and No.3.

[0061] Compared with the blank experiment, the thermal diffusivity of LiNO3 and paraffin increased by 64.2% and 177.8% respectively. The thermal diffusivity of No.5 and No.6 also increased significantly compared with the blank experiment, as well as No.2 and No.3.

[0062] Mechanism explanation: The thermal conductivity and thermal conductivity coefficient of the core material with added BiOX (X = Cl, Br, I) are significantly increased. The reason is that BiOX (X = Cl, Br, I) halide has a lamellar structure with positive and negative charges separated. Heat transfer relies on phonons of different frequencies. Phonon transfer slows down at the interface. The two-dimensional structure reduces the number of interfaces. The unique planar structure and huge surface area provide a heat conduction path for phonon transfer.

[0063] The photoinduced excitation layer coated on the surface of the heating roller includes carbon nanotubes (semiconductor carbon nanotubes or metal nanotubes). Semiconductor carbon nanotubes or metal nanotubes may have different lengths, diameters, and chirality. Preferably, the diameter is 0.5-20 nm and the length is 100 nm to 1000 nm. The metal nanotubes include a dielectric core and a metal shell. The dielectric core includes silica and / or titanium dioxide.

[0064] Since the entire area does not need to be printed during the printing process, the printing area is mainly concentrated in the middle, with blank sides. However, existing printing equipment requires heating the entire heating roller, which results in a waste of heat energy.

[0065] To address the aforementioned issues, this embodiment provides a zone control method, which identifies the area to be printed based on the printing signal, activates the corresponding heating area, and eliminates the need to activate areas without input signals.

[0066] The above effect is achieved through the following steps:

[0067] S1: Multiple filling units are cut out inside the heating roller. The multiple filling units are arranged at intervals along the axial direction, and each filling unit corresponds to a heating zone.

[0068] The filling unit has multiple filling channels 100, each filling channel is arranged in a ring array around a point on the axis of the heating roller, and radiates outward radially.

[0069] S2: Inject heat-storing particles into the filling unit using a syringe;

[0070] Specifically, injection is performed using an auxiliary tool, which is a ring structure that can be fitted onto a heating roller. Multiple injection points are provided on the inner circumference of the ring of the auxiliary tool, and each injection point is equipped with a syringe with the injection head facing the center of the circle.

[0071] S3: A photo-induced excitation layer is circumferentially coated on the surface of the heating roller. The photo-induced excitation layer blocks the injection ports of all filling channels, so that the surface of the heating roller forms a smooth surface.

[0072] The following is a detailed explanation of zoned temperature control:

[0073] Assume that the heating roller has four heating zones along its axial direction, named the first heating zone, the second heating zone, the third heating zone, and the fourth heating zone.

[0074] When the input print signal only covers the second and third heating zones, the photoinduced excitation layers in these zones are excited by light, generating heat. This heat is then transferred to the internal heat storage particles, which regulate the absorption and release of the heat. When the printer needs to be restarted, the heat storage particles release the heat, thus significantly reducing the printer's warm-up time and improving heat utilization.

[0075] Furthermore, this invention achieves zoned and directional temperature control by controlling the on / off state of different heating zones.

[0076] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A light-induced zoned temperature-controlled directional heat source for use in a printer, characterized in that: The roller includes a heating roller body, the interior of which is carved out multiple filling units. These filling units are arranged at intervals along the axial direction, and each filling unit corresponds to a heating zone. The filling unit has multiple filling channels, each of which is arranged in a ring array around a point on the axis of the heating roller and radiates outward radially. The filling channels are filled with heat storage particles, which are configured to absorb heat energy when the heating roller is first started and release heat energy when the heating roller is restarted. A photo-induced excitation layer is circumferentially coated on the surface of the heating roller. The photo-induced excitation layer blocks the injection ports of all filling channels, resulting in a smooth surface on the heating roller. When the heating roller is started for the first time, the light-induced excitation layer is excited by the light source. After the light-induced excitation layer is excited, the heating roller in the corresponding area starts the heating mode. The heat storage particles store heat after being heated. When the heating roller needs to be started again, the heat storage particles release heat energy.

2. The light-induced zoned temperature-controlled directional heat source according to claim 1, characterized in that: The heat storage particles include a core material and a SiO2 layer covering the outer surface of the core material. The core material includes one or more of BiOX, LiNO3, or paraffin, wherein X is a halogen.

3. The light-induced zoned temperature-controlled directional heat source according to claim 2, characterized in that: The core material comprises BiOCl, LiNO3, and paraffin wax, wherein the molar ratio of BiOCl, LiNO3, and paraffin wax is 1:1:1, or... The core material comprises BiOBr, LiNO3, and paraffin wax, wherein the molar ratio of BiOCl, LiNO3, and paraffin wax is 1:1:1, or... The core material comprises BiOI, LiNO3 and paraffin wax, with a molar ratio of 1:1:

1.

4. The light-induced zoned temperature-controlled directional heat source according to claim 3, characterized in that: The heat storage particles are prepared by the following method: 1) Preparation of the oil phase: Add 60 ml of lithium nitrate solution / soybean oil to a beaker, add surfactant, and stir continuously at 1000 rpm at 60 degrees Celsius for 1 h; 2) Preparation of aqueous phase: Add the core material to a beaker containing 15 ml of deionized water, stir at 1500 rpm at 60 degrees Celsius for 30 min, add ammonia water to provide an alkaline environment for the subsequent reaction, and then continue stirring for 30 min. 3) Preparation of emulsion: Pour the aqueous phase into the oil phase and continue stirring for 90 min to form a homogeneous water-in-oil mixture; 4) Preparation of heat storage particles: The precursor was added to the emulsion through a syringe and stirred continuously at 60 degrees Celsius for 6 hours. The white precipitate was collected by centrifugation and finally dried to obtain heat storage particles.

5. A zoned temperature control method, characterized in that, The light-induced zoned temperature-controlled directional heat source as described in any one of claims 1-4 is used.

6. The zoned temperature control method according to claim 5, characterized in that, Includes the following steps: 1): Multiple filling units are cut out inside the heating roller. The multiple filling units are arranged at intervals along the axial direction, and each filling unit corresponds to a heating zone. 2): Inject heat-storing particles into the filling unit using auxiliary tools; 3): A photo-induced excitation layer is circumferentially coated on the surface of the heating roller. The photo-induced excitation layer blocks the injection ports of all filling channels, so that the surface of the heating roller forms a smooth surface.

7. The zoned temperature control method according to claim 6, characterized in that, Includes the following steps: The filling unit has multiple filling channels, each filling channel is arranged in a ring array around a point on the axis of the heating roller, and radiates outward radially.

8. The zoned temperature control method according to claim 7, characterized in that, Includes the following steps: The auxiliary tool is configured as a ring structure and can be fitted onto the heating roller. Multiple injection points are provided on the inner circumference of the ring of the auxiliary tool, and each injection point is provided with a syringe with the injection head facing the center of the circle.

9. A printer, characterized in that, The zoned temperature control method as described in any one of claims 5-8 was adopted.

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