Roller body cooling device and image forming equipment

Abstract

The utility model discloses a roller body cooling device and image forming equipment, the roller body cooling device comprises: a heat dissipation member capable of moving along a preset path, when the heat dissipation member is located at the starting end of the preset path, a preset distance is formed between the heat dissipation member and the outer surface of the roller body, and the heat dissipation member is located at the starting end of the preset path; when the heat dissipation piece is located at the tail end of the preset path, the heat dissipation piece is close to or makes contact with at least part of the outer surface of the roller body. The driving piece is connected with the heat dissipation piece so as to drive the heat dissipation piece to move back and forth on the preset path; and the temperature sensor is used for detecting the temperature of the roller body. The driving piece drives the heat dissipation piece to move along the preset path so as to be close to or away from the roller body, meanwhile, the temperature sensor is used for detecting the temperature of the roller body, and heat dissipation of the roller body can be accelerated when the roller body is overheated; the roller body cooling device is simple in structure and easy to achieve, the heat dissipation capacity of the roller body can be improved, and abnormal accidents are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation control, in particular to a roller cooling device and image forming equipment. Background Art

[0002] During the printing process, the fuser roller and pressure roller heat and pressurize the toner to adhere it to the paper. The fuser roller is heated primarily by heating elements, either as a whole or in sections. Conventional technology uses a method of heating the fuser roller as a whole, which can cause overheating of the portion not passing through the paper when printing on small-sized paper. Using a method of heating the fuser roller in sections can cause local overheating due to an abnormality in a heating element, potentially leading to malfunctions. While existing technologies offer design solutions for dissipating heat to prevent the fuser roller from overheating, their mechanisms and implementations are complex and susceptible to electrical interference, resulting in low reliability in heat dissipation control. Utility Model Content

[0003] The purpose of the utility model is to provide a roller cooling device and an image forming device, which can realize local rapid heat dissipation of the roller and prevent abnormal accidents caused by local overheating.

[0004] In a first aspect, the present invention provides a roller cooling device, comprising:

[0005] a heat dissipation member movable along a preset path, wherein when the heat dissipation member is located at a starting end of the preset path, a preset distance is maintained between the heat dissipation member and an outer surface of the roller body, and when the heat dissipation member is located at an end of the preset path, the heat dissipation member is close to or in contact with at least a portion of the outer surface of the roller body;

[0006] a driving member connected to the heat sink to drive the heat sink to reciprocate along the preset path;

[0007] The temperature sensor is used to detect the temperature of the roller body.

[0008] In the roller cooling device as described above, preferably, the heat dissipation element includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are sequentially distributed along the axis direction of the roller.

[0009] In the roller cooling device as described above, preferably, each of the heat sinks is correspondingly provided with an independent driving component and a temperature sensor.

[0010] In the roller cooling device as described above, preferably, the temperature sensor is provided corresponding to the heat sink or the roller.

[0011] In the roller cooling device as described above, preferably, the temperature sensor is a non-contact temperature sensor provided on the heat sink.

[0012] In the roller cooling device as described above, preferably, the roller is a fixing roller in an image forming device.

[0013] A roller cooling device as described above, wherein preferably, the heat sink has a first end and a second end, the first end of the heat sink has a fitting arc surface, the fitting arc surface is used to fit with at least part of the outer surface of the roller, and the driving member is connected to the second end of the heat sink.

[0014] In the roller cooling device as described above, preferably, the heat sink is made of metal.

[0015] In the roller cooling device as described above, preferably, the driving member includes a driving motor or a driving cylinder, and the driving member is directly connected to the heat sink or connected to the heat sink through a power transmission member.

[0016] In a second aspect, the present invention provides an image forming apparatus, comprising the aforementioned roller cooling device.

[0017] The image forming device as described above, wherein preferably, the image forming device further includes a fixing roller, and a fixing member is provided on the inner side wall close to the fixing roller, and the fixing member is used to fix the roller cooling device.

[0018] Compared with the prior art, the present invention drives the heat dissipation element to move along a preset path through a driving element to approach or move away from the roller body, and uses a temperature sensor to detect the temperature of the roller body, which can help accelerate the heat dissipation of the roller body when the roller body is overheated; and the roller cooling device of the present invention has a relatively simple structure and is easy to implement. Its heat dissipation object can be applied to the fixing roller of the image forming equipment, which can help improve the heat dissipation capacity of the roller body and reduce the occurrence of abnormal accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a roller cooling device provided in an embodiment of the present utility model;

[0020] Figure 2 This is a side view of the roller cooling device provided by an embodiment of the present utility model;

[0021] Figure 3 This is a front view of the roller cooling device provided by an embodiment of the present utility model;

[0022] Figure 4It is a structural schematic diagram of an image forming device provided by an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 10-roller cooling device, 11-heat sink, 111-conforming arc surface, 12-driving element, 13-temperature sensor, 14-power transmission element;

[0025] 20-image forming device, 21-fixing roller, 22-pressure roller, 23-fixing part, 24-paper cassette, 25-paper path. DETAILED DESCRIPTION

[0026] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] First, refer to Figures 1 to 3 As shown, the present invention provides a roller cooling device 10, comprising a heat sink 11, a driving member 12 and a temperature sensor 13, wherein:

[0028] The heat sink 11 can move along a preset path. When located at the beginning of the preset path, a preset distance exists between the heat sink 11 and the outer surface of the roller. To prevent heat radiation generated during roller operation from affecting the heat sink 11 and thereby affecting its heat dissipation performance, the heat sink 11 maintains a preset distance from the roller when the roller is operating normally and no heat dissipation is required. This prevents the heat sink 11 from being affected by the roller. When located at the end of the preset path, the heat sink 11 is in close proximity to or in contact with at least a portion of the outer surface of the roller, achieving heat dissipation and cooling of the roller.

[0029] In the embodiment provided in the present application, the preset path is the movement path of the heat sink 11 approaching or moving away from the roller body, the starting end of the preset path is the position where the heat sink 11 is away from the roller body, and the end of the preset path is the position where the heat sink 11 is close to or contacts the roller body. When the roller body needs to dissipate heat, the heat sink 11 moves from the starting end of the preset path to the end of the preset path to achieve heat dissipation and cooling of the roller surface.

[0030] The driving member 12 is connected to the heat sink 11 , and provides a driving force for the heat sink 11 so that the heat sink 11 can reciprocate along a preset path.

[0031] The temperature sensor 13 is used to detect the temperature of the roller body. When the temperature sensor 13 detects that the temperature of the roller body is within the normal range, the heat sink 11 remains at the starting end of the preset path and there is no need to dissipate heat to the roller body. When the temperature sensor 13 detects that the temperature of the roller body is too high, the driving member 12 drives the heat sink 11 to move to the end of the preset path to approach or contact the roller body, thereby dissipating heat from the overheated part of the roller body to prevent local overheating of the roller body from causing abnormal accidents.

[0032] In order to achieve the flexibility of local heat dissipation of the roller body, in the embodiment provided in this application, reference is made to Figure 1 As shown, the heat sink 11 includes a plurality of heat sinks, which are distributed in sequence along the axial direction of the roller body to divide the roller body into multiple sections along its axial direction for heat dissipation. When the temperature of a section of the roller body is too high, the corresponding heat sink moves to the end of the preset path to dissipate heat and cool down the section of the roller body, thereby realizing segmented and flexible heat dissipation and improving the heat dissipation capacity of the roller body.

[0033] Furthermore, in order to improve the efficiency of segmented heat dissipation of the roller, each heat sink is provided with an independent driving member 12 and a temperature sensor 13. Each temperature sensor 13 only detects the temperature of the corresponding part of the roller, and the driving member 12 only drives the corresponding heat sink to move back and forth along the preset path.

[0034] The temperature sensor 13 can be located on the heat sink 11 or on the roller, with the primary requirement being to detect the roller's temperature. Preferably, the temperature sensor 13 is a non-contact type located on the heat sink 11. Non-contact sensors offer advantages such as fast measurement speed, high accuracy, ease of use, and safety and reliability. Installing them on the heat sink 11 facilitates accurate measurement of the roller's temperature. Specifically, the non-contact temperature sensor 13 can be an infrared temperature sensor. Infrared temperature sensors determine the roller's temperature by detecting infrared energy emitted by an object without requiring direct contact with the roller, resulting in accurate measurement results. In other embodiments, other types of non-contact sensors may be used, and this is not a limitation here.

[0035] In one feasible embodiment, the roller body is the fixing roller 21 in the image forming device 20. During operation of the image forming device 20, the fixing roller 21 heats and pressurizes the toner to adhere to the paper. Since the fixing roller 21 includes a heating component, local overheating may occur during the heating process. Therefore, the roller body cooling device 10 of the present application can be used to locally dissipate heat. Specifically, multiple heat sinks are arranged along the axis of the fixing roller 21, and each heat sink is provided with a non-contact temperature sensor 13. To prevent the heat radiation generated during the heating process of the fixing roller 21 from affecting the heat sink, when heat dissipation is not required, the heat sink is at least 0.5 cm away from the fixing roller 21. When the fixing roller 21 is locally overheated, the driving member 12 at the corresponding position drives the heat sink closer to the fixing roller 21 to achieve local heat dissipation of the fixing roller 21.

[0036] Since the roller body is a roughly cylindrical structure, in order to improve the heat dissipation effect of the heat dissipation element 11, in the embodiment provided in this application, Figure 2 As shown, the heat sink 11 has a first end and a second end. The first end of the heat sink 11 has a contact arc surface 111 that conforms to the shape of the outer surface of the roller. When the heat sink 11 dissipates heat, the contact arc surface 111 can contact at least a portion of the outer surface of the roller. The driving member 12 is connected to the second end of the heat sink 11. When the roller needs to dissipate heat, the driving member 12 drives the heat sink 11 closer to the roller so that the contact arc surface 111 of the heat sink 11 can contact the outer surface of the roller, thereby maximizing the contact area between the heat sink 11 and the roller, thereby improving the heat dissipation effect of the heat sink 11.

[0037] To further enhance the heat dissipation effect of the heat sink 11, the heat sink 11 is made of metal. Compared to other materials, metal has higher thermal conductivity, resulting in superior heat conduction performance and higher heat dissipation efficiency. Preferably, the heat sink 11 is made of aluminum. In addition to its excellent thermal conductivity, aluminum is also lightweight and corrosion-resistant. This heat sink 11 not only effectively dissipates heat from the roller, but also has a long service life. The heat sink 11 can also be made of other metal materials, which are not limited here.

[0038] In the embodiments provided in this application, refer to Figure 3 As shown, the driving member 12 includes a driving motor or a driving cylinder to drive the heat sink 11 to move along a preset path. The driving member 12 can be directly connected to the heat sink 11, or connected to the heat sink 11 through a power transmission member 14. When the driving member 12 is connected to the heat sink 11 through the power transmission member 14, in order to prevent the heat on the heat sink 11 from being transferred to the driving member 12, the power transmission member 14 can be made of high-temperature resistant plastic products or other high-temperature resistant materials. It can be selected according to actual conditions and is not limited here.

[0039] In a second aspect, the present invention provides an image forming device 20, comprising the aforementioned roller cooling device 10, a fixing roller 21, and a fixing member 23 provided on the inner side wall near the fixing roller 21. The fixing member 23 is used to fix the roller cooling device 10 on the inner side wall of the image forming device 20. The roller cooling device 10 can locally dissipate heat and cool the fixing roller 21. Figure 4 As shown, the image forming device 20 also includes a paper box 24 and a pressure roller 22. The paper box 24 is used to hold paper, and the paper is transported along the paper path 25 shown in the figure. When the paper is transported between the fixing roller 21 and the pressure roller 22, the fixing roller 21 heats and pressurizes the toner on the paper, so that the toner adheres to the paper. During the operation of the image forming device 20, the roller cooling device 10 can dissipate heat from any locally overheated part on the fixing roller 21, which can effectively avoid the occurrence of abnormal accidents due to the inability to dissipate heat in a timely and accurate manner due to local overheating, thereby improving the working efficiency of the image forming device 20.

[0040] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A roller cooling device, characterized in that: include: a heat dissipation member movable along a preset path, wherein when the heat dissipation member is located at a starting end of the preset path, a preset distance is maintained between the heat dissipation member and an outer surface of the roller body, and when the heat dissipation member is located at an end of the preset path, the heat dissipation member is close to or in contact with at least a portion of the outer surface of the roller body; a driving member connected to the heat sink to drive the heat sink to reciprocate along the preset path; The temperature sensor is used to detect the temperature of the roller body.

2. The roller cooling device according to claim 1, characterized in that: The heat dissipation element includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are sequentially distributed along the axis direction of the roller body.

3. The roller cooling device according to claim 2, characterized in that: Each of the heat sinks is correspondingly provided with an independent driving component and a temperature sensor.

4. The roller cooling device according to claim 1, characterized in that: The temperature sensor is provided corresponding to the heat sink or the roller body.

5. The roller cooling device according to claim 4, characterized in that: The temperature sensor is a non-contact temperature sensor arranged on the heat sink.

6. The roller cooling device according to claim 1, characterized in that: The roller body is a fixing roller in an image forming device.

7. The roller cooling device according to claim 1, characterized in that: The heat sink has a first end and a second end. The first end of the heat sink has a fitting arc surface, and the fitting arc surface is used to fit with at least a portion of the outer surface of the roller body. The driving member is connected to the second end of the heat sink.

8. The roller cooling device according to claim 1, characterized in that: The heat sink is made of metal.

9. The roller cooling device according to claim 1, characterized in that: The driving member includes a driving motor or a driving cylinder, and the driving member is directly connected to the heat sink or connected to the heat sink through a power transmission member.

10. An image forming apparatus, characterized in that: The roller cooling device comprises the roller cooling device according to any one of claims 1 to 9.

11. The image forming apparatus according to claim 10, wherein The image forming device further comprises a fixing roller, and a fixing member is provided on the inner side wall close to the fixing roller, and the fixing member is used for fixing and connecting the roller body cooling device.

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