JP2016224147A - Air blowing mechanism and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling mechanism that has better cooling efficiency than a prior art and suppresses the occurrence of turbulence.SOLUTION: A cooling mechanism 70 comprises: a louver 41 that takes in an air; a fan 30 that blows the air taken in from the louver 41; and a guide part 34 that includes an inclined surface 34a approaching from the louver 41 to the fan 30, and guides an air in order from the louver 41, inclined surface 34a, and fan 30. The inclined surface 34a includes an outer end part 34a1 on the louver 41 side and an inner end part 34a2 on the fan 30 side; the inner end part 34a2 is arranged downstream in an air-blowing direction J of the fan 30 of an upstream end 30a in the air-blowing direction J.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a blower mechanism that blows air, and an image forming apparatus such as a printer or a copier using an electrophotographic system including the blower mechanism.

  2. Description of the Related Art Conventionally, some image forming apparatuses include a fan arranged inside the apparatus main body and a louver provided in an opening formed in an exterior part arranged outside the fan. In some cases, the air sucked in by the louver and the fan is taken into the apparatus main body, the unit inside the apparatus main body is cooled, and the air is discharged to the outside of the apparatus main body by the fan and the louver.

  As inventions related to an image forming apparatus including such a fan, the inventions described in Patent Document 1 and Patent Document 2 are disclosed. Patent Document 1 discloses an image forming apparatus in which an air intake opening is provided in a front plate and outside is taken in by a fan to cool the inside of the apparatus main body. Further, Patent Document 2 discloses an image forming apparatus that cools the inside of the apparatus main body by providing a louver larger than the outer periphery of the fan on an exterior member close to the fan.

JP 2012-203886 A JP 2010-072161 A

  However, as shown in FIG. 7, if the fan inside the apparatus main body and the louver provided in the exterior portion are substantially the same size (Patent Document 1), the air cannot be sufficiently sucked, The inside of the apparatus main body may not be sufficiently cooled. In addition, if the louver is designed to be larger than the fan in order to suck in more air (Patent Document 2), turbulent flow is generated around the louver, so that the air cannot be sucked in efficiently. In some cases, the interior of the unit cannot be cooled sufficiently.

  In view of the above circumstances, an object of the present invention is to provide a cooling mechanism that has better cooling efficiency than conventional ones and that suppresses the occurrence of turbulent flow.

  In order to achieve the above object, the cooling mechanism of the present invention includes an intake port for sucking air, a blower unit for blowing air sucked from the intake port, and an inclined surface approaching the blower unit from the intake port. And an air guide unit that guides air in the order of the air inlet, the inclined surface, and the air blowing means, and the inclined surface has a first end on the air inlet side and an air inlet side. A second end portion, and the second end portion is disposed downstream of the upstream direction of the blowing unit in the blowing direction.

  According to the present invention, the cooling efficiency is better than before and the generation of turbulent flow is suppressed.

1 is a cross-sectional view of an image forming apparatus according to Embodiment 1. FIG. 1 is a perspective view of an image forming apparatus. (A) is a side view which shows the louver of an apparatus main body. (B) is a perspective view of a cooling mechanism. (A) is sectional drawing which shows the structure of a cooling mechanism. (B) and (c) are partial expanded sectional views of (a). It is sectional drawing which shows the cooling mechanism which has a stopper part. FIG. 6A is a side view of an image forming apparatus provided with two fans according to a second embodiment. (B) is sectional drawing of the part periphery of the fan of (a). (C) is an expanded sectional view of the guidance | induction part of (b). It is a side view which shows an example of the conventional image forming apparatus.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, since the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are appropriately changed depending on the configuration of the apparatus to which the invention is applied and various conditions, there is no specific description. As long as the scope of the invention is not limited to these, it is not intended. In addition, regarding the structure of a later Example, about the structure same as a previous Example, the code | symbol same as the previous Example is attached | subjected and the description in a previous Example shall be used.

  FIG. 1 is a cross-sectional view of an image forming apparatus 10 according to the first embodiment. The image forming apparatus 10 is a color image forming apparatus. According to a signal sent from an external device such as a personal computer connected to the image forming apparatus 10 so as to be communicable, recording sheets, OHP sheets, and the like are electrophotographic. An image is formed on the transfer material S.

  The image forming apparatus 10 includes an apparatus main body 10A. In the apparatus main body 10A, a plurality of image forming units a, b, c, and d that form toner images of yellow, magenta, cyan, and black are arranged linearly in a substantially horizontal direction here. . Further, an intermediate transfer device 61 is disposed so as to face the image forming units a, b, c, and d. The image forming unit G that forms an image is configured including the image forming units a, b, c, and d and the intermediate transfer device 61.

  The intermediate transfer device 61 of this embodiment has an intermediate transfer belt 5 that is an endless belt as an intermediate transfer member, which is stretched by stretching members (a driving roller 6, a tension roller 7, and a driven roller 8). The intermediate transfer device 61 is an intermediate transfer device 61 that rotates and moves the intermediate transfer belt 5 in the direction of the arrow K facing the image forming units a, b, c, and d. Since the image forming units a, b, c, and d have the same configuration and function except that the color of the toner image to be formed is different, the configuration of the image forming unit d will be described as a representative.

  The image forming unit d forms a toner image by a known electrophotographic image forming process. In the image forming unit d, a cylindrical electrophotographic photosensitive member, that is, a photosensitive drum 1d is provided as an image carrier so as to be rotatable in the direction of arrow Y in the figure. In the image forming operation, first, the surface of the rotating photosensitive drum 1d is charged by the charging roller 2d as charging means. Next, the laser scanner 3 as an exposure unit emits light in accordance with a signal sent from the computer, and an electrostatic image is formed on the photosensitive drum 1d by performing scanning exposure on the charged photosensitive drum 1d.

  The electrostatic image formed on the photosensitive drum 1d is visualized as a toner image by being supplied with toner as a developer by a developing roller 4d as developing means. The toner image visualized on the photosensitive drum 1d is electrostatically transferred onto the intermediate transfer belt 5 by the action of the photosensitive drum 1d and the primary transfer roller 9d as a primary transfer unit in the primary transfer portion T1. Transcribed. The primary transfer residual toner remaining on the surface of the photosensitive drum 1d is cleaned and removed by the cleaning device 11d, and then subjected to an image forming process below charging.

  The toner images formed on the photosensitive drums 1a, 1b, 1c, and 1d of the image forming units a, b, c, and d in accordance with the above process are sequentially transferred to the intermediate transfer belt 5. A color toner image is formed by being superimposed and transferred onto the belt 5.

  On the other hand, the transfer material S sent out from the accommodating portion 17 by the feed roller pair 13 or the like takes time to contact the secondary transfer roller 12 as the secondary transfer means and the intermediate transfer belt 5 (secondary transfer). It is conveyed to the transfer portion T2). The toner image on the intermediate transfer belt 5 is electrostatically transferred to the transfer material S by the action of the secondary transfer roller 12 in the secondary transfer portion T2.

  Next, the transfer material S is separated from the intermediate transfer belt 5 and conveyed to the fixing unit 14. Here, the toner image on the transfer material S is pressurized and heated to be firmly fixed on the transfer material S. Thereafter, the transfer material S is conveyed and discharged onto the discharge tray 15. Further, the secondary transfer residual toner remaining on the surface of the intermediate transfer belt 5 is cleaned and removed by the cleaning device 20.

  In the image forming apparatus 10 of the present embodiment, the intermediate transfer device 61 as a transfer unit is detachable from the apparatus main body 10A. Further, the photosensitive drums 1a to 1d, the charging rollers 2a to 2d, and the developing rollers 4a to 4d of the image forming units a, b, c, and d are integrally formed into a cartridge by a frame so as to be connected to the apparatus main body 10A. A removable process cartridge may be used.

  FIG. 2 is a perspective view of the image forming apparatus 10. As shown in FIG. 2, the fan 30 that is a blowing member is held by a fan holder 31 that is a holding member. The fan 30 is disposed inside the exterior portion 40, and the fan holder 31 is fixed to the right side plate 18 (see FIG. 4) with screws (not shown). Here, the fan 30 is disposed on the right front side of the apparatus main body 10A.

  FIG. 3A is a side view showing the louver 41 of the apparatus main body 10A. The louver 41 as an “intake port” is an intake port for taking in outside air, and has an overlapping portion 41a and a non-overlapping portion 41b. In the side view of the apparatus main body 10A, the overlapping portion 41a is a portion that overlaps the fan 30 of the exterior portion 40, and the non-overlapping portion 41b is a portion that extends downward from the fan 30 of the exterior portion 40.

  In addition, an electrical component (not shown) is arranged near the right side of the fan 30 shown in FIG. It is necessary to hide the electric parts so that they cannot be seen by the user. Further, since the fan 30 is disposed at the above-described position, the louver 41 extends only in the downward direction of the fan 30 in this embodiment.

  When there is no restriction such as the arrangement position of the fan 30 and the arrangement of the electrical parts with respect to the apparatus main body 10A, the louver 41 is not limited to the downward direction, and the left and right, the upper direction, and all four directions are extended so that more outside air is discharged. It should be configured to incorporate.

  FIG. 3B is a perspective view of the cooling mechanism 70. As shown in FIG. 3B, the outside air passes through the louver 41 by the rotation of the fan 30 and is taken into the apparatus main body 10A. Further, the outside air is guided to the inside of the apparatus main body 10A by the fan holder 31, the upper duct 32, and the lower duct 33, and is provided in the lower duct 33 corresponding to the positions of the image forming units a, b, c, and d. Blow through holes 33a, 33b, 33c, 33d. This cools the image forming units a, b, c, and d.

  FIG. 4A is a cross-sectional view showing the configuration of the cooling mechanism 70. The cooling mechanism 70 includes a louver 41 as an “intake port”, a fan 30 as an “air blowing means”, and a guide unit 34. The louver 41 as the “intake port” sucks air. It is understood that the term “intake port” includes a configuration that is not formed by a plurality of ports such as the louver 41 but is formed by one port. The fan 30 as “air blowing means” blows air sucked from the louver 41.

  The guide portion 34 has an inclined surface 34 a that approaches the fan 30 from the louver 41. The guiding portion 34 is disposed inside the non-overlapping portion 41 b of the louver 41 and guides outside air to the fan 30. The air outside the non-overlapping portion 41 b is guided by the guide portion 34 in the order of the non-overlapping portion 41 b of the louver 41, the inclined surface 34 a, and the fan 30. The fan 30 and the inclined surface 34a (corresponding to the first inclined surface 37a and the second inclined surface 37b in the second embodiment) face the louver 41 in the air blowing direction J of the fan 30.

  With such a configuration, the guiding unit 34 takes in outside air outside the non-overlapping portion 41b more efficiently while preventing turbulent flow generated below the fan 30. Here, since the louver 41 is for guiding the outside air outside the non-overlapping part 41b to the fan 30, it has a louver shape extending in the vertical direction as shown in FIG.

  4B and 4C are partially enlarged cross-sectional views of FIG. The inclined surface 34 a has an outer end 34 a 1 as a “first end” on the louver 41 side and an inner end 34 a 2 as a “second end” on the fan 30 side.

  The outer end portion 34 a 1 is disposed on the outer side (louver 41 side) of the fan 30, that is, upstream of the upstream end 30 a of the fan 30 in the blowing direction J. The outer end portion 34a1 is disposed in the vicinity of the inside of the exterior portion 40 and in the vicinity of the lower side of the non-overlapping portion 41b.

  The inner end 34 a 2 is arranged downstream of the upstream end 30 a of the fan 30 in the blowing direction J in the blowing direction J, and is arranged upstream of the downstream end 30 b of the blowing direction J of the fan 30 in the blowing direction J. The inner end portion 34 a 2 is disposed in the vicinity of the lower surface of the fan holder 31 and is disposed between the outer end portion 31 a 1 and the inner end portion 31 a 2 on the lower surface of the fan holder 31.

  That is, the outer end portion 31a1 on the lower surface of the fan holder 31 protrudes toward the exterior portion 40 rather than the inner end portion 34a2 of the inclined surface 34a. That is, a frame extending in the air blowing direction J (a hole is not opened in the frame of the fan holder 31) is disposed between the fan 30 and the guide portion 34. The outer end portion 31a1 as the “upstream end portion” in the air blowing direction J of the frame protrudes to the louver 41 side from the inner end portion 34a2. With this configuration, it is possible to efficiently take in more outside air, and the inside of the image forming apparatus can be reliably cooled.

  Table 1 shows the measurement results of the wind speed under the following conditions. Each measurement was made 10 times, and the measured value is shown in m / sec. Condition A is the configuration of this embodiment. Condition B is a configuration in which the non-overlapping portion 41b extending downward is closed. The condition C is a configuration in which the guiding unit 34 is not present. The condition D is a configuration in which the non-overlapping portion 41b extending downward is closed and the guiding portion 34 is not present (condition B + condition C). Condition E is a configuration in a state where the inclined surface 34a is a line connecting the outer end 34a1 and the outer end 31a1, as indicated by a dotted line 34b in FIG.

The measurement environment is 21.0 ° C./46%/1011.0 hpa. Further, a voltage of 20 V is applied to the 80-square fan, the air is blown to the air passage having a cross section of 1300 mm ² formed by the upper duct 32 and the lower duct 33, and at the outlet of the hole 33d (85 mm ² ) provided in the lower duct 33, The wind speed is measured at a position 200 mm downstream from the fan 30. The wind speed was measured using Degree Controls, Inc. UAS1300 manufactured by the company is used.

  As shown in Table 1, when the louver 41 is not extended downward in the fan 30, it can be seen that there is almost no difference in the presence or absence of the guide portion 34 (comparison between condition B and condition D). It can be seen that only by extending the louver 41 in the downward direction of the fan 30, only an increase in wind speed of about 2% on average can be obtained (comparison between condition C and condition D).

  Furthermore, not only the guide portion 34 having the inclined surface 34a is provided, but also the outer end portion 31a1 of the lower surface of the fan holder 31 protrudes toward the exterior portion 40 side from the inner end portion 34a2 of the inclined surface 34a, thereby turbulent flow. Can be prevented (Comparison between Condition A and Condition E). Then, it becomes possible to increase the wind speed by about 5% as an average value (comparison between condition A and condition E).

  Compared to the case of the louver 41 that is approximately the same size as the fan 30 as in the prior art, the louver 41 is extended to provide a non-overlapping portion 41b, and the guide portion 34 is provided, so that an average wind speed of about 10% is obtained. It is possible to increase (condition A and condition B or condition D).

  As described above, the louver 41 is extended downward from the fan 30 to provide the non-overlapping portion 41b, and the guiding portion 34 having the above-described configuration is provided to efficiently blow outside air into the apparatus main body 10A. Thus, the inside of the apparatus main body 10A can be reliably cooled.

  In addition, although the guidance | induction part 34 has been arrange | positioned in a present Example, it is not restricted to this, For example, you may provide the inclined surface 34a in the fan holder 31 integrally with the fan holder 31. FIG. Further, in this embodiment, the image forming apparatus 10 is also prevented from being damaged during transportation.

  FIG. 5 is a cross-sectional view showing a cooling mechanism 70 having a stopper portion. As shown in FIG. 5, the upper duct 32, the lower duct 33, the fan holder 31, and the right side plate 18 also serve to prevent damage when the image forming apparatus 10 packed during transportation is dropped.

  In the unlikely event that the upper surface portion of the image forming apparatus 10 falls downward, an impact is applied to the upper exterior 50 via a packaging material (not shown). In this case, the stopper portion 50 a provided on the upper exterior 50 is connected to the right side plate 18 via the upper stopper portion 31 a provided on the fan holder 31 and the stopper portion 31 b provided on the lower side of the fan holder 31. The bend 18a receives an impact. The right side plate 18 is a sheet metal member, and its bent portion 18a has strength. By receiving an impact at the bent portion 18a having strength, the image forming apparatus 10 is prevented from being damaged when dropped.

  The stopper portion 50 a is a rib-shaped portion formed on the upper exterior 50, the stopper portion 31 a is a rib-shaped portion formed on the upper surface of the fan holder 31, and the stopper portion 31 b is formed on the fan holder 31. This is a rib-shaped part.

  Further, when the right side of the image forming apparatus 10 is dropped downward, the bent portion 18 a of the right side plate 18 receives an impact by the stopper portion 33 k of the lower duct 33. As described above, the impact of the strong bent portion 18a prevents the image forming apparatus 10 from being damaged when dropped.

  FIG. 6A is a side view of the image forming apparatus 100 provided with the two fans 35 and 38 according to the second embodiment. FIG. 6B is a cross-sectional view of the periphery of the portions of the fans 35 and 38 in FIG. In this embodiment, the “fan” has a first fan 35 as “first air blowing means” and a second fan 38 as “second air blowing means” at intervals. The first fan 35 is held by a first fan holder 36, and the first fan holder 36 is fixed to the right side plate 18 by a screw (not shown). The second fan 38 is held by a second fan holder 39, and the second fan holder 39 is fixed to the right side plate 18 by a screw (not shown).

  A guide portion 37 is disposed between the first fan 35 and the second fan 38. That is, the guide portion 37 is disposed between the lower side of the first fan 35 and the upper side of the second fan 38.

  As in the first embodiment, the first fan 35 cools the image forming units a, b, c, and d, and the second fan 38 cools the power supply unit 60. The louver 42 provided in the exterior part 43 is provided from the upper part of the first fan 35 to the lower part of the second fan 38. Further, as will be described later, the louver 42 guides the outside air outside the guiding portion 37 to the first fan 35 and the second fan 38, so as shown in FIG. 6A, the louver 42 extends in the vertical direction. It is.

  As shown in FIG. 6C, the guide portion 37 includes a first inclined surface 37 a on the first fan 35 side and a second inclined surface 37 b on the second fan 38 side. The first inclined surface 37 a is inclined from the louver 42 toward the first fan 35. The second inclined surface 37 b is inclined from the louver 42 toward the second fan 38.

  The first inclined surface 37a has an outer end 37a1 as a “first end” on the louver 42 side and an inner end 37a2 as a “second end” on the first fan 35 side. The outer end portion 37a1 is disposed on the outer side (louver 42 side) of the first fan 35, that is, upstream of the upstream end 60a of the fan 35 in the blowing direction J. The outer end portion 37a1 is disposed in the vicinity of the inside of the exterior portion 43 (in the vicinity of the inside of the louver 42) and in the vicinity of the apex of the non-overlapping portion 42b.

  The inner end portion 37a2 is disposed downstream of the upstream end 60a in the blowing direction J of the first fan 35 and the second fan 38 in the blowing direction J, and the downstream end of the first fan 35 and the second fan 38 in the blowing direction J. It arrange | positions upstream of the ventilation direction J rather than 60b. The inner end portion 37a2 is disposed in the vicinity of the lower surface of the first fan holder 36, and is disposed between the outer end portion 36a1 and the inner end portion 36a2 of the lower surface of the first fan holder 36. That is, the outer end portion 36a1 on the lower surface of the first fan holder 36 protrudes toward the exterior portion 43 rather than the inner end portion 37a2 of the first inclined surface 37a.

  Further, a frame extending in the air blowing direction J (a hole is not opened in the frame of the first fan holder 36) is disposed between the first fan 35 and the guide portion 37. The outer end portion 36a1 as the “upstream end portion” in the air blowing direction J of the frame protrudes to the louver 42 side from the inner end portion 37a2.

  The second inclined surface 37 b has an outer end portion 37 b 1 as a “first end portion” on the louver 42 side and an inner end portion 37 b 2 as a “second end portion” on the second fan 38 side. The outer end portion 37b1 is disposed on the outer side (louver 42 side) of the second fan 38, that is, upstream of the upstream end 60a of the fan 38 in the blowing direction J. The outer end portion 37b1 is disposed in the vicinity of the inside of the exterior portion 43 (in the vicinity of the inside of the louver 42) and in the vicinity of the apex of the non-overlapping portion 43b.

  The inner end portion 37b2 is disposed downstream of the upstream direction 60a of the first fan 35 and the second fan 38 in the blowing direction J, and is downstream of the blowing direction J of the first fan 35 and the second fan 38. It arrange | positions upstream of the ventilation direction J rather than 60b. The inner end portion 37b2 is disposed in the vicinity of the upper surface of the second fan holder 39, and is disposed between the outer end portion 39a1 and the inner end portion 39a2 on the upper surface of the second fan holder 39. That is, the outer end 39a1 on the upper surface of the second fan holder 39 protrudes toward the exterior portion 43 rather than the inner end 37b2 of the second inclined surface 37b.

  Further, a frame extending in the air blowing direction J (a hole is not opened in the frame of the second fan holder 39) is disposed between the second fan 38 and the guide portion 37. The outer end portion 39a1 as the “upstream end portion” in the air blowing direction J of the frame protrudes to the louver 42 side from the inner end portion 37b2.

  With the configuration described above, turbulence can be prevented, more outside air can be taken in efficiently, and the inside of the image forming apparatus can be reliably cooled.

  In the present embodiment, the guiding portion 37 is arranged, but the present invention is not limited to this. For example, the first fan holder 36 and the first inclined surface 37a are integrated, and the second fan holder 39 and the second inclined surface 37b are integrated. Also good. Alternatively, the guide portion 37 may be configured integrally with the first fan holder 36 or the second fan holder 39.

  According to the configuration of the first embodiment or the second embodiment, the cooling efficiency is better than the conventional one, and the generation of turbulent flow is suppressed.

30 fans (air blowing means)
34 guide part 34a inclined surface 41 louver (intake port)
70 cooling mechanism

In order to solve the above-described problems, a cooling mechanism according to the present invention includes an intake port that sucks air, a blower unit that blows air sucked from the intake port, and an inclined surface that approaches the blower unit from the intake port. A part of the air sucked from the air inlet is arranged in the order of the air inlet, the inclined surface, and the air blowing means, and is arranged between the air blowing means and the air guiding part, A frame extending in the air blowing direction, and the inclined surface has a first end portion on the intake port side and a second end portion on the air blowing means side, and the second end portion is wherein the upstream end of the air blowing direction of the blowing means is disposed downstream of the blowing direction, the upstream end of the blowing direction of air in the frame, the Rukoto than the second end portion are bulged into the intake port side Features.

In order to solve the above-described problems, a cooling mechanism according to the present invention includes an intake port that sucks air, a blower unit that blows air sucked from the intake port, and an inclined surface that approaches the blower unit from the intake port. A part of the air sucked from the air inlet is arranged in the order of the air inlet, the inclined surface, and the air blowing means, and is arranged between the air blowing means and the air guiding part, A frame extending in the air blowing direction, and the inclined surface includes a first end portion on the intake port side and a second end portion on the air blowing device side, and the air blowing device and the inclined surface. Is opposed to the air inlet in the air blowing direction of the air blowing means, and the second end portion is disposed downstream of the air blowing direction upstream of the air blowing means in the air blowing direction. The upstream end in the air blowing direction protrudes closer to the intake port than the second end. Tsu, characterized in that is.

Claims (8)

An air intake for taking in air;
A blowing means for blowing air sucked from the intake port;
A guiding portion that has an inclined surface that approaches the air blowing means from the air inlet, and in which air is guided in the order of the air inlet, the inclined surface, and the air blowing means;
With
The inclined surface has a first end portion on the intake port side and a second end portion on the air blowing means side,
The cooling mechanism according to claim 1, wherein the second end portion is disposed downstream of the upstream end of the blowing unit in the blowing direction.   2. The cooling mechanism according to claim 1, wherein the first end portion is disposed upstream of the upstream end of the air blowing unit in the air blowing direction.   The cooling mechanism according to claim 2, wherein the second end portion is disposed upstream of the downstream end of the blowing unit in the blowing direction. The air blowing means has a first air blowing means and a second air blowing means at an interval,
The cooling mechanism according to any one of claims 1 to 3, wherein the guide portion is disposed between the first air blowing unit and the second air blowing unit. The guide portion includes a first inclined surface on the first air blowing means side and a second inclined surface on the second air blowing means side,
The first inclined surface is inclined from the intake port toward the first air blowing means,
The cooling mechanism according to claim 4, wherein the second inclined surface is inclined from the intake port toward the second air blowing unit.   The cooling mechanism according to any one of claims 1 to 5, wherein the blowing unit and the inclined surface are opposed to the intake port in a blowing direction of the blowing unit. A frame extending in the air blowing direction is arranged between the blowing means and the guiding portion,
The cooling mechanism according to any one of claims 1 to 6, wherein an upstream end portion of the frame in the air blowing direction protrudes toward the intake port side with respect to the second end portion. An image forming unit for forming an image;
The cooling mechanism according to any one of claims 1 to 7,
An image forming apparatus comprising:

Images