JP2016009044A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus with a simple configuration, configured to allow a user to change an outlet to easily change a direction of discharging the air in a housing.SOLUTION: A detachable outlet outer cover 2 can be mounted on a housing 1 in different installation directions. According to the installation direction of the outlet outer cover 2, one of a first outlet 30 and a second outlet 31 of the housing 1 is opened, and the other is closed. A user can select the first outlet 30 or the second outlet 31 to discharge the air in the housing 1, by selectively mounting the outlet outer cover 2 on the housing 1. The outlet outer cover 2 can be selectively mounted on the housing 1 simply without enlarging an image forming apparatus. The user only needs to change the installation direction of the outlet outer cover 2 to be mounted on the housing 1, thereby enabling the outlet to be easily changed.

Description

  The present invention relates to an image forming apparatus such as a copying machine, a printer, and a facsimile machine that can forcibly discharge air inside the apparatus to the outside of the apparatus using a blower fan. In particular, the present invention relates to an image forming apparatus capable of selectively discharging air in the apparatus from any one of a plurality of exhaust ports.

  In an image forming apparatus such as a copying machine, a printer, or a facsimile machine, an image forming unit including a photosensitive drum, a developing sleeve, or the like, or a device such as a fixing device is driven to form an image. These devices are driven. It generates heat. And in order to prevent the malfunction of the apparatus by the temperature rise by the heat_generation | fever of these apparatuses by heat, and an apparatus by a heat | fever, a ventilation fan is provided in an apparatus, and the air in an apparatus is forced outside this apparatus by this ventilation fan ( To the outside), that is, exhausting.

  By the way, recently, an image forming apparatus is often installed near a user, and in that case, the user may feel uncomfortable by hitting air discharged from an exhaust port. In addition, due to installation space and layout, the image forming apparatus is often placed close to a wall or the like. In such a case, the wall or the like becomes an obstacle and obstructs air flow, resulting in insufficient exhaust. There is also a risk of becoming.

  Therefore, in order to solve these problems, conventionally, a plurality of exhaust ports having different discharge directions are provided in the apparatus main body, and the air in the apparatus is discharged from any one of the exhaust ports selected by the user. An image forming apparatus capable of performing the above is known. As an example, a rotatable rectifying plate is provided in an exhaust duct having a plurality of exhaust ports with different discharge directions, and the flow of air in the exhaust duct changes as the rectifier plate rotates by the user. An image forming apparatus in which the exhaust port is changed has been proposed (Patent Document 1).

JP 2005-338572 A

  However, in the device described in Patent Document 1 described above, since the flow of air in the exhaust duct needs to be changed by the rectifying plate, the rectifying plate has to be formed to a certain size. In addition, a space must be secured in the exhaust duct to such an extent that the current plate can be rotated. That is, in the conventional apparatus, an exhaust duct having a space in which a rectifying plate having a certain size can be moved must be provided in the apparatus, so that the image forming apparatus has to be enlarged.

  The present invention has been made in view of the above problems, and provides an image forming apparatus having a simple configuration in which a user can easily change the exhaust direction in which the air in the housing is discharged by changing the exhaust port. Objective.

  An image forming apparatus according to the present invention includes a housing that forms a main body of the apparatus, a blowing unit that sends air in the housing, and a downstream of the blowing unit in the blowing direction, and the air in the housing in a first direction. A first exhaust port capable of discharging air, a second exhaust port capable of discharging air in the housing in a direction different from the first direction, an opening portion and a shielding portion, and the first exhaust port The opening is positioned at an opposing position and the shielding portion is positioned at a position facing the second exhaust port, or the shielding portion is positioned at a position facing the first exhaust port and the second exhaust port. And an exhaust port selecting member that can be selectively attached to the housing so as to position the opening.

  According to the present invention, when the exhaust port selection member is selectively attached to the housing, the opening of the exhaust port selection member is positioned at either the first exhaust port or the second exhaust port, The air is discharged from either the first exhaust port or the second exhaust port. As a result, the user can change the exhaust port so that the air in the housing is discharged from either the first exhaust port or the second exhaust port only by selectively attaching the exhaust port selection member to the housing. Can be easily done. In addition, since the structure that allows the exhaust port selection member to be selectively attached to the housing is simple, the size of the apparatus need not be increased.

1 is a perspective view illustrating an appearance of an image forming apparatus according to Embodiment 1 of the present invention. It is a partially expanded view explaining an exhaust port exterior cover. 1 is a schematic cross-sectional view illustrating a main part of an image forming apparatus according to Embodiment 1 of the present invention. It is a contour figure which shows the streamline and velocity distribution which show the flow of air. It is a schematic sectional drawing explaining the principal part of the image forming apparatus which concerns on Embodiment 2 of this invention.

[Embodiment 1]
The image forming apparatus according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 4 shown here, (a) in each figure shows a case where the exhaust port exterior cover 2 is attached to the casing 1 in the first attachment direction, and (b) in each figure shows the casing 1. The case where the exhaust port exterior cover 2 is attached in the second attachment direction is shown. Further, arrows α and β shown in FIGS. 1 and 3 indicate an exhaust direction of air discharged from the inside of the housing 1 through the discharge ports (30, 31), and an arrow γ shown in FIG. 3 indicates a fan. The discharge direction of the air discharged from the motor 7 is represented.

  Here, the exhaust direction of the air discharged from the first exhaust port 30 provided downstream in the blowing direction of the fan motor 7 as the blowing means is referred to as a first direction. Further, the mounting direction of the exhaust port exterior cover 2 that discharges the air in the housing in the first direction, in other words, the mounting direction of the exhaust port exterior cover 2 that discharges the air in the housing from the first exhaust port 30 is set to the first direction. This is called the mounting direction. Further, the mounting direction of the exhaust port exterior cover 2 that discharges air in the housing in a direction different from the first direction, in other words, the mounting direction of the exhaust port exterior cover 2 that discharges air in the housing from the second exhaust port 31 is set. Called the second mounting direction.

  The image forming apparatus shown in FIG. 1 is, for example, a copying machine, a printer, a facsimile machine, various printing machines, a multifunction machine, or the like. In the image forming apparatus, a large number of components that form an image forming apparatus such as an image forming unit and a fixing device (not shown) are arranged in a housing 1 that forms the apparatus main body. Since there is no figure, illustration and description are omitted.

  As shown in FIG. 1, the housing 1 is covered with a plurality of panel-shaped exterior covers (panels) 8 and 9, for example. In this image forming apparatus, the exterior cover 8 that forms the first side surface portion is provided so that the exterior cover 9 that forms the second side surface portion intersects with the exterior cover 8 via the corner portion 1a. Yes. The exterior covers 8 and 9 are provided with exhaust ports (30 and 31), respectively. The exterior cover 8 is formed with a first exhaust port 30 penetrating the inside of the housing 1 and the outside, and the exterior cover 8 has a second exhaust port 31 communicating the inside of the housing 1 and the outside. 30 is formed in a continuous manner. That is, the 1st exhaust port 30 and the 2nd exhaust port 31 are penetrated and formed in the housing | casing 1 in the state which continued in the corner | angular part 1a vicinity. Thus, the housing 1 is provided with the first exhaust port 30 and the second exhaust port 31 that can discharge the air in the housing 1 to the outside.

The casing 1 is configured such that an exhaust port exterior cover 2 as an exhaust port selection member can be detachably attached to a side surface thereof. The exhaust port exterior cover 2 is formed in a bent shape having two surfaces along the exterior cover 8 (first side surface portion) and the exterior cover 9 (second side surface portion) through the corner portion 1a, and is opened on one surface. The part 2a is provided with a blocking part 2b as a shielding part on the other surface. Exhaust port outer cover 2, for example, the opening area of the opening 2a in 3500 mm ^2, the area of the frame also including an opening portion 2a entire region in 6400Mm ^2, closing portion 2b is formed on 6400Mm ^2.

  The exhaust port exterior cover 2 can be attached to the housing 1 by changing the attachment direction to either the first attachment direction or the second attachment direction. In the first mounting direction and the second mounting direction, the direction of the exhaust port exterior cover 2 is changed by 180 degrees, and according to this, either the first exhaust port 30 or the second exhaust port 31 is opened. The other is closed. That is, the inside of the housing 1 and the outside can be communicated with each other by only one of the first exhaust port 30 and the second exhaust port 31.

  More specifically, when the exhaust port exterior cover 2 is mounted in the first mounting direction, the opening 2a is formed in the first exhaust port 30 as shown in FIGS. 1 (a) and 2 (a). Is positioned, and the closing portion 2 b is positioned at the second exhaust port 31. That is, since the first exhaust port 30 is in the open state and the second exhaust port 31 is in the closed state, the air in the housing 1 is discharged from the first exhaust port 30 (the exhaust direction is the direction of the arrow α in the figure). Become).

  On the other hand, when the exhaust port exterior cover 2 is mounted in the second mounting direction, the opening 2a is positioned at the second exhaust port 31, as shown in FIGS. 1 (b) and 2 (b). The closing portion 2 b is positioned at the first exhaust port 30. That is, since the second exhaust port 31 is opened and the first exhaust port 30 is closed, the air in the housing 1 is discharged from the second exhaust port 31 (the exhaust direction is the first exhaust port 30). The direction of the arrow β in the figure intersects with the exhaust direction of.

  As described above, in this image forming apparatus, it is possible to select to discharge the air in the housing 1 from either the first exhaust port 30 or the second exhaust port 31 depending on the mounting direction of the exhaust port exterior cover 2. It has become. That is, the exhaust port is selected depending on the mounting direction of the exhaust port exterior cover 2, and the exhaust direction is determined to be either the first direction or the direction intersecting the first direction.

  As shown in FIG. 2, the exterior cover 8 and the exterior cover 9 are provided with a large number of exhaust ports 22 in addition to the first exhaust port 30 and the second exhaust port 31, and the exhaust ports 22 have louvers. Is provided. A large number of fan motors (not shown) are provided in the housing 1, and the air sent by these fan motors passes through the housing 1 with heat from the exhaust ports (30, 31, 22). Discharged. The number of fan motors is not limited to one, and many fan motors are generally provided to efficiently cool the inside of the housing 1.

  The amount of air (exhaust air volume) and temperature (exhaust air temperature) sent by a large number of fan motors and exhausted from the exhaust ports (30, 31, 22) can be different for each exhaust port (30, 31, 22). . In this image forming apparatus, the exhaust port exterior cover 2 can be attached to the first exhaust port 30 and the second exhaust port 31 that have a larger exhaust air volume and higher exhaust temperature than the other exhaust ports 22. Yes.

  As described above, the exhaust port exterior cover 2 can be detachably attached to the housing 1. Therefore, for example, a claw-like or hook-like fitting member 10 is provided at both longitudinal ends of the exhaust port exterior cover 2, and a recess (not shown) that can be fitted to the fitting member 10 is provided in the housing 1. ing. By fitting the fitting member 10 into the recess on the housing 1 side, the exhaust port exterior cover 2 is attached to the housing 1 (referred to as a snap-fit method). According to this method, the user can easily attach the exhaust port exterior cover 2 to the housing 1 in different attachment directions. Of course, the method is not limited to the snap-fit method, and other methods may be used as long as the user can easily attach the exhaust port exterior cover 2 to the housing 1 in different mounting directions.

  As shown in FIG. 3, a metal inner cover 3 is provided in the housing 1 at a position facing the first exhaust port 30 and the second exhaust port 31. The inner cover 3 has a first vent 3 a at a position facing the first exhaust port 30 on the discharge direction of the fan motor 7 and a second vent 3 b at a position facing the second exhaust port 31. doing. A board 4 (for example, an electronic board) on which an electronic component 5 that is weak against heat, a member to be cooled 6 that self-heats, or the like is mounted can be disposed further inside the housing 1 than the inner cover 3. Yes. The electronic component 5 and the member 6 to be cooled on the substrate 4 are cooled by the air sent by the fan motor 7 (that is, cooling by an air cooling method by convection heat transfer).

  When the exhaust port exterior cover 2 is mounted in the first mounting direction, a path in which air in the housing 1 flows in the exhaust direction indicated by the arrow α (referred to as a first exhaust path) as shown in FIG. Is formed. In this case, the air sent by the fan motor 7 passes through the electronic component 5 and the substrate 4 having the member 6 to be cooled, cools them, and then passes through the first vent 3a of the inner cover 3 to the first exhaust port. It reaches 30 and is discharged from there.

  On the other hand, when the exhaust port exterior cover 2 is mounted in the second mounting direction, the path in which the air in the housing 1 flows in the exhaust direction indicated by the arrow β as shown in FIG. Called) is formed. In this case, the air sent by the fan motor 7 passes through the electronic component 5 and the substrate 4 having the member 6 to be cooled, cools them, and then passes through the second vent 3b of the inner cover 3 to the second exhaust port. It reaches 31 and is discharged from there. However, unlike the case where the exhaust port exterior cover 2 is mounted in the first mounting direction, the air changes its direction at the closed portion 2b of the exhaust port outer cover 2 after cooling the substrate 4 and moves toward the second vent port 3b. Flowing.

  Incidentally, although not shown in FIG. 3, the upstream side of the fan motor 7 is connected to an air inlet (not shown) communicating with the outside via a space in the housing 1, and the air sucked from the air inlet is a fan. It is sent to various places in the housing 1 via the motor 7. Therefore, the amount of air flowing through the first exhaust path or the second exhaust path described above is determined by the balance of the amount of air blown by another fan motor (not shown) provided in the housing 1. That is, since the fan motor uses the air sucked into the housing 1, the amount of air per unit time that can be simultaneously sent by a large number of fan motors is limited. For this reason, when the blown air amount of a certain fan motor changes, the other fan motors are also affected and the blown air amount changes. Then, although the amount of air flowing through the various places in the housing 1 changes, a change in the air amount in various places in the housing 1 is not desirable because it may cause a local temperature increase.

  In the present image forming apparatus, the amount of air flowing through various places in the housing 1 is not changed by the selection of the exhaust port. In other words, as described above, when the exhaust port exterior cover 2 is mounted in a different orientation, the path through which the air sent from the fan motor 7 flows is changed to either the first exhaust path or the second exhaust path. . When the path through which air flows is changed, the amount of air blown by the fan motor 7 changes. This can occur because the ventilation resistance for each path differs depending on the selection of the exhaust port. Therefore, in this image forming apparatus, the ventilation resistance of the entire path is set to be substantially the same so that the ventilation resistance for each path does not vary depending on the selection of the exhaust port. For this purpose, the inner cover 3 is formed with a first vent 3a and a second vent 3b whose opening areas are adjusted in advance.

In the present image forming apparatus, the opening area of the first vent 3a formed at a position facing the first exhaust port 30 is set to the opening area of the second vent 3b formed at a position facing the second exhaust port 31. Smaller than that. The opening area of the first vent 3a is set so that the path cross-sectional area is minimized in the first exhaust path, and the opening area of the second vent 3b is set so that the path cross-sectional area is minimized in the second exhaust path. Has been. For example, when the path sectional area in the first and second exhaust path is generally 6400mm ^2, the first vent 3a in opening area 1920 mm ^2, the second vent 3b are formed respectively in the opening area 3200 mm ^2.

  In the image forming apparatus, air can flow more linearly in the first exhaust path than in the second exhaust path. For this reason, if the opening area of the first vent 3a and the opening area of the second vent 3b are equal, the second exhaust path has a smaller ventilation resistance than the first exhaust path, and air flows more easily. Therefore, the opening area of the first vent 3a is made smaller than the opening area of the second vent 3b, so that the ventilation resistance of the first exhaust path is increased compared to the case where the inner cover 3 is not provided. Thereby, the ventilation resistance of the whole path | route of a 1st exhaust path and a 2nd exhaust path is set substantially the same. If it carries out like this, when the exhaust port exterior cover 2 is attached by the 1st attachment direction, the amount of exhaust air discharged | emitted from the 1st exhaust port 30, and the case where the exhaust port exterior cover 2 is attached by the 2nd attachment direction The exhaust air volume discharged from the second exhaust port 31 can be made substantially the same.

Here, FIG. 4 shows the result of airflow analysis in the housing 1 of the image forming apparatus. FIG. 4 is a contour diagram showing streamlines and velocity distribution showing the flow of air. Stream lines are indicated by alternate long and short dash lines (see R1 and R2), and velocity distribution is indicated by dotted lines. As a result of the air flow analysis shown in FIG. 4, the opening area of the first vent 3a of the inner cover 3 is 3200 mm ² , the opening area of the second vent 3b is 1920 mm ² , that is, the ratio of the opening areas is 3: 5. Is set to. As shown in FIGS. 4A and 4B, the amount of exhaust air discharged from the first exhaust port 30 and the amount of exhaust air discharged from the second exhaust port 31 are substantially the same. It could be confirmed. Moreover, it has confirmed that the velocity distribution of the air discharged | emitted from the 1st exhaust port 30 or the 2nd exhaust port 31 is substantially the same. Of course, it was confirmed that the exhaust direction was changed by changing the mounting direction of the exhaust port exterior cover 2.

  As described above, in the present image forming apparatus, the detachable exhaust port exterior cover 2 is provided with respect to the housing 1 by changing the mounting direction. Then, according to the mounting direction of the exhaust port exterior cover 2, either the first exhaust port 30 or the second exhaust port 31 of the housing 1 is opened and the other is closed. Either one exhaust port 30 or the second exhaust port 31 communicates the inside of the housing 1 with the outside. As a result, the user exhausts the air in the housing 1 from either the first exhaust port 30 or the second exhaust port 31 only by selectively attaching the exhaust port exterior cover 2 to the housing 1. You can change your mouth. The structure that allows the exhaust port exterior cover 2 to be selectively attached to the housing 1 is simple, and there is no need to secure a space in the housing 1 for changing the exhaust port as in the prior art. Therefore, this can be realized without increasing the size of the image forming apparatus. Further, the user can easily change the exhaust port in order to change the exhaust direction of the air in the housing 1. Furthermore, it is difficult for the user to lose the exhaust port exterior cover 2.

  In this image forming apparatus, the inner cover 3 is provided in the housing 1, the first vent 3 a and the second vent 3 b are formed in the inner cover 3 with different opening areas, and the exhaust vent outer cover 2 is formed. The ventilation resistances of the first exhaust path and the second exhaust path, which are determined by the mounting direction, are made substantially the same. Thereby, even if the attachment direction of the exhaust port exterior cover 2 is changed, the amount of air passing through the first exhaust path or the second exhaust path does not change. Therefore, the amount of air flowing through various places in the housing 1 does not change, so that the operation of the apparatus is not affected.

[Embodiment 2]
Next, an image forming apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view illustrating the main part of the image forming apparatus according to the second embodiment of the present invention. FIG. 5A shows the case where the exhaust port exterior cover 2 is attached to the housing 1 in the first mounting direction, and FIG. 5B shows the second attachment of the exhaust port exterior cover 2 to the housing 1. The case where it is installed in the direction is shown. The arrows α and β shown in FIG. 5 indicate the exhaust direction of the air discharged from the housing 1 through the discharge ports (30, 31), and the arrow γ indicates the discharge direction of the air discharged from the fan motor 7. Represents. Further, an arrow δ represents a blowing direction in which air flows in the vicinity of the first exhaust port 30. As shown in FIG. 5, the image forming apparatus according to the second embodiment differs from the image forming apparatus according to the first embodiment described above (see FIG. 3) in the first position at a position deviating from the discharge direction of the fan motor 7. An exhaust port 30 is provided. Therefore, the air discharged from the fan motor 7 once flows in the direction of the arrow δ and then flows toward the first exhaust port 30 or the second exhaust port 31.

  Similar to the image forming apparatus according to the first embodiment, the image forming apparatus according to the second embodiment is provided with a metal inner cover 3 in the housing 1. A port 3a and a second vent 3b are provided. However, unlike the image forming apparatus according to the first embodiment, the first vent 3a and the second vent 3b are formed to have the same opening area. A substrate 4 on which the electronic component 5 and the member to be cooled 6 are mounted is disposed inside the inner cover 3.

  A louver 2 c is provided in the opening 2 a of the exhaust port exterior cover 2. The louver 2c changes the flow direction of the air discharged from the exhaust ports (30, 31). In the image forming apparatus according to the second embodiment, as shown in FIG. 5A, when the exhaust port exterior cover 2 is mounted in the first mounting direction, air flows in the vicinity of the first exhaust port 30. A louver 2c is provided in a direction that obstructs the direction (arrow δ).

  When the exhaust port exterior cover 2 is mounted in the second mounting direction, as shown in FIG. 5 (b), the air flow direction from the second exhaust port 31 does not hinder the direction in which air flows in the vicinity of the second exhaust port 31. Discharged. The second exhaust path (path connecting γ, δ, β) shown in FIG. 5B is more suitable for the louver 2c than the first exhaust path (path connecting γ, δ, α) shown in FIG. Air easily flows along the slope. In other words, the influence of the inclined louver 2c on the ventilation resistance is greater in the first exhaust path than in the second exhaust path. The louver 2c is provided so as to be so. If it carries out like this, each ventilation resistance of a 1st exhaust path and a 2nd exhaust path will be adjusted with the mounting direction of the exhaust port exterior cover 2. FIG. Here, the inclination angle of the louver 2c is set so that the ventilation resistances of the first exhaust path and the second exhaust path are substantially the same.

  That is, in the image forming apparatus according to the second embodiment, air can flow more linearly in the first exhaust path than in the second exhaust path. And the opening area of the 1st vent 3a and the opening area of the 2nd vent 3b are formed equally. Therefore, the second exhaust path has a smaller ventilation resistance and the air flows more easily than the first exhaust path. Therefore, the inclination of the louver 2c is set so as to increase the ventilation resistance of the first exhaust path when the exhaust port exterior cover 2 is mounted in the first mounting direction. If it carries out like this, the amount of exhaust air discharged | emitted from the 1st exhaust port 30 when the exhaust port exterior cover 2 is attached in the 1st attachment direction, and the case where the exhaust port exterior cover 2 is attached in the 2nd attachment direction The amount of exhaust air discharged from the second exhaust port 31 can be made substantially the same.

  As described above, also in the image forming apparatus according to the second embodiment, depending on the mounting direction of the exhaust port exterior cover 2, either the first exhaust path or the second exhaust path can be opened and the other can be closed. it can. In the image forming apparatus according to the second embodiment, the louver 2c is provided in the opening 2a of the exhaust port exterior cover 2 so that the ventilation resistances of the respective exhaust paths are substantially the same. Thereby, the same effect as the image forming apparatus according to the first embodiment described above can be obtained. That is, it is not necessary to increase the size of the apparatus, and the user can easily change the exhaust port in order to change the exhaust direction of the air in the housing 1. Furthermore, since the amount of air flowing through various places in the housing 1 does not change, the apparatus can be stably operated.

  In the above-described embodiments, the first exhaust port 30 and the second exhaust port 31 are formed so as to penetrate the housing 1 in the vicinity of the corner portion 1a. However, the present invention is not limited to this. For example, the first exhaust port 30 and the second exhaust port 31 may have a connecting portion or the like in the middle, and may not necessarily be formed through in a continuous state. Further, the first exhaust port 30 and the second exhaust port 31 may be formed at opposite positions on the same straight line, that is, at the opposing side surface portions of the housing 1. Or the 1st exhaust port 30 and the 2nd exhaust port 31 do not need to be formed in the same height position of the housing | casing 1, and may be shifted and formed in a different height position. In short, depending on the mounting direction of the exhaust port exterior cover, either the first direction or a direction different from the first direction, such as the crossing direction described above, the opposite direction on the same straight line, the direction in a twisted relationship, etc. It is only necessary that the air in the housing 1 can be discharged from either one.

DESCRIPTION OF SYMBOLS 1 ... Housing | casing, 1a ... Corner | angular part, 2 ... Exhaust port exterior cover, 2a ... Opening part, 2b ... Closure part 2c ... Louver, 3 ... Inner cover, 3a ... 1st ventilation port, 3b ... 2nd ventilation port 7 ... Fan motor, 8, 9 ... exterior cover, 30 ... first exhaust port, 31 ... second exhaust port

Claims (9)

A housing forming the apparatus body;
A blowing means for sending air in the housing;
A first exhaust port provided downstream of the blowing means in the blowing direction and capable of discharging the air in the housing in a first direction;
A second exhaust port capable of discharging the air in the housing in a direction different from the first direction;
An opening portion and a shielding portion, wherein the opening portion is positioned at a position facing the first exhaust port and the shielding portion is positioned at a position facing the second exhaust port, or the first exhaust port An exhaust port selecting member that can be selectively attached to the housing so that the shielding portion is positioned at a position opposite to the second exhaust port and the opening is positioned at the second exhaust port. The housing includes a first side surface portion and a second side surface portion that intersects the first side surface portion and continues to the first side surface portion via a corner portion, and the first side surface portion includes the first side surface portion. Providing the second exhaust port on the second side surface,
The image forming apparatus according to claim 1, wherein the exhaust port selection member is formed in a shape along the first side surface portion and the second side surface portion via the corner portion.   The image forming apparatus according to claim 2, wherein the first exhaust port and the second exhaust port are continuously opened.   The exhaust port selection member can be mounted by changing the mounting direction between a first mounting direction and a second mounting direction, and in the case of the first mounting direction, the opening portion faces the first exhaust port. 4. The image forming apparatus according to claim 1, wherein the opening is opposed to the second exhaust port in the second mounting direction. 5. An inner cover provided in the housing to face the first exhaust port and the second exhaust port;
The inner cover has a first ventilation port at a position facing the first exhaust port and a second ventilation port at a position facing the second exhaust port, and is on the air discharge direction of the blowing means. 5. The image forming apparatus according to claim 1, wherein the first ventilation port has an opening area smaller than that of the second ventilation port.   The air volume exhausted from the first exhaust port when the opening of the exhaust port selection member faces the first exhaust port, and the first when the opening opposes the second exhaust port. The image forming apparatus according to claim 5, wherein the first ventilation port and the second ventilation port are formed so that an air volume of air discharged from the two exhaust ports is substantially the same.   The image forming apparatus according to claim 1, wherein a louver that changes a flow direction of the discharged air is provided at an opening of the exhaust port selection member.   The inclination of the louver is changed between the case where the opening of the exhaust port selection member faces the first exhaust port and the case where the opening faces the second exhaust port. The image forming apparatus according to claim 7.   The air volume exhausted from the first exhaust port when the opening of the exhaust port selection member faces the first exhaust port, and the first when the opening opposes the second exhaust port. 9. The image forming apparatus according to claim 7, wherein the inclination of the louver is set so that the air volume of the air discharged from the two exhaust ports is substantially the same.

Images