JP7690367B2 - Filter casing and filter housing - Google Patents

Description

The present invention relates to a filter casing that houses an air filter, and a filter housing.

An air filter may be used to purify the air discharged from an air conditioner. The air filter is attached to a specified mounting position within the casing and housed within the casing. The casing (filter housing) housing the air filter is attached to the outside of the air conditioner, for example, so as to cover the exhaust port of the air conditioner. The conditioned air discharged from the air conditioner is taken into the casing and purified by passing through the air filter.

The air filter in the filter housing needs to be airtightly attached at the installation position so that air taken into the casing is not discharged outside the casing without passing through the air filter. Patent Document 1 describes a method in which a pressure bar made by bending a steel plate into a U-shaped cross section is rotated to press the air filter against the inner wall of the casing in the direction of the air flow. A handle is connected to the pressure bar for rotating the pressure bar in the direction in which it extends.

JP 2006-35084 A

When dust accumulates on the filter media during use, the filter's collection performance decreases. For this reason, in order to continue using the air filter, the filter media must be cleaned or replaced periodically, and the air filter is inserted and removed from the casing during this process. However, the member or handle that presses the air filter against the casing may get into the space inside the casing that serves as the air filter's passageway, interfering with the insertion and removal of the air filter. Even if the handle is operated in advance prior to inserting or removing the air filter so that these members and handle are positioned outside the space, contact or vibration between the air filter and the casing during operation may cause the pressing member or handle to rotate under its own weight and enter the space.

In particular, large, heavy air filters are inserted and removed from the casing by workers holding them with both hands, so if the parts or handles that press the air filter get into the space that the air filter passes through, it becomes necessary to lower the air filter and operate the handle in order to remove these parts and handles from the space, which makes the work difficult to carry out smoothly. In addition, the air filter is inserted and removed from the casing that is attached externally to the top of the air conditioner at a relatively high altitude, so the work takes extra time if care is taken to prevent the air filter from falling.

The objective of the present invention is to provide a filter casing and filter housing that are easy to maintain for air filters.

One aspect of the present invention is a filter casing configured to guide an air filter to a predetermined mounting position and allow air taken in from the outside to pass through the air filter mounted at the mounting position.
The filter casing comprises:
a receiving portion for receiving the air filter at the mounting position;
a pressing mechanism provided to sandwich an installation space corresponding to the installation position among the spaces within the casing that serve as a passage for the air filter guided to the installation position, between the receiving part and the pressing mechanism, the pressing mechanism having an operated part and a pressing member configured to press the air filter against the receiving part by operating the operated part, thereby attaching the air filter, the pressing mechanism configured such that a part of the operated part or the pressing member enters into the space by the weight of the operated part or the pressing member;
The present invention is characterized in that it is provided with a mounting portion configured to prevent the operated portion or the portion of the pressing member from entering the space by placing the portion of the pressing member outside the space.

the pressing mechanism further includes a drive shaft extending in a depth direction of the casing parallel to a moving direction of the air filter guided within the space, the drive shaft being connected to the operated portion and the pressing member so as to rotate integrally with the operated portion and the pressing member, the drive shaft being movable in the depth direction and rotatable around a center line of the drive shaft,
the pressing mechanism is configured such that, when the drive shaft is positioned at a first depth direction position, the pressing member rotates about the center line and is able to press the air filter,
It is preferable that the mounting portion is configured so that the pressing member is placed on the mounting portion by positioning the pressing member at a predetermined rotational position and the drive shaft at a second depth direction position different from the first depth direction position.

the pressing member has a portion that extends away from the drive shaft and a portion that extends in a horizontal direction when the pressing member is located at the rotational direction position,
It is preferable that the mounting portion has a horizontal mounting surface 50a that supports the portion from below.

It is preferable that the casing further includes a stop portion configured to prevent the pressing member from rotating beyond a rotational position for pressing the air filter by contacting the pressing member from a direction opposite to the rotational direction of the pressing member when pressing the air filter.

The casing comprises:
A pair of walls are provided on both sides of the pressing member in the depth direction so as to be perpendicular to the depth direction, and are configured to support rotation of the drive shaft;
two protrusions each extending from a portion of a first wall portion on both sides of the center line of the first wall portion at a position below the drive shaft toward a second wall portion opposed to the first wall portion, the two protrusions functioning as the placement portion and the stop portion;
Preferably, the frame has a

a distance in the depth direction between the protruding portion that functions as the placement portion and the second wall portion is greater than a length of the pressing member in the depth direction;
It is preferable that a distance in the depth direction between the protruding portion functioning as the stop portion and the second wall portion is narrower than a length of the pressing member in the depth direction.

the operated unit is disposed on a front side of the frame in the depth direction,
It is preferable that the casing further comprises an attachment device that is removably attached to the frame, and that the attachment device is arranged on the side where the operated part rotates to release the pressure, relative to the operated part that is located at a rotational position corresponding to the rotational position of the pressing member pressing the air filter, so as to prevent rotation of the operated part that would release the pressure on the air filter.

It is preferable that the mounting device is configured to prevent the air filter from slipping out of the mounting space by contacting the air filter from the front side in the depth direction in the mounting space.

One aspect of the present invention is a filter housing.
The filter housing is
The filter casing;
an air filter guided to an attachment position within the casing and attached to the attachment position;
the casing has a guide portion including a receiving portion that receives the air filter at the mounting position, the guide portion being formed in the casing along a passage of the air filter that is guided to the mounting position and configured to contact the air filter to receive the air filter and guide it to the mounting position,
The air filter is characterized in that a member made of a fluorine-based resin material is provided at a portion that contacts the guide portion.

The filter casing and filter housing described above provide excellent maintainability for the air filter.

1 is an external view showing a filter housing according to an embodiment with a portion of a casing omitted. 10A is a diagram illustrating guiding an air filter to an attachment position, and FIGS. 10B and 10C are diagrams illustrating pressing of the air filter. FIG. 13 is a top view showing the position where the air filter is pressed by the pressing member; FIG. 13 is a front view showing the positional relationship between the pressing member, the placement portion, and the stopping portion. FIG. 13 is a perspective view showing the positional relationship between a pressing member, a placement portion, and a stopping portion, with a part of the frame omitted. FIG. FIG. 4 is a perspective view showing the positional relationship between the mounting fixture and an operated member.

The filter casing and filter housing of the embodiment are described below.

(Casing for filter)
Fig. 1 is an external view showing a filter housing 80 with a part omitted from a filter casing (hereinafter simply referred to as a casing) 1. Fig. 2(a) is a diagram for explaining the guidance of an air filter 100 to an attachment position.

The casing 1 is configured to guide the air filter 100 to an installation position within the casing 1 and allow air taken in from the outside to pass through the air filter 100 installed at the installation position. The installation position is the position within the casing 1 where the air filter 100 is located in Figure 1 and Figures 2(b) and (c) which will be referred to later.

The casing 1 is preferably a housing having an approximately rectangular parallelepiped outer shape and a hollow interior. The casing 1 is made, for example, by combining metal plate materials and parts. The casing 1 has an outlet (see FIG. 2(a)) for inserting and removing the air filter 100 when cleaning the air filter 100 and replacing the filter material (described later) (maintenance), an intake port (not shown) through which air is taken in from the outside, and an exhaust port (not shown) through which air that has passed through the air filter 100 is exhausted. The outlet is provided, for example, with an openable door. In the casing 1 shown in FIG. 1, the intake port is provided, for example, in the part of the casing 1 that forms the bottom surface of the rectangular parallelepiped, and the exhaust port is provided, for example, in the part of the casing that forms the top surface of the rectangular parallelepiped.

The casing 1 comprises a receiving portion 10, a pressing mechanism 30, and a mounting portion 50 (see Figures 4 and 6).

The receiving part 10 is the part that receives the air filter 100 at the mounting position. In FIG. 1, the receiving part 10 is made of a rectangular support base that is placed at the bottom inside the casing 1. The support base has a shape that extends around the outer periphery of the rectangle when viewed from above, and is open on the inner periphery side, so that it supports the outer periphery of the air filter 100 (the outer frame described below) from below, while allowing the air taken in from the intake port to pass through the filter material (described below) of the air filter 100.

In addition to Fig. 1, Figs. 2(b) and 2(c), 3 and 4 also show the pressing mechanism 30. Note that in Fig. 2(a), the pressing mechanism 30 is omitted. Fig. 3 is a top view showing the position where the air filter 100 is pressed by the pressing member 33 of the pressing mechanism 30, which will be described later. Fig. 4 shows a cross section of the pressing mechanism 30 perpendicular to the depth direction (Z direction).

The pressing mechanism 30 is a mechanism that is provided to sandwich the mounting space S' (see FIG. 2(a)) corresponding to the mounting position among the space S in the casing 1 that serves as a passage for the air filter 100 guided to the mounting position, between the receiving part 10. The depth direction of the casing 1 is a direction (Z direction) parallel to the movement direction of the air filter 100 guided within the space S. In the casing 1 shown in FIGS. 1 and 3, two pressing mechanisms 30 are provided, one on each side of the width direction (Y direction) of the casing 1 that is perpendicular to the depth direction (Z direction).

The pressing mechanism 30 has an operated part 31 and a pressing member 33.

The operated part 31 is a part that an operator operates when pressing or releasing the air filter 100 by the pressing mechanism 30, and functions as a lever. The operated part 31 is not shown in FIG. 3.

The pressing member 33 is a member configured to press the air filter 100 against the receiving part 10 by operating the operated part 31, thereby attaching the air filter 100. In FIG. 1, two pressing members 33 are arranged at an interval in the depth direction (Z direction). When viewed in the depth direction (Z direction) between the two pressing mechanisms 30, the rotation direction of the drive shaft 35 (described later) and the shape of the pressing member 33 (described later) are symmetrical with respect to the center of the width direction (Y direction) of the attachment position.

The pressing mechanism 30 preferably further includes a drive shaft 35. The drive shaft 35 is a rod-shaped portion extending in the depth direction (Z direction) of the casing 1. The drive shaft 35 is connected to each of the operated portion 31 and the pressing member 33 so as to rotate together with the operated portion 31 and the pressing member 33. The operated portion 31 is connected to the front end of the drive shaft 35 and extends away from the center line of the drive shaft 35. The center line of the drive shaft 35 is a line passing through the center of the cross section of the drive shaft 35 perpendicular to the extension direction of the drive shaft 35. The pressing member 33 shown in FIG. 4 is a member made by bending a steel plate, for example, so as to have an extension portion 33a and a pressing portion 33b. Note that FIG. 4 shows the pressing mechanism 30 provided on the right side of the pressing mechanisms 30 on both sides in the width direction (Y direction) when viewed in the depth direction (Z direction). The extension portion 33a is a portion that extends away from the drive shaft 35. The extension portion 33a is preferably a portion that extends in a substantially horizontal direction by the pressing member 33 being positioned at a predetermined rotational position around the center line, as shown in FIG. 4(a). The distance between the pressing portion 33b and the center of the drive shaft 35 is longer than the distance between the air filter 100 and the center of the drive shaft 35 in a release state described below. As a result, in a pressing state described below in FIG. 4(b), the pressing mechanism 30 presses the outer periphery of the air filter 100 downward via the pressing portion 33b, and presses the air filter 100 against the receiving portion 10. As shown in FIG. 3, the pressing members 33 are arranged at four locations corresponding to the four corners of the outer periphery of the air filter 100, one at each, and press the outer periphery of the air filter 100 against the receiving portion 10 with a uniform force in the circumferential direction.

The drive shaft 35 is movable in the depth direction (Z direction) and can rotate around the center line of the drive shaft 35. The pressing mechanism 30 is configured such that, when the drive shaft 35 is positioned at a first depth direction position, the pressing member 33 rotates around the center line and can press the air filter 100. The first depth direction position is a depth direction (Z direction) position where the pressing member 33 can rotate around the drive shaft 35, as shown in Figures 2(b) and 2(c). The pressing mechanism 30 can take a release state shown in Figures 2(b) and 4(a) and a pressing state shown in Figures 2(c) and 4(b) depending on the rotational position of the pressing member 33.

The pressing mechanism 30 is configured such that the weight of the operated part 31 or the pressing member 33 enters the space S due to the drive shaft 35 being located at the first depth direction position. In the pressing mechanism 30 shown in FIG. 4, the operated part 31 and the pressing part 33b of the pressing member 33 are located in an overlapping azimuth direction with respect to the drive shaft 35. Therefore, even if the operated part 31 and the pressing part 33b are located above the drive shaft 35 and outside the space S, the drive shaft 35 is easily rotated by its own weight when an impact or vibration acts on the casing 1, and the operated part 31 and the pressing part 33b enter the space S. In the pressing mechanism 30 shown in FIG. 4, the operated part 31 enters the space S, and the pressing part 33b enters the mounting space S'.

5 omits a part of the frame 40 (a second wall portion 42 described later) to show the placement portion 50 and a stop portion (described later) 60. Note that the operated portion 31 of the pressing mechanism 30 is omitted in FIG. 5 .
The mounting portion 50 is configured so that a part of the pressing member 33 (pressing portion 33b) is placed outside the space, thereby preventing a part of the operated portion 31 (the part including the end opposite the drive shaft 35) or a part of the pressing member 33 (pressing portion 33b) from entering the space S.

The mounting section 50 is preferably configured such that the pressing member 33 is placed on the mounting section 50 by positioning the pressing member 33 at a predetermined rotational position and the drive shaft 35 at a second depthwise position different from the first depthwise position. The drive shaft 35 can move in the depth direction (Z direction) between the first depthwise position and the second depthwise position by positioning the pressing member 33 at the rotational position shown in FIG. 4(a). At the second depthwise position, the rotation of the drive shaft 35 is restricted. The mounting section 50 preferably has a horizontal mounting surface 50a that supports the extension portion 33a from below, as shown in FIG. 5.

When attaching the air filter 100 to the casing 1, the door of the outlet of the casing 1 is opened, and with the drive shaft 35 of the pressing mechanism 30 positioned at the first depth direction position, the operated part 31 is operated to position the pressing member 33 at the above-mentioned predetermined rotation direction position, and the drive shaft 35 is further pushed in the depth direction to move it to the second depth direction position, thereby placing the pressing member 33 on the placement part 50. As a result, the pressing member 33 and the operated part 31 are positioned outside the space S. In this state, even if the air filter 100 comes into contact with the casing 1 or vibrations are transmitted from the air conditioning device, the pressing member 33 and a part of the operated part 31 are prevented from entering the space S due to their own weight, so that the air filter 100 can be smoothly moved in the depth direction from the outlet to the attachment position. After the air filter 100 has been moved to the mounting position, the operated portion 31 is operated to pull out the drive shaft 35 and move it from the second depth direction position to the first depth direction position, and the pressing member 33 is rotated to the rotational position shown in Figures 2(c) and 4(b) to press the pressing member 33 against the air filter 100. In this way, the air filter 100 is mounted at the mounting position.

On the other hand, when removing the air filter 100, the operated portion 31 is operated to release the pressing mechanism 30, and the pressing member 33 is positioned in a predetermined rotational position as shown in Figs. 2(b) and 4(a), and the drive shaft 35 is further pushed in to move it from the first depth direction position to the second depth direction position, and the pressing member 33 is placed on the placement portion 50. In this state, as described above, the pressing member 33 and a part of the operated portion 31 are prevented from entering the space S due to their own weight, so that the air filter 100 can be smoothly pulled out from the mounting position and removed from the removal opening.

The above casing 1 makes it easy to clean the air filter 100 and replace the filter material, making it easy to maintain.

The casing 1 is attached to the outside of the air conditioner. The air conditioner is, for example, a type of device called a vertical or upright type, in which the longitudinal direction of the air conditioner is parallel to the vertical direction. This type of air conditioner generally has an exhaust port at the top for discharging conditioned air, and the casing 1 is installed on the top surface (ceiling surface) of the air conditioner near the exhaust port. A duct extending to the intake port of the casing 1 is connected to the exhaust port of the air conditioner, and air whose temperature, humidity, volume, etc. have been adjusted is taken into the casing 1. The air conditioner is equipped with a fan that is driven to blow air, and vibrations caused by the rotation of the fan are easily transmitted to the casing 1.

As shown in Figs. 4 and 5, the casing 1 preferably further includes a stopper 60. The stopper 60 is configured to abut against the pressing member 33 from the opposite direction to the rotational direction (counterclockwise in Figs. 4 and 5) of the pressing member 33 when pressing the air filter 100, thereby preventing the pressing member 33 from rotating beyond the rotational position for pressing the air filter 100, and functions as a stopper. If the pressing member 33 rotates beyond the rotational position for pressing the air filter 100, even if the operated part 31 is to be rotated once more to perform the pressing operation again, it becomes necessary to insert a finger into a narrow space in the casing 1 to operate the operated part 31, or it cannot be rotated due to contact with the inner wall of the casing 1, which makes the installation work of the air filter 100 time-consuming. For this reason, it is preferable to prevent the pressing member 33 from rotating beyond the rotational position for pressing the air filter 100.

As shown in Figures 1 and 4 to 6, the casing 1 preferably includes a frame 40. The frame 40 has a pair of walls 41, 42 and two protrusions 43, 44. The frame 40 is not shown in Figure 3.
The wall portions 41 and 42 are provided on both sides of the pressing member 33 in the depth direction (Z direction) so as to be perpendicular to the depth direction (Z direction), and are configured to support the rotation of the drive shaft 35.
The protrusions 43, 44 extend from both sides of the center line of the drive shaft 35 of the first wall portion 41, below the drive shaft 35, toward the second wall portion 42 facing the first wall portion 41. The protrusion 43 functions as a mounting portion 50, and the protrusion 44 functions as a stopping portion 60.

Two frames 40 are arranged in two positions in the depth direction (Z direction) corresponding to the depth direction positions of the pressing members 33, so as to extend inside the casing 1 in a direction parallel to the width direction (Y direction) of the casing 1. Both ends of the frame 40 in the extension direction (Y direction) are connected to the inner wall of the side of the casing 1. In the illustrated example, the cross-sectional shape of the frame 40 perpendicular to the extension direction (Y direction) of the frame 40 is a substantially U-shaped shape that opens downward. The two pressing members 33 arranged on both sides of the width direction (Y direction) of the casing 1 are covered by the frame 40 so as to be located between the walls 41 and 42 of one frame 40. The protrusions 43 and 44 shown in FIG. 5 are bent so as to protrude from the lower end of the wall 41 to the front side in the depth direction (Z direction).

The frame 40 is provided with an insertion hole (only the insertion hole 42a of the wall 42 is shown) that opens downward so that the drive shaft 35 is arranged to penetrate the wall parts 41 and 42. The frame 40 is also provided with a support member 45 that is arranged to penetrate the drive shaft 35 arranged to penetrate the insertion hole and has an insertion hole 45a that opens to the side so that the drive shaft 35 can be supported from below. The support member 45 shown in FIG. 5 has a cross section perpendicular to the width direction (Y direction) of the casing 1 that is approximately U-shaped with the bottom open, and is attached to the frame 40 so as to cover a part of the Y direction region of the frame 40. It is preferable that the casing 1 further includes such a support member 45. As a result, the drive shaft 35 is positioned in the vertical direction (X direction) and the horizontal direction (Y direction), and the magnitude of the pressing force by the pressing member 33 is stabilized.

To adjust the height position of the drive shaft 35, the casing 1 may further include one or more (e.g., two) plates (not shown) arranged to be sandwiched between the upper surface of the frame 40 and the support member 45 shown in FIG. 5. By adjusting the height position of the drive shaft 35 using the plates, the magnitude of the pressing force by the pressing member 33 can be adjusted.

It is preferable that the depthwise distance G1 between the protrusion 43 functioning as the mounting portion 50 and the second wall portion 42 is wider than the depthwise length L of the pressing member 33, and the depthwise distance G2 between the protrusion 44 functioning as the stop portion 60 and the second wall portion 42 is narrower than the depthwise length L of the pressing member 33. This allows the pressing member 33 to be switched between a rotatable state and an unrotatable state depending on the depthwise position of the drive shaft 35, and ensures the effect of preventing the pressing member 33 from rotating beyond the rotational position at which the pressing state is reached, regardless of the depthwise position of the drive shaft 35.

Figure 6 shows the mounting device 70. It is preferable that the casing 1 further includes the mounting device 70. The mounting device 70 is a member that is removably mounted to the frame 40. The mounting device 70 is arranged on the side where the operated part 31 rotates to release the pressure, with respect to the operated part 31 located at a rotational position corresponding to the rotational position of the pressing member 33 that pressed the air filter 100, so as to prevent the rotation of the operated part 31 that releases the pressure of the air filter 100. This prevents the casing 1 from receiving vibrations from the air conditioner during use, causing the drive shaft 35 to rotate, thereby preventing the pressure of the air filter 100 from being released. The mounting device 70 is attached to the frame 40 after the air filter 100 is attached. Of the two frames 40 shown in Figure 1, it is preferable that the mounting device 70 is attached to the front frame 40. The form of the mounting device is not limited to that shown in FIG. 6. According to one example, the mounting device may be in the form shown in FIG. 1, and may be attached to the inner surface of the outlet door instead of being attached to the frame 40. In this case, the mounting device can be left attached to the door regardless of the installation of the air filter 100.

It is preferable that the mounting device 70 is configured to abut against the air filter 100 in the mounting space S' from the front side in the depth direction, thereby preventing the air filter 100 from slipping out of the mounting space S'. The mounting device 70 shown in FIG. 6 has an abutment portion 70a that abuts against the attached air filter 100 from the front side.

In another embodiment, the casing comprises:
A filter casing configured to guide an air filter to a predetermined mounting position and allow air taken in from the outside to pass through the air filter mounted at the mounting position,
a receiving portion for receiving the air filter at the mounting position;
a pressing mechanism provided to sandwich an installation space corresponding to the installation position among the space within the casing that serves as a passage for the air filter guided to the installation position between the pressing mechanism and the receiving part, the pressing mechanism including an operated part and a pressing member configured to press the air filter against the receiving part by operating the operated part, thereby attaching the air filter;
The air filter is characterized in that it is provided with a stop portion configured to prevent movement of the pressing member by abutting against the pressing member pressing the air filter, thereby releasing the pressing of the air filter.

If the pressing member deviates from the position for pressing the air filter, even if you try to operate the operated part again to press the air filter again, you may have to insert your finger into a narrow space inside the casing 1 to operate the operated part, or you may come into contact with the inner wall of the casing and be unable to rotate it, making the installation of the air filter time-consuming. With the casing of this embodiment, it is possible to prevent the pressing member from deviating from the position for pressing the air filter and rotating. The stopping part functions as a stopper.

The casing of this embodiment is preferably configured similarly to the casing 1 of the above embodiment.

(Filter housing)
The filter housing 80 of the embodiment includes the casing 1 of the above embodiment and an air filter 100 .

The air filter 100 is guided to an installation position in the casing 1 and installed at the installation position. The air filter 100 includes a filter material (not shown) and an outer frame 101. In Figs. 1 to 3 and 6, the air filter 100 is shown by the outline of the outer frame 101. The filter material is configured to pass air and collect dust in the air. The filter material is, for example, a sheet-like member made of nonwoven fabric that is pleated and folded into a zigzag shape. The outer frame 101 is a member that surrounds the filter material so that air passes through it. The outer frame 101 preferably has a rectangular shape and is supported from below by the receiving portion 10. The air filter 100 has the performance of, for example, a HEPA filter.

The casing 1 has a guide portion 11. The guide portion 11 is a portion of the casing 1 that includes the receiving portion 10 that receives the air filter 100 at the mounting position. The guide portion 11 in Figures 1 to 3 is made up of a support base that constitutes the receiving portion 10. The guide portion 11 is formed inside the casing 1 along the path of the air filter 100 that is guided to the mounting position, and is configured to contact the air filter 100, receive the air filter 100, and guide it to the mounting position.

The air filter 100 is provided with a member (hereinafter referred to as the contact portion) 102 (see FIG. 2) made of a fluororesin material at a portion that contacts the guide portion 11. This reduces friction between the air filter 100 and the guide portion 11 when the air filter 100 is inserted into or removed from the casing 1, and as shown in FIG. 2(a), the operation of moving the air filter 100 in the depth direction from the outlet toward the mounting position can be performed smoothly. Therefore, the maintainability is further improved. The fluororesin material is a material containing fluororesin, and is preferably a material made of fluororesin. The fluororesin is preferably at least one of PTFE (polytetrafluoroethylene), ETFE (ethylene-tetrafluoroethylene copolymer), PFA (perfluoroethylene-perfluoroalkoxyethylene copolymer), FEP (perfluoroethylene-perfluoropropylene copolymer), and PVDF (polyvinylidene fluoride), and is more preferably PTFE. The contact portion 102 is, for example, a sheet-like member that is attached to the lower surface of the outer frame 101 facing the receiving portion 10.

The air filter 100 preferably further includes a gasket 103. The gasket 103 is provided so as to be interposed between the contact portion 102 and the lower surface of the outer frame 101. This prevents air from leaking between the pressed air filter 100 and the receiving portion 10, improving sealing performance. The gasket 103 is made of, for example, a rigid foamed polyurethane resin material.

The present invention has been described in detail above, but the present invention is not limited to the above embodiment, and various improvements and modifications may of course be made without departing from the spirit of the present invention.

For example, in the casing 1 of the above embodiment, the azimuth direction in which the operated portion 31 extends away from the drive shaft 35 with respect to the center line of the drive shaft 35 of the pressing mechanism 30 and the azimuth direction in which the pressing portion 33b of the pressing member 33 is located do not have to overlap. For example, when viewed in the direction of the center line of the drive shaft 35, the direction in which the operated portion 31 extends away from the drive shaft 35 and the direction in which the pressing portion 33b extends toward the tip of the pressing member may be approximately parallel.

REFERENCE SIGNS LIST 1 filter casing 10 receiving portion 11 guide portion 30 pressing mechanism 31 operated portion 33 pressing member 33a extension portion 33b pressing portion 35 drive shaft 40 frame 41 first wall portion 42 second wall portion 42a, 45a insertion opening 43, 44 protrusion portion 50 mounting portion 50a mounting surface 60 stop portion 70 mounting fixture 70a abutment portion 80 filter housing 100 air filter 101 outer frame 102 contact portion 103 gasket

Claims (9)

A filter casing configured to guide an air filter to a predetermined mounting position and allow air taken in from the outside to pass through the air filter mounted at the mounting position,
a receiving portion for receiving the air filter at the mounting position;
a pressing mechanism provided to sandwich an installation space corresponding to the installation position among the spaces within the casing that serve as a passage for the air filter guided to the installation position, between the receiving part and the pressing mechanism, the pressing mechanism having an operated part and a pressing member configured to press the air filter against the receiving part by operating the operated part, thereby attaching the air filter, the pressing mechanism configured such that a part of the operated part or the pressing member enters into the space by the weight of the operated part or the pressing member;
A casing for a filter, comprising: a mounting portion configured to prevent the operated portion or the portion of the pressing member from entering the space by placing the portion of the pressing member outside the space. the pressing mechanism further includes a drive shaft extending in a depth direction of the casing parallel to a moving direction of the air filter guided within the space, the drive shaft being connected to the operated portion and the pressing member so as to rotate integrally with the operated portion and the pressing member, the drive shaft being movable in the depth direction and rotatable around a center line of the drive shaft,
the pressing mechanism is configured such that, when the drive shaft is positioned at a first depth direction position, the pressing member rotates about the center line and is able to press the air filter,
2. The filter casing according to claim 1, wherein the mounting portion is configured such that the pressing member is positioned at a predetermined rotational position and the drive shaft is positioned at a second depthwise position different from the first depthwise position, thereby causing the pressing member to be placed on the mounting portion. the pressing member has a portion that extends away from the drive shaft and a portion that extends in a horizontal direction when the pressing member is located at the rotational direction position,
The filter casing according to claim 2 , wherein the mounting portion has a horizontal mounting surface that supports the portion from below. The filter casing according to claim 2 or 3, further comprising a stopper configured to prevent the pressing member from rotating beyond a rotational position for pressing the air filter by contacting the pressing member from a direction opposite to the rotational direction of the pressing member when pressing the air filter. The casing comprises:
A pair of walls are provided on both sides of the pressing member in the depth direction so as to be perpendicular to the depth direction, and are configured to support rotation of the drive shaft;
two protrusions each extending from a portion of a first wall portion on both sides of the center line of the first wall portion to a position below the drive shaft toward a second wall portion opposed to the first wall portion, the two protrusions functioning as the placement portion and the stop portion;
5. The filter casing of claim 4 comprising a frame having a. a distance in the depth direction between the protruding portion that functions as the placement portion and the second wall portion is greater than a length of the pressing member in the depth direction;
The filter casing according to claim 5 , wherein a distance in the depth direction between the protruding portion functioning as the stopper and the second wall portion is narrower than a length of the pressing member in the depth direction. the operated unit is disposed on a front side of the frame in the depth direction,
7. The filter casing as described in claim 5 or 6, further comprising an attachment device that is removably attached to the frame, and the attachment device is arranged on the side where the operated part rotates to release the pressure, relative to the operated part that is located at a rotational position corresponding to the rotational position of the pressing member pressing the air filter, so as to prevent the operated part from rotating in a way that would release the pressure on the air filter. The filter casing according to claim 7, wherein the mounting fixture is configured to prevent the air filter from slipping out of the mounting space by contacting the air filter from the front side in the depth direction in the mounting space. A filter casing according to any one of claims 1 to 8;
an air filter guided to an attachment position within the casing and attached to the attachment position;
the casing has a guide portion including a receiving portion that receives the air filter at the mounting position, the guide portion being formed in the casing along a passage of the air filter that is guided to the mounting position and configured to contact the air filter to receive the air filter and guide it to the mounting position,
The filter housing is characterized in that the air filter is provided with a member made of a fluorine-based resin material at a portion that contacts the guide portion.

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