Patent Description:
Patent Literature (PTL) <NUM> discloses a sash in which a guide groove for dew condensation water is formed in each of an upper frame of a sash window frame and a sash door stile to prevent intrusion of the dew condensation water into a room. The dew condensation water is guided to a lower frame of the sash window frame through the guide groove. The dew condensation water guided to the lower frame is drained through, for example, a drain hole formed in the lower frame. Further relevant prior art can be found in <CIT> and <CIT>.

In a cold storage for storing pharmaceuticals and so on at a low temperature, because a temperature difference between the inside and the outside of a storage chamber is relatively large, a relatively large amount of dew condensation water generates on a sliding door for opening and closing the storage chamber and on a frame to which the sliding door is attached, and the dew condensation water flows down toward a lower frame. When the relatively large amount of the dew condensation water falls down to the lower frame, the dew condensation water may remain on the lower frame in some cases without being completely drained through a drain hole.

An object of the present disclosure is to increase the efficiency in draining the dew condensation water in a cold storage.

In order to achieve the abovementioned object, a cold storage of the present disclosure includes: a box with an opening at front; a frame bordering the opening; a sliding door attached to the frame and including, in at least one of a left-side end portion and a right-side end portion, a drain channel extending vertically; and a porous body with water permeability, the porous body being attached to an upper surface of the sliding door to establish fluid communication with the drain channel.

With the cold storage according to the present disclosure, the efficiency in draining the dew condensation water can be increased.

An embodiment of a cold storage according to the present disclosure will be described below with reference to the drawings. In the following description, it is assumed that, as denoted by arrows in <FIG>, a side where left-side sliding door <NUM> and right-side sliding door <NUM> are disposed is a front side with respect to cold storage <NUM>, and a side opposite to the above side is a rear side with respect to cold storage <NUM>. Left and right sides when cold storage <NUM> is viewed from the front are respectively left and right sides with respect to cold storage <NUM>. A side away from a plane on which cold storage <NUM> is installed is an upper side with respect to cold storage <NUM>, and a side opposite to the above side is a lower side with respect to cold storage <NUM>.

Cold storage <NUM> is a pharmaceutical cold storage for storing pharmaceuticals at a low temperature. Cold storage <NUM> may be a cold storage for blood or a constant temperature container. As illustrated in <FIG>, cold storage <NUM> includes box <NUM>, frame <NUM>, left-side sliding door <NUM>, right-side sliding door <NUM>, and machine storage chamber <NUM> in which members (not illustrated) constituting a refrigeration circuit are accommodated. Left-side sliding door <NUM> and right-side sliding door <NUM> are each an example of a "sliding door".

Box <NUM> has, in its front surface, opening H that provides an entrance opened and closed with movement of left-side sliding door <NUM> or right-side sliding door <NUM>. A heat insulating material is filled between an outer surface and an inner surface of box <NUM>. A space surrounded by the inner surface of box <NUM> serves as a storage chamber, namely a space in which pharmaceuticals are stored.

Frame <NUM> is attached to box <NUM> in such a way of bordering opening H. Left-side sliding door <NUM> and right-side sliding door <NUM> are disposed in frame <NUM> to be movable in a left-right direction. Left-side sliding door <NUM> moves on an inner side of the cold storage than right-side sliding door <NUM>. Frame <NUM> includes upper frame <NUM>, lower frame <NUM>, and a pair of vertical frames <NUM>.

Upper frame <NUM> corresponds to an upper side portion of frame <NUM>. As illustrated in <FIG> and <FIG>, upper frame <NUM> includes guide groove 21a for guiding left-side sliding door <NUM> in the left-right direction. Auxiliary sealing member S1 is disposed on a rear wall of guide groove 21a to extend in the left-right direction. Protruding portion 21a1 is formed in a lower end portion of a front wall of guide groove 21a to extend in the left-right direction. Details of auxiliary sealing member S1 and protruding portion 21a1 will be described later.

Opening/closing detection apparatus <NUM> and heat-insulating porous body <NUM> are attached to guide groove 21a. Opening/closing detection apparatus <NUM> and heat-insulating porous body <NUM> are attached to be held out of contact with left-side sliding door <NUM>. Heat-insulating porous body <NUM> is an example of a "second porous body".

Opening/closing detection apparatus <NUM> detects opening/closing of left-side sliding door <NUM>. Opening/closing detection apparatus <NUM> is, for example, a magnetic switch.

Heat-insulating porous body <NUM> is a porous body with heat insulation. Heat-insulating porous body <NUM> is a foam with an independent foam structure. Heat-insulating porous body <NUM> does not have water permeability. Heat-insulating porous body <NUM> is formed by using, for example, a polymer material such as polyethylene. Because heat-insulating porous body <NUM> is attached to upper frame <NUM>, heat insulation at opening H can be increased. Heat-insulating porous body <NUM> may have a continuous foam structure with water permeability.

Heat-insulating porous body <NUM> is formed in a rectangular parallelepiped shape. Heat-insulating porous body <NUM> is attached to face an upper surface of left-side sliding door <NUM>.

As illustrated in <FIG> and <FIG>, lower frame <NUM> includes a pair of rails 22a, recessed portion 22b, and drain outlet 22c.

The pair of rails 22a guide left-side sliding door <NUM>. More specifically, the pair of rails 22a guide door roller <NUM> described later.

Recessed portion 22b is a portion into which door roller <NUM> (described later) falls when left-side sliding door <NUM> is closed and from which door roller <NUM> climbs up when left-side sliding door <NUM> is opened. Recessed portion 22b is formed in a dent shape between the pair of rails 22a on lower frame <NUM> in a region where left-side sliding door <NUM> is positioned when left-side sliding door <NUM> is closed (hereinafter also referred to as a "closed state"). Recessed portion 22b is formed in number corresponding to the number of door rollers <NUM>. Because left-side sliding door <NUM> includes two door rollers <NUM>, there are formed two recessed portions 22b corresponding to left-side sliding door <NUM>. Furthermore, of two recessed portions 22b corresponding to left-side sliding door <NUM>, recessed portion 22b on the left side is formed to be deeper than recessed portion 22b on the right side.

Drain outlet 22c is a through-hole that is opened to penetrate through lower frame <NUM>. Drain outlet 22c causes the dew condensation water to be drained into machine storage chamber <NUM> through a drainpipe (not illustrated).

Upper frame <NUM> and lower frame <NUM> further include constituent elements for right-side sliding door <NUM>, those constituent elements being similar to the above-described ones for left-side sliding door <NUM>. The constituent elements for right-side sliding door <NUM>, included in upper frame <NUM> and lower frame <NUM>, are disposed on a side nearer to the outside of the cold storage than those for left-side sliding door <NUM>. Because right-side sliding door <NUM> also includes two door rollers <NUM>, there are formed two recessed portions 22b corresponding to right-side sliding door <NUM>. Furthermore, of two recessed portions 22b corresponding to right-side sliding door <NUM>, recessed portion 22b on the right side is formed to be deeper than recessed portion 22b on the left side.

As illustrated in <FIG>, left-side sliding door <NUM> includes frame-shaped stile member <NUM>, a pair of glass plates <NUM> attached to stile member <NUM>, and two door rollers <NUM>. Stile member <NUM> includes upper stile 31a, left stile 31b, right stile 31c, and lower stile 31d. Note that <FIG> illustrate left-side sliding door <NUM> in the closed state.

Upper stile 31a includes a pair of elongate portions 31a1. The pair of elongate portions 31a1 are disposed in a front end portion and a rear end portion of an upper surface of upper stile 31a and serve as sidewalls forming a trough. Right-side ends of the pair of elongate portions 31a1 are connected to each other by an upper end portion of right stile 31c. In other words, the upper surface of upper stile 31a is surrounded by the pair of elongate portions 31a1 and right stile 31c continuously along the rear end portion, a right-side end portion, and the front end portion of the upper surface. The upper surface of upper stile 31a corresponds to the upper surface of left-side sliding door <NUM>.

Left stile 31b is constituted in the form of a tube extending in an up-down direction, being opened at opposite ends, and having a rectangular shape in a plan view. The inside of left stile 31b serves as a drain channel (described later) through which the dew condensation water passes. Thus, the drain channel is disposed in a left-side end portion of left-side sliding door <NUM>. While the drain channel is disposed in the tubular form as described above, it may be disposed in the form of a groove. Moreover, left stile 31b includes cutout portion 31b1 that is formed by cutting an upper end portion of a right sidewall of left stile 31b.

Two door rollers <NUM> are attached to lower stile 31d. It is needless to say that the number of door roller <NUM> is not limited to two. With rotation of door rollers <NUM>, left-side sliding door <NUM> moves along the pair of rails 22a.

Magnet <NUM>, water-permeable porous body <NUM>, and second water-permeable porous body <NUM> are further attached to the upper surface of left-side sliding door <NUM>. Water-permeable porous body <NUM> and second water-permeable porous body <NUM> are each an example of a "porous body".

Magnet <NUM> is attached to be positioned to face opening/closing detection apparatus <NUM> in the state in which left-side sliding door <NUM> is closed. Magnet <NUM> activates opening/closing detection apparatus <NUM>.

Water-permeable porous body <NUM> is a porous body with water permeability. Water-permeable porous body <NUM> is a foam with the continuous foam structure. Water-permeable porous body <NUM> is formed by using, for example, a polymer material such as polyethylene. Water-permeable porous body <NUM> has elasticity. Alternatively, water-permeable porous body <NUM> may be made of metal, non-woven fabric, felt, wood, ceramic, or the like.

Water-permeable porous body <NUM> is formed in a rectangular parallelepiped shape and is attached to a position on the left of magnet <NUM>. An upper end of water-permeable porous body <NUM> is positioned lower than upper ends of the pair of elongate portions 31a1. Water-permeable porous body <NUM> is attached to the upper surface of left-side sliding door <NUM> (namely, the upper surface of upper stile 31a) to partially position inside left stile 31b. Because left stile 31b is in the tubular form being opened at the opposite ends as described above, a portion of water-permeable porous body <NUM> positioned inside left stile 31b extends downward and faces lower frame <NUM>.

In more detail, water-permeable porous body <NUM> is attached to extend from the upper surface of left-side sliding door <NUM> to the inside of left stile 31b. Water-permeable porous body <NUM> has an L-like shape in a front view and is attached to a region spanning between the pair of elongate portions 31a1 on the upper surface of upper stile 31a, through cutout portion 31b1, and over an inner peripheral surface of left stile 31b. When water-permeable porous body <NUM> is formed of a flexible member, it may be attached in a manner of bending flexible member in a linear shape and bonding the same.

Second water-permeable porous body <NUM> is a porous body with water permeability. Second water-permeable porous body <NUM> is formed by using the same material as that of water-permeable porous body <NUM>. The material properties of second water-permeable porous body <NUM> may be different from those of water-permeable porous body <NUM>.

Second water-permeable porous body <NUM> is formed in a rectangular parallelepiped shape and is attached to the upper surface of upper stile 31a at a position on the right of magnet <NUM>. An upper surface of second water-permeable porous body <NUM> is positioned higher than the upper ends of the pair of elongate portions 31a1. Second water-permeable porous body <NUM> is held out of contact with opening/closing detection apparatus <NUM> and heat-insulating porous body <NUM> when left-side sliding door <NUM> is opened and closed.

Left-side sliding door <NUM> further includes packing <NUM>, a pair of upper sealing members S2, and a pair of lower sealing members S3. Packing <NUM>, the pair of upper sealing members S2, and the pair of lower sealing members S3 seal between left-side sliding door <NUM> and frame <NUM> in the state in which left-side sliding door <NUM> is closed. In <FIG>, packing <NUM> is denoted by a two-dot-chain line.

Packing <NUM> seals between left-side sliding door <NUM> and left-side vertical frame <NUM> when left-side sliding door <NUM> is in the closed state. Packing <NUM> is attached on the left side of left stile 31b. Packing <NUM> is held in contact with left-side vertical frame <NUM> when left-side sliding door <NUM> is in the closed state.

The pair of upper sealing members S2 seal between left-side sliding door <NUM> and upper frame <NUM> when left-side sliding door <NUM> is in the closed state. The pair of upper sealing members S2 are disposed on upper stile 31a to extend in the left-right direction. Upper sealing member S2 on the front side is held in contact with protruding portion 21a1 when left-side sliding door <NUM> is in the closed state. Upper sealing member S2 on the rear side is held in contact with auxiliary sealing member S1 when left-side sliding door <NUM> is in the closed state.

The pair of lower sealing members S3 seal between left-side sliding door <NUM> and lower frame <NUM> when left-side sliding door <NUM> is in the closed state. The pair of lower sealing members S3 are held in contact with an upper surface of lower frame <NUM> when left-side sliding door <NUM> is in the closed state.

Right-side sliding door <NUM> is constituted to be symmetrical to left-side sliding door <NUM> in the left-right direction. In more detail, a right stile of right-side sliding door <NUM> is constituted in the form of a tube extending in the up-down direction and being opened at opposite ends. The inside of the right stile of right-side sliding door <NUM> serves as a drain channel. Thus, the drain channel is formed in a right-side end portion of right-side sliding door <NUM>.

Water-permeable porous body <NUM> attached to right-side sliding door <NUM> extends from an upper surface of right-side sliding door <NUM> to the inside of the right stile. Water-permeable porous body <NUM> and second water-permeable porous body <NUM> attached to right-side sliding door <NUM> may be different in shape, size, and so on from water-permeable porous body <NUM> and second water-permeable porous body <NUM> attached to left-side sliding door <NUM>.

An operation of left-side sliding door <NUM> will be described below. In the closed state of left-side sliding door <NUM>, door rollers <NUM> fall in recessed portions 22b in one-to-one relation (<FIG>). Because, as described above, recessed portion 22b on the left-side, corresponding to left-side sliding door <NUM>, is formed to be deeper than recessed portion 22b on the right side, the upper surface of left-side sliding door <NUM> inclines from the upper side toward the lower side as a position gradually goes toward the left from the right in the closed state of left-side sliding door <NUM>. In other words, left-side sliding door <NUM> in the closed state is inclined such that its upper surface is positioned at a lower level on a side nearer to left stile 31b (namely, on a side nearer to the drain channel). Moreover, when left-side sliding door <NUM> is in the closed state, packing <NUM>, the pair of upper sealing members S2, and the pair of lower sealing members S3 seal between left-side sliding door <NUM> and frame <NUM>.

When left-side sliding door <NUM> is moved to the right, door rollers <NUM> climbs up from recessed portions 22b, and hence left-side sliding door <NUM> is elevated upward corresponding to the depths of recessed portions 22b. Thus, packing <NUM> departs away from left-side vertical frame <NUM>, the pair of upper sealing members S2 depart away from protruding portion 21a1 and auxiliary sealing member S1, and the pair of lower sealing members S3 depart away from lower frame <NUM>.

Furthermore, second water-permeable porous body <NUM> approaches upper frame <NUM>. More specifically, second water-permeable porous body <NUM> approaches heat-insulating porous body <NUM>. In other words, when left-side sliding door <NUM> is moved, gap H1 between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> becomes narrower than gap H2 between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> when left-side sliding door <NUM> is closed (<FIG>).

Left-side sliding door <NUM> is moved to the right along the pair of rails 22a while the narrowed gap between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> is kept. When right-side sliding door <NUM> in the closed state is opened, right-side sliding door <NUM> operates in a similar way to the above-described operation of left-side sliding door <NUM> except for that right-side sliding door <NUM> is moved in a direction opposite to the movement of left-side sliding door <NUM> (namely to the left).

A flow path of the dew condensation water generating on upper frame <NUM> above left-side sliding door <NUM> in the closed state will be described below. The dew condensation water generates on upper frame <NUM> due to a temperature difference between the temperature in the storage chamber and the temperature of outside air. The dew condensation water generates on an inner surface of upper frame <NUM> and a surface of heat-insulating porous body <NUM>. The dew condensation water having generated on upper frame <NUM> collects into a droplet and then falls down onto respective upper surfaces of second water-permeable porous body <NUM> and upper stile 31a.

The dew condensation water having fallen down onto second water-permeable porous body <NUM> passes through second water-permeable porous body <NUM> and flows onto the upper surface of upper stile 31a. Furthermore, as described above, the upper surface of left-side sliding door <NUM> inclines from the upper side toward the lower side as a position gradually goes toward the left from the right in the closed state of left-side sliding door <NUM>. Accordingly, the dew condensation water having flowed onto the upper surface of upper stile 31a and the dew condensation water having fallen down from upper frame <NUM> to the upper surface of upper stile 31a are caused to flow to the left with the presence of the pair of elongate portions 31a1 and right stile 31c without flowing down along a front surface, a rear surface, and a right lateral surface of left-side sliding door <NUM>.

The dew condensation water flowing to the left over the upper surface of upper stile 31a reaches water-permeable porous body <NUM>. The dew condensation water having reached water-permeable porous body <NUM> passes through water-permeable porous body <NUM> and flows to the inside of left stile 31b. Because water-permeable porous body <NUM> has the continuous foam structure as described above, water-permeable porous body <NUM> acts as a resistance against a flow of the dew condensation water.

Thus, force of the flow of the dew condensation water is suppressed by water-permeable porous body <NUM>. As a result, a flow speed, namely a flow rate per unit time, of the dew condensation water flowing from the upper surface of upper stile 31a to the inside of left stile 31b is suppressed.

The dew condensation water having flowed to the inside of left stile 31b passes through the inside of left stile 31b, flows to lower frame <NUM>, and is then drained to machine storage chamber <NUM> through drain outlet 22c. Drain outlet 22c is set to a minimum required size to minimize the influence of the environment inside machine storage chamber <NUM> upon the environment inside the cold storage. If the flow rate of the dew condensation water per unit time is not suppressed and a large amount of the dew condensation water is delivered to the surrounding of drain outlet 22c at a time, the dew condensation water cannot smoothly pass through drain outlet 22c and spreads over the upper surface of lower frame <NUM>. Once the dew condensation water spreads, the dew condensation water having spread up to a distant position away from drain outlet 22c cannot move back to drain outlet 22c. In other words, part of the dew condensation water is not drained and remains on the upper surface of lower frame <NUM>. By contrast, in cold storage <NUM> according to this embodiment, the flow rate of the dew condensation water per unit time is suppressed. More specifically, the flow rate of the dew condensation water per unit time is suppressed to be equal to or smaller than a value at which drain outlet 22c allows the water to smoothly pass therethrough. Since the flow rate of the dew condensation water per unit time is suppressed by water-permeable porous body <NUM>, the dew condensation water is drained through drain outlet 22c without remaining on lower frame <NUM>. Accordingly, the efficiency in draining the dew condensation water can be increased with the presence of water-permeable porous body <NUM>. Thus, the material properties and the size of water-permeable porous body <NUM> are preferably determined and set such that the flow rate of the dew condensation water passing through water-permeable porous body <NUM> per unit time is held equal to or smaller than the flow rate per unit time at which the dew condensation water can pass through drain outlet 22c by gravity alone.

In addition, when left-side sliding door <NUM> is moved as described above, second water-permeable porous body <NUM> approaches heat-insulating porous body <NUM>. Accordingly, as illustrated in <FIG>, second water-permeable porous body <NUM> scrapes off a droplet W of the dew condensation water present on the surface of heat-insulating porous body <NUM>. Thus, when left-side sliding door <NUM> is opened and a sample or the like is taken out from the storage chamber, the dew condensation water can be prevented from falling down onto the sample or the like.

As described above, right-side sliding door <NUM> is constituted to be symmetrical to left-side sliding door <NUM> in the left-right direction. Moreover, because recessed portion 22b on the right side, corresponding to right-side sliding door <NUM>, is formed to be deeper than recessed portion 22b on left side, the upper surface of right-side sliding door <NUM> inclines from the upper side toward the lower side as a position gradually goes toward the right from the left in the closed state of right-side sliding door <NUM>. Accordingly, as with the above-described dew condensation water falling down onto the upper surface of left-side sliding door <NUM>, the dew condensation water falling down onto the upper surface of right-side sliding door <NUM> passes through water-permeable porous body <NUM> and flows toward lower frame <NUM> through the inside of the right stile. In addition, as with above-described second water-permeable porous body <NUM> attached to left-side sliding door <NUM>, second water-permeable porous body <NUM> attached to right-side sliding door <NUM> scrapes off a droplet of the dew condensation water generating on the heat-insulating porous body that is disposed to face the upper surface of right-side sliding door <NUM>.

The present disclosure is not limited to the above-described embodiment.

For example, while water-permeable porous body <NUM> and second water-permeable porous body <NUM> are attached to the upper surface of upper stile 31a, second water-permeable porous body <NUM> may not always need to be attached. Furthermore, a porous body obtained by integrating water-permeable porous body <NUM> and second water-permeable porous body <NUM> together may be attached. Another porous body with water permeability may be further attached in addition to water-permeable porous body <NUM> and second water-permeable porous body <NUM>.

A size of the gap between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> when left-side sliding door <NUM> is moved may be different from that between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> when right-side sliding door <NUM> is moved. For example, the gap between second water-permeable porous body <NUM> and heat-insulating porous body <NUM> may be set to be narrower for one of left-side sliding door <NUM> and right-side sliding door <NUM> on which the dew condensation water is more apt to generate. This feature enables second water-permeable porous body <NUM> to more easily scrape off the dew condensation water for the one of left-side sliding door <NUM> and right-side sliding door <NUM> on which the dew condensation water is more apt to generate.

Heat-insulating porous body <NUM> may not always need to be attached to upper frame <NUM>. When heat-insulating porous body <NUM> is not attached to upper frame <NUM>, second water-permeable porous body <NUM> is formed such that, when left-side sliding door <NUM> and right-side sliding door <NUM> are each moved, second water-permeable porous body <NUM> approaches a portion of upper frame <NUM>, the portion being positioned to face second water-permeable porous body <NUM>, and scrapes off the droplet of the dew condensation water.

While water-permeable porous body <NUM> has the L-like shape (<FIG>), it may have a linear shape as illustrated in <FIG>. In this case, water-permeable porous body <NUM> can be more easily manufactured. When water-permeable porous body <NUM> is formed in a flexible shape, water-permeable porous body <NUM> can be easily attached without bending the same in advance. Moreover, when the upper end of left stile 31b is at the same height as the upper surface of upper stile 31a as illustrated in <FIG>, water-permeable porous body <NUM> formed in the linear shape is disposed to overlap with the inside of left stile 31b and to face lower frame <NUM> without being partially disposed inside left stile 31b.

While the inside of left stile 31b serves as the drain channel through which the dew condensation water passes, the drain channel may be further formed in the inside of right stile 31cl. In this case, right stile 31c is constituted in the form of a tube as with left stile 31b, and a porous body with water permeability may be attached to the upper surface of upper stile 31a to establish fluid communication with the inside of right stile 31c. When the drain channel is formed in each of the inside of left stile 31b and the inside of right stile 31c, the depths of two recessed portions 22b corresponding to left-side sliding door <NUM> may be set equal to each other such that the upper surface of left-side sliding door <NUM> does not incline in the closed state (namely, such that the upper surface of left-side sliding door <NUM> is substantially horizontal). The drain channel may not always need to be formed in the inside of left stile 31b and may be formed only in the inside of right stile 31c. When the drain channel is formed only in the inside of right stile 31c, the upper surface of left-side sliding door <NUM> may incline from the upper side toward the lower side as a position gradually goes toward the right from the left in the closed state of left-side sliding door <NUM>. In this case, of two recessed portions 22b corresponding to left-side sliding door <NUM>, recessed portion 22b on the right side is formed to be deeper than recessed portion 22b on the left side.

Each of left-side sliding door <NUM> and right-side sliding door <NUM> does not always need to include the pair of elongate portions 31a1.

While door rollers <NUM> are attached to lower stile 31d, they may be attached to upper stile 31a. When door rollers <NUM> are attached to upper stile 31a, left-side sliding door <NUM> and right-side sliding door <NUM> are each constituted as a suspended sliding door. Left-side sliding door <NUM> and right-side sliding door <NUM> may not always need to include door rollers <NUM>. Moreover, the positions at which door rollers <NUM> are attached may be adjusted to make each of left-side sliding door <NUM> and right-side sliding door <NUM> inclined such that a portion of the upper surface of the sliding door on a side nearer to the drain channel is positioned at a relatively low level even during the movement of the sliding door.

Claim 1:
A cold storage (<NUM>) comprising:
a box (<NUM>) with an opening (H) at front;
a frame (<NUM>) bordering the opening; and
a sliding door (<NUM>, <NUM>) attached to the frame and including, in at least one of a left-side end portion and a right-side end portion, a drain channel extending vertically;
characterized by further comprising
a porous body (<NUM>, <NUM>) with water permeability, the porous body being attached to an upper surface of the sliding door to establish fluid communication with the drain channel.