cold store

Abstract

The cold storage of the present application has: a box body having an opening in the front; a frame body surrounding the opening along the opening; a sliding door installed to the frame body and having a drainage passage extending in the up-down direction at at least one of the left end and the right end; and a porous body installed to the upper surface of the sliding door in a manner facing the drainage passage and having water permeability.

Description

Technical Field

[0001] This disclosure pertains to cold storage facilities. Background Technology

[0002] Patent document 1 discloses a sliding window in which, to prevent condensation from entering the room, the upper frame and sash frame of the sliding window have condensation guide grooves. The condensation is guided through these grooves to the lower frame of the sliding window frame. The condensation drained to the lower frame is discharged, for example, from a drain hole located in the lower frame.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Microfilm of Japanese Patent Application No. 50-060830 (Patent Application No. 51-140544). Summary of the Invention

[0006] The problem the invention aims to solve

[0007] Cold storage rooms where pharmaceuticals are stored at low temperatures experience significant temperature differences between the storage room and the outside. Consequently, condensation is generated in large quantities at the sliding doors that open and close the storage room, as well as at the frame where these doors are installed, and flows down the lower frame. If a large amount of condensation flows down to the lower frame, sometimes it cannot be completely drained through the drain holes and remains on the lower frame.

[0008] The purpose of this disclosure is to improve the drainage performance of condensate in cold storage.

[0009] Solution to the problem

[0010] To achieve the above objectives, the cold storage disclosed herein comprises: a box body having an opening at the front; a frame body surrounding the opening along the opening; a sliding door mounted on the frame body and having a drainage passage extending in the vertical direction at at least one of the left and right ends; and a porous body mounted on the upper surface of the sliding door facing the drainage passage and having water permeability.

[0011] Invention Effects

[0012] According to the cold storage disclosed herein, the drainage performance of condensate can be improved. Attached Figure Description

[0013] Figure 1 This is a perspective view of a cold storage facility according to an embodiment of the present disclosure.

[0014] Figure 2 It is a sectional view showing the upper end of the sliding door and the upper end of the frame when the sliding door is closed.

[0015] Figure 3It is a diagram showing the stepped section of the frame and the door and window pulleys of the sliding doors.

[0016] Figure 4 This is a horizontal sectional view of the sliding door in the closed position.

[0017] Figure 5 yes Figure 2 The cross-sectional view of the VV line shown.

[0018] Figure 6 This is a diagram showing the sliding door in motion.

[0019] Figure 7 This is a cross-sectional view of a cold storage facility, which is a variation of an embodiment of this disclosure. Detailed Implementation

[0020] The implementation of the cold storage according to this disclosure will now be described with reference to the accompanying drawings. Furthermore, in the following description, as... Figure 1 As indicated by the arrows, the side with the left sliding door 30 and the right sliding door 40 is designated as the front of the cold storage 1, and the opposite side is designated as the rear of the cold storage 1. Furthermore, the left and right sides when viewed from the front of the cold storage 1 are designated as the left and right sides of the cold storage 1. Additionally, the side furthest from the surface on which the cold storage 1 is located is designated as the upper part of the cold storage 1, and the opposite side is designated as the lower part of the cold storage 1.

[0021] Cold storage room 1 is a pharmaceutical cold storage facility used to preserve medicines at low temperatures. Additionally, cold storage room 1 can also be a blood cold storage facility or a thermostat. For example... Figure 1 As shown, the cold storage 1 includes: a cabinet 10, a frame 20, a left sliding door 30, a right sliding door 40, and a machine housing 50 that houses components (not shown) forming the refrigeration circuit. The left sliding door 30 and the right sliding door 40 are examples of "sliding doors".

[0022] The box 10 has an opening H on its front surface that opens due to the movement of the left sliding door 30 or the right sliding door 40. Insulating material is filled between the outer and inner surfaces of the box 10. The space enclosed by the inner surfaces of the box 10 is a storage compartment, a space for containing the medicine.

[0023] The frame body 20 is disposed on the housing 10 such that it surrounds the opening H along the opening H. The frame body 20 is disposed such that the left sliding door 30 and the right sliding door 40 can move in the left and right directions. The left sliding door 30 moves further inside the housing than the right sliding door 40. The frame body 20 includes an upper frame 21, a lower frame 22 and a pair of longitudinal frames 23.

[0024] The upper frame 21 corresponds to the upper part of the frame body 20. For example... Figure 2 and Figure 5As shown, the upper frame 21 has a guide groove 21a that guides the left sliding door 30 in the left-right direction. An auxiliary sealing member S1 is disposed on the rear sidewall of the guide groove 21a, extending in the left-right direction. Additionally, a protrusion 21a1 is formed at the lower end of the front sidewall of the guide groove 21a, extending in the left-right direction. Details regarding the auxiliary sealing member S1 and the protrusion 21a1 will be explained later.

[0025] Additionally, an opening / closing detection device 24 and a heat-insulating porous body 25 are installed in the guide groove 21a. The opening / closing detection device 24 and the heat-insulating porous body 25 are installed in a manner that does not contact the left-side sliding door 30. The heat-insulating porous body 25 is an example of a "second porous body".

[0026] The opening and closing detection device 24 detects the opening and closing of the left sliding door 30. The opening and closing detection device 24 is, for example, a magnetic switch.

[0027] The insulating porous body 25 is a porous body with insulating properties. The insulating porous body 25 is a foam with an independent foaming structure. The insulating porous body 25 is not permeable to water. The insulating porous body 25 is formed, for example, using a polymer material such as polyethylene. By installing the insulating porous body 25 onto the upper frame 21, the insulating properties of the opening H can be improved. Alternatively, the insulating porous body 25 can also be a continuous bubble structure with permeability to water.

[0028] The thermal insulation porous body 25 is formed in a cuboid shape. The thermal insulation porous body 25 is installed opposite to the upper surface of the left sliding door 30.

[0029] like Figure 3 and Figure 5 As shown, the lower frame 22 has: a pair of guide rails 22a, a step portion 22b, and a drain outlet 22c.

[0030] A pair of guide rails 22a guides the left-side sliding door 30. Specifically, the pair of guide rails 22a guides the door and window pulleys 33, which will be described later.

[0031] The step portion 22b is the part where the door and window rollers 33 (described later) fall in when the left sliding door 30 is closed, and where the door and window rollers 33 jump up when the left sliding door 30 is open. The step portion 22b is formed in a concave shape between a pair of guide rails 22a of the lower frame 22, at the location of the left sliding door 30 in the closed state (hereinafter also referred to as the "closed state"). The number of step portions 22b corresponds to the number of door and window rollers 33. Since the left sliding door 30 has two door and window rollers 33, two step portions 22b corresponding to the left sliding door 30 are formed. Furthermore, of the two step portions 22b corresponding to the left sliding door 30, the left step portion 22b is provided in a manner that is deeper than the right step portion 22b.

[0032] Drain outlet 22c is a through hole in the lower frame 22. Drain outlet 22c discharges condensate into the machine housing 50 via a drain pipe (not shown).

[0033] Furthermore, the upper frame 21 and lower frame 22 have the same structures for the right sliding door 40 as those for the left sliding door 30. The structures for the right sliding door 40 in the upper frame 21 and lower frame 22 are positioned further outward than those for the left sliding door 30. Additionally, the right sliding door 40 also has two door / window rollers 33, thus forming two steps 22b corresponding to the right sliding door 40. Furthermore, of the two steps 22b corresponding to the right sliding door 40, the right step 22b is deeper than the left step 22b.

[0034] like Figures 2 to 5 As shown, the left sliding door 30 has: a frame-shaped frame portion 31, a pair of glass panels 32 mounted on the frame portion 31, and two door / window rollers 33. The frame portion 31 has: an upper frame 31a, a left frame 31b, a right frame 31c, and a lower frame 31d. Furthermore, in Figures 2 to 5 The image shows the left sliding door 30 in the closed state.

[0035] The upper frame 31a has a pair of elongated portions 31a1. These elongated portions 31a1 are located at the front and rear ends of the upper surface of the upper frame 31a, forming the sidewalls of the water guide pipe. The right ends of the pair of elongated portions 31a1 are connected to each other by the upper end of the right frame 31c. That is, the upper surface of the upper frame 31a, from its rear end to its right end and then to its front end, is surrounded by the pair of elongated portions 31a1 and the right frame 31c. The upper surface of the upper frame 31a corresponds to the upper surface of the left sliding door 30.

[0036] The left frame 31b is formed as a rectangular cylinder extending vertically and open at both ends. The inner side of the left frame 31b is a drainage passage for condensate, described later. That is, a drainage passage is provided at the left end of the left sliding door 30. As described above, the drainage passage is cylindrical, but it could also be trough-shaped. Additionally, the left frame 31b has a cutout 31b1 formed by cutting out the upper end of its right side wall.

[0037] Two door and window rollers 33 are installed on the lower frame 31d. Of course, the number of door and window rollers 33 is not limited to two. By rolling the door and window rollers 33, the left sliding door 30 moves along a pair of guide rails 22a.

[0038] Additionally, a magnet 34, a water-permeable porous body 35, and a second water-permeable porous body 36 are installed on the upper surface of the left sliding door 30. The water-permeable porous body 35 and the second water-permeable porous body 36 are examples of "porous bodies".

[0039] Magnet 34 is installed at a position opposite to the opening / closing detection device 24 when the left sliding door 30 is closed. Magnet 34 causes the opening / closing detection device 24 to activate.

[0040] The permeable porous body 35 is a porous body with water permeability. The permeable porous body 35 is a foamed body with a continuous bubble structure. The permeable porous body 35 is formed, for example, from a polymer material such as polyethylene. The permeable porous body 35 is elastic. Furthermore, the permeable porous body 35 can also be formed from metals, non-woven fabrics, felt, wood, and ceramics.

[0041] The permeable porous body 35 is formed in a cuboid shape and is mounted to the left of the magnet 34. The upper end of the permeable porous body 35 is lower than the upper ends of the pair of elongated portions 31a1. The permeable porous body 35 is mounted on the upper surface of the left sliding door 30 (i.e., the upper surface of the upper frame 31a) facing the inside of the left frame 31b. As described above, the left frame 31b is formed as a cylinder with openings at both ends; therefore, the portion of the permeable porous body 35 located inside the left frame 31b extends downward and faces the lower frame 22.

[0042] Specifically, a permeable porous body 35 is installed from the upper surface of the left sliding door 30 to the left frame 31b. The permeable porous body 35 has an L-shaped form when viewed from the front and is installed between a pair of elongated portions 31a1 on the upper surface of the upper frame 31a, at the cutout portion 31b1, and on the inner circumferential surface of the left frame 31b. Furthermore, when the permeable porous body 35 is formed using a flexible component, it can also be installed by bending and pasting a straight component.

[0043] The second permeable porous body 36 is a porous body with permeability. The second permeable porous body 36 is formed of the same material as the permeable porous body 35. Alternatively, the material of the second permeable porous body 36 may be different from that of the permeable porous body 35.

[0044] The second permeable porous body 36 is formed in a cuboid shape and is mounted on the right side of the magnet 34 in the upper surface of the upper frame 31a. The upper surface of the second permeable porous body 36 is higher than the upper ends of the pair of elongated portions 31a1. Even when the left sliding door 30 is opened or closed, the second permeable porous body 36 will not come into contact with the opening / closing detection device 24 and the heat-insulating porous body 25.

[0045] Additionally, the left sliding door 30 includes: a sealing gasket 37, a pair of upper sealing members S2, and a pair of lower sealing members S3. The sealing gasket 37, the pair of upper sealing members S2, and the pair of lower sealing members S3 seal the left sliding door 30 and the frame body 20 when the left sliding door 30 is closed. Furthermore, in... Figure 2 In the diagram, sealing gasket 37 is indicated by a double-dotted line.

[0046] The sealing gasket 37 seals the space between the left sliding door 30 and the left longitudinal frame 23 when the left sliding door 30 is closed. The sealing gasket 37 is installed on the left side of the left frame 31b. The sealing gasket 37 contacts the left longitudinal frame 23 when the left sliding door 30 is closed.

[0047] A pair of upper sealing members S2 seal the left sliding door 30 and the upper frame 21 when the left sliding door 30 is closed. The pair of upper sealing members S2 are arranged on the upper frame 31a in a left-right direction. The front upper sealing member S2 contacts the protrusion 21a1 when the left sliding door 30 is closed. The rear upper sealing member S2 contacts the auxiliary sealing member S1 when the left sliding door 30 is closed.

[0048] A pair of lower sealing components S3 seal the left sliding door 30 and the lower frame 22 when the left sliding door 30 is closed. The pair of lower sealing components S3 contact the upper surface of the lower frame 22 when the left sliding door 30 is closed.

[0049] The right-side sliding door 40 is constructed in a manner symmetrical to the left-side sliding door 30. That is, the right frame of the right-side sliding door 40 is formed as a cylinder extending vertically and opening at both ends. A drainage passage is formed on the inner side of the right frame of the right-side sliding door 40. In other words, a drainage passage is provided at the right end of the right-side sliding door 40.

[0050] Furthermore, the permeable porous body 35 installed on the right-side sliding door 40 extends from the upper surface of the right-side sliding door 40 to the inner side of the right frame. Additionally, the shape and size of the permeable porous body 35 and the second permeable porous body 36 installed on the right-side sliding door 40 may differ from those installed on the left-side sliding door 30.

[0051] Next, the operation of the left sliding door 30 will be explained. When the left sliding door 30 is in the closed state, its door and window pulley 33 falls into the step portion 22b ( Figure 3 As described above, the left step portion 22b corresponding to the left sliding door 30 is provided with a greater depth than the right step portion 22b. Therefore, when the left sliding door 30 is closed, the upper surface of the left sliding door 30 slopes downward from top to bottom as it moves from right to left. That is, the left sliding door 30 in the closed state slopes downward with the left frame 31b side (i.e., the drainage passage side) located below in the upper surface. In addition, when the left sliding door 30 is closed, the sealing gasket 37, a pair of upper sealing members S2, and a pair of lower sealing members S3 seal the left sliding door 30 and the frame body 20.

[0052] As the left sliding door 30 moves to the right, the door and window rollers 33 jump onto the step 22b, and the left sliding door 30 is lifted upward by the height of the step 22b. As a result, the sealing gasket 37 separates from the left longitudinal frame 23, a pair of upper sealing members S2 separate from the protrusion 21a1 and the auxiliary sealing member S1, and a pair of lower sealing members S3 separate from the lower frame 22.

[0053] Furthermore, the second permeable porous body 36 is close to the upper frame 21. Specifically, the second permeable porous body 36 is close to the heat-insulating porous body 25. That is, when the left sliding door 30 is moved, the gap H1 between the second permeable porous body 36 and the heat-insulating porous body 25 is narrower than the gap H2 between the second permeable porous body 36 and the heat-insulating porous body 25 when the left sliding door 30 is closed. Figure 6 ).

[0054] The left sliding door 30 maintains the narrowed gap between the second permeable porous body 36 and the heat-insulating porous body 25, and moves to the right along a pair of guide rails 22a. Furthermore, when the right sliding door 40 is opened while it is in the closed state, it moves in the same direction as the left sliding door 30, except that it moves to the left, which is opposite to the left sliding door 30.

[0055] Next, the path of the condensate generated on the upper frame 21 above the left sliding door 30 when it is closed will be explained. Due to the temperature difference between the storage room and the outside air temperature, condensate is generated on the upper frame 21. The condensate is generated on the outer surface of the upper frame 21 and the surface of the insulating porous body 25. The condensate generated on the upper frame 21 gathers into water droplets and falls onto the second permeable porous body 36 and the upper surface of the upper frame 31a.

[0056] Condensate falling into the second permeable porous body 36 flows through the second permeable porous body 36 and out to the upper surface of the upper frame 31a. Furthermore, as described above, when the left sliding door 30 is closed, the upper surface of the left sliding door 30 slopes downwards from right to left. Therefore, by means of the pair of elongated portions 31a1 and the right frame 31c, condensate flowing out to the upper surface of the upper frame 31a and condensate falling from the upper frame 21 onto the upper surface of the upper frame 31a will flow to the left, and will not flow down to the front, rear, and right sides of the left sliding door 30.

[0057] The condensate flowing to the left on the upper surface of the upper frame 31a reaches the permeable porous body 35. The condensate that reaches the permeable porous body 35 flows out through the permeable porous body 35 and out to the inside of the left frame 31b. As described above, the permeable porous body 35 is a continuous bubble structure, and therefore, it functions as a resistive body against the flow of condensate.

[0058] That is, by using the permeable porous body 35, the flow momentum of condensate is suppressed. As a result, the flow rate of condensate flowing from the upper surface of the upper frame 31a to the inner side of the left frame 31b, i.e., the flow rate per unit time, is suppressed.

[0059] Condensate flowing into the inner side of the left frame 31b passes through the inner side of the left frame 31b and flows out into the lower frame 22, exiting through the drain outlet 22c into the machine housing 50. To minimize the impact of the environment within the machine housing 50 on the overall environment of the cold storage, the drain outlet 22c is set to the minimum size required. If the flow rate of condensate per unit time is not suppressed, once a large amount of condensate is supplied around the drain outlet 22c, the condensate cannot pass smoothly through the drain outlet 22c and will expand on the upper surface of the lower frame 22. Once the condensate expands, condensate located far from the drain outlet 22c cannot move to it. That is, a portion of the condensate will not be drained and will remain on the upper surface of the lower frame 22. On the other hand, in the cold storage 1 of this embodiment, the flow rate of condensate per unit time is suppressed. Specifically, the flow rate is suppressed below the flow rate that allows water to pass smoothly through the drain outlet 22c. Because the permeable porous body 35 suppresses the flow rate of condensate per unit time, the condensate will not remain in the lower frame 22 and will be discharged from the drain outlet 22c. Therefore, the drainage performance of condensate can be improved by using the permeable porous body 35. That is, preferably, the material and size of the permeable porous body 35 are determined and set in such a way that the flow rate of condensate passing through the permeable porous body 35 per unit time is lower than the flow rate of condensate that can pass through the drain outlet 22c by gravity alone.

[0060] Furthermore, as described above, when the left sliding door 30 moves, the second permeable porous body 36 approaches the heat-insulating porous body 25. Thus, as... Figure 6 As shown, the second permeable porous body 36 scrapes away water droplets W of condensation present on the surface of the heat-insulating porous body 25. This prevents condensation from falling onto the samples when the left sliding door 30 is opened and samples are taken from the storage room.

[0061] Furthermore, as described above, the right-side sliding door 40 is constructed in a manner symmetrical to the left-side sliding door 30. Additionally, the right-side step portion 22b corresponding to the right-side sliding door 40 is deeper than the left-side step portion 22b. Therefore, when the right-side sliding door 40 is closed, its upper surface slopes downwards from left to right. Consequently, condensation on the upper surface of the right-side sliding door 40, like condensation on the upper surface of the left-side sliding door 30, passes through the permeable porous body 35 and flows out through the inner side of the right frame to the lower frame 22. Furthermore, the second permeable porous body 36 installed on the right-side sliding door 40, like the second permeable porous body 36 installed on the left-side sliding door 30, scrapes away water droplets of condensation generated on the heat-insulating porous body disposed opposite to the upper surface of the right-side sliding door 40.

[0062] This disclosure is not limited to the embodiments described herein. Various modifications and combinations thereof with the embodiments described herein are also included within the scope of this disclosure without departing from its spirit.

[0063] For example, the upper frame 31a may have a permeable porous body 35 and a second permeable porous body 36 installed on its upper surface, but the second permeable porous body 36 may not be installed. Alternatively, a porous body may be installed by combining the permeable porous body 35 and the second permeable porous body 36 into one integrated structure. Furthermore, in addition to the permeable porous body 35 and the second permeable porous body 36, other permeable porous bodies may be further installed.

[0064] Furthermore, the size of the gap between the second permeable porous body 36 and the heat-insulating porous body 25 when the left sliding door 30 moves can differ from the size of the gap between the second permeable porous body 36 and the heat-insulating porous body 25 when the right sliding door 40 moves. For example, regarding the left sliding door 30 and the right sliding door 40, which are more prone to condensation, the gap between the second permeable porous body 36 and the heat-insulating porous body 25 can be narrowed. Therefore, regarding the left sliding door 30 and the right sliding door 40, which are more prone to condensation, the second permeable porous body 36 can more easily scrape away the condensate.

[0065] Alternatively, the heat-insulating porous body 25 may not be installed on the upper frame 21. When the heat-insulating porous body 25 is not installed on the upper frame 21, the second water-permeable porous body 36 is formed such that when the left sliding door 30 and the right sliding door 40 move, the second water-permeable porous body 36 approaches the part of the upper frame 21 opposite to the second water-permeable porous body 36 and scrapes off the water droplets of condensation.

[0066] In addition, the permeable porous body 35 has an L-shaped shape ( Figure 2 However, it can also be like... Figure 7As shown, it has a straight shape. Therefore, the permeable porous body 35 can be easily manufactured. Furthermore, since the permeable porous body 35 is formed in a flexible shape, it can be easily installed without bending. Additionally, as... Figure 7 As shown, when the upper end of the left frame 31b is at the same height as the upper surface of the upper frame 31a, the permeable porous body 35, which is formed in a straight line, is not disposed on the inner side of the left frame 31b, but is disposed in a manner that extends above the inner side of the left frame 31b and faces the inner side of the left frame 31b, and the permeable porous body 35 faces the lower frame 22.

[0067] Additionally, while the inner side of the left frame 31b provides a drainage passage for condensate, a drainage passage can also be provided on the inner side of the right frame 31c. In this case, the right frame 31c is cylindrical like the left frame 31b, and the porous body is installed on the upper surface of the upper frame 31a with the permeable porous body facing the inner side of the right frame 31c. When drainage passages are provided on both the inner sides of the left frame 31b and the right frame 31c, the depths of the two steps 22b corresponding to the left sliding door 30 can be equal, ensuring that the upper surface of the left sliding door 30 is not tilted when closed (i.e., approximately horizontal). Alternatively, drainage passages can be provided only on the inner side of the right frame 31c, and not on the inner side of the left frame 31b. When drainage passages are provided only on the inner side of the right frame 31c, the upper surface of the left sliding door 30 can be tilted downwards from left to right when the left sliding door 30 is closed. In this case, among the two step portions 22b corresponding to the left sliding door 30, the right step portion 22b is set to be deeper than the left step portion 22b.

[0068] Alternatively, the left sliding door 30 and the right sliding door 40 may not have a pair of elongated portions 31a1.

[0069] Additionally, the door and window rollers 33 are installed on the lower frame 31d, but they can also be installed on the upper frame 31a. When the door and window rollers 33 are installed on the upper frame 31a, the left sliding door 30 and the right sliding door 40 are configured as suspended sliding doors. Alternatively, the left sliding door 30 and the right sliding door 40 may not have the door and window rollers 33. Furthermore, by adjusting the installation position of the door and window rollers 33, the left sliding door 30 and the right sliding door 40 can be tilted so that the drainage passage side of the upper surface is downward, even during movement.

[0070] The entire contents of the description, claims, drawings and abstract contained in Japanese Patent Application No. 2021-038276, filed on March 10, 2021, are incorporated herein by reference.

[0071] Industrial applicability

[0072] This disclosure can be widely applied to cold storage facilities such as pharmaceutical cold storage, blood cold storage, and thermostats.

[0073] Explanation of reference numerals in the attached figures

[0074] 1. Cold storage

[0075] 10 enclosures

[0076] 20 Frame

[0077] 21. Upper frame (top part)

[0078] 22b Step section

[0079] 25. Thermally insulating porous body (secondary porous body)

[0080] 30. Left-side sliding door (sliding door)

[0081] 31 Frame

[0082] 31a Top frame

[0083] 31a1 Slender part

[0084] 33 Door and window pulleys

[0085] 35 water permeable porous body (porous body)

[0086] 36 Second permeable porous body (porous body)

[0087] 40. Right-side sliding door (sliding door)

[0088] H opening

Claims

1. A cold storage facility, characterized in that, have: The box has an opening at the front; A frame body that surrounds the opening along the opening; A sliding door, installed in the frame, has a drainage passage extending in the vertical direction at least one of the left and right ends; as well as A porous body is installed on the upper surface of the sliding door in a manner facing the drainage passage and is permeable to water.

2. The cold storage facility as described in claim 1, wherein, The porous body is a foam with a continuous bubble structure.

3. The cold storage facility as described in claim 1 or 2, wherein, The porous body is installed from the upper surface of the sliding door into the drainage passage.

4. The cold storage facility as described in claim 1 or 2, wherein, The sliding door has a pair of elongated portions located on the front and rear sides of the upper end of the sliding door, which together form a water guide pipe.

5. The cold storage facility as described in claim 1 or 2, wherein, The sliding door has door and window pulleys. The frame has a stepped section, into which the door and window rollers fall when the sliding door is closed, and onto the stepped section when the sliding door is opened. The porous body is located near the upper part of the frame when the sliding door is opened.

6. The cold storage facility as described in claim 1 or 2, wherein, It also has a second porous body, which is installed on the frame body opposite to the upper surface of the sliding door in the closed state, and has heat insulation properties.

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