JP2015014445A - Low-temperature warehouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-temperature warehouse capable of inhibiting dew condensation on a ceiling and ann inner wall of a low-temperature chamber by a simple structure.SOLUTION: A low-temperature warehouse includes: a low-temperature chamber 12 that comprises an openable/closable arrival/delivery opening 12A; cooling means 14 for cooling the inside of the low-temperature chamber 12; an inclined plate 18 that is provided below a ceiling 12B of the low-temperature chamber 12 and inclined downward toward the back side of the low-temperature chamber 12 from the arrival/delivery opening 12A; and a dew condensation water discharge part 26 that is provided at a lower end of the inclined plate 18 and that discharges dew condensation water, flowing down along the inclined plate 18, to the outside of the low-temperature chamber 12.

Description

  The present invention relates to a low temperature warehouse for storing articles at a low temperature.

  As a low temperature warehouse having a cargo room (cold room) whose room temperature is lower than the outside air, a low temperature warehouse having a dehumidification chamber is disclosed between a dock shelter to which a truck is attached and a cargo room (for example, patent document) 1).

JP 2002-303477 A

  In invention of the said patent document 1, the external air which flowed into the dehumidification chamber from the dock shelter is sucked with a unit cooler, cooled, and discharged to the dehumidification chamber, thereby suppressing condensation in the cargo compartment. However, there is a possibility that the cargo room becomes narrow by the space of the dehumidifying chamber, and the working environment is deteriorated. Moreover, the equipment for dehumidification becomes large-scale, and it is difficult to reduce equipment costs and running costs.

  In view of the above facts, an object of the present invention is to provide a low-temperature warehouse that can suppress condensation on the ceiling and inner wall of a low-temperature chamber with a simple structure.

  The low-temperature warehouse according to claim 1 is provided in a low-temperature chamber having an openable and closable receipt / shipment port, cooling means for cooling the inside of the low-temperature chamber, and a ceiling below the low-temperature chamber, and the receipt / shipment port An inclined plate inclined downward toward the back side of the low temperature chamber, and a dew condensation water drainage portion provided at a lower end portion of the inclined plate, for draining the condensed water flowing down the inclined plate to the outside of the low temperature chamber, Have.

  According to the low temperature warehouse of the first aspect, the low temperature chamber is provided with an open / close port that can be opened and closed, and the load / unload port can be opened to load / unload the cargo into the low temperature chamber. Further, the inside of the low temperature chamber is cooled by the cooling means and maintained at a low temperature, and the temperature is lower than the outside air.

  Here, below the ceiling of the low temperature chamber, an inclined plate is provided that is inclined downward from the receipt / shipment port toward the back side of the low temperature chamber. As a result, when outside air flows into the low-temperature room from the inlet / outlet, the high temperature outside air rises due to the difference in gravity and is blocked by the inclined plate and stays under the inclined plate. And since the temperature of an inclination board is lower than external air, the lower surface of the inclination board which contacted external air will condense. The condensed water adhering to the lower surface of the inclined plate flows down the lower surface of the inclined plate, reaches the condensed water drainage portion, and is drained outside the low temperature room by the condensed drainage portion. In this way, it is possible to suppress condensation on the ceiling and the inner wall of the low temperature chamber by positively condensing the humid outside air and draining the dew condensation water to the outside of the low temperature chamber.

  Further, since the inclined plate is inclined downward from the receipt / shipment port toward the back side of the low temperature chamber, it is possible to suppress the outside air flowing in from the receipt / shipment port from entering the back side of the low temperature chamber. Further, since the outside air is dehumidified by condensing the inclined plate, no power is required unlike the method of providing a dehumidifying chamber and cooling the outside air with a unit cooler or the like, and energy saving can be achieved.

  A low temperature warehouse according to a second aspect is the low temperature warehouse according to the first aspect, wherein the cooling means is a blower that blows cold air onto the upper surface of the inclined plate.

  According to the low temperature warehouse described in claim 2, the inclined plate can be efficiently lowered to a temperature close to the dew point by blowing cold air from the blower to the inclined plate. Further, the draft of the worker can be reduced as compared with the case where the cold air is directly blown to the worker who performs the cargo handling.

  The low temperature warehouse according to claim 3 is the low temperature warehouse according to claim 1 or 2, further comprising air supply means for supplying dry air to the low temperature chamber to make the inside of the low temperature chamber positive pressure. ing.

  According to the low temperature warehouse according to claim 3, it is possible to prevent the outside air from flowing into the low temperature chamber by setting the low temperature chamber to a positive pressure. Moreover, since the humidity of the low temperature chamber is reduced by the dry air, it is possible to suppress dew condensation on the ceiling and the inner wall of the low temperature chamber.

  Since the low-temperature warehouse of the present invention has the above-described configuration, it is possible to suppress dew condensation on the ceiling and inner wall of the low-temperature chamber with a simple structure.

It is a sectional side view of the low-temperature warehouse which concerns on embodiment of this invention. It is a sectional side view which shows the state immediately after the shutter of the low-temperature warehouse which concerns on embodiment of this invention opened. It is a sectional side view which shows the state into which external air flowed into the condensation induction shell. It is a sectional side view showing the state where the dehumidified outside air is pushed out of the low temperature warehouse.

  A low temperature warehouse 10 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the low temperature warehouse 10 according to this embodiment mainly includes a cargo compartment (cold chamber) 12, a unit cooler 14, an air conditioning duct 16, and a dew condensation induction shell 18. The cargo handling room 12 is a room for sorting goods such as food conveyed by a truck, is provided adjacent to a refrigerator or a freezer, and is maintained at a predetermined temperature. Further, heat insulating materials such as Styrofoam (registered trademark) are disposed on the wall surface, ceiling, and floor surface of each low temperature chamber including the cargo handling chamber 12 to insulate the low temperature chambers from each other.

  Luggage sorted in the cargo compartment 12 is transported to a refrigerator or freezer maintained at a predetermined cold temperature and stored until shipment. At the time of shipment, the luggage is transported from the refrigerator or freezer to the luggage compartment 12, loaded on a truck and shipped.

  On the wall surface adjacent to the outside of the low temperature warehouse 10 (the wall surface on the left side in the figure), a loading / unloading port 12A for the cargo compartment 12 is formed. A plurality of receipt / shipment ports 12A are provided along the wall surface of the low-temperature warehouse 10, and a truck can come in contact with each receipt / shipment port 12A. The receipt / shipment port 12 </ b> A can be opened and closed by a shutter 20.

  The shutter 20 is a plate-like member that is formed slightly larger than the receipt / shipment port 12 </ b> A. In this embodiment, an oversliding shutter 20 that slides along the rail 22 is used as an example. Further, the shutter 20 has a heat insulating property so as to block outside air.

  Here, regarding the material of the shutter 20, in this embodiment, as an example, a hard urethane foam having heat insulation is used as a base material, and the front and back surfaces of the base material are covered with a hard resin heat insulating material to constitute the shutter 20. However, the material of the shutter 20 is not specified as long as it has heat insulation properties. In this embodiment, the oversliding shutter 20 is used. However, the present invention is not limited to this, and a shutter having another structure may be used. For example, a winding shutter may be used.

  A dock shelter 24 is provided outside the shutter 20 so as to surround the receipt / shipment port 12A. The dock shelter 24 is formed on the outer wall of the low temperature warehouse 10 and includes a pad having cushioning properties.

  The truck 100 is brought into contact with the dock shelter 24 to carry in / out the cargo (see FIG. 2). At this time, the gap between the receipt / shipment port 12 </ b> A and the truck 100 is blocked by the dock shelter 24, and the outside air and pests are prevented from entering the cargo handling chamber 12.

  In this embodiment, a soft urethane foam pad is used as the material of the dock shelter 24. However, the present invention is not limited to this, and a dock shelter of another material may be used, for example, a soft polyurethane dock shelter. May be used. In the present embodiment, a fixed dock shelter is used. However, the present invention is not limited to this, and a movable dock shelter in which a part of the dock shelter is movable according to the height of the truck 100 is used. May be.

  A unit cooler 14 as a cooling means is provided on the ceiling (upper right in the figure) on the far side of the cargo compartment 12. The unit cooler 14 is a blower that blows cooled air into the interior of the cargo compartment 12 to maintain the cargo compartment 12 at a predetermined room temperature. In this embodiment, as an example, the unit cooler 14 Is blowing. In addition, the room temperature of the cargo handling room 12 is controlled to be maintained at 0 degrees.

  The unit cooler 14 blows air in a substantially horizontal direction along the ceiling 12B to the wall surface on the receipt / shipment port 12A side, and blows cold air onto the upper surface of the dew condensation inducing shell 18 described later. In the present embodiment, the cargo compartment 12 is maintained at 0 degrees by the unit cooler 14, but the present invention is not limited to this, and the cargo compartment 12 may be maintained at a room temperature lower than 0 degrees. The unit cooler 14 may be controlled to maintain at 5 degrees. Conversely, the cargo compartment 12 may be maintained at a room temperature higher than 0 degrees. For example, the unit cooler 14 may be controlled so as to maintain the room temperature at 5 degrees.

  An air conditioning duct 16 as an air supply means is provided on the inlet / outlet port 12A side (left side in the figure) from the unit cooler 14. The air conditioning duct 16 is connected to a desiccant air conditioning unit (not shown), and the dehumidified dry air is supplied to the cargo handling chamber 12 through the desiccant air conditioning unit. Here, the cargo compartment 12 is set to a positive pressure by the dry air supplied from the air conditioning duct 16, and suppresses the outside air from flowing into the cargo compartment 12.

  A dew condensation inducing shell 18 as an inclined plate is provided below the ceiling 12B of the cargo compartment 12. The dew condensation inducing shell 18 is a bowl-shaped plate material formed of a coated rigid plate, and is continuous from one end to the other end of the cargo compartment 12 with the depth direction of the cargo compartment 12 (the depth direction on the paper) as the longitudinal direction. Is formed.

  Also, one end of the dew condensation inducing shell 18 in the short direction (left and right in the drawing) is supported by the inner wall 12C on the receipt / shipment port 12A side, and the other end is inclined downward toward the opposing inner wall 12D. ing. In the present embodiment, the dew condensation inducing shell 18 that is inclined linearly is used as an example. However, the present invention is not limited to this, and a shape curved from the upper side to the lower side may be used.

  The other end portion in the short-side direction of the dew condensation inducing shell 18 extends downward to form a vertical wall 18B, and a receptacle 26 constituting a dew condensation water drainage portion is vertically formed at the lower end portion of the vertical wall 18B. It is formed integrally with the wall 18B. The receptacle 26 has a substantially U-shaped cross section, and is configured to collect condensed water that has fallen along the lower surface 18A of the condensation-inducing shell 18. The receptacle 26 is inclined to the depth direction in the figure and connected to a drain pipe (not shown) so that the condensed water collected can be drained to the outside of the cargo compartment 12.

  In the present embodiment, the condensation inducing shell 18 made of a coated rigid plate is used. However, the present invention is not limited to this, and the condensation inducing shell may be formed of another metal or resin. In the present embodiment, the side walls are not formed at both ends in the longitudinal direction of the condensation inducing shell 18, but the side walls may be formed by bending both ends of the condensation inducing shell 18 downward. In this case, in order to receive the dew condensation water which falls along a side wall, it is necessary to arrange | position a receptacle also under the side wall.

  Next, the operation of the dew condensation inducing shell 18 according to the present embodiment will be described through the description of the procedure for carrying the load into the luggage compartment 12. The same applies to the case where the luggage is carried out from the cargo compartment 12. Moreover, in the following description, the case where the temperature of external air is higher than the room temperature of the cargo compartment 12 is demonstrated. When the temperature of the outside air is lower than the room temperature of the cargo compartment 12, no condensation occurs even if the outside air flows into the cargo compartment 12, and it is not necessary to take measures to suppress the condensation.

  When a package is carried into the cargo compartment 12 from the truck 100 loaded with a package of cooled food or the like, the truck 100 is brought into contact with the dock shelter 24 as shown in FIG. Thereby, the clearance gap between 12 A of receipt / shipment ports and the loading platform of the truck 100 is obstruct | occluded with the dock shelter 24, and invasion of external air and a pest can be suppressed to some extent. After arriving at the truck 100, the shutter 20 is opened to open the receipt / shipment port 12 </ b> A, and the worker P unloads the cargo from the loading platform of the truck 100.

  At this time, outside air confined in the space between the track 100 and the shutter 20 flows into the cargo handling chamber 12 from the receipt / shipment port 12A. Even when the gap between the truck 100 and the receipt / shipment port 12 </ b> A is closed by the dock shelter 24, some outside air flows into the cargo handling chamber 12 from the gap between the dock shelter 24 and the truck 100. Here, since the cargo handling chamber 12 is made positive pressure by the dry air supplied from the air conditioning duct 16, it can reduce the amount of outside air flowing in compared with the case where it is not made positive pressure. .

  Since the outside air that has flowed into the cargo compartment 12 from the receipt / shipment port 12A has a temperature higher than the room temperature of the cargo compartment 12, it rises due to the difference in gravity. The rising outside air is blocked by the condensation-inducing shell 18 and stays under the condensation-inducing shell 18.

  At this time, the outside air contacts the lower surface 18 of the condensation inducing shell 18, and the outside air is condensed on the lower surface 18 </ b> A due to a temperature difference between the outside air and the condensation inducing shell 18. Here, in this embodiment, since the cool air is directly blown from the unit cooler 14 to the upper surface of the condensation inducing shell 18, the temperature of the condensation inducing shell 18 is lower than the room temperature of the cargo compartment 12, and the condensation inducing shell 18 18 can be positively condensed. In other words, the outside air can be efficiently dehumidified.

  Moreover, the flow of the dry air supplied from the air conditioning duct 16 to the cargo compartment 12 is calculated in advance by an air flow simulation, and the position of the air conditioning duct 16 is determined based on the result of the air flow simulation. In other words, the air-conditioning duct 16 is provided at a position where the dry air supplied from the air-conditioning duct 16 obstructs the flow of the outside air staying under the dew condensation inducing shell 18 so that the outside air stays for a long time. Has been. Thereby, outside air will flow out from the dew condensation induction shell 18 after fully dehumidifying.

  Here, as shown in FIG. 3, the condensed water adhering to the lower surface 18A of the condensation inducing shell 18 due to condensation flows down from the upper side to the lower end of the condensation inducing shell 18 as shown by the arrows in the figure. To do. The condensed water gathered at the lower end of the condensation-inducing shell 18 adheres to become large particles, and falls into a receptacle 26 provided below the condensation-inducing shell 18. Alternatively, it reaches the receiving rod 26 through the vertical wall 18B. In this way, the dew condensation collected at the receptacle 26 is drained to the outside of the cargo compartment 12 through a drain pipe (not shown).

  Here, in this embodiment, since the dew condensation inducing shell 18 is formed of a coated rigid plate, the surface is easy to slip, and dew condensation water flows down smoothly to the lower end of the dew condensation inducing shell 18. In addition, the painted rigid plate is more cleanable than the solid rigid plate, so maintenance can be improved. Furthermore, if a material having an antifungal effect is applied as a coating agent, generation of mold can be suppressed.

  As shown in FIG. 4, the outside air dehumidified by the condensation-inducing shell 18 flows downward from the condensation-inducing shell 18. Then, it is carried to the receipt / shipment port 12 </ b> A by the airflow of the cold air blown from the unit cooler 14 and pushed out to the outside of the cargo handling chamber 12. Even if the outside air contacts the ceiling 12B or the inner wall of the cargo compartment 12 during this time, the outside air is already dehumidified, so that the ceiling 12B or the inner wall of the cargo compartment 12 does not condense.

  Note that the length and inclination angle of the condensation-inducing shell 18 are designed based on the result of the simulation of the inflow of outside air so that the outside air that has flowed into the condensation-inducing shell 18 and the condensation-inducing shell 18 effectively contact each other. Is formed. For this reason, when the size of the receipt / shipment port 12A and the installation height of the condensation inducing shell 18 are changed, the length and the inclination angle of the condensation inducing shell 18 may be redesigned.

  Further, since the unit cooler 14 blows air toward the dew condensation induction shell 18 in a substantially horizontal direction, cold air is not directly blown to the worker P who works in the cargo compartment 12. Thereby, the draft of worker P can be reduced and it can be set as the working environment which does not feel stress. Furthermore, since the cool air blown from the unit cooler 14 flows along the ceiling 12B, it is possible to suppress the retention of high-temperature air on the ceiling 12B.

  In this embodiment, the air-conditioning duct 16 supplies dry air from the desiccant air-conditioning unit to the cargo compartment 12, but not limited to this, air from a general air-conditioning unit is supplied to the cargo compartment 12. The structure to do may be sufficient.

  Further, in the present embodiment, the dew condensation inducing shell 18 is a flat plate member that is inclined from the wall surface on which the receipt / shipment port 12A is formed toward the opposite wall surface, but is not limited thereto, and may have other shapes. . For example, a shape in which a bent portion is provided at a central portion in the longitudinal direction of the dew condensation inducing shell 18 and the both ends are inclined downward with the bent portion as a boundary may be employed. In this case, the dew condensation water adhering to the lower surface 18 </ b> A of the dew condensation inducing shell 18 flows down toward one end side or the other end side in the longitudinal direction of the dew condensation inducing shell 18 while moving toward the back side of the cargo handling chamber 12. For this reason, it is necessary to separately provide the catch 26 at both ends in the longitudinal direction of the dew condensation inducing shell 18.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect. For example, a cooling means dedicated to cooling the condensation inducing shell 18 may be separately provided in the vicinity of the condensation inducing shell 18.

10 Low temperature warehouse 12 Cargo room (low temperature room)
12A loading / unloading port 14 unit cooler (cooling means, blower)
16 Air conditioning duct (air supply means)
18 Condensation-inducing shell (inclined plate)
26 Receipt (condensate drainage)

Claims (3)

A low temperature room with an openable and closable receipt / shipment port,
Cooling means for cooling the inside of the low temperature chamber;
An inclined plate provided below the ceiling of the low temperature chamber and inclined downward from the receipt / shipment port toward the back side of the low temperature chamber;
A dew condensation water drainage section provided at the lower end of the tilt plate and draining the dew condensation water flowing down the tilt plate to the outside of the low temperature chamber;
Having a low temperature warehouse.   The low-temperature warehouse according to claim 1, wherein the cooling means is a blower that blows cold air onto an upper surface of the inclined plate.   The low-temperature warehouse according to claim 1 or 2, further comprising air supply means for supplying dry air to the low-temperature chamber to make the inside of the low-temperature chamber have a positive pressure.

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