JP7220019B2 - Warehouse - Google Patents

Description

TECHNICAL FIELD The present invention relates to a warehouse, and more particularly to a warehouse that stores a plurality of items at room temperature.

Warehouses such as distribution warehouses generally do not have air-conditioning equipment, and multiple items are stored at room temperature. Many of such room-temperature warehouses are equipped with a ventilation fan for ventilating the air in the internal space (indoor space), but are not equipped with a dehumidifier or the like.

From the viewpoint of dehumidification, as described in Japanese Patent Application Laid-Open No. 2011-149604 (Patent Document 1), in a cargo handling area of a cold storage where low-temperature and low-humidity air is supplied, the opening height of the cargo loading/unloading entrance is higher than the opening height. discloses a technique for preventing dew condensation in the cargo handling area of a refrigerated warehouse by installing an air blower that blows the air in the cargo handling area obliquely downward toward the entrance/exit door of the warehouse.

JP 2011-149604 A

In a normal temperature warehouse, articles are generally packed in cardboard and stored. In other words, in the internal space of the warehouse, stored items composed of items and cardboard boxes for packing the items are accommodated. Corrugated cardboard is susceptible to humidity, and if the humidity in the interior space of the warehouse becomes too high, the humidity may cause the corrugated cardboard to deteriorate.

Therefore, it is conceivable to install a dehumidifier inside the warehouse.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a warehouse capable of reducing humidity in the internal space while saving energy.

A warehouse according to one aspect of the present invention is a warehouse having an internal space in which a plurality of stored items are stored, and includes a ventilation fan for ventilating the air in the internal space, and a ventilation fan disposed above the internal space. and an air circulator for sending an air flow into the gap between.

Preferably, the warehouse further comprises a first humidity sensor for detecting humidity in the internal space, and a control device for driving the air circulator when the relative humidity in the internal space is equal to or higher than a predetermined value.

More preferably, the warehouse further comprises a second humidity sensor for detecting the humidity of the outdoor space, and the controller drives the ventilation fan when the absolute humidity of the outdoor space is equal to or less than the absolute humidity of the internal space.

If the internal space is divided into a plurality of areas in plan view, it is desirable to provide an air circulator for each area.

When the internal space is divided into a plurality of areas in plan view, it is also desirable that both the air circulator and the first humidity sensor are provided for each area.

The warehouse may further comprise a dirt floor. In this case, the air circulator preferably blows air toward the dirt floor.

According to the present invention, it is possible to reduce moisture in the internal space while saving energy.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows schematic structure of the warehouse which concerns on embodiment of this invention. 4 is a flow chart showing processing executed by the control device according to the embodiment of the present invention; FIG. 4 is a plan view schematically showing an arrangement example of a plurality of air circulators; 4 is a graph showing a comparison of temperature transition patterns in a warehouse and outdoor temperature transition patterns in winter and spring.

An embodiment of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

(About composition)
First, a configuration example of a warehouse 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing a schematic configuration of a warehouse 1 according to this embodiment.

The warehouse 1 has an internal space 3 surrounded by a dirt floor 21 , an outer wall 22 and a ceiling 23 . In this internal space 3, a large number of storage items 91 are accommodated at room temperature. In this embodiment, stored items 91 are piled up on the dirt floor 21, and a large number of stored items 91 are divided into a plurality of groups (groups) and managed. Hereinafter, the group of stored items 91 arranged in the internal space 3 will be referred to as a "stored item group 9".

A gap 90 is provided between the storage object groups 9 adjacent to each other in plan view so that a person can pass through. A gap 90 represents a gap between storage items 91 adjacent to each other in the horizontal direction. In addition, since the objects 91 to be stored are not placed directly on the dirt floor 21 but are placed via a pallet (not shown) having air permeability, there is also space between the earth floor 21 and the objects 91 to be stored. A gap 92 is provided.

Pallets (not shown) are appropriately interposed between the stored items 91 in each stored item group 9 as well. Therefore, an appropriate gap (not shown) is also provided between the storage items 91 adjacent in the height direction. The pallets may be inserted in each row or in multiple rows.

The outer wall 22 of the warehouse 1 includes outer wall portions 22a and 22b facing each other. A ventilation fan 41 for ventilating the air in the internal space 3 is provided on the outer wall portion 22a. Ventilation fan 41 is, for example, an air supply fan. The outer wall portion 22b is provided with an exhaust port 42 such as a louver. Therefore, outside air is supplied to the internal space 3 by driving the ventilation fan 41 , and the air in the internal space 3 is exhausted to the outside through the exhaust port 42 . The ventilation fan 41 and the exhaust port 42 are provided at approximately the same height.

The ventilation fan for ventilating the internal space 3 is not limited to an air supply fan, and may be an exhaust fan. Alternatively, both an intake fan and an exhaust fan may be included.

Here, the internal space 3 of the warehouse 1, which has a large heat capacity, is not easily affected by the outside air temperature (especially in the central portion far from the outer wall 22), so as shown in FIG. changes later than the temperature change of Therefore, during the rainy season in early spring, the temperature of the internal space 3 is lower than the outside air temperature. In this state, if the humidity in the cold internal space 3 rises, there is a risk of dew condensation or mold.

Therefore, in addition to the ventilation fan 41, the warehouse 1 according to the present embodiment includes the air circulator 5, the humidity sensor (first humidity sensor) 61 for detecting the humidity in the internal space 3, and the humidity in the outdoor space. and a humidity sensor (second humidity sensor) 62 for

The air circulator 5 is a device that generates highly straight wind. Since the air in the internal space 3 can be circulated by driving the air circulator 5, the humidity in the internal space 3 can be reduced.

Air circulator 5 is typically provided on ceiling 23 . Therefore, an air flow can be sent from above into the gap 90 between the storage object groups 9 . As a result, the fluidity of the air in the gap 90 between the stored object groups 9 can be improved, so the humidity in the gap 90 where moisture tends to accumulate can be efficiently lowered.

In addition, since a gap 92 is also interposed between the dirt floor 21 and the group of stored items 9, the air sent into the gap 90 from above passes through the gap 92 on the dirt floor 21 and passes through other gaps 90 or It is sent to passage 30. Also, the air flows into the gaps between the stored articles 91 adjacent in the height direction. Therefore, air can be appropriately circulated in the internal space 3 by driving the air circulator 5 arranged above the internal space 3 . The passage 30 is a space wider than the gap 90, and is a space through which equipment such as a forklift can pass.

It is desirable that the ventilation path by the ventilation fan 41 provided on the outer wall 22 and the ventilation path by the air circulator 5 do not intersect three-dimensionally. Specifically, the position of the air circulator 5 in plan view is from the straight line connecting the ventilation fan 41 as the air supply section arranged on the outer wall section 22a and the exhaust port 42 as the exhaust section arranged in the outer wall section 22b. preferably away. As a result, the internal space 3 can be properly ventilated and air circulated.

Humidity sensor 61 detects the relative humidity and absolute humidity of internal space 3 . Specifically, the humidity sensor 61 includes, for example, a detection unit that detects the relative humidity, temperature, and atmospheric pressure of the internal space 3, and the absolute humidity of the internal space 3 based on the detected relative humidity, temperature, and atmospheric pressure. and a calculating unit that calculates

A humidity sensor 62 detects the absolute humidity of the outdoor space. Specifically, the humidity sensor 62 calculates the absolute humidity of the outdoor space based on, for example, a detection unit that detects the relative humidity, temperature, and atmospheric pressure of the outdoor space, and the detected relative humidity, temperature, and atmospheric pressure. and a calculator for

Ventilation fan 41 , air circulator 5 , and humidity sensors 61 and 62 are electrically connected to control device 7 . The control device 7 controls driving (ON/OFF) of the ventilation fan 41 and the air circulator 5 based on detection signals obtained from the humidity sensors 61 and 62 . The control device 7 is composed of a general computer including a memory and a processor. The functions of the calculators included in the humidity sensors 61 and 62, that is, the function of calculating the absolute humidity, may be implemented by this computer.

(About dehumidification treatment)
Next, a method for dehumidifying the internal space 3 of the warehouse 1 will be described with reference to FIG. FIG. 2 is a flow chart showing the processing executed by the control device 7 in this embodiment.

Based on the signal from the humidity sensor 61, the controller 7 detects the indoor (internal space 3) relative humidity RH and the absolute humidity Xi, and based on the signal from the humidity sensor 62, the outdoor absolute humidity Xo. Detect (step S1).

When the control device 7 determines that the indoor relative humidity RH is equal to or higher than a predetermined value (for example, 70%) and the outdoor absolute humidity Xo is equal to or lower than the indoor absolute humidity Xi (YES in steps S2 and S3). ), both the air circulator 5 and the ventilation fan 41 are driven (step S5). Thereby, circulation and ventilation of the air in the internal space 3 are performed.

When the controller 7 determines that the indoor relative humidity RH is equal to or higher than the predetermined value and that the outdoor absolute humidity Xo is higher than the indoor absolute humidity Xi (YES in step S2, NO in step S3). , drives only the air circulator 5 (step S6). As a result, the internal space 3 is not ventilated, and only the air in the internal space 3 is circulated.

When the controller 7 determines that the indoor relative humidity RH is less than the predetermined value and the outdoor absolute humidity Xo is equal to or lower than the indoor absolute humidity Xi (NO in step S2, YES in step S4). , only the ventilation fan 41 is driven (step S7). As a result, air circulation in the internal space 3 is not performed, and only ventilation is performed.

When the controller 7 determines that the indoor relative humidity RH is less than the predetermined value and that the outdoor absolute humidity Xo is higher than the indoor absolute humidity Xi (NO in steps S2 and S4), the air circulator 5 and the operation of the ventilation fan 41 are stopped (step S8). Thereby, circulation and ventilation of the air in the internal space 3 are not performed.

The processing shown in FIG. 2 is repeatedly performed, for example, every predetermined time (for example, 5 minutes).

As described above, according to the present embodiment, by circulating the air in the internal space 3 using the air circulator 5, the increase in humidity in the internal space 3 can be suppressed. Therefore, it is possible to prevent condensation and mold from forming in the internal space 3 of the warehouse 1 in early spring.

In addition, since the air circulator 5 is driven only when the indoor relative humidity RH reaches or exceeds a predetermined value, it is possible to suppress an increase in humidity in the internal space 3 without unnecessarily increasing power consumption.

Further, when the outdoor absolute humidity Xo is higher than the indoor absolute humidity Xi, the amount of moisture flowing into the internal space 3 from the outdoors can be suppressed by turning off the ventilation. Therefore, an increase in humidity in the internal space 3 can be effectively suppressed.

Furthermore, as described above, the air circulator 5 sends the air flow into the gap 90 between the storage items 9, so that the humidity in the gap 90 can be efficiently lowered. As a result, it is possible to suppress moisture absorption of the corrugated cardboard serving as the exterior part of the stored article 91 .

Corrugated cardboard is generally said to deteriorate when the relative humidity is 80% or higher. In the present embodiment, the predetermined value, which is the ON/OFF criterion for the air circulator 5, is set to a value (70%) lower than the lower limit at which deterioration can occur. Therefore, according to the present embodiment, deterioration of corrugated board can be prevented with high certainty. In addition, since deterioration of the corrugated cardboard serving as the exterior part of the stored items 91 can be prevented, even when a plurality of stored items 91 are piled up on the dirt floor 21 or the like and stored, the stored items 91 do not collapse. can also be prevented.

It is preferable that the predetermined value, which is the ON/OFF criterion for the air circulator 5, is 70% or less, but it is sufficient if it is 80% or less. Considering energy saving, it is also desirable that the predetermined value is 50% or more.

Further, in the present embodiment, since the air circulator 5 is provided on the ceiling 23 , air is blown toward the dirt floor 21 . Therefore, when the temperature of the internal space 3 is relatively low, such as in winter or early spring, the surface temperature of the dirt floor 21 can be increased by about 0.5°C by drying the surface. Therefore, it is also possible to prevent dew condensation from occurring on the earth floor 21 by driving the air circulator 5 .

(Example of air circulator arrangement)
In order for the air circulator 5 to effectively dehumidify the internal space 3 having a large volume, it is desirable to provide a plurality of air circulators 5 .

FIG. 3 is a plan view schematically showing an arrangement example of a plurality of air circulators 5. As shown in FIG.

The internal space 3 of the warehouse 1 is divided into a plurality of areas 3a to 3f in plan view. Each of the areas 3a to 3f is an area that can accommodate a plurality of items 91 to be stored. As an example, a plurality of storage object groups 9 as described above are arranged for each area.

In this case, the air circulator 5 is desirably provided for each of the partitioned areas 3a to 3f. As a result, an air flow can be sent into the gap 90 between the groups of stored items 9 in each region, so that the stored items 91 (cardboard) can be dried more effectively.

These regions 3a to 3f forming the internal space 3 are, for example, substantially rectangular regions partitioned by one or more pillars 25. As shown in FIG. In this embodiment, the internal space 3 is partitioned so that the pillars 25 are arranged at the corners of each rectangular area. The internal space 3 may be partitioned by a partition wall (not shown) that physically partitions the adjacent areas, or a partition member such as a rope or cone bar. may be partitioned by enclosed lines or the like.

Here, the humidity in the regions 3a to 3f is usually not uniform, and varies depending on the distance from the outer wall 22, the orientation, or the distance from the loading/unloading port 24 provided in the outer wall 22, or the like. Therefore, a humidity sensor 61 may be provided for each area in order to dehumidify the areas 3a to 3f more appropriately. In this case, since the relative humidity can be determined for each area, only the air circulators 5 arranged in areas with high relative humidity can be driven. As a result, variations in humidity between the regions 3a to 3f can be suppressed.

Alternatively, the humidity sensor 61 may be provided for each pillar 25 arranged at the boundary position of a plurality of areas, not for each area. In this case, the control device 7 can simultaneously perform ON/OFF control of the plurality of air circulators 5 arranged in the area adjacent to each pillar 25 . As a result, it is possible to reduce the number of humidity sensors 61 and suppress variations in humidity among the regions 3a to 3f.

(Modification)
The air circulator 5 may be arranged so as to be able to send an air flow into the gaps between the plurality of stored articles 91 adjacent in the horizontal direction or the height direction. In other words, the arrangement position and direction (blowing direction) of the air circulator 5 are not particularly limited as long as the airflow can be sent directly or indirectly into the gaps between the articles 91 to be stored. Therefore, the dehumidifying structure including the ventilating fan 41 and the air circulator 5 is also applied to warehouses employing other types of storage forms, such as storing articles 91 in an orderly manner on shelves installed in the internal space 3, for example. be able to.

Specifically, in the above embodiment, the air circulator 5 is installed on the ceiling 23, but if it is located above the internal space 3, it may be installed on a place other than the ceiling 23, for example, on the outer wall 22 or the pillar 25. may Note that the “upper position” represents a position above the center position in the height direction.

In addition, the air circulator 5 is installed facing downward to generate an air flow downward, but it does not have to be directed downward as long as the air flow can be sent into the gaps between the objects 91 to be stored. For example, the air circulator 5 may be installed horizontally to generate a horizontal airflow. Alternatively, the air circulator 5 may be of a so-called oscillating type, and the blowing direction may be periodically changed.

In this embodiment, the ON/OFF of the ventilation fan 41 is performed by comparing the indoor and outdoor absolute humidity, but the ventilation fan 41 may be constantly driven as in a general warehouse. In this case, the outdoor humidity sensor 62 is unnecessary.

Similarly, the air circulator 5 may also be driven all the time. In this case, the indoor humidity sensor 61 is also unnecessary.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

1 warehouse, 3 internal space, 3a to 3f area, 5 air circulator, 7 control device, 9 stored items group, 21 dirt floor, 22 outer wall, 23 ceiling, 24 loading/unloading entrance, 25 pillar, 30 passage, 41 ventilation fan, 42 exhaust Mouth, 61, 62 Humidity sensor, 90, 92 Gap, 91 Stored item.

Claims (5)

A warehouse for normal temperature storage,
an interior space surrounded by a first pair of outer wall portions facing each other, a second pair of outer wall portions provided between the first pair of outer wall portions, an earthen floor, and a ceiling;
a plurality of stored objects accommodated in the internal space;
a ventilation fan provided on one side of the first outer wall pair for supplying outdoor air toward the inner space;
an exhaust port provided on the other side of the first outer wall pair for discharging the air in the internal space to the outside;
an air circulator disposed above the internal space and sending an air flow into the gap between the stored items;
and a dirt floor,
A linear region connecting the ventilation fan and the exhaust port is formed in the internal space,
The warehouse, wherein the air circulator is provided outside the linear region and between the linear region and each outer wall portion of the second pair of outer wall portions to blow air toward the dirt floor. a first humidity sensor for detecting the humidity of the internal space;
2. The warehouse according to claim 1, further comprising a control device that drives said air circulator when the relative humidity of said internal space is equal to or higher than a predetermined value. further comprising a second humidity sensor for detecting the humidity of the outdoor space;
3. The warehouse according to claim 2, wherein said controller drives said ventilation fan when the absolute humidity of said outdoor space is equal to or less than the absolute humidity of said internal space. The internal space is divided into a plurality of regions in plan view,
The warehouse according to any one of claims 1 to 3, wherein said air circulator is provided for each of said areas. The internal space is divided into a plurality of regions in plan view,
4. The warehouse according to claim 2 or 3, wherein said air circulator and said first humidity sensor are provided for each said zone.

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