JP6375101B2 - How to ventilate the warehouse - Google Patents

Description

  The present invention relates to a ventilation method for a warehouse in which a storage object is placed on a rack and a plurality of such racks are installed.

  For example, a so-called room temperature distribution warehouse is generally only ventilated, and a pressure fan is used for air supply and exhaust, but in the warehouse, the storage object is placed on a rack, Since a plurality of the racks are installed in the horizontal and vertical directions, it is in an overcrowded state. Therefore, in order to spread the introduced outside air uniformly in the warehouse, for example, a transport fan is appropriately provided in the passage between the racks separately from the pressure fan (Patent Document 1).

JP 2005-30692 A

  However, during the summer, the temperature in the warehouse becomes higher during the day and is higher than the outside air temperature, so it is necessary to take measures against the heat of workers entering the warehouse. There was also a problem of being expensive.

  The present invention has been made in view of such points, and in ventilation of a warehouse, etc., the inside of the warehouse is maintained in an appropriate temperature environment without moving the pressure fan even during the daytime, and the running cost is higher than before. It is also aimed to suppress.

In order to achieve the above object, the present invention provides a ventilation method for a warehouse in which a storage object is placed on a rack and a plurality of such racks are aligned and accommodated, and the storage object is placed at a position orthogonal to the longitudinal direction of the rack. An exhaust pressure fan is provided on one side wall of the warehouse, an air supply pressure fan is provided on the other side wall facing the one side wall, and an external heat insulation is provided on the outer wall of the warehouse. The outside air supplied from the air supply pressure fan is replaced with a replacement ventilation blowing device disposed at a position facing the exhaust pressure fan in a plan view, or a replacement ventilation provided on the floor surface. The blowout device for air blows out into the warehouse at a wind speed condition satisfying the replacement ventilation, and the outside air supplied from the air supply pressure fan is blown out toward the other side wall end face of the rack. , Yes圧扇and air supply for the exhaust Yes 圧扇 it is characterized in that actuating only at night in summer.

According to the present invention, since the blowout device for replacement ventilation blows out into the warehouse at a wind speed condition satisfying the replacement ventilation, the outside air is uniformly supplied into the warehouse without using a transfer fan as in the prior art. can do. Since the exhaust pressure fan and the air supply pressure fan are operated only at night in the summer, the storage object is cooled by a so-called night purge, and during the day, radiation from this stored storage object is stored. The inside of a warehouse can be made into a favorable temperature environment by cold heat.
In addition, the supplied outside air hits the end surface, and is divided in the left-right direction in plan view, and enters the passages between the racks and between the rack and the wall surface, and easily spreads throughout. Here, the outside air supplied from the air supply pressure fan is the outside air supplied directly or indirectly by the operation of the air supply pressure fan.

  By comparing the temperature in the warehouse and the outside air temperature, the exhaust pressure fan and the air supply pressure fan may be operated when the outside air temperature is low.

  When the outside air temperature is lower than a set value, the number of operating exhaust pressure fans and supply pressure fans may be reduced.

  The warehouse communicates with an air-conditioned space through an openable / closable communication path, that is, communicates with a warehouse that is not air-conditioned by an air conditioner or the like, and another space that is air-conditioned by an air conditioner or the like via a communication path that can be opened and closed. When a person enters the warehouse, the exhaust pressure fan may be operated while the supply pressure fan is stopped to open the communication path.

  According to the present invention, outside air can be uniformly supplied into the warehouse by replacement ventilation without using a transfer fan as in the prior art, and the storage object is cooled by so-called night purge, and the daytime Because the radiant cooling heat from the stored storage object can make the warehouse a good temperature environment, the temperature environment in the warehouse can be made suitable with less energy than before, and the running cost can be reduced. be able to.

It is a schematic explanatory drawing of the plane of the warehouse where the ventilation method of the warehouse concerning an embodiment is implemented. It is a longitudinal cross-sectional explanatory drawing which shows the structure of the surroundings of the air supply pressure fan. It is a front view of an air supply unit. It is a longitudinal cross-sectional explanatory drawing of the blower outlet of an air supply unit. It is explanatory drawing which shows the structure of a guide fin. It is explanatory drawing which shows the structure of the guide fin different from the guide fin of FIG. It is explanatory drawing which shows the turning component of each blower outlet.

  The embodiment of the present invention will be described. FIG. 1 shows an outline of a plane of a warehouse W in which the warehouse ventilation method according to the embodiment is implemented. In this warehouse W, a plurality of racks L1 to L10 on which the storage object K is placed are accommodated. In the present embodiment, each rack L1 to L10 is arranged in two rows (L1 to L5, L6 to L10) as five in a row.

  On one side wall WA located in a direction perpendicular to the longitudinal direction of the rack L in the warehouse W, a plurality of exhaust pressure fans, for example, three exhaust pressure fans F1, F2, and F3 are installed. The exhaust pressure fans F1 to F3 are installed as high as possible. For example, when the ceiling part in the warehouse W is a ceiling board, it is installed at a high position where construction is possible, and when the ceiling part in the warehouse W is so-called straight ceiling concrete, there is an exhaust for the bottom of the ceiling slab. It installs so that the upper end of the pressure fans F1-F3 may be located. In any case, if the height from the floor surface to the ceiling surface is h, the exhaust pressure fans F1 to F3 are at a height position of (3/4) h or more from the floor surface. It is preferable to install so that the upper end of ~ F3 is located.

  On the other hand, on the other side wall located in the direction orthogonal to the longitudinal direction of the rack L, that is, the side wall WB facing the side wall WA, a plurality of supply pressure fans, for example, three supply pressure fans G1, G2 and G3 are installed. The air supply pressure fans G1, G2, and G3 are respectively disposed at positions facing the exhaust pressure fans F1, F2, and F3 in plan view. In the present embodiment, as shown in FIG. 1, the air pressure fan G <b> 1 is similarly located at a position facing the side wall WB side end surface of the rack L <b> 6 in a plan view. Are installed at a position facing the end face on the side wall WB of the rack L8, and a pressure fan G3 for supplying air is installed at a position facing the end face on the side wall WB of the rack L10. As will be described later, the outside air OA from the air supply pressure fans G1 to G3 is stored in the warehouse from the air supply unit 20 connected to the duct 10 that vertically falls from the air supply pressure fans G1 to G3. Therefore, the air supply unit 20 duct-connected to each of the air supply pressure fans G1 to G3 faces the racks L6, L8, and L10.

  The configuration around the air supply pressure fans G1, G2, and G3 is the same for all the air supply pressure fans G1, G2, and G3. In other words, the air supply pressure fan G2 is provided in the opening 1 formed at a predetermined height on the side wall WB. A shutter 2 is provided on the outdoor side of the air supply pressure fan G2 in the opening 1. A weather cover 3 is provided on the outdoor side of the opening 1. An outer heat insulating material 4 is applied to the surface of the side wall WB. The outer heat insulating material 4 is applied not only to the side wall WB but also to the outer surface of the warehouse W as well as the front side wall WA.

  An elbow duct 10 is connected to the inside of the warehouse of the opening 1, and this elbow duct 10 is connected to the upper surface of an air supply unit 20 that is installed on the floor surface 11 in the warehouse W and is a replacement ventilation blowing device. ing.

  The air supply unit 20 constitutes a chamber and does not include a fan or a heat exchanger. The air supply unit 20 may have a so-called hollow structure that does not have any devices in its interior. For example, as shown in FIG. 9A of Japanese Patent No. 2862149, an air resistor is incorporated. It may be a thing. In the present embodiment, a plurality of air outlets 21 are formed on the front surface of the air supply unit 20 as shown in FIG. As shown in FIG. 4, a plurality of guide fins 22 for providing a swirl component when the outside air OA introduced by the air supply pressure fan G <b> 2 is blown into the warehouse W are provided at each outlet 21. Each is provided. That is, a support member 23 is disposed on the central axis of each air outlet 21, and a plurality of guide fins 22 are mounted at equal intervals on the support member 23, so that the periphery of the air outlet 21 is centered. A plurality of guide fins 22 are arranged radially. The periphery of the guide fin 22 is surrounded by a cylinder 24.

  The plurality of guide fins 22 are provided obliquely so as to have the same inclination angle with respect to a plane orthogonal to the central axis 21 ′ of the air outlet 21 (for example, the front panel 20 a of the air supply unit 20). Yes. 5 and 6 are explanatory diagrams of the inclination angle of the guide fins 22 provided at the air outlet 21. In the example of FIG. 5 and the example of FIG. 6, the inclination directions of the guide fins 22 are opposite to each other. It has become. That is, in the example of FIG. 5 (type A), when the front panel 20a of the air supply unit 20 is viewed from the indoor side with respect to the outside air OA blown into the warehouse from the blower outlet 21, turning in the counterclockwise direction Each guide fin 22 is provided with an inclination so as to give a component.

  On the other hand, in the example of FIG. 6 (type B), when the front panel 20a of the air supply unit 20 is viewed from the indoor side with respect to the outside air OA blown out from the outlet 21 into the warehouse, the clockwise direction Each of the guide fins 22 is provided so as to be inclined so as to give the swirl component.

  With this configuration, the outside air OA that has flowed from the inside of the air supply unit 20 toward the air outlet 21 is forced to flow along the surface of each fin 22 and blown out when passing through the air outlet 21. The swirl component in the counterclockwise direction (type A) or the clockwise direction (type B) is given to the outside air OA.

  As described above, the front panel 20a of the air supply unit 20 has a plurality of air outlets 21 arranged vertically and horizontally, but the swirl components of the outside air OA blown out from the adjacent air outlets 21 are opposite to each other. The inclination of the fins 22 of the above-described types A and B is set so as to have a relation in the rotation direction. That is, as shown in FIG. 7, in the relationship between the blower outlets 20 arranged vertically, the swirl components of the outside air OA blown out from the adjacent blower outlets 20 are set so as to have a relationship of opposite rotation directions. In addition, in the relationship between the outlets 20 arranged on the left and right, the swirl components of the outside air OA blown out from the adjacent outlets 20 are set to have the same rotational direction. In FIG. 7, the types of each outlet 20 are made easy to understand by adding symbols A and B.

  According to the air supply unit 20 having such a configuration, when the outside air OA is blown out into the warehouse while turning from each outlet 20, ambient air is attracted to the outside air OA blown out from each outlet 20. The attracting action that moves together is done. Since the swirl component is given to the outside air OA blown out from the outlet 20, the amount of ambient air attracted to the outside air OA increases. Accordingly, the speed of the outside air OA is quickly reduced after being blown out from each outlet 20 in accordance with the law of conservation of momentum.

  The supply pressure fans G 1, G 2, G 3 and the exhaust pressure fans F 1, F 2, F 3 for introducing the outside air OA to the supply air unit 20 are controlled by the control device 30. That is, as a general rule, the air supply pressure fans G1, G2, and G3 and the exhaust pressure fans F1, F2, and F3 are operated only at night in summer.

  The warehouse W is provided with a first temperature sensor 31 for measuring the temperature in the warehouse, and outside the warehouse W is provided with a second temperature sensor 32 for measuring the temperature of the outside air. Control based on the measurement results of the first temperature sensor 31 and the second temperature sensor 32 is also possible.

  That is, comparing the warehouse temperature and the outside air temperature, the exhaust pressure fans F1 to F3 and the supply pressure fans G1 to G3 can be operated only when the outside air temperature is low. Furthermore, when the outside air temperature is lower than the set value, it is possible to reduce the number of operating exhaust fans F1 to F3 and supply pressure fans G1 to G3.

  The warehouse W where the warehouse ventilation method according to the embodiment is implemented has the above-described configuration, and in the summertime night, the exhaust pressure fans F1 to F3 and the supply pressure fans G1 to G3 are provided. By operating it, it is possible to introduce a low temperature outside air OA into the warehouse and perform replacement ventilation in the warehouse. That is, the air in the warehouse that is hotter than the outside air OA rises and is exhausted out of the warehouse through the exhaust pressure fans F1 to F3, and the inside of the warehouse is replaced with the outside air OA. In such replacement ventilation, the wind speed condition of the outside air OA blown out from the air supply unit 20 is important.

  That is, when the outside air OA is blown into the warehouse W, the blown wind speed is set to be about 0.2 m / s or less so as not to disturb the temperature stratification in the warehouse W. As a result, replacement ventilation is performed on the space in the warehouse W, and a so-called temperature stratification is constructed in the warehouse W where the temperature is uniform in a plane and has a temperature gradient in the height direction. . Further, in this embodiment, since the swirl flow induction type air supply unit 20 for replacement ventilation is used, as described above, since the air is decelerated immediately after being blown out, the wind speed at the surface of the air outlet 21 is 1.2 m. If it is about / s or less, temperature stratification is maintained. Further, the air outlet is not limited to the method of blowing from the wall surface in the lateral direction, but may be a method of blowing from the floor surface. In this case, the wind speed at the opening surface of the air outlet may be 0.2 m / s or less. In such a case, the outside air OA may be introduced into the underfloor chamber from the pressure fan G provided on the side wall via the duct. Furthermore, when the swirl type floor blowing method described in JP-A-9-250803 or the like is used as the floor blowing method, the wind speed at the opening surface of the blowing outlet should be about 0.5 m / s or less. good. In the floor blowing method, it is preferable to adjust the air velocity at each outlet by providing a damper at each outlet and adjusting the opening degree or by providing a filter.

  The air supply from the air supply unit 20 is at the same distance as the height of the air supply surface (for example, when the height of the front panel 20a is 2.1 m, a point 2.1 m from the front panel 20a indoors). On the other hand, when a conventional air supply unit is used or when an air outlet is set near the floor surface, Japanese Patent Laid-Open No. 6-185780, Japanese Patent No. 2862149. The blowout wind speed disclosed in the above issue is 0.6 m / s or less, more preferably 0.3 m / s or less. In order to realize such a wind speed, it is necessary to use a method of reducing the airflow speed by using a resistor such as a bag filter and pressure equalizing means such as Japanese Patent No. 2862149, instead of swirling flow type replacement ventilation. it can.

  In this way, during the summer night, replacement ventilation with the low-temperature outside air OA is performed in the warehouse W, and the storage object K placed on the rack L is cooled by the low-temperature outside air OA. During the daytime, the supply pressure fans G1, G2, and G3 and the exhaust pressure fans F1, F2, and F3 are stopped, and the shutter 2 is closed. This prevents the high temperature outside air from flowing into the warehouse W. On the other hand, since the storage object K placed on the rack L is cooled at night, the inside of the warehouse W becomes a favorable temperature environment due to the radiation of the cold storage heat at that time. As described above, since the outer insulation is applied to the warehouse W, if it is an object to be stored at room temperature, the temperature environment necessary for storage can be sufficiently obtained by the radiation of cold heat from the storage object K. Is. That is, since the outside air at night is 25 ° C. to less than 30 ° C. even in the summer, the temperature in the warehouse is kept at the same level.

  Moreover, since replacement ventilation with outside air OA at night in the summer is adopted, the outside air OA can be uniformly distributed in the warehouse W by temperature stratification without providing a transfer fan as in the past. It saves energy and can reduce running costs.

  In the present embodiment, the air supply unit 20 connected to the air supply pressure fan G1 via the duct 10 in plan view is similarly supplied to the position facing the side wall WB side end surface of the rack L6. The air supply unit 20 connected to the air pressure fan G2 is located at the position facing the end surface on the side wall WB of the rack L8, and the air supply unit 20 connected to the air pressure fan G3 is connected to the side wall WB of the rack L10. Since the air OA blown out from one air supply unit 20 strikes the end surface of each rack L and is distributed to the left and right after being installed at positions facing the side end surfaces, a path between the racks L It is possible to supply the outside air OA. Therefore, replacement ventilation can be performed efficiently.

  Further, in the present embodiment, it is possible to operate the exhaust pressure fans F1 to F3 and the supply pressure fans G1 to G3 only when the temperature inside the warehouse is compared with the outside air temperature and the outside air temperature is low. Therefore, a more efficient ventilation method can be implemented.

  Furthermore, when the outside air temperature is lower than the set value, it is possible to reduce the number of exhausted pressure fans F1 to F3 and the supply pressure fans G1 to G3. The running cost can be further reduced by operating the fan.

  By the way, since the warehouse W is not a living space, there is no rule in the ventilation amount even in the midsummer. However, in some cases, personnel may enter the warehouse for inspection or inspection in the warehouse W. In this case, for example, the following measures can be taken as countermeasures against the heat of the warehousing person.

  For example, in a living space where personnel are usually present, for example, in an office building, cooling is performed in summer. Therefore, the office building and the warehouse are communicated with each other by a communication path that can be opened and closed. The communication passage may be a corridor, or a duct may be separately constructed. Only when a person enters the warehouse, the evacuated fan F is operated to open the communication passage, thereby forcibly introducing the conditioned air in the conditioned space such as an office building into the warehouse. be able to. The communication path may be opened and closed by a damper, for example, or a door gallery that is normally closed may be opened. With this method, personnel can safely enter the warehouse even on midsummer days.

  The present invention is suitable for ventilation in a warehouse stored at room temperature.

DESCRIPTION OF SYMBOLS 1 Opening 2 Shutter 3 Weather cover 4 Outer heat insulating material 10 Elbow duct 11 Floor surface 20 Air supply unit 20a Whole surface panel 21 Outlet 22 Guide fin 23 Support member 24 Cylinder 30 Control apparatus 31 1st temperature sensor 32 2nd temperature sensor F1 , F2, F3 Exhaust pressure fan G1, G2, G3 Supply air pressure fan K Storage object L1-L10 Rack W Warehouse WA, WB Side wall

Claims (4)

A method for ventilating a warehouse in which storage objects are placed on a rack and a plurality of the racks are aligned and accommodated,
An exhaust pressure fan is provided on one side wall of the warehouse at a position orthogonal to the longitudinal direction of the rack, and an air supply pressure fan is provided on the other side wall facing the one side wall. And
Install outer insulation on the outer wall of the warehouse,
The external air supplied from the supply pressure fan is replaced by a replacement ventilation device disposed at a position facing the exhaust pressure fan in a plan view or by a replacement ventilation device provided on the floor. In the warehouse, blow out at a wind speed that satisfies the replacement ventilation,
Further, the outside air supplied from the air supply pressure fan is blown out toward the other side wall end face of the rack,
The ventilation method for a warehouse, wherein the exhaust pressure fan and the air supply pressure fan are operated only at night in summer. A method for ventilating a warehouse in which storage objects are placed on a rack and a plurality of the racks are aligned and accommodated,
An exhaust pressure fan is provided on one side wall of the warehouse at a position orthogonal to the longitudinal direction of the rack, and an air supply pressure fan is provided on the other side wall facing the one side wall. And
Install outer insulation on the outer wall of the warehouse,
The external air supplied from the supply pressure fan is replaced by a replacement ventilation device disposed at a position facing the exhaust pressure fan in a plan view or by a replacement ventilation device provided on the floor. In the warehouse, blow out at a wind speed that satisfies the replacement ventilation,
The exhaust pressure fan and the air supply pressure fan are operated only at night in summer,
The warehouse communicates with the air-conditioned space through an openable / closable communication path.
When a person enters the warehouse, the exhaust pressure fan is operated in a state where the supply pressure fan is stopped, and the communication passage is opened. . The temperature in the warehouse is compared with the outside air temperature, and the exhaust pressure fan and the supply air pressure fan are operated when the outside air temperature is low. Ventilation method of the listed warehouse. When the outside air temperature is lower than a set value, the operating number of the exhaust pressure fan and the supply pressure fan is reduced, The warehouse according to any one of claims 1 to 3, Ventilation method.

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