JP2006001401A - Air shutter for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air shutter for a vehicle, provided on an opening part of a doorway in the vehicle, such as a truck, a train, a bus, or the like for humans or transported articles to get in and out, with air conditioning indoors to form temperature difference between the indoor side and open air, capable of efficiently shielding flow of air in simple structure without prohibiting getting in and out of humans and articles, or causing deterioration of air conditioning efficiency, or refrigerating/freezing efficiency. <P>SOLUTION: This air shutter is provided to shield flow of air on the opening part of the doorway in the vehicle, with air conditioning indoors to form temperature difference between the indoor side and open air. Air ducts 1a and 1b are raised on both sides of the opening part. Air blow ports are provided on one air duct, and air suction ports are provided on the other air duct at a specific level of height to face each other, and disposition of the air blow ports and the air suction ports are reversed in part of the height, so that horizontal air circulation currents f1 and f2 are formed at the opening part to shield the indoor side of the vehicle and open air. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention has a simple structure in which a person such as a truck, a train, a bus or the like or a transported object enters and exits, and the inside of the vehicle is air-conditioned and is provided at the opening of the entrance / exit of the vehicle having a temperature difference between the inside and outside air, The present invention relates to an air shutter for a vehicle that does not impede the entry and exit of people and objects, efficiently blocks air flow, and does not cause a decrease in cooling / heating efficiency, refrigeration / refrigeration efficiency, or the like.

In conventional refrigerated trucks, when loading or unloading cargo, room temperature air outside the truck is blown out from the bottom of the opening to the opening of the loading / unloading entrance to form a room temperature wind wall. As a result, the outflow of cold air to the outside of the truck and the inflow of warm air to the inside of the truck were blocked.
Or depending on the case, the cooling air in a track was blown down from the upper part of the opening part, and the cold wind wall might be formed in the opening part.

  For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-205727) includes a blower duct that blows outside air upward from below a door of a rear freezer compartment of a freezer by a blower, and the door is formed by an airflow blown from the blowout duct. A refrigeration vehicle including an air curtain device that forms an air curtain in an opening is disclosed. Further, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-44484), as an air curtain device for a refrigeration vehicle, a plurality of air outlets are arranged in a row below the rear opening / closing door of the cold storage, and the opening / closing door is opened. An air curtain device that blows air upward from each air outlet is disclosed.

  In addition, conventional heated train doors use an air curtain device that blows down warm air using a fan and heater installed on the ceiling, or air outlets on both sides of the door to suck in the air inside the vehicle. There is a method of blowing in the horizontal direction and hitting at the center of the opening.

JP 2000-205727 A JP 2004-44444 A

In the air curtain device disclosed in Patent Document 1 or 2, it is difficult to maintain the flow rate of the blown air above the opening, and it is difficult to install an air outlet at the lower part of the open / close door. Since water tends to accumulate, there is a problem in terms of hygiene, and there is a problem that the air outlet is likely to be clogged with dust and is likely to break down.
In addition, the method of blowing down from the upper part of the opening is a simple method and has been widely used in the past. However, the flow rate of the blown air is the lowest in the case of a refrigerated / refrigerated truck or when heating a train. In the vicinity of the floor surface, there is a problem that the blocking efficiency is lowered and it is difficult to obtain a stable curtain effect.

  In addition, the method of providing a blowout port next to the opening / closing door and hitting it at the center of the opening has a problem that the blown air collides with the central portion, which causes turbulence and promotes cool air outflow, warm air inflow, and the like. In order to avoid such a state, it is conceivable to lower the blowing wind speed, but it is difficult to form an air wall, and it is difficult to block cold air outflow, warm air inflow, and the like.

  In view of the problems of the prior art, the present invention is such that people such as trucks, trains, and buses or objects to be transported enter and exit, and the interior of the vehicle is air-conditioned so that there is a temperature difference between the interior and the outside air at the opening of the entrance of the vehicle. An object is to provide an air shutter for a vehicle that has a simple structure, does not hinder the entry and exit of people and objects, efficiently blocks air flow, and does not cause a decrease in air conditioning efficiency, refrigeration efficiency, refrigeration efficiency, etc. And

  The present invention achieves such an object, and the means is an air shutter that is provided in an opening of an entrance of a vehicle having a temperature difference between the inside and outside of the vehicle and that blocks air circulation. Air ducts are erected on both sides across the opening, and at the same height in both air ducts, an air outlet is provided in one air duct and an air inlet is provided in the other air duct so as to face each other. The air outlet and the air inlet are arranged reversely at a certain height, and a horizontal air circulation flow is formed in the opening to block the inside and outside air of the vehicle. .

In the present invention, according to the above configuration, the air intake port takes in air from the inside and outside of the vehicle in the vicinity of the opening at the beginning, and takes in air from the air outlet facing the same height as the air intake port. Forming an independent air wall having an intermediate temperature between the vehicle interior air temperature and the vehicle exterior air temperature. As a result, the entry and exit of the inside and outside air can be blocked with high efficiency.
The inventors of the present invention have previously proposed a method of shutting off air by using an air shutter against the outflow of cool air to the outside of the building or the warm air to the building that occurs at the entrance / exit opening having a temperature difference such as in a building. No. 2004-77113), the air blocking effect according to the present invention can provide a blocking effect equivalent to the air blocking effect of the prior invention.

In such means, preferably, the air outlet and the air inlet of the air duct are arranged so as to form a plurality of air circulation flows.
By configuring a plurality of air circulation flows in this way, the suction flow paths of the respective air circulation flows are shortened, and a smooth flow path shape with less interference of the suction flows is obtained. As a result, the suction resistance to the driving means that forms the air circulation flow, for example, the air blowing fan, decreases, and the suction side static pressure rises and is not reduced due to the narrow air passage on the suction side of the air blowing fan in the air duct. Uniformity can be suppressed, and variations in the blowout flow velocity can be reduced, preventing a decrease in circulating wind speed and air volume accompanying an increase in suction side static pressure.

  Preferably, an air blowing fan is provided inside the air duct. This enables a compact structure in which the air shutter of the present invention does not occupy a large space in the vicinity of the opening of the vehicle, eliminates an extra flow path, reduces flow path resistance, and provides an efficient circulation flow. Can be formed.

Further preferably, the air blowing fan is provided in the air duct so that an air blowing direction is vertical, an air suction port is provided on the upstream side in the air blowing direction, and an air is provided on the downstream side in the air blowing direction. Provide an outlet.
Since the static pressure is not increased upstream of the air blowing fan, a running space of a certain distance or more (for example, 150 to 350 mm or more) is required. Below this, the performance of the air blowing fan cannot be exhibited. Therefore, when the air blowing fan is installed in the air duct so as to blow out air in the horizontal direction, it is necessary to increase the horizontal space width of the air duct. The blowing direction can be changed to the vertical direction, and even if the horizontal length of the air duct is shortened (for example, it can be set to 150 mm), the static pressure does not increase. Therefore, since the length of the air duct in the horizontal direction can be shortened and made compact, the opening area of the vehicle can be maximized.

More preferably, the air blowing fan is disposed below the air duct, and the air blowing fan and the air duct are communicated with each other through a communication pipe.
Thereby, the internal space of the air duct can be further narrowed, and the length of the air duct in the width direction can be further shortened (for example, 100 mm).

Preferably, the air duct is provided inside the cargo bed or inside the opening / closing door at an opening provided in a rear part of the loading platform of the transportation truck, and the air duct is opened to the opening in the state where the opening / closing door is opened. Try to face each other.
As a result, an air circulation flow can be easily formed in the opening when loading and unloading the load.

More preferably, by allowing the air duct to move to a position where the opening is not obstructed with the open / close door open, the air duct is not obstructed while opening the opening as wide as possible. It is possible to load and unload luggage.
Preferably, by providing the air duct inside the opening / closing door of the train, a horizontal air circulation flow can be formed in the sliding door of the train, and even when the sliding door is opened, the inside / outside air can enter and exit with high efficiency. The temperature inside the air-conditioned train can be maintained at a predetermined temperature.

  As described above, according to the present invention, air ducts are erected on both sides sandwiching the opening, and at the same height in both the air ducts, an air outlet is provided in one air duct and the other air duct In the horizontal direction, the arrangement of the air outlet and the air inlet is reversed at a certain height so that the inside of the vehicle and the outside air are blocked at the opening. By forming the air circulation flow, the air intake port first takes in the air inside and outside the vehicle near the opening, and takes in air from the facing air outlet, and the vehicle interior air temperature and the vehicle outside air temperature are Independent air walls having an intermediate temperature between them can be formed, and thereby the entrance and exit of the inside and outside air can be blocked with high efficiency.

  Further, according to the present invention, by arranging the air outlet and the air inlet of the air duct so as to form a plurality of air circulation flows, the driving means for forming the air circulation flow, for example, an air blowing fan is provided. The suction resistance is reduced, and the increase and non-uniformity of the suction side static pressure due to the narrow air passage on the suction side of the air blowing fan in the air duct can be suppressed. It is possible to prevent a decrease in circulating wind speed and air volume accompanying an increase in pressure.

  In addition, since the structure of the air duct can be simplified and miniaturized, the opening of the vehicle entrance and exit is not blocked, and there is no hindrance to unloading the cargo. Loading and unloading can be performed without hindrance. It can also be installed on air-conditioned train slide doors to effectively block outside air when the slide doors are opened.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
1A is an elevational sectional view according to the first embodiment of the present invention, FIG. 1B is a plan sectional view of the first embodiment, and FIG. 2 is a left air duct of FIG. FIG. 3A is an elevational sectional view according to a second embodiment of the present invention, FIG. 3B is a plan sectional view of the second embodiment, and FIG. 4 is a sectional view of FIG. FIG. 5A is an elevational sectional view according to the third embodiment of the present invention, FIG. 5B is a sectional plan view of the third embodiment, and FIG. It is an enlarged view of the left air duct of (a).

  7 to 10 are perspective views according to a fourth embodiment in which the present invention is applied to a container rear door of a refrigerated refrigeration truck, and FIG. 11 is a fifth embodiment in which the present invention is applied to a container rear door of a refrigerated refrigeration truck. FIG. 12 is an elevation view of a fixing plate according to the fifth embodiment, and FIGS. 13 to 17 are perspective views according to a sixth embodiment in which the present invention is applied to a container rear door of a refrigeration truck. FIG. 18 is a perspective view according to a seventh embodiment in which the present invention is applied to a container rear door of a refrigerated refrigeration truck, and FIG. 19 is a longitudinal section showing a case where the refrigerated truck is installed in a truck booth in the seventh embodiment. FIG. 20 is an elevation view according to an eighth embodiment in which the present invention is applied to a sliding door of a train, FIG. 21 is a plan view according to the eighth embodiment, and FIG. Sectional drawing which follows the AA line in the inside, (b) is FIG. It is a sectional view taken along line B-B in.

1 and 2 showing the first embodiment of the present invention, 1a and 1b are air ducts arranged on both sides of a rear cargo bed opening of a refrigerated truck (not shown) and partitioned into upper and lower spaces by a partition 4, A plurality of air blowing fans 2 are installed so that two circulating flows f1 and f2 are formed in these upper and lower spaces. The air blowing fans 2 are arranged in a staggered manner so that two air blowing fans 2 are not arranged at the same height between the air ducts 1a and 1b, and the suction side always faces the blowing side where the air blowing fan 2 is arranged. It is configured as follows.
Further, as shown in FIG. 2, the air flow direction plate 3 on the air blowing side of the air blowing fan 2 increases the blowing flow velocity to the air suction port provided so as to confront the air flow with another air duct. The throttle portion 3a is provided so as to maintain a constant flow rate. For example, the opening width of the throttle portion 3a is 100 mm while the width of the air blowing fan unit is 200 mm.

  In the first embodiment, by operating the air blowing fan 2, two circulating air flows f1 and f2 are formed in the opening of the refrigerated truck. These circulating air flows first take in the air flow with temperature difference near the opening inside and outside the truck bed, and take in the air on the suction side to create an independent circulating air flow at a temperature intermediate between the inside and outside of the refrigerated truck bed. Form. For example, when the temperature in the loading platform is −20 ° C. and the outside air temperature is 30 ° C., the circulation flow is about 10 ° C.

According to the first embodiment, it is possible to block outside air with high efficiency by forming an independent circulation flow in the horizontal direction. Since the air blowing fan 2 is built in the air ducts 1a and 1b, the apparatus can be made compact.
Further, since the wind direction plate 3 has the throttle portion 3a, there is an advantage that the circulation flow can be increased without enhancing the power of the air blowing fan 2, and the blocking effect by the circulation flow is not lowered.

  3 and 4 showing the second embodiment of the present invention, in the air ducts 11a and 11b, the internal space is divided into multiple parts by the partition 14, and one air blowing fan 12 is installed in each space. The air outlets are arranged downward in the air duct 11a, upwards in the air duct 11b, and the wind direction plate 13 is dispersedly arranged on the downstream side of the air outlet fan 12, whereby a large number of air outlets are arranged in the vertical direction. Circulating flows f1 to f5 are formed. The other configuration such as the throttle portion 13a of the wind direction plate 13 is the same as that of the first embodiment.

  In the second embodiment, since a large number of circulation flows are formed side by side in the vertical direction, the suction flow path of each air circulation flow is further shortened, and a smooth flow path shape with less interference of the suction flow is obtained. As a result, the suction resistance to the air blowing fan 12 is reduced, and the increase and non-uniformization of the suction side static pressure due to the narrow air passage on the suction side of the air blowing fan 12 in the air duct can be suppressed. The variation in the flow velocity is reduced, and it is possible to prevent a decrease in circulating wind speed and air volume accompanying an increase in suction side static pressure.

Further, since the air blowing fan 12 is arranged in the air ducts 11a and 11b so that the blowing direction is vertical, a running section is secured in the air duct 11a and 11b in the horizontal direction so as not to increase the static pressure. Therefore, the length of the air duct in the width direction can be greatly shortened.
This is a great advantage for vehicles such as refrigerated trucks, where the width of the rear cargo bed is limited and the opening is not necessarily wide. Thus, the air duct of the present invention can be installed without much blocking the opening.

5 and 6 showing the third embodiment of the present invention, the air ducts 21a and 21b are provided with a partition 24 for partitioning the blowing space 25 and the suction space 26 in the internal space, and the lower part of the air duct. The air blowing fan 22 is installed in the air blowing fan 25, the air blowing path 25 a of the air blowing fan 22 communicates with the blowing space 25, and the air suction fan 26 of the air blowing fan 22 communicates with the air suction space 26.
The rest of the configuration of the airflow direction plate 23 is the same as that of the first embodiment.

  In the third embodiment, the horizontal width of the air ducts 21a and 21b can be further reduced (for example, 100 mm) by moving the air blowing fan 22 from the inside of the air duct to the lower part of the air duct. When loading or unloading luggage, the opening of the loading platform can be further opened.

7 to 10 show a fourth embodiment of the present invention. The fourth embodiment is an example in which the present invention is applied to a container rear door of a refrigeration truck. That is, the air ducts 33a and 33b are attached to the inside of the rear doors 32a and 32b of the container 31 of the refrigeration truck. The illustration of the air blowing fan is omitted.
FIG. 7 shows a state in which the rear doors 32a and 32b are closed (cooling during running or standby) and the air shutter is stopped. FIG. 8 shows a state in which the rear door is opened 90 degrees, and the air shutter is still stopped. FIG. 9 shows a state in which the rear door is opened 180 degrees, and in this state, the air shutter is still stopped, but FIG. 10 shows the air hinged inside the door with respect to the rear door opened 180 degrees. The ducts 33a and 33b are rotated so that the air outlets and the air inlets face each other and fixed to the inner surface of the rear door, and then fixed to the inner side of the rear doors 32a and 32b, and the air shutter starts operation. To do.
According to the present embodiment, since the air duct does not block the rear opening of the container 31, there is no hindrance for loading and unloading the luggage. It is also easy to install an air duct attached to the inside of the rear door to the operating position.

  FIG. 11 shows a fifth embodiment of the present invention. The air ducts 43a and 43b share hinge shafts 45a and 45b to which the rear doors 42a and 42b are attached, and the rear door 42a is rotatable about the hinge shaft. 42b, when the air ducts 43a and 43b are installed at a position where the rear doors 42a and 42b are opened, the fixing plates 44a and 44b are installed at the lower part. Secure the air duct to the.

The fixing plates 44a and 44b are housed in a folded state inside the rear doors 42a and 42b and are hinged so as to be pivotable. When the air shutter is in operation, the rear doors are opened. In the state, it is turned outward, the folding part is expanded, it is fixed horizontally at the same height as the floor of the loading platform, and an air duct is placed on it and fixed.
FIG. 12 is an enlarged view of the fixed plate 44a. The horizontal hinge shaft 46a has the same height as the floor of the container 41, and is rotatably housed inside the rear door 42a. One of the folding portions 49a coupled to the hinge shaft 48a can be opened outward with the hinge shaft 48a as a center. 47a is a groove provided in the fixed plate, and a wheel or roller 50a (not shown) provided in the lower portion of the air duct rotates in the groove, so that the air duct 43a can move on the fixed plate 44a. 11 is fixed at the operating position illustrated in FIG.
According to this embodiment, since the air duct is rotatably supported by the same hinge shaft inside the rear door, it is easy to pull out to the operating position, and the air duct is firmly fixed on the fixed plate during operation. It can be fixed and operated.

  Next, FIGS. 13 to 17 show a sixth embodiment of the present invention when the air duct is attached to the inner surface of the rear portion of the container of the refrigerated refrigeration truck. FIG. 13 shows a state in which the rear shutters 52a and 52b are closed (cooling during running or standby) and the air shutter is stopped. FIG. 14 shows a state in which the rear door is opened. When the load is small, the load is unloaded in this state. In this case, the air shutter is activated simultaneously with opening the rear door.

When the load is large, as shown in FIG. 15, the air ducts 53a and 53b are moved onto the fixed plates 54a and 54b while operating the air shutter. First, as shown in FIG. 16, the half-folded fixing plate is opened outward, then the air ducts 53a and 53b are placed on the fixing plates 54a and 54b, and moved on the fixing plates 54a and 54b, so that the positions shown in FIG. Secure with.
By moving the air duct in this way and fixing it at the position shown in FIG. 17, the rear opening of the container 51 can be opened to the maximum, so that unloading is not hindered even when the load is large. . Since the air duct is fixed to the inner surface of the container, the operation of the air shutter can be started simultaneously with the opening of the rear door.

  18 to 19 show a seventh embodiment of the present invention in the case where a truck for transportation is connected to a truck booth to load or unload a load. In this case, as shown in FIG. 19, rear doors 62a and 62b are provided. The rear part is inserted into the entrance of the truck booth 65, and the cargo is unloaded or loaded in a state where the gap between the entrance of the truck booth 65 and the container 61 of the truck is sealed by a shielding means 66 such as a vinyl curtain or an air shelter. The doors 62a and 62b cannot be fully opened. In this case, the air shutter is operated at the positions of the air ducts 63a and 63b shown in FIG.

Next, an eighth embodiment in which the air shutter of the present invention is applied to a sliding door of a train in which the interior of the vehicle is air-conditioned will be described with reference to FIGS.
20 to 22, air ducts 73a and 73b are provided on the inner side of the automatic sliding doors 72a and 72b of the train and on both sides of the sliding doors 72a and 72b. In the air duct, a portion where the wind direction plate 74a is provided forms a blowing space 74, and an air blowing fan (not shown) is provided on the upstream side of the wind direction plate 74a. A portion facing the blowing space 74 at the same height is the suction space 75, and the air circulation flow F is formed between the air ducts 73a and 73b by such an arrangement.
76 is a wind avoiding plate that partitions between the seat 77 and the air ducts 73 a and 73 b, and 78 is a window installed above the seat 77.

  In the eighth embodiment, inside the slide doors 72a and 72b, an independent air circulation flow F is formed between the air ducts 73a and 73b at the first while the surrounding air is taken in, so the slide doors 72a and 72b are opened. Even in the event, the air inside and outside the train can be completely blocked, and the air conditioning temperature inside the train can be maintained. At that time, since the seat 77 and the air ducts 73a and 73b are partitioned by the wind avoiding plate 76, the air circulation flow F does not hit the passenger sitting on the seat 77.

  According to the present invention, a person such as a truck, a train, a bus, or a transported object enters and exits, and the inside of the vehicle is air-conditioned and provided at the opening of the entrance / exit of the vehicle having a temperature difference between the inside and outside air, and has a simple structure. Thus, it is possible to provide an air shutter for a vehicle that does not hinder the entry and exit of people and objects, efficiently blocks the air flow, and does not cause a decrease in cooling / heating efficiency, refrigeration / refrigeration efficiency, or the like.

(A) is an elevation sectional view concerning the 1st example of the present invention, and (b) is a plane sectional view of the 1st example. It is an expanded sectional view of the left air duct 1a of FIG. (A) is an elevation sectional view concerning the 2nd example of the present invention, and (b) is a plane sectional view of the 2nd example. It is an expanded sectional view of the left air duct 11a of FIG. (A) is an elevation sectional view concerning the 3rd example of the present invention, and (b) is a plane sectional view of the 3rd example. It is an enlarged view of the left air duct 21a of FIG. It is a perspective view which concerns on 4th Example which applied this invention to the container rear door of the refrigerator-freezer truck. It is a perspective view which concerns on the said 4th Example. It is a perspective view which concerns on the said 4th Example. It is a perspective view which concerns on the said 4th Example. It is a perspective view which concerns on 5th Example which applied this invention to the container rear door of the refrigerator-freezer truck. It is an elevational view of the fixing plate according to the fifth embodiment. It is a perspective view which concerns on 6th Example which applied this invention to the container rear door of the refrigeration freezing truck. It is a perspective view which concerns on the said 6th Example. It is a perspective view which concerns on the said 6th Example. It is a perspective view which concerns on the said 6th Example. It is a perspective view which concerns on the said 6th Example. It is a perspective view which concerns on 7th Example which applied this invention to the container rear door of the refrigerator-freezer truck. In the said 7th Example, it is a longitudinal cross-sectional view which shows the case where a freezer refrigerator truck is installed in the truck booth. It is the elevation which concerns on 8th Example which applied this invention to the sliding door of a train. It is a top view concerning the 8th example. (A) is sectional drawing which follows the AA line in FIG. 21, (b) is sectional drawing which follows the BB line in FIG.

Explanation of symbols

1a, 1b, 11a, 11b, 21a, 21b, 33a, 33b, 43a, 43b, 53a, 53b, 63a, 63b, 73a, 73b Air ducts 2, 12, 22 Air outlet fans 3, 13, 23, 74a 3a, 13a, 23a Throttle part 4, 14, 24 Partition 25, 74 Blowing space 25a Blowing path 26, 75 Suction space 26a Suction path 31, 41, 51, 61 Containers 32a, 32b, 42a, 42b, 52a, 52b, 62a , 62b Rear doors 44a, 44b, 54a, 54b, 64a, 64b Fixed plates 45a, 45b, 46a, 48a Hinge shaft 47a Groove 49a Folding part 50a Wheel or roller 65 Truck booth 72a, 72b Automatic sliding door 76 Wind avoidance plate 77 Seat 78 windows

Claims (9)

  In an air shutter that is air-conditioned and is provided at the opening of the entrance / exit of a vehicle having a temperature difference between the inside and outside air, air ducts are provided upright on both sides of the opening. In both air ducts, at the same height, an air outlet is provided in one air duct and an air inlet is provided in the other air duct so as to face each other, and at a certain height, the air outlet and the air inlet are A vehicle air shutter characterized in that the arrangement is reversed and a horizontal air circulation flow is formed in the opening to block the inside and outside air of the vehicle.   2. The vehicle air shutter according to claim 1, wherein the air outlet and the air inlet of the air duct are arranged so as to form a plurality of air circulation flows.   2. The vehicle air shutter according to claim 1, wherein an air blowing fan is provided inside the air duct.   The air blowing fan is provided in the air duct so that the air blowing direction is in the vertical direction, an air suction port is provided on the upstream side in the air blowing direction, and an air outlet is provided on the downstream side in the air blowing direction. The vehicular air shutter according to claim 1.   5. The vehicle air shutter according to claim 4, wherein the air blowing fan is disposed below the air duct, and the air blowing fan and the air duct are communicated with each other through a communication pipe.   The air duct is provided inside the cargo bed or inside the opening / closing door at an opening provided at the rear part of the loading platform of the transport truck so that the air duct faces both sides of the opening with the opening / closing door opened. The vehicle air shutter according to claim 1, wherein the air shutter is provided.   2. The vehicle air shutter according to claim 1, wherein a throttle is provided at the air outlet to maintain a wind speed of air blown from the air outlet.   8. The vehicle air shutter according to claim 7, wherein the air duct is movable to a position where the air duct does not block the opening with the open / close door open.   The vehicle air shutter according to claim 1, wherein the air duct is provided inside a train door.

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