JP2008215724A - Air curtain device and its housing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air curtain device and its housings capable of preventing degradation of heat insulating effect. <P>SOLUTION: This air curtain device has a pair of housings 3R, 3L having supply openings 11R, 11L for supplying the air to the external and suction openings 13R, 13L for sucking the air inside, and air distributing portions 15R, 15L respectively disposed in the pair of housings 3R, 3L for distributing the air from the supply openings 11R, 11L, storing portions 21R, 21L, 23R, 23L for temporarily storing the air are disposed inside of the pair of housings 3R, 3L, the supply opening 11R and the suction opening 15R of one of the housings 3R are respectively opposed to the suction opening 15L and the supply opening 13L of the other housing 3L, and the air supplied from the air distributing portion 15R is circulated successively to the suction opening 13L, the supply opening 13L and the suction opening 13R from the supply opening 11R. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air curtain device and a casing thereof.

Conventionally, an air curtain device as a device that blocks heat from entering and exiting in a space where there is a temperature difference from the outside, such as a warehouse such as a freezer where the temperature is controlled, or a department store store that is cooled or heated Is used. In this way, the cost for temperature management, cooling, and the like can be reduced by blocking the heat input and output from the outside.
The air curtain device is used to prevent invading insects and the like from the outside.

  As the above-mentioned air curtain device, one that blows air from above toward the floor surface to form an air flow curtain (air curtain) is known. This air curtain blocks the inflow and outflow of air between an internal space such as a freezer and the outside, and blocks the flow of heat to and from the outside.

However, as described above, in the method in which air is blown from above toward the floor surface, the air flow collides with the floor surface and most of the air flows out to the outside, but a part of the air flows into the internal space. At this time, a slight amount of air was flowing in from the outside along with the air flow flowing into the internal space. For this reason, there is a problem that the external air flowing into the internal space increases as time elapses and the heat blocking effect is reduced.
For this reason, various techniques for preventing a decrease in the heat blocking effect have been proposed (see, for example, Patent Document 1).
JP 2000-249382 A (5th page, FIG. 4 etc.)

Patent Document 1 described above discloses a technique for forming an air curtain by moving air in a horizontal direction between a pair of air curtain devices arranged in the left-right direction.
According to this technique, a region where the air flow stagnates due to the collision is not formed, and air inflow and outflow between the outside and the internal space can be more effectively blocked.

In the air curtain device described in the above-mentioned Patent Document 1, the size of the air blowing port and the air suction port formed in one air curtain device and the other air curtain device is different. The amount of air blown from the curtain device is different from the amount of air blown from the other air curtain device.
Therefore, for example, in the air suction port of one air curtain device, there is a possibility that outside air or the like may be sucked in addition to the air blown out from the other air curtain device. In addition, at the air suction port of the other air curtain device, a part of the air blown out from one air curtain device cannot be completely sucked and may flow into the internal space or the like.
By continuing such air circulation between the pair of air curtain devices, external air may flow into the internal space, and the heat insulation effect may be reduced.

  Further, a cylindrical sirocco fan having a long axial length is used as a fan of an air curtain device. The sirocco fan is supplied with air flowing from the suction port from one end in the axial direction. On the other hand, air is less likely to be supplied at the end of the sirocco fan far from the suction port. Thus, if the amount of air supplied at both ends of the sirocco fan is different, the flow velocity distribution of the air blown out from the air outlet becomes non-uniform. If the flow velocity distribution is non-uniform, external air may flow into the internal space from a region where the flow velocity is slow, which may reduce the heat insulation effect.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an air curtain device and a casing thereof that can prevent a decrease in heat insulation effect.

In order to achieve the above object, the present invention provides the following means.
The air curtain device of the present invention includes a pair of housings provided with a blowout port for blowing air to the outside and a suction port for sucking air into the inside, and a pair of housings provided in the pair of cases, and air is blown from the blowout port. A storage section for temporarily storing air inside the pair of casings, and the other casing with respect to the air outlet and the suction port in one casing. The air inlet and the air outlet in the body are arranged to face each other, and the air blown out by the air blower is sent from the air outlet of the one housing to the air inlet of the other housing and the other housing. The air outlet is circulated in the order of the air inlet of the one casing.

  According to the present invention, since the storage part that temporarily stores air is provided inside the housing, the flow velocity distribution of the air blown out from the outlet through the storage part can be made uniform. Therefore, an air curtain having a uniform flow velocity distribution can be formed between a pair of housings, and external air may flow into the internal space (for example, in the freezer) from a region where the flow velocity of the air curtain is low as in the conventional case. It is possible to prevent a decrease in the heat insulation effect.

  As an arrangement | positioning place of a storage part, the space between a suction inlet and a ventilation part can be mentioned, for example. By arranging the storage portion at this position, the flow velocity distribution of the air sucked into the blower portion can be made uniform, so that the flow velocity distribution of the air blown out from the outlet by the blower portion can be made uniform. . Moreover, the example which arrange | positions a storage part between a ventilation part and a blower outlet can also be given. By disposing the storage portion at this position, the flow velocity distribution of the air blown out from the outlet can be made uniform even if the flow velocity distribution of the air blown out from the blower portion is not uniform.

  In addition, since air is circulated between the one housing and the other housing by the blower unit to form an air curtain, external air or air in the internal space is mixed into the circulating air, or the circulation Can be prevented from flowing into the internal space, and the heat insulation effect can be prevented from decreasing.

  In the above invention, at least one of a flow direction of air sucked into the blower part or a flow direction of air blown from the blower part is air between the one casing and the other casing. It is desirable that the air blowing section is arranged so as to intersect with the surface where the circulates.

  According to the present invention, at least one of the flow direction of the air sucked into the blower part or the flow direction of the air blown out from the blower part is a direction intersecting the surface through which the air circulates. The flow velocity distribution of the air blown out from the outlet can be made uniform.

  When the flow direction of the air sucked into the blower is a direction intersecting the surface through which the air circulates, by making the flow velocity distribution of the air sucked into the blower uniform, from the blower The flow velocity distribution of the blown air can be made uniform. That is, since the flow direction of the air is bent before being sucked into the blower, a region where the flow is temporarily stagnated is formed. Since air passes through this stagnation region, the flow velocity distribution becomes uniform when sucked into the blowing section.

When the flow direction of the air blown out from the blower is a direction intersecting with the surface through which the air circulates, the flow direction of the air blown out from the blower is bent to blow out from the blower outlet. The flow velocity distribution of the generated air can be made uniform.
That is, since the flow direction of the air is bent before it is blown out from the outlet, a region where the flow is temporarily stagnated is formed. Since air passes through this stagnation region, the flow velocity distribution becomes uniform when it is blown out from the outlet.

In the said invention, it is desirable for the ventilation capability of the said ventilation part each provided in said pair of housing | casing to be substantially equivalent.
According to the present invention, since the air blowing capacity of the air blowing sections provided in the pair of housings is substantially the same, for example, external air is mixed in or circulated between the air circulated between the pair of housings. It is possible to prevent a part of the air from flowing into the internal space (for example, inside the freezer).

  In the above-described invention, a separation portion that separates the air outlet and the air inlet at a predetermined interval is provided between the air outlet and the air inlet in the one housing and the other housing. It is desirable.

  According to the present invention, since the separation portion is provided to separate the air outlet and the suction port from each other at a predetermined interval, the air that is blown from the air outlet of one housing and flows into the air suction port of the other housing And the flow of air that is blown out from the outlet of the other casing and flows into the suction port of the other casing can be prevented from colliding with each other.

  The housing of the air curtain device of the present invention is a housing of an air curtain device that forms a circulating flow of air between a pair of housings, and the pair of housings has an air outlet that blows air to the outside, A suction port for sucking air inside and a storage part for temporarily storing air are provided, and the air outlets provided in the pair of housings are formed in substantially the same area. The provided suction port is formed in substantially the same area.

  According to the present invention, since the storage unit that temporarily stores air is provided in the housing, when the air blowing unit is provided in the housing, the air flow having a uniform flow velocity is blown out from the air outlet. Can do. Therefore, an air curtain having a uniform flow velocity distribution can be formed between a pair of housings, and external air may flow into the internal space (for example, in the freezer) from a region where the flow velocity of the air curtain is low as in the conventional case. There is no, and the fall of the heat insulation effect can be prevented.

  Since the areas of the air outlets provided in the pair of housings are substantially the same and the areas of the suction ports formed in the pair of housings are substantially the same, the air flow rate that is sucked and blown in one housing And the flow rate of air sucked and blown in the other housing can be made substantially the same. Therefore, for example, it is possible to prevent external air from being mixed into the air circulated between the pair of housings or a part of the circulated air from flowing into the internal space (for example, inside the freezer).

  According to the air curtain device and the housing of the present invention, since the storage portion for temporarily storing air is provided inside the housing, the flow velocity distribution of the air blown out from the outlet through the storage portion is obtained. It can be made uniform. Therefore, an air curtain having a uniform flow velocity distribution can be formed between a pair of housings, and external air may flow into the internal space (for example, in the freezer) from a region where the flow velocity of the air curtain is low as in the conventional case. There is no effect, and it is possible to prevent the heat insulation effect from being lowered.

An air curtain device according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view illustrating the overall configuration of the air curtain device according to the present embodiment. FIG. 2 is a top view for explaining the overall configuration of the air curtain device of FIG. 1.
In the present embodiment, an air curtain device will be described as applied to an air curtain device used at an entrance of a refrigerator serving as a distribution relay base.

As shown in FIGS. 1 and 2, the air curtain device 1 is schematically configured from a pair of housings 3R and 3L on the left and right. The casings 3 </ b> R and 3 </ b> L are arranged outside the entrance door 7 of the refrigerator 5 and adjacent to the left and right of the entrance 9.
In the present embodiment, the doorway door 7 is described as being applied to a pair of left and right doors, but may be a single door or an open doorway that does not include a door. There is no particular limitation.

FIG. 3 is a perspective view for explaining the configuration of a housing arranged on the right side of the air curtain device of FIG. 1.
The right casing (one casing) 3R disposed on the right side of the air curtain device 1 in a front view is formed in a substantially cubic shape with a hollow inside, and air is supplied to the surface facing the left casing 3L described later. An air outlet 11R that is an opening that blows out the air and an air inlet 13R that is an opening that sucks air into the inside are formed.
In addition, a fan device (air blowing unit) 15R that blows out air sucked from the suction port 13 from the air outlet 11R is arranged inside the right housing 3R. A base 17 for driving a fixing bolt for fixing the right housing 3R to the floor surface is provided at the lower end of the right housing 3R.

The suction port 13R is formed over substantially the entire width in the depth direction on the surface facing the left housing 3L above the right housing 3R. Further, a mesh (not shown) is disposed in the suction port 13R to prevent entry of foreign matters such as dust.
The blower outlet 11R is formed so as to cover a part in the depth direction on the surface below the right housing 3R and facing the left housing 3L. Moreover, the blower outlet 11R is formed so as to be located at the end of the refrigerator 5 side (the back side in FIG. 3) on the surface facing the left housing 3L. In addition, a rectifying grid (not shown) that arranges the air flow to be blown out is disposed at the air outlet 11R.
A separation portion 19 is formed between the suction port 13R and the outlet 11R to separate the suction port 13R and the outlet 11R by a predetermined distance.

  The fan device 15R is a blower device including an axial fan and a motor that rotationally drives the axial fan. The external dimensions of the fan device 15R are substantially the same as those of the air outlet 11R in the vertical direction (vertical direction in FIG. 3), and the horizontal direction (horizontal direction in FIG. 3) and depth direction (depth in FIG. 3). Both (directions) are dimensions that form a space between the right housing 3R.

The fan device 15R is a wall surface on the refrigerator 5 side (the back side in FIG. 3) below the right housing 3R and is in contact with the wall surface on the left housing 3 side (the left side in FIG. 3). Yes. Therefore, on the front side (front side in FIG. 3) and the right side (right side in FIG. 3) of the fan device 15R, the first storage space (storage part) 21R and the second storage space for temporarily storing air, respectively. (Storage part) 23R is formed.
An opening 25 for sucking air into the fan device 15R is formed on the front surface of the fan device 15R.

FIG. 4 is a perspective view for explaining the configuration of a housing disposed on the left side of the air curtain device of FIG. 1.
The left casing (the other casing) 3L disposed on the left side of the air curtain device 1 in a front view is formed in a substantially cubic shape having a hollow inside, similar to the above-described right casing 3R. The suction port 13L is formed. In addition, a fan device (air blower) 15L is disposed inside, and a base 17 is provided at the lower end.

The suction port 13L is formed over substantially the entire width in the depth direction on the surface below the left housing 3L and facing the right housing 3R. Further, a mesh (not shown) is disposed in the suction port 13L to prevent entry of foreign matters such as dust.
The air outlet 11L is formed so as to cover a part in the depth direction on the surface facing the right housing 3R above the left housing 3L. Moreover, 11 L of blower outlets are formed so that it may be located in the refrigerator 5 side (back side in FIG. 4) end in the surface facing the right housing | casing 3R. In addition, a rectifying grid (not shown) that arranges the air flow to be blown out is disposed at the air outlet 11L.
A separation portion 19 is formed between the suction port 13L and the outlet 11L to separate the suction port 13L and the outlet 11L by a predetermined distance.

The fan device 15L is a blower device that includes an axial fan and a motor that rotationally drives the axial fan.
The external dimensions of the fan device 15L are substantially the same as those of the air outlet 11L in the vertical direction (vertical direction in FIG. 4), and the horizontal direction (horizontal direction in FIG. 4) and depth direction (depth in FIG. 4). Both (directions) are dimensions that form a space between the left housing 3L.
Note that the fan device 15L and the fan device 15R have the same air blowing capability, and generally commercially available products may be used.

The fan device 15L is a wall surface on the refrigerator 5 side (back side in FIG. 4) above the left housing 3L and is in contact with the wall surface on the right housing 3 side (right side in FIG. 4). Yes. Therefore, on the front side (front side in FIG. 4) and the left side (right side in FIG. 4) of the fan device 15 </ b> L, the first storage space (storage unit) 21 </ b> L and the second storage space ( (Storage part) 23L is formed.
An opening 25 for sucking air into the fan device 15L is formed on the front surface of the fan device 15L.

Next, the operation of the air curtain device 1 having the above configuration will be described.
When the air curtain device 1 is switched on, the motors of the fan devices 15R and 15L rotate at a constant speed.

  When the fan device 15R rotates, as shown in FIG. 3, air flows into the right housing 3R from the suction port 13R and flows downward. The air that flows downward flows into the second storage space 23R on the right side of the fan device 15R, and then flows toward the fan device 15R. The air flow toward the fan device 15R collides with the fan device 15R, changes the flow direction to the near side (front side in FIG. 3), and flows into the first storage space 21R on the near side of the fan device 15R.

  The air that has flowed into the first storage space 21R flows into the fan device 15R from the opening 25 and is blown out toward the refrigerator 5 side. The air blown out from the fan device 15R is blown out from the air outlet 11R toward the left housing 3L along the wall surface of the right housing 3R.

The air blown out from the blower outlet 11R flows toward the left housing 3L while gradually diffusing, and is sucked into the suction port 13L.
The air sucked into the left housing 3L from the suction port 13L flows upward as shown in FIG. The air that flows upward flows into the second storage space 23L on the left side of the fan device 15L, and then flows toward the fan device 15L. The air flow toward the fan device 15L collides with the fan device 15L, changes the flow direction to the near side (front side in FIG. 4), and flows into the first storage space 21L on the near side of the fan device 15L.

The air that has flowed into the first storage space 21L flows into the fan device 15L from the opening 25 and is blown out toward the refrigerator 5 side. The air blown out from the fan device 15L is blown out from the air outlet 11L toward the right housing 3R along the wall surface of the left housing 3L.
Thereafter, the blown air is sucked into the right housing 3R from the suction port 13R, and the above-described process is repeated.

  Here, as an example of specific dimensions of the air curtain device 1, the distance between the right housing 3R and the left housing 3L is 2.4 m (2400 mm), and the heights of both the housings 3R and 3L. Is 2.6 m (2600 mm), the width in the left-right direction is 0.9 m (900 mm), and the width in the depth direction is 0.45 m (450 mm). In this case, the vertical lengths of the fan devices 15R and 15L are 1 m (100 mm), and the vertical length of the separating portion 19 is 0.3 m (300 mm).

  According to the above configuration, the first storage spaces 21R and 21L and the second storage portions 23R and 23L for temporarily storing air are provided inside the right housing 3R and the left housing 3L. The flow velocity distribution of the air sucked into the fan devices 15R and 15L through the storage spaces 21R and 21L and the second storage portions 23R and 23L and blown out from the outlets 11R and 11L can be made uniform. Therefore, an air curtain having a uniform flow velocity distribution can be formed between the right housing 3R and the left housing 3L, and external air flows from the region where the flow velocity of the air curtain is low as in the conventional case to the internal space (for example, There is no fear of flowing into the freezer), and a decrease in heat insulation effect can be prevented.

  Further, since air is circulated between the right housing 3R and the left housing 3L by the fan devices 15R and 15L to form an air curtain, the air outside the refrigerator 5 or the air inside the refrigerator 5 is used as the circulating air. It can prevent mixing and the circulating air flowing into the refrigerator 5, and can prevent the heat insulation effect from decreasing.

  The air sucked into the fan devices 15R and 15L collides with the fan devices 15R and 15L in the second storage spaces 23R and 3L and changes the flow direction toward the front, and then the refrigerator 5 in the first storage spaces 21R and 21L. The direction of the flow is changed to the side. That is, in the first storage space 21R, 21L and the second storage space 23R, 3L, the direction of the air flow is changed, and a region where the flow is stagnated is formed, so the flow velocity distribution of the air sucked into the fan devices 15R, 15L Can be made uniform. As a result, the flow velocity distribution of the air blown out from the fan devices 15R and 15L can be made uniform, and the flow velocity distribution of the air blown out from the blowout ports 11R and 11L can be made uniform.

  Moreover, since the flow of air blown toward the refrigerator 5 from the fan devices 15R, 15L collides with the wall surfaces of the housings 3R, 3L and is bent, the flow velocity distribution of the air blown from the blowout ports 11R, 11L is It becomes uniform. That is, since the air is bent in the flow direction before being blown out from the outlets 11R and 11L, a region where the flow is temporarily stagnated is formed. Since air passes through this stagnation region, the flow velocity distribution becomes uniform when blown out from the blowout ports 11R and 11L.

Since the fan devices 15R and 15L have substantially the same blowing capacity, air outside the refrigerator 5 is mixed in the air circulated between the right housing 3R and the left housing 3L, or a part of the circulated air. Can be prevented from flowing into the refrigerator 5.
That is, since the air flow rate sucked from the suction ports 13R and 3L and the air flow rate blown from the air outlets 11R and 11L are substantially equal, excess air is not sucked from the air inlets 13R and 3L. The air blown out from 11R and 11L does not overflow without being sucked into the suction ports 13R and 3L.

Since the separating portion 19 is provided and the air outlet 11R and the air inlet 13R and the air outlet 11L and the air inlet 13L are separated from each other by a predetermined interval, the air is blown from the air outlet 11R and flows into the air inlet 13L. It is possible to prevent the air flow from colliding with the air flow blown out from the air outlet 11L and flowing into the suction port 13R.
Therefore, the turbulence of the circulating air flow can be prevented, the outside air can be prevented from flowing into the refrigerator 5 from the region where the flow is disturbed, and the heat insulation effect can be prevented from being lowered.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the present invention has been described as being applied to an air curtain device used for an entrance / exit of a refrigerator. However, the present invention can be applied to an air curtain device used for an entrance / exit of a department store or a building. .

  Moreover, like the above-mentioned embodiment, an air storage part may be arrange | positioned at the air suction side of fan apparatus 15R, 15L, and an air storage part may be arrange | positioned at the air blowing side of fan apparatus 15R, 15L. There is no particular limitation.

It is a front view explaining the whole structure of the air curtain device in a 1st embodiment of the present invention. It is a top view explaining the whole structure of the air curtain apparatus of FIG. It is a perspective view explaining the structure of the housing | casing arrange | positioned at the right side in the air curtain apparatus of FIG. It is a perspective view explaining the structure of the housing | casing arrange | positioned at the left side of the air curtain apparatus of FIG.

Explanation of symbols

1 Air curtain device 3R Right housing (one housing)
3L left housing (the other housing)
11R, 11L Air outlet 13R, 13L Air inlet 15R, 15L Fan device (air blower)
19 Separation part 21R, 21L 1st storage space (storage part)
23R, 23L 2nd storage space (storage part)

Claims (5)

A pair of housings provided with an air outlet for blowing air to the outside and a suction port for sucking air into the interior;
An air blower that is provided in each of the pair of housings and blows air out of the air outlet;
Inside the pair of housings, a storage unit for temporarily storing air is provided,
The air inlet and the air outlet in the other housing are respectively arranged to face the air outlet and the air inlet in one housing,
The air blown out by the air blower from the air outlet of the one housing to the air inlet of the other housing, the air outlet of the other housing, and the air inlet of the one housing. An air curtain device that is circulated in order.   At least one of the flow direction of the air sucked into the blower part or the flow direction of the air blown out from the blower part is a surface where the air circulates between the one casing and the other casing. The air curtain device according to claim 1, wherein the air blowing unit is disposed so as to intersect with each other.   3. The air curtain device according to claim 1, wherein the air blowing capacity of the air blowing units provided in the pair of housings is substantially equal. 4.   Between the one casing and the other casing, between the blowout opening and the suction opening, there is provided a separating portion that separates the blowout opening and the suction opening at a predetermined interval. The air curtain device according to any one of claims 1 to 3. A casing of an air curtain device that forms a circulating flow of air between a pair of casings,
The pair of housings are provided with a blowout port that blows air to the outside, a suction port that sucks air inside, and a storage unit that temporarily stores air,
The air outlets provided in the pair of housings are formed in substantially the same area,
A casing of an air curtain device, wherein the suction ports provided in a pair of casings are formed in substantially the same area.

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