JP7272017B2 - AIR CURTAIN DEVICE AND AIR CURTAIN FORMING METHOD - Google Patents

Description

The present invention relates to an air curtain device and an air curtain forming method for forming an air curtain so as to block a first space and a low temperature and low humidity second space.

For example, a refrigerated warehouse includes a low temperature room such as a refrigerating room, and an antechamber such as a cargo handling room on the loading/unloading side. When the articles are carried from the anterior chamber to the low-temperature chamber, heat and moisture enter the low-temperature chamber from the anterior chamber.

In order to address the problem of heat and moisture infiltration, Patent Document 1 sends out air adjusted to the required temperature and humidity to the front chamber. As a result, when the door between the refrigerating chamber and the front chamber is opened, the air in the refrigerating chamber is prevented from flowing into the front chamber, thereby preventing the temperature of the front chamber from dropping rapidly.

Further, Patent Document 2 describes an air curtain structure for preventing dew condensation caused by warm air entering a low-temperature warehouse. Further, in Patent Document 3, a refrigerating compartment air curtain device is provided inside the refrigerating compartment, and a refrigerating compartment outside air curtain device is provided outside the refrigerating compartment. A dehumidifying device is provided outside the refrigerating compartment, and the dehumidifying device dehumidifies the air sucked into the air curtain device outside the refrigerating compartment. With this, dehumidified air can be blown down in the vicinity of the loading/unloading door, and high humidity outside air can be suppressed from entering the inside of the refrigerating compartment.

JP-A-2006-349221 Japanese Patent Application Laid-Open No. 2002-303477 JP 2017-166725 A

However, the ability of the air conditioner disclosed in Patent Document 1 to adjust the temperature and humidity of the antechamber to a required level depends on the volume and shape of the antechamber. Therefore, the configuration of Patent Document 1 requires an optimum air conditioner each time depending on the volume and shape of the front chamber, resulting in poor versatility and high cost. Moreover, in Patent Document 2, it is necessary to provide a large-scale dehumidifying chamber, which increases the size of the entire apparatus. Furthermore, in Patent Document 3, a dehumidifier is installed outside the refrigerating room air curtain device to absorb and dehumidify the high-temperature and high-humidity outside air. must be used.

The present invention has been made in view of such circumstances, and an air curtain device capable of suppressing the amount of moisture entering a low-temperature, low-humidity space and reducing the size and cost of a dehumidifier. and to provide a method for forming an air curtain.

In the air curtain device of one aspect of the present invention, the first space and the second space are separated from each other in a state in which the space between the first space and the second space having a lower temperature and lower humidity than the first space is opened. An air curtain device that forms an air curtain so as to block the An air curtain device main body including a dehumidifier that dehumidifies air supplied from a first air suction port, and a first air outlet that blows out the dehumidified air to form a dehumidified air curtain, The air suction port is located close to the first air outlet and closer to the second space than the first air outlet , and furthermore, a second air suction port for sucking air in the first space. , wherein the air curtain device main body includes a mixing section for adjusting a mixing ratio of each air sucked from the first air suction port and the second air suction port.

An air curtain forming method according to an aspect of the present invention includes a state in which a first space and a second space having a lower temperature and lower humidity than the first space are opened, and the first space and the second space are separated from each other. An air curtain forming method using the above-described air curtain device for forming an air curtain so as to block the air from the The dehumidifying air curtain is blown out to form a dehumidifying air curtain, and at the same time, part of the air current of the dehumidifying air curtain flows toward the second space to form a stagnation area. The mixing ratio of each air sucked from the first air suction port and the second air suction port is adjusted .

According to the present invention, it is possible to form at least a dehumidifying air curtain that blocks the space between the first space and the second space, and to suppress the amount of water entering the low temperature and low humidity second space.

Then, according to the present invention, the first air suction port is brought close to the first air outlet so that part of the airflow of the dehumidifying air curtain flows toward the second space to form a retention area. It was arranged closer to the second space than the air outlet. As a result, the air sucked by the first air suction port has a lower humidity than the air in the first space, making it possible to reduce the amount of dehumidification. Therefore, it is possible to reduce the size and cost of the dehumidifier.

1 is a conceptual diagram of an air curtain device according to a first embodiment of the invention; FIG. FIG. 4 is a psychrometric diagram when using the air curtain device according to the embodiment of the present invention; FIG. 2 is a conceptual diagram showing the internal configuration of the air curtain device main body of the first air curtain device according to the embodiment of the present invention; FIG. 5 is a conceptual diagram showing a modification of the first air curtain device according to the embodiment of the invention; FIG. 5 is a conceptual diagram showing a modification of the first air curtain device according to the embodiment of the invention; FIG. 2 is a conceptual diagram of an air curtain device according to a second embodiment of the invention; It is a graph for demonstrating the air inflow suppression effect to a low-temperature room. FIG. 7 is a conceptual diagram of an air curtain device according to a third embodiment of the invention;

An embodiment of the present invention (hereinafter abbreviated as "embodiment") will be described in detail below. It should be noted that the present invention is not limited to the following embodiments, and can be modified in various ways within the spirit and scope of the invention.

<First embodiment>
FIG. 1 is a conceptual diagram of an air curtain device according to a first embodiment of the invention. The structure of the air curtain device as well as the method of forming the air curtain will be described below. In FIG. 1 , it has a front chamber 30 as a first space and a low-temperature chamber 40 as a second space having a lower temperature and humidity than the front chamber 30 . The front compartment 30 is, for example, a refrigerator compartment, and the low temperature compartment 40 is, for example, a freezer compartment.

As shown in FIG. 1, an upper frame 50 and an openable door (not shown) are provided between the front chamber 30 and the low temperature chamber 40 . Without limitation, the door is, for example, an insulated door. FIG. 1 shows a state in which the door is opened to open between the front chamber 30 and the low temperature chamber 40 . Further, floor surfaces 30a and 40a of the front chamber 30 and the low temperature chamber 40 are formed as continuous surfaces.

An upper frame 50 partitioning between the front chamber 30 and the low temperature chamber 40 extends vertically downward from the ceiling, for example. An extension of the upper frame 50 is the boundary between the front chamber 30 and the low temperature chamber 40 .

As shown in FIG. 1, the front chamber 30 is provided with the first air curtain device 1 fixed to the side surface of the upper frame 50 on the front chamber 30 side. The fixing position of the first air curtain device 1 is not limited, and the first air curtain device 1 can be fixed to the ceiling of the front room 30 near the boundary between the front room 30 and the low temperature room 40. can also

As shown in FIG. 1, the low temperature chamber 40 is provided with a second air curtain device 20 fixed to the side surface of the upper frame 50 on the low temperature chamber 40 side. The fixing position of the second air curtain device 20 is not limited, and the second air curtain device 20 may be fixed to the ceiling on the side of the low temperature chamber 40 near the boundary between the front chamber 30 and the low temperature chamber 40. can.

In the first embodiment shown in FIG. 1, the combination of the first air curtain device 1 and the second air curtain device 20 constitutes an "air curtain device".

As shown in FIG. 1, the first air curtain device 1 includes a first air suction port 2, an air curtain device main body 3 having a built-in dehumidifier capable of dehumidifying the air sucked from the first air suction port 2, and a first air outlet 4 that blows out dehumidified air to form a dehumidified air curtain 5. - 特許庁

As shown in FIG. 1, the first air suction port 2 and the first air outlet 4 are arranged on the same plane of the air curtain device main body 3, that is, the lower portion 3a. Therefore, the air dehumidified by the dehumidifier is blown downward from the first air outlet 4 and reaches the floor surface 30a. In this embodiment, the first air curtain device 1 can form the dehumidifying air curtain 5 extending from the position of the first air outlet 4 to the floor surface 30a.

On the other hand, the second air curtain device 20 has an air suction port 21 for sucking low-temperature, low-humidity air in the low-temperature chamber 40 and an air outlet 22 for blowing the sucked air downward. The air blown out from the air outlet 22 reaches the floor surface 40 a of the low temperature chamber 40 . Thus, the second air curtain device 20 can form the air curtain 23 for blowing air that reaches from the position of the air outlet 22 to the floor surface 40a. Unlike the dehumidifying air curtain 5, the air curtain 23 for blowing air is not dehumidified by a dehumidifier.

Thus, in the first embodiment, both the dehumidifying air curtain 5 and the blowing air curtain 23 are used to block the front chamber 30 and the low temperature chamber 40 . As a result, even when the front chamber 30 and the low-temperature chamber 40 are open (the door is opened), the high-temperature and high-humidity air in the front chamber 30 does not flow into the low-temperature chamber 40 than in the low-temperature chamber 40. can be suppressed. The effect of suppressing moisture penetration and the effect of suppressing heat penetration are exhibited regardless of the size and shape of the low-temperature chamber 40 . In particular, as shown in FIG. 1, the dehumidified air curtain 5 can form a dehumidified air retention area R1 and an intermediate area R2, which will be described later, to more effectively suppress the amount of moisture and heat flowing into the low-temperature chamber 40. be able to.

A system for dehumidifying the high-humidity air that has flowed into the low-temperature chamber 40 has also been developed. The problem is that it is necessary.

On the other hand, in the present embodiment, since the air curtain is formed using only the air in the room, additional work such as a duct is not required, and the air curtain device of the present embodiment can be manufactured at a low cost. And it can be installed in a short period of time.

Further, in the present embodiment, the first air suction port 2 is arranged at a position where dehumidified air can be sucked from the first air blowout port 4 . That is, the first air suction port 2 is arranged in the lower portion 3a of the air curtain device main body 3 on the same side as the first air blowout port 4, and arranged in close proximity to each other. Moreover, the first air suction port 2 is arranged closer to the low temperature chamber 40 than the first air blowout port 4 is. Therefore, at least part of the dehumidified air blown out from the first air outlet 4 forms an air flow F1 returning to the inner side of the low temperature chamber 40 side. In this way, part of the airflow F1 of the dehumidifying air curtain 5 flows toward the low-temperature room 40, and a dehumidified air retention area R1 is generated below the first air curtain device 1. FIG.

Further, as shown in FIG. 1, by forming the dehumidifying air curtain 5 and the air curtain 23 for blowing air, an intermediate area (stagnation area) R2 of the air curtains in which the airflow circulates is formed between the air curtains 5 and 23. It is formed. The air in the intermediate region R2 has a temperature and humidity that are a mixture of the air blown by the dehumidifying air curtain 5 and the blowing air curtain 23 . Therefore, the temperature of the air in the intermediate region R2 is relatively lower than the high-temperature, high-humidity air in the front chamber 30 and higher than the low-temperature, low-humidity air in the low-temperature chamber 40 . Also, the absolute humidity of the air in the intermediate region R2 (the amount of moisture contained in the air) is lower than the high-temperature, high-humidity air in the front chamber 30 and higher than the low-temperature, low-humidity air in the low-temperature chamber 40 .

In the first embodiment shown in FIG. 1, the air in the intermediate region R2 is drawn into the airflow F1 of the dehumidifying air curtain 5, and the first air suction port of the first air curtain device 1 positioned near the intermediate region R2 2 is attracted.

As a result, compared to a configuration (hereinafter referred to as a comparative example) in which the first air curtain device 1 sucks only the high-temperature and high-humidity air in the front chamber 30 and dehumidifies it to form a dehumidifying air curtain, the first air curtain device 1 The absolute humidity (moisture content) contained in the air sucked by the air suction port 2 can be reduced. The difference in dehumidification amount between the present embodiment and the comparative example will be explained using the psychrometric diagram of FIG. The amount of dehumidification in the comparative example in which the high-temperature and high-humidity air in the front chamber 30 (front chamber air in FIG. 2) is sucked in compared to that in the low-temperature room 40, dehumidified, and blown out is shown in FIG. and the difference A1 of each absolute humidity of the blown air.

On the other hand, as in the present embodiment, when the air in the intermediate region R2 (intermediate air in FIG. 2) is sucked, dehumidified and blown out, the dehumidified amount of the intermediate air and the blown air is shown in FIG. It is indicated by the absolute humidity difference A2.

Therefore, in the present embodiment, the dehumidification amount by the dehumidifier can be reduced by the dehumidification amount A3 (=A1-A2) as compared with the comparative example. Thus, in this embodiment, the amount of dehumidification required for the dehumidifier can be reduced, and the size and cost of the dehumidifier can be reduced. Moreover, since the amount of dehumidification can be reduced, the dehumidification air curtain 5 can be formed by rapid dehumidification. Therefore, the dehumidification speed can be increased, and the dehumidification efficiency can be improved.

Further, in the present embodiment, the first air curtain device 1 can be installed near the ceiling surface above the door in the same manner as the second air curtain device 20, and the size of the first air curtain device 1 can be reduced. The storage space in the front chamber 30 is not reduced.

As shown in FIG. 1, in the first air curtain device 1, the second air suction port 6 is arranged in the upper portion 3b of the air curtain device main body 3. As shown in FIG.

In this way, the second air suction port 6 is not arranged at a position where dehumidified air can be sucked, but sucks the high-temperature and high-humidity air in the front chamber 30 . In such a place, the second air suction port 6 may be arranged on any surface of the air curtain device main body 3, and the second air suction port 6 may be located on the side portion 3c of the air curtain device main body 3, As long as it is away from the first air outlet 4, it may be arranged in the lower portion 3a. For example, since the first air curtain device 1 is installed on the ceiling surface, if the second air suction port 6 cannot be provided in the upper portion 3b of the air curtain device main body 3, it can be arranged in the side portion 3c or the like. be. Also, a plurality of second air suction ports 6 may be provided, and arranged on both sides of the upper portion 3b and the lower portion 3c of the air curtain device main body 3, for example.

Each air sucked from the first air suction port 2 and the second air suction port 6 is mixed in the air curtain device main body 3 . Then, the mixed air is dehumidified by a dehumidifier built in the air curtain device main body 3 .

In this way, the second air suction port 6 is provided at a position where dehumidified air is not sucked, and by sucking air together with the first air suction port 2, the amount of dehumidified air sucked from the first air suction port 2 can be reduced. can be done. As a result, of the dehumidified air ejected from the first air outlet 4, the amount of air sucked into the first air suction port 2 on the way to the floor surface 30a can be reduced. The dehumidifying air curtain 5 extending from the position to the floor surface 30a can be appropriately formed.

FIG. 3 is a schematic diagram of the inside of the air curtain device main body that constitutes the first air curtain device of the present embodiment.

As shown in FIG. 3 , the air curtain device main body 3 includes, for example, a mixing-type three-way valve (mixing section) 7 , a dehumidifier 8 , and a blower fan 9 . The first air suction port 2 and the three-way valve 7 are connected by a first flow path 10a. The second air suction port 6 and the three-way valve 7 are connected by a second flow path 10b. The dehumidifier 8 and the three-way valve 7 are connected by a third flow path 10c. Air dehumidified by the dehumidifier 8 can be blown out from the first air outlet 4 .

As shown in FIG. 3, the blower fan 9 is provided, for example, between the dehumidifier 8 and the first air outlet 4, in the middle of the third flow path 10c, or both.

Air from the first air suction port 2 and the second air suction port 6 is sent to the three-way valve 7 through the first flow path 10 a and the second flow path 10 b by the operation of the blower fan 9 . The air sucked through the first air suction port 2 is the intermediate air shown in FIG. 2, and the air sucked through the second air suction port 6 is the front chamber air shown in FIG.

These airs are mixed at the three-way valve 7, and the mixing rate is adjusted in advance, and the intermediate air and the front chamber air are mixed at the three-way valve 7 according to the mixing rate. Although the mixing ratio is not limited in the present embodiment, the proportion of air in the front chamber is made higher than the proportion of intermediate air. Thereby, the amount of intermediate air sucked from the first air suction port 2 can be reduced.

The mixed air is sent to the dehumidifier 8 , dehumidified, and blown out from the first air outlet 4 . By using the mixed air, the reduction amount of the dehumidification amount is smaller than that of A3 in FIG. 2, but the amount of dehumidification can be reduced compared to the case where only the front chamber air is used. Moreover, by reducing the amount of intermediate air sucked from the first air suction port 2, the dehumidifying air curtain 5 extending from the first air outlet 4 to the floor surface 30a can be properly formed.

As shown in FIG. 1, when dehumidified air is blown out from the first air outlet 4 of the first air curtain device 1 to form the dehumidified air curtain 5, the dehumidified air curtain 5 flows toward the low temperature room 40. After reaching the floor surface 30a, the airflow branches into an airflow F2 that flows along the floor surface 30a in a direction away from the low-temperature chamber 40 so as to form a retention area R1.

In FIG. 1, the first air outlet 4 is configured as one, but as shown in FIG. 4, for example, the first air outlet is separated into an inner outlet 4a and an outer outlet 4b. Then, the inner air outlet 4a located inside the first air suction port 2 can be used for forming the airflow F1, and the outer air outlet 4b can be used for forming the airflow F2. Thereby, the two airflows F1 and F2 can be appropriately branched.

As shown in FIG. 4, the outer protruding passage portion 12 including the outer blower outlet 4b is tilted so that the outer blower outlet 4b is tilted toward the front chamber 30 (outside). In FIG. 4, the inner outlet 4a faces directly downward, but the first air suction port 2 faces inward toward the low-temperature chamber 40 side. at an angle. As a result, the two airflows F1 and F2 are not affected by each other, and the airflows F1 and F2 can be split more effectively. That is, by directing the first air suction port 2 toward the low temperature chamber 40 side, the amount of air drawn into the first air suction port 2 on the way to the floor surface 30a, out of the dehumidified air blown out from the inner blowout port 4a, is reduced. can be reduced. This facilitates formation of an airflow F1 that reaches the floor surface 30a between the inner outlet 4a and the first air suction port 2. As shown in FIG. In addition, by directing the outer air outlet 4b outward, the dehumidified air is obliquely blown out from the outer air outlet 4b toward the outside (direction away from the low-temperature chamber). Accordingly, after reaching the floor surface 30a, it is easy to form the airflow F2 that flows along the floor surface 30a in the direction away from the low-temperature chamber 40. FIG.

In the present embodiment, the inclination angles of the projecting flow passages 11 and 12 are not limited, but the intended use, the size of the first air curtain device 1, the distance from the first air curtain device 1 to the floor surface 30a, etc. etc., it can be selected as appropriate.

4 can also be applied to the second air curtain device 20 shown in FIG. That is, the air curtain 23 for blowing air also branches into two, one airflow F3 forms an intermediate region R2, and the other airflow F4 reaches the floor surface 40a, and then along the floor surface 40a, It flows away from the front chamber 30 . Therefore, in order to appropriately branch these airflows F3 and F4, the outlet can be divided into two as in FIG. At this time, the outlet on the side that forms the airflow F4 can be tilted so as to face outward.

Further, as shown in FIG. 5, the heights of the first air suction port 2 and the first air blowout port 4 can be changed. In FIG. 5, the projecting channel portion 14 having the first air outlet 4 projects downward from the projecting channel portion 13 having the first air suction port 2. 1 can be provided at a position higher than the air outlet 4 . As a result, of the dehumidified air blown out from the first air outlet 4, the dehumidified air (airflow F5) sucked into the first air suction port 2 without reaching the floor surface 30a can be reduced. Therefore, the dehumidifying air curtain 5 that reaches from the position of the first air outlet 4 to the floor surface 30a can be appropriately formed.

In order to provide a difference in height between the first air suction port 2 and the first air blowout port 4, the amount of protrusion of each of the protruding passage portions 13 and 14 may be changed, or the first air A step may be provided in the lower portion 3a of the air curtain device main body 3 where the suction port 2 and the first air outlet 4 are located.

<Second Embodiment>
In the above-described first embodiment, the first air curtain device 1 installed in the front chamber 30 and the second air curtain device 20 installed in the low temperature room 40 are combined to form an "air curtain device". However, as shown in FIG. 6, it may be composed only of the first air curtain device 1 . As a result, the dehumidifying air curtain 5 that blocks the front chamber 30 and the low temperature chamber 40 can be formed, and high temperature and high humidity air can be prevented from flowing into the low temperature chamber 40 . In particular, as shown in FIG. 6, the dehumidified air curtain 5 can form a dehumidified air stagnation area R1, thereby more effectively suppressing the amount of moisture and heat flowing into the low temperature chamber 40. FIG.

Further, in the present embodiment, the first air suction port 2 is provided in the lower portion 3a of the air curtain device main body 3 where the dehumidifying air curtain 5 is formed, similarly to the first air outlet 4, and It was arranged inside the low-temperature chamber 40 side of the outlet 4 . As a result, compared to the configuration of the comparative example in which the first air curtain device 1 sucks only the air in the front chamber 30 and dehumidifies it to form a dehumidifying air curtain, the air sucked by the first air suction port 2 can reduce the absolute humidity (moisture content) contained in Therefore, the size and cost of the dehumidifier can be reduced. Also, the dehumidification air curtain 5 can be formed by rapid dehumidification. Therefore, the dehumidification speed can be increased, and the dehumidification efficiency can be improved. Also, unlike the configuration of FIG. 1, the first air curtain device 1 is used alone, so the device cost can be reduced.

Here, as shown in FIG. 1, a configuration (hereinafter referred to as " Regarding the effect of suppressing moisture intrusion from the front chamber 30 to the low-temperature chamber 40 using a configuration in which only the first air curtain device 1 is arranged (hereinafter referred to as a "single AC") , performed a simulation.

In the simulation experiment, the front chamber 30 is set to a higher temperature and higher humidity than the low-temperature chamber 40. First, the front chamber 30 and the low-temperature chamber 40 are opened. The amount of water flowing from the front chamber 30 to the low-temperature chamber 40 was measured with the case set to "no".

Next, with the front chamber 30 and the low-temperature chamber 40 open, the twin AC and the single AC were used, but without using the dehumidifying function of the first air curtain device 1, only the air curtain for blowing air was formed. The amount of water flowing from the front chamber 30 to the low-temperature chamber 40 was measured with the case of "door AC". In this case, in the twin AC, both the first air curtain device 1 and the second air curtain device 20 regulate the blowing air curtain, and in the single AC, the first air curtain device 1 regulates the blowing air curtain. is formed.

Next, in a state where the front chamber 30 and the low temperature chamber 40 are opened, the twin AC and the single AC are used, and at this time, the dehumidification function of the first air curtain device 1 is used to form an air curtain. The amount of water flowing from the front chamber 30 to the low-temperature chamber was measured as "AC + dehumidification". In this case, a dehumidifying air curtain and a blowing air curtain are formed in the twin AC, and a dehumidifying air curtain is formed in the single AC.

In the "none" simulation experiment, the amount of water infiltration flowing from the front chamber 30 into the low-temperature chamber 40 was assumed to be 1, and based on this, the ratio of the water intrusion of "door AC" and "AC+dehumidification" was obtained. The simulation experiment result is shown in FIG.

As shown in FIG. 7, both "door AC" and "AC+dehumidification" reduce the amount of moisture entering the low-temperature chamber 40 from the front chamber 30 compared to the simulation result of "none" in which no air curtain is formed. was made. In particular, it was found that by setting "AC+dehumidification", the amount of moisture entering from the front chamber 30 to the low-temperature chamber 40 can be further reduced. The simulation experiment of FIG. 7 is an example, but in this experiment, it was found that the amount of water intrusion can be reduced by about 80% to 90% by setting "AC + dehumidification" to the simulation result of "none".

In addition, it was found that the "twin AC" can more effectively reduce the amount of moisture that flows from the front chamber 30 into the low temperature chamber 40 compared to the "single AC".

As a result, the configuration of the air curtain device of FIG. 1, which is "AC + dehumidification" and "twin AC", is the most excellent in reducing the amount of moisture entering, followed by "AC + dehumidification" and "single AC", which is FIG. It was found that the configuration of the air curtain device is excellent in reducing the amount of moisture intrusion.

<Third Embodiment>
In the air curtain device shown in FIG. 8, the first air curtain device 1 is arranged alone in the front chamber 30 in the same manner as in FIG. A second air outlet 15 for blowing air into the chamber 40 is provided.

As shown in FIG. 8, with the door (e.g., heat insulating door) 51 between the front chamber 30 and the low temperature chamber 40 closed, air is blown into the low temperature chamber 40 from the second air outlet 15 of the first air curtain device 1 . , dehumidified air A is blown. Thereby, the pressure in the low temperature chamber 40 can be made higher than the pressure in the front chamber 30 (positive pressure). In particular, when the low-temperature chamber 40 has a relatively small volume, the low-temperature chamber 40 can be effectively pressurized to a positive pressure. As a result, when the door 51 is opened to open the front chamber 30 and the low-temperature chamber 40 and the dehumidifying air curtain is formed by the first air curtain device 1, the pressure in the low-temperature chamber 40 is lower than that in the front chamber 30. in high condition. Therefore, the air in the front chamber 30 can be more effectively suppressed from flowing into the low temperature chamber 40 .

In the present embodiment, the air curtain may be formed continuously regardless of whether the door 51 is opened or closed, or may be controlled so that it is not formed when the door 51 is closed and is formed only when the door 51 is opened. can do. For example, the door 51 is an automatic door, and the first air curtain device 1 can be operated in conjunction with the opening and closing of the automatic door. At this time, it is preferable to form an air curtain just before the door 51 is opened. In the embodiment shown in FIG. 8, if the air curtain is not formed with the door 51 closed, all of the air dehumidified by the dehumidifier can be blown into the low temperature chamber 40 from the second air outlet 15. can.

8 can also be applied to a twin configuration having the first air curtain device 1 and the second air curtain device 20 shown in FIG.

Further, in the present embodiment, a detection unit for detecting the approach of a detected object such as a person or an object is provided, and the operation of the air curtain device can be controlled in accordance with the approach of the detected object. Although the type of the detection unit is not limited, it may be, for example, an infrared motion sensor or a motion sensor. Further, although the installation location of the detection unit is not limited, it is preferable to install the detection unit near the door 51 because the air curtain device is preferably fully operated immediately before the door 51 opens.

When the air curtain device is operated continuously regardless of whether the door 51 is opened or closed, the output and air volume of the air curtain device are suppressed when the door 51 is closed. When the detection unit detects an object to be detected, immediately before the door 51 is opened, the first air curtain device 1 can be switched to the rapid dehumidifying operation, and the second air curtain device 20 can be switched to the rapid air blowing operation. . Thereby, the power consumption of the air curtain device can be suppressed.

The dehumidifier incorporated in the first air curtain device 1 of the present embodiment described above is, for example, a refrigerator, and can condense and dehumidify moisture below the dew point. The dehumidifier may be of a type other than a refrigerator type, for example, a dehumidifier using a dehumidifying material or the like.

In the above embodiment, the front chamber 30 is the first space and the low-temperature chamber 40 is the second space. It is a concept that includes Therefore, for example, the low temperature and low humidity second space may be a showcase, and the high temperature and high humidity first space may be a space outside the showcase. In the present embodiment, the first space and the second space are not limited, but an air curtain that blocks the first space and the second space in order to suppress the air in the first space from flowing into the second space. It is possible to apply to all configurations that form

In each of the above-described embodiments, the first air curtain device 1 is installed in the vicinity of the ceiling of the front chamber 30, and the dehumidifying air curtain 5 is formed from the ceiling to the floor. That is, in the dehumidifying air curtain 5 and the second air curtain device 20, the air curtain 23 for blowing air is formed in the downward direction. form can be applied. In this case, the directions and installation locations of the first air curtain device 1 and the second air curtain device 20 are set so that the openings of the front chamber 30 and the low temperature chamber 40 can be blocked from the left and right by the air curtains.

Although each embodiment of the present invention has been described, another embodiment of the present invention may be a combination of the above-described embodiments and modifications in whole or in part.

Moreover, the embodiments of the present invention are not limited to the above-described embodiments, and various changes, substitutions, and modifications may be made without departing from the spirit of the technical idea of the present invention. Furthermore, if the technical idea of the present invention can be realized in another way due to advances in technology or another derived technology, that method may be used. Therefore, the claims cover all embodiments that can be included within the scope of the technical concept of the present invention.

Reference Signs List 1: first air curtain device 2: first air suction port 3: air curtain device body 4: first air outlet 4a: inner outlet 4b: outer outlet 5: dehumidifying air curtain 6: second air suction port 7 : Three-way valve 8 : Dehumidifier 9 : Blower fans 11 to 14 : Protruding passage portion 15 : Second air outlet 20 : Second air curtain device 21 : Air suction port 22 : Air outlet 23 : Air curtain 30 : Front Chambers 30a, 40a: floor surface 40: low-temperature chamber 50: upper frame 51: doors F1 to F5: airflow R1: retention area R2: intermediate area

Claims (10)

An air curtain that forms an air curtain so as to block the first space and the second space in an open state between the first space and the second space having a lower temperature and lower humidity than the first space. a device,
Equipped with a first air curtain device installed at least on the first space side,
The first air curtain device includes a first air suction port, an air curtain device main body including a dehumidifier for dehumidifying the air supplied from the first air suction port, and a dehumidified air curtain by blowing out the dehumidified air. a first air outlet forming
The first air suction port is arranged close to the first air outlet and closer to the second space than the first air outlet ,
Further, it has a second air suction port for sucking air in the first space, and the air curtain device main body adjusts the mixing ratio of each air sucked from the first air suction port and the second air suction port. An air curtain device comprising a regulated mixing section . 2. An air curtain device according to claim 1 , further comprising a second air outlet for blowing air dehumidified by said dehumidifier into said second space. 3. The apparatus according to claim 1, further comprising a detection unit for detecting an approaching object to be detected, and controlling the operation of the first air curtain device in accordance with the approaching of the object to be detected. The described air curtain device. 4. The air curtain device according to claim 1, wherein the first air suction port is formed so as to be inclined toward the second space. The first air outlet is configured separately into two outlets, an outer outlet and an inner outlet,
The air curtain device according to any one of claims 1 to 4 , wherein the outer outlet is formed to be inclined toward the first space. The first air suction port and the first air blowout port are both arranged side by side on the same surface of the air curtain device main body, and the first air blowout port protrudes from the first air suction port. 6. The air curtain device according to any one of claims 1 to 5 , characterized in that: 7. The air curtain device according to claim 1 , further comprising a second air curtain device that forms an air curtain on the side of the second space. An air curtain is formed so as to block the first space and the second space in an open state between the first space and the second space having a lower temperature and lower humidity than the first space. An air curtain forming method using the air curtain device according to any one of claims 1 to 7 ,
On the first space side, the air sucked by the first air suction port is dehumidified and then blown out to form a dehumidified air curtain, and at the same time, part of the air current of the dehumidified air curtain flows to the second space side. suck air to form a stagnation area ,
An air curtain forming method, wherein the air curtain device main body adjusts a mixing ratio of each air sucked from the first air suction port and the second air suction port. When the space between the first space and the second space is closed, the air dehumidified in the first space is blown into the second space, and the pressure in the second space is reduced to the first space. 9. The method of forming an air curtain according to claim 8 , wherein the pressure is set to be higher than the pressure of the first space and the second space is opened. When the first space and the second space are opened, together with the dehumidifying air curtain , an air curtain for blowing air is formed on the second space side. air between the first space and the second space formed between the dehumidifying air curtain is sucked on the first space side to form a stagnation area with a part of the air flow of the dehumidifying air curtain 10. The method of forming an air curtain according to claim 8 or 9 , characterized by:

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