JP2020143849A - Air curtain device and air curtain formation method - Google Patents

Abstract

To provide an air curtain device which can reduce an amount of moisture entering into a low temperature/low humidity space and achieve downsizing and cost reduction of a dehumidifier, and to provide an air curtain formation method.SOLUTION: An air curtain device of the invention includes a first air curtain device (1) installed on at least the first space side. The first air curtain device has: a first air suction port (2); an air curtain device body (3) including a dehumidifier which dehumidifies air supplied from the first air supply port; and a first air outlet (4) which blows out the dehumidified air to form a dehumidified air curtain (5). The first air suction port is located close to the first air outlet and disposed closer to a second space than the first air outlet.SELECTED DRAWING: Figure 1

Description

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

For example, a cold storage warehouse includes a low temperature room such as a refrigerating room and a front room such as a cargo handling room on the carry-in / exit side. When the article is carried from the front chamber to the low temperature chamber, heat and moisture invade from the front chamber to the low temperature chamber.

In response to the problem of heat and moisture invading, Patent Document 1 sends air adjusted to a required temperature and humidity to the anterior chamber. As a result, when the door between the refrigerating chamber and the anterior chamber is opened, the air in the refrigerating chamber is suppressed from flowing into the anterior chamber, and a sudden drop in temperature of the anterior chamber is prevented.

Further, Patent Document 2 describes an air curtain structure for preventing the occurrence of dew condensation due to the intrusion of warm air into a low temperature warehouse. Further, in Patent Document 3, a refrigerating room air curtain device is provided inside the refrigerating room, and a refrigerating room outdoor air curtain device is provided outside the refrigerating room. A dehumidifying device is provided on the outside of the refrigerating room, and the dehumidifying device dehumidifies the air sucked by the air curtain device outside the refrigerating room. As a result, dehumidified air can be blown down in the vicinity of the loading / unloading door, and it is possible to prevent high-humidity outside air from entering the inside of the refrigerator compartment.

Japanese Unexamined Patent Publication No. 2006-349221 JP-A-2002-303477 Japanese Unexamined Patent Publication No. 2017-166725

However, the ability of the air conditioner for adjusting the anterior chamber to a required temperature and humidity as shown in Patent Document 1 depends on the volume and shape of the anterior chamber. Therefore, in the configuration of Patent Document 1, an optimum air conditioner is required each time depending on the volume and shape of the anterior chamber, which is poor in versatility and high in cost. Further, in Patent Document 2, it is necessary to provide a large-scale dehumidifying chamber, and the entire device becomes large. Further, in Patent Document 3, a dehumidifier is installed outside the refrigerator outdoor air curtain device to suck and dehumidify the outside air of high temperature and high humidity. Therefore, in order to increase the dehumidification amount and the dehumidification rate, a large dehumidifier is used. Must be used.

The present invention has been made in view of such circumstances, and is an air curtain device capable of suppressing the amount of water invading into a low-temperature and low-humidity space, and reducing the size and cost of the dehumidifier. , And, an object of the present invention is 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 opened in a state where the first space and the second space having a lower temperature and lower humidity than the first space are opened. An air curtain device that forms an air curtain so as to block the air curtain, and includes a first air curtain device installed at least on the first space side. The first air curtain device includes a first air suction port and the above. It has an air curtain device main body including a dehumidifier that dehumidifies the air supplied from the first air suction port, and a first air outlet that blows out the dehumidified air to form a dehumidifying air curtain. The air suction port is close to the first air outlet and is arranged closer to the second space than the first air outlet.

In the air curtain forming method of one aspect of the present invention, the first space and the second space are opened in a state where the first space and the second space having a lower temperature and lower humidity than the first space are opened. It is an air curtain forming method of forming an air curtain so as to block the air curtain, and forms a dehumidifying air curtain by dehumidifying the sucked air and then blowing it out on the first space side, and at the same time, the air flow of the dehumidifying air curtain. It is characterized in that a part of the air flows to the second space side and sucks air so as to form a stagnant area.

According to the present invention, at least a dehumidifying air curtain that blocks between the first space and the second space can be formed, and the amount of moisture invading into the second space of low temperature and low humidity can be suppressed.

Then, according to the present invention, the first air suction port is brought close to the first air outlet so that a part of the air flow of the dehumidifying air curtain flows to the second space side to form a retention area, and the first air is blown out. It was placed closer to the second space than the air outlet. As a result, the air sucked by the first air suction port becomes lower in humidity than the air in the first space, and the amount of dehumidification can be reduced. Therefore, it is possible to reduce the size and cost of the dehumidifier.

It is a conceptual diagram of the air curtain device which concerns on 1st Embodiment of this invention. It is a psychrometric chart when the air curtain device which concerns on embodiment of this invention is used. It is a conceptual diagram which shows the structure of the inside of the air curtain device main body of the 1st air curtain device which concerns on embodiment of this invention. It is a conceptual diagram which shows the modification of the 1st air curtain apparatus which concerns on embodiment of this invention. It is a conceptual diagram which shows the modification of the 1st air curtain apparatus which concerns on embodiment of this invention. It is a conceptual diagram of the air curtain device which concerns on 2nd Embodiment of this invention. It is a graph for demonstrating the effect of suppressing the inflow of air into a low greenhouse. It is a conceptual diagram of the air curtain device which concerns on 3rd Embodiment of this invention.

Hereinafter, one embodiment of the present invention (hereinafter, abbreviated as “embodiment”) will be described in detail. The present invention is not limited to the following embodiments, and can be variously modified and implemented within the scope of the gist thereof.

<First Embodiment>
FIG. 1 is a conceptual diagram of an air curtain device according to a first embodiment of the present invention. In the following, the structure of the air curtain device and the method of forming the air curtain will be described. In FIG. 1, it has an anterior chamber 30 as a first space and a low temperature chamber 40 as a second space having a lower temperature and lower humidity than the anterior chamber 30. The anterior chamber 30 is, for example, a refrigerating chamber, and the low temperature chamber 40 is, for example, a freezing chamber.

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. The door, but not limited to, is, for example, an insulated door. FIG. 1 shows a state in which the door is opened to open the space between the front chamber 30 and the low temperature chamber 40. Further, the floor surfaces 30a and 40a of the front chamber 30 and the low temperature chamber 40 are formed by continuous surfaces.

The upper frame 50 that partitions the front chamber 30 and the low temperature chamber 40 extends vertically downward from the ceiling, for example. The extension line 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 a 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 is fixed to the ceiling portion on the front chamber 30 side near the boundary between the front chamber 30 and the low temperature chamber 40. You can also.

Further, 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 portion on the low temperature chamber 40 side near the boundary between the front chamber 30 and the low temperature chamber 40. it can.

In the first embodiment shown in FIG. 1, the first air curtain device 1 and the second air curtain device 20 are combined to form 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. It includes a first air outlet 4 that blows out dehumidified air to form a dehumidified air curtain 5.

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

On the other hand, the second air curtain device 20 includes an air suction port 21 for sucking low-temperature and 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 40a of the low temperature chamber 40. As a result, 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 the dehumidifier.

As described above, in the first embodiment, both the dehumidifying air curtain 5 and the air curtain 23 for blowing air are configured 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 open), the hot and humid air in the front chamber 30 flows into the low temperature chamber 40 more than the low temperature chamber 40. Can be suppressed. This moisture intrusion suppressing effect and heat intrusion suppressing effect are exhibited regardless of the size and shape of the low temperature chamber 40. In particular, as shown in FIG. 1, the dehumidifying air curtain 5 can form a retention region R1 and an intermediate region R2 of dehumidified air, which will be described later, and more effectively suppress the amount of water and the amount of heat flowing into the low temperature chamber 40. be able to.

Here, a system for dehumidifying the high-humidity air flowing into the low-temperature chamber 40 in the low-temperature chamber 40 has also been developed, but in that case, a large duct installation work is required, which results in a high installation cost and a large occupied space. There is a problem that it is needed.

On the other hand, in the present embodiment, since the air curtain is formed by using only the indoor air, additional work such as a duct is not required, and the air curtain device of the present embodiment can be inexpensive. Moreover, it can be installed in a short period of time.

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

Further, as shown in FIG. 1, due to the formation of the dehumidifying air curtain 5 and the air curtain 23 for blowing air, an intermediate region (retention region) R2 of the air curtain in which the air flow circulates between the air curtains 5 and 23 is formed. It is formed. The air in the intermediate region R2 has a temperature and humidity in which the dehumidifying air curtain 5 and the air blown out by the air curtain 23 for blowing air are mixed. Therefore, the temperature of the air in the intermediate region R2 is relatively lower than the high temperature and high humidity air in the anterior chamber 30, and higher than the low temperature and low humidity air in the low temperature chamber 40. Further, the absolute humidity of the air in the intermediate region R2 (the amount of water contained in the air) is lower than the high temperature and high humidity air in the front chamber 30 and higher than the low temperature and 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 air flow F1 of the dehumidifying air curtain 5, and the first air suction port of the first air curtain device 1 located in the vicinity of the intermediate region R2. It is sucked by 2.

As a result, the first air curtain device 1 sucks only high-temperature and high-humidity air in the anterior chamber 30 and dehumidifies it to form a dehumidified air curtain (hereinafter referred to as a comparative example). The absolute humidity (moisture content) contained in the air sucked by the air suction port 2 can be reduced. The difference in the amount of dehumidification between the present embodiment and the comparative example will be described with reference to the psychrometric chart of FIG. The amount of dehumidification in the comparative example in which the high temperature and high humidity air in the anterior chamber 30 (the anterior chamber air in FIG. 2) is sucked, dehumidified and blown out as compared with the low greenhouse 40 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, the amount of dehumidification when the air in the intermediate region R2 (intermediate air in FIG. 2) is sucked, dehumidified and blown out is the amount of dehumidification of the intermediate air and the blown air in FIG. It is indicated by the difference A2 in absolute humidity.

Therefore, in the present embodiment, the amount of dehumidification by the dehumidifier can be reduced by the amount of dehumidification A3 (= A1-A2) as compared with the comparative example. As described above, in the present embodiment, the amount of dehumidification required for the dehumidifier can be reduced, and the dehumidifier can be made smaller and less costly. Further, since the amount of dehumidification can be reduced, the dehumidifying air curtain 5 can be formed by rapid dehumidification. Therefore, the dehumidifying speed can be increased and the dehumidifying 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 as in the second air curtain device 20, and the first air curtain device 1 can be miniaturized. It does not reduce the storage space in the anterior chamber 30.

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

As described above, the second air suction port 6 is not arranged at a position where dehumidified air can be sucked, and 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 arranged on the side portion 3c of the air curtain device main body 3 or. It may be arranged in the lower portion 3a as long as it is away from the first air outlet 4. 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 on the upper portion 3b of the air curtain device main body 3, it can be arranged on the side portion 3c or the like. is there. Further, 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 the 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 the dehumidified air is not sucked, and the air is sucked together with the first air suction port 2 to reduce the amount of dehumidified air sucked from the first air suction port 2. Can be done. As a result, among 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, and the amount of air sucked into the first air outlet 4 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 view of the inside of the air curtain device main body constituting 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 unit) 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. The 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, or in the middle of the third flow path 10c, or both.

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

These airs are mixed by the three-way valve 7, but the mixing ratio is adjusted in advance, and the intermediate air and the anterior chamber air are mixed by the three-way valve 7 according to the mixing ratio. In the present embodiment, the mixing ratio is not limited, but the ratio of the anterior chamber air is made higher than the ratio of the intermediate air. As a result, 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 amount of dehumidification is smaller than that of A3 in FIG. 2, but the amount of dehumidification can be reduced as compared with the case where only the anterior 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 appropriately formed.

As shown in FIG. 1, when dehumidifying air is blown out from the first air outlet 4 of the first air curtain device 1 to form the dehumidifying air curtain 5, the dehumidifying air curtain 5 flows closer to the low temperature chamber 40. The airflow F1 that circulates to form the retention region R1 and the airflow F2 that flows along the floor surface 30a in the direction away from the low temperature chamber 40 after reaching the floor surface 30a.

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

As shown in FIG. 4, the outer protruding flow path portion 12 including the outer outlet 4b is inclined obliquely so that the outer outlet 4b is formed so as to be inclined toward the front chamber 30 side (outside). Further, in FIG. 4, the inner air outlet 4a faces directly downward, but the first air suction port 2 has a protruding flow path portion 11 having the first air suction port 2 so as to face the inside on the low temperature chamber 40 side. Tilt diagonally. As a result, the two airflows F1 and F2 are not affected by each other, and these airflows F1 and F2 can be branched more effectively. That is, by directing the first air suction port 2 toward the low temperature chamber 40 side, the amount of dehumidified air blown out from the inner outlet 4a is drawn into the first air suction port 2 on the way to the floor surface 30a. Can be reduced. As a result, it is easy to form an air flow F1 that reaches the floor surface 30a between the inner air outlet 4a and the first air suction port 2. Further, by directing the outer outlet 4b to the outside, dehumidified air is blown out from the outer outlet 4b in an oblique direction toward the outside (direction away from the low temperature chamber). As a result, after reaching the floor surface 30a, it is easy to form an air flow F2 that flows along the floor surface 30a in a direction away from the low temperature chamber 40.

In the present embodiment, the inclination angles of the protruding flow path portions 11 and 12 are not limited, but the intended use, the size of the first air curtain device 1, and the distance from the first air curtain device 1 to the floor surface 30a. Etc., it can be appropriately selected.

The configuration of the outlets 4a and 4b shown in FIG. 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 anterior chamber 30. Therefore, in order to appropriately branch the airflows F3 and F4, the outlet can be divided into two as in FIG. At this time, the air outlet on the side forming the air flow F4 can be inclined obliquely so as to face the outside.

Further, as shown in FIG. 5, the heights of the first air suction port 2 and the first air outlet 4 can be changed. In FIG. 5, the protruding flow path portion 14 having the first air outlet 4 is projected downward from the protruding flow path portion 13 having the first air suction port 2, and the first air suction port 2 is the first. 1 It can be provided at a position higher than the air outlet 4. As a result, among the dehumidified air blown out from the first air outlet 4, the dehumidified air (air flow F5) sucked into the first air suction port 2 can be reduced without reaching the floor surface 30a. 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 make the heights of the first air suction port 2 and the first air outlet 4 different, the protruding amounts of the protruding flow path portions 13 and 14 may be changed, or the first air may be changed. 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 first embodiment described above, the first air curtain device 1 installed in the front chamber 30 and the second air curtain device 20 installed in the low temperature chamber 40 are combined to form an "air curtain device". However, as shown in FIG. 6, it may be composed of only 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 the high temperature and high humidity air can be suppressed from flowing into the low temperature chamber 40. In particular, as shown in FIG. 6, the dehumidifying air curtain 5 can form a retention region R1 for dehumidified air, and more effectively, the amount of water and the amount of heat flowing into the low temperature chamber 40 can be suppressed.

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 on which the dehumidifying air curtain 5 is formed, and the first air is provided in the same manner as the first air outlet 4. It was arranged inside the low temperature chamber 40 closer to the air outlet 4. As a result, the air sucked by the first air suction port 2 is compared with 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 to form the dehumidified air curtain. Absolute humidity (moisture content) contained in can be reduced. Therefore, the dehumidifier can be made smaller and less costly. Further, the dehumidifying air curtain 5 can be formed by rapid dehumidification. Therefore, the dehumidifying speed can be increased and the dehumidifying efficiency can be improved. Further, unlike the configuration of FIG. 1, since the first air curtain device 1 is used alone, the device cost can be reduced.

Here, as shown in FIG. 1, a configuration in which a first air curtain device 1 capable of forming a dehumidifying air curtain 5 and a second air curtain device 20 capable of forming an air curtain 23 for blowing air are arranged (hereinafter, "" The effect of suppressing water intrusion from the anterior chamber 30 to the low temperature chamber 40 by using a configuration (referred to as "twin AC") and a configuration in which only the first air curtain device 1 is arranged (referred to as "single AC"). , A simulation was performed.

In the simulation experiment, the anterior chamber 30 is set to a condition of higher temperature and higher humidity than the low temperature chamber 40. First, in the state where the anterior chamber 30 and the low temperature chamber 40 are opened, the twin AC and the single AC are not used and an air curtain is not formed. The case was set to "none", and the amount of water flowing into the low temperature chamber 40 from the anterior chamber 30 was measured.

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

Next, when the twin AC and the single AC are used with the front chamber 30 and the low temperature chamber 40 open, and the dehumidifying function of the first air curtain device 1 is used to form an air curtain, " As "AC + dehumidification", the amount of water flowing from the anterior chamber 30 into the low temperature chamber was measured. In this case, the twin AC forms the dehumidifying air curtain + the air curtain for blowing air, and the single AC forms the dehumidifying air curtain.

In the "none" simulation experiment, the amount of water invading from the anterior chamber 30 into the low temperature chamber 40 was set to 1, and the ratio of the amount of water invading "door AC" and "AC + dehumidification" was determined based on this. The results of the simulation experiment are shown in FIG.

As shown in FIG. 7, the amount of water entering from the front chamber 30 into the low temperature chamber 40 is reduced in both "door AC" and "AC + dehumidification" as compared with the simulation result of "none" that does not form an air curtain. I was able to do it. In particular, it was found that the amount of water invading from the anterior chamber 30 into the low temperature chamber 40 can be further reduced by setting "AC + dehumidification". 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".

Further, it was found that the amount of water invading from the anterior chamber 30 into the low temperature chamber 40 can be reduced more effectively by using the "twin AC" as compared with the "single AC".

As a result, the configuration of the air curtain device of FIG. 1, which is “AC + dehumidifying” and “twin AC”, is most excellent in reducing the amount of water intrusion, and then “AC + dehumidifying” and “single AC”, FIG. It was found that the configuration of the air curtain device of the above is excellent in reducing the amount of water 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 as in FIG. 6, but in the first air curtain device 1, dehumidified air is cooled at a low temperature. A second air outlet 15 for blowing into the chamber 40 is provided.

As shown in FIG. 8, with the door (for example, a heat insulating door) 51 between the front chamber 30 and the low temperature chamber 40 closed, the second air outlet 15 of the first air curtain device 1 enters the low temperature chamber 40. , Blow in dehumidified air A. As a result, the pressure in the low temperature chamber 40 can be made higher than the pressure in the anterior 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 positively pressured. As a result, when the dehumidifying air curtain is formed by the first air curtain device 1 in a state where the door 51 is opened and the front chamber 30 and the low temperature chamber 40 are opened, the pressure of the low temperature chamber 40 is higher than that of the front chamber 30. It is in a high state. Therefore, it is possible to more effectively suppress the air in the anterior chamber 30 from flowing into the low temperature chamber 40.

In the present embodiment, the air curtain may be continuously formed regardless of the opening and closing of the door 51, or is not formed when the door 51 is closed, but is controlled so as to be 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 immediately before opening the door 51. Further, in the embodiment shown in FIG. 8, when the air curtain is not formed when the door 51 is closed, all the air dehumidified by the dehumidifier can be blown into the low temperature chamber 40 from the second air outlet 15. it can.

The configuration in which the low temperature chamber 40 shown in FIG. 8 is positively pressured 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, it is possible to provide a detection unit that detects the approach of the object to be detected such as a person or an object, and to control the operation of the air curtain device as the object to be detected approaches. The type of detection unit is not limited, but for example, it is a motion sensor or a motion sensor using infrared rays. Further, although the installation location of the detection unit is not limited, it is preferable to install the detection unit in the vicinity of the door 51 because it is preferable to fully operate the air curtain device immediately before the door 51 opens.

When the air curtain device is continuously operated regardless of the opening and closing of the door 51, the output and the air volume of the air curtain device are suppressed when the door 51 is closed. Then, when the detection unit detects the object to be detected, the first air curtain device 1 can switch to the rapid dehumidifying operation and the second air curtain device 20 can switch to the rapid blowing operation immediately before the door 51 is opened. .. As a result, the power consumption of the air curtain device can be suppressed.

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

Further, in the above embodiment, the front chamber 30 is the first space and the low temperature chamber 40 is the second space, but here, the "space" is not only a closed space or a semi-closed space, but also an open space. It is a concept including. Therefore, for example, the low temperature and low humidity second space may be the showcase, and the high temperature and high humidity first space may be the space outside the showcase. In the present embodiment, the first space and the second space are not limited, and an air curtain that blocks the first space and the second space in order to prevent the air in the first space from flowing into the second space. It can be applied to all configurations that form.

Further, in each of the above-described embodiments, the first air curtain device 1 is installed near the ceiling of the front chamber 30, and the dehumidifying air curtain 5 is formed from the ceiling side toward the floor surface. 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, but for example, the present implementation is also performed in a configuration in which the air curtain is formed in the left-right direction orthogonal to the downward direction. The form of can be applied. In this case, the orientation and installation location 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 by the air curtain from the left and right directions.

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

Moreover, the embodiment of the present invention is not limited to each of the above-described embodiments, and may be variously modified, replaced, or modified 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 by the advancement of the technology or another technology derived from the technology, the method may be used. Therefore, the scope of claims covers all embodiments that may be included within the scope of the technical idea of the present invention.

1: 1st air curtain device 2: 1st air suction port 3: Air curtain device main body 4: 1st air outlet 4a: Inner outlet 4b: Outer outlet 5: Dehumidifying air curtain 6: 2nd air suction port 7 : Three-way valve 8: Dehumidifier 9: Blower fan 11-14: Protruding flow path 15: Second air outlet 20: Second air curtain device 21: Air suction port 22: Air outlet 23: Air curtain 30: Front Rooms 30a, 40a: Floor surface 40: Low temperature room 50: Upper frame 51: Doors F1 to F5: Airflow R1: Retention area R2: Intermediate area

Claims (12)

An air curtain that forms an air curtain so as to block the first space and the second space in a state where the first space and the second space having a lower temperature and lower humidity than the first space are opened. It ’s a device,
It is 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 that dehumidifies the air supplied from the first air suction port, and a dehumidifying air curtain that blows out dehumidified air. It has a first air outlet to be formed,
An air curtain device characterized in that the first air suction port is close to the first air outlet and is arranged closer to the second space than the first air outlet. The air curtain device according to claim 1, further comprising a second air suction port for sucking air in the first space. The air curtain device according to claim 2, wherein the air curtain device main body includes a first air suction port and a mixing unit for adjusting the mixing ratio of each air sucked from the second air suction port. .. The air curtain device according to any one of claims 1 to 3, further comprising a second air outlet for blowing air dehumidified by the dehumidifier into the second space. The first to fourth aspects of the present invention further include a detection unit that detects the approach of the object to be detected, and controls the operation of the first air curtain device in accordance with the approach of the object to be detected. The air curtain device according to any one. The air curtain device according to any one of claims 1 to 5, wherein the first air suction port is formed so as to be inclined so as to face the second space side. The first air outlet is configured to be separated into an outer outlet and an inner outlet.
The air curtain device according to any one of claims 1 to 6, wherein the outer air outlet is formed so as to be inclined toward the first space side. The first air suction port and the first air outlet are both arranged side by side on the same surface of the air curtain device main body, and the first air outlet is formed so as to protrude from the first air suction port. The air curtain device according to any one of claims 1 to 7, wherein the air curtain device is made. The air curtain device according to any one of claims 1 to 8, further comprising a second air curtain device that forms an air curtain on the second space side. An air curtain that forms an air curtain so as to block the first space and the second space in a state where the first space and the second space having a lower temperature and lower humidity than the first space are opened. It ’s a forming method,
On the first space side, the sucked air is dehumidified and then blown out to form a dehumidifying air curtain, and at the same time, a part of the air flow of the dehumidifying air curtain flows to the second space side to form a stagnation area. An air curtain forming method characterized by sucking air. In a state where the space between the first space and the second space is closed, the air dehumidified on the first space side is blown into the second space side, and the pressure in the second space is applied to the first space. The air curtain forming method according to claim 10, wherein the pressure is made higher than the pressure of the above, and then an opening is made between the first space and the second space. In a state where the space between the first space and the second space is opened, an air curtain is formed on the second space side together with the dehumidifying air curtain, and the dehumidifying air curtain and the air curtain for blowing air are combined. A claim characterized in that the air between the first space and the second space formed between them is sucked on the first space side to form a stagnation area with a part of the air flow of the dehumidifying air curtain. Item 10. The method for forming an air curtain according to claim 11.

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