Ventilation system

Abstract

To provide a ventilation system which can improve a temperature and humidity environment in a shop while reducing an initial cost.SOLUTION: A ventilation system 100 for ventilating a shop 2 having a selling space 3, a backyard 4, and an air removal chamber 5, includes: a first air supply device 14 which mechanically supplies outdoor air into the selling space 3 via a first air outlet 12; a second air supply device 24 which sucks air in the selling space 3 via a second air inlet 21 provided at a position closer to a freezer / refrigerator show case 3a than the first air outlet 12 and mechanically supplies the air sucked via the second air inlet 21 into the backyard 4; a third air supply device 34 which mechanically supplies the air in the selling space 3 into the air removal chamber 5; and a control device 60 which controls operations of the first air supply device 14, the second air supply device 24, and the third air supply device 34. The control device 60 controls operations of the first air supply device 14, the second air supply device 24, and the third air supply device 34 for a predefined period of time at an air volume where the backyard 4 and the air removal chamber 5 are at a positive pressure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technology for a ventilation system for ventilating a store. [Background technology]

[0002] Conventionally, technology for a ventilation system for ventilating a store has been publicly known, as described in Patent Document 1, for example.

[0003] In stores such as supermarkets and drugstores, it is necessary to maintain an appropriate temperature and humidity environment within the store (building) from the perspective of preserving merchandise and preventing condensation and mold growth. Meanwhile, as a ventilation method for stores, a ventilation design using Type 3 ventilation (natural intake and mechanical exhaust) is sometimes used, as described in Patent Document 1, for example. However, Type 3 ventilation creates a negative pressure inside the store, which makes it easy for outside air to enter, and this creates a problem in that the temperature and humidity environment of the store is easily affected by the outside air.

[0004] On the other hand, there is also a method in which the temperature and humidity of outside air is adjusted using an outdoor air conditioner before being supplied to the store. This method can effectively improve the temperature and humidity environment inside the store, but has the problem of high initial costs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-71010 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and the problem that it aims to solve is to provide a ventilation system that can improve the temperature and humidity environment within a store while reducing initial costs. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, there is provided a ventilation system for ventilating a store having a sales floor equipped with an air conditioning unit and showcases for displaying products in a cooled state, a back-of-house, and a windbreak room located between the entrance and exit of the building and the sales floor, the system comprising: a first air supply device that mechanically supplies outdoor air into the sales floor through a first air outlet; a second air supply device that draws in air from within the sales floor through an intake port located closer to the showcase than the first air outlet and mechanically supplies the air drawn in through the intake port to the back-of-house; a third air supply device that mechanically supplies air from within the sales floor to the windbreak room; and a control device that controls the operation of the first air supply device, the second air supply device, and the third air supply device, and the control device controls the operation of the first air supply device, the second air supply device, and the third air supply device at an air volume that will create positive pressure in the back-of-house and the windbreak room within a specified period of time.

[0009] In claim 2, the suction port is arranged at a position where the shortest distance to the showcase is within 1 m in plan view.

[0010] In claim 3, a second air outlet is provided for supplying air from the third air supply device to the windbreak chamber, and the second air outlet is formed in a slit shape.

[0011] In claim 4, the second air outlet is arranged at a position where the shortest distance to the entrance is within 1 m in plan view.

[0012] In claim 5, the specified time is the business hours of the store, and the control device operates the second air supply device at all times during the business hours of the store regardless of whether the air conditioning device is heating or cooling, stops the second air supply device outside the business hours of the store during the heating period of the air conditioning device, and operates the second air supply device outside the business hours of the store during the cooling period of the air conditioning device.

[0013] In claim 6, a fourth air supply device is provided that mechanically supplies air from within the sales floor to the ceiling.

[0014] In claim 7, the control device stops the fourth air supply device during a heating period by the air conditioner, and operates the fourth air supply device during a cooling period by the air conditioner.

[0015] In claim 8, the store is a supermarket or a drug store. [Effects of the Invention]

[0016] The present invention has the following effects.

[0017] In the invention according to claim 1, the temperature and humidity environment in the store can be improved while reducing initial costs.

[0018] In the invention according to claim 2, cooler air can be supplied to the backyard by the second air supply device.

[0019] In the invention according to claim 3, the wind speed of the air blown out from the second air outlet into the windbreak chamber can be increased, and thus the air blown out from the second air outlet into the windbreak chamber can function as an air curtain.

[0020] In the invention according to claim 4, it is possible to effectively prevent outside air from entering the windbreak chamber.

[0021] In the invention of claim 5, during the cooling season when the outside temperature is relatively high, the quality of the goods stored in the back yard can be protected by supplying relatively cool air from the sales floor to the back yard by the second air supply device even outside of business hours.

[0022] In the invention of claim 6, by supplying air from within the sales floor to the ceiling, the temperature and humidity environment in the ceiling can be improved, and ultimately condensation and mold formation in the ceiling can be suppressed.

[0023] In the invention of claim 7, the occurrence of condensation and mold in the ceiling can be suppressed by supplying air from inside the sales floor to the ceiling during the cooling season when condensation and mold are likely to occur in the ceiling.

[0024] In the invention according to claim 8, the temperature and humidity environment in a supermarket or drugstore can be improved. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a schematic plan view showing a store in which a ventilation system according to an embodiment of the present invention is installed. [Figure 2] 1A is a schematic cross-sectional front view of a store equipped with a ventilation system according to an embodiment of the present invention; FIG. 1B is a cross-sectional side view of a portion of the store where a vestibule is located; and FIG. 1C is a plan view of the ceiling of the vestibule. [Figure 3] 1 is a block diagram showing a ventilation system according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0026] A ventilation system 100 according to one embodiment of the present invention will be described below.

[0027] The ventilation system 100 is applied to a store 2 and ventilates the interior (internal space) of the store 2. The store 2 is, for example, a supermarket or a drugstore. FIGS. 1 and 2 show an example of the store 2. In this embodiment, the store 2 has a sales floor 3, a backyard 4, a vestibules 5, an office 6, and an attic 7. Note that in FIG. 1, for the sake of convenience in explaining each component of the ventilation system 100, components that are actually provided in the attic 7 may also be illustrated in the sales floor 3.

[0028] The sales floor 3 is provided with refrigerated and frozen showcases 3a for displaying products in a refrigerated state. In this embodiment, three refrigerated and frozen showcases 3a are provided. Two of the multiple refrigerated and frozen showcases 3a are provided along the leftmost wall of the sales floor 3 (the wall separating the sales floor 3 from the back yard 4). One of the multiple refrigerated and frozen showcases 3a is provided on the left side of the sales floor 3, along the rearmost wall of the sales floor 3 (the wall separating the sales floor 3 from the outdoors).

[0029] An air conditioner 3b is provided in the sales floor 3 to air-condition the sales floor 3. The air conditioner 3b is provided in an appropriate location in the sales floor 3. The air conditioner 3b is connected to an outdoor unit (not shown) and is capable of circulating a refrigerant between the air conditioner 3b and the outdoor unit. The air conditioner 3b can perform heating operation, cooling operation, dehumidification operation, etc., thereby adjusting the temperature and humidity environment of the sales floor 3. Although only one air conditioner 3b is shown in FIG. 1, an appropriate number of air conditioners 3b can be provided depending on the size of the sales floor 3.

[0030] The back yard 4 is located adjacent to the left side of the sales floor 3. The products displayed in the sales floor 3 are stored in the back yard 4. No air conditioning equipment is installed in the back yard 4. The vestibules 5 are located between the sales floor 3 and the entrance / exit 8 located at the front (right side) of the store 2. The office 6 is located adjacent to the left side of the vestibules 5. The attic 7 is located above the sales floor 3, the vestibules 5 and the office 6.

[0031] Store 2 configured in this manner is provided with a ventilation system 100 for ventilating store 2 and improving the temperature and humidity environment. Ventilation system 100 includes a first air supply section 10, a second air supply section 20, a third air supply section 30, a fourth air supply section 40, an exhaust section 50, and a control device 60.

[0032] The first air supply section 10 shown in Figures 1 and 2(a) forcibly supplies outdoor air into the sales area 3. In this embodiment, two first air supply sections 10 are provided. Each first air supply section 10 mainly comprises a first air inlet 11, a first air outlet 12, a first air supply duct 13, and a first air supply device 14.

[0033] The first air inlet 11 is provided so as to open into the right wall of the attic 7 (the wall separating the attic 7 from the outdoors).

[0034] The first air outlet 12 is provided so as to open onto the ceiling surface of the sales floor 3 (the portion separating the sales floor 3 from the attic 7). The first air outlet 12 is provided at a position relatively close to the wall at the right end of the sales floor 3 (at a position relatively far from the refrigerated and freezer showcase 3a).

[0035] First air supply duct 13 is formed to allow air to flow therethrough, and is provided to connect first air inlet 11 and first air outlet 12 to each other.

[0036] The first air supply device 14 is for supplying outdoor air into the sales floor 3, and is, for example, an air supply fan. The first air supply device 14 is provided between the first air inlet 11 and the first air outlet 12 (midway through the first air supply duct 13).

[0037] In addition, in FIG. 1, two first air supply sections 10 are provided, but an appropriate number of first air supply sections 10 can be provided in accordance with the size of the sales floor 3.

[0038] The first air supply section 10 configured in this manner can take in (suck in) outdoor air through the first intake port 11 when the first air supply device 14 is operating (operating), and mechanically supply the taken-in air into the sales area 3 through the first outlet port 12.

[0039] The second air supply section 20 shown in Figures 1 and 2(a) forcibly supplies air from within the sales floor 3 into the back of house 4. In this embodiment, two second air supply sections 20 are provided. Each second air supply section 20 mainly includes a second air inlet 21, a second air outlet 22, a second air supply duct 23, and a second air supply device 24.

[0040] The second air inlet 21 is provided so as to open onto the ceiling surface of the sales floor 3. The second air inlet 21 is provided on the left side of the sales floor 3, more specifically at a position closer to the refrigerated freezer showcase 3a than the first air outlet 12. Preferably, the second air inlet 21 is arranged at a position where the shortest distance L1 (see FIG. 1) from the center of the opening of the second air inlet 21 to the refrigerated freezer showcase 3a is within 1 m in plan view.

[0041] The second air outlet 22 is provided so as to open into the left wall of the sales floor 3 (the wall separating the sales floor 3 from the back yard 4).

[0042] Second air supply duct 23 is formed to allow air to flow therethrough, and is provided to connect second air inlet 21 and second air outlet 22 to each other.

[0043] Second air supply device 24 is for supplying air from within sales floor 3 into back yard 4, and is, for example, an air supply fan. Second air supply device 24 is provided between second air inlet 21 and second air outlet 22 (midway through second air supply duct 23).

[0044] In addition, in FIG. 1, two second air supply sections 20 are provided, but an appropriate number of second air supply sections 20 can be provided according to the size of the sales floor 3 and the back yard 4.

[0045] The second air supply section 20 configured in this manner can take in (suck in) air from within the sales area 3 through the second suction port 21 when the second air supply device 24 is operating, and mechanically supply the taken-in air into the back yard 4 through the second air outlet 22.

[0046] The third air supply section 30 shown in Figures 1 and 2(b) forcibly supplies air from within the sales area 3 into the windbreak room 5. In this embodiment, one third air supply section 30 is provided. The third air supply section 30 mainly includes a third air inlet 31, a third air outlet 32, a third air supply duct 33, and a third air supply device 34.

[0047] The third air inlet 31 is provided so as to open onto the ceiling surface of the sales floor 3. The third air inlet 31 is provided in a position relatively close to the wall separating the sales floor 3 from the vestibules 5. However, the placement of the third air inlet 31 is not limited to this.

[0048] The third air outlet 32 ​​is provided so as to open the ceiling of the windbreak room 5 (the portion separating the windbreak room 5 from the attic 7). The third air outlet 32 ​​is placed as close as possible to the entrance 8 of the store 2 (directly above the vicinity of the entrance 8). Preferably, the third air outlet 32 ​​is placed at a position where the shortest distance L2 (see FIG. 1) from the center of the opening of the third air outlet 32 ​​to the entrance 8 is within 1 m in a plan view.

[0049] 2(c), the third air outlet 32 ​​is preferably formed in the shape of a slit with its longitudinal direction facing the left-right direction. In this case, the opening area of ​​the third air outlet 32 ​​is set to be as small as possible so as to increase the wind speed of the air blown out from the third air outlet 32. A plurality of third air outlets 32 are provided, spaced apart in the left-right direction.

[0050] The third air supply duct 33 is formed to allow air to flow therethrough, and is provided to connect the third air inlet 31 and the third air outlet 32 ​​to each other.

[0051] The third air supply device 34 is for supplying air from within the sales floor 3 into the windbreak room 5, and is, for example, an air supply fan. The third air supply device 34 is provided between the third air inlet 31 and the third air outlet 32 ​​(midway through the third air supply duct 33).

[0052] The third air supply section 30 configured in this manner can take in (suck in) air from within the sales area 3 through the third suction port 31 when the third air supply device 34 is operated, and mechanically supply the taken-in air into the windbreak room 5 through the third outlet 32.

[0053] The fourth air supply section 40 shown in Figures 1 and 2(a) forcibly supplies air from within the sales floor 3 into the attic space 7. The fourth air supply section 40 mainly comprises a fourth suction port 41 and a fourth air supply device 44.

[0054] The fourth air inlet 41 is provided so as to open onto the ceiling surface of the sales floor 3. The fourth air inlet 41 is provided in a position relatively close to the wall separating the sales floor 3 from the back yard 4. However, the placement of the fourth air inlet 41 is not limited to this.

[0055] The fourth air supply device 44 is for supplying air from within the sales floor 3 into the attic space 7, and is, for example, an air supply fan. The fourth air supply device 44 is provided so as to communicate with the fourth air inlet 41.

[0056] The fourth air supply section 40 configured in this manner can take in (suck in) air from within the sales floor 3 through the fourth suction port 41 when the fourth air supply device 44 is operated, and mechanically supply the taken-in air into the attic 7.

[0057] The exhaust section 50 is a section that exhausts air inside the store 2 to the outside. The exhaust section 50 is equipped with a first exhaust port 51, a second exhaust port 52, a third exhaust port 53, and a fourth exhaust port .

[0058] The first exhaust vent 51 is provided so as to open into the right wall of the sales floor 3 (the wall separating the sales floor 3 from the outdoors). The opening area of ​​the first exhaust vent 51 is set to a size that allows for proper ventilation of the sales floor 3. The opening area of ​​the first exhaust vent 51 is also set to as small a value as possible so that the sales floor 3 can be maintained at a positive pressure (a pressure higher than the outside air).

[0059] The second exhaust port 52 is provided so as to open into the wall at the left end of the backyard 4 (the wall separating the backyard 4 from the outdoors). The opening area of ​​the second exhaust port 52 is set to a size that allows for proper ventilation of the backyard 4. In addition, the opening area of ​​the second exhaust port 52 is set to as small a value as possible so that the backyard 4 can be maintained at a positive pressure (a pressure higher than the outside air).

[0060] The third exhaust port 53 is provided so as to open into the right wall of the windbreak chamber 5 (the wall separating the windbreak chamber 5 from the outdoors). The opening area of ​​the third exhaust port 53 is set to a size that allows for proper ventilation of the windbreak chamber 5. The opening area of ​​the third exhaust port 53 is also set to as small a value as possible so that the windbreak chamber 5 can be maintained at a positive pressure (a pressure higher than the outside air).

[0061] The fourth exhaust vent 54 is provided so as to open into the right wall of the attic space 7 (the wall separating the attic space 7 from the outdoors). The opening area of ​​the fourth exhaust vent 54 is set to a size that allows for proper ventilation of the attic space 7. In addition, the opening area of ​​the fourth exhaust vent 54 is set to as small a value as possible so that the attic space 7 can be maintained at a positive pressure (a pressure higher than the outside air).

[0062] The control device 60 controls various operations of the ventilation system 100. The control device 60 is electrically connected to each of the first air supply device 14, the second air supply device 24, the third air supply device 34, and the fourth air supply device 44, and controls the operation of the first air supply device 14, the second air supply device 24, the third air supply device 34, and the fourth air supply device 44. The control device 60 is equipped with a memory unit such as a RAM, a ROM, a HDD, etc., and an arithmetic processing unit such as a CPU, etc.

[0063] In the ventilation system 100 configured in this manner, the control device 60 can ventilate the store 2 by forcibly supplying outdoor air to the store 2 through the first air supply section 10 and naturally exhausting the air in the store 2 to the outdoors through the exhaust section 50.

[0064] Next, a method for determining the ventilation air volumes of the first air supply device 14, the second air supply device 24, the third air supply device 34, and the fourth air supply device 44 will be described.

[0065] The ventilation air volume Q1 [m 3 / h] is set to 0.5 times / h for the air volume of the sales floor 3. That is, the ventilation air volume Q1 [m 3 / h] is calculated using the following formula 1.

[0066] Q1=V1×0.5...(Formula 1)

[0067] Here, V1 is the volume of sales floor 3 [m 3 ]. The value "0.5" indicates the number of ventilations required per hour [times / h].

[0068] Ventilation air volume Q2 [m 3 / h] is set so that the backyard 4 has a positive pressure of 5 [Pa] compared to the outside air (outdoor air). Specifically, the ventilation air volume Q2 [m 3 / h] is calculated using the following formula 2.

[0069] Q2=αA2×(2 / ρ×5) 0.5 ×3600...(Formula 2)

[0070] Here, "αA2" is the outer skin gap area of ​​the backyard 4 [m 2 ]. Also, "ρ" indicates the air density [kg / m 3 The outer skin gap area αA2 is calculated by multiplying the equivalent gap area (C value) of the backyard 4 by the floor area of ​​the backyard 4.

[0071] The ventilation air volume Q3 [m of the third air supply device 34 3 / h] is set so that the pressure in the windbreak chamber 5 is 5 [Pa] positive compared to the outside air. 3 / h] is calculated using the following equation 3.

[0072] Q3=αA3×(2 / ρ×5) 0.5 ×3600...(Formula 3)

[0073] Here, "αA3" is the outer skin gap area of ​​the windbreak chamber 5 [m 2 The outer skin gap area αA3 is calculated by multiplying the equivalent gap area (C value) of the windbreak chamber 5 by the floor area of ​​the windbreak chamber 5.

[0074] The ventilation air volume Q4 [m 3 / h] is set to an air volume that will not cause condensation on the refrigerant piping in the attic space 7 even if a certain amount of outside air enters the attic space 7. Specifically, the ventilation air volume Q4 [m 3 / h] is calculated using the following equation 4.

[0075] Q4=(DP0-DP c )×Q0 / (DP c -DP i )...(Formula 4)

[0076] Here, "DP0" indicates the dew point temperature [℃] of the outside air. c " indicates the target dew point temperature [℃] in the ceiling space 7. i " indicates the dew point temperature [℃] of the sales floor 3. Also, "Q0" indicates the amount of outside air infiltration [m 3 / h].

[0077] For example, if the outside dew point temperature DP0 is 27°C, the dew point temperature DP i is 15℃, and the target dew point temperature DP c If the temperature is 21°C and the outside air enters the attic space 7 at a rate of 0.2 times per hour, the amount of air required to be supplied to the attic space 7 will be equivalent to 0.2 times per hour relative to the air volume of the attic space 7.

[0078] In this way, by determining the ventilation air volume of the first air supply device 14, the second air supply device 24, the third air supply device 34, and the fourth air supply device 44, it is possible to ventilate the store 2 while maintaining a positive pressure in the store 2. By maintaining a positive pressure in the store 2, it is possible to prevent outside air from entering the store 2, which in turn improves the temperature and humidity environment within the store 2.

[0079] Specifically, by setting the ventilation air volume of the first air supply device 14 to the ventilation air volume Q1 calculated by the above formula 1, the sales floor 3 can be maintained at a positive pressure. Therefore, the first air supply unit 10 can ventilate the sales floor 3 while preventing outside air from entering the sales floor 3, thereby improving the temperature and humidity environment of the sales floor 3.

[0080] Furthermore, by setting the ventilation air volume of the second air supply device 24 to the ventilation air volume Q2 calculated by the above formula 2, it is possible to maintain a positive pressure in the backyard 4. Therefore, it is possible to ventilate the backyard 4 using the second air supply unit 20 while suppressing the intrusion of outside air into the backyard 4, thereby improving the temperature and humidity environment in the backyard 4.

[0081] In addition, by supplying relatively cold air near the refrigerated and frozen showcase 3a in the sales area 3 to the back yard 4 by the second air supply section 20 (second air supply device 24), the temperature and humidity environment in the back yard 4 can be improved without installing an air conditioning device in the back yard 4.

[0082] Furthermore, by setting the ventilation air volume of the third air supply device 34 to the ventilation air volume Q3 calculated by the above formula 3, it is possible to maintain a positive pressure in the windbreak chamber 5. Therefore, it is possible to ventilate the windbreak chamber 5 using the third air supply section 30 while suppressing the intrusion of outside air into the windbreak chamber 5, thereby improving the temperature and humidity environment of the windbreak chamber 5.

[0083] 2(c), by forming the third air outlet 32 ​​in the shape of a slit whose longitudinal direction is oriented in a direction (left-right direction) perpendicular to the direction (front-back direction) in which customers enter the store 2, and by setting the opening area of ​​the third air outlet 32 ​​to a small value that increases the wind speed of the air blown out from the third air outlet 32, the air blown out from the third air outlet 32 ​​into the windbreak chamber 5 can function as an air curtain. This makes it possible to effectively prevent outside air from entering the windbreak chamber 5.

[0084] Furthermore, by setting the ventilation air volume of the fourth air supply device 44 to the ventilation air volume Q4 calculated by the above formula 4, the attic space 7 can be maintained at a positive pressure. Therefore, the fourth air supply unit 40 can ventilate the attic space 7 while preventing outside air from entering the attic space 7, thereby improving the temperature and humidity environment in the attic space 7 and preventing condensation and mold from forming in the attic space 7.

[0085] Next, a method for controlling the first air supply device 14, the second air supply device 24, the third air supply device 34 and the fourth air supply device 44 will be described.

[0086] The control device 60 operates the first air supply device 14, the second air supply device 24, and the third air supply device 34 at all times during the business hours of the store 2, regardless of the cooling period (period during which the air conditioner 3b is in cooling operation) or the heating period (period during which the air conditioner 3b is in heating operation) by the air conditioner 3b. This promotes ventilation in the store 2 during business hours, while improving the temperature and humidity environment in the store 2.

[0087] On the other hand, outside of business hours of the store 2, the control device 60 reduces the airflow rate of the first air supply device 14 to 0.5 to 0.3 times / h (legal ventilation rate) regardless of whether the air conditioner 3b is cooling or heating. This improves energy conservation.

[0088] Furthermore, during the cooling season using air conditioner 3b, control device 60 operates second air supply device 24 outside of store 2's business hours to improve energy conservation. On the other hand, during the heating season using air conditioner 3b, control device 60 stops second air supply device 24 outside of store 2's business hours. In this way, during the cooling season when the outside temperature is relatively high, the second air supply unit 20 (second air supply device 24) supplies relatively cool air from within sales floor 3 to backyard 4 even outside of business hours, thereby protecting the quality of merchandise stored in backyard 4.

[0089] Furthermore, the control device 60 stops the third air supply device 34 outside of store 2 business hours, regardless of whether the air conditioner 3b is in the cooling or heating period. This improves energy conservation. Furthermore, since the door to the entrance / exit 8 is not opened or closed outside of store 2 business hours, the amount of outside air entering the windbreak room 5 is reduced. Therefore, stopping the third air supply device 34 does not have much impact on the temperature and humidity environment of the windbreak room 5.

[0090] Furthermore, during the heating period using air conditioner 3b, control device 60 stops fourth air supply device 44 to improve energy conservation, regardless of whether store 2 is open or closed. On the other hand, during the cooling period using air conditioner 3b, control device 60 operates fourth air supply device 44, regardless of whether store 2 is open or closed. In this way, by supplying air from within sales floor 3 to attic space 7 during the cooling period when condensation and mold are likely to occur in attic space 7, it is possible to suppress the occurrence of condensation and mold in attic space 7.

[0091] As described above, the ventilation system 100 according to this embodiment has the following features: A ventilation system 100 for ventilating a store 2 having a sales floor 3 in which an air conditioning device 3b is installed and a refrigerated / freezed showcase 3a (showcase) for displaying products in a cooled state is installed, a backyard 4, and a windbreak room 5 installed between an entrance / exit 8 of the building and the sales floor 3, a first air supply device 14 (first air supply unit 10) that mechanically supplies outdoor air into the sales area 3 through a first air outlet 12; a second air supply device 24 (second air supply unit 20) that sucks in air from within the sales floor 3 through a second suction port 21 (suction port) that is provided at a position closer to the refrigerated / freezed showcase 3a than the first air outlet 12, and mechanically supplies the air sucked through the second suction port 21 to the back yard 4; A third air supply device 34 (third air supply unit 30) that mechanically supplies air from within the sales floor 3 to the windbreak room 5; a control device (60) for controlling the operation of the first air supply device (14), the second air supply device (24), and the third air supply device (34); Equipped with The control device 60 During a specified time (for example, during the business hours of store 2), the operation of the first air supply device 14, the second air supply device 24 and the third air supply device 34 is controlled at an air volume that will create positive pressure in the back yard 4 and the windbreak room 5.

[0092] With this configuration, the temperature and humidity environment in the store 2 can be improved while reducing initial costs. Specifically, by supplying the air within the sales floor 3 to the back yard 4 and the windbreak room 5 and creating positive pressure in the back yard 4 and the windbreak room 5, it is possible to prevent outside air from entering the back yard 4 and the windbreak room 5, thereby improving the temperature and humidity environment in the back yard 4 and the windbreak room 5. In addition, by supplying relatively cold air near the refrigerated and frozen showcase 3a in the sales area 3 to the back yard 4 by the second air supply device 24, the temperature and humidity environment in the back yard 4 can be improved without installing an air conditioning device in the back yard 4.

[0093] The second air inlet 21 is disposed at a position where the shortest distance L1 to the refrigerated freezer showcase 3a is within 1 m in plan view.

[0094] With this configuration, cooler air can be supplied to the backyard by the second air supply device.

[0095] Moreover, the ventilation system 100 according to this embodiment has: a third air outlet 32 ​​(second air outlet) for supplying air from the third air supply device 34 to the windbreak chamber 5; The third air outlet 32 ​​is formed in a slit shape.

[0096] With this configuration, the wind speed of the air blown out from the third air outlet 32 ​​into the windbreak chamber 5 can be increased, and thus the air blown out from the third air outlet 32 ​​into the windbreak chamber 5 can act as an air curtain.

[0097] The third air outlet 32 ​​is disposed at a position where the shortest distance L2 to the entrance 8 is within 1 m in plan view. With this configuration, the intrusion of outside air into the windbreak chamber 5 can be effectively suppressed.

[0098] The predetermined time is the business hours of the store, The control device 60 The second air supply device 24 is operated at all times during the business hours of the store 2 regardless of the heating period or cooling period by the air conditioning device 3b, During the heating period using the air conditioning unit 3b, the second air supply unit 24 is stopped outside of the store's business hours, and during the cooling period using the air conditioning unit 3b, the second air supply unit 24 is operated outside of the store's business hours.

[0099] With this configuration, during the cooling season when the outside temperature is relatively high, the quality of the products stored in the back yard 4 can be protected by supplying relatively cool air from the sales floor 3 to the back yard 4 by the second air supply device 24 (second air supply section 20) even outside of business hours.

[0100] Moreover, the ventilation system 100 according to this embodiment has: The fourth air supply device 44 (fourth air supply section 40) is provided to mechanically supply air from within the sales floor 3 to the ceiling space 7.

[0101] With this configuration, air from within the sales floor 3 is supplied to the attic 7, thereby improving the temperature and humidity environment in the attic 7, and ultimately suppressing the formation of condensation and mold in the attic 7.

[0102] The control device 60 also The fourth air supply device 44 is stopped during the heating period by the air conditioner 3b, and is operated during the cooling period by the air conditioner 3b.

[0103] With this configuration, by supplying air from inside the sales floor 3 to the attic 7 during the cooling season when condensation and mold are likely to occur in the attic 7, it is possible to suppress the occurrence of condensation and mold in the attic 7.

[0104] The store 2 is a supermarket or a drug store.

[0105] This configuration can improve the temperature and humidity environment in a supermarket or drugstore.

[0106] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0107] For example, in this embodiment, the second air supply unit 20 mechanically supplies air from within the sales floor 3 to the back yard 4, but it may also mechanically supply air to the office 6, or a separate air supply unit may be provided to mechanically supply air to the office 6, separate from the second air supply unit 20.

[0108] Furthermore, the ventilation air volume Q2 of the second air supply device 24 and the ventilation air volume Q3 of the third air supply device 34 are not limited to the ventilation air volumes calculated by Equation 2 and Equation 3, respectively, but can be any ventilation air volume that can maintain positive pressure in the back yard 4 and the windbreak room 5.

[0109] In addition, in this embodiment, the specified time is the business hours of store 2 (during the business hours of store 2, the first air supply device 14, the second air supply device 24, and the third air supply device 34 are operated at an air volume that will create positive pressure in the back yard 4 and the windbreak room 5), but the specified time can be any time, and for example, it may be part of the business hours of store 2, or it may extend beyond the business hours of store 2.

[0110] In addition, in this embodiment, the third air outlet 32 ​​is formed in the shape of a slit with its longitudinal direction facing left and right, but the shape of the third air outlet 32 ​​is not limited to this and can be any shape that can form an air curtain. [Explanation of symbols]

[0111] 1. Ventilation system 2 stores 3 Sales Floor 3a Refrigerated and frozen showcase 3b Air conditioner 4 Backyard 5 Windbreak room 7 Attic 10 First air supply section 12 First outlet 14 First air supply device 20 Second air supply section 21 Second intake port 24 Second air supply device 30 Third air supply section 32 Third outlet 34 Third air supply device 40 Fourth air supply section 44 Fourth Air Supply Device

Claims

1. A ventilation system for ventilating a store having a sales floor where an air conditioning device is installed and a showcase for displaying products in a cooled state is installed, a backyard, and a windbreak room installed between the entrance and exit of the building and the sales floor, a first air supply device that mechanically supplies outdoor air into the sales floor through a first air outlet; a second air supply device that draws in air from within the sales floor through an intake port provided at a position closer to the showcase than the first air outlet, and mechanically supplies the air drawn in through the intake port to the back yard; a third air supply device that mechanically supplies air from within the sales floor to the windbreak room; a control device for controlling the operation of the first air supply device, the second air supply device, and the third air supply device; Equipped with The control device Within a predetermined time, the operation of the first air supply device, the second air supply device, and the third air supply device is controlled at an air volume that will result in positive pressure in the back yard and the windbreak room. Ventilation system.

2. The suction port is arranged at a position where the shortest distance to the showcase is within 1 m in a plan view. The ventilation system of claim 1 .

3. a second air outlet for supplying air from the third air supply device to the windbreak chamber; The second air outlet is formed in a slit shape. The ventilation system of claim 1 .

4. The second air outlet is arranged at a position where the shortest distance to the entrance / exit is within 1 m in a plan view.

4. The ventilation system of claim 3.

5. the predetermined time is the business hours of the store, The control device The second air supply device is operated at all times during the business hours of the store regardless of the heating period or the cooling period of the air conditioning device, The second air supply device is stopped outside the business hours of the store during a heating period using the air conditioner, and the second air supply device is operated outside the business hours of the store during a cooling period using the air conditioner. The ventilation system of claim 1 .

6. A fourth air supply device is provided that mechanically supplies air from the sales floor to the ceiling. The ventilation system of claim 1 .

7. The control device The fourth air supply device is stopped during a heating period by the air conditioner, and the fourth air supply device is operated during a cooling period by the air conditioner.

7. The ventilation system of claim 6.

8. The store is a supermarket or a drugstore. A ventilation system according to any one of claims 1 to 7.

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