Air supply unit, air conditioning system, and air conditioning method

Abstract

To provide a technology that can be used by switching cooling and heating.SOLUTION: An air supply unit is provided at a lower part of a side surface facing an air-conditioning space and includes: a cover member for forming an internal space, and including a blowout port for causing the internal space to communicate with an air-conditioning space; and a switching member for opening / closing the lower part of the internal space, and for switching a communication state of the internal space and the air-conditioning state. The switching member is configured to close the lower part of the internal space during a cooling operation, and open the lower part of the internal space during a heating operation. The blowout port maintains an open state without being closed during the heating operation.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air supply unit, an air conditioning system, and an air conditioning method.

Background Art

[0002] From the perspective of preventing heat stroke and the like, the introduction of air conditioning systems into gymnasiums has been promoted. In conventional air conditioning systems, the mixing ventilation method has been common, but recently, due to high air conditioning efficiency and little influence on sports such as badminton, there has been an increasing need to introduce a displacement ventilation type air conditioning system (hereinafter referred to as "displacement air conditioning system").

[0003] As an example of a displacement air conditioning system, a technique for efficiently cooling by providing a sock duct in a work area away from the side wall in a production factory and blowing a low-speed air flow from the sock duct is described (for example, see Patent Document 1).

[0004] As an example of a displacement air conditioning system, a technique for replacing indoor air with fresh air by providing an air diffuser, which is a housing having a semi-cylindrical diffuser surface, in the lower space inside an office building and causing fresh air to flow out from the air diffuser is described (for example, see Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, Patent Documents 1 and 2 do not describe switching between cooling and heating for use.

[0007] This invention has been made in view of the above problems, and aims to provide a technology that allows switching between cooling and heating. [Means for solving the problem]

[0008] To achieve the above objective, one embodiment of the air supply unit according to the present invention is an air supply unit provided at the lower part of a side surface facing an air-conditioned space, comprising: a cover member that forms an internal space and includes an air outlet that connects the internal space to the air-conditioned space; and a switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, wherein the switching member is configured to close the lower part of the internal space during cooling operation and open the lower part of the internal space during heating operation, and the air outlet remains open without being blocked during heating operation. According to this embodiment, it is possible to switch between cooling and heating. Furthermore, according to this embodiment, efficient airflow shapes can be easily formed during cooling operation and heating operation, respectively. Furthermore, according to this embodiment, during heating operation, air is blown from the lower end of the internal space into the air-conditioned space, and this air spreads far along the floor of the air-conditioned space due to the Coanda effect. As a result, the entire living area located at the lower part of the air-conditioned space can be efficiently heated.

[0009] Furthermore, in another embodiment of the air supply unit according to the present invention, the air outlets are arranged in a plurality and distributed from the floor surface of the air-conditioned space to the height of the object to be air-conditioned, and the area of ​​the opening at the bottom of the internal space is the same as or larger than the total opening area of ​​the plurality of air outlets. According to this embodiment, since the dynamic pressure acting on the lower end of the internal space is released directly into the air-conditioned space, the amount of air blown out from the lower end of the internal space into the air-conditioned space is the same as or larger than the total amount of air blown out from all the air outlets into the air-conditioned space, making it easier to form an airflow along the floor of the air-conditioned space.

[0010] Furthermore, in another embodiment of the air supply unit according to the present invention, the amount of air blown out from the lower part of the internal space into the air-conditioned space is equal to or greater than the total amount of air blown out from the plurality of outlets into the air-conditioned space. According to this embodiment, an airflow along the floor of the air-conditioned space is easily formed.

[0011] Furthermore, in another embodiment of the air supply unit according to the present invention, the cover member is formed from a sheet-like flexible material. According to this embodiment, the air supply unit can absorb the impact when a person or object collides with it.

[0012] Furthermore, in another embodiment of the air supply unit according to the present invention, the cover member is transparent. According to this embodiment, safety is improved because the inside of the air supply unit can be inspected with the cover member attached.

[0013] Furthermore, in another embodiment of the air supply unit according to the present invention, the cross-sectional area of ​​the internal space decreases toward the bottom. According to this embodiment, the dynamic pressure in the lower part of the internal space increases. As a result, the flow velocity of the air blown from the lower end of the internal space into the air-conditioned space can be increased.

[0014] Furthermore, in another embodiment of the air supply unit according to the present invention, a cushioning member is further fixed to the side surface, and the left and right ends of the cover member are attached to the cushioning member. According to this embodiment, the air supply unit is more likely to absorb the impact when a person or object collides with it.

[0015] Furthermore, in another embodiment of the air supply unit according to the present invention, the unit further comprises a holding portion provided at a position higher than the height of a person, the holding portion being made of a rigid material, and the cover member is attached to the holding portion. According to this embodiment, the shape of the air outlet sheet is easily determined. In addition, according to this embodiment, human contact with the holding portion is suppressed, and safety is improved.

[0016] Furthermore, one embodiment of the air conditioning system according to the present invention comprises an air conditioner, an air supply unit provided at the lower part of the side facing the air-conditioned space, and an air supply duct that sends air from the air conditioner to the air supply unit, wherein the air supply unit has a cover member that forms an internal space and includes an outlet that connects the internal space to the air-conditioned space, and a switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, wherein the switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation, and the outlet remains open without being blocked during heating operation. According to this embodiment, cooling and heating can be switched and used. Furthermore, according to this embodiment, efficient airflow shapes can be easily formed during cooling operation and heating operation, respectively. Furthermore, according to this embodiment, during heating operation, air is blown from the lower end of the internal space into the air-conditioned space, and this air spreads far along the floor of the air-conditioned space due to the Coanda effect. As a result, the entire living area located in the lower part of the air-conditioned space can be efficiently heated.

[0017] Furthermore, one embodiment of the air conditioning method according to the present invention is an air conditioning method using an air supply unit provided at the lower part of a side surface facing an air-conditioned space, wherein the air supply unit includes a cover member that forms an internal space and includes an outlet that connects the internal space and the air-conditioned space, and a switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, wherein the lower end of the internal space is closed by the switching member during cooling operation, and the lower end of the internal space is opened by the switching member with the outlet open without blocking it during heating operation. According to this embodiment, it is possible to switch between cooling and heating. Furthermore, according to this embodiment, efficient airflow shapes can be easily formed during cooling operation and heating operation, respectively. Furthermore, according to this embodiment, during heating operation, air is blown out from the lower end of the internal space into the air-conditioned space, and this air spreads far along the floor of the air-conditioned space due to the Coanda effect. As a result, the entire living area located at the lower part of the air-conditioned space can be efficiently heated. [Effects of the Invention]

[0018] According to one aspect of the present invention, cooling and heating can be switched and used.

Brief Description of the Drawings

[0019] [Figure 1] Cross-sectional view (1) showing the schematic configuration of the air supply unit according to the embodiment [Figure 2] Cross-sectional view (2) showing the schematic configuration of the air supply unit according to the embodiment [Figure 3] Perspective view showing the air supply unit according to the first example of the embodiment [Figure 4] Side view showing the air supply unit according to the first example of the embodiment [Figure 5] Cross-sectional view showing the air supply unit according to the first example of the embodiment [Figure 6] Perspective view showing an example of the holding part [Figure 7] View showing an example of the blowing sheet [Figure 8] View showing an example of the buffer member [Figure 9] View for explaining the state of the air supply unit according to the first example of the embodiment during cooling operation [Figure 10] View for explaining the state of the air supply unit according to the first example of the embodiment during heating operation [Figure 11] Side view showing the air supply unit according to the second example of the embodiment [Figure 12] Cross-sectional view showing the air supply unit according to the second example of the embodiment [Figure 13] Perspective view showing the air supply unit according to the third example of the embodiment [Figure 14] Side view showing the air supply unit according to the third example of the embodiment [Figure 15] Perspective view showing the air supply unit according to the fourth example of the embodiment [Figure 16] Side view showing the air supply unit according to the fourth example of the embodiment [Figure 17] Plan view showing an example of an air conditioning system including the air supply unit according to the embodiment [Figure 18] Cross-sectional view showing an example of an air conditioning system including the air supply unit according to the embodiment [Figure 19] A cross-sectional view showing another example of an air conditioning system including an air supply unit according to the embodiment. [Figure 20] A perspective view showing another example of an air conditioning system including an air supply unit according to the embodiment. [Figure 21] A perspective view showing another example of an air conditioning system including an air supply unit according to the embodiment. [Modes for carrying out the invention]

[0020] Hereinafter, non-limiting exemplary embodiments of the present invention will be described with reference to the attached drawings. In all attached drawings, the same or corresponding members or components are denoted by the same or corresponding reference numerals, and redundant descriptions are omitted.

[0021] <Air supply unit> The air supply unit 1 according to an embodiment will be described with reference to Figures 1 and 2. Figures 1 and 2 are cross-sectional views showing the schematic configuration of the air supply unit 1.

[0022] The air supply unit 1 is installed in the air-conditioned space P. The air-conditioned space P is, for example, a gymnasium, office, computer room, guest room, banquet hall, amusement area, printing room, hospital room, toilet, kitchen, machine room, boiler room, factory, etc., and is partitioned by the floor P1, side walls P2 and ceiling (not shown). The air supply unit 1 is installed at the lower part of the side surface of the air-conditioned space P. For example, the air supply unit 1 is installed at the lower part of the side wall P2 facing the air-conditioned space P. The air supply unit 1 is installed, for example, spaced apart from the floor P1. In this case, cleaning of the floor P1 becomes easier. The air supply unit 1 may also be installed on the floor P1, for example. The air supply unit 1 has a cover member 110, a switching member 120 and a holding part 130.

[0023] The cover member 110 forms an internal space A partitioned from the air-conditioned space P. The cover member 110 is made of, for example, a sheet-like flexible material. In this case, it can absorb the impact when a person or object collides with the air supply unit 1. The cover member 110 may also be made of, for example, a plate-shaped steel plate. The cover member 110 is, for example, transparent. In this case, safety is improved because the inside of the air supply unit 1 can be seen with the cover member 110 installed.

[0024] The cover member 110 is attached, for example, at its upper end to the holding portion 130. In this case, the shape of the cover member 110 is easily determined when the cover member 110 is formed from a sheet-like flexible material. The cover member 110 may also be attached, for example, at its upper end to the side wall P2. The cover member 110 may be attached, for example, at its left and right ends and its lower end to the side wall P2.

[0025] The cover member 110 includes a plurality of air outlets 110a. Each air outlet 110a connects the internal space A and the air-conditioned space P. Each air outlet 110a blows air from the internal space A horizontally into the air-conditioned space P. The plurality of air outlets 110a are arranged, for example, distributed over almost the entire surface of the cover member 110. When installed in the air-conditioned space P, the plurality of air outlets 110a are distributed throughout the area from the floor up to a predetermined height, for example, the height of the living area, i.e., the height of the area to be air-conditioned (for example, 2m).

[0026] The cover member 110 is provided such that, for example, the cross-sectional area of ​​the internal space A decreases towards the bottom. In this case, the total pressure, which is the sum of the dynamic pressure and static pressure of the air in the internal space A, is made uniform throughout the internal space A, and the airflow velocity from each outlet 110a can be made uniform. Furthermore, when the lower end of the internal space A is opened, the dynamic pressure acting on the lower end of the internal space A is released directly into the air-conditioned space P, so the flow velocity of the air blown from the lower end of the internal space A into the air-conditioned space P can be increased.

[0027] The switching member 120 opens and closes the lower part (e.g., the bottom end) of the internal space A, switching the communication state between the internal space A and the air-conditioned space P. The switching member 120 may be, for example, a hook-and-loop fastener, a wire fastener, a button, a magnet, or a combination thereof.

[0028] The switching member 120 closes the lower end of the internal space A, for example, during cooling operation. In this case, the internal space A and the air-conditioned space P are not in communication at the lower end of the internal space A. Therefore, as shown by the arrows in Figure 1, the air from the internal space A is blown out at a low speed towards the air-conditioned space P from the multiple outlets 110a. As a result, the entire living area located at the bottom of the air-conditioned space P can be efficiently cooled by displacement air conditioning.

[0029] The switching member 120 opens the lower end of the internal space A, for example, during heating operation. In this case, the internal space A and the air-conditioned space P are in communication at the lower end of the internal space A. Warm air is lighter and therefore tends to rise. For this reason, the air blown out from the outlet rises quickly, and areas far from the outlet are not easily heated. Therefore, by creating a state where the internal space A and the air-conditioned space P are in communication at the lower end of the internal space A, as shown by the arrows in Figure 2, air is blown from the lower end of the internal space A into the air-conditioned space P in addition to the multiple outlets 110a. The air blown out from the lower end of the internal space A into the air-conditioned space P spreads far along the floor P1 of the air-conditioned space P due to the Coanda effect. As a result, the entire living area located in the lower part of the air-conditioned space P can be efficiently heated. The wind speed during heating is preferably set to a wind speed that creates an airflow along the floor P1 of the air-conditioned space P due to the Coanda effect, for example, 1.5 m / s or more, for example, about 4 m / s. During heating operation, each outlet 110a remains open without being blocked. Therefore, heating operation (air blowing out from the lower end of the internal space A) is possible while each outlet 110a remains open without being blocked.

[0030] The opening area at the lower end of the internal space A is, for example, the same as or larger than the total opening area of ​​all the air outlets 110a. In this case, the dynamic pressure acting on the lower end of the internal space A is released directly into the air-conditioned space P. Therefore, the amount of air blown from the lower end of the internal space A into the air-conditioned space P is the same as or greater than the total amount of air blown from all the air outlets 110a into the air-conditioned space P. As a result, an airflow along the floor P1 of the air-conditioned space P is easily formed.

[0031] The retaining portion 130, together with the cover member 110, forms the internal space A. The retaining portion 130 is made of a hard material, such as a steel plate. The retaining portion 130 is attached to a side wall P2, for example. The retaining portion 130 is positioned higher than a person's height, for example. In this case, contact between a person and the retaining portion 130 is suppressed, improving safety.

[0032] As described above, according to the air supply unit 1 of this embodiment, the switching member 120 opens and closes the lower end of the internal space A, making it easy to form an efficient airflow shape during both cooling and heating operations. In other words, it can be used by switching between cooling and heating.

[0033] [Example 1] (Overall structure) Referring to Figures 3 to 5, the first embodiment of the air supply unit 1A will be described. Figure 3 is a view of the air supply unit 1A from the oblique side of the front. Figure 4 is a view of the air supply unit 1A from the side. Figure 5 is a cross-sectional view of the air supply unit 1A cut along the horizontal direction.

[0034] The air supply unit 1A includes a holding part 11, a blowing sheet 13, a cushioning member 14, a bottom sheet 15, and a connecting member 16.

[0035] The holding portion 11 corresponds to the aforementioned holding portion 130. The holding portion 11 is formed of, for example, a steel plate. The holding portion 11 is installed at a position higher than a person's height, for example. In this case, contact between a person and the holding portion 11 is suppressed, improving safety. In this embodiment, the height H1 from the floor P1 to the lower end of the holding portion 11 is 2m.

[0036] The air outlet sheet 13 corresponds to the cover member 110 mentioned above. Together with the holding portion 11, the air outlet sheet 13 forms an internal space A partitioned from the air-conditioned space P.

[0037] The discharge sheet 13 is attached to the front side of the supply air unit 1A and has a curved shape that is convex toward the air-conditioned space P. The discharge sheet 13 is attached, for example, to the holding part 11, the cushioning member 14 and the bottom sheet 15. In this case, the shape of the discharge sheet 13 is easily determined. The discharge sheet 13 is, for example, detachable. In this case, the discharge sheet 13 can be easily replaced if it is damaged, etc. When air is supplied to the inside of the discharge sheet 13, a predetermined pressure is applied to the entire inside and it expands. This can mitigate the impact when a person collides with it and can also equalize the airflow velocity from each outlet 13a.

[0038] The discharge sheet 13 is provided such that, for example, the cross-sectional area of ​​the internal space A decreases towards the bottom. In this case, the dynamic pressure below the internal space A increases. As a result, when the lower end of the internal space A is opened, the airflow velocity of the air blown from the lower end of the internal space A into the air-conditioned space P can be increased.

[0039] The discharge sheet 13 includes multiple air outlets 13a (see Figure 7). In Figures 3 and 4, the multiple air outlets 13a are not shown. The multiple air outlets 13a correspond to the multiple air outlets 110a mentioned above. Each air outlet 13a communicates with the air-conditioned space P and blows air taken in from the supply air duct 2 to the supply air unit 1A horizontally into the air-conditioned space P.

[0040] The cushioning member 14 is fixed to the side wall P2. The cushioning member 14 has a rectangular shape when viewed from the front. The cushioning member 14 has a sheet-like shape with a thickness of, for example, 40 mm to 60 mm. The presence of the cushioning member 14 makes it easier to absorb the impact when a person or object collides with the air supply unit 1A.

[0041] The bottom sheet 15 is formed from, for example, the same material as the blow-out sheet 13. The bottom sheet 15 is installed so as to close the opening formed near the floor P1 by the blow-out sheet 13 and the cushioning member 14. The bottom sheet 15 is, for example, transparent. In this case, safety is improved because the floor P1 can be seen with the bottom sheet 15 installed. The bottom sheet 15 is, for example, antistatic. In this case, it is less likely to become charged with static electricity, and the adhesion of dust and other particles to the bottom sheet 15 can be suppressed. The bottom sheet 15 is, for example, flame-retardant.

[0042] The connecting member 16 includes hook-and-loop fasteners 16a to 16d. Hook-and-loop fastener 16a detachably connects the holding part 11 to the upper end of the blowing sheet 13. Hook-and-loop fastener 16b corresponds to the switching member 120 described above. Hook-and-loop fastener 16b detachably connects the lower end of the blowing sheet 13 to the bottom sheet 15. Hook-and-loop fastener 16c detachably connects the left end of the blowing sheet 13 to the left side of the cushioning member 14. Hook-and-loop fastener 16d detachably connects the right end of the blowing sheet 13 to the right side of the cushioning member 14. The connecting member 16 may also include wire fasteners, buttons, or magnets instead of hook-and-loop fasteners 16a to 16d.

[0043] (holding part) An example of the holding part 11 will be described with reference to Figure 6. Figure 6(a) is a view of the holding part 11 from diagonally above the front, Figure 6(b) is a view of the holding part 11 from diagonally below the front, and Figure 6(c) is a view of the holding part 11 from diagonally above the rear.

[0044] The retaining part 11 is attached to the side wall P2 (see Figure 3). The retaining part 11 is closed at the top and open at the bottom. The retaining part 11 includes a front plate 11a, a back plate 11b, and a top plate 11c.

[0045] The front panel 11a has a rectangular shape, and both ends in the left-right direction are bent towards the rear and connected to the rear panel 11b.

[0046] The rear panel 11b has a rectangular shape and is connected to the front panel 11a at both ends in the left-right direction. The rear panel 11b is fixed to the side wall P2 (see Figure 3). The rear panel 11b is provided with a rear connection port 11d for connecting an air supply duct (not shown). The rear connection port 11d has a rectangular shape with a width greater than its height. However, the shape of the rear connection port 11d is not limited to this, and may be circular, elliptical, etc.

[0047] The ceiling panel 11c is provided to cover the upper opening formed by the front panel 11a and the back panel 11b. The ceiling panel 11c is provided with an upper connection port 11e for connecting the air supply duct 2 (Figure 3). The upper connection port 11e has an elliptical shape with a width greater than its depth. However, the shape of the upper connection port 11e is not limited to this, and may be circular, rectangular, for example.

[0048] As the holding portion 11 is provided with a rear connection port 11d and an upper connection port 11e, the air supply duct 2 can be attached to the air supply unit 1A regardless of whether the mounting position of the air supply duct 2 is on the rear or above the air supply unit 1A. The connection port on the side to which the air supply duct 2 cannot be attached may be closed. Furthermore, it is not necessary to provide either the rear connection port 11d or the upper connection port 11e.

[0049] Note that Figures 3 and 4 show the air supply unit 1A in a case where the air supply duct 2 is connected to the upper connection port 11e, and the air supply duct is not connected to the rear connection port 11d.

[0050] (Blow-out sheet) Referring to Figure 7, an example of the air outlet sheet 13 will be described. Figure 7 is a front view of the air outlet sheet 13 before installation.

[0051] The air outlet sheet 13 is used during both cooling and heating operations. The air outlet sheet 13 has a rectangular shape when viewed from the front and includes a plurality of air outlets 13a. The plurality of air outlets 13a are provided, for example, across the entire surface of the air outlet sheet 13. Each air outlet 13a has, for example, a circular shape. However, the shape of each air outlet 13a is not limited to this and may be, for example, rectangular or elliptical.

[0052] The discharge sheet 13 is formed from a flexible material. Examples of flexible materials include materials softer than the holding portion 11, such as soft PVC (polyvinyl chloride), tarpaulin, glass cloth sheets, vinyl sheets, shades, and anti-scattering nets. In this embodiment, the discharge sheet 13 is formed from a plasticized polyvinyl chloride mixture. In this case, it exhibits excellent flame retardancy, antistatic properties, and cold resistance.

[0053] The air outlet sheet 13 may, for example, be transparent. In this case, safety is improved because the inside of the air supply unit 1A can be checked with the air outlet sheet 13 installed. The air outlet sheet 13 may, for example, be antistatic. In this case, it is less likely to become charged with static electricity, and the adhesion of dust and other particles to the air outlet sheet 13 can be suppressed. The air outlet sheet 13 may, for example, be flame-retardant.

[0054] In this embodiment, the discharge sheet 13 has, for example, a height of 2000 mm, a width of 1000 mm, and a thickness of 1 mm. The discharge sheet 13 is provided with 167 circular air outlets 13a with a diameter of 3 mm, spaced at 12 mm intervals in the vertical direction and 150 circular air outlets 13a with a width spaced at 12 mm intervals. However, the shape, size, pitch, number, etc., of the air outlets 13a are not limited to these. For example, each air outlet 13a may be circular with a diameter of 1 mm to 10 mm. The opening ratio of the air outlets 13a is, for example, 1% to 10%, and one example is 5%.

[0055] (cushioning material) Referring to Figure 8, an example of the cushioning member 14 will be described. Figure 8 is a view of the cushioning member 14 from diagonally above.

[0056] The cushioning member 14 has a form in which a laminate 14a is covered with vinyl leather 14b. The laminate 14a includes plywood 14c, a chip urethane layer 14d, and urethane foam 14e. The thickness of the vinyl leather 14b may be, for example, 1 mm. The thickness of the plywood 14c may be, for example, 9 mm. The thickness of the chip urethane layer 14d may be, for example, 20 mm or more and 40 mm or less. The thickness of the urethane foam 14e may be, for example, 10 mm.

[0057] (Air conditioning method using an air supply unit) The air conditioning method using the air supply unit 1A will be explained with reference to Figures 9 and 10. Figure 9 is a diagram illustrating the state of the air supply unit 1A during cooling operation. Figure 10 is a diagram illustrating the state of the air supply unit 1A during heating operation.

[0058] The operation of the air supply unit 1A during cooling operation will now be explained. During cooling operation, as shown in Figure 9, the lower end of the discharge sheet 13 and the bottom sheet 15 are connected by hook-and-loop fasteners 16b, closing the lower end of the internal space A. As a result, the internal space A and the air-conditioned space P are not in communication at the lower end of the internal space A. Therefore, as indicated by the arrows in Figure 9, the air from the internal space A is blown out at a low speed toward the air-conditioned space P from multiple outlets 13a (see Figure 7) formed on the discharge sheet 13. As a result, the entire living area located below the air-conditioned space P can be efficiently cooled by displacement cooling.

[0059] The operation of the air supply unit 1A during heating operation will now be explained. During heating operation, as shown in Figure 10, the connection between the lower end of the discharge sheet 13 and the bottom sheet 15 by the hook-and-loop fastener 16b is released, opening the lower end of the internal space A. As a result, the internal space A and the air-conditioned space P are connected at the lower end of the internal space A. Therefore, as indicated by the arrows in Figure 10, in addition to the multiple air outlets 13a, air is blown from the lower end of the internal space A into the air-conditioned space P. The air blown from the lower end of the internal space A spreads far along the floor P1 of the air-conditioned space P due to the Coanda effect. As a result, the entire living area located in the lower part of the air-conditioned space P can be efficiently heated.

[0060] As described above, by switching the connection state between the lower end of the air outlet sheet 13 and the bottom sheet 15, and opening and closing the lower end of the internal space A, an efficient airflow shape can be easily formed during both cooling and heating operations. In other words, it can be used by switching between cooling and heating.

[0061] [Example 2] Referring to Figures 11 and 12, a second embodiment of the air supply unit 1B will be described. Figure 11 is a side view of the air supply unit 1B. Figure 12 is a cross-sectional view of the air supply unit 1B taken along the horizontal direction.

[0062] The air supply unit 1B differs from the air supply unit 1A in that the air outlet sheet 13 is attached to the back sheet 17. The following explanation will focus on the differences from the air supply unit 1A.

[0063] The air supply unit 1B includes a holding part 11, a blowing sheet 13, a bottom sheet 15, a connecting member 16, a back sheet 17, and a support part 18.

[0064] The back sheet 17 is formed from the same material as, for example, the blowing sheet 13. The back sheet 17 is attached planarly along the side wall P2. The back sheet 17 is, for example, transparent. In this case, safety is improved because the side wall P2 can be seen with the back sheet 17 attached. The back sheet 17 is, for example, antistatic. In this case, it is less likely to accumulate static electricity, and the adhesion of dust and other particles to the back sheet 17 can be suppressed. The back sheet 17 is, for example, flame retardant. The left and right ends of the back sheet 17 are bent towards the front by the support parts 18. The left end of the back sheet 17 is detachably connected to the left end of the blowing sheet 13 by a hook-and-loop fastener 16c. The right end of the back sheet 17 is detachably connected to the right end of the blowing sheet 13 by a hook-and-loop fastener 16d.

[0065] The support section 18 includes a left reinforcing member 18a and a right reinforcing member 18b. The left reinforcing member 18a and the right reinforcing member 18b are flat plates formed, for example, from steel plates. The left reinforcing member 18a extends downward from the lower left end of the holding section 11. The right reinforcing member 18b extends downward from the lower right end of the holding section 11. The vertical lengths of the left reinforcing member 18a and the right reinforcing member 18b are the same as, or approximately the same as, the vertical length of, for example, the blowing sheet 13. The left reinforcing member 18a and the right reinforcing member 18b are fixed to the side wall P2 with the back sheet 17 sandwiched between them.

[0066] In the air supply unit 1B, as with the air supply unit 1A, the connection state between the lower end of the discharge sheet 13 and the bottom sheet 15 can be switched, and by opening and closing the lower end of the internal space A, an efficient airflow shape can be easily formed during both cooling and heating operations. In other words, it can be used by switching between cooling and heating.

[0067] [Example 3] Referring to Figures 13 and 14, a third embodiment of the air supply unit 1C will be described. Figure 13 is a view of the air supply unit 1C from the oblique side of the front. Figure 14 is a view of the air supply unit 1C from the side.

[0068] The air supply unit 1C differs from the air supply unit 1A in that the discharge sheet 13 is attached to the support part 12. The following explanation will focus on the differences from the air supply unit 1A.

[0069] The air supply unit 1C includes a holding part 11, a support part 12, a blowing sheet 13, a bottom sheet 15, a connecting member 16, and a back sheet 17.

[0070] The support portion 12 is formed of, for example, a steel plate. The support portion 12 is provided below the holding portion 11. Together with the holding portion 11, the support portion 12 supports the blowing sheet 13, the bottom sheet 15, and the back sheet 17. The support portion 12 includes reinforcing members 12a to 12d. The reinforcing members 12a to 12d fix the back sheet 17 to the side wall P2. The reinforcing members 12a to 12d are, for example, L-shaped angles. The bottom sheet 15 is detachably attached to the reinforcing member 12b. The blowing sheet 13 is detachably attached to the reinforcing members 12c and 12d.

[0071] The discharge sheet 13 is provided such that, for example, the cross-sectional area of ​​the internal space A is equal at the top and bottom. Alternatively, the discharge sheet 13 may be provided such that, for example, the cross-sectional area of ​​the internal space A decreases towards the bottom.

[0072] The connecting member 16 includes hook-and-loop fasteners 16a to 16d. Hook-and-loop fastener 16a detachably connects the holding part 11 to the upper end of the blowing sheet 13. Hook-and-loop fastener 16b detachably connects the bottom sheet 15 to the lower end of the blowing sheet 13. Hook-and-loop fastener 16c detachably connects the reinforcing material 12c to the left end of the blowing sheet 13. Hook-and-loop fastener 16d detachably connects the reinforcing material 12d to the right end of the blowing sheet 13.

[0073] In the air supply unit 1C, as with the air supply unit 1A, the connection state between the lower end of the discharge sheet 13 and the bottom sheet 15 can be switched, and by opening and closing the lower end of the internal space A, an efficient airflow shape can be easily formed during both cooling and heating operations. In other words, it can be used by switching between cooling and heating.

[0074] [Example 4] Referring to Figures 15 and 16, a fourth embodiment of the air supply unit 1D will be described. Figure 15 is a view of the air supply unit 1D from the oblique side of the front. Figure 16 is a view of the air supply unit 1D from the side.

[0075] The air supply unit 1D differs from the air supply unit 1A in that it has a holding portion 21 that includes a ceiling plate 21c that slopes downward from the rear side to the front side. The following explanation will focus on the differences from the air supply unit 1A.

[0076] The air supply unit 1D includes a holding portion 21, a blowing sheet 13, a cushioning member 14, a bottom sheet 15, and a connecting member 16.

[0077] The retaining part 21 is attached to the side wall P2. The retaining part 21 is closed at the top and open at the bottom. The retaining part 21 includes a front plate 21a, a back plate 21b, a top plate 21c, and perforated metal 21f.

[0078] The front panel 21a is bent at both ends in the left-right direction toward the rear and connected to the rear panel 21b. The front panel 21a has a curved shape. In this case, safety is improved in the event of a collision with a person or object on the front panel 21a.

[0079] The rear panel 21b has a rectangular shape and is connected to the front panel 21a at both ends in the left-right direction. The rear panel 21b is fixed to the side wall P2. The rear panel 21b is provided with a rear connection port 21d for connecting an air supply duct (not shown). The rear connection port 21d has a rectangular shape with a width greater than its height. However, the shape of the rear connection port 21d is not limited to this, and may be circular, elliptical, etc.

[0080] The ceiling panel 21c is installed to close the upper opening formed by the front panel 21a and the rear panel 21b. The ceiling panel 21c is inclined downward from the rear side towards the front side.

[0081] The perforated metal 21f is provided to cover the opening at the lower end of the holding portion 21, that is, the lower opening formed by the front plate 21a and the back plate 21b. The perforated metal 21f is optional.

[0082] Thus, the holding section 21 is provided with a rear connection port 21d and a ceiling plate 21c that slopes downward from the rear side toward the front side. In this case, the air supplied by the air supply duct 2 is taken into the air supply unit 1D from the rear connection port 21d and then collides with the ceiling plate 21c, causing it to flow downward. Therefore, it is easy to efficiently supply air into the internal space A.

[0083] <Air conditioning system> An air conditioning system according to an embodiment will now be described. The air conditioning system according to this embodiment is a displacement ventilation type air conditioning system (hereinafter referred to as the "displacement air conditioning system"). In the displacement air conditioning system, air slightly cooler than the room temperature is supplied to the lower part of the air-conditioned space (for example, the living area) at a slow supply air velocity (generally 0.2 m / s or less), and the rising airflow generated when this air is heated by heat-generating elements present in the air-conditioned space transports pollutants such as dust and gases generated in the air-conditioned space to the upper part of the air-conditioned space. Then, the pollutants are exhausted along with the heated air from exhaust vents provided in the ceiling or elsewhere, thereby ventilating the air-conditioned space.

[0084] [Air conditioning system for gymnasiums] Referring to Figures 17 and 18, an air conditioning system for a gymnasium will be described as an example of an air conditioning system equipped with an air supply unit 1A. Figure 17 is a view from above of the interior of a gymnasium Q in which an air conditioning system including an air supply unit 1A has been installed. Figure 18 is a cross-sectional view of a gymnasium Q in which an air conditioning system including an air supply unit 1A according to this embodiment has been installed.

[0085] Gymnasium Q is an example of an air-conditioned space P, and is partitioned by the floor Q1, side walls Q2, and ceiling Q3. A walkway Q4 is provided on the side wall Q2 inside Gymnasium Q. A basketball hoop BG, for example, is installed on the walkway Q4. An exhaust vent Q5 is provided at the top of the side wall Q2, for example, at approximately the same height as the walkway Q4.

[0086] The air conditioning system is designed to maintain optimal air quality, including temperature, humidity, airflow, and air purity, within the gymnasium Q. The air conditioning system comprises an air supply unit 1A, an air supply duct 2, an exhaust duct 3, and an air conditioner 4.

[0087] The air supply unit 1A is installed at the bottom of the side wall Q2 inside the gymnasium Q. The air supply unit 1A blows out the supply air SA (Supply Air) taken in from the air supply duct 2 from the outlet 13a (see Figure 7) toward the living area inside the gymnasium Q. The air supply unit 1A is installed at two locations on one side wall Q2 and two locations on the other side wall Q2 in the longitudinal direction of the gymnasium Q. The air supply unit 1A installed on one side wall Q2 and the air supply unit 1A installed on the other side wall Q2 are arranged, for example, facing each other. However, the arrangement and number of air supply units 1A are not limited to this and will be determined according to the shape, size, window arrangement, etc., of the gymnasium Q.

[0088] The supply air duct 2 connects the supply air unit 1A and the air conditioner 4. This allows the supply air SA (Supply Air) produced by the air conditioner 4 to be supplied to the supply air unit 1A through the supply air duct 2. In this embodiment, the supply air duct 2 is connected to the rear connection port 11d (see Figure 6) of the supply air unit 1A. This allows air to flow horizontally into the supply air unit 1A, causing the incoming air to collide with the front panel 11a (see Figure 6), diffuse, and flow towards the lower discharge sheet 13 (see Figure 3). As a result, the airflow within the supply air unit 1A is made uniform, allowing air to be evenly discharged from multiple outlets 13a (see Figure 7). The supply air duct 2 may also be provided with a damper 5 for adjusting the airflow rate.

[0089] The exhaust duct 3 connects the exhaust port Q5 to the air conditioner 4. This allows the return air (RA) from the exhaust port Q5 to be introduced into the air conditioner 4 through the exhaust duct 3. The exhaust duct 3 may also be equipped with a damper 6 to adjust the airflow.

[0090] The air conditioner 4 is installed, for example, outside the gymnasium Q. The air conditioner 4 includes a filter, cooling coil, heating coil, humidifier, etc., and takes in outside air OA from outside the gymnasium Q and return air RA from inside the gymnasium Q to produce supply air SA. However, the air conditioner 4 may produce supply air SA by taking in only outside air OA, or by taking in only return air RA. The supply air SA is high-temperature air during heating operation and low-temperature air during cooling operation. High-temperature air means air that is hotter than the air accumulated in the living area inside the gymnasium Q, and low-temperature air means air that is colder than the air accumulated in the living area inside the gymnasium Q.

[0091] In this air conditioning system, outside air OA and return air RA are taken into the air conditioner 4 to create supply air SA, which is supplied to the supply air unit 1A. The supply air SA is then blown out from the outlet 13a (see Figure 7) of the discharge sheet 13 attached to the supply air unit 1A toward the living area inside the gymnasium Q.

[0092] The above description of the air conditioning system explains the case where an exhaust vent Q5 is formed in the side wall Q2 of the gymnasium Q, but it is not limited to this. For example, an exhaust vent Q5 may not be provided.

[0093] Furthermore, although the above description of the air conditioning system has shown the air conditioner 4 being installed outside the gymnasium Q, it is not limited to this configuration. For example, as shown in Figure 19, the air conditioner 4 may be installed inside the gymnasium Q. In the example in Figure 19, a partition wall Q6 is provided inside the gymnasium Q with a gap between it and the side wall Q2, and the air conditioner 4 is installed between the side wall Q2 and the partition wall Q6. In the example in Figure 19, the air supply unit 1D is directly attached to the air conditioner 4. Figure 19 is a cross-sectional view of the gymnasium Q in which the air conditioning system including the air supply unit 1D according to this embodiment has been installed.

[0094] [Air conditioning system for evacuation shelter buildings] Referring to Figure 20, we will describe an air conditioning system for a shelter building as another example of an air conditioning system equipped with an air supply unit 1A. Figure 20 is a perspective view from diagonally above of the interior of an example of a shelter building R in which an air conditioning system including an air supply unit 1A has been installed.

[0095] Evacuation shelter building R is an example of an air-conditioned space P, and is an existing gymnasium, public hall, or similar building that is designated as an evacuation facility for a certain period during a disaster, enabling the evacuation of a relatively large number of evacuees.

[0096] Inside the shelter building R, floor space (not shown) will be provided for healthy evacuees, and multiple shelter tents 70 (six in the illustrated example) will be installed to accommodate patients with infectious diseases, etc. Furthermore, an air conditioning system will be installed in the shelter building R.

[0097] Each shelter tent 70 is connected to its own outdoor branch air duct 83, each outdoor branch air duct 83 is connected to a common main air duct 82, and the main air duct 82 is connected to an outdoor air supply fan 81, thereby forming a shelter tent unit 90. In this way, the shelter building R is a building in which an existing gymnasium or the like is used as an evacuation facility, and the shelter tent units 90 are installed inside.

[0098] In the illustrated example, a transformer 84 (here, a step-up transformer) is electrically connected to the outdoor air supply fan 81, and the voltage boosted by the transformer 84, for example from 100V to 200V, is applied to the outdoor air supply fan 81. The outdoor air supply fan 81 in the illustrated example has two air supply systems, and one end of a main air duct 82 unique to each air supply system is attached to it.

[0099] Three outdoor branch air ducts 83 branch off from each main air duct 82, and one end of the corresponding outdoor branch air duct 83 is attached to a chamber 31 located above the ceiling of the three shelter tents 70.

[0100] Air supplied from the outdoor air supply fan 81 flows through two main air ducts 82 in the Z1 direction, and through each outdoor branch air duct 83 in the Z2 direction to be supplied to the chamber 31, and then supplied to the interior of the shelter tent 70 via the chamber 31. The chamber 31 has a filter, and filtered air is supplied to the interior of the shelter tent 70. The chamber 31 also has an internal fan (not shown). The internal fan has an air supply assist function that supplies air supplied to the chamber 31 in the Z2 direction by the outdoor air supply fan 81 to the interior of the shelter tent 70. The internal fan also has an exhaust function that exhausts the air inside the shelter tent 70 to the outside. The air supply assist function and the exhaust function can be switched by operating, for example, a switch button (not shown) on the chamber 31. Furthermore, the number of shelter tents 70 installed in the shelter building R may be other than those shown in the illustration, and a single main air duct 82 may extend from the outdoor air supply fan 81, with multiple outdoor branch air ducts 83 branching from the single main air duct 82.

[0101] The outdoor air supply fan 81 preferably has a heating and cooling function that generates both cool and warm air as supply air, similar to a normal air conditioner, and can switch between cool or warm air at the desired temperature depending on the temperature and humidity inside the shelter building R, such as the season and time of day. The outdoor air supply fan 81 may also have an outdoor unit built inside to dissipate the heat generated, for example, when generating cool air.

[0102] The outdoor air supply fan 81 incorporates a control unit (not shown). The control unit includes a CPU (Central Processing Unit), NVRAM (Non-Volatile RAM), RAM (Random Access Memory), ROM (Read Only Memory), and HDD (Hard Disk Drive), etc. (none of which are shown). Each part of the control unit is connected via a bus to enable data transmission and reception. The ROM stores various programs and data used by those programs. The RAM is used as a storage area for loading programs and as a work area for loaded programs. The CPU implements various functions by processing the programs loaded into the RAM. The HDD stores programs and various data used by those programs. The NVRAM stores various setting information.

[0103] For example, the system may be configured to generate air at a suitable temperature for air supply based on measurement information from temperature sensors, humidity sensors (neither of which are shown), and supply that air to each shelter tent 70.

[0104] Furthermore, an electrical cable reel 85 is electrically connected to the transformer 84, and electrical wiring 86 extending from the electrical cable reel 85 is extended into the interior of each shelter tent 70, with outlets attached to the end of the electrical wiring 86 being installed in the interior.

[0105] Furthermore, an opening (not shown) is formed in the ceiling of the shelter tent 70, and a rectangular closure sheet 19 is attached to close the opening. Different materials are used for the closure sheet 19 depending on its function. Specifically, when supplying air flowing in the Z2 direction via the outdoor branch air duct 83 to the interior of the shelter tent 70 through the chamber 31, or when neither supplying nor exhausting air, a closure sheet made of a light-transmitting transparent or translucent resin sheet is used. On the other hand, when exhausting air from the interior of the shelter tent 70 through the chamber 31, a breathable closure sheet is used. By taking in outside air through a breathable closure sheet, the excessive negative pressure atmosphere inside the room during exhaust can be eliminated. Examples of breathable closure sheets include nonwoven fabrics.

[0106] The air conditioning system is designed to maintain optimal air quality, including temperature, humidity, airflow, and air purity, within the shelter building R. The air conditioning system includes an air supply unit 1A, air supply ducts, exhaust ducts, and air conditioners.

[0107] The air supply unit 1A is installed at the bottom of the side wall R2 inside the shelter building R. The air supply unit 1A blows the air supply SA taken in from the air supply duct out of the outlet 13a (see Figure 7) toward the living area inside the shelter building R. In the example in Figure 20, one air supply unit 1A is provided in the shelter building R, but the number of air supply units 1A is not limited to this, and there may be two or more, for example.

[0108] The supply air duct, exhaust duct, and air conditioner may have the same configuration as the supply air duct 2, exhaust duct 3, and air conditioner 4 in the air conditioning system installed in Gymnasium Q as described above.

[0109] In this air conditioning system, outside air OA and return air RA are taken into the air conditioner to create supply air SA, which is supplied to the supply air unit 1A. The supply air SA is then blown out from the outlet 13a (see Figure 7) of the discharge sheet 13 attached to the supply air unit 1A toward the living area inside the shelter building R.

[0110] In the example shown in Figure 20, air supplied from the outdoor air supply fan 81 flows through the main air duct 82 and the outdoor branch air duct 83 to the chamber 31, and then supplied to the interior of the shelter tent 70 via the chamber 31. However, the system is not limited to this configuration. For example, as shown in Figure 21, the outdoor air supply fan 81, main air duct 82, outdoor branch air duct 83, transformer 84, electrical cable reel 85, and electrical wiring 86 do not necessarily need to be provided. In the example shown in Figure 21, the air inside the shelter building R, which has been conditioned by the aforementioned air conditioning system, is supplied into the shelter tent 70 via the chamber 31.

[0111] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The above embodiments may be omitted, replaced, or modified in various ways without departing from the scope and spirit of the appended claims. [Explanation of symbols]

[0112] 1,1A,1B,1C,1D Air supply unit 2. Air supply duct 3. Exhaust duct 4 Air conditioner 5 Damper 6 Damper 11 Holding part 11a Front plate 11b Back plate 11c ceiling board 11d Rear connection port 11e Upper connection port 12 Support part 12a~12d Reinforcement material 13. Blowing sheet 13a Air outlet 14. Cushioning material 14a Laminate 14b Vinyl Leather 14c plywood 14d chip urethane layer 14e urethane foam 15 Bottom sheet 16 Connecting member 16a~16d Velcro fasteners 17. Rear seat 18 Support part 18a Left reinforcement 18b Right reinforcement 19. Blockage sheet 21 Holding part 21a Front plate 21b Back plate 21c ceiling board 21d Rear connection port 21f Perforated Metal 31 Chambers 70 tents for evacuation shelters 81 Outdoor air intake fan 82 Main air duct 83 Outdoor branch air duct 84 Transformers 85 Electric cable reel 86 Electrical Wiring 90 Tent Units for Evacuation Shelters 110 Cover component 110a Air outlet 120 Switching member 130 Holding part A Interior space P Air conditioned space P1 floor P2 side wall Q gymnasium Q1 floor Q2 side wall Q3 Ceiling Q4 Corridor Q5 Exhaust vent Q6 Partition Wall R Evacuation building R2 side wall OA outside air RA return air SA Air Intake

Claims

1. An air supply unit installed at the lower part of the side facing the air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation so that the internal space and the air-conditioned space communicate only at the air outlet, and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. Air supply unit.

2. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. Multiple air outlets are arranged and distributed within the range from the floor surface of the air-conditioned space to the height of the object to be air-conditioned. The area of ​​the opening at the bottom of the internal space is the same as, or larger than, the total opening area of ​​the multiple air outlets. Air supply unit.

3. The amount of air blown out from the lower part of the internal space into the air-conditioned space is equal to or greater than the total amount of air blown out from the multiple outlets into the air-conditioned space. The air supply unit according to claim 2.

4. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. The cover member is formed from a sheet-like flexible material. Air supply unit.

5. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. The cover member is transparent, Air supply unit.

6. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. The aforementioned internal space has a decreasing cross-sectional area towards the bottom. Air supply unit.

7. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. The device further includes a cushioning member fixed to the aforementioned side surface, The left and right ends of the cover member are attached to the cushioning member. Air supply unit.

8. An air supply unit provided at the lower part of a side surface facing an air-conditioned space, A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. The holding part is positioned higher than a person's height and further comprises a holding part made of a hard material. The cover member is attached to the holding portion, Air supply unit.

9. Air conditioner and An air supply unit is installed at the lower part of the side facing the air-conditioned space, A supply air duct that sends air from the air conditioner to the supply air unit, Equipped with, The aforementioned air supply unit is A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, The switching member is configured to close the lower part of the internal space during cooling operation so that the internal space and the air-conditioned space communicate only at the air outlet, and to open the lower part of the internal space during heating operation. The aforementioned air outlet remains open without being blocked during the heating operation. Air conditioning system.

10. An air conditioning method using an air supply unit installed at the lower part of the side facing the air-conditioned space, The aforementioned air supply unit is A cover member that forms an internal space and includes an air outlet that connects the internal space and the air-conditioned space, A switching member that opens and closes the lower part of the internal space and switches the state of communication between the internal space and the air-conditioned space, It has, During cooling operation, the lower end of the internal space is closed by the switching member so that the internal space and the air-conditioned space are in communication only at the air outlet, and during heating operation, the lower end of the internal space is opened by the switching member while the air outlet is open without being blocked. Air conditioning method.

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