Air-conditioning control room

Abstract

To provide an air-conditioning control room capable of improving ventilation efficiency.SOLUTION: The air-conditioning control room (3) sends out the heat-exchanged air-conditioned air to a plurality of rooms of a building, and ventilates the plurality of rooms. The air-conditioning control room (3) includes a room (41), a first fan (31), an air supply port (33) for taking in outside air of an outdoor space, a central air-conditioning unit (50) including a second fan (54), an air blowing port (70) for sending air that has passed through the central air-conditioning unit (50) to a plurality of rooms, an indoor air intake port (48) for taking in air of an indoor space, a room air intake port (49) provided above the central air-conditioning unit (50) for taking air of the room (41) into the central air-conditioning unit (50), and an exhaust port (35) for discharging air taken in from the indoor air intake port (48) to the outdoor space. The air volume of the second fan (54) is larger than that of the first fan (31).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an air conditioning control room, and more particularly to an air conditioning control room that sends heat-exchanged conditioned air to a plurality of rooms in a building and ventilates the plurality of rooms. [Background technology]

[0002] Conventionally, ventilation and air-conditioning systems that ventilate and air-condition the space inside a building have been known. One example of such technology is disclosed in Japanese Patent Laid-Open Publication No. 2017-150704 (Patent Document 1).

[0003] Patent Document 1 discloses a ventilation and air-conditioning system for ventilating and air-conditioning the space inside a building, which uses multiple partition plates to design an air path so that it can be installed compactly inside the building. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-150704 Summary of the Invention [Problem to be solved by the invention]

[0005] There are concerns about the ventilation efficiency of the ventilation air-conditioning system of Patent Document 1. For example, in the ventilation air-conditioning system of Patent Document 1, the air intake (RA) that draws air from the indoor space into the air conditioner and the outside air intake (SA) that sends outside air from the outdoor space into the chamber box are arranged opposite each other, so there is a risk that the outside air sent in from the outside air intake will leak from the air intake.

[0006] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air-conditioning controlled room that can improve ventilation efficiency. [Means for solving the problem]

[0007] An air conditioning control room according to one embodiment of the present invention is an air conditioning control room that sends heat-exchanged conditioned air to multiple rooms in a building and ventilates the multiple rooms, and is equipped with a room surrounded by multiple vertical walls of the building, a first blower that sends outside air from an outdoor space toward the room, an air intake port that takes the outside air from the outdoor space into the room by the first blower, a whole-building air conditioning unit that is arranged in the room and includes a second blower that blows the outside air taken in from the air intake port, an air outlet that sends air that has passed through the whole-building air conditioning unit to the multiple rooms by the second blower, an indoor air intake port that takes in air from an indoor space, an indoor air intake port that is arranged above the whole-building air conditioning unit and takes in room air into the whole-building air conditioning unit, and an exhaust port that expels the air taken in from the indoor air intake port to the outdoor space, and the air volume f of the second blower is greater than the air volume F of the first blower.

[0008] Preferably, an air volume ratio f / F of the air volume F of the first fan to the air volume f of the second fan in the central air-conditioning unit is equal to or greater than 1.3.

[0009] Preferably, the central air conditioning unit further includes an air conditioner that exchanges heat with the outside air of the outdoor space taken in by the first fan.

[0010] Preferably, the whole-house air conditioning unit further includes a housing enclosing the air conditioner and the second blower.

[0011] Preferably, one of the standing walls constituting the room has an opening closed by an openable / closable door body, and the indoor air intake is provided at a lower end of the standing wall having the opening.

[0012] Preferably, the first fan is a ventilation device. [Effects of the Invention]

[0013] According to the air conditioning controlled room of the present invention, ventilation efficiency can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram showing a building in which an air conditioning controlled room according to an embodiment of the present invention is used. [Figure 2] 1 is a side view showing an air conditioning control room according to an embodiment of the present invention with a standing wall removed. [Figure 3] FIG. 2 is a perspective view of a housing arranged in an air conditioning controlled room. [Figure 4] FIG. 2 is a side view of a housing arranged in an air conditioning controlled room. [Figure 5] FIG. 10 is a diagram illustrating a problem in an air conditioning control room, and corresponds to FIG. 2. [Figure 6] FIG. 10 is a scatter diagram showing the relationship between the effective ventilation rate and the air volume ratio. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which like reference numerals denote like or corresponding parts and will not be described repeatedly.

[0016] Prior to describing the air conditioning control room 40 according to this embodiment, an overview of a building 10 in which the air conditioning control room 40 is installed will be described with reference to Fig. 1. The building 10 employs a central air conditioning system and a 24-hour ventilation system.

[0017] Referring to Figure 1, building 10 is, for example, a two-story house with a plurality of rooms arranged in the indoor space. Living rooms 11 and 12 and a non-living room 13 are arranged on the first floor of house 10. Living room 11 is, for example, a living room, and living room 12 is, for example, a private room such as a bedroom. Non-living room 13 is a passageway (corridor or entrance hall) with an entrance to a staircase 14.

[0018] The second floor (i.e., the top floor) of the house 10 is equipped with a plurality of habitable rooms 15, 16 and a non-habitable room 17. The habitable rooms 15, 16 are private rooms such as bedrooms. The non-habitable room 17 is a passageway (corridor) with a staircase leading down. In other words, the staircase 17 is an open atrium that connects the first and second floors, and the non-habitable room 17 on the second floor and the non-habitable room 13 on the first floor are connected via the staircase 17 without any partition. Therefore, these non-habitable rooms 13, 17 form a single hall. An air conditioning control room 40 is provided facing the non-habitable room 17 located on the second floor.

[0019] The air conditioning control room 40 is a room separated by a vertical wall of the house 10. The air conditioning control room 40 is a room for sending conditioned air that has undergone heat exchange to multiple rooms in the house 10 and for ventilating the multiple rooms.

[0020] In this embodiment, "room" includes both living and non-living rooms, and "living rooms" refer to rooms that are used continuously for purposes such as living, working, and recreation, and "non-living rooms" refer to rooms other than living rooms, excluding rooms used for sanitary purposes (e.g., toilets and bathrooms) and storage rooms.

[0021] Ceiling spaces 20 are formed between the first and second floors of the house 10, and between the second floor and the roof. A branch chamber 61 is provided in this ceiling space 20 and connected to a main duct 60 extending from the air conditioning control room 40. The branch chamber 61 branches into multiple branch ducts 62. The branch ducts 62 are connected to air outlets 70 provided in the ceiling partitions 21 of each room. This allows conditioned air sent out from the air conditioning control room 40 to be sent to each of the rooms 11, 12, 15, and 16.

[0022] A ventilation device 31 is located in the ceiling space 20 between the second floor and the roof. The ventilation device 31 is typically a central heat exchange ventilation fan, and is capable of simultaneously exhausting and supplying air. The ventilation device 31 has the function of supplying air from the outdoor space (outside air) to an air intake port 33 via an air intake duct 32 and sending it to the air conditioning control room 40, and the function of discharging air from inside the building 10 (non-occupied rooms 13, 17) to the outdoors from an exhaust port 35 via an exhaust duct 34.

[0023] The ventilation device 31 is typically a heat exchange ventilation fan, but it is sufficient if it has at least the function of a blower that sends outside air from the outdoor space toward the air conditioning control room 40. In the following explanation, the ventilation device 31 will be described as a "first blower 31."

[0024] <About the air conditioning control room> 2 to 4, the air conditioning controlled room 40 according to this embodiment will be described in detail. In Fig. 2 to 4, the direction indicated by arrow A1 is referred to as the up-down direction, the direction indicated by arrow A3 is referred to as the forward direction, and the opposite direction is referred to as the backward direction. In Fig. 3, the direction indicated by arrow A2 is referred to as the lateral direction.

[0025] The air conditioning control room 40 generally includes a room 41, an air intake port 33, a central air conditioning unit 50, a main duct (air outlet) 60, and an exhaust port 35.

[0026] As shown in Figures 2 and 3, the room 41 is surrounded by a pair of side walls 42, a rear wall 43, a front wall 44, a floor wall 45, and a ceiling wall 46. The front wall 44 has an opening that connects to the non-occupied room 17. An openable door body 47 is provided in the opening. This makes it possible to open the door body 47 and perform maintenance on the air conditioning control room 40. The door body 47 is typically a hinged door, but may also be a sliding door, a folding door, or the like. The room 41 is preferably formed with a soundproof wall to prevent internal sound from leaking out.

[0027] An indoor air intake 48 is provided below the door body 47 to take in air from the non-occupied room 17. The indoor air intake 48 directly takes in air from the non-occupied room 17, but also indirectly takes in air from indoor spaces such as other non-occupied rooms 13 and occupied rooms 11, 12, 15, and 16. The indoor air intake 48 is a gap between the door body 47 and the floor wall 45, known as an undercut. The dimension of the indoor air intake 48 is, for example, approximately 5 mm to 10 mm.

[0028] 2, a central air conditioning unit 50 is disposed on the side of the door body 47. In the central air conditioning unit 50, an air conditioner 51, an air conditioning box 53, and a second blower 54 are arranged vertically, and the entire unit is covered by a housing 55 shown in FIG.

[0029] The housing 55 includes a front surface 56 facing the front wall 44, a rear surface 57 facing the rear wall 43 with a gap therebetween for the main duct 60, a floor surface 58 located on the floor wall 45, and an upper surface 59 protruding from the upper edge of the front surface 56 toward the rear surface 57. The air intake port 33 is located at the upper end of the rear surface 57. Therefore, the upper surface 59 does not extend all the way to the rear surface 57 in the depth direction, but extends only partway. A heat insulating material may be attached to the front surface of the housing 55 to prevent condensation. The main duct 60 is provided between the rear surface 57 of the housing 55 and the rear wall 43.

[0030] The air intake port 33 takes in air from the outdoor space into the room 41. The air intake port 33 is located at the tip of the air intake duct 32, which penetrates the top wall 46, and is located below the top wall 46. As shown in FIGS. 3 and 4 , the air intake port 33 is formed in a generally box-like shape and includes an upper plate portion 33a that protrudes forward from the front of the air intake duct 32, a front plate portion 33b that extends downward from the front end of the upper plate portion 33a, and a lower plate portion 33c that protrudes forward from the rear lower end of the air intake duct 32. The upper plate portion 33a is higher than the height position of the upper surface 59 of the housing 55, and the lower plate portion 33c is lower than the height position of the upper surface 59 of the housing 55. Downward openings are formed in the front end of the lower plate portion 33c and the lower end of the front plate portion 33b. Therefore, these downward openings are located at a position lower than the height position of the upper surface 59 of the housing 55. As shown in FIG. 2, air from the outdoor space sent from the air supply duct 32 is sent to the air conditioner 51 through this downward opening.

[0031] A gap 49 is provided between the air intake 33 and the top surface 59 of the housing 55. Specifically, the gap 49 is provided between the front end of the front panel portion 33b of the air intake 33 and the rear end of the top surface 59 of the housing 55. This gap 49 is a "room air intake" that takes air from inside the room 41 into the central air-conditioning unit 50. Central air-conditioning requires a large amount of ventilation air, but by taking in air from inside the room 41 through the room air intake, the air volume required for central air-conditioning can be ensured.

[0032] The air conditioner 51 is, for example, a wall-mounted air conditioner for home use. The air conditioner 51 is attached to the upper side of the housing 55. As a result, the air conditioner 51 is attached to approximately the upper end of the housing 55 in the vertical direction. The air conditioner 51 includes an intake port 51a for taking in outside air and an outlet port 51b for discharging the air taken in through the intake port 51a as conditioned air. The intake port 51a is provided at the top, and the outlet port 51b is provided at the bottom. The air conditioner 51 is located below the air supply port 33. Because the intake port 51a of the air conditioner 51 is located at the top, air from the outdoor space can be efficiently taken into the air conditioner 51 from the air supply port 33. The air conditioner 51 operates in summer and winter but is stopped during intermediate seasons such as spring and autumn.

[0033] An air conditioning box 53 is provided below the air conditioner 51. The air conditioning box 53 sends the conditioned air sent out from the air conditioner 51 to the second blower 54. A filter for purifying the air sent out from the air conditioner 51 is disposed in the air conditioning box 53, and the purified air is guided to the second blower 54.

[0034] The second blower 54 sends out the air purified in the air conditioning box 53 toward the main duct 60. The second blower 54 is, for example, a blowing fan. The second blower 54 sends out air toward the rear surface 57 of the housing 55.

[0035] The main duct 60 is an air outlet that sends out conditioned air that has undergone heat exchange by the air conditioner 51 to multiple rooms. One longitudinal end of the main duct 60 is airtightly connected to the second blower 54, and the other longitudinal end is connected via a branch chamber to a branch duct 62 (FIG. 1) that sends air to multiple rooms. The main duct 60 is configured to branch not only upward but also downward to send out conditioned air to the indoor spaces on the first and second floors. This configuration allows the air conditioning control room 40 itself to be made smaller, thereby reducing costs.

[0036] <Air conditioning air flow> The air flow in the house 10 will be described with reference to Figures 1 and 2. The arrows in Figure 2 indicate the flow of air and conditioned air. This air flow occurs not only in the summer or winter when the air conditioner 51 is operating, but also in intermediate seasons when the air conditioner 51 is not operating.

[0037] As shown in FIG. 1, air from an outdoor space is supplied into the air conditioning control room 40 through the air supply duct 32 and the air supply port 33. As shown in FIG. 2, the air supplied to the air conditioning control room 40 is directly drawn into the air intake port 51a of the air conditioner 51. Furthermore, the air intake port 51a of the air conditioner 51 also draws air from the room 41 through the room air intake port 49, as indicated by the dashed arrow. The air drawn into the air intake port 51a of the air conditioner 51 in this manner undergoes thermal conversion and is discharged as conditioned air from the air discharge port 51b of the air conditioner 51. The conditioned air passes through the air conditioning box 53, where it is purified, and then sent to the second fan 54. The conditioned air sent to the second fan 54 then passes through the main duct 60 and, as shown in FIG. 1, passes through the branch chamber 61, where it is branched into multiple branch ducts 62, and the conditioned air is sent to each room through the air outlet 70.

[0038] As shown in Figure 1, air conditioning control room 40 is adjacent to non-occupied room 17, and non-occupied room 17 is connected to non-occupied room 13 on the first floor through an open ceiling, with air on the first floor also communicating with air conditioning control room 40 on the second floor through non-occupied rooms 13 and 17. Therefore, air from non-occupied room 17 is supplied into air conditioning control room 40 through indoor air intake 48 of air conditioning control room 40. Furthermore, the air supplied into air conditioning control room 40 is exhausted to the outdoor space through exhaust duct 34 from exhaust outlet 35.

[0039] As a result, the air conditioning control room 40 of this embodiment can ventilate the indoor space while employing a central air conditioning system. Also, because the air conditioning control room 40 is provided with an exhaust vent 35 for ventilation, there is no need to provide an exhaust vent in the ceiling of the non-occupied room 17, improving the design of the house 10. Furthermore, because the air conditioning control room 40 is fitted with sound-absorbing walls, noise associated with exhaust can be reduced even if the exhaust vent 35 is provided.

[0040] In the air conditioning control room 40 of this embodiment, it is preferable that all outside air taken in through the air intake 33 is sent to the central air conditioning unit 50, where it is conditioned, and then sent out to each of the rooms 11, 12, 15, and 16, and the air from the indoor space that returns to the air conditioning control room 40 through the indoor air intake 48 is exhausted to the outdoor space through the exhaust vent 35, thereby performing central air conditioning and ventilation of the entire building. However, there are cases where the air does not flow in this way.

[0041] Figure 5 shows a problem in an air conditioning control room. Referring to Figure 5, particularly during intermediate periods when air conditioners 51 are not operating, a "short circuit" may occur in which outside air taken into central air conditioning unit 50 through air supply port 33 is exhausted to the outdoor space via room air intake port 49 and exhaust port 35, as shown by arrow S. When this short circuit occurs, the outside air taken in through air supply port 33 is immediately exhausted through exhaust port 35, resulting in poor ventilation efficiency.

[0042] As a result of extensive research, the present inventor has found that in order to suppress this short circuit and improve ventilation efficiency, attention should be paid to the air volume of the first fan 31 and the air volume of the second fan 54.

[0043] In order to prevent short circuiting, the airflow rate (F) of the first fan 31 is set smaller than the airflow rate (f) of the second fan 54 to create a negative pressure inside the central air-conditioning unit 50. Specifically, when the airflow rate (F) of the first fan 31 is compared with the airflow rate (f) of the second fan 54 on plane A in the housing 55 shown in FIG. 2, the following ratio holds. Plane A is the boundary between the area where the air conditioner 51 is located and the air-conditioning box 53 where the filter is located, and is the cross-sectional shape of the housing 55, which is typically rectangular. Air volume (f) of second fan 54 / air volume (F) of first fan 31=1.3 or more

[0044] In other words, the air volume ratio (f / F) is 1.3 or more, and preferably 1.4 or more. If the air volume ratio is less than 1.3, negative pressure will not be created inside the housing 55 of the central air-conditioning unit 50, and air from inside the room 41 will not be taken into the housing 55 through the room air intake 49. Conversely, air will leak from the room air intake 49 toward the exhaust outlet 35, causing a short circuit. Furthermore, if the air volume ratio is 1.4 or more, the occurrence of a short circuit can be more effectively prevented than when it is 1.3 or more.

[0045] <About the experiment in the air conditioning control room> Next, an experiment conducted by the inventor to analyze the relationship between the air volume ratio of the first fan 31 and the second fan 54 in the air-conditioning controlled room of this embodiment will be described.

[0046] FIG. 6 is a scatter diagram showing the relationship between the effective ventilation rate and the airflow ratio, with the effective ventilation rate on the vertical axis and the airflow ratio on the horizontal axis. Here, the effective ventilation rate is the proportion of fresh air (outside air) contained in the air sent from the central air-conditioning unit 50 to each of the rooms 11, 15, and 16. A high value indicates efficient ventilation. The airflow ratio is the airflow rate (f) of the second fan 54 divided by the airflow rate (F) of the first fan 31. The inventors varied the airflow rate of the outside air sent into the room 41 from the air intake vent 33 and changed the airflow ratio between the first fan 31 and the second fan 54, and measured the effective ventilation rate for each airflow ratio.

[0047] The results obtained from the above-mentioned measurements are shown in the plots in Figure 6. The different shapes of the plots (circles, triangles, and squares) represent the results when the volume of outside air sent into room 41 from air intake 33 is changed. The curves in Figure 6 are approximate curves for all the plots. The approximate curves show that when the air volume ratio is less than 1.3, the effective ventilation rate is less than 95%, when the air volume ratio is 1.4, the effective ventilation rate is over 95%, when the air volume ratio is 1.45, the effective ventilation rate is 98%, and when the air volume ratio is 1.5 or more, there is almost no fluctuation in the effective ventilation rate.

[0048] From the results of this experiment, the inventors have found that even if the volume of outside air sent into room 41 from air intake 33 varies, by setting the air volume ratio of first fan 31 to second fan 54 to be 1.4 or more, it is possible to create a negative pressure inside central air conditioning unit 50, prevent short circuits, and improve the ventilation efficiency of air conditioning control room 40. From the above, the ratio of the air volume of second fan 54 to the air volume of first fan 31 should be 1.3 to 1.5, and preferably 1.4 to 1.5.

[0049] <Other embodiments> Although the air conditioning controlled room 40 in this embodiment is described as being provided in the house 10, the air conditioning controlled room 40 may be provided separately as a standalone unit.

[0050] The central air conditioning unit 50 of the air conditioning control room 40 in this embodiment includes the air conditioner 51, but it is sufficient if it is equipped with at least the second blower 54. Furthermore, the central air conditioning unit 50 includes the housing 55 that surrounds the air conditioner 51 and the second blower 54, but the housing 55 is not an essential component.

[0051] Furthermore, the second blower 54 is positioned below the air conditioner 51 and the air conditioning box 53, and has been described as conditioning the outside air taken in through the air intake 33 with the air conditioner 51, purifying the conditioned air with the air conditioning box 53, and blowing out the purified conditioned air; however, it is sufficient if the second blower 54 at least sends out the outside air taken in through the air intake 33 to the air outlet 70 and delivers it to each room.

[0052] Furthermore, although the first fan 31 in this embodiment is arranged in the ceiling space 20, it may also be arranged in a ventilation control room arranged adjacent to the air conditioning control room 40.

[0053] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0054] 10 Residence (building), 31 Ventilation device (first blower), 33 Air intake, 35 Exhaust vent, 40 Air conditioning control room, 41 Room, 47 Door body, 48 Indoor air intake, 49 Gap (room air intake), 50 Whole-building air conditioning unit, 51 Air conditioner, 54 Second blower, 55 Housing, 70 Outlet.

Claims

1. An air conditioning control room that sends heat-exchanged conditioned air to a plurality of rooms in a building and ventilates the plurality of rooms, a room surrounded by a plurality of upright walls of the building; a first fan that sends outside air from an outdoor space toward the room; an air intake port through which outside air from an outdoor space is taken into the room by the first fan; a central air conditioning unit including a second fan disposed in the room and configured to blow outside air taken in through the air intake port; an air outlet through which the air that has passed through the central air-conditioning unit is sent to the plurality of rooms by the second blower; an indoor air intake that takes in air from the indoor space; a room air intake provided above the central air conditioning unit and adapted to take air from the room into the central air conditioning unit; an exhaust port that discharges the air taken in from the indoor air intake port to an outdoor space, An airflow rate f of the second fan is greater than an airflow rate F of the first fan.

2. 2. The air conditioning controlled room according to claim 1, wherein an air volume ratio f / F of an air volume F of the first fan to an air volume f of the second fan in the central air conditioning unit is 1.3 or more.

3. The air conditioning controlled room according to claim 1 or 2, wherein the central air conditioning unit further includes an air conditioner that exchanges heat with the outside air of the outdoor space taken in by the first fan.

4. The air conditioning controlled room according to claim 3 , wherein the central air conditioning unit further includes a housing that encloses the air conditioner and the second blower.

5. one of the standing walls constituting the chamber has an opening closed by an openable / closable door body; The air-conditioning controlled room according to claim 1 or 2, wherein the indoor air intake is provided at a lower end of the standing wall having the opening.

6. The air-conditioning controlled room according to claim 1 or 2, wherein the first fan is a ventilation device.

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