JP2014139497A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of wind sound when blowing means blows air into a room including a ventilation portion through which the air can flow to an outside.SOLUTION: An air conditioning system 40 comprises: an indoor unit 42 having Lo, Me, and Hi modes having different air blow amounts, respectively; a pressure sensor 44 detecting an internal pressure of a room 24; and a return grill 50 capable of changing a ventilation amount from an inside of the room 24 to an outside thereof. In the air conditioning system 40, if the indoor unit 42 operates in the Hi mode and the pressure sensor 44 detects a high pressure state, the return grill 50 increases the ventilation amount from the inside of the room 24 to the outside thereof. By doing so, the internal pressure of the room 24 falls and an increase in the ventilation amount of a ventilation portion 36 formed in a partition wall 22A of the room 24 is suppressed. This can suppress generation of wind sound in the ventilation portion 36.

Description

  The present invention relates to an air conditioning system.

  The grill of Patent Document 1 is used in an air conditioning system, and includes a grill main body in which a large number of louver walls are provided in parallel, and a ventilation adjustment mechanism that adjusts the ventilation amount of the grill main body. . The ventilation adjustment mechanism includes an adjustment valve that opens and closes the ventilation passage and an adjustment tool that opens and closes the adjustment valve. In the grill of Patent Document 1, the amount of air passing through the exhaust passage (aeration amount) is adjusted by sliding the adjustment tool along the louver wall to change the opening / closing degree of the adjustment valve.

  However, Patent Document 1 does not describe use of a grill when operating a blower that blows air into a room. For this reason, in the configuration of Patent Document 1, when there is a ventilation portion capable of venting to the outside in a part of the room and the ventilation amount of the exhaust passage is small, the ventilation amount flowing from the ventilation portion to the outside increases, There was a noise.

JP 2004-125338 A

  An object of the present invention is to obtain an air conditioning system capable of suppressing the generation of wind noise when air is blown by a blowing means in a room having a ventilation portion that can vent to the outside.

  The air conditioning system according to the invention of claim 1 is capable of switching a plurality of operation modes having different blast volumes, and is configured to blow air into the room, pressure detecting means for detecting the pressure in the room, and the room. Ventilation amount changing means provided on a wall to be configured and changing a ventilation amount from the inside of the room to the outside of the room based on the operation mode and the pressure.

  In the air conditioning system according to the first aspect of the present invention, the operation mode of the air blowing means is switched (selected) automatically or manually, and the air blowing means blows air into the room so as to be the air flow rate of the selected operation mode. And a pressure detection means detects the pressure in a room. Note that a ventilating portion (for example, a gap between the sliding door and the wall) capable of venting the outside of the room is formed in the blown room.

  Here, for example, when the mode of the air blowing means is an operation mode with a large air flow rate and the pressure detecting means detects a pressure higher than the set pressure, the air flow rate changing means moves from the inside of the room to the outside of the room. Increase air flow. As a result, the pressure in the room is reduced and the increase in the ventilation volume of the ventilation part is suppressed, so that the wind noise when blowing air to the room having the ventilation part capable of venting to the outside by the blowing means Can be suppressed. On the other hand, when the mode of the air blowing means is an operation mode with a small air flow rate or when the pressure detecting means detects a pressure equal to or lower than the set pressure, it is difficult for wind noise to be generated in the air venting portion, so the air flow changing means Maintains air flow or reduces air flow.

  An air conditioning system according to a second aspect of the present invention is provided with temperature detecting means for detecting the temperature in the room, and the air blowing means is configured such that the temperature detected by the temperature detecting means becomes a set temperature. Switch the operation mode.

  In the air conditioning system according to the second aspect of the present invention, the air blowing means switches the plurality of operation modes so that the temperature detected by the temperature detecting means becomes the set temperature. For example, when the temperature detected by the temperature detecting means is higher than the set temperature, the air flow rate by the air blowing means is increased. When the temperature detected by the temperature detecting means is lower than the set temperature, the air flow rate by the air blowing means is increased. Decrease.

  Thus, in the air conditioning system according to the second aspect of the present invention, it is possible to prevent the air blowing means from operating in the operation mode with a large air flow, and to suppress excessive (excessive) energy consumption due to the operation of the air blowing means. Therefore, energy saving of the air conditioning system can be realized.

  In the air conditioning system according to a third aspect of the present invention, the air flow rate changing means is the highest pressure state in which the pressure state detected by the pressure detection means is equal to or higher than a set pressure, and is the most sent among the plurality of operation modes. In the operation mode with a large air volume, the air flow rate is increased as compared with other operation modes.

  In the air conditioning system according to the third aspect of the present invention, the pressure state detected by the pressure detection means is in a high pressure state that is equal to or higher than the set pressure, and until the operation mode with the largest amount of air flow among the plurality of operation modes. The air flow rate changing means does not perform the operation of increasing the air flow rate. Thus, in the air conditioning system according to the third aspect of the present invention, excessive energy consumption due to unnecessary operation of the ventilation amount changing means is suppressed, so that energy saving of the air conditioning system can be realized.

  According to a fourth aspect of the present invention, there is provided an air conditioning system in which the ventilation amount changing means includes a ventilation member formed with a through hole that allows ventilation from the inside of the room to the outside, and the ventilation angle so that the arrangement angle with respect to the ventilation member can be changed. A ventilation amount changing member that is provided in the member and changes the ventilation amount of the through hole by changing the arrangement angle.

  In the air conditioning system according to the fourth aspect of the present invention, the ventilation amount of the through hole is changed by changing the arrangement angle of the ventilation amount changing member with respect to the ventilation member. Here, since the ventilation rate changing member is provided in the ventilation member, a space required for installing the ventilation rate changing member is smaller than a configuration in which the ventilation rate changing member is provided in a place different from the ventilation member. Thereby, the enlargement of the ventilation amount changing means can be suppressed.

  In the air conditioning system according to a fifth aspect of the present invention, the air flow rate changing member stops at an arrangement angle at which the air flow rate of the through hole is maximized in the operation mode with the largest air flow rate among the plurality of operation modes.

  In the air conditioning system according to the fifth aspect of the invention, since the air flow rate changing member stops at an arrangement angle at which the air flow rate of the through hole is maximized, the resistance (pressure loss) acting on the gas (air) that passes through the through hole. Becomes the smallest. Thereby, the pressure in the room can be easily reduced.

  In the air conditioning system according to the invention of claim 6, the air flow rate changing member is inclined so as to cover the through-hole when the pressure state detected by the pressure detecting means is in a low pressure state lower than a set pressure. Is arranged.

  In the air conditioning system according to the sixth aspect of the present invention, when the pressure state in the room is a low pressure state lower than the set pressure, and when the air blowing means is stopped, the air flow rate changing member is penetrated. Inclined to cover the hole. Thereby, since advancing of light is interrupted or reduced by the ventilation amount changing member, light leakage to the outside of the room can be suppressed.

  In the air conditioning system according to the seventh aspect of the present invention, the air blowing means includes a first operation mode for the first air flow rate, a second operation mode for the second air flow rate that is greater than the first air flow rate, and the second air supply system. A third operation mode of a third air flow rate that is greater than the air flow rate, and the air flow rate changing means is in a high pressure state that is equal to or higher than a set pressure in which the pressure state detected by the pressure detection means is set, and In the third operation mode, the air flow rate is increased as compared with the first operation mode and the second operation mode.

  In the air conditioning system according to the seventh aspect of the invention, since the amount of air blown into the room by the air blowing means can be changed in three stages, the operation mode of the air blowing means is switched compared to a configuration in which the air volume is changed in two stages. It is possible to suppress a sudden change in the amount of air flow.

  In the air conditioning system according to an eighth aspect of the present invention, the air blowing means is provided in another room adjacent to the room, and the air flow rate changing means is provided on a wall that partitions the room from the other room. Yes.

  In the air conditioning system according to the invention of claim 8, the gas (air) in the room flows through the ventilation amount changing means to another room where the air blowing means is provided. Thereby, since the gas which the ventilation means ventilated in the room returns to the ventilation means and can be used, the utilization efficiency of the gas in a ventilation means can be raised.

  According to the air conditioning system of the first aspect of the present invention, it is possible to suppress the generation of wind noise when the air is blown by the air blowing means into the room having the ventilation portion that can vent to the outside. Has an effect.

  The air conditioning system according to the second aspect of the present invention has an excellent effect that energy saving of the air conditioning system can be realized.

  The air conditioning system according to the third aspect of the present invention has an excellent effect that energy saving of the air conditioning system can be realized.

  According to the air conditioning system of the present invention as set forth in claim 4, there is an excellent effect that an increase in the size of the ventilation amount changing means can be suppressed.

  According to the air conditioning system of the present invention described in claim 5, it has an excellent effect that the pressure in the room can be easily reduced.

  According to the air conditioning system of the present invention described in claim 6, it has an excellent effect that light leakage to the outside of the room can be suppressed.

  According to the air conditioning system of the present invention as set forth in claim 7, it has an excellent effect that it is possible to suppress a sudden change in the air flow rate when the operation mode of the air blowing means is switched.

  According to the air conditioning system of the present invention as set forth in claim 8, there is an excellent effect that the utilization efficiency of the gas in the blowing means can be increased.

It is a whole block diagram of the building which has an air-conditioning system concerning this embodiment. (A) It is a front view which shows the return grill and sliding door which concern on this embodiment. (B) It is explanatory drawing which planarly viewed the return grille, sliding door, and indoor unit (area | region shown with the broken line S in FIG. 1) which concern on this embodiment. (A) It is a block diagram which shows the connection of the controller which concerns on this embodiment, an indoor unit, a pressure sensor, a control part, and a return grill. (B) It is a schematic diagram of the control board mounted in the indoor unit which concerns on this embodiment. (A), (B) It is a schematic diagram which shows the ventilation | gas_flowing state of a through-hole when moving the flap of the return grill which concerns on this embodiment from an initial position to an open position. It is a flowchart which shows the switching process of ON mode and OFF mode of a return grill which concerns on this embodiment. (A) It is a schematic diagram which shows the state by which generation | occurrence | production of a wind noise is reduced in the air conditioning system which concerns on this embodiment. (B) It is a schematic diagram which shows the state in which a wind noise generate | occur | produces in the air conditioning system which concerns on a comparative example. It is a whole block diagram of the modification of the building which has an air-conditioning system concerning this embodiment.

  An example of the air conditioning system according to the present embodiment will be described.

(overall structure)
FIG. 1 shows an overall configuration of a building 10 as an example of the present embodiment. In the following description, the girder direction of the building 10 is the X direction (arrow X in the figure), the wife direction is the Y direction (arrow Y in the figure), and the height direction is the Z direction (arrow Z in the figure). Describe.

  As shown in FIG. 1, the building 10 includes a first floor portion 12, a second floor portion 14, and a roof portion 16 as an example. The first floor portion 12 and the second floor portion 14 include a plurality of rooms 24, 25, 26, 27, 28, 29 partitioned by a plurality of partition walls 22 standing upright in the Z direction, a first floor portion 12 and a second floor portion 14, And a staircase hole 30 is formed.

  In the first floor portion 12, the room 26, the staircase hall 30, the room 24, and the room 25 are arranged in this order in the X direction, and in the second floor portion 14, the room 29, the staircase hall 30, the room 27, and the room 28. Are arranged in this order in the X direction. The first floor portion 12 is provided with a floor 17A and a ceiling 19A, and the second floor portion 14 is provided with a floor 17B and a ceiling 19B.

  The staircase hall 30 is provided with a stairway 32 for moving from the first floor portion 12 to the second floor portion 14. The lower side of the staircase 32 in the Z direction is surrounded by a partition wall 22 that partitions the staircase hall 30 and the room 24 (hereinafter, this partition wall 22 will be referred to as a partition wall 22A), a floor 17A, and the staircase 32. The under-stairs space 34 is formed as an example of the other room. The partition wall 22A is an example of a wall.

  Each partition wall 22 is provided with an entrance that communicates with each room and a door that opens and closes the entrance, but the illustration is omitted. Each partition wall 22 is provided with a ventilation portion 36 that allows adjacent rooms to communicate with each other with a size that allows ventilation. The ventilation portion 36 is not limited to the undercut formed between the lower end of the door provided on the partition wall 22 and the floors 17A and 17B, but is a door (sliding door) provided on the partition wall 22 as described later. 35) and the partition wall 22 are also included.

  In the building 10, an air conditioning system 40 that performs air conditioning of the first floor portion 12 and the second floor portion 14 is constructed. Air conditioning is the concept of air conditioning of the building 10 and includes the adjustment of the indoor environment such as temperature, humidity, and air cleanliness. Although the air conditioning system 40 includes a ventilator, illustration and description thereof are omitted.

(Main part configuration)
Next, the air conditioning system 40 will be described.

(Air conditioning system)
As shown in FIG. 1, the air conditioning system 40 includes indoor units 42 and 43 as an example of air blowing means for blowing air into the rooms 24 to 29, and pressure as an example of pressure detection means provided in the rooms 24, 25, and 27. It has a sensor 44 and a return grill 50 as an example of a ventilation amount changing means. The outdoor unit 41 is included in an example of a blowing unit. Further, the air conditioning system 40 controls the operation of the return grill 50 based on the operation mode of the outdoor unit 41 and the indoor units 42 and 43 and the output (detection result) of the pressure sensor 44 (FIG. 3 ( A) see).

(Indoor unit and outdoor unit)
Two outdoor units 41 are arranged outside the building 10 so as to correspond to the indoor units 42 and 43. The indoor unit 42 is disposed in the space 34 under the stairs of the first floor portion 12, and the indoor unit 43 is disposed in the roof portion 16. The outdoor unit 41 and the indoor unit 42, and the outdoor unit 41 and the indoor unit 43 are connected using heat medium pipes 45A and 45B and control wires (not shown). The heat medium pipes 45A and 45B are configured to include a pipe through which a gas (gas) state heat medium flows and a pipe through which a liquid state heat medium flows.

  Here, as an example, the air conditioning system 40 in the room 24 and the space 34 under the stairs will be described. Note that an air conditioning system 40 having the same configuration is also provided for the room 25 of the first floor portion 12 and the room 27 of the second floor portion 14, which will be described later.

  The indoor unit 42 is formed with an air intake 42C. Then, the air taken in from the intake port 42C is cooled or heated by heat exchange with the heat medium circulating in the heat medium pipe 45A in the indoor unit 42 and blown toward the room 24. ing.

  One end of a chamber duct 46 disposed on the lower side of the floor 17 </ b> A in the Z direction is connected to the indoor unit 42, and an underfloor branch chamber 47 is provided at the other end of the chamber duct 46. One end of blowing ducts 48A, 48B, 48C is connected to the underfloor branch chamber 47, and the other end of the blowing ducts 48A, 48B, 48C is provided on the floor 17A of the rooms 24, 25, 26. The floor blowing chambers 49A, 49B, and 49C thus connected are connected. Further, the floor blowout chambers 49A, 49B, and 49C are provided with blowout grills (not shown) that serve as blowout openings for air into the rooms 24, 25, and 26.

  As shown in FIG. 3B, the indoor unit 42 is provided with a control board 42A for controlling the operation of the indoor unit 42. A motor 42B that rotationally drives a fan (not shown) for blowing air is electrically connected to the control board 42A. Further, a controller 51 (including a built-in temperature sensor 53) and a control unit 70 for a resident to operate the indoor unit 42 and a control unit 70 are electrically connected to the control board 42A. Thereby, the temperature information set by the controller 51, the ON / OFF information of the operation of the indoor unit 42, and the temperature information in the room 24 (see FIG. 1) are input to the control board 42A.

Furthermore, in the control board 42A, the stop mode, which is an example of the operation mode of the indoor unit 42, the Lo mode of the low air volume (first air volume), the Me mode of the standard air volume (second air volume), and the high air volume ( The third (air flow rate) Hi mode can be selected (switched). And as an example, the indoor unit 42 operates in a Lo mode with a first air flow rate of about 800 [m ³ / h], in a Me mode with a second air flow rate of about 1000 [m ³ / h], a Hi mode Thus, the operation is performed such that the third air blowing amount is about 1200 [m ³ / h].

  Here, in the control board 42A, the set temperature Ts set by the controller 51 (built-in temperature sensor 53 (see FIG. 3A)) and the temperature T detected by the temperature sensor 53 built in the controller 51 are obtained. To be compared. Then, on the control board 42A, one of the Lo, Me, and Hi modes is selected so that the temperature T approaches the set temperature Ts, and the drive of the motor 42B is controlled (the operation mode is switched). The indoor unit 42 generates warm air when the heating operation is selected, and generates cold air when the cooling operation is selected. Note that the operation mode information of the indoor unit 42 is sent to the control unit 70.

  In the present embodiment, the Lo mode is an example of the first operation mode, the Me mode is an example of the second operation mode, and the Hi mode is an example of the third operation mode.

(Pressure sensor)
As an example, the pressure sensor 44 illustrated in FIG. 3A includes a wind pressure switch. In the wind pressure switch, the pressure receiving part detects a minute change in air pressure, and operates the switch to control ON / OFF of the external electric circuit. For example, as the wind pressure switch, a wind pressure switch such as C4065 or C6065 manufactured by Azbil Corporation can be used. Further, the pressure sensor 44 is attached to the ceiling 19 </ b> A (see FIG. 1) in the room 24 and is electrically connected to the control unit 70.

In the present embodiment, as an example, when the pressure sensor 44 detects a pressure (high pressure state) higher than the atmospheric pressure (1.01325 × 10 ⁵ [Pa]) that is a preset set pressure, the pressure sensor 44 turns from OFF to ON. It is supposed to switch to. Then, ON / OFF information of the pressure sensor 44 is sent to the control unit 70.

(Temperature sensor)
As shown in FIG. 1, a temperature sensor 53 as an example of a temperature detecting unit is built in a controller 51 and configured to detect the temperature of a room 24. 3A and 3B, the temperature sensor 53 built in the controller 51 is electrically connected to the control board 42A, and the temperature of the temperature sensor 53 built in the controller 51 is high. Information is sent to the control board 42A.

(Partition wall)
As shown in FIG. 2A, the partition wall 22A is formed with an entrance / exit 23 that is long in the Z direction and penetrates in the X direction. In addition, a sliding door 35 that is slidable in the Y direction and opens or closes the entrance 23 is provided on the side of the partition wall 22A below the staircase space 34 (see FIG. 1).

  FIG. 2B shows a state in which the peripheral portion of the sliding door 35 is viewed from the upper side in the Z direction with the sliding door 35 closing the entrance 23. In this state, when the sliding door 35 is viewed in the X direction, the Y direction end of the sliding door 35 and the peripheral edge of the doorway 23 overlap. In FIG. 2B, the sliding door 35 and the return grill 50 are shown arranged in the same plane in order to clarify the arrangement relationship in the X direction.

  Here, ventilation is possible between the side surface 35A on the Y-direction end of the sliding door 35 and on the side of the room 24, and the side surface 23A on the peripheral edge of the doorway 23 (partition wall 22A) and on the side of the staircase space 34. A ventilation portion 36 (range surrounded by a broken line D) that is a gap is formed. As shown in FIG. 2A, a return grill 50 is provided between the upper end of the entrance 23 in the partition wall 22A and the ceiling 19A.

(Return grill)
As shown in FIG. 4A, the return grill 50 includes a grill body 52 as an example of a ventilation member, and a ventilation amount changing member provided in the grill body 52 and capable of changing the arrangement angle θ with respect to the grill body 52. As an example, a plurality of flaps 54 and 55 are provided. Further, the return grill 50 has a drive unit 58 that rotationally drives shafts 54A and 55A (described later) of the plurality of flaps 54 and 55.

  As an example, the grill main body 52 has a rectangular tube shape in which a through hole 56 is formed, and is attached to the partition wall 22A so that the through direction of the through hole 56 is along the X direction. That is, the grill main body 52 has side walls 52A and 52B opposed to each other in the Y direction, and a bottom wall 52C and an upper wall 52D arranged to face each other in the Z direction (see FIG. 2A). The size of the through hole 56 is a size that allows ventilation from the inside of the room 24 to the outside (the space 34 under the stairs). As a result, the interior of the room 24 and the space below the staircase 34 are connected (connected) via the through hole 56.

  As an example, the flap 54 includes a cylindrical shaft portion 54A whose axial direction is the Y direction, and a rectangular plate-shaped portion 54B that extends radially outward from the outer peripheral surface of the shaft portion 54A. The shaft portion 54A is rotatably supported at both ends in the Y direction by using bearing members (not shown) provided on the side walls 52A and 52B. The plate-like portion 54B has, as an initial position when the return grill 50 is not used, a tip portion (an end portion opposite to the shaft portion 54A side) with respect to a horizontal plane H passing through the center of the shaft portion 54A. Are disposed at an inclination angle θ. As an example, the arrangement angle θ is 45 ° from the horizontal plane H in the clockwise direction.

  Further, as an example, four flaps 54 are provided in the grill main body 52 at intervals in the Z direction, and the arrangement angles of the flaps 54 are aligned by θ. Further, the length of the plate-like portion 54B in the radial direction of the shaft portion 54A is such that the tip of the plate-like portion 54B of the upper flap 54 is lower than the shaft portion 54A of the lower flap 54 at the initial position. It is the length to be placed. That is, the flaps 54 overlap each other when viewed in the X direction at the initial position and cover the through holes 56. Since the flaps 54 are inclined at the same arrangement angle θ, there is a gap in the Z direction. Thereby, ventilation (indicated by an arrow A) between the flaps 54 is possible.

  The rotation range of the shaft portion 54A is restricted by a stopper (not shown). For this reason, as an example, each flap 54 can change the arrangement angle θ with respect to the horizontal plane H in the range of 0 [°] ≦ θ ≦ 45 [°] in the clockwise direction. The arrangement angle θ = 0 [°] means that the plate-like portion 54B is arranged along the horizontal plane H, and the through hole 56 is in a fully open state (in an open state in which the amount of air flow is the largest). , The ventilation is indicated by arrow B) (see FIG. 4B).

  On the other hand, the flap 55 has, as an example, a cylindrical shaft portion 55A whose axial direction is the Y direction, and a rectangular plate-shaped portion 55B that extends radially outward from the outer peripheral surface of the shaft portion 55A. The shaft portion 55A is rotatably supported at both ends in the Y direction using bearing members (not shown) provided on the side walls 52A and 52B. The plate-like portion 55B has, as an initial position when the return grill 50 is not used, a tip portion (an end portion opposite to the shaft portion 55A side) with respect to a horizontal plane H passing through the center of the shaft portion 55A. Are disposed at an inclination angle θ. As an example, the arrangement angle θ is 45 [°] from the horizontal plane H in the counterclockwise direction.

  Further, as an example, four flaps 55 are provided in the grill main body 52 at intervals in the Z direction, and the arrangement angles of the flaps 55 are aligned by θ. Further, the length of the plate-like portion 55B in the radial direction of the shaft portion 55A is such that the tip of the plate-like portion 55B of the upper flap 55 is lower than the shaft portion 55A of the lower flap 55 at the initial position. It is the length to be placed. In other words, the flaps 55 overlap each other when viewed from the direction opposite to the X direction at the initial position, and cover the through holes 56. Since the flaps 55 are inclined at the same arrangement angle θ, there is a gap in the Z direction. Thereby, ventilation (indicated by an arrow A) between the flaps 55 is possible.

  The rotation range of the shaft portion 55A is regulated by a stopper (not shown). For this reason, as an example, each flap 55 can change the arrangement angle θ with respect to the horizontal plane H in the range of 0 [°] ≦ θ ≦ 45 [°] in the counterclockwise direction. Note that the arrangement angle θ = 0 [°] means that the plate-like portion 55B is arranged along the horizontal plane H, and the through hole 56 is in a fully open state (in an open state in which the amount of ventilation is the largest). , The ventilation is indicated by arrow B) (see FIG. 4B).

  Further, the four shaft portions 54A and the four shaft portions 55A are adjacently arranged in the X direction at the center of the grill body 52 in the X direction. The shaft portion 54A is rotated and moved in the clockwise direction by the drive portion 58 including the motor M, and the shaft portion 55A is rotated and moved in the counterclockwise direction by the drive portion 58. .

  That is, the four flaps 54 and 55 are symmetrically arranged so as to have an inverted V-shape on the XZ plane, with the axis of symmetry (not shown) at the center in the X direction of the grill body 52 as the center. Yes. And the arrangement | positioning angle (theta) is changed by the drive part 58 so that the four flaps 54 and 55 may be rotationally moved in the reverse direction mutually with the same variation | change_quantity (angle). Thereby, in the return grill 50, the air flow rate (flow rate) of the through hole 56 can be changed.

(Control part)
As described above, the operation mode information of the indoor unit 42 and the ON / OFF information of the pressure sensor 44 are input to the control unit 70 shown in FIG. Then, the control unit 70 outputs a command signal to the return grill 50 based on the input information, and controls the operation of the drive unit 58. The control unit 70 is included in an example of the ventilation amount changing unit.

  Specifically, as an example, when the mode of the indoor unit 42 is the Hi mode and the high pressure state is detected by the pressure sensor 44, the control unit 70 operates the drive unit 58 of the return grill 50 to operate the flaps 54, 55. (See FIG. 4A) is a fully open state (arrangement angle θ = 0 [°]). Further, the control unit 70 operates the flap 54, without operating the drive unit 58, when the indoor unit 42 is in the Lo, Me mode, or when the high pressure state is not detected by the pressure sensor 44. 55 (see FIG. 4A) is an initial position (arrangement angle θ = 45 [°]).

(Comparative example)
Next, an air conditioning system 200 of a comparative example will be described.

  As a comparative example, when the operation mode of the indoor unit 42 is the Hi mode and the pressure sensor 44 is ON, the air conditioning system 200 in which the arrangement of the flaps 54 and 55 in the return grill 50 remains at the initial position. Suppose there is.

  In the air conditioning system 200 of the comparative example, as shown in FIG. 6 (B), even if the pressure in the room 24 becomes a high pressure state, the ventilation amount in the return grill 50 does not increase. For this reason, in the air conditioning system 200 of the comparative example, part of the air A that flows toward the peripheral edge of the sliding door 35 and the sliding door 35 wraps around the ventilation portion 36 and flows toward the space 34 under the stairs. At this time, wind noise is generated by the air C flowing through the ventilation portion 36, but the wind noise cannot be reduced in the air conditioning system 200 of the comparative example.

(Function)
Next, the operation of this embodiment will be described.

  Control processing of the air conditioning system 40 executed by the control unit 70 will be described with reference to the flowchart of FIG. In addition, about the structure of the air conditioning system 40, it shall refer to FIGS. 1-4, and description of an individual figure number is abbreviate | omitted. The control unit 70 repeats this control process at a predetermined time period.

  In FIG. 5, in step S <b> 10, the operation of the air conditioning system 40 is turned on when the resident operates the controller 51. Then, the process proceeds to step S12.

  Subsequently, in step S12, the temperature T in the room 24 is detected by the temperature sensor 53 built in the controller 51, and the process proceeds to step S14.

  Subsequently, in step S14, the control board 42A compares the temperature T with the set temperature Ts to obtain a temperature difference ΔT = T−Ts. Then, the process proceeds to step S16.

  Subsequently, in step S16, it is determined whether or not ΔT = 0 [° C.] on the control board 42A. If ΔT is not substantially 0 [° C.], the indoor unit 42 starts operating, and the process proceeds to step S18. On the other hand, when ΔT is approximately 0 [° C.], the indoor unit 42 is not operated, and the process proceeds to step S20. In step S20, when the indoor unit 42 is operating, the operation of the indoor unit 42 is stopped. When the indoor unit 42 is not operating, the non-operating state (OFF state) is maintained. The control of the air conditioning system 40 is terminated.

  Subsequently, in step S18, one of the Lo mode, the Me mode, and the Hi mode is selected on the control board 42A in accordance with the magnitude of ΔT. Here, as an example, the Lo mode, the Me mode, and the Hi mode are selected in order from the smallest absolute value of ΔT. Then, the process proceeds to step S22.

  Subsequently, in step S22, the control unit 70 determines whether or not the operation mode of the indoor unit 42 is the Hi mode. In the case of the Hi mode, the process proceeds to step S24, and in the case of the Lo mode or the Me mode, the process proceeds to step S28.

  Subsequently, in step S24, the control unit 70 determines whether or not the pressure sensor 44 is ON. When the pressure sensor 44 is ON, the process proceeds to step S26, and when the pressure sensor 44 is OFF, the process proceeds to step S28.

  Subsequently, in step S26, the control unit 70 operates the drive unit 58 of the return grill 50 to rotate and move the flaps 54 and 55. Here, as an example, the flaps 54 and 55 are in a fully open state (a fully open state of the through hole 56). Then, the process returns to step S12.

  On the other hand, in step S28, the arrangement of the flaps 54 and 55 in the return grill 50 is set as the initial position. That is, in this step S28, since the wind noise is unlikely to be generated in the ventilation portion 36, the return grill 50 maintains the ventilation rate at the initial ventilation rate or from the state where the ventilation rate is high. Decrease the amount to a low state (initial state). Then, the process returns to step S12.

  Here, in the air conditioning system 40 of the present embodiment, in step S26, the control unit 70 opens the flaps 54 and 55 of the return grill 50 (see FIG. 4B). That is, the air flow rate in the return grill 50 is increased compared to the air flow rate in the return grill 50 (initial state) in the Lo and Me modes. For this reason, in the air conditioning system 40, as shown in FIG. 6A, the ratio of the air passing through the return grill 50 is higher than that of the ventilation portion 36, and the pressure in the room 24 is reduced. In other words, an increase in the air flow rate of the vent portion 36 is suppressed as compared with the air flow rate of the vent portion 36 in the Lo and Me modes. Thereby, generation | occurrence | production of the wind noise in the ventilation part 36 when ventilating in the room 24 with the indoor unit 42 can be suppressed.

  Further, in the air conditioning system 40, as described above, the Lo, Me, and Hi modes are switched in the control board 42A so that the temperature T detected by the temperature sensor 53 built in the controller 51 becomes the set temperature Ts. ing. As an example, during cooling, the control board 42A switches to the Hi mode when the temperature T is higher than the set temperature Ts and increases the amount of air blown by the indoor unit 42. Further, when the temperature T is equal to or lower than the set temperature Ts, the control board 42A switches to the Lo mode or the Me mode, or stops the operation to reduce the air flow rate. As a result, the indoor unit 42 is prevented from operating in the Hi mode with a large amount of air flow, and excessive (excessive) energy consumption in the operation of the indoor unit 42 is suppressed. Can be realized.

  Further, in the air conditioning system 40, the Hi mode in which the air flow is the largest among the plurality of operation modes of the indoor unit 42 is one of the conditions for the flaps 54 and 55 to operate (become fully open). For this reason, the flaps 54 and 55 do not operate (the operation for increasing the air flow rate is not performed) until the air volume of the indoor unit 42 is maximized. Thereby, in the air conditioning system 40, since unnecessary energy consumption due to unnecessary operations of the flaps 54 and 55 is suppressed, energy saving of the air conditioning system 40 can be realized.

  In addition, in the air conditioning system 40, the flaps 54 and 55 that change the air flow are provided in the grill main body 52, so that the flaps 54 and 55 are compared with the configuration in which the flaps 54 and 55 are provided in a different location from the grill main body 52. The space required for installing 55 is reduced. Thereby, the enlargement of the return grill 50 can be suppressed.

  Further, in the air conditioning system 40, the flaps 54 and 55 stop at the arrangement angle (for example, the arrangement angle θ = 0 [°]) at which the ventilation amount of the through-hole 56 is maximum, so that the gas passing through the through-hole 56 The resistance acting on (air) is the smallest (low pressure loss). Thereby, the pressure in the room 24 can be easily reduced.

  Further, in the air conditioning system 40, the flaps 54 and 55 are inclined so as to cover the through hole 56 when the indoor unit 42 is in the Lo mode or the Me mode and when the indoor unit 42 is not operating. Specifically, the flaps 54 and 55 are arranged in an inverted V shape. As a result, as shown in FIG. 4A, the flaps 54 and 55 block or reduce the progress of the light L in the X direction or the direction opposite to the X direction. Leakage of the light L to the outside and entry of the light L into the room 24 can be suppressed.

  Further, in the air conditioning system 40, the amount of air blown into the room 24 by the indoor unit 42 can be changed in three stages. Therefore, the operation mode of the indoor unit 42 is switched compared to a configuration in which the amount of blown air is changed in two stages. It is possible to suppress a sudden change in the amount of air flow.

  Further, in the air conditioning system 40, the gas (air) in the room 24 passes through the return grill 50 and flows into the space below the stairs where the indoor unit 42 is provided. Thereby, the air blown into the room 24 by the indoor unit 42 is returned to the indoor unit 42 and can be used, so that the air use efficiency in the indoor unit 42 can be increased.

  In addition, this invention is not limited to said embodiment.

  As shown in FIG. 1, a pressure sensor 44 is provided in the room 25, and a return grill 50 is provided on the partition wall 22 </ b> B that partitions the room 24 and the room 25, and the return grill 50 of the partition wall 22 </ b> B is controlled by the control unit 70. The operation may be controlled. Since the operation control of the return grill 50 of the partition wall 22B is the same as the operation control of the return grill 50 of the partition wall 22A, the description thereof is omitted.

  The installation of the return grill 50 is not limited to the first floor portion 12 but may be the second floor portion 14. For example, a pressure sensor 44 and a temperature sensor 53 (built in the controller 51) are provided in the room 27, and a return grill 50 is provided on the partition wall 22 </ b> C that partitions the staircase hall 30 and the room 27. The operation of the return grill 50 of the wall 22C may be controlled. In addition, when air-conditioning the second floor portion 14, the indoor unit 43 is used instead of the indoor unit 42.

  As an example, a suction chamber 62 that sucks air in the staircase hall 30 is connected to the indoor unit 43 via a return duct 64. The ceilings 19B of the rooms 27, 28, and 29 are provided with blowout chambers 66A, 66B, and 66C provided with blowout grills (not shown). The indoor unit 43 and the blowout chambers 66A, 66B, and 66C Are connected by blowing ducts 68A, 68B, 68C. As a result, when the indoor unit 43 operates in the Hi mode and the pressure in the room 27 becomes higher than the atmospheric pressure by the pressure sensor 44, the arrangement angle θ of the flaps 54 and 55 (see FIG. 4A) is set. What is necessary is just to make small and to increase the ventilation | gas_flowing amount of the return grill 50.

  Note that when the sliding door 35 of the room 24 is sufficiently open, the wind noise at the ventilation portion 36 hardly occurs, so the flaps 54 and 55 may be left in the initial position. In addition, the change in the air flow rate in the return grill 50 is not limited to two stages. For example, the air flow rate in the Me mode is larger than that in the Lo mode, and moreover in the Hi mode than in the Me mode. Three stages of increasing the air flow may be used.

  Moreover, the operation mode of the indoor units 42 and 43 is not limited to Lo, Me, and Hi, and may be an operation mode having four or more stages. The operation mode of the indoor units 42 and 43, which is one of the operation conditions of the return grill 50, is not limited to the maximum air flow rate mode, and may be, for example, the Me mode. Furthermore, when there is no sudden change in the air flow rate, the operation modes of the indoor units 42 and 43 may be only two stages of Lo and Hi.

  The air blowing means is not limited to the air blown by the fan, and may include, for example, a pump that pressurizes air and sends the air into each room. However, it is necessary to use a switchable air flow rate.

  The ventilation amount changing means is not limited to changing the arrangement angle θ of the flaps 54 and 55. For example, even if the aperture ratio of the plate material in which the through hole is formed (ratio of the opening area of the through hole to the area of one surface of the plate material) is changed using a shutter member that slides relative to the plate material. Good. Further, the arrangement angle θ of the flaps 54 and 55 is not limited to switching between 0 [°] and 45 [°], but may be set at another angle. Furthermore, the number of the flaps 54 and 55 is not limited to four, and may be 1, 2, 3, or 5 or more.

  The “wall constituting the room” provided with the ventilation amount changing means is not limited to the partition wall 22 that partitions the room, but includes a bottom wall (floor 17) and an upper wall (ceiling 19). is there.

  The plate-like portions 54B and 55B of the flaps 54 and 55 are not limited to those having a rectangular XZ cross section, but may have other cross sectional shapes such as a triangular shape, a spindle shape, and an elliptical shape in the XZ cross section. . Further, only the flap 54 or only the flap 55 may be used.

  Furthermore, in this embodiment, as an example, the operation mode of the indoor unit 42 is switched based on the temperature information from the temperature sensor 53 built in the controller 51. However, the resident is directly connected to the Lo by the controller 51. , Me, and Hi modes may be selected manually.

  In addition, in the present embodiment, the controller 51 and the temperature sensor 53 are separately provided in the building 10 (rooms 24 and 27 as an example) as shown in FIG. May be provided.

The predetermined set pressure in the pressure sensor 44 is not limited to the atmospheric pressure (1.01325 × 10 ⁵ [Pa]), and may be set with other pressure values.

10 Building 22 Partition wall (an example of a wall)
24 room 34 space under stairs (an example of another room)
40 Air-conditioning system 41 Outdoor unit (an example of air blowing means)
42 Indoor unit (example of blower)
43 Indoor unit (example of blower)
44 Pressure sensor (an example of pressure detection means)
50 return grill (an example of air flow change means)
52 Grill body (example of ventilation member)
53 Temperature sensor (example of temperature detection means)
54 Flap (an example of ventilation rate changing member)
55 flaps (example of ventilation rate changing member)
56 through-hole 70 control part (an example of ventilation | gas flow rate change means)

Claims (8)

A plurality of operation modes having different air blowing amounts can be switched, and air blowing means for blowing air into the room,
Pressure detecting means for detecting the pressure in the room;
Ventilation amount changing means provided on a wall constituting the room, and changing a ventilation amount from the inside of the room to the outside of the room based on the operation mode and the pressure;
Having air conditioning system. Temperature detecting means for detecting the temperature in the room is provided;
2. The air conditioning system according to claim 1, wherein the air blowing unit switches the plurality of operation modes so that a temperature detected by the temperature detection unit becomes a set temperature.   The air flow rate changing unit is configured to perform another operation when the pressure state detected by the pressure detection unit is in a high pressure state that is equal to or higher than a set pressure, and in the operation mode with the largest air flow rate among the plurality of operation modes. The air conditioning system according to claim 1 or 2, wherein the air flow is increased more than in the mode. The ventilation amount changing means is
A ventilation member formed with a through hole that allows ventilation from the inside of the room to the outside;
A ventilation amount changing member that is provided in the ventilation member so that the arrangement angle with respect to the ventilation member can be changed, and that changes the ventilation amount of the through hole by changing the arrangement angle;
The air conditioning system according to any one of claims 1 to 3, further comprising:   5. The air conditioning system according to claim 4, wherein the ventilation amount changing member stops at an arrangement angle at which the ventilation amount of the through-hole is maximized in an operation mode in which the ventilation amount is the largest among the plurality of operation modes.   The said ventilation | gas_flowing amount change member is inclinedly arranged so that the said through-hole may be covered, when the pressure state detected by the said pressure detection means is a low pressure state lower than the set pressure set. The air conditioning system described in. The air blowing means includes a first operation mode of a first air flow rate, a second operation mode of a second air flow rate greater than the first air flow rate, and a third air flow rate greater than the second air flow rate. Operation mode,
The air flow rate changing means is a state in which the pressure state detected by the pressure detecting means is a high pressure state that is equal to or higher than a set pressure, and the first operation mode and the second operation mode when in the third operation mode. The air conditioning system according to any one of claims 1 to 6, wherein the air flow is also increased. The air blowing means is provided in another room adjacent to the room,
The air conditioning system according to any one of claims 1 to 7, wherein the ventilation amount changing means is provided on a wall that partitions the room from the other room.

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