JP2020079665A - Air conditioning system - Google Patents

Abstract

To provide a technique for actualizing superior planned ventilation in a whole-building air conditioning system independently of an operating condition of an air conditioner.SOLUTION: An air conditioning system includes a ventilating air supply device for delivering outside air into a ventilating air supply duct corresponding to each area to form ventilating supply air, the air conditioner for delivering sucked air as air-conditioner supply air to an air-conditioner air supply duct corresponding to each area, an airflow control damper for individually controlling an amount of the air-conditioner supply air to be delivered to the air-conditioner air supply duct, and a combination part for combining the ventilating supply air with the air-conditioner supply air and supplying it as air-conditioning supply air via the air-conditioning air supply duct to a living space, the combination part having the ventilating air supply duct and the air-conditioner air supply duct connected at an upstream side and the air-conditioning air supply duct connected at a downstream side. With the flow of the air-conditioner supply air in the combination part as a main flow, a direction of the flow of the ventilating supply air is integrated with a direction of the main flow in the joint part from the rear.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system.

  In air conditioning of houses and buildings, various configurations have been devised to realize an air conditioning system for the entire building. It is expected that by using the whole building air conditioning system, various processes such as planned ventilation, heating and cooling, and air cleaning will be integrated to maintain a comfortable environment for 24 hours.

  FIG. 8 shows an example of the entire building air conditioning system. In the whole building air conditioning system 1, the outside air 501 is taken into the building by the ventilation air supply fan 212, the temperature and humidity are adjusted by the air conditioner 240, and the air conditioner air supply 503 is sent to the air conditioning air supply duct 245. The air-conditioning air supply 503 of the air-conditioning air supply duct 245 is sent to the room (private room 31a, LD31c) of the living space 30 in which air conditioning is performed via the branch air-conditioning air supply ducts 245a to 245c that branch into each room, and the air outlet. Air-conditioning air supply 506a to 506c is blown out from 310a to 310c. The air in each room moves through the undercuts 36a and 36b and the pavilion, and is sucked into the air conditioner 240 from the air conditioner suction port 320 in the room (corridor 31b) to be circulated and reused.

Air-conditioning control for each room in such a configuration can be performed by, for example, an air volume control damper arranged inside the outlet 310. Further, a similar air volume control damper may be arranged at the root of the branch air conditioning air supply ducts 245a to 245c for air conditioning air supply. Then, the user adjusts the opening of the air volume control damper and the air volume of the air conditioner, or automatically controls the damper opening and the air volume of the air conditioner according to the output of the temperature detector provided in each room. The environment can be adjusted for each room.
In the configuration of FIG. 8, the entire building air conditioning system can be operated, and the components such as the air conditioner and the ducts are mainly arranged in the ceiling space, so that the effect of improving the interior can be obtained.

  Further, Patent Document 1 (Japanese Patent No. 2734280) also discloses an air conditioner of a type in which the outside air sucked by an intake fan is adjusted by an air conditioner unit and supplied into the room.

On the other hand, a method of supplying ventilation air supply to the air conditioner outlet side has been devised instead of the method of supplying ventilation air supply to the air conditioner intake side.
For example, in the entire building air conditioning system described in Patent Document 2 (Japanese Patent Laid-Open No. 11-294839), a configuration is adopted in which main ventilation and indoor ventilation ducts are connected to ventilation ventilation sub-ducts for the number of rooms connected to each room. ing. Further, a flow rate adjusting mechanism is provided at the connecting portion. As a result, the air conditioned by the air conditioner and the ventilation air are mixed in the sub-duct at a desired ratio and supplied to each room.

  In addition, in Patent Document 3 (Japanese Patent No. 5762317), a ventilation air supply that is sucked from the outside and sent to the inside of the room and a supply air that is taken in from the room and adjusted by an air conditioner and then circulates in the room merge. There is disclosed an air conditioner including an air passage merging section. In Patent Document 3, by using a non-electric type gravity-use shutter in a portion where ducts of each air passage are connected to an air passage merging portion, special air volume control of an air conditioner and interim fan operation are unnecessary. There is.

The entire building air conditioning system can be suitably used for a building having a double floor structure. For example, Patent Document 4 (Japanese Patent No. 5137599) discloses a floor blow-out type air conditioning system in which an underfloor space of a double floor is used as an air supply path and air is blown into the room from a floor air outlet provided on the floor of each room. Disclosure. By using the underfloor space as the air supply path of the air conditioner in this way, it is possible to improve energy efficiency compared to general floor heating and to produce comfort with a small temperature difference due to radiant heat from the floor. Especially, in an apartment house where the ceiling space is narrow and the installation of ducts is often restricted by beams, the use of the underfloor space is advantageous in that the air-conditioning air supply duct to each room can be omitted.

Japanese Patent No. 2734280 JP-A-11-294839 Japanese Patent No. 5762317 Japanese Patent No. 5137599

Some problems have been pointed out in the case where the whole building air conditioning system is configured by the conventional method of supplying ventilation air to the air conditioner intake side as shown in Patent Document 1 and FIG. First, for the purpose of planned ventilation in the middle period where air conditioning is not required, special control is required to make the air volume of the fan in the air conditioner equal to or higher than the air volume of the ventilation air supply fan. In addition, when performing air conditioning, special control is required to adjust the fan in the air conditioner according to the opening of the air volume control damper.
Due to these factors, it becomes necessary to use a dedicated device or part as a component of the air conditioning system for the whole building (for example, ventilation air supply fan, air conditioner, main remote controller, temperature controller, air volume control damper, etc.). As a result, there are problems that the degree of freedom in design is lowered and the cost is increased. In addition, since it is necessary to operate the fan in the air conditioner all year round, there is a problem that extra air carrying energy is consumed.
In particular, in the case of the configuration as shown in FIG. 8, there is a problem that the air outlet in each room is near the ceiling, so that it is cold at the time of heating and that the air that hits the body is uncomfortable due to air conditioning using only the air flow. Further, as described above, in the configuration of FIG. 8, since the air-conditioning air supply duct of each room is installed in the ceiling, there is a problem that it is difficult to apply to an apartment house where the ceiling space is narrow and the installation of ducts is often restricted by beams. there were.

Problems have also been pointed out regarding the type of technology that supplies ventilation air to the air conditioner outlet side.
For example, as shown in Patent Document 2, when a main duct is connected to ventilation/air-conditioning sub-ducts for the number of rooms and a flow rate adjusting mechanism is provided, the amount of air supply duct increases considerably. In addition, a flow rate adjustment mechanism of "the number of rooms x 2" is required. In addition, a dedicated air conditioner or control unit with a special automatic control function to increase or decrease the fan air volume according to the adjustment degree of the flow rate adjusting mechanism is required.
Therefore, the cost is increased due to the increase in the number of members and the manufacture of dedicated parts. In addition, the problem of squeezing the space in the ceiling is not solved, and it becomes a problem particularly when applied to an apartment house.

Further, in the air conditioner shown in Patent Document 3, which includes the air passage merging portion where the ventilation air supply and the air conditioner supply air merge, a movable shutter that opens and closes by wind force is used at the merging portion, and thus there is a risk of failure. is there. In addition, when maintaining, repairing, or replacing such parts, install a ceiling inspection port or secure an inspection space in the ceiling, etc., in order to access the installation position of the parts and work. Action is necessary. As a result, there are problems that the space inside the ceiling is compressed and that the ceiling inspection port restricts the ceiling lighting plan.
In addition, the gravity type shutter has a restriction on the vertical installation, which may cause a mistake in mounting the equipment during construction. In addition, especially in narrow ceiling spaces in apartments,
There is a possibility that it becomes difficult to design the duct for the air duct confluence pipe and the duct to be attached to it, the bending of the duct increases, the pressure loss increases, and a mistake in duct installation during construction occurs. Further, since it is assumed that the planned ventilation and the air volume of the air conditioner are different for each house, the manufacturer needs to manufacture the air passage merging pipes having various combinations of the connecting duct diameters, which causes an increase in cost.
Further, the method of Patent Document 3 does not support adjustment of the air conditioning capacity for each room or each area.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a technology for performing good planned ventilation in an entire building air conditioning system regardless of the operating state of the air conditioner.

In order to achieve the above object, the present invention employs the following configurations. That is,
An air conditioning system for supplying air conditioning air supply in which ventilation air supply and air conditioner air supply are combined to each of a plurality of areas included in a living space,
A ventilation air supply device that sends the outside air taken in to a plurality of ventilation air supply ducts corresponding to each of the plurality of areas, and makes the ventilation air supply.
An air conditioner that adjusts the air sucked from the living space to supply air to the air conditioner, and sends the air conditioner air supply to a plurality of air conditioner air supply ducts corresponding to each of the plurality of areas,
A plurality of air volume control dampers that individually control the air volume of the air conditioner supply air sent to the plurality of air conditioner air supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, in which the ventilation air supply and the air conditioner air supply are combined to form the air conditioning air supply, and the air conditioning supply air is supplied to the living space through an air conditioning air supply duct. Part,
On the upstream side, the ventilation air supply duct and the air conditioner air supply duct in which the corresponding area is the same as the merging portion are connected,
On the downstream side, the corresponding area is the same as the confluence section, an air conditioning air supply duct for supplying the air conditioning air supply to the living space is connected, a confluence section,
Is equipped with
When the flow of the air conditioner supply air from the air conditioner air supply duct toward the air conditioner air supply duct is the main flow, the flow of the ventilation air supply in the direction of the main flow is It is an air-conditioning system characterized by the fact that the directions are merged from the rear.

With such a configuration, the planned ventilation and air conditioning of the entire building air conditioning system can be suitably performed for each area, and sufficient planned ventilation can be performed even when the air conditioner is stopped.
In the above configuration, in the confluence portion, the main flow direction and the ventilation/supply air flow direction may meet at an acute angle.

The present invention also employs the following configurations. That is,
An air conditioning system for supplying air conditioning air supply in which ventilation air supply and air conditioner air supply are combined to each of a plurality of areas included in a living space,
A ventilation air supply device that sends the outside air taken in to a plurality of ventilation air supply ducts corresponding to each of the plurality of areas, and makes the ventilation air supply.
An air conditioner that adjusts the air sucked from the living space to supply air to the air conditioner, and sends the air conditioner air supply to a plurality of air conditioner air supply ducts corresponding to each of the plurality of areas,
A plurality of air volume control dampers that individually control the air volume of the air conditioner supply air sent to the plurality of air conditioner air supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, in which the ventilation air supply and the air conditioner air supply are combined to form the air conditioning air supply, and the air conditioning supply air is supplied to the living space through an air conditioning air supply duct. Part,
On the upstream side, the ventilation air supply duct and the air conditioner air supply duct in which the corresponding area is the same as the merging portion are connected,
On the downstream side, the corresponding area is the same as the confluence section, an air conditioning air supply duct for supplying the air conditioning air supply to the living space is connected, a confluence section,
Is equipped with
The ventilation air supply duct is configured such that, when the air conditioner is stopped and the ventilation air supply device is operating, substantially the entire amount of the ventilation air supply is delivered to the air conditioning air supply duct side. The air conditioning system is characterized by being connected to the merging portion.

  With such a configuration, planned ventilation and air conditioning of the entire building air conditioning system can be suitably performed for each area, and sufficient ventilation can be performed even when the air conditioner is stopped.

Further, the air flow control damper may be configured to include a fully closed prevention mechanism. As a result, the cost can be reduced by using a general-purpose air conditioner.
Further, a configuration may be adopted in which a remote indicator is further provided, and the air volume control dampers are individually controlled based on instruction information from the remote indicator. As a result, good control can be performed for each area and each room. Alternatively, a manual remote controller for adjusting the opening of the air volume adjustment damper may be provided.
Further, the ventilation air supply device, the air conditioner and the merging portion are arranged in a ceiling space, and the air conditioning air supply duct may be configured to send the air conditioning air supply from the ceiling space to the underfloor space. Good. As a result, it is possible to enjoy various advantages of the air conditioning system using the floor blowing method.
Further, a differential pressure damper is further provided, one of the differential pressure dampers is connected to a position closer to the air conditioner in the air conditioner air supply duct than the air volume control damper, and the other of the differential pressure dampers is the suction of the air conditioner. You may employ|adopt the structure connected to the side. As a result, the air conditioning system can be operated more stably and continuously.

  According to the present invention, it is possible to provide a technique for performing good planned ventilation in an entire air conditioning system regardless of the operating state of the air conditioner.

It is a figure which shows the structure of the building provided with an air conditioning system. It is a figure explaining the joining of ventilation supply air. It is a schematic diagram which shows a mode that air joins with a ventilation supply air joining pipe. It is a schematic diagram which shows a mode that air joins with a ventilation supply air joining pipe. It is a schematic diagram which shows a mode that air joins with a ventilation supply air joining pipe. It is a schematic diagram which shows the comparative example of the joining of the air in a ventilation supply air joining pipe. It is a graph which shows the relationship of the merging angle of the ventilation air supply to a ventilation air supply merging pipe, and an air-conditioning air supply rate. 6 is a block diagram illustrating control in the second embodiment. FIG. It is a partially enlarged view of the air conditioning system of Embodiment 3. It is a figure which shows the structure of the building provided with the air conditioning system concerning background art.

Preferred embodiments of the present invention will be described below with reference to the drawings. However, the constituent blocks and their relative arrangements described below should be appropriately changed according to various conditions of the system to which the invention is applied, and the scope of the invention is limited to the following description. Not a thing.

  INDUSTRIAL APPLICABILITY The present invention can be preferably applied to an air conditioner and an air conditioning system, a building including them, and a control method thereof. The present invention can also be regarded as a program that operates using the computing resources of the information processing apparatus and causes the information processing apparatus to execute each step of the control method, and a computer-readable storage medium that stores the program. .. The storage medium may be a non-transitory storage medium.

[Embodiment 1]
FIG. 1 is a schematic diagram for explaining an example of the configuration and arrangement of the present embodiment, and shows a cross section of one section assuming one dwelling unit of an apartment house in one floor of a building. The technique of the present embodiment can be applied to various buildings such as offices, public facilities, and detached houses, as well as apartment houses.

(Overall structure)
In FIG. 1, the sections to be air-conditioned are roughly: a lower boundary surface 21 that is a boundary with a lower floor, an upper boundary surface 11 that is a boundary with an upper floor, a wall surface 33 that is a boundary with an adjacent room or outside the building. It is the area separated by. The lower boundary surface 21 is an upper surface of a structure such as a floor slab, a heat insulating material laid on the upper surface, or the like. The upper boundary surface 11 is a lower surface of a structure such as a ceiling slab, a heat insulating material installed below the lower surface. The wall surface 33 is made of a structure such as a wall material, and the wall material may double as a wall surface of an adjacent room or an outer wall of a building.

The interior of the room is divided into a ceiling space 10 above the ceiling 12, an underfloor space 20 below the double floor 22, and a living space 30 between the ceiling 12 and the double floor 22 in the height direction. The living space 30 is an area in which a resident is active, and is a target space for adjusting the environment such as temperature. Various components of the entire building air conditioning system 1 are arranged in the ceiling space 10.
Ceiling 12, double floor 22, and wall 33 need not be horizontal or vertical. For example, the ceiling of the private room 31a or the LD 31c in which the resident is mainly active may be relatively high, and the ceiling of the corridor 31b may be relatively low. As a result, it is possible to secure a large space for arranging the air conditioner and the duct in the ceiling above the corridor. Further, the ceiling 12, the double floor 22, and the wall surface 33 may have a step, a protrusion, a recess, or the like in part. For example, when arranging the air-conditioning air supply duct 249 from the ceiling space 10 to the underfloor space 20, a cover may be provided to hide the duct.

In this embodiment, a floor blow-out type air conditioning system is used. Therefore, the air conditioned by the air conditioner 240 and the like in the ceiling space 10 moves to the underfloor space 20 through the duct, and then is sent out to each room from the floor outlet 340. The underfloor space 20 is formed between a lower boundary surface 21 and a double floor 22 installed above the lower boundary surface 21 using support legs or the like. A heat insulating material may be laid on the lower boundary surface 21 and the wall surface 33 of the underfloor space 20.
In the present embodiment, the partition 20c is provided to divide the underfloor space into two areas (underfloor spaces 20a and 20b). As a result, the air conditioning capacity can be controlled individually for each room and each area.
By using the floor blowing type air conditioning system as in the present embodiment, radiant air conditioning (radiation air conditioning) from the floor surface is possible by the heat of the air conditioning air supply moving in the underfloor space 20 being transferred to the double floor 22. Become. By using radiant air conditioning, for example, it is possible to reduce the cold at the feet when heating, create an air-conditioned environment with little temperature unevenness, and reduce the discomfort that the airflow hits the body.
It is also preferable that the opening area of the floor outlet can be adjusted. As a result, the amount of air-conditioning air supply can be adjusted, so that it is possible to flexibly meet different heating and cooling demands for each room or area, or for each room or area. In particular, it is possible to realize personal air conditioning when there are a plurality of outlets in the room.
However, the use of the floor blowing type air conditioning system and the control for each room are not always essential.

(Ventilation and air conditioning)
Regarding the planned ventilation, the whole building air conditioning system 1 takes in the outside air 501 into the building, and sends it out to the ventilation air supply duct 243 by the ventilation air supply fan 212 of the ventilation air supply device 210 to obtain the ventilation air supply 502 in FIG. In the present embodiment, the ventilation air supply duct 243 is branched downstream to become the ventilation air supply ducts 243a and 243b. The respective branched ventilation air supply ducts 243a and 243b correspond to the respective areas of the underfloor spaces 20a and 20b. The branch configuration of FIG. 1 is an example, and an appropriate number of divisions can be adopted according to the number of air-conditioned areas. Further, if it is not necessary to divide the air-conditioned area, the branch may not be provided. Furthermore, even if the ventilation air supply fan is a simultaneous air supply/exhaust type ventilation unit in which a ventilation exhaust fan is integrated in the same unit, it is a heat exchange type ventilation unit in which a heat exchange structure is further integrated. Alternatively, the heat exchange structure may be a heat exchange system using a heat pipe, a heat pump, or a moisture absorbing/releasing material in addition to the static heat exchange element or the rotary heat exchange rotor.

  The entire building air conditioning system 1 uses the air conditioner 240 to perform air conditioning. The air conditioner 240 is usually called an air conditioner indoor unit, and typically includes an air conditioner fan 242 and a heat exchanger illustrated in the air conditioner 240, and a control device and the like not illustrated. Further, in addition to the duct connected to the air conditioner 240, an outdoor unit including a compressor, an expansion valve, a heat exchanger, and the like, and a refrigerant pipe connecting the outdoor unit and the air conditioner 240 are provided. Is an air conditioner that adjusts. The air conditioner 240 may further have a function of adjusting the air condition such as dust removal and air purification. The air conditioner 240 sucks air from the suction port 320 in the corridor 31b, adjusts the temperature and the like to make air conditioner air supply 503, and sends it out to the subsequent air conditioner air supply duct 247 for circulation by the air conditioner fan 242. Regarding the air conditioner air supply duct 247, the air conditioner air supply ducts 247a and 247b are branched at the downstream side according to the number of areas and the number of rooms in the underfloor space 20.

  Each of the air conditioner air supply ducts 247a and 247b is provided with air volume control dampers 350a and 350b whose air volume changes according to the opening degree. The air volume control damper 350 changes the opening degree according to a control signal from the controller or by manual control. It is possible to adjust the amount of air supply supplied to each branch duct according to the opening degree of the air volume control damper. Then, the air-conditioner supply air whose air volume has been controlled merges with the ventilation supply air, and then is sent to each area. That is, in the present embodiment, the air conditioner air supply rate for each area is changed without performing detailed control of the air conditioner fan, and environmental adjustment for each area is executed. The air volume of the air conditioner fan may be adjusted together with the damper opening control. The air volume control damper is arranged at any position of the air conditioner air supply duct, for example, at an end portion (position close to the ventilation air supply/merging pipe) or an intermediate portion.

  Preferably, the air volume control damper 350 may have a function of preventing the total closure using a stopper or the like. As a result, it is possible to prevent a situation where the air conditioner air supply outlet is blocked and the minimum air volume required for stable operation of the air conditioner cannot be secured. As a result, the outlet of the air conditioner will not be blocked during the air conditioning operation of the air conditioner, and a general-purpose air conditioner can be used as the air conditioner 240, leading to cost reduction.

Then, the ventilation/air supply confluence pipes 248a and 248b are arranged on the downstream side of the ventilation/air supply and the air-conditioner air supply. The ventilation air supply duct 243a and the air conditioner air supply duct 247a, and the ventilation air supply duct 243b and the branch air conditioner air supply duct 247b are respectively connected to the ventilation air supply air confluence pipes 248a and 248b, and the respective air supply air is supplied in the ventilation air supply air confluence pipes. Will join. The ventilation air supply air 502 and the air conditioner air supply 503 join together in the ventilation air supply air merging pipes 248a and 248b to become air conditioning air supply airs 506a and 506b. The air-conditioning air supply 506a, 506b reaches each area of the underfloor space 20 through the air-conditioning air supply ducts 249a, 249b provided for each area, and is sent into the room from the floor outlets 340a to 340c. At this time, in addition to the method of dividing the underfloor space 20a into the two areas of the underfloor spaces 20a and 20b by the partition 20c, a majority of the air conditioning and air supply air ducts 249a and 249b are under the floor blowing of the target area. An air flow direction adjusting plate may be provided at the exit portion of the air conditioning/air supply duct 249 so as to be fed into the exits 340a, 340b+340c. Further, a plurality of air-conditioning air supply ducts 249a and 249b may be bundled and arranged along the wall, and a cover that covers the whole may be provided. The ventilation/air supply merging pipe corresponds to the merging portion of the present invention.

  The air-conditioning supply air blown into each room moves through the undercuts 36a and 36b, the path gallery, and the like, and is sucked into the air conditioner 240 from the suction port 320.

  Thus, in the present embodiment, the air conditioner air supply duct 247 of the air conditioner is provided with the air volume control damper 350 and the ventilation air supply/merging pipe 248 in order from the air conditioner 240 side (the upstream side of the air conditioner air supply). Further, when viewed from the side of the ventilation/air supply fan 212, the ventilation/air supply confluence pipe 248 is installed on the downstream side of the ventilation/air supply duct 243 (the direction in which the ventilation/air supply advances). Further, an air conditioning air supply duct 249 is connected to the downstream side of the ventilation air supply confluence pipe 248 (the direction in which the air conditioning air supply in which the air conditioning air supply and the ventilation air supply are combined advances).

(Method of joining air-conditioner air supply and ventilation air supply)
Next, a method for joining the air conditioner air supply and the ventilation air supply so that sufficient planned ventilation is performed even when the air conditioner 240 is stopped will be described.
The flow of the air-conditioning air sent from the air-conditioner 240 toward the downstream side (air-conditioning air supply side) in the ventilation air supply confluence pipe 248 is referred to as a “main flow”. That is, the main flow is an air conditioner air supply flow in the ventilation air supply/merging pipe from the air conditioner air supply duct 247 to the air conditioning/air supply duct 249 through the ventilation/air supply/merging pipe 248. The direction of the air-conditioner air supply flow in the ventilation air supply/merging pipe 248 corresponds to the direction of the main flow.
As will be described in detail below, in the present invention, when the ventilation supply air merges with the air conditioning supply air in the ventilation supply air confluence pipe, the ventilation supply air flow merges with the main flow from the rear. Here, the “merge from the rear” means that the angle at which the main flow and the ventilation/supply air flow merge is smaller than a right angle. That is, in the case of the first case where there are no three-dimensionally opposite components in the direction of the main flow and the direction of the ventilation/supply air flow entering the ventilation/supply air confluence pipe, and the two flows merge in the ventilation/supply air confluence pipe. , The main flow and the ventilation/air supply flow form a converging angle of an acute angle. By configuring the duct connection part of the ventilation/air supply confluence pipe to have such a confluence angle, the ventilation/air supply entering the ventilation/air supply confluence pipe can flow back to the upstream side of the air conditioning air supply flow even when the air conditioner is stopped. Instead, most (preferably substantially all) of the ventilation air supply can be sent to the air conditioning air supply side.

FIG. 2 shows a configuration example of the ventilation/air supply/merging pipe 248 for realizing the above-described airflow confluence. In this figure, the ventilation/air supply duct 243 enters the ventilation/air supply/merging pipe 248 before the ventilation/air supply reaches the merging position, but the ventilation/air supply duct 243 may extend to the merging position.
FIG. 2A shows a case where the main flow 532 is substantially linear. Since the ventilation air supply duct 243 is connected to the ventilation air supply confluence pipe 248 at an acute angle, the ventilation air supply can join the main flow at an acute angle.

  FIG. 2B shows an example of another duct pipe, and the main flow 532 flowing from the air conditioner air supply duct 247 to the air conditioning air supply duct 249 is also bent because the ventilation air supply/merging pipe is bent. . Even in this case, the directions of the air-conditioner supply air flow and the ventilation air-supply flow flow at the merging position meet at an acute angle.

Subsequently, with reference to FIGS. 2C to 2E, conditions of the merging angle of the airflows will be described with various duct shapes as materials.
Similar to FIG. 2A, FIG. 2C shows a case where the direction from the air-conditioning air supply to the air-conditioning air supply is substantially linear. In the figure, reference numeral 252a indicates a confluence position of ventilation/air supply in the ventilation/air supply confluence pipe. That is, the ventilation air supply 502 joins the main flow 532 at the joining position 252a. When the ventilation air supply 502 merges with the main flow in the direction indicated by reference numeral 502a, it corresponds to the merging from the rear, so most of the ventilation air supply can be sent to the room of the air conditioning ventilation target even when the air conditioner is stopped. The room is fully planned and ventilated (hereinafter, there is no problem in ventilation is indicated by "○" above the code). Even when the vehicle merges in the direction of reference numeral 502b, the merge angle becomes an acute angle, so that sufficient planned ventilation is performed even when the air conditioner is stopped. On the other hand, in the case of merging in the direction of the reference numeral 502c, when the air conditioner is stopped, a certain amount of ventilation air flows back to the upstream side (air conditioner air supply duct side). Indicated) does not provide sufficient planned ventilation.

  Therefore, in the case of FIG. 2C, the preferred direction of merging is between the reference numeral 502a and the reference numeral 502b. In this way, when the vehicles join from the rear or join at an acute angle, in other words, when they join at an angle smaller than a right angle, sufficient planned ventilation is performed even when the air conditioner is stopped. Note that in the case of this figure, when the pipe cross section of the connection part of the air conditioning air supply duct on the downstream side of the ventilation air supply confluence pipe is assumed, the ventilation air supply merges from the upstream side of the vertical plane, and the air conditioner stops. Sufficient ventilation at times can be realized.

In the case of FIG. 2D, the ventilation/air supply confluence pipe 248 is bent, and its angle is smaller than a right angle. The path of the main flow 532 in the ventilation-air confluence pipe is considered to be approximately linear.
In the figure, reference numeral 252b indicates one confluence position, and reference numerals 502d to 502f indicate examples of the direction of the ventilation air supply 502 at the confluence position 252b. Further, reference numeral 252c indicates another confluence position, and reference numerals 502g to 502i indicate examples of the direction of the ventilation air supply 502 at the confluence position 252c.
With respect to the merging position 252b, the preferred merging direction is between reference numeral 502d and reference numeral 502e. Further, regarding the merge position 252c, the preferable direction of the merge is between the reference numeral 502g and the reference numeral 502h. On the other hand, when the direction is 502f or 502i, the backflow of ventilation air may occur when the air conditioner is stopped.

In the case of FIG. 2( e ), the ventilation/air supply confluence pipe 248 is bent at a substantially right angle. The main flow 532 in the ventilation/air supply/merging pipe proceeds along the bend.
In the figure, reference numeral 252d indicates one confluence position, and reference numerals 502j to 502l indicate examples of directions of the ventilation air supply 502 at the confluence position 252d. Further, reference numeral 252e indicates another merging position, and reference numerals 502m to 502o indicate examples of the direction of the ventilation air supply 502 at the merging position 252e.
With respect to the merging position 252d, the preferred merging direction is between the reference numeral 502j and the reference numeral 502k. Further, regarding the merge position 252e, the preferred direction of the merge is between the reference numeral 502m and the reference numeral 502n. On the other hand, if the orientation is reference numeral 5021 or reference numeral 502o, backflow of ventilation air may occur when the air conditioner is stopped.

(Schematic diagram of the air flow in the ventilation/air supply confluence pipe)
The flow of air in the ventilation/air supply confluence pipe 248 will be further described with reference to the schematic diagrams of FIGS. 3A to 3C. In FIGS. 3A to 3C, the confluence angle of the ventilation air supply with the air supply of the air conditioner is 45°, and it can be said that they are confluent from behind or at an acute angle. 3A to 3C are schematic diagrams showing the results of numerical fluid analysis of the pipe central cross-section flow around the ventilation/air supply confluence pipe when the operating states of the ventilation/air supply fan 212 and the air conditioner 240 are changed. The air flow rate is represented by the thickness and length of the arrow.

FIG. 3A shows a state in which both the air conditioner fan 242 and the ventilation air supply fan 212 are operating, and corresponds to the operation at the time of operating the cooling and heating. At this time, the air conditioning air supply duct 24
7 and the ventilation air supply duct 243 are both mechanical air supply, and the total of both is the air-conditioning air supply duct air volume. For example, the air flow rate ratio of each flow in this simulation is 6.25 for the air-conditioning air supply and 7.25 for the air-conditioning air supply with respect to 1 for the ventilation air supply. Therefore, when both units are in operation, all of the airflow entering the air supply confluence pipe exits from the downstream side (air conditioning air supply duct side), so that the air conditioning air supply that performs the air conditioning by the planned ventilation and the air conditioner is appropriate for the living space. Supplied.

FIG. 3B shows a state in which the air conditioner fan 242 is stopped and only the ventilation air supply fan 212 is operating, which corresponds to a case where the air conditioner fan 242 is stopped because cooling/heating is unnecessary in the middle period or the like. Since the merging angle is an acute angle, the ventilation air supply 502 advances to the downstream side (air conditioning air supply duct side) when blown out at the merging position. As a result, almost all of the ventilation air supply proceeds to the air conditioning air supply duct side.
At this time, a forward flow is generated in the air-conditioner air supply duct by being attracted by the flow of the ventilation/air supply in the ventilation/air supply merging pipe. For example, the air flow rate ratio of each flow in this simulation is 0.66 in the forward flow of the air-conditioning air supply to 1 of the ventilation air supply, and 1.66 in the air-conditioning supply air on the downstream side. Since there is a small amount of the forward flow due to the attraction, and the intake air of the air conditioner in the living space is supplied to the room, there is almost no problem in ventilation and air conditioning. Therefore, planned ventilation can be appropriately implemented.

  FIG. 3C shows a state in which the ventilation air supply fan 212 is stopped and the air conditioner fan 242 is operating. Normally, this kind of operation is not done, but it may be done temporarily. Since the connection angle is an acute angle, almost all the air-conditioner air supply flows to the air-conditioning air supply duct side. Therefore, the living space can be appropriately cooled and heated. Although a small part of the air supply to the air conditioner flows back through the ventilation air supply duct 243 and leaks out, there is almost no functional problem in the air conditioning of the entire building, and there is no waste of the air supply after air conditioning to the outside. For example, the air flow rate ratio of each flow in this simulation is 0.988, which is almost the total amount of air conditioning air supply to 1 inside the air conditioning air supply duct. The backflow into the ventilation air supply duct is only -0.012.

  FIG. 4 shows a comparative example with different merging angles. The angle of connection between the ventilation/air supply duct 243 and the main flow direction of the ventilation/air supply confluence pipe in FIG. 4 is substantially a right angle. Therefore, when there is a certain amount of air-conditioner air supply, the flow of air-conditioner air supply is the main flow direction toward the air-conditioning air supply side in the ventilation confluence pipe and the direction of the ventilation air supply air at the ventilation air supply confluence outlet. , Join at 90°. Similar to FIG. 3B, FIG. 4 shows a state in which the air conditioner fan 242 is stopped and only the ventilation/air supply fan 212 is operating. In the case of this figure, unlike FIG. 3B, most of the ventilation air supply flows back to the air-conditioner air supply duct side and leaks out. Regarding the air flow rate ratio of each flow in this simulation, the forward flow to the air conditioning air supply duct side is 0.40, and the backflow to the air conditioner air supply duct side is -0.60, for ventilation air supply of 1. Therefore, in the connection method of FIG. 4, planned ventilation when the air conditioner is stopped does not work well.

FIG. 5A is a graph showing the "air conditioning air supply rate (vs. ventilation air supply)" at various confluence angles of the ventilation air supply in the ventilation air supply confluence pipe. "Air-conditioning air supply ratio (vs. ventilation air supply)" is the ratio of the air-conditioning air supply volume after merging to the ventilation air-supply air volume when only the ventilation air-supply fan is operating and the air-conditioning fan is stopped. Is. That is, when the air conditioning air supply rate (vs. ventilation air supply) exceeds 1, it indicates that the air conditioning air supply air volume is larger than the ventilation air supply air volume, and the planned ventilation functions smoothly. Further, FIG. 5(a) assumes an air conditioner stop state such as an intermediate period, and corresponds to FIG. 3B when the angle is 45° and to FIG. 4 when the angle is 90°.
The air-conditioning air supply rate (vs. ventilation air supply) is expressed by the following equation (1).
Air-conditioning air supply rate (against ventilation air supply) = Air-conditioning air supply duct air volume/Ventilation air supply duct air volume... (1)
From FIG. 5A, it was found that the planned ventilation functioned sufficiently if the confluence angle was an acute angle smaller than a right angle.

FIG. 5B is a graph showing the “air conditioning air supply rate (vs. air conditioning air supply)” at various merging angles of the ventilation air supply merging pipe. "Air-conditioning air supply rate (vs. air-conditioning air supply)" is the ratio of the air-conditioning air supply after merging to the air-conditioning air supply when only the air-conditioning fan is operating and the ventilation air supply fan is stopped. Is. Therefore, the case where the angle is 45° corresponds to FIG. 3C. The air-conditioning air supply rate (air conditioner air supply) is expressed by the following equation (2).
Air conditioning air supply rate (air conditioner air supply) = air conditioning air supply duct air volume/air conditioner air supply duct air volume (2)

  From FIG. 5B, it can be seen that regardless of the merging angle, almost all the air-conditioner air supply flows to the air-conditioning air supply duct side, and the air-conditioning target can be cooled and heated with a sufficient function. It should be noted that although a small part of the air supply to the air conditioner flows back to the ventilation air supply duct side, it does not affect the planned ventilation and cooling and heating.

  From these simulations, it is confirmed that the air flow direction in the connecting pipe from the ventilation air supply duct to the ventilation air supply confluence pipe is in the forward flow direction in the ventilation air supply air confluence pipe to the main flow direction in which the air conditioner air supply flows toward the air conditioning air supply. For example, it is possible to send the ventilation air supply air volume or the air conditioning air supply air volume as planned or above the plan to the air conditioning air supply duct regardless of whether the ventilation air supply fan and the air conditioner fan are operating or stopped. As a result, planned ventilation and cooling and heating are performed appropriately.

(effect)
According to the configuration of the present embodiment, planned ventilation can be realized without the need to operate the air conditioner fan in the intermediate period when air conditioning is not performed. Therefore, reduction of operating cost and prevention of failure can be expected. In addition, even during the time of heating and cooling, by operating the air volume control damper installed on the air supply side of the air conditioner, the air conditioning air supply that integrates planned ventilation and air conditioning processing can be integrated into the living space without complicated control of the air conditioning fan. The occupants can be provided with a suitable environment by adjusting the sending and air conditioning capacity.
Further, by providing the air conditioner air supply duct, the ventilation air supply duct, and the air conditioning air supply duct for each area, the air conditioning air supply to a plurality of areas can be easily controlled individually.
Furthermore, if the air volume control damper is equipped with a fully closed prevention function, it is possible to secure the minimum air volume necessary for stable operation of the air conditioner without blocking the air supply of the air conditioner. Air conditioners can be used, which leads to cost reduction.

  Further, in the configuration of this embodiment, the ventilation/air supply confluence pipe has no movable portion. Therefore, unlike the case where the self-weight type shutter is used, no failure occurs, and there is no need for a ceiling inspection port for inspection, maintenance or replacement of parts and a maintenance inspection space inside and outside the ceiling. As a result, in particular, even in a situation where the space inside the ceiling space is limited, such as in an apartment house, construction is possible or easy, and the degree of freedom in duct arrangement is increased. Further, since the constituent members of the merging portion can be only ducts having different diameters, manufacturing is easy.

  Further, by providing a double floor structure as in the present embodiment and supplying the air-conditioning air supply generated by the air conditioner 240 and the like in the ceiling space to the room from the floor outlet through the underfloor space, floor radiation and airflow are used together. It is possible to realize air conditioning throughout the building with excellent thermal comfort.

[Embodiment 2]
In this embodiment, a configuration example regarding control of the entire building air conditioning system will be described. The description of the same parts as those in the first embodiment will be simplified.

As shown in FIG. 1, remote indicators 601a and 601b for controlling the damper opening of the air volume adjustment dampers 350a and 350b are arranged in the private room 31a and the LD 31c, respectively. The remote indicator 601 can communicate with the controller 605 via a control line or by wireless communication. As the remote indicator 601, for example, an operation panel embedded in a wall, or a remote controller capable of communicating with a receiving unit arranged indoors using infrared rays or the like is used.

  FIG. 6 is a functional block diagram for explaining the control of this embodiment. In such a configuration, the resident 5 operates the remote indicator 601 to set a desired environment. The setting items are, for example, indoor temperature and air volume. The remote indicator 601 generates instruction information relating to temperature and air volume based on the instruction content, and sends it to the controller 605. A temperature sensor 608 is arranged in each room. The controller 605 acquires the detected temperature value by communicating with the temperature sensor. The method of measuring the environment such as the temperature of the room is not limited to this, and for example, thermal image recognition processing may be performed. Further, the controller 605 may operate not to receive an instruction from the occupant 5 but to maintain a preprogrammed temperature or air volume.

As the controller 605, an information processing device having a computing resource such as a CPU and a memory and operating according to a command of a program expanded on the memory, for example, a computer, a workstation, a home automation gateway, or the like can be considered. Further, it is preferable that the remote indicator and the temperature sensor are integrated, and further that the controller is also integrated therein. If the building is a condominium or building, a centralized management system for that building may be used.
The controller 605 acquires instruction information regarding the temperature and the air volume, and the detected temperature value. The controller 605 also obtains current opening information from the air volume control damper 350 and current air conditioner operation information from the air conditioner 240. Then, the controller 605 calculates the control information of the damper opening and the air conditioner operation for realizing the instruction of the occupant 5, and the control information of the opening for the air volume control damper 350 and the operation control for the air conditioner 240. Send information.

According to the present embodiment, it is possible to preferably realize control for each area and each room.
In the above description, the controller 605 controls the two devices, the air volume control damper 350 and the air conditioner 240. However, depending on the content of the instruction from the occupant 5 and the current temperature, at least the opening control of the air volume control damper 350 can be performed to execute the entire building air conditioning including the planned ventilation. On the contrary, the controller 605 may control the operations of the ventilation air supply fan as well as the air conditioner 240 and the air volume control damper 350.
Further, the remote indicator 601 may be of a system that directly adjusts the opening degree of the electrically driven air volume control damper by an electric signal from a rotary dial or the like.

[Third Embodiment]
In the present embodiment, another configuration example regarding control of the entire building air conditioning system will be described. The description of the same parts as in the first and second embodiments will be simplified.

  FIG. 7 is a partially enlarged view showing the configuration around the air conditioner 240 in the overall air conditioning system of the present embodiment including the differential pressure damper 701. One of the differential pressure dampers 701 is connected by a first duct 703 to a position closer to the air conditioner than the installation location of the air volume control damper 350 in the air conditioner air supply duct 247. Besides the air conditioner air supply duct 247, the first duct 703 may be provided in the chamber box provided on the air conditioner outlet side. The other side of the differential pressure damper 701 is connected by a second duct 705 to a suction side chamber 720 arranged in the air conditioner suction portion. As the differential pressure damper 701, a pressure adjustment damper including an existing pressure relief damper, which has a large opening when the pressure difference between the connected spaces exceeds a set value, can be used.

In the entire building air conditioning system having such a configuration, when the air volume control damper 350 is closed, or when the air volume control damper 350 is closed to a higher degree, the differential pressure before and after the differential pressure damper 701 increases, and the differential pressure damper 701 becomes open. As a result, the air conditioner air supply 503 from the air conditioner 240 flows toward the air conditioner intake side, and the air conditioner intake temperature approaches the air conditioner supply air temperature. Then, since the cooling/heating output and the air volume of the air conditioner are suppressed by the automatic control that a general-purpose air conditioner normally has, it is possible to avoid applying an excessive load to the air conditioner. Therefore, the entire building air conditioning system can be stably and continuously operated.

  1: Whole building air conditioning system, 210: Ventilation and air supply device, 243: Ventilation and air supply duct, 240: Air conditioner, 247: Air conditioning air supply duct, 350: Air volume control damper, 248: Ventilation and air supply confluence pipe, 249: Air conditioning and air supply duct

Claims (7)

An air conditioning system for supplying air conditioning air supply in which ventilation air supply and air conditioner air supply are combined to each of a plurality of areas included in a living space,
A ventilation air supply device that sends the outside air taken in to a plurality of ventilation air supply ducts corresponding to each of the plurality of areas, and makes the ventilation air supply.
An air conditioner that adjusts the air sucked from the living space to supply air to the air conditioner, and sends the air conditioner air supply to a plurality of air conditioner air supply ducts corresponding to each of the plurality of areas,
A plurality of air volume control dampers that individually control the air volume of the air conditioner supply air sent to the plurality of air conditioner air supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, in which the ventilation air supply and the air conditioner air supply are combined to form the air conditioning air supply, and the air conditioning supply air is supplied to the living space through an air conditioning air supply duct. Part,
On the upstream side, the ventilation air supply duct and the air conditioner air supply duct in which the corresponding area is the same as the merging portion are connected,
On the downstream side, the corresponding area is the same as the confluence section, an air conditioning air supply duct for supplying the air conditioning air supply to the living space is connected, a confluence section,
Is equipped with
When the flow of the air conditioner supply air from the air conditioner air supply duct toward the air conditioner air supply duct is the main flow, the flow of the ventilation air supply in the direction of the main flow is An air-conditioning system characterized by the fact that the directions merge from the rear. The air-conditioning system according to claim 1, wherein, in the merging portion, the main flow direction and the ventilation/supply air flow direction meet at an acute angle. An air conditioning system for supplying air conditioning air supply in which ventilation air supply and air conditioner air supply are combined to each of a plurality of areas included in a living space,
A ventilation air supply device that sends the outside air taken in to a plurality of ventilation air supply ducts corresponding to each of the plurality of areas, and makes the ventilation air supply.
An air conditioner that adjusts the air sucked from the living space to supply air to the air conditioner, and sends the air conditioner air supply to a plurality of air conditioner air supply ducts corresponding to each of the plurality of areas,
A plurality of air volume control dampers that individually control the air volume of the air conditioner supply air sent to the plurality of air conditioner air supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, in which the ventilation air supply and the air conditioner air supply are combined to form the air conditioning air supply, and the air conditioning supply air is supplied to the living space through an air conditioning air supply duct. Part,
On the upstream side, the ventilation air supply duct and the air conditioner air supply duct in which the corresponding area is the same as the merging portion are connected,
On the downstream side, the corresponding area is the same as the confluence section, an air conditioning air supply duct for supplying the air conditioning air supply to the living space is connected, a confluence section,
Is equipped with
The ventilation air supply duct is configured such that, when the air conditioner is stopped and the ventilation air supply device is operating, substantially the entire amount of the ventilation air supply is delivered to the side of the air conditioning air supply duct. An air conditioning system connected to the merging portion. The air conditioning system according to any one of claims 1 to 3, wherein the air volume control damper includes a fully closed prevention mechanism. Further comprising a remote indicator for individually adjusting the environment of the plurality of areas,
The air conditioning system according to any one of claims 1 to 4, wherein the air volume control damper is individually controlled based on instruction information from the remote indicator. The ventilation air supply device, the air conditioner, the plurality of air volume control dampers, and the plurality of merging portions are arranged in a ceiling space,
Each of the plurality of air-conditioning air supply ducts sends out the air-conditioning air supply from the ceiling space to a plurality of areas of the underfloor space,
Air-conditioning air supply is sent to the living space from the floor outlet through the underfloor space,
The air conditioning system according to any one of claims 1 to 5, characterized in that Further equipped with a differential pressure damper,
One of the differential pressure dampers is connected to a position closer to the air conditioner than the air volume control damper in the air conditioner air supply duct, and the other of the differential pressure dampers is connected to a suction side of the air conditioner. The air conditioning system according to any one of claims 1 to 6.

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