JP7290936B2 - air conditioning system - Google Patents

Description

The present invention relates to air conditioning systems.

2. Description of the Related Art In the air conditioning of houses and buildings, various configurations have been devised in order to realize a central air conditioning system. By using the air-conditioning system for the entire building, it is expected that various processes such as planned ventilation, cooling and heating, and air cleaning will be operated in an integrated manner to maintain a comfortable environment 24 hours a day.

FIG. 8 shows an example of a central air-conditioning system. The central air-conditioning system 1 takes outside air 501 into the building with a ventilation supply fan 212 , adjusts the temperature, humidity, etc. with an air conditioner 240 , converts it into air-conditioner supply air 503 , and sends it into an air-conditioning supply duct 245 . The air-conditioning supply air 503 of the air-conditioning supply air duct 245 is sent to the rooms (private rooms 31a, LD31c) to be air-conditioned in the living space 30 through the branch air-conditioning supply air ducts 245a to 245c branched to each room, and is sent to the air outlet. Air conditioning supply air 506a-506c is blown out from 310a-310c. The air in each room moves through the undercuts 36a and 36b, passage louvers, etc., is sucked into the air conditioner 240 from the air conditioner inlet 320 in the room (corridor 31b), circulates, and is 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, similar air volume control dampers may be arranged at the bases of the branch air conditioning supply ducts 245a to 245c for air supply. Then, the user adjusts the opening of the air volume control damper and the air volume of the air conditioner, and automatically controls the opening of the damper 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, a whole building air-conditioning system can be operated, and components related to the air-conditioning system, such as equipment and ducts, are mainly arranged in the ceiling space.

Patent document 1 (Japanese Patent No. 2734280) also discloses a type of air conditioner in which outside air sucked by an intake fan is adjusted by an air conditioner unit and supplied indoors.

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

In addition, in Patent Document 3 (Patent No. 5762317), the ventilation supply air sucked from the outside and sent to the indoor side and the supply air taken in from the room and adjusted by the air conditioner and then circulating inside the room merge. An air conditioner including an air passage junction is disclosed. In Patent Document 3, by using a non-motorized, gravity-based shutter at the part where the duct of each air path is connected to the air path confluence, special air volume control of the air conditioner and interim fan operation are unnecessary. there is

In addition, the central air-conditioning system can be suitably used in a building having a double-floor structure. For example, Patent Document 4 (Patent No. 5137599) discloses an air conditioning system of a floor blowing type in which the underfloor space of a double floor is used as an air supply path, and supplied air is blown into the room from a floor outlet provided on the floor of each room. disclosed. By using the underfloor space as an air supply path for the air conditioner in this way, it is possible to improve energy efficiency compared to general floor heating, and create comfort with little temperature difference between the top and bottom due to the radiant heat from the floor. In particular, in collective housing where ceiling space is narrow and duct laying is often restricted by beams, the use of underfloor space is highly effective in that air conditioning supply ducts to each room can be omitted.

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

Several problems have been pointed out when a whole building air-conditioning system is configured by a conventional method of supplying ventilation supply air to the air conditioner intake side as shown in Patent Document 1 and FIG. 8 . First, for planned ventilation in intermediate periods when air conditioning is not required, special control is required to make the air volume of the fan in the air conditioner equal to or greater than the air volume of the ventilation supply fan. Also, when cooling and heating, 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 dedicated devices and parts as components of the central air conditioning system (for example, ventilation supply fans, air conditioners, main remote controllers, temperature controllers, air volume control dampers, etc.). As a result, there are problems such as a decrease in the degree of freedom in design and an increase in cost. Moreover, since the fan in the air conditioner needs to be operated all year round, there is a problem of consuming extra air conveying energy.
In particular, in the case of the configuration shown in FIG. 8, since the outlets of each room are located near the ceiling, the feet are cold during heating, and the wind blowing against the body is uncomfortable because air conditioning is based only on air currents. Furthermore, as described above, since the air-conditioning supply ducts for each room are installed in the ceiling in the configuration of FIG. there were.

Problems have also been pointed out with respect to the type of technology that supplies ventilation air to the air conditioner blowout 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, "number of rooms x 2" flow rate adjustment mechanisms are required. In addition, a dedicated air conditioner or control unit with a special automatic control function that increases or decreases the fan air volume according to the degree of adjustment of the flow rate adjustment mechanism is required.
As a result, the cost increases due to an increase in the number of members and the manufacturing of dedicated parts. Moreover, the problem of compressing the space in the ceiling is not solved, which is a problem particularly in application to housing complexes.

In addition, in the air conditioner disclosed in Patent Document 3, which has an air passage merging portion where the ventilation air supply and the air conditioning air supply merge, a movable shutter that opens and closes by wind force is used in the merging portion, so there is a concern about failure. be. In addition, when maintaining, repairing, or replacing such parts, install a ceiling inspection door or secure an inspection space in the ceiling, etc., so that it is possible to access the installation position of the parts and work It is necessary to take measures to As a result, ceiling space is squeezed and ceiling access doors constrain ceiling lighting plans.
In addition, since gravity-based shutters have restrictions on the top and bottom installation, there is a possibility that equipment installation errors may be induced during construction. In addition, especially in a narrow ceiling space in a collective housing,
The duct design of the air confluence pipe and the duct attached to it becomes difficult, the duct bends more and the pressure loss increases, and there is a possibility that the duct installation error may occur during construction. In addition, since it is assumed that planned ventilation and air volume of air conditioners differ from house to house, manufacturers need to manufacture air passage junction pipes with various combinations of connecting duct diameters, which leads to an increase in cost.
Further, the method of Patent Document 3 does not support adjustment of the air-conditioning capacity for each room or area.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a technique for performing good planned ventilation regardless of the operating state of the air conditioner in a central air-conditioning system.

In order to achieve the above objects, the present invention employs the following configuration. i.e.
An air-conditioning system that supplies air-conditioning supply air in which ventilation supply air and air-conditioning supply air are combined to each of a plurality of areas included in a living space,
a ventilation and air supply device that sends out the taken outside air to a plurality of ventilation and air supply ducts corresponding to each of the plurality of areas to use as the ventilation and supply air;
An air conditioner that adjusts the air sucked from the living space and supplies the air to the air conditioner, wherein the air is sent to a plurality of air conditioner supply ducts corresponding to each of the plurality of areas;
a plurality of air volume control dampers for individually controlling the air volume of the air supplied to the plurality of air conditioner supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, wherein the ventilation supply air and the air conditioning supply air are merged to form the air conditioning supply air, and the air conditioning supply air is supplied to the living space through an air conditioning supply duct. department and
The ventilation supply air duct and the air conditioner supply air duct whose corresponding areas are the same as the confluence are connected to the upstream side,
on the downstream side, a junction section connected to an air conditioning supply duct for supplying the air conditioning supply air to the living space, the corresponding area being the same as the junction section;
and
Assuming that the flow of the supply air from the air conditioner supply duct to the air supply duct at the junction is the main flow, the direction of the flow of the ventilation supply at the junction is relative to the direction of the main flow. This air-conditioning system is characterized in that the directions are joined from the rear.

According to such a configuration, planned ventilation and air conditioning of the central 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, the direction of the main flow and the direction of the flow of the ventilation/supply air may join at an acute angle at the junction.

The present invention also employs the following configuration. i.e.
An air-conditioning system that supplies air-conditioning supply air in which ventilation supply air and air-conditioning supply air are combined to each of a plurality of areas included in a living space,
a ventilation and air supply device that sends out the taken outside air to a plurality of ventilation and air supply ducts corresponding to each of the plurality of areas to use as the ventilation and supply air;
An air conditioner that adjusts the air sucked from the living space and supplies the air to the air conditioner, wherein the air is sent to a plurality of air conditioner supply ducts corresponding to each of the plurality of areas;
a plurality of air volume control dampers for individually controlling the air volume of the air supplied to the plurality of air conditioner supply ducts;
A plurality of confluences corresponding to each of the plurality of areas, wherein the ventilation supply air and the air conditioning supply air are merged to form the air conditioning supply air, and the air conditioning supply air is supplied to the living space through an air conditioning supply duct. department and
The ventilation supply air duct and the air conditioner supply air duct whose corresponding areas are the same as the confluence are connected to the upstream side,
on the downstream side, a junction section connected to an air conditioning supply duct for supplying the air conditioning supply air to the living space, the corresponding area being the same as the junction section;
and
The ventilation/supply duct is configured such that substantially the entire amount of the ventilation/supply air is sent out to the side of the air conditioning/supply duct when the air conditioner is stopped and the ventilation/supply device is in operation. , and the confluence section.

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

Furthermore, the air volume control damper may employ a configuration including a full-close 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, it is possible to satisfactorily control each area or each room. Alternatively, a manual remote controller for adjusting the opening degree of the air volume adjustment damper may be provided.
Further, the ventilation/air supply device, the air conditioner, and the merging section may be arranged in a ceiling space, and the air conditioning supply duct may adopt a configuration in which the air conditioning supply air is sent from the ceiling space to the underfloor space. good. As a result, various advantages of an air-conditioning system using a floor blowing method can be enjoyed.
Further, a differential pressure damper is further provided, 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 supply duct of the air conditioner, and the other of the differential pressure dampers is connected to the intake of the air conditioner. You may employ|adopt the structure connected to the side. As a result, the air conditioning system can be operated continuously in a more stable manner.

ADVANTAGE OF THE INVENTION According to this invention, in a central air-conditioning system, the technique which performs favorable planned ventilation regardless of the operating state of an air conditioner can be provided.

It is a figure showing composition of a building provided with an air-conditioning system. It is a figure explaining the confluence|merging of ventilation air supply. FIG. 4 is a schematic diagram showing how air merges in a ventilation air supply merging pipe; FIG. 4 is a schematic diagram showing how air merges in a ventilation air supply merging pipe; FIG. 4 is a schematic diagram showing how air merges in a ventilation air supply merging pipe; FIG. 11 is a schematic diagram showing a comparative example of air merging in a ventilation air supply merging pipe; 4 is a graph showing the relationship between the merging angle of ventilation air supply to the ventilation air supply merging pipe and the air conditioning air supply rate. FIG. 9 is a block diagram illustrating control in Embodiment 2; FIG. 11 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 configuration blocks and their relative arrangement described below should be appropriately changed according to various conditions of the system to which the invention is applied, and the scope of this invention is limited to the following description. not a thing

INDUSTRIAL APPLICABILITY The present invention can be preferably applied to air conditioners and air conditioning systems, buildings equipped with them, and control methods thereof. The present invention can also be regarded as a program that operates using the computational resources of an information processing device and causes the information processing device to execute each step of the control method, and a computer-readable storage medium storing such a program. . The storage medium may be a non-temporary storage medium.

[Embodiment 1]
FIG. 1 is a schematic diagram for explaining an example of the configuration and arrangement of this embodiment, and shows a cross section of one section assuming one dwelling unit of a collective housing on one floor of a building. The technology of this embodiment can be applied not only to collective housing but also to various buildings such as offices, public facilities, and detached houses.

(overall structure)
In FIG. 1, the sections to be air-conditioned are roughly divided into a lower boundary surface 21 that is the boundary with the lower floor, an upper boundary surface 11 that is the boundary with the upper floor, and a wall surface 33 that is the boundary with the next room or the outside of the building. is the region delimited by The lower boundary surface 21 is the upper surface of a structure such as a floor slab, a heat insulating material laid thereon, or the like. The upper boundary surface 11 is the lower surface of a structure such as a ceiling slab, or a heat insulating material or the like installed thereunder. The wall surface 33 is made of a structure such as a wall material, and the wall material may also serve as the wall surface of an adjacent room or the outer wall of the building.

The interior of the room is partitioned 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 where residents are active, and is a target space whose environment such as temperature is adjusted. Various components of the central air-conditioning system 1 are arranged in the ceiling space 10 .
Ceiling 12, double floor 22 and walls 33 may not be horizontal or vertical. For example, the private room 31a and the LD 31c where residents mainly work may have a relatively high ceiling, and the corridor 31b may have a relatively low ceiling. As a result, it is possible to secure a large space in the space above the ceiling of the corridor for arranging air conditioners and ducts. Also, the ceiling 12, the double floor 22 and the wall surface 33 may partially have steps, protrusions, recesses, or the like. For example, when the air conditioning supply duct 249 is arranged from the ceiling space 10 to the underfloor space 20, a cover may be provided to hide the duct.

In this embodiment, a floor-type air conditioning system is used. Therefore, the air adjusted by the air conditioner 240 and others in the ceiling space 10 moves to the underfloor space 20 through the duct, and then is sent out from the floor outlet 340 to each room. An underfloor space 20 is formed between a lower boundary surface 21 and a double floor 22 installed thereon using supporting legs or the like. It is preferable to lay a heat insulating material on the lower boundary surface 21 and the wall surface 33 of the underfloor space 20 .
In this embodiment, a partition 20c is provided to divide the underfloor space into two areas (underfloor spaces 20a and 20b). This makes it possible to individually control the air conditioning capacity of each room or each area.
By using the air conditioning system of the floor blowing type as in this embodiment, radiant air conditioning (radiant air conditioning) can be performed from the floor surface by transferring the heat of the air conditioning supply air moving in the underfloor space 20 to the double floor 22. Become. By using radiant air conditioning, it is possible, for example, to reduce the coldness of feet during heating, to create an air-conditioned environment with less unevenness in temperature, and to reduce discomfort caused by air currents hitting the body.
It is also preferable to make the opening area of the floor outlets adjustable. This makes it possible to adjust the amount of air supply for air conditioning, so it is possible to flexibly respond to different cooling and heating demands for each room, each area, or within a 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 a floor-type air-conditioning system and control for each room are not necessarily essential.

(ventilation and air conditioning)
Regarding planned ventilation, the central air-conditioning system 1 takes outside air 501 into the building, sends it to the ventilation supply duct 243 by the ventilation supply fan 212 of the ventilation supply device 210, and makes ventilation supply air 502 in FIG. In this embodiment, the ventilation supply duct 243 branches downstream to form ventilation supply ducts 243a and 243b. The branched ventilation supply ducts 243a and 243b respectively correspond to the areas of the underfloor spaces 20a and 20b. Note that the branch configuration in FIG. 1 is an example, and an appropriate number of divisions can be adopted according to the number of air-conditioned areas. Also, if there is no need to divide the air-conditioned areas, there is no need to provide a branch. Furthermore, the ventilation supply fan may be a simultaneous air supply/exhaust type ventilation unit integrated with a ventilation exhaust fan in the same unit, or a heat exchange type ventilation unit integrated with a heat exchange structure. The heat exchange structure may be a heat exchange system using a heat pipe, a heat pump, or a moisture absorption/desorption material in addition to a stationary heat exchange element or a rotating heat exchange rotor.

The central air-conditioning system 1 performs air conditioning using the air conditioner 240 . The air conditioner 240 is usually called an air conditioner indoor unit, and typically includes an air conditioner fan 242 and a heat exchanger shown in the air conditioner 240, as well as a control device and the like (not shown). Furthermore, in addition to the duct connected to the air conditioner 240, an outdoor unit containing a compressor, an expansion valve, a heat exchanger, etc., 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 also have the function of adjusting air conditions 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, and converts it into air supply air 503, which is sent to the subsequent air supply duct 247 by the air conditioner fan 242 and circulated. The air conditioner supply duct 247 is also branched downstream according to the number of areas and the number of rooms in the underfloor space 20 to form air conditioner supply ducts 247a and 247b.

Air volume control dampers 350a and 350b that change the air volume according to the degree of opening are provided in the air conditioner supply air ducts 247a and 247b, respectively. The air volume control damper 350 changes its opening according to a control signal from the controller or by manual control. The amount of air supplied to each branch duct can be adjusted according to the opening of the air volume control damper. Then, the air-conditioner supply air whose air volume has been controlled is combined with the ventilation supply air, and then sent out to each area. That is, in the present embodiment, the ratio of the air volume of the air supplied to the air conditioner for each area is changed without finely controlling the air conditioner fan, and the environmental adjustment is executed for each area. It should be noted that the air volume of the air conditioner fan may be adjusted together with the opening control of the damper. The air volume control damper is arranged at any position of the air-conditioning air supply duct, for example, at the end (position close to the ventilation supply air junction pipe) or the middle part.

Preferably, the air volume control damper 350 has a full-close prevention function using a stopper or the like. As a result, it is possible to prevent a situation in which the air supply outlet of the air conditioner is clogged and the minimum required air volume for stable operation of the air conditioner cannot be secured. As a result, the outlet of the air conditioner is not blocked during the cooling and heating operation of the air conditioner, and a general-purpose air conditioner can be used as the air conditioner 240, leading to cost reduction.

Ventilation supply air merging pipes 248a and 248b are arranged downstream of the ventilation supply air and the air conditioner supply air. The ventilation supply air duct 243a and the air conditioner supply air duct 247a, the ventilation supply air duct 243b and the branch air conditioner supply air duct 247b are connected to the ventilation supply air merging pipes 248a and 248b, respectively, and the respective air supplies are connected in the ventilation air supply merging pipes. merges. Ventilation supply air 502 and air conditioner supply air 503 are joined at ventilation supply air merging pipes 248a and 248b to form air conditioning supply air 506a and 506b. Air conditioning supply air 506a, 506b reaches each area of the underfloor space 20 through air conditioning supply air ducts 249a, 249b provided for each area, and is sent into the room from 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, the majority of the air-conditioning supply air from the air-conditioning supply air ducts 249a and 249b can be used for the floor blowing of the respective target areas. A wind direction adjusting plate may be provided at the outlet portion of the air conditioning supply duct 249 so that the air is sent to the outlets 340a, 340b+340c. Alternatively, a plurality of air conditioning supply ducts 249a and 249b may be bundled and arranged along the wall, and a cover covering the whole may be provided. The ventilation supply air merging pipe corresponds to the merging portion of the present invention.

Air-conditioning supply air blown into each room moves through the undercuts 36a and 36b, the passage louver, etc., and is sucked into the air conditioner 240 from the suction port 320. - 特許庁

As described above, in this embodiment, the air volume control damper 350 and the ventilation/air supply merging pipe 248 are provided in order from the air conditioner 240 side (upstream side of the air conditioner supply) in the air conditioner supply duct 247 of the air conditioner. In addition, when viewed from the ventilation/supply fan 212 side, a ventilation/supply merging pipe 248 is installed downstream of the ventilation/supply duct 243 (in the direction in which the ventilation/supply air advances). An air conditioning supply duct 249 is connected to the downstream side of the ventilation supply air merging pipe 248 (in the direction in which the air conditioning supply air and the ventilation supply air flow together).

(Method of merging air supply of air conditioner and ventilation)
Next, a method of joining the air supply of the air conditioner and the air supply of the ventilation so that sufficient planned ventilation is performed even when the air conditioner 240 is stopped will be described.
The flow of air supplied from the air conditioner 240 toward the downstream side (air conditioning supply side) in the ventilation supply air junction pipe 248 is referred to as a "main flow". That is, the main flow is the air supply air flow in the ventilation air supply merging pipe that goes from the air conditioning air supply duct 247 to the air conditioning air supply duct 249 via the ventilation air supply merging pipe 248 . The direction of the air conditioner supply air flow in the ventilation supply air junction 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 joins the air conditioner supply air in the ventilation supply air joining pipe, the ventilation supply air flow joins the main flow from behind. Here, "merging 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. In other words, the direction of the main flow and the direction of the ventilation/supply air flow entering the ventilation/supply/air merging pipe do not have three-dimensionally opposite positive and negative components, and the two flows merge in the ventilation/supply/air merging pipe. , the second case where the confluence angle between the main flow and the ventilation supply flow is acute. By configuring the duct connection part of the ventilation supply/air confluence pipe so that it has such a confluence angle, the ventilation supply entering the ventilation supply/air confluence pipe can flow backward to the upstream side of the air conditioner supply air flow even when the air conditioner is stopped. Therefore, most of the ventilation air supply (preferably, substantially the entire amount) can be sent to the air conditioning supply side.

FIG. 2 shows a configuration example of the ventilation supply air merging pipe 248 for realizing the merging of airflows as described above. In this figure, the ventilation supply duct 243 enters the ventilation supply merging pipe 248 before reaching the merging position, but the ventilation supply duct 243 may extend to the merging position.
FIG. 2(a) shows the case where the main flow 532 is substantially linear. Since the direction in which the ventilation supply air duct 243 is connected to the ventilation supply air merging pipe 248 is at an acute angle, the ventilation supply air can join the main flow at an acute angle.

FIG. 2(b) shows another example of duct piping, and since the ventilation supply air confluence pipe is bent, the main flow 532 directed from the air conditioning supply air duct 247 to the air conditioning supply air duct 249 is also bent. . Even in this case, the direction of the air supply air flow and the direction of the ventilation supply air flow at the confluence position merge at an acute angle.

Next, with reference to FIGS. 2(c) to 2(e), conditions for the convergence angle of airflows will be described using various duct shapes as subjects.
FIG. 2(c) shows a case where the direction from the air supply to the air conditioner is substantially straight, as in FIG. 2(a). In the figure, reference numeral 252a indicates the merging position of the ventilation air supply in the ventilation air supply merging pipe. That is, ventilation supply air 502 joins main flow 532 at join location 252a. When the ventilation supply air 502 joins the main flow in the direction indicated by reference numeral 502a, it corresponds to merging from the rear, so even when the air conditioner is stopped, most of the ventilation supply air can be sent to the room to be air-conditioned and ventilated. Sufficient planned ventilation is performed in the room of (hereinafter, "○" above the symbol indicates that there is no problem with ventilation). Even when the air conditioner merges in the direction indicated by reference numeral 502b, the merging angle becomes an acute angle, so sufficient planned ventilation is performed even when the air conditioner is stopped. On the other hand, when joining in the direction of symbol 502c, a certain amount of ventilation supply air flows backward to the upstream side (air conditioner supply air duct side) when the air conditioner is stopped (hereinafter, if there is a problem with ventilation, the "x" above the symbol ), insufficient planned ventilation.

Therefore, in the case of FIG. 2(c), the preferred direction of merging is between 502a and 502b. In this way, when the air conditioner merges from the rear or merges at an acute angle, in other words, when the air merges at an angle smaller than a right angle, sufficient planned ventilation is performed even when the air conditioner is stopped. In the case of this figure, when assuming the pipe cross section of the connection part of the air conditioning supply air duct on the downstream side of the ventilation air supply air merging pipe, the ventilation air supply joins 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. 2(d), the ventilation supply/air junction pipe 248 is bent, and the angle is smaller than a right angle. Consider that the path of the main flow 532 in the ventilation supply-air junction is approximately straight.
In the figure, reference numeral 252b indicates one confluence position, and reference numerals 502d to 502f indicate examples of directions of the ventilation supply 502 at the confluence position 252b. Further, reference numeral 252c indicates another confluence position, and reference numerals 502g-502i indicate examples of directions of the ventilation supply 502 at the confluence position 252c.
For merge location 252b, the preferred merge orientation is between 502d and 502e. Also, with respect to merge position 252c, the preferred merge orientation is between 502g and 502h. On the other hand, if the direction is 502f or 502i, there is a risk that the ventilation/supply air will flow back when the air conditioner is stopped.

In the case of FIG. 2(e), the ventilation/supply merging pipe 248 is bent at a substantially right angle. The main flow 532 in the ventilation supply air junction travels along the bend.
In the figure, reference numeral 252d indicates one merging position, and reference numerals 502j to 502l indicate examples of directions of the ventilation supply air 502 at the merging position 252d. Further, reference numeral 252e indicates another merging position, and reference numerals 502m to 502o indicate examples of directions of the ventilation supply 502 at the merging position 252e.
For merge location 252d, the preferred merge orientation is between 502j and 502k. Also with respect to merge location 252e, the preferred merge orientation is between 502m and 502n. On the other hand, if the direction is 502l or 502o, there is a risk that the ventilation/supply air will flow back when the air conditioner is stopped.

(Schematic diagram of airflow in the ventilation supply air merging pipe)
The airflow in the ventilation supply air junction 248 will be further described with reference to the schematic diagrams of FIGS. 3A-3C. In Figures 3A-3C, the merging angle of the ventilation supply air to the air conditioning supply air is 45°, which can be said to be merging from behind or at an acute angle. 3A to 3C are schematic diagrams showing the results of numerical fluid analysis of the pipe center cross-sectional flow around the ventilation/air supply confluence pipe when the operating conditions of the ventilation/air supply fan 212 and the air conditioner 240 are changed. The air flow rate is indicated by the thickness and length of the arrow.

FIG. 3A shows a state in which both the air conditioner fan 242 and the ventilation supply fan 212 are in operation, and corresponds to the operation of the air conditioning operation period. At this time, the air conditioner supply air duct 24
7 and the ventilation supply air duct 243 are both mechanical air supply, and the total of both is the air conditioning supply duct air volume. For example, the air volume ratio for each flow in this simulation is 1 for the ventilation air supply to 6.25 for the air conditioning air supply and 7.25 for the air conditioning air supply. Therefore, when both units are in operation, all of the airflow that enters the air supply merging pipe exits from the downstream side (air conditioning supply air duct side), so air conditioning supply air that has undergone planned ventilation and air conditioning with an air conditioner can be properly applied to the living space. supplied.

FIG. 3B shows a state in which the air conditioner fan 242 is stopped and only the ventilation supply fan 212 is in operation, which corresponds to the time when cooling and heating are not required in the interim period or the like and the air conditioner fan 242 is stopped. Since the confluence angle is acute, the ventilation supply air 502 advances downstream (air conditioning supply duct side) when blown out at the confluence position. As a result, substantially the entire amount of ventilation supply air proceeds to the air conditioning supply duct side.
At this time, a forward flow is generated in the air conditioner supply air duct by being attracted by the flow of the ventilation supply air in the ventilation supply air merging pipe. For example, the air volume ratio for each flow in this simulation is 1 for the ventilation supply, 0.66 for the air conditioning supply on the forward side, and 1.66 for the air conditioning supply on the downstream side. The induced forward flow is small in amount and the air taken in by the air conditioner in the living space is supplied to the room, so there is almost no problem in terms of ventilation and air conditioning. Therefore, planned ventilation can be implemented appropriately.

FIG. 3C shows a state in which the ventilation supply fan 212 is stopped and the air conditioner fan 242 is in operation. Normally, such operation is not performed, but there is a possibility that it will be temporarily performed. Since the connection angle is acute, substantially all of the air supplied to the air conditioner flows forward into the air supply duct. Therefore, the living space can be appropriately cooled and heated. Although a small portion of the supplied air from the air conditioner flows back through the ventilation supply duct 243 and leaks out, there is almost no functional problem with the air conditioning system throughout the building, and the supplied air after air conditioning does not go out to the outside. For example, the air volume ratio of each flow in this simulation is 1 for the air supply of the air conditioner, and 0.988, which is almost the entire amount, advances inside the air supply duct of the air conditioner. The amount that flows back into the ventilation supply duct is only -0.012.

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

FIG. 5(a) is a graph showing the "air conditioning supply rate (vs. ventilation supply)" at various merging angles of the ventilation supply in the ventilation supply air merging pipe. "Air conditioning supply air ratio (vs. ventilation supply air)" is the ratio of the air volume of the air conditioning supply air after merging to the air volume of the ventilation supply air when only the ventilation 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, the air-conditioning air supply air volume is greater than the ventilation air supply air volume, indicating that planned ventilation functions smoothly. FIG. 5A 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 (versus ventilation air supply) is represented by the following equation (1).
Air-conditioning air supply rate (vs. ventilation air supply) = air-conditioning air supply duct air volume/ventilation air supply duct air volume (1)
From FIG. 5(a), it was found that planned ventilation works well if the convergence angle is an acute angle smaller than a right angle.

FIG. 5(b) is a graph showing the "air conditioning air supply rate (vs. air conditioner air supply)" at various merging angles of the ventilation air supply in the ventilation air supply merging pipe. "Air conditioning supply air ratio (vs. air conditioning supply air)" is the ratio of the air volume of the air conditioning supply air after merging to the air volume of the air conditioning supply air when only the air conditioning fan is operating and the ventilation air supply fan is stopped. is. Accordingly, the case of an angle of 45° corresponds to FIG. 3C. The air-conditioning air supply rate (vs. air-conditioner air supply) is represented by the following equation (2).
Air-conditioning air supply rate (vs. 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 substantially all of the supplied air from the air conditioner flows forward to the air supply duct side regardless of the merging angle, and the cooling and heating of the air-conditioned object can be performed with sufficient functions. In addition, although a small part of the air supply from the air conditioner flows back into the ventilation supply air duct, it does not affect planned ventilation and air conditioning.

Through these simulations, it was confirmed that if the direction of air flow in the connecting pipe from the ventilation supply air duct to the ventilation supply air confluence pipe is in the forward direction of the main flow direction of the air conditioning supply air in the ventilation supply air confluence pipe. For example, regardless of whether the ventilation and air conditioning fans are in operation or not, the ventilation and air conditioner supply air volumes as planned or larger than planned can be sent to the air conditioning supply ducts. As a result, planned ventilation and air conditioning 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 during the interim periods when air conditioning is not performed. Therefore, it is expected that the operation cost will be reduced and failures will be prevented. Also, during the air conditioning season, by operating the air volume control damper installed on the air supply side of the air conditioner, the air conditioning supply that integrates planned ventilation and air conditioning processing can be supplied to the living space without complicated control of the air conditioner fan. A suitable environment can be provided to the occupants by sending out and adjusting the air conditioning capacity.
Furthermore, by providing an air-conditioning air supply duct, a ventilation air supply duct, and an air-conditioning air supply duct for each area, air conditioning air supply to a plurality of areas can be easily controlled individually.
In addition, if the air volume control damper has a function to prevent the air from being fully closed, the minimum amount of air required for stable operation of the air conditioner can be secured without blocking the supply of air, making it suitable for general-purpose air conditioning systems throughout the building. Air conditioning can be used, which leads to cost reduction.

Furthermore, in the configuration of this embodiment, there is no movable part in the ventilation supply/air junction pipe. Therefore, unlike the case of using a self-weight shutter, failure does not occur, and there is no need for ceiling inspection openings or maintenance and inspection spaces inside and outside the ceiling for inspection, maintenance, or replacement of parts. As a result, construction is possible or easy even in situations where the space in the ceiling space is limited, especially in collective housing, and the degree of freedom in duct placement increases. In addition, since only ducts with different diameters can be used as the constituent members of the confluence portion, manufacturing is easy.

Furthermore, as in this embodiment, a double floor structure is provided, and the air-conditioned air generated by the air conditioner 240 in the ceiling space is supplied into the room from the floor outlet via the underfloor space, so that both floor radiation and airflow are used. It is possible to achieve air conditioning throughout the building with excellent thermal comfort.

[Embodiment 2]
In this embodiment, a configuration example relating to control of a central air-conditioning system will be described. The description of the same parts as in the first embodiment is simplified.

As shown in FIG. 1, the private rooms 31a and LD 31c are provided with remote indicators 601a and 601b for controlling the damper opening degrees of the air volume adjustment dampers 350a and 350b, respectively. Remote indicator 601 can communicate with controller 605 via control lines or by wireless communication. As the remote indicator 601, for example, a wall-embedded control panel or a remote controller capable of communicating with a receiver placed 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 the desired environment. The setting items are, for example, indoor temperature and air volume. The remote indicator 601 generates instruction information regarding temperature and air volume based on the contents of the instruction, and transmits the information to the controller 605 . A temperature sensor 608 is arranged in each room. The controller 605 acquires the temperature detection value through communication with the temperature sensor. Note that the method of measuring the environment such as room temperature is not limited to this, and for example, thermal image recognition processing may be performed. Also, the controller 605 may operate so as to maintain a pre-programmed temperature and air volume instead of operating in response to an instruction from the resident 5 .

As the controller 605, an information processing device, such as a computer, a work station, or a gateway for home automation, which has computing resources such as a CPU and memory and operates according to instructions of a program developed on the memory, can be considered. Also, the remote indicator and temperature sensor are preferably integrated, and the controller is also preferably integrated therewith. If the building is an apartment complex or building, a centralized management system for that building may be used.
The controller 605 acquires instruction information regarding temperature and air volume, and temperature detection values. The controller 605 also acquires current opening information from the air volume control damper 350 and current air conditioner operation information from the air conditioner 240 . The controller 605 calculates the damper opening and air conditioner operation control information for realizing the instructions of the resident 5, and provides the opening control information to the air volume control damper 350 and the air conditioner 240 to control the operation. Send information.

According to this embodiment, it is possible to suitably realize control for each area or for each room.
In the above description, controller 605 controls two devices, air volume control damper 350 and air conditioner 240 . However, depending on the content of the instruction from the resident 5 and the current temperature, at least by controlling the opening degree of the air volume control damper 350, it is possible to perform the whole building air conditioning including planned ventilation. Conversely, the controller 605 may control the operation of not only the air conditioner 240 and air volume control damper 350 but also the ventilation supply fan.
Alternatively, the remote indicator 601 may be of a type that directly adjusts the opening degree of an electric air volume control damper with an electric signal from a rotary dial or the like.

[Embodiment 3]
In this embodiment, another configuration example regarding control of the central air-conditioning system will be described. The description of the same parts as those of 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 central air-conditioning system of this embodiment including the differential pressure damper 701. As shown in FIG. One of the differential pressure dampers 701 is connected by a first duct 703 to a position closer to the air conditioner than the air volume control damper 350 is installed in the air supply duct 247 . Besides the air conditioner supply duct 247, the first duct 703 may be provided in the chamber box provided on the air conditioner outlet side. The other end 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 such as a conventional pressure relief damper can be used, which opens when the pressure difference between the spaces to which it is connected exceeds a set value.

In the central air-conditioning system having such a configuration, when the air volume control damper 350 is blocked or when the degree of blockage of the air volume control damper 350 increases, the differential pressure before and after the differential pressure damper 701 increases, and the differential pressure damper 701 is closed. open. As a result, the air supply air 503 from the air conditioner 240 flows toward the air conditioner intake side, and the air intake temperature approaches the air supply air temperature. Then, the automatic control normally provided in general-purpose air conditioners suppresses the cooling and heating output and air volume of the air conditioner, so that it is possible to avoid putting an excessive load on the air conditioner. Therefore, the central air-conditioning system can be operated stably and continuously.

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

Claims (7)

An air-conditioning system that supplies air-conditioning supply air in which ventilation supply air and air-conditioning supply air are combined to each of a plurality of areas included in a living space,
a ventilation and air supply device that sends out the taken outside air to a plurality of ventilation and air supply ducts corresponding to each of the plurality of areas to use as the ventilation and supply air;
An air conditioner that adjusts the air sucked from the living space and supplies the air to the air conditioner, wherein the air is sent to a plurality of air conditioner supply ducts corresponding to each of the plurality of areas;
It is possible to individually adjust the air volume of the air supply air sent to the plurality of air conditioner supply air ducts, and adjust the air volume of the air supply air before joining the air supply air with the ventilation supply air. a plurality of air volume control dampers that adjust for each
The ventilation supply air and the air conditioner supply air are combined to form the air conditioning supply air, and the air conditioning supply air is supplied to the living space through an air conditioning supply duct, a plurality of areas corresponding to each of the plurality of areas , A confluence section where no shutter is provided ,
The ventilation supply air duct and the air conditioner supply air duct whose corresponding areas are the same as the confluence are connected to the upstream side,
on the downstream side, a junction section connected to an air conditioning supply duct for supplying the air conditioning supply air to the living space, the corresponding area being the same as the junction section;
and
Assuming that the flow of the supply air from the air conditioner supply duct to the air supply duct at the junction is the main flow, the direction of the flow of the ventilation supply at the junction is relative to the direction of the main flow. The direction is merging at an acute angle from the rear ,
The thickness of the ventilation supply duct joining the air conditioner supply duct is relatively thin compared to the air conditioner supply duct.
An air conditioning system characterized by: An air-conditioning system that supplies air-conditioning supply air in which ventilation supply air and air-conditioning supply air are combined to each of a plurality of areas included in a living space,
a ventilation and air supply device that sends out the taken outside air to a plurality of ventilation and air supply ducts corresponding to each of the plurality of areas to use as the ventilation and supply air;
An air conditioner that adjusts the air sucked from the living space and supplies the air to the air conditioner, wherein the air is sent to a plurality of air conditioner supply ducts corresponding to each of the plurality of areas;
It is possible to individually adjust the air volume of the air supply air sent to the plurality of air conditioner supply air ducts, and adjust the air volume of the air supply air before joining the air supply air with the ventilation supply air. a plurality of air volume control dampers that adjust for each
The ventilation supply air and the air conditioner supply air are combined to form the air conditioning supply air, and the air conditioning supply air is supplied to the living space through an air conditioning supply duct, a plurality of areas corresponding to each of the plurality of areas , A confluence section where no shutter is provided ,
The ventilation supply air duct and the air conditioner supply air duct whose corresponding areas are the same as the confluence are connected to the upstream side,
on the downstream side, a junction section connected to an air conditioning supply duct for supplying the air conditioning supply air to the living space, the corresponding area being the same as the junction section;
and
The ventilation/supply duct is configured such that substantially the entire amount of the ventilation/supply air is sent out to the side of the air conditioning/supply duct when the air conditioner is stopped and the ventilation/supply device is in operation. , connected to the junction ,
Assuming that the flow of the supply air from the air conditioner supply duct to the air supply duct at the junction is the main flow, the direction of the flow of the ventilation supply at the junction is relative to the direction of the main flow. The direction is merging at an acute angle from the rear,
When the ventilation supply device and the air conditioner are operating, the air volume of the ventilation supply air joining the air supply from the air conditioner is relatively smaller than that of the air supply from the air conditioner.
An air conditioning system characterized by: 3. The air conditioning system according to claim 1 , wherein no shutter is provided at a portion where the ventilation supply duct joins the air conditioning supply duct. 4. The air conditioning system according to any one of claims 1 to 3 , wherein the air volume control damper has a fully closed prevention mechanism. further comprising a remote indicator for individually adjusting the environment of the plurality of areas;
5. The air volume according to any one of claims 1 to 4 , wherein the air volume is individually controlled by individually controlling the opening degree of the air volume control damper based on the instruction information from the remote indicator. Air conditioning system as described. The ventilation and air supply device, the air conditioner, the plurality of air volume control dampers, and the plurality of confluence sections are arranged in a ceiling space,
each of the plurality of air-conditioning supply ducts sends out the air-conditioning supply air from the ceiling space to a plurality of areas of an underfloor space;
Air conditioning supply air is sent out 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: 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 supply duct of the air conditioner, and the other of the differential pressure dampers is connected to the suction side of the air conditioner. The air conditioning system according to any one of claims 1 to 6 .

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