JP7265566B2 - Method for evaluating construction condition of air flow passage and method for manufacturing building - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for evaluating the construction state of airflow passages and a method for manufacturing a building.

Patent Literature 1 listed below describes a building provided with an air flow path including a duct. A fan for supplying air is connected to the airflow passage, and at least a part of the fan is installed so as to pass through a closed space surrounded by building materials such as ceiling materials and floor materials.

JP 2017-083097 A

By the way, unexpected bending, crushing, or the like may occur in the duct during construction work for arranging the duct inside the building. Such bending, crushing, or the like increases the pressure loss of the duct, making it difficult to secure the required air volume. If such a defect in the construction state is discovered after the closed space is closed with building materials, there is a problem that the building materials need to be temporarily removed and the construction state of the duct needs to be repaired.

The present invention has been devised in view of the actual situation as described above, and its main object is to provide a method capable of evaluating the construction state of a duct before a closed space is closed with building materials.

The present invention is a method for evaluating the construction status of a ventilation channel including a duct extending through the building during the process of manufacturing a building, wherein the ventilation channel has an inlet and an outlet, Further, the air supplied from the first fan is planned to be conveyed from the inlet to the outlet, and at least part of the duct is installed so as to pass through a closed space surrounded by building materials. The method uses a second fan having a smaller air volume than the first fan to pre-determine at the inlet of the air flow path before the closed space is closed with the building material. measuring the air volume at the inlet or the outlet of the air flow path; based on the measured air volume and a predetermined threshold value for the air volume, the and a step of evaluating the construction state of the duct.

In the method for evaluating the construction state of the air flow passage according to the present invention, the evaluating step evaluates that the construction state of the duct is good when the air volume at the inlet or the outlet is equal to or greater than the threshold value. may

The method for evaluating the construction state of the air flow passage according to the present invention may further include closing the closed space with the building material when the air volume at the inlet or the outlet is equal to or greater than the threshold value.

In the method for evaluating the construction state of the air flow passage according to the present invention, the evaluating step evaluates that the construction state of the duct is not good when the air volume at the inlet or the outlet is less than the threshold value. good too.

In the method for evaluating the construction state of the air flow passage according to the present invention, when the air volume at the entrance or the exit is less than the threshold, the air volume at the entrance or the exit is equal to or greater than the threshold. A step of refurbishing the construction condition of the duct may be further included.

The method for evaluating the construction state of the air flow path according to the present invention further includes the step of determining the threshold value prior to the evaluating step, wherein the step of determining the threshold value is based on the static pressure and the air volume of the second fan. and a second curve representing the relationship between the pressure loss of the air flow path and the air volume.

The present invention is a method for evaluating the construction status of a ventilation channel including a duct extending through the building during the process of manufacturing a building, wherein the ventilation channel has an inlet and an outlet, Further, the air supplied from the first fan is planned to be conveyed from the inlet to the outlet, and at least part of the duct is installed so as to pass through a closed space surrounded by building materials. wherein, before the closed space is closed with the building material, a second fan with a constant air volume is used to supply air at a predetermined air volume to the inlet of the air flow path. measuring the number of revolutions of the second fan; and evaluating the construction state of the duct based on the measured number of revolutions and a predetermined threshold for the number of revolutions. characterized by executing

In the method for evaluating the construction state of the air flow passage according to the present invention, the evaluating step includes evaluating that the construction state of the duct is good when the measured rotational speed is less than the threshold value. good.

In the method for evaluating the construction state of the air flow passage according to the present invention, the evaluating step may evaluate that the construction state of the duct is not good when the measured rotational speed is equal to or greater than the threshold value. .

The present invention provides a building and a manufacturing method having an air flow path including a duct extending inside the building, and is characterized by including the above-described method for evaluating the construction state of the air flow path.

By adopting the above-described steps, the method for evaluating the construction state of the air flow path of the present invention makes it possible to evaluate the construction state of the duct before the closed space is closed with building materials.

1 is a conceptual diagram showing an example of a building; FIG. It is a flowchart which shows an example of the processing procedure of the construction state evaluation method of an air flow path. It is a conceptual diagram for demonstrating an example of the construction state evaluation method of an air flow path. It is a graph which shows an example of a 1st curve and a 2nd curve. It is a flowchart which shows an example of the processing procedure of the construction state evaluation method of the ventilation flow path of other embodiment of this invention. (a) is a graph showing an example of a second curve, and (b) is a graph showing the relationship between the static pressure and rotation speed of a second fan.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on the drawings. It should be understood that the drawings include exaggerated representations and representations that differ from the dimensional ratios of the actual structures in order to facilitate understanding of the content of the invention. In addition, throughout each embodiment, the same or common elements are denoted by the same reference numerals, and overlapping descriptions are omitted. Furthermore, the specific configurations shown in the embodiments and drawings are for understanding the content of the present invention, and the present invention is not limited to the illustrated specific configurations.

In the method for evaluating the construction state of the air flow passage of the present embodiment (hereinafter, sometimes simply referred to as the "evaluation method"), the construction state of the air flow passage including the duct extending inside the building is evaluated in the process of manufacturing the building. be done. FIG. 1 is a conceptual diagram showing an example of a building 2. As shown in FIG.

[building]
The building 2 in this embodiment is illustrated as a house, but may be a building or the like. The building 2 of this embodiment includes an underfloor space 3 and an abovefloor space 4 .

[Underfloor space]
The underfloor space 3 is a space surrounded by the foundation 5, the ground, and the first floor floor 6 (floor material 6a). The foundation 5 is provided with an opening 7 for taking in outside air A1. After the outside air A1 is taken in from the opening 7, it is heat-exchanged via the ground with underground heat whose temperature changes little throughout the year. As a result, the underfloor space 3 can store air that is relatively cooler in summer and relatively warmer in winter than the outside air (hereinafter sometimes simply referred to as "underfloor air").

[Floor space]
The floor space 4 is a space provided above the underfloor space 3 . The above-floor space 4 of this embodiment includes a living room 10 and an attic 8 .

[room]
The living room 10 of the present embodiment is provided on the first floor of the building 2, but may be provided on the second floor or higher. The living room 10 is partitioned by, for example, an outer wall 11, a partition wall 12, a door 13, and the like. The living room 10 of this embodiment includes the first living room 10A and the second living room 10B, but only one of them may be provided, or another living room may be further provided.

[Attic]
The attic 8 is a space surrounded by a ceiling 14 and a roof 15. - 特許庁The ceiling 14 (ceiling forming member 14a) is fixed to, for example, joists (not shown) supported by beams.

[Blower flow path]
In this embodiment, an air flow path 17 including a duct 16 extending inside the building 2 is installed. The air flow path 17 of the present embodiment is connected to an air conditioning unit 18 for ventilating and air conditioning the inside of the building 2, but is not limited to such a mode.

The air flow path 17 of this embodiment has an inlet 17i and an outlet 17o. The air flow path 17 may be provided with a terminal ventilation port (vent cap) attached to the inlet 17i and the outlet 17o, an elbow, or the like. The duct 16 of the present embodiment is exemplified by a flexible duct, but is not particularly limited as long as it can convey air.

A first fan 21 capable of supplying air is connected to the inlet 17i of the airflow path 17 of the present embodiment. As a result, the air supplied from the first fan 21 is conveyed from the inlet 17i to the outlet 17o in the airflow path 17 . As used herein, a "fan" is a machine for pumping air. Therefore, the fan is not particularly limited as long as it can pump air.

The air flow path 17 of this embodiment includes a first air flow path 17A, a second air flow path 17B, and a third air flow path 17C. Note that the air flow path 17 may be provided with any one of the first air flow path 17A to the third air flow path 17C, for example, depending on the number of living rooms 10, or another air flow path ( (illustration omitted) may be further provided.

The air flow path 17 of this embodiment is installed such that at least part of the duct 16 passes through a closed space 24 surrounded by building materials 23 . The closed space 24 of the present embodiment is a space whose interior is difficult to see from the outside, and is not limited to a space completely closed with the building materials 23 .

17 A of 1st air flow paths of this embodiment are installed so that at least one part of the duct 16 may pass through the underfloor space 3 (closed space 24) enclosed by the floor 6 and the foundation 5. As shown in FIG. The second air flow path 17B and the third air flow path 17C are installed such that at least part of the duct 16 passes through the attic 8 (closed space 24) surrounded by the ceiling 14 and the roof 15. there is At least a part of these ducts 16 of the first air flow path 17A to the third air flow path 17C is, for example, between floors (not shown) between the ceiling of the first floor and the floor of the second floor, or a partition It may be installed so as to pass through a closed space including a space (not shown) closed by a wall 12 or the like.

A local portion 25 such as a bend is provided in the air flow path 17 (the first air flow path 17A to the third air flow path 17C) of the present embodiment. Such a local portion 25 may be formed by bending (flexing) the duct 16, or may be formed by connecting the duct 16 to an elbow (not shown) or the like.

[First air flow path]
17 A of 1st ventilation flow paths of this embodiment are for conveying outside air (underfloor air) A1 used for the ventilation in the building 2 to the air conditioning unit 18. As shown in FIG. An inlet 17i of the first airflow path 17A is arranged in the underfloor space 3 . Outside air (underfloor air) A1 is supplied to the inlet 17i by the first fan 21 . On the other hand, the outlet 17o of the first air flow path 17A is connected to the air conditioning unit 18. As shown in FIG. Thereby, the first air flow path 17A can convey outside air (underfloor air) A1 from the inlet 17i to the outlet 17o and supply the air conditioning unit 18 with the air.

[Second air flow path]
The second airflow path 17B of the present embodiment is for conveying the ventilation/air-conditioning air A2 generated by the air conditioning unit 18 to the first living room 10A. An inlet 17i of the second airflow path 17B is connected to the air conditioning unit 18 . Ventilation/conditioning air A2 is supplied to this inlet 17i by a first fan 21 . On the other hand, the outlet 17o of the second air flow path 17B is connected to the first living room 10A. Thereby, the second ventilation flow path 17B can convey the ventilation/air-conditioning air A2 from the inlet 17i to the outlet 17o and supply it to the first living room 10A.

[Third air flow path]
17 C of 3rd ventilation flow paths of this embodiment are for conveying ventilation / air-conditioning air A2 produced|generated by the air conditioning unit 18 to the 2nd living room 10B. An inlet 17i of the third air flow path 17C is connected to the air conditioning unit 18. As shown in FIG. Ventilation/conditioning air A2 is supplied to this inlet 17i by a first fan 21 . On the other hand, the outlet 17o of the third air flow path 17C is connected to the second living room 10B. Thereby, 17 C of 3rd ventilation flow paths can convey ventilation / air conditioning air A2 from the inlet 17i to the outlet 17o, and can supply it to the 2nd living room 10B.

[Air conditioning unit]
The air conditioning unit 18 is for generating ventilation and conditioning air A2. The air conditioning unit 18 of this embodiment includes a chamber 26 and an indoor air conditioner 27 provided inside the chamber 26 .

[Chamber]
The chamber 26 of this embodiment is formed in a box shape having a space inside. A heat insulating material (not shown) may be arranged on the wall portion that divides the space.

The chamber 26 of the present embodiment is connected to the outlet 17o of the first air flow passage 17A so as to be supplied with the outside air (underfloor air) A1. Furthermore, the chamber 26 is provided with an air inlet 28 for taking in at least part of the air (return) A3 of the living room 10 .

[Indoor air conditioner]
The indoor air conditioner 27 of the present embodiment is exemplified by a general household separate air conditioner. The indoor air conditioner 27 is configured as a set with an outdoor unit (not shown) installed outside the building 2 . The indoor air conditioner 27 of this embodiment has an inlet 27a and an outlet 27b.

The suction port 27a is provided adjacent to the air introduction port 28 of the chamber 26 and the outlet 17o of the first air flow path 17A. As a result, air (return air) A3 in living room 10 and outside air (underfloor air) A1 can be supplied to suction port 27a.

Ventilation/air-conditioning air A2 obtained by heat-exchanging the mixed gas (the air A3 in the living room 10 and the outside air A1) is discharged from the outlet 27b. An inlet 17i of the second air flow path 17B and an inlet 17i of the third air flow path 17C are provided downstream of the blow-out port 27b. As a result, the air conditioning unit 18 supplies the ventilation/conditioned air A2 to the living room 10 (in this example, the first living room 10A and the second living room 10B) through the second air flow path 17B and the third air flow path 17C. can do.

In this way, the building 2 of the present embodiment supplies outside air (underfloor air) A1 to the air conditioning unit 18 through the air flow paths 17 (first air flow path 17A to third air flow path 17C), Conditioned air A2 can be supplied to the living room 10 . Therefore, the building 2 can ventilate and air-condition the living room 10 . In order to efficiently perform such ventilation and air conditioning, it is important that the air volume necessary for ventilation and air conditioning is secured in the air flow passages 17 (first air flow passage 17A to third air flow passage 17C). be.

[Building manufacturing method]
Next, a method for manufacturing the building 2 of the present embodiment (hereinafter sometimes simply referred to as "manufacturing method") will be described. In the manufacturing method of the present embodiment, the building 2 is manufactured based on the same procedure as the conventional manufacturing method, except that the evaluation method described below is included.

In the manufacturing method of the present embodiment, first, after the construction of the foundation 5, the framework (not shown) such as columns and beams, and the outer wall 11, etc., the air flow path 17 including the duct 16 (in this example, , the first air flow path 17A to the third air flow path 17C). After that, in the manufacturing method of the present embodiment, the closed space 24 (in this example, the underfloor space 3, the attic 8, etc.) through which the duct 16 passes is replaced by the building materials 23 (in this example, the ceiling forming material 14a, the flooring material 6a, etc.). , and the air conditioning unit 18 and the like are installed.

By the way, when the duct 16 is routed inside the building 2, the duct 16 may be bent or crushed unexpectedly. These bends, crushes, and the like increase the pressure loss of the duct 16, making it difficult to secure the air volume required for ventilation and air conditioning. After the closed space 24 (in this example, the underfloor space 3, the attic 8, etc.) is closed with the building materials 23 (in this example, the ceiling forming material 14a, the flooring 6a, etc.) If found, it is necessary to temporarily remove the building material 23 and repair the construction state of the duct 16 .

[Method for Evaluating Construction State of Blower Channel (First Embodiment)]
In this embodiment, in the process of manufacturing the building 2, the construction state of the air flow path 17 including the duct 16 extending inside the building 2 is evaluated. The evaluation method of the present embodiment is executed before the closed space 24 (in this example, the underfloor space 3, the attic 8, etc.) is closed with the building materials 23 (in this example, the ceiling forming material 14a, the flooring material 6a, etc.). be done.

In the present embodiment, the construction state of the first air flow path 17A to the third air flow path 17C is evaluated, but only some of them may be evaluated according to the construction state (routing of the duct 16). . Moreover, a computer etc. may be used for implementation of the evaluation method. FIG. 2 is a flow chart showing an example of a processing procedure of a method for evaluating the construction state of the air flow path. FIG. 3 is a conceptual diagram for explaining an example of a method for evaluating the construction state of air flow passages. FIG. 3 simplifies and shows an example of the evaluation method of the construction state of 17 A of 1st air flow paths.

[Supply air]
In the evaluation method of this embodiment, first, as shown in FIG. is supplied with air A4 at a predetermined air volume (step S1). The second fan 22 is not particularly limited as long as the air volume is smaller than that of the first fan 21 . Since the second fan 22 consumes less power (air volume) than the first fan 21 , it can be operated with power supplied from a temporarily installed power supply device (power supply, storage battery, etc.) 29 . As a result, in the evaluation method of the present embodiment, for example, before the installation work of the first fan 21 and the electrical work necessary for the operation of the first fan 21 are performed, the inlet 17i of the air flow path 17 , air A4. Therefore, the evaluation method of the present embodiment enables early evaluation of the construction state of the duct 16 .

In step S<b>1 of the present embodiment, first, the second fan 22 is installed at the inlet 17 i of the airflow passage 17 . An adapter 31 may be provided between the inlet 17i and the second fan 22 to prevent gaps between them. Power is supplied to the second fan 22 of the present embodiment from a temporary power supply device (power supply, storage battery, etc.) 29 . Next, in step S1 of the present embodiment, the operation of the second fan 22 is started, and air A4 is supplied to the inlet 17i of the air flow path 17 at a predetermined air volume.

The air volume is not particularly limited as long as it is measurable at the outlet 17o of the airflow passage 17 in the next step S2. The air volume in this embodiment is appropriately set based on the specifications of the second fan 22 .

As shown in FIG. 1, the air flow path 17 of the present embodiment is designed to supply air (outside air A1 or ventilation/air-conditioning air A2 in this example) supplied from the first fan 21 after the building 2 is manufactured. ) is intended to be conveyed from the inlet 17i to the outlet 17o. Therefore, in step S1, as shown in FIG. 3, air A4 is supplied from the second fan 22 to the inlet 17i of the airflow passage 17, and the air is conveyed by the first fan 21. can be simulated before the first fan 21 is installed.

[Measure air volume]
Next, in the evaluation method of the present embodiment, the air volume at the inlet 17i or the outlet 17o of the airflow passage 17 is measured (step S2). In step S2 of the present embodiment, the air volume at the outlet 17o of the air A4 conveyed from the inlet 17i to the outlet 17o of the air flow path 17 is measured. The air volume can be appropriately measured based on conventional methods. A known air flow meter 32 is used in step S2 of the present embodiment. A vane-type air flow meter (for example, "testo417" manufactured by Testo Corporation) is adopted as the air flow meter 32 of the present embodiment. Such an air volume meter 32 can accurately measure the air volume, for example, when the inner diameter of the duct 16 is small and the wind speed at the measurement position is high. The air volume meter 32 is not limited to the vane type air volume meter, and for example, a hot wire type air volume meter may be used. Such a hot-wire air flow meter can accurately measure the air volume, for example, when the inner diameter of the duct 16 is large and the wind speed at the measurement position is slow. Also, an adapter 33 may be provided between the air flow meter 32 and the outlet 17o to prevent a gap therebetween.

In step S2, the method is not limited to measuring the air volume at the outlet 17o of the airflow passage 17, and the air volume at the inlet 17i of the airflow passage 17 may be measured. Since the inlet 17i and the outlet 17o of the air flow path 17 are sealed, the air volume at the inlet 17i and the air volume at the outlet 17o are equal. Therefore, in step S2, by measuring the air volume at the inlet 17i, the same measurement result as when measuring the air volume at the outlet 17o is obtained.

When the air volume at the inlet 17i of the air flow path 17 is measured, the supply of the air A4 in step S1 and the measurement of the air volume in step S2 can be performed at the inlet 17i. Thus, in the evaluation method, for example, it is not necessary to arrange an operator for supplying the air A4 at the inlet 17i and an operator for measuring the air volume at the outlet 17o, so the construction state of the duct can be easily evaluated. It becomes possible to

When the air volume at the inlet 17i of the air flow path 17 is measured, an air volume meter 32 may be arranged between the second fan 22 and the inlet 17i, or may be placed at the suction port of the second fan 22. , an air flow meter 32 may be arranged. The measurement result of the air volume is recorded, for example, in a computer (not shown).

[Determine threshold for air volume]
Next, in the evaluation method of the present embodiment, a predetermined threshold for air volume is determined (step S3). Step S3 of the present embodiment is performed prior to step S4 of evaluating the construction state, which will be described later. Note that step S3 may be performed as appropriate (for example, before step S1 and step S2) as long as it is before step S4 of evaluating the construction state is performed.

In step S3 of the present embodiment, first, a first curve indicating the relationship between the static pressure of the second fan 22 and the air volume, and a second curve indicating the relationship between the pressure loss and the air volume in the air flow path 17 are obtained. be done. FIG. 4 is a graph showing an example of the first curve C1 and the second curve C2.

For the first curve C1, for example, the "air volume-static pressure characteristic" published by the manufacturer of the second fan 22 (shown in FIG. 3) is used. With such a first curve C1, the air volume supplied by the second fan 22 can be specified with respect to the pressure loss (static pressure) of the device (such as a duct) in which the second fan 22 is installed.

The second curve C2 is obtained by a known method, for example, based on the design factors of the airflow passage 17 shown in FIG. Therefore, it is required as appropriate. In the present embodiment, for example, the second curve can be obtained by substituting the variables of the detailed method (formula A) for calculating the pressure loss of the duct based on the design factors of the air flow path 17 . For details of the detailed method (formula A), see, for example, a document (Ministry of Land, Infrastructure, Transport and Tourism, Housing Bureau, etc., "Manual for Building Sick House Countermeasures Corresponding to the Revised Building Standards Law", Kogaku Tosho, November 2003, p. 248-249).

When the evaluation method of this embodiment is executed, for example, if the air flow path 17 is not provided with an external terminal ventilation opening (not shown) or an indoor terminal ventilation opening (not shown), the detailed method In (A formula), assignments to variables related to these can be omitted. Thereby, the second curve C2 can be easily obtained in the evaluation method of the present embodiment.

Such a second curve C2 corresponds to the amount of air supplied to the air flow path 17 when the air flow path 17 is installed according to the design factors (that is, the duct 16 is not defective in construction). On the other hand, the pressure loss occurring in the air flow path 17 can be identified. The second curve C2 indicates that the pressure loss increases as the air volume increases.

Next, in step S3 of the present embodiment, a threshold for the air volume of the second fan 22 is determined based on the air volume W at the intersection point P between the first curve C1 and the second curve C2. The air volume W at the intersection point P is obtained when air A4 is supplied from the second fan 22 to the inlet 17i of the air flow path 17 where there is no problem in the construction state of the duct 16 (for example, unexpected bending or collapse). shows the amount of wind predicted to be discharged from the outlet 17o. Therefore, if the air volume at the inlet 17i or the outlet 17o measured in step S2 is less than the air volume W at the intersection point P, it can be determined that there is a high possibility that the duct 16 is defective in construction. By setting the threshold for the air volume of the second fan 22 based on the air volume W at the intersection point P, it is possible to appropriately evaluate the construction state of the duct 16 .

As the threshold value, the air volume W at the intersection P may be used as it is. Note that the threshold is determined as appropriate in consideration of, for example, an error in the air volume of the second fan 22 and an error in measuring the air volume at the inlet 17i or the outlet 17o (that is, the air volume W at the intersection point P is A smaller value or a value larger than the air volume W at the intersection point P may be determined). The threshold is recorded, for example, in a computer or the like.

[Evaluate the construction status of the duct]
Next, in the evaluation method of the present embodiment, the construction state of the duct 16 is evaluated based on the measured air volume and a predetermined threshold for the air volume (for example, the air volume W at the intersection point P in FIG. 4). (step S4). In step S4 of the present embodiment, it is determined whether or not the measured air volume at the inlet 17i or the outlet 17o is equal to or greater than a threshold value.

In step S4, if the air volume at the inlet 17i or the outlet 17o is equal to or greater than the threshold value ("Yes" in step S4), there is a possibility that there is no defect in the construction state of the duct 16 (for example, unexpected bending, crushing, etc.). is high. In this case, in step S4, the construction state of the duct 16 is evaluated as good.

On the other hand, in step S4, if the air volume at the inlet 17i or the outlet 17o is less than the threshold value ("No" in step S4), there is a problem in the construction state of the duct 16 (for example, unexpected bending, crushing, etc.). Probability is high. In this case, in step S4, it is evaluated that the construction state of the duct 16 is not good.

Thus, the evaluation method of the present embodiment can easily evaluate whether the construction state of the duct 16 is good or bad before the closed space 24 is closed with the building material 23 (shown in FIG. 1). Therefore, in the evaluation method of this embodiment, for example, when the construction state of the duct 16 is not good, there is no need to once remove the building material 23 that closed the closed space 24 in order to repair the construction state. It is possible to suppress an increase in the manufacturing cost of

In the evaluation method of the present embodiment, the second fan 22 ( 3) is used. Therefore, according to the evaluation method of the present embodiment, the construction state of the duct 16 can be evaluated early before the first fan 21 is installed. Furthermore, the evaluation method of the present embodiment does not require electrical work required for installing the first fan 21, for example. Therefore, the evaluation method of this embodiment can evaluate the construction state of the duct 16 at an early stage.

[Close Closed Space]
In the evaluation method (manufacturing method) of the present embodiment, when the air volume at the inlet 17i or the outlet 17o is equal to or greater than the threshold value (“Yes” in step S4), as shown in FIG. is closed (step S5). As a result, in the evaluation method (manufacturing method) of the present embodiment, the closed space 24 is closed with the building material 23 in a state in which there is no defect in the construction state of the duct 16 (for example, unexpected bending, crushing, etc.). And the building 2 that can be efficiently air-conditioned can be reliably manufactured.

[Renovation of duct construction status]
In the evaluation method (manufacturing method) of the present embodiment, when the air volume at the inlet 17i or the outlet 17o is less than the threshold ("No" in step S4), the air volume at the inlet 17i or the outlet 17o is set to be equal to or greater than the threshold. Then, the construction state of the duct 16 is repaired (step S6). In step S6 of the present embodiment, defects in the construction state of the duct 16 (for example, unexpected bending, crushing, etc.) are identified, and the defects are repaired. In this embodiment, the construction state of the duct 16 can be quickly repaired without removing the building material 23, so an increase in manufacturing cost of the building 2 can be suppressed.

In the evaluation method of the present embodiment, it is desirable that steps S1 to S4 are performed again after the construction state of the duct 16 is repaired (after step S6 is performed). As a result, in the evaluation method (manufacturing method) of the present embodiment, the construction state of the duct 16 is reliably repaired until the air volume at the entrance 17i or the exit 17o reaches a threshold value or more, so ventilation and air conditioning are performed efficiently. The building 2 capable of doing so can be reliably manufactured. If there is no change in the design factor of the air flow path 17, the threshold for the air volume is also not changed, so the step S3 of determining the threshold may be omitted.

[Method for Evaluating Construction Condition of Blower Channel (Second Embodiment)]
In the evaluation method of the present embodiment, the step S3 of determining the threshold is performed, but the present invention is not limited to such a mode. For example, when the design factor of the air flow path 17 installed in the building 2 and the design factor of the air flow path 17 installed in another previously manufactured building (not shown) are common, other Thresholds obtained during building manufacture may be used. Accordingly, in the evaluation method of this embodiment, the step S3 of determining the threshold value is omitted, so the construction state of the duct 16 can be evaluated more quickly.

[Method for Evaluating Construction Condition of Blower Channel (Third Embodiment)]
In the previous embodiments, the air volume at the inlet 17i or the outlet 17o of the airflow passage 17 was measured, and the installation state of the duct was evaluated based on the measured air volume and the threshold for the air volume. It is not limited to such an aspect. FIG. 5 is a flow chart showing an example of a processing procedure of a method for evaluating the construction state of a ventilation passage according to another embodiment of the present invention. In this embodiment, the same reference numerals are assigned to the same configurations as in the previous embodiments, and the description may be omitted.

[Supply air]
In the evaluation method of this embodiment, first, air is supplied at a predetermined air volume to the inlet 17i of the airflow passage 17 using the second fan 22 with a constant air volume (step S7). The constant air volume second fan 22 is controlled in rotation speed so as to maintain a constant air volume. Therefore, the rotation speed of the second fan 22 increases as the pressure loss generated in the air flow path 17 increases. Note that the air volume of the second fan 22 is not particularly limited, and is appropriately set based on the specifications of the second fan 22 . Also, the installation of the second fan 22 and the like can be performed based on the same procedure as in the previous embodiments.

[Measure the rotation speed of the second fan]
Next, in the evaluation method of this embodiment, the rotation speed of the second fan 22 is measured (step S8). The rotation speed of the second fan 22 can be measured as appropriate. In step S8 of this embodiment, for example, the number of revolutions measured by a control device (not shown) that controls the second fan 22 is read, or a known tachometer (eg, "testo460" manufactured by Testo Co., Ltd.) can measure the rotation speed of the second fan 22 . The measurement result of the air volume is recorded, for example, in a computer (not shown).

[Measure the threshold for the number of revolutions]
Next, in the evaluation method of this embodiment, a predetermined threshold for the number of revolutions is determined (step S9). Step S9 of this embodiment is performed prior to step S10 of evaluating the construction state, which will be described later. Note that step S9 may be appropriately performed (for example, performed before steps S7 and S8) before step S10 for evaluating the construction state is performed.

In step S9 of this embodiment, first, a second curve representing the relationship between the pressure loss of the air flow path 17 and the air volume is acquired based on the procedure of the previous embodiments. FIG. 6(a) is a graph showing an example of the second curve C2.

Next, in step S9 of this embodiment, as shown in FIG. 6A, air with an air volume (constant air volume of the second fan 22) X is supplied to the air flow path 17 on the second curve C2. The pressure loss when the This pressure loss is due to the fact that air A4 with a constant air volume X is supplied from the second fan 22 to the inlet 17i of the airflow passage 17 where there is no problem in the construction state of the duct 16 (for example, unexpected bending or collapse). 2 shows the static pressure Y of the second fan 22 in this case.

Next, in step S9 of this embodiment, the relationship between the static pressure and the rotational speed of the second fan 22 is obtained. The relationship between the static pressure and the number of rotations of the second fan 22 is obtained, for example, from technical data published by the manufacturer of the second fan 22 or the like. FIG. 6B is a graph showing the relationship between the static pressure of the second fan 22 and the rotation speed.

Next, in step S9 of this embodiment, as shown in FIG. 2, the rotation speed Z of the fan 22 is specified. Then, in step S9, based on the rotation speed Z, a threshold for the rotation speed of the second fan 22 is determined.

The number of rotations Z of the second fan 22 at the static pressure Y is determined by supplying air A4 with a constant air volume X from the second fan 22 to the inlet 17i of the air flow path 17 where the duct 16 is not defective in the construction state. It shows the rotation speed of the second fan 22 in the case. Therefore, when the rotation speed of the second fan 22 measured in step S8 is equal to or higher than the rotation speed Z, the rotation speed of the second fan 22 is increased due to the pressure loss in the air flow path 17. , it can be determined that there is a high possibility that the construction state of the duct 16 is defective. By setting the threshold value for the rotation speed of the second fan 22 based on such rotation speed Z, it becomes possible to appropriately evaluate the construction state of the duct 16 .

The rotation speed Z at the static pressure Y may be used as it is for the threshold value. Note that the threshold is determined as appropriate (that is, a value smaller than the number of revolutions Z, or a value smaller than the number of revolutions Z or is also determined to be a large value). The threshold is recorded, for example, in a computer or the like.

[Evaluate the construction status of the duct]
Next, in the evaluation method of this embodiment, the construction state of the duct 16 is evaluated based on the measured number of revolutions and a predetermined threshold for the number of revolutions (step S10). In step S10 of this embodiment, it is determined whether the measured number of rotations is equal to or greater than a threshold value.

In step S10, if the measured number of revolutions is less than the threshold value ("Yes" in step S10), there is a high possibility that the duct 16 has no defects (for example, unexpected bending or crushing). In this case, in step S10, the construction state of the duct 16 is evaluated as good.

On the other hand, in step S10, if the measured number of rotations is equal to or greater than the threshold value (“No” in step S10), there is a possibility that the duct 16 has a defect (for example, unexpected bending, crushing, etc.). expensive. In this case, in step S10, the construction state of the duct 16 is evaluated as not good.

As described above, the evaluation method of this embodiment is similar to the evaluation methods of the previous embodiments, and before the closed space 24 is closed with the building material 23 (shown in FIG. 1), the quality of the construction state of the duct 16 is evaluated. can be easily evaluated. Therefore, in the evaluation method of this embodiment, for example, when the construction state of the duct 16 is not good, there is no need to temporarily remove the building material 23 that closed the closed space 24 in order to repair the construction state. It is possible to suppress an increase in the manufacturing cost of

Although the particularly preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments and can be modified in various ways.

S1 Step of supplying air to the inlet of the airflow channel S2 Step of measuring the air volume at the inlet or outlet of the airflow channel S4 Step of evaluating the construction state of the duct

Claims (10)

A method for evaluating the construction state of a ventilation channel including a duct extending through the building in the process of manufacturing a building, comprising:
The blowing channel has an inlet and an outlet and is destined to convey air supplied by the first fan from the inlet to the outlet, and at least part of the duct is installed so as to pass through a closed space surrounded by building materials,
Before the closed space is closed with the building material, the method includes:
a step of supplying air at a predetermined air volume to the inlet of the air flow path using a second fan having an air volume smaller than that of the first fan;
measuring the air volume at the inlet or the outlet of the airflow channel;
evaluating the construction state of the duct based on the measured air volume and a predetermined threshold for the air volume;
A method for evaluating the construction state of air flow passages. 2. The method for evaluating a construction state of a blast passage according to claim 1, wherein said step of evaluating evaluates that the construction state of said duct is good when the air volume at said inlet or said outlet is equal to or greater than said threshold value. . 3. The method for evaluating construction status of a ventilation passage according to claim 1, further comprising closing said closed space with said building material when the air volume at said inlet or said outlet is equal to or greater than said threshold value. 4. The blast flow according to any one of claims 1 to 3, wherein the evaluating step evaluates that the construction state of the duct is not good when the air volume at the inlet or the outlet is less than the threshold value. Road construction condition evaluation method. 2. The method of claim 1, further comprising, when the air volume at the entrance or the exit is less than the threshold value, modifying the construction state of the duct so that the air volume at the entrance or the exit becomes equal to or greater than the threshold value. 5. The method for evaluating the construction state of the air flow path according to any one of items 1 to 4. Prior to the evaluating step, further comprising determining the threshold;
The step of determining the threshold is performed at the intersection of a first curve showing the relationship between the static pressure of the second fan and the air volume and a second curve showing the relationship between the pressure loss and the air volume of the airflow passage. 6. The method for evaluating the construction state of the airflow path according to claim 1, wherein the threshold value is determined based on air volume. A method for evaluating the construction state of a ventilation channel including a duct extending through the building in the process of manufacturing a building, comprising:
The blowing channel has an inlet and an outlet and is destined to convey air supplied by the first fan from the inlet to the outlet, and at least part of the duct is installed so as to pass through a closed space surrounded by building materials,
Before the closed space is closed with the building material, the method includes:
using a second fan with a constant air volume to supply air at a predetermined air volume to the inlet of the air flow path;
measuring the rotation speed of the second fan;
Evaluating the construction state of the duct based on the measured number of rotations and a predetermined threshold for the number of rotations.
A method for evaluating the construction state of air flow passages. 8. The method for evaluating construction condition of a blast passage according to claim 7, wherein said step of evaluating evaluates that the construction condition of said duct is good when said measured number of rotations is less than said threshold value. 9. The method for evaluating construction condition of a ventilation passage according to claim 7 or 8, wherein said step of evaluating evaluates that said duct construction condition is not good when said measured number of revolutions is equal to or greater than said threshold value. A method for manufacturing a building having an airflow passage including a duct extending through the building,
A method for manufacturing a building, comprising the method for evaluating the construction state of a ventilation passage according to any one of claims 1 to 9.

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