Method for running test of airtightness of air-conditioning chamber

Abstract

To provide an easily executable method for running a test of airtightness of an air-conditioning chamber.SOLUTION: A method for running a test of the airtightness of an air-conditioning chamber is for running a test of airtightness of an air-conditioning chamber having an unnecessary gap under the floor of an air-conditioning target space. The method includes: a connection step of connecting a suction-air sending device in an airtight manner to a ventilation hole as one of a plurality of through-holes formed in a floor; a blocking step of blocking the through-holes other than the ventilation hole; a driving step of driving the suction-air sending device after the connection step and the blocking step; and an acquisition step of acquiring the differential pressure between the air pressure of the air-conditioning chamber and the air pressure of the air-conditioning target space during driving of the suction-air sending device.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an air-conditioning chamber airtightness testing method for testing the air-tightness of an air-conditioning chamber having an unnecessary gap formed under the floor of a space to be air-conditioned. [Background technology]

[0002] In some cases, an apartment building or an office building adopts an air conditioning system (floor chamber air conditioning system) in which the space under the double floor is used as an air conditioning chamber, conditioned air blown from an air conditioner is circulated through the air conditioning chamber, and the conditioned air is blown out from a through hole (floor outlet) formed in the double floor. In such an air conditioning system, it is required that the air conditioning chamber ensures a certain level of airtightness so that a predetermined amount of conditioned air is blown out from the floor outlet. For this reason, it is desirable to carry out an airtightness test of the air conditioning chamber when constructing an apartment building or an office building. Patent Document 1 discloses an airtightness evaluation method for locally evaluating the airtightness of a part of a measured object (for example, a gap in a door or window of a building) by removing the influence of the shape of the gap in the measured object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6644615 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the airtightness evaluation method described in Patent Document 1 does not test the airtightness of the entire space, that is, the air-conditioning chamber. In addition, there is a demand for facilitating the airtightness test of the air-conditioning chamber so that the airtightness of a large number of air-conditioning chambers can be tested.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide an easily executable method for testing the airtightness of an air-conditioning chamber. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the airtightness testing method for an air-conditioned chamber according to the present disclosure is a method for testing the airtightness of an air-conditioned chamber having an unnecessary gap formed under the floor of a space to be air-conditioned, and includes a connecting step of airtightly connecting a suction / blowing device to a vent hole, which is one of a plurality of through holes formed in the floor, a closing step of blocking the plurality of through holes excluding the vent hole, a driving step of driving the suction / blowing device after the connecting step and the closing step, and an acquisition step of acquiring the differential pressure between the air pressure in the air-conditioned chamber and the air pressure in the space to be air-conditioned while the suction / blowing device is operating. Effect of the Invention

[0007] According to the method for testing the airtightness of an air-conditioning chamber of the present disclosure, it is possible to provide an easily executable method for testing the airtightness of an air-conditioning chamber. [Brief description of the drawings]

[0008] [Figure 1] 1A to 1C are diagrams illustrating an airtightness test method for an air conditioning chamber according to an embodiment of the present invention; [Diagram 2] 1 is a flow chart of a method for testing the air tightness of an air conditioning chamber according to an embodiment. [Diagram 3] 4 is a graph showing the relationship between air volume and static pressure of a blower device according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a method for testing the airtightness of an air-conditioning chamber according to an embodiment of the present disclosure will be described with reference to the drawings. The embodiment shows one aspect of the present disclosure, and does not limit the present disclosure. The embodiment can be arbitrarily modified within the scope of the technical idea of ​​the present disclosure.

[0010] The airtightness testing method for an air-conditioning chamber according to the present disclosure is a method for testing the airtightness of an air-conditioning chamber 50 formed under the floor of an air-conditioned space 100. Fig. 1 is a diagram showing a schematic view of an airtightness testing method for an air-conditioning chamber 50 according to one embodiment.

[0011] As shown in FIG. 1, the building 102 includes an upper wall 104, a lower wall 106 located below the upper wall 104, and a side wall 108 connecting the upper wall 104 and the lower wall 106. The building 102 is surrounded by the upper wall 104, the lower wall 106, and the side wall 108 to form an internal space 103. The building 102 includes a floor 110 that divides the internal space 103 into an air-conditioned space 100 and an air-conditioned chamber 50. The floor 110 is disposed between the upper wall 104 and the lower wall 106, and covers the air-conditioned chamber 50 from above. The floor 110 is formed with a plurality of through holes 112 that communicate between the air-conditioned space 100 and the air-conditioned chamber 50. At least one of the lower wall 106, the side wall 108, and the floor 110 that surround the air-conditioned chamber 50 has a gap 113 that is unnecessary for air conditioning. The total area of ​​the gaps 113 needs to be as small as possible so that a predetermined volume of conditioned air can be blown out from the through-holes 112. Such a building 102 employs an air conditioning system (floor chamber air conditioning system) that circulates conditioned air blown out from an air conditioner (not shown) into the air-conditioned chamber 50 and blows out the conditioned air from the through-holes 112.

[0012] 2 is a flowchart of an airtightness test method for the air-conditioning chamber 50 according to one embodiment. As shown in FIG. 2, the airtightness test method for the air-conditioning chamber 50 includes an arrangement step S1, a connection step S2, a closing step S3, a driving step S4, and an acquisition step S5.

[0013] In the arrangement step S1, the suction / blowing device 2 and the differential pressure gauge 5 are arranged in the air-conditioned space 100. In one embodiment, the suction / blowing device 2 is a constant air volume type air blower 2A(2) configured to be able to send air at a preset air volume to the air-conditioned chamber 50. The differential pressure gauge 5 acquires the difference between the air pressure in the air-conditioned space 100 and the air pressure in the air-conditioned chamber 50.

[0014] In one embodiment, as shown in FIG. 1, the blower device 2A includes a main body 4 that blows out air A, and a duct 6 that connects the main body 4 to a ventilation hole 3 (112) that is one of a plurality of through holes 112. The duct 6 has a flow path through which the air A flows, and is deformable. The blower device 2A is configured to be able to blow air at a preset air volume to the air-conditioning chamber 50, regardless of the shape (e.g., length) and state (e.g., bent state) of the duct 6 and the shape (e.g., hole diameter and length) of the ventilation hole 3 and the difference in ventilation resistance due to the specification of the gap 113. The difference in ventilation resistance of the gap 113 is mainly determined by the size of the total area of ​​the gap 113.

[0015] The configuration of the blower device 2A according to the present disclosure is not particularly limited as long as it is capable of blowing air at a preset volume into the air-conditioning chamber 50. For example, the blower device 2A may be configured to control the volume of air based on the difference between atmospheric pressure and the internal pressure of the blower device 2A, or may be configured to control the volume of air based on the relationship between the rotation speed of the fan of the blower device 2A and the voltage or current applied to the blower device 2A.

[0016] FIG. 3 is a graph (PQ characteristic graph) showing the relationship between air volume and static pressure of air blower 2A according to one embodiment, with the horizontal axis representing air volume and the vertical axis representing static pressure. As shown in FIG. 3, air blower 2A is configured so that the air volume delivered to air-conditioning chamber 50 is constant in the static pressure range of 0 Pa or more and 160 Pa or less. More specifically, air blower 2A is configured so that it can deliver air to air-conditioning chamber 50 at a first air volume V1 and a second air volume V2 smaller than the first air volume V1 in the static pressure range of 0 Pa or more and 160 Pa or less. In the embodiment illustrated in FIG. 3, air blower 2A delivers a first air volume V1 (approximately 180 m 3 / h), and the second air volume V2 (approximately 100 m 3 / h) or weak mode m2.

[0017] In the connection step S2, the blower 2A is airtightly connected to the ventilation hole 3. In one embodiment, the tip of the duct 6 is connected to the ventilation hole 3. Then, in order to prevent air A from leaking from the duct 6, the tip of the duct 6 and the ventilation hole 3 are adhered to each other with tape 8.

[0018] In the closing step S3, each of the multiple through holes 112 except for the ventilation hole 3 is closed. The method for closing the through holes 112 is not particularly limited, but for example, the through holes 112 are closed with a vinyl cover. A differential pressure gauge 5 is inserted into one of the multiple through holes 112. The differential pressure gauge 5 is airtightly connected to the through hole 112.

[0019] 2, the blocking step S3 is executed after the connecting step S2, but the present disclosure is not limited to this embodiment. The blocking step S3 may be executed before the connecting step S2, or may be executed in parallel with the connecting step S2.

[0020] In the driving step S4, after the connecting step S2 and the closing step S3, the blower device 2A is driven. By driving the blower device 2A, the air pressure in the air-conditioning chamber 50 is quickly increased.

[0021] In acquisition step S5, while the blower 2A is operating, the differential pressure gauge 5 is used to acquire the differential pressure between the air pressure in the air-conditioned chamber 50 and the air pressure in the air-conditioned space 100. Specifically, once the value on the differential pressure gauge 5 has stabilized (approximately 15 seconds have passed) since the blower 2A started operating, the differential pressure is acquired using the differential pressure gauge 5. If this acquired differential pressure is greater than a preset value (e.g., 50 Pa), it is determined that the airtightness of the air-conditioned chamber 50 meets a certain level. In some embodiments, the value obtained by dividing the gap area calculated from the set air volume and the acquired differential pressure by the floor area is set to a preset value (e.g., 1.0 cm 2 / m 2 ), it is determined that the airtightness of the air-conditioning chamber 50 meets a certain standard.

[0022] (Action and effect) The action and effect of the airtightness test method for an air-conditioning chamber according to one embodiment will be described. Conventionally, in order to evaluate the airtightness of a target space, it was necessary to take into account the characteristics of the gap formed in the wall covering the target space, obtain measured values ​​such as air volume under a plurality of differential pressure conditions, about five, and calculate an evaluation value for evaluating the airtightness by regression from these measured values. For this reason, a dedicated device capable of evaluating the airtightness of the target space was required, and a skilled worker was required to operate this dedicated device. However, when the target space is an air-conditioning chamber 50, the characteristics of the gap are almost constant. For this reason, the above-mentioned calculation and dedicated device are not required.

[0023] According to one embodiment, the airtightness test of the air-conditioned chamber 50 can be completed by preparing the air blower 2A and the differential pressure gauge 5 (both of which are more general-purpose than the above-mentioned dedicated device). Therefore, neither the above-mentioned dedicated device nor a skilled worker is required, and an easily executable airtightness test method for the air-conditioned chamber can be provided. Furthermore, by facilitating the airtightness test of the air-conditioned chamber 50, the number of airtightness tests of the air-conditioned chambers 50 per unit time can be increased. Therefore, the construction period for the building 102 can be shortened.

[0024] When the volume of air blown into the target space to be evaluated for airtightness changes due to disturbance, a device for measuring this volume of air is required. In addition, since the characteristics of the gaps in the air-conditioned chamber 50 are almost constant, the airtightness can be evaluated based on one differential pressure in a state in which a constant volume of air flows in. According to one embodiment, since the constant volume type blower 2A is used, it is not necessary to measure the volume of air, and the airtightness test method for the air-conditioned chamber can be further simplified. Furthermore, according to one embodiment, the blower 2A and the differential pressure gauge 5 are arranged in the air-conditioned space 100 in the building 102, so that the airtightness of the air-conditioned chamber 50 can be tested while suppressing the influence of weather and the like.

[0025] According to one embodiment, the blower device 2A is configured to be able to blow a preset amount of air into the air-conditioned chamber 50 regardless of the shape and condition of the duct 6, the shape of the ventilation hole 3, and the size of the total area of ​​the gap 113 (differences in ventilation resistance due to the specifications of the gap 113), so that the airtightness can be evaluated based on a single differential pressure when a constant amount of air is flowing into the air-conditioned chamber 50.

[0026] In order to evaluate the airtightness of the air-conditioned chamber 50 based on one pressure difference, it is desirable to raise the air pressure in the air-conditioned chamber 50 to a certain degree (at least 30 Pa or more) by the blower 2A. According to one embodiment, the blower 2A blows air to the air-conditioned chamber 50 at a first air volume V1 in a static pressure range of 0 Pa or more and 160 Pa or less. Therefore, the airtightness of the air-conditioned chamber 50 can be evaluated with high accuracy based on one pressure difference.

[0027] For example, when the total area of ​​the gaps 113 is relatively small, the airflow resistance of the air blower 2A increases, and the air blower 2A may not be able to blow air to the air-conditioned chamber 50 at the first airflow rate V1. According to one embodiment, the air blower 2A blows air to the air-conditioned chamber 50 at a second airflow rate V2 that is smaller than the first airflow rate V1 in a static pressure range of 0 Pa or more and 100 Pa or less. Then, the airtightness of the air-conditioned chamber 50 is evaluated based on the pressure difference when air is being blown to the air-conditioned chamber 50 at the second airflow rate V2. This makes it possible to increase the number of air-conditioned chambers 50 whose airtightness can be evaluated.

[0028] In addition, in the case where the blower device 2A is capable of blowing air into the air-conditioning chamber 50 at a first air volume V1, by measuring the air blowing and the differential pressure at the first air volume V1 and the second air volume V2, it is possible to accurately evaluate the airtightness based on these two sets of air volumes and differential pressures.

[0029] In one embodiment, the suction / blower device 2 is a constant air volume type blower device 2A, but the present disclosure is not limited to this form. The suction / blower device 2 may be a constant air volume type suction device configured to be able to suck in a preset air volume from the air-conditioning chamber 50. The suction / blower device 2 may be a variable air volume type blower device that can variably set the air volume to be blown into the air-conditioning chamber 50. The suction / blower device 2 may be a variable air volume type suction device that can variably set the air volume to be sucked in from the air-conditioning chamber 50.

[0030] The contents described in each of the above embodiments can be understood, for example, as follows.

[0031] [1] The method for testing an air-tightness of an air-conditioning chamber according to the present disclosure comprises: 1. A method for testing the airtightness of an air-conditioning chamber (50) having an unnecessary gap (113) formed under a floor (110) of a space (100) to be air-conditioned, comprising: a connecting step (S2) of airtightly connecting a suction / air blowing device (2) to a ventilation hole (3) which is one of a plurality of through holes (112) formed in the floor; A closing step (S3) of closing the plurality of through holes except for the ventilation holes; a driving step (S4) of driving the suction / blower device after the connecting step and the closing step; and acquiring (S5) a differential pressure between the air pressure in the air-conditioning chamber and the air pressure in the space to be air-conditioned while the suction / blowing device is operating.

[0032] Conventionally, in order to evaluate the airtightness of a target space, it was necessary to take into account the characteristics of the gaps formed in the walls surrounding the target space, obtain measurements such as air volume under multiple differential pressure conditions, and calculate an evaluation value for evaluating the airtightness by regression from the multiple sets of air volume and differential pressure measurements. For this reason, a dedicated device capable of evaluating the airtightness of the target space was required, and a skilled worker was required to operate this dedicated device. However, when the target space is an air-conditioning chamber, the characteristics of the gaps are almost constant. For this reason, the above-mentioned calculations and dedicated devices are not required.

[0033] According to the method described in [1] above, by preparing a suction / blowing device and a differential pressure gauge capable of acquiring the differential pressure between the air pressure in the air-conditioned chamber and the air pressure in the space to be air-conditioned, it is possible to provide an easily executable air-tightness test method for the air-conditioned chamber. Furthermore, by facilitating the air-tightness test of the air-conditioned chamber, it is possible to increase the number of air-conditioned chambers that are air-tight tested per unit time.

[0034] [2] In some embodiments, in the configuration described in [1] above, The suction / blower device is a constant air volume type blower (2A) configured to be able to blow air at a preset air volume into the air-conditioning chamber, The method further includes, before the connecting step, an arrangement step (S1) of arranging the constant air volume type blower in the space to be air conditioned.

[0035] When the volume of air blown into the space to be evaluated for airtightness changes due to disturbances, a device for measuring this volume of air is required. In addition, since the characteristics of the gaps in an air-conditioned chamber are almost constant, the airtightness can be evaluated based on a single pressure difference when a constant volume of air is flowing in. According to the method described in [2] above, by using a constant volume air blower, the airtightness of the air-conditioned chamber can be evaluated based on a single pressure difference, which makes it easier to test the airtightness of the air-conditioned chamber.

[0036] [3] In some embodiments, in the configuration described in [2] above, The constant air volume type blower includes a main body (4) that blows out air (A), and a duct (6) that connects the main body and the ventilation hole and through which the air flows, The constant air volume type blower is configured to be able to blow air at a preset air volume into the air-conditioning chamber regardless of differences in ventilation resistance resulting from specifications of the duct, the ventilation hole, and the gap.

[0037] According to the method described in [3] above, regardless of differences in ventilation resistance due to the specifications of the ducts, ventilation holes, and gaps, it is possible to evaluate airtightness based on one differential pressure when a constant volume of air is blown into the air-conditioned chamber and a constant volume of air flows into the air-conditioned chamber.

[0038] [4] In some embodiments, in the configuration described in [2] or [3] above, The constant air volume type blower is configured so that a preset air volume to be blown into the air conditioning chamber is constant within a static pressure range of 0 Pa or more and 160 Pa or less.

[0039] According to the method described in [4] above, the airtightness of the air-conditioning chamber can be evaluated with high accuracy.

[0040] [5] In some embodiments, in the configuration according to any one of [2] to [4] above, The constant air volume type blower is configured to be capable of blowing air to the air conditioning chamber at a first air volume (V1) and a second air volume (V2) smaller than the first air volume.

[0041] The air-conditioning chamber may be configured such that it is not possible to blow air at the first air volume, or the measurement of the differential pressure may be insufficient at the second air volume. According to the method described in [5] above, the airtightness of the air-conditioning chamber is evaluated based on either the differential pressure when air is blown into the air-conditioning chamber at the first air volume or the differential pressure when air is blown into the air-conditioning chamber at the second air volume. This allows the number of air-conditioning chambers whose airtightness can be evaluated to be increased. In addition, if it is possible to blow air at both the first and second air volumes and measure the differential pressure, the airtightness of the air-conditioning chamber can be evaluated with higher accuracy by performing both tests. [Explanation of symbols]

[0042] 2 Suction / blowing device 2A Constant air volume blower 3 ventilation holes 4 Main body 5. Differential pressure gauge 6 Duct 8. Tape 50 Air Conditioning Chamber 100 Air-conditioned space 102 Building 103 Interior Space 104 Upper Wall 106 Lower Wall 108 Side wall 110 beds 112 Through hole 113 Gap A. Air S1 Placement Step S2 Connection Steps S3 Occlusion step S4 Drive Step S5 Acquisition Steps V1 First air volume V2 Second air volume

Claims

1. An airtightness test method for an air-conditioning chamber, which tests the airtightness of an air-conditioning chamber having an unnecessary gap formed under a floor of a space to be air-conditioned, comprising: a connecting step of airtightly connecting a suction / blower device to a ventilation hole which is one of the plurality of through holes formed in the floor; a closing step of closing the plurality of through holes excluding the ventilation holes; a driving step of driving the suction / blower device after the connecting step and the closing step; and acquiring a differential pressure between the air pressure in the air-conditioning chamber and the air pressure in the space to be air-conditioned while the suction / blowing device is operating. Test method for air tightness of air conditioning chamber.

2. The suction / blower device is a constant air volume type blower device configured to be able to blow air at a preset air volume into the air conditioning chamber, The constant air volume type blower may further include a placement step of placing the constant air volume type blower in the space to be air conditioned prior to the connection step.

2. The method for testing the air tightness of an air conditioning chamber according to claim 1.

3. The constant air volume type blower device includes a main body that blows out air, and a duct that connects the main body and the ventilation hole and through which the air flows, The constant air volume type blower is configured to be able to blow air at a preset air volume into the air-conditioning chamber regardless of differences in ventilation resistance due to specifications of the duct, the ventilation hole, and the gap.

3. The method for testing the air tightness of an air conditioning chamber according to claim 2.

4. The constant air volume type blower is configured so that a preset air volume to be blown into the air conditioning chamber is constant within a static pressure range of 0 Pa or more and 160 Pa or less.

4. The method for testing air tightness of an air conditioning chamber according to claim 2 or 3.

5. The constant air volume type blower is configured to be capable of blowing air into the air conditioning chamber at a first air volume and a second air volume smaller than the first air volume.

4. The method for testing air tightness of an air conditioning chamber according to claim 2 or 3.

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