Air supply box with measurement port

Abstract

To easily perform a proper performance test of an air conditioner by exactly measuring a state amount of a temperature or the like of air-conditioned air discharged from an air conditioner at a low cost without impairing design performance.SOLUTION: In a floor blowout type air-conditioning system including an air conditioner at in an attic space of a building, a ceiling inspection port formed at a ceiling of the air conditioner at a lower side, and a duct for supplying air conditioned by the air conditioner to an underfloor space of the building, an air supply box with a measurement port related to one embodiment, being an air supply box with a measurement port for connecting the air conditioner and the duct comprises a box main body part for defining a chamber for making an outlet part of the air conditioner and an inlet part of the duct communicate with each other therein, and formed with the measurement port communicating with the chamber, and a heat insulation layer formed at least at a part of the box main body part. The measurement port is formed at a position into which a measuring rope can be inserted through the ceiling inspection port.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an air supply box with a measurement port. [Background technology]

[0002] For example, in performance tests of ceiling-duct air conditioning systems equipped with ceiling-mounted air conditioners used in homes, office buildings, etc., the temperature of the conditioned air discharged from the air conditioner is typically measured at an outlet installed in the ceiling or wall of the room to be air-conditioned. In buildings with raised floors, even in underfloor air conditioning systems that use the raised floor space as a route for supplying or ventilating air from the air conditioner, the supply air temperature is measured at an underfloor outlet installed in the floor.

[0003] Patent Document 1 discloses a filter device that removes dust and other particles from the air blown into a workroom or the like. This filter device has an airflow passage formed inside a box-shaped frame, a filter arranged to block this airflow passage, and pipe-shaped measurement ports arranged on the side of the frame on the upstream and downstream sides of the filter. Various measuring instruments such as pressure sensors are inserted into the frame through the measurement ports to measure the filter characteristics (pressure loss, amount of dust, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 59-171725 Summary of the Invention [Problem to be solved by the invention]

[0005] During operational testing of underfloor air conditioning systems, the conventional method of measuring the temperature of the conditioned air (supply air) at a floor outlet installed in the floor presents a challenge: the temperature of the supply air from the air conditioner changes as it passes through the double-floor space formed below the floor, making accurate temperature measurements impossible. Furthermore, in the case of underfloor air conditioning systems that provide air conditioning for the entire building, a mixture of supply air discharged from both the ventilation system and the air conditioner may be sent to the double-floor space. In this case, the floor outlet cannot accurately measure the temperature of the supply air discharged from the air conditioner. One possible solution is to install a commercially available measurement port in the supply air duct, but this requires on-site installation and the installation of a dedicated inspection hatch on the ceiling or wall near the measurement port. This construction process is labor-intensive and time-consuming, and further detracts from the design. Furthermore, on-site installation poses limitations on the shape of the measurement port.

[0006] The measurement port in the filter device disclosed in Patent Document 1 requires the installation of a protruding pipe-shaped measurement port, and the protruding portion must be strong enough to prevent damage during installation, resulting in high costs. Furthermore, if the device is not in constant use, measures to prevent air leakage are required. Furthermore, as mentioned above, if the measurement port is installed inside the ceiling or wall, a dedicated inspection hatch must be installed on the ceiling or wall near the measurement port. Therefore, these installations require a lot of labor and time, and may also impair the design.

[0007] The present disclosure has been made in consideration of the above-mentioned problems, and aims to facilitate appropriate performance testing of air conditioners by enabling state quantities such as the temperature of conditioned air discharged from the air conditioner to be measured accurately at low cost and without compromising design. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, one aspect of the air supply box with measurement port of the present disclosure is an underfloor air conditioning system including an air conditioner placed in the attic space of a building, a ceiling inspection hatch formed on the ceiling surface below the air conditioner, and a duct for supplying air conditioned by the air conditioner to the underfloor space of the building, and is an air supply box with measurement port for connecting the air conditioner and the duct, which defines a chamber therein that connects the outlet of the air conditioner and the inlet of the duct, and is equipped with a box main body portion having a measurement port formed therein that connects to the chamber, and an insulating layer formed on at least a part of the box main body portion, and the measurement port is formed in a position where a measurement probe can be inserted through the ceiling inspection hatch. [Effects of the Invention]

[0009] The air supply box with a measurement port (hereinafter simply referred to as the "air supply box") according to the present disclosure can accurately measure state quantities such as the temperature and humidity of the supply air discharged from an air conditioner at low cost using a measurement probe inserted into the measurement port, and because the measurement port is simply formed in the box body, there is no risk of compromising the design. Therefore, appropriate performance tests of the air conditioner can be conducted, such as during a trial run after installation. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic configuration diagram of an underfloor air-conditioning system according to one embodiment. [Figure 2] FIG. 2 is a side view showing an air supply box arranged in the ceiling space of the above-mentioned underfloor air-conditioning system. [Figure 3] FIG. 1 is a perspective view of an air supply box according to one embodiment. [Figure 4] FIG. 2 is a perspective view of the air supply box seen from a different direction. [Figure 5] FIG. 2 is a cross-sectional view of a box main body according to one embodiment. [Figure 6] FIG. 1 is a perspective view of an air supply box according to one embodiment. [Figure 7]A side view showing an air supply box according to one embodiment arranged in the attic space. [Figure 8] FIG. 10 is a perspective view of an air supply box according to yet another embodiment. [Figure 9] FIG. 9 is an enlarged front view of a part of FIG. 8. [Figure 10] FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. [Figure 11] 1A is a front view showing an example of a locking hole formed in one flange portion of the box body, and FIG. 1B is a front view showing an example of a locking groove formed in the other flange portion. [Figure 12] 10A is a front view showing another example of a locking groove formed in one flange portion of the box body, and FIG. 10B is a front view showing another example of a locking hole formed in the other flange portion. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in these embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprises," "includes," "has," "includes," or "has" one element are not exclusive expressions that exclude the presence of other elements.

[0012] Fig. 1 is a schematic diagram of an air supply box 10 (10A) according to one embodiment applied to an underfloor air-conditioning system 50, and Fig. 2 is a side view showing the vicinity of the air supply box 10 (10A). Fig. 6 is a perspective view of an air supply box 10 (10B) according to a modified example of the air supply box 10 (10A), Fig. 7 is a side view showing the vicinity of an air supply box 10 (10C) according to another embodiment, and Fig. 8 is a perspective view of the air supply box 10 (10C).

[0013] 1 and 2, a building 60 has a ceiling portion 62, and an attic space S1 is formed above the ceiling surface 4. An air conditioner 1 is disposed in the attic space S1, and a ceiling inspection hatch 5 is provided on the ceiling surface 4 below the air conditioner 1 to enable inspection and removal of the air conditioner 1. The floor of the building 60 is configured as a double floor portion 64, and an underfloor space S2 is formed below a floor surface 64a facing the air-conditioned space R. Furthermore, a duct 2 is provided to supply air (supply air) SA conditioned by the air conditioner 1 to the underfloor space S2 of the building 60. An air supply box 10 (10A) is provided between the air conditioner 1 and the duct 2, and the air conditioner 1 and the duct 2 are connected via the air supply box 10 (10A). A floor outlet 66 is provided on the floor surface 64a, and the supply air SA supplied from the duct 2 to the underfloor space S2 is supplied from the floor outlet 66 to multiple air-conditioned spaces R.

[0014] The air supply box 10 (10A-10C) includes a box body 11, is adjacent to the casing 1a of the air conditioner 1, and is disposed between the outlet 1b of the air conditioner 1 and the inlet 2c of the duct 2. The box defines a chamber C therein, which communicates between the outlet 1b and the inlet 2c. A measurement port 12 is formed in the wall of the box body 10 and communicates with the chamber C. The measurement port 12 must be positioned to communicate with the chamber C and allow insertion of a measuring probe or other instrument through the ceiling inspection hatch 5. In the illustrated embodiment, the measurement port 12 is provided on the side of the box body 11. However, the measurement port 12 may also be provided on the underside of the box body 11 or on the opening edge 22. In addition to being used for inserting a measuring probe, the measurement port may also be used as a water inlet for test operation of the air conditioner's cooling drain pump. The measurement port 12 may also be provided in multiple locations. In addition, an insulating layer 14 is formed on at least a portion of the wall surface of the box main body 11, and the measurement port 12 is formed at a position where an operator can insert a measurement probe through a ceiling inspection hatch 5 provided on the ceiling surface 4.

[0015] Fig. 3 is a perspective view of the air supply box 10 (10A) viewed from one direction. Fig. 4 is a perspective view of the air supply box 10 (10A) viewed from the opposite direction to Fig. 3. Fig. 5 is a cross-sectional view showing a part of the partition wall of the box main body 11 in the air supply box 10 (10A to 10C). 3 and 4, the air supply box 10 (10A) has a heat insulating layer 14 formed on at least a portion of the wall surface of the box main body 11. Although not shown, the air supply boxes 10 (10B, 10C) also have a similar configuration.

[0016] 1 and 2, the ceiling inspection hatch 5 is configured so that an operator can insert their arm, and the measurement opening 12 is positioned so that the operator can reach it by inserting their arm through the ceiling inspection hatch 5. In other words, the measurement opening 12 is positioned so that the operator can insert a measurement probe into the measurement opening 12.

[0017] After installing an underfloor air-conditioning system 50 in a building 60, an air-conditioning performance inspection of the air conditioner 1 is required. Conventionally, the measurement target for such inspections is the supply air SA blown out from the underfloor air outlet 66, and the state quantities of the supply air SA, such as temperature and humidity, are measured. In contrast, the underfloor air-conditioning system 50 includes an air supply box 10 (10A), allowing an operator to insert a measurement probe into a measurement port 12 provided in the box body 11 and use this measurement probe to measure the state quantities of the supply air SA discharged from the air conditioner 1. Therefore, since the supply air SA discharged from the air conditioner 1 can be measured immediately after it is discharged from the air conditioner 1, no air other than the supply air SA discharged from the air conditioner 1 is mixed in, and the state quantities of only the supply air SA before changes in temperature, humidity, etc., can be accurately measured.

[0018] As shown in FIG. 3 , an insulating layer 14 is formed on at least a portion of the wall surface of the box body 11. The insulating effect of the insulating layer 14 allows the temperature, humidity, and other state variables of the supply air SA in chamber C to be maintained relatively uniform, even if the flow of the supply air SA in chamber C varies depending on the position of the casing 1a and duct 2 of the air conditioner 1 connected to the box body 11. Therefore, state variables such as the temperature and humidity of the supply air SA can be accurately measured without being affected by the installation location of the measurement port 12. Furthermore, because the measurement port 12 is installed in the air supply box 10 before on-site construction, on-site construction is not required, and therefore there are no problems with restrictions on the shape of the measurement port 12. Furthermore, because the measurement port 12 is located near the air conditioner 1 and within reach of the worker from the ceiling inspection hatch 5, the measurement can be performed using the ceiling inspection hatch 5. Therefore, there is no need to install a dedicated inspection hatch for the measurement port on-site.

[0019] 1, the duct 2 is composed of a horizontal duct 2a, one end of which is connected to a connector 24 and which extends substantially horizontally in the attic space S1, and a vertical duct 2b, which bends downward at a right angle from the horizontal duct 2a, extends vertically downward, and has the other end connected to a floor surface 64a and opens into the underfloor space S2. The supply air SA supplied from the vertical duct 2b to the underfloor space S2 can be supplied to air-conditioned spaces R, such as living rooms R (R2, R3) and a corridor R (R1), via a floor outlet 66. In addition, an air passage 68 (for example, an undercut in a door or a louver) is provided to connect multiple air-conditioned spaces R and return the supply air SA to the air conditioner 1.

[0020] A return air duct 3 is provided below the air conditioner 1, opening into a corridor R (R1) or the like contained within the air-conditioned space R. The air conditioner 1 draws air from the corridor R (R1) or the like through the return air duct 3 and supplies the temperature- and humidity-controlled conditioned air (supply air SA) to a chamber C in the air supply box 10. The supply air SA supplied to the chamber C is then supplied to the air-conditioned space R through a duct 2, an underfloor space S2, and a floor outlet 66. When inspecting the air conditioning performance of the air conditioner 1, for example, inserting a measurement probe, such as a temperature sensor or humidity sensor, into the measurement port 12 of the air supply box 10 allows accurate measurement of the state quantity of the supply air SA immediately after it is discharged from the air conditioner 1. The ceiling inspection hatch 5 has a main inspection hatch 6, which is covered by a main inspection hatch cover 7 during normal operation. A flange portion 3a forming the opening of the return air duct 3 is attached to the main inspection hatch cover 7.

[0021] A filter (not shown), for example, is provided at the opening of the return air duct 3, and air from the conditioned space R is drawn into the air conditioner 1 through this filter, which removes impurities such as dust. The air drawn into the air conditioner 1 has its temperature, humidity, and other state quantities adjusted by the air conditioner 1, and is then discharged as supply air SA into the box main body 11. The casing 1a of the air conditioner 1 and the air supply box 10 (10A) are fixed to predetermined positions in the attic space S1 by support members (not shown).

[0022] In one embodiment, as shown in Fig. 3, the measurement port 12 is configured as a through-hole formed in the outer wall surface of the box main body 11. Also, as shown in Fig. 5, the heat insulating layer 14 contains a plurality of closed cells 14a, and the presence of the closed cells 14a gives it elasticity. The heat insulating layer 14 is formed on the outer or inner peripheral surface of the box main body 11 so as to cover at least the measurement port 12. As shown in Fig. 2, a slit 16 is formed in the heat insulating layer 14 at a location covering the measurement port 12, and a measurement probe can be inserted into the measurement port 12 through this slit 16. In the illustrated embodiment, the heat insulating layer 14 is formed on the outer peripheral surface of the box body 11, as shown in FIGS.

[0023] Here, "the insulating layer 14 is of a closed-cell type and has elasticity" means that when the measurement probe inserted into the measurement port 12 is removed from the measurement port 12, the insulating layer 14 covers the measurement port 12 and blocks the measurement port 12, thereby preventing the passage of supply air SA from the measurement port 12 and preventing the penetration of moisture contained in the supply air SA.

[0024] According to the above embodiment, the measurement port 12 is configured as a through hole, which reduces the number of parts and eliminates the risk of breakage due to the absence of protrusions. Furthermore, when a measurement probe is not inserted into the measurement port 12, the insulating layer 14 closes the measurement port 12, preventing gas from leaking from the inside and outside of the box main body 11 through the measurement port 12. Furthermore, the insulating layer 14 is elastic and has a slit 16 formed in the insulating layer 14 at a location covering the measurement port 12, allowing the measurement probe to be easily inserted into the measurement port 12 through the slit 16. Furthermore, the insulating layer 14 has multiple closed cells 14a, which reduces moisture permeability and air permeability. This prevents the passage of supply air SA and the penetration of moisture.

[0025] In one embodiment, as shown in FIG. 3, the air supply box 10 (10A) has an opening edge 22 on one side of the box body 11 that forms an opening 20 that can receive the supply air SA conditioned by the air conditioner 1. The opening edge 22 is provided with an airtight band 23 along the entire edge. Also, as shown in FIG. 4, the box body 11 has a connection part 24 that protrudes from another side of the box body 11 that faces the opening edge 22. The box body 11 is connected to the duct 2 via the connection part 24. The measurement port 12 is formed on a side surface of the box body 11 other than the side on which the opening 20 and connection part 24 are provided.

[0026] According to this embodiment, the air supply box 10 has the opening edge 22 and the connection portion 24 provided on opposing surfaces of the box body 11. Therefore, the air supply box 10 can be easily positioned between the air conditioner 1 and the duct 2 with the opening edge 22 forming the opening 20 facing the air conditioner 1 and the connection portion 24 facing the duct 2. Therefore, the air supply box 10 can be easily connected to the air conditioner 1 and the duct 2 between the air conditioner 1 and the duct 2. Furthermore, when the air supply box 10 is positioned in this positional relationship, the measurement port 12 located on the side of the box body 11 is exposed to the outside from the box body 11, without being hidden by the air conditioner 1 or the duct 2. Therefore, when the main inspection hatch cover 7 is removed from the ceiling inspection hatch 5, the measurement port 12 can be easily reached by an operator inserting his or her hand through the main inspection hatch 6, allowing the operator to easily insert a measurement probe into the measurement port 12. This facilitates measurement of the supply air temperature and other parameters for performance testing of the air conditioner 1. Furthermore, if the measurement probe is permanently installed, inspection of the measurement port 12 and the measurement probe inserted into the measurement port 12 becomes easy.

[0027] In the embodiment shown in Figures 3 and 4, the box main body 11 has a rectangular parallelepiped shape with short sides along the direction from the air conditioner 1 toward the duct 2 and long sides along a direction perpendicular to the short sides (a direction perpendicular to the plane of Figure 2, i.e., the left-right direction on the plane of Figure 3), so it does not take up much space when placed between the air conditioner 1 and the duct 2.

[0028] Furthermore, since an airtight band 23 is provided on the entire edge of the surface of opening edge 22 arranged opposite outlet portion 1b of air conditioner 1, the connection between outlet portion 1b and opening edge 22 can be made airtight by fastening outlet portion 1b and opening edge 22 with screws or the like. This prevents leakage of supply air SA of air conditioner 1 from chamber C. Airtight band 23 is made of a material that can come into contact with the surface that constitutes outlet portion 1b and make the contact surface airtight.

[0029] In one embodiment, the airtight band 23 forms a surface that protrudes toward the outlet 1b beyond the other surfaces of the opening edge 22. In this embodiment, after the air supply box 10 (10A) is connected to the outlet 1b, the protruding surface of the airtight band 23 is brought into close contact with the opposing surface of the outlet 1b, thereby achieving airtightness. For example, an airtight rubber tape may be attached to the surface of the opening edge 22 that faces the outlet 1b.

[0030] 3 and 4, the box body 11 has a substantially rectangular parallelepiped shape. Specifically, it has a front surface 30 in which the opening 20 is formed, a back surface 32 in which the connection portion 24 is provided, a top surface 34, a bottom surface 36, and both side surfaces 38 and 40, with the measurement port 12 formed in the side surface 38. All of these surfaces are closed surfaces with no openings except for the measurement port 12. This allows the insulating effect of the insulating layers 14 formed on these surfaces to improve the insulating effect of the chamber C of the box body 11. In particular, by forming the insulating layer 14 also on the opening edge 22, the insulating properties and moisture resistance can be improved.

[0031] The connecting portion 24 is composed of a connecting pipe 24 (24a) protruding from the back surface 32. The connecting pipe 24 (24a) has a diameter that allows it to fit into the inlet portion 2c of the duct 2, and is connected to the inlet portion 2c while being fitted into the inlet portion 2c. The embodiment shown in FIG. 4 is composed of one connecting pipe 24 (24a), but it may be composed of multiple connecting pipes, and the position of the connecting pipe 24 (24a) need not be in the center of the back surface 32 as shown in FIG. 4, but may be off-center.

[0032] It is also preferable that the front surface 30 where the opening 20 is formed and the back surface 32 to which the inlet portion 2c of the duct 2 is connected are parallel to each other. This makes it easy to interpose the air supply box 10 (10A) between the outlet portion 1b of the casing 1a and the inlet portion 2c of the duct 2.

[0033] Next, an embodiment of a method for joining the connecting portion 24 and the inlet portion 2c of the duct 2 will be described. In this embodiment, the connecting pipe 24 (24a) has a rib 44 at its axially intermediate portion that protrudes outward from the outer circumferential surface 42 and extends circumferentially to form a ring. The connecting pipe 24 (24a) is inserted into the duct 2 and is fastened with a fastening band (not shown) that surrounds the duct 2 from the outside at a position distal to the rib 44, thereby firmly and airtightly connecting to the inlet portion 2c. This tightly contacts the inner surface of the inlet portion 2c with the outer circumferential surface of the connecting pipe 24 (24a), preventing leakage of the supply air SA and penetration of moisture. Furthermore, the tip of the inlet portion 2c is tightened from the outside by a fastening band that surrounds the base portion of the connecting pipe 24 (24a), which has a smaller diameter than the rib 44, thereby connecting the connecting pipe 24 (24a) and the inlet portion 2c, thereby preventing the fastening band from going beyond the rib 44 and coming off, and therefore preventing the inlet portion 2c from coming off the connecting pipe 24 (24a).

[0034] Furthermore, because the air supply box 10 (10A) and the duct 2 are connected using a fastening band, the fastening between the two can be easily released by removing the fastening band. Once the air supply box 10 (10A) is disconnected from the duct 2, workers can easily inspect the inside of the box main body 11. Note that instead of using a fastening band as a means of fastening the duct 2 to the connecting pipe 24 (24a), a fastening method that combines screws and tape, for example, may be used.

[0035] 6, the box main body 11 is formed in a rectangular parallelepiped, and flanges 70a and 70b that protrude outward from the opening 20 are formed on the opening edges 22 located on both the left and right sides of the opening 20, among the opening edges 22 that form the opening 20 facing the air conditioner 1. Round holes 72 are formed in the flanges 70a and 70b, and screws serving as locking pieces 74 are inserted into the round holes 72, and the screws are screwed into female threads formed in the casing 1a of the air conditioner 1. In another embodiment, flanges are also provided on the casing 1a of the air conditioner 1 at positions facing the flanges 70a and 70b, and the flanges 70a and 70b and the flange on the casing 1a side are fastened together with bolts and nuts. According to these embodiments, the air supply box 10 (10B) can be attached to the casing 1a in a simple manner.

[0036] 6, the height H1 of the box main body 11 and the diameter D of the connecting pipe 24 (24a) are configured to be approximately the same. In this way, by increasing the diameter D of the connecting pipe 24 (24a), the diameter of the duct 2 that fits into the connecting pipe 24 (24a) can be increased, thereby increasing the flow rate of the supply air SA that flows from the box main body 11 to the duct 2.

[0037] 6, the height dimensions of the flanges 70a and 70b are configured to be substantially the same as H1 of the box main body 11. This allows for greater freedom in positioning the round holes 72 and locking pieces 74 formed for fastening. 6, a flange 70c is provided between the lower ends of the flanges 70a and 70b, and a flange 70d is provided between the upper ends of the flanges 70a and 70b, thereby enabling the attachment of an airtight belt 23 and increasing the strength of the box body 11.

[0038] In one embodiment, as shown in Figures 7 and 8, the height dimension H1 of the box main body 11 is configured to be larger than the height dimension H2 of the air conditioner 1. This allows a duct 2 with a larger diameter than the height dimension H2 of the air conditioner 1 to be connected to the box main body 11. Furthermore, the duct 2 can be placed at a position higher than the height of the air conditioner 1. In this way, it becomes possible to use a duct 2 with a large diameter.

[0039] 7 and 8, in one embodiment, the lower end of the connection portion 24 (e.g., connection pipe 24 (24a)) is located above the lower end of the box main body 11. When the diameter of the connection portion 24 is D, the height difference ΔH between the lower end of the connection portion 24 and the lower end of the box main body 11 is configured to satisfy D / 10≦ΔH. According to this embodiment, the distance between the duct 2 connected to the connection portion 24 and the ceiling surface 4 can be made wider than the distance between the box main body 11 and the ceiling surface 4, thereby preventing interference between the duct 2 and the base material covering the upper surface of the ceiling or equipment installed on the upper surface of the ceiling.

[0040] In the embodiment shown in FIG. 8, the box main body 11 is formed as a rectangular parallelepiped, and flanges 70a and 70b protruding outward from the opening 20 are formed on the opening edges 22 located on both the left and right sides of the opening 20, among the opening edges 22 that form the opening 20 facing the air conditioner 1. Furthermore, flanges 70c and 70d are bridged between the flanges 70a and 70b. Rubber tape (not shown) is attached to the surfaces of the flanges 70a, 70b, and 70c, 70d that face the casing 1a. The provision of this rubber tape enhances the airtightness between the flanges 70a to 70d and the casing 1a. Ribs 76 are provided on the flanges 70d to ensure the out-of-plane strength of the flanges 70d, so that the rubber tape of the flanges 70d adheres tightly to the opening edges 22, effectively preventing air leakage from this area.

[0041] In the illustrated embodiment, the rib 76 is configured as a rectangular plate that is perpendicular to the opening 20 and protrudes toward the connecting portion 24. The rib 76 is provided over the entire length of the flange portion 70d.

[0042] In one embodiment, as shown in FIGS. 3 and 4 , the insulating layer 14 is formed to cover the entire outer periphery of the box body 11. This improves the insulating effect of the chamber C formed inside the box body 11, thereby suppressing temperature changes in the supply air SA discharged from the air conditioner 1 into the chamber C. Even if the flow of the supply air SA in the chamber C varies depending on the position of the air conditioner 1 and the duct 2 connected to the air supply box 10 (10A), the supply air temperature in the chamber C can be maintained uniform. Therefore, when measuring the temperature of the supply air SA discharged from the air conditioner 1 using a temperature measurement probe inserted into the measurement port 12, errors due to temperature changes after discharge can be minimized. Furthermore, because the insulating layer 14 is present on the entire outer periphery of the box body 11, the degree of freedom in the arrangement of the measurement port 12 relative to the box body 11 can be increased.

[0043] In one embodiment, as shown in Fig. 5, a metal layer 18 is provided inside the insulating layer 14. The metal layer 18 is made of a metal plate such as a steel plate, and the outer surface of this metal plate is covered with the insulating layer 14. Because the metal layer 18 is formed inside the insulating layer 14 in this way, dust accumulation and mold growth inside the box body 11 can be suppressed more effectively than when the insulating layer 14 is inside the metal layer 18, and cleaning is easier.

[0044] In one embodiment, the insulating layer 14 is made of, for example, rubber foam or expanded polyethylene foam. These materials contain substantially only closed cells 14a, and therefore have low moisture permeability and air permeability. Therefore, they can prevent the passage of supply air SA and the permeation of moisture. Furthermore, because these materials have closed cells 14a, they have elasticity. Therefore, they can increase the degree of closure of the measurement port 12 when a measurement probe inserted into the measurement port 12 is removed from the measurement port 12.

[0045] 1, the notch 16 is formed in a cross shape. This allows the measurement probe to be easily inserted into the measurement port 12 without being obstructed by the insulating layer 14. Furthermore, the degree of occlusion of the measurement port 12 can be ensured to a certain extent after the measurement probe is removed from the measurement port 12.

[0046] In another embodiment, the notch 16 is formed, for example, in a straight line shape (a line having a certain length). This shape can improve the degree of occlusion of the measurement port 12 by the heat insulating layer 14 after the measurement probe is removed from the measurement port 12.

[0047] In one embodiment, the measurement port 12 is configured as a through-hole that penetrates the wall of the box body 11, and has, for example, a circular cross section. However, the shape is not limited to a circle, and any shape that matches the cross section of the measurement probe may be used. In another embodiment, air leakage can be reduced by attaching an inexpensive sticker (e.g., a circular sticker) after removing the measurement probe from the measurement port 12. In yet another embodiment, the notch 16 can be marked by painting it a conspicuous color (e.g., white).

[0048] In one embodiment, as shown in FIG. 2 , the ceiling inspection hatch 5 has a main inspection hatch 6 and a sub-inspection hatch 8. The main inspection hatch 6 has plan dimensions large enough to allow replacement of the air conditioner 1. Opening the main inspection hatch 6 allows inspection and replacement of the air conditioner 1. The main inspection hatch 6 is covered by a main inspection hatch cover 7 except during inspections such as operational tests. The main inspection hatch cover 7 is provided so that the main inspection hatch 6 can be opened and closed relative to the main inspection hatch 6. A sub-inspection hatch 8 is provided in a partial area of ​​the main inspection hatch cover 7. The sub-inspection hatch 8 can open an area smaller than the main inspection hatch 6, and is formed in a position where a measurement probe can be inserted through the sub-inspection hatch 8.

[0049] According to this embodiment, when inspecting the air supply box 10 or measuring the state quantities of the supply air SA discharged from the air conditioner 1, the measurement port 12 is within reach of the worker from the sub-inspection hatch 8. The worker can insert a measurement probe into the measurement port 12 through the small sub-inspection hatch 8. This allows for measurement of state quantities such as the temperature and humidity of the supply air SA in the chamber C, inspection of the measurement probe when permanently installed, and inspection of the measurement port 12 itself. Therefore, these tasks do not require the need to open and close the large main inspection hatch cover 7 to open the main inspection hatch 6, simplifying the work. Therefore, when inserting a measurement probe through the sub-inspection hatch 8 for measurement, a single worker can easily perform measurements, air conditioner testing, and the like. Therefore, there is no need to provide an inspection hatch dedicated to the measurement port 12 and the measurement probe inserted into the measurement port 12 during on-site construction.

[0050] In the exemplary embodiment shown in Figure 2, a sub-inspection hatch cover 9 is provided to shield the sub-inspection hatch 8. During normal operation, the sub-inspection hatch 8 is closed with the sub-inspection hatch cover 9, and during operation tests or inspections, the sub-inspection hatch cover 9 is operated to open the sub-inspection hatch 8. The main inspection hatch 6, main inspection hatch cover 7, sub-inspection hatch 8, and sub-inspection hatch cover 9 are, for example, rectangular, and one side of the rectangle of the main inspection hatch cover 7 and sub-inspection hatch cover 9 is rotatably connected to the ceiling surface 4 or the opposing side of the main inspection hatch cover 7 by a hinge portion (not shown) or the like, thereby allowing them to be opened and closed.

[0051] Fig. 9 is an enlarged front view of the flange portion 70a, which is a part of Fig. 8, and Fig. 10 is a cross-sectional view taken along line AA in Fig. 9. Also, Figs. 11 and 12 are front views showing the locking holes 78 or locking grooves 84 according to some embodiments formed in the flange portions 70a and 70b, respectively.

[0052] 8, the box body 11 has an opening edge 22 that forms an opening 20 on one side of the box body 11 that can receive air (supply air) SA conditioned by the air conditioner 1. Flanges 70a and 70b are provided on the opening edges 22 located on both the left and right sides of the opening 20 so as to face the air conditioner 1. Locking holes 78 or locking grooves 84 are formed in the flanges 70a and 70b, and holes to which locking pieces 74 are fixed are provided at locations on the air conditioner 1 (for example, the casing 1a) that face the locking holes 78 or locking grooves 84.

[0053] As shown in Figures 9 to 12, the locking holes 78 or locking grooves 84 formed in the flange portions 70a and 70b have first portions 80, 86 into which the locking pieces 74 can be inserted, and second portions 82, 88 that communicate with the first portions 80, 86 and can lock the locking pieces 74. When constructing, updating, or performing maintenance and inspection of the air supply box 10 (10C), it is necessary to install the box main body 11, correct any misalignment, remove it, etc. When performing these tasks, the worker first inserts the locking piece 74 into the first portion 80 of the locking hole 78 or the first portion 86 of the locking groove 84, and while supporting the box main body 11 on the first portion 80 or 86, moves the locking piece 74 to the second portion 82 of the locking hole 78 or the second portion 88 of the locking groove 84, or removes the locking piece 74 from the locking hole 78 or the locking groove 84.This allows the worker to perform these tasks efficiently without bearing the weight of the air supply box 10 (10C) and without having to fine-tune the relative positions of the air supply box 10 and the air conditioner 1 in a narrow, dark place.

[0054] In the embodiment shown in FIGS. 8 to 10 , locking holes 78 are formed in the flange portions 70 a and 70 b. The locking holes 78 have first portions 80 into which the locking pieces 74 can be inserted and second portions 82 that communicate with the first portions 80 and into which the locking pieces 74 can be locked. The locking pieces 74 are located on the air conditioner 1 side, facing the first portions 80 of the locking holes 78. Therefore, for example, when a worker fixes the box main body 11 to the air conditioner 1, the locking pieces 74 are attached to the air conditioner 1 in advance and inserted into the first portions 80. Thereafter, when the worker moves the box main body 11 in the direction opposite to the direction of arrow a shown in FIGS. 8 to 10 , the locking pieces 74 move to the second portions 82, and the box main body 11 is fixed to the air conditioner 1 by, for example, tightening the locking pieces 74.

[0055] 8 to 10, the locking hole 78 has a first portion 80 and a second portion 82 formed vertically above the first portion 80. In this embodiment, when fixing the box main body 11 to the air conditioner 1, the worker inserts the locking piece 74 into the first portion 80 and then lowers the box main body 11 vertically downward. This causes the locking piece 74 to move relatively in the direction of arrow a and be locked into the second portion 82, and the box main body 11 is then fixed to the air conditioner 1 by tightening the locking piece 74, etc.

[0056] In the embodiment shown in FIGS. 11 and 12 , a locking hole 78 is formed in one of the flanges 70a and 70b, and a locking groove 84 is formed in the other of the flanges 70a and 70b. The locking groove 84 is formed to open to the outer edge of the flange 70a or 70b. In these embodiments, the second portion 82 or 88 of the locking hole 78 or locking groove 84 is positioned horizontally relative to the first portion 80 or 86 of the locking hole 78 or locking groove 84. When fixing the box main body 11 to the air conditioner 1, the worker first inserts the locking piece 74 into the first portion 80 of the locking hole 78 and then into the first portion 86 formed on the inlet side of the opening of the locking groove 84. In this state, the worker can perform the next task while having the weight of the box main body 11 bear on the air conditioner 1.

[0057] 11 and 12. As a result, the locking pieces 74 move in the direction of arrow a, and in the locking holes 78, they move to the second portions 82 and lock onto the flange portions 70a or 70b at the second portions 82, and in the locking grooves 84, they move to the second portions 88 at the back of the locking grooves 84 and lock onto the flange portions 70a or 70b that form the second portions 88. By tightening the locking pieces 74 or by other methods, the box main body 11 is fixed to the air conditioner 1.

[0058] 11 and 12, the first portion 86 of the locking groove 84 has an opening formed with an inclined surface that is inclined relative to the outer edge of the flange portion 70a or 70b, or has an R portion formed therein, and has a shape in which the groove spacing at the opening is enlarged. This makes it easier for the locking hole 78 to be inserted into the locking groove 84.

[0059] 8 to 10 , the locking piece 74 has a head 74a and a shaft 74b. The head 74a has an outer shape large enough to be inserted into the first portion 80 of the locking hole 78 and to be locked into the second portion 82, and the shaft 74b has an outer shape large enough to be inserted into the first portion 80 and the second portion 82. The outer shape of the head 74a is larger than the groove width formed in the first portion 86 and the second portion 88 of the locking groove 84, and the outer shape of the shaft 74b is smaller than the groove width formed in the first portion 86 and the second portion 88 of the locking groove 84.

[0060] In the illustrated embodiment, as shown in Figures 8 to 12, a screw is used as the locking piece 74. The head of the screw has a circular outer shape, and the screw portion (shank 74b) is screwed into the air conditioner 1, thereby fixing the screw to the air conditioner 1.

[0061] 9 to 12, in the illustrated embodiment, the first portion 80 of the locking hole 78 has a circular shape, and the second portion 82 is formed in an arc shape. The head portion 74a of the locking piece 74 is smaller than the diameter of the first portion 80 of the locking hole 78 and is larger than the width of the second portion 82. In addition, the head portion 74a has a dimension larger than the groove width of the locking groove 84, and the shaft portion 74b has a dimension smaller than the groove width of the locking groove 84.

[0062] In another embodiment, a bolt having a square head such as a hexagonal head and a threaded portion may be used instead of the screw.

[0063] 8 to 10, the locking piece 74 may be fixed to the casing 1a of the air conditioner 1. For example, the locking piece 74 has a male thread like a screw or bolt, and a female thread is formed on the opposing surface of the casing 1a, which is arranged so as to face the flange portion 70a or 70b, and the male thread is screwed into the female thread to fix the locking piece 74 to the casing 1a. Furthermore, in another embodiment, a flange may be formed on the casing 1a of the air conditioner 1 at a position facing the flange portions 70a and 70b, and the locking piece 74 may be fixed to the flange portion on the casing 1a side. In this case, for example, a bolt is used as the locking piece 74, and the male thread of the bolt is configured to be screwed into a nut on the flange portion side of the casing 1a side.

[0064] The contents described in each of the above embodiments can be understood, for example, as follows.

[0065] 1) In one embodiment, an air supply box with a measurement port is provided in an underfloor air-conditioning system (50) including an air conditioner (1) arranged in an attic space (S1) of a building (60), a ceiling inspection hatch (5) formed in a ceiling surface (4) below the air conditioner (1), and a duct (2) for supplying air (SA) conditioned by the air conditioner (1) to an underfloor space (S2) of the building (60), the air supply box with a measurement port is provided for connecting the air conditioner (1) and the duct (2). The box (10) includes a box body (11) defining a chamber (C) therein that communicates between the outlet (1b) of the air conditioner (1) and the inlet (2c) of the duct (2), and having a measurement port (12) that communicates with the chamber (C), and a heat insulating layer (14) formed on at least a part of the box body (11), and the measurement port (12) is formed at a position where a measurement probe can be inserted through the ceiling inspection hatch (5).

[0066] In the past, measurements such as temperature were taken at the floor outlet (66) during air conditioning performance inspections after installation of an air conditioner. However, with the above-described configuration, a measurement probe can be inserted into the measurement port (12) provided in the box main body (11) adjacent to the air conditioner (1), and the state quantities of the conditioned air (supply air) (SA) discharged from the air conditioner (1) can be measured using this measurement probe. Therefore, since the supply air (SA) discharged from the air conditioner (1) is measured immediately adjacent to the air conditioner (1), the state quantities of the supply air (SA) can be accurately measured. Furthermore, since the insulating layer (14) is formed in the box main body (11), a uniform temperature can be maintained within the chamber (C). Therefore, the temperature of the conditioned air (SA) discharged from the air conditioner (1) can be accurately measured. Furthermore, since the measurement port (12) is installed in the air supply box (10) before on-site construction, on-site construction is not required, and therefore problems such as shape restrictions do not arise. Furthermore, the measurement port (12) is located near the air conditioner (1) and within reach of the operator from the ceiling inspection hatch (5), which is an inspection hatch for the air conditioner, so the above measurements can be made using the ceiling inspection hatch (5). Therefore, there is no need to install an inspection hatch dedicated to the measurement port on-site.

[0067] 2) Another aspect of the air supply box with a measurement port is the air supply box with a measurement port described in 1), wherein the measurement port (12) includes a through hole formed in the outer wall surface of the box main body (11), and the insulating layer (14) is formed on the outer or inner surface of the box main body (11) so as to cover at least the measurement port (12), has a plurality of closed bubbles (14a), is elastic, and has a notch (16) formed in the location covering the measurement port (12).

[0068] With this configuration, the measurement port (12) includes a through-hole formed in the outer wall surface of the box body (11), thereby reducing the number of components and eliminating the risk of breakage due to the absence of protrusions. Furthermore, when a measurement probe is not inserted into the measurement port (12), the insulating layer (14) closes the measurement port (12), preventing gas leakage from inside and outside the box body through the measurement port (12). Furthermore, the insulating layer (14) is elastic and has a slit (16) formed in the insulating layer (14) at a location covering the measurement port (12), allowing the measurement probe to be easily inserted into the measurement port. Furthermore, the insulating layer (14) has multiple closed cells (14a), resulting in low moisture permeability and air permeability. This prevents the passage of supply air (SA) and the penetration of moisture.

[0069] 3) In yet another embodiment, the air supply box with a measurement port is the air supply box with a measurement port described in 2), in which the notch (16) is formed in a cross shape.

[0070] With this configuration, the notch (16) formed in the area covering the measurement port (12) has a cross shape, so that the measurement probe can be easily inserted into the measurement port (12), and the measurement port (12) can be sealed with the insulating layer (14) after the measurement probe is removed from the measurement port (12).

[0071] 4) In yet another aspect, the air supply box with a measurement port is an air supply box with a measurement port described in any of 1) to 3), wherein the box main body (11) includes an opening edge (22) on one side of the box main body that forms an opening (20) capable of receiving air (SA) conditioned by the air conditioner (1), and the opening edge (22) has an airtight band (23) on the entire edge of the side facing the air conditioner (1), and the box main body (11) further includes a connection part (24) that protrudes from the other side of the box main body (11) that faces the opening edge (22) and is connected to the duct (2), and the measurement port (12) is formed on the side surface (38) of the box main body (11).

[0072] According to this configuration, the air supply box (10) can be easily placed between the air conditioner (1) and the connection part (249) with the opening edge (22) facing the air conditioner (1) and the connection part (24) facing the duct (2). Furthermore, when the air supply box (10) is placed between the air conditioner (1) and the duct (2), the measurement port (12) arranged on the side surface (38) of the box main body (11) is located in a position that is reachable by an operator from the ceiling inspection hatch (5), making inspection work easy to perform from the ceiling inspection hatch (5). Furthermore, an airtight band (23) is provided around the entire edge of the surface of the opening edge (22) facing the duct (2), thereby preventing leakage of the supply air (SA) of the air conditioner (1) from the chamber (C) formed inside the box main body (11).

[0073] 5) In yet another aspect, the air supply box with a measurement port is the air supply box with a measurement port described in 4), in which the height dimension (H1) of the box main body (11) is greater than the height dimension (H2) of the air conditioner (1).

[0074] With this configuration, the height dimension (H1) of the box body (11) is greater than the height dimension (H2) of the air conditioner (1), so that a duct (2) having a diameter greater than the height dimension (H2) of the air conditioner (1) can be connected to the box body (11). In addition, the duct (2) can be placed at a position higher than the height of the air conditioner (1).

[0075] 6) In yet another embodiment, the air supply box with a measurement port is an air supply box with a measurement port described in 4) or 5), wherein the lower end of the connection portion (24) is located higher than the lower end of the box main body portion (11), and when the diameter of the connection portion (24) is D, the height difference ΔH between the lower end of the connection portion (24) and the lower end of the box main body portion (11) satisfies D / 10≦ΔH.

[0076] With this configuration, the distance between the duct (2) connected to the connection portion (24) and the ceiling surface (4) can be made wider than the distance between the box main body portion (10a) and the ceiling surface (4), thereby preventing interference between the duct (2) and the base material covering the upper surface of the ceiling or the equipment installed on the upper surface of the ceiling.

[0077] 7) In yet another aspect, the air supply box with a measurement port is an air supply box with a measurement port described in any one of 1) to 6), in which the insulating layer (14) is formed so as to cover the entire outer peripheral surface of the box main body portion (11).

[0078] According to this configuration, the insulating layer (14) is formed so as to cover the entire outer peripheral surface of the box body (11), and therefore the air supply box (10) is insulated over the entire outer peripheral surface of the box body (11). This suppresses temperature changes in the supply air (SA) discharged from the air conditioner (1) into the chamber (C) of the box body (11), thereby suppressing temperature variations within the chamber (C), and therefore allows the measurement probe inserted into the measurement port (12) to accurately measure state quantities such as the temperature and humidity of the supply air discharged from the air conditioner.

[0079] 8) In yet another aspect, the air intake box with a measurement port is an air intake box with a measurement port described in any one of 1) to 7), in which the insulating layer (14) is made of rubber foam or foamed polyethylene foam.

[0080] According to this configuration, the insulating layer (14) is a foamed material containing substantially only closed cells (14a), and therefore has low moisture permeability and air permeability, and is elastic due to the closed cells (14a) built in. Therefore, when the measurement probe is removed from the measurement port (12), the insulating layer (14) can close the measurement port (12).

[0081] 9) In yet another embodiment, the air supply box with a measurement port is an air supply box with a measurement port described in any of 1) to 8), wherein the ceiling inspection hatch (5) includes a main inspection hatch (6) having plan dimensions large enough to allow the air conditioner (1) to be replaced, and a sub-inspection hatch (8) formed in a partial area of ​​an inspection hatch cover (7) that can open and close the main inspection hatch, and the measurement port (12) is formed in a position where the measurement probe can be inserted through the sub-inspection hatch (8).

[0082] With this configuration, when inspecting the air supply box or measuring status quantities, the worker can insert his or her hand through the small sub-inspection hatch (8) to perform the inspection or measurement, eliminating the need to open and close the large inspection hatch cover (7) each time, simplifying the work.

[0083] 10) In yet another aspect, the air supply box with a measurement port is the air supply box with a measurement port described in any one of 1) to 9), wherein the box main body (11) includes an opening edge (22) that forms an opening (20) on one side of the box main body (11) that can receive air (SA) conditioned by the air conditioner (1), and the opening edges (22) located on both the left and right sides of the opening (20) are provided with a pair of openings (22) facing the air conditioner (1). The air conditioner (1) has flange portions (70a, 70b) provided thereon, and the flange portions (70a, 70b) are formed with locking holes (78) or locking grooves (84) into which locking pieces (74) provided on the air conditioner (1) can be inserted, and the locking holes (78) or locking grooves (84) include first portions (80, 86) into which the locking pieces (74) can be inserted and second portions (82, 88) that communicate with the first portions (80, 86) and can lock the locking pieces (74).

[0084] When constructing, updating, or performing maintenance and inspection of the air supply box (10), it is necessary to perform work such as installing the box main body (11), correcting misalignment, and removing the box main body (11). According to the above configuration, in these works, the locking piece (74) fixed to the air conditioner 1 in advance is inserted into the first portion (80, 86) of the locking hole (78) or the locking groove (84) to support the box main body (11) on the air conditioner (1), and the locking piece (74) is then moved to the second portion (82, 88) or the locking piece (74) is removed from the locking hole (78) or the locking groove (84), thereby enabling the worker to efficiently perform these works without having to bear the weight of the air supply box (10). [Explanation of symbols]

[0085] 1 Air conditioner 1a Casing 1b Exit section 2 ducts 2a Horizontal duct 2b Vertical duct 2c Entrance 3 Return air duct 3a Flange 4 Ceiling surface 5 Ceiling inspection hatch 6 Main inspection hatch 7 Main inspection hatch cover 8 Sub-inspection hatch 9 Sub-inspection hatch cover 10 (10A, 10B, 10C) Air supply box with measurement port 11 Box body 30 front 32 Back side 34 Top surface 36 Bottom side 38, 40 Side 12 Measurement port 14 Insulation layer 14a Closed Cell 16 Cutting 18 metal layer 20 aperture 22 Opening edge 23 Airtight Zone 24 Connection 24(24a) Connecting pipe 42 Outer surface 44, 76 Ribs 50 Underfloor air conditioning system 60 Buildings 62 Ceiling 64 Double floor 64a Floor 66 Floor outlet 68 Wind path 70a, 70b, 70c, 70d flange parts 72 Round hole 74 Locking piece (screw) 74a head 74b Shaft 78 Locking hole 80 Part 1 82 Part 2 84 Locking groove 86 Part 1 88 Part 2 C Chamber R Air-conditioned space R(R1) Corridor R(R2, R3) Room S1 Ceiling Space S2 underfloor space SA Air Supply

Claims

1. In an underfloor air-conditioning system including an air conditioner disposed in the ceiling space of a building, a ceiling inspection hatch formed on the ceiling surface below the air conditioner, and a duct for supplying air conditioned by the air conditioner to an underfloor space of the building, an air supply box with a measurement port for connecting the air conditioner and the duct, a box body defining a chamber therein that communicates with an outlet of the air conditioner and an inlet of the duct, and having a measurement port formed therein that communicates with the chamber; a heat insulating layer formed on at least a portion of the box body, The measurement opening is formed at a position where an operator can insert his / her arm through the ceiling inspection hatch to insert a measurement probe. Air supply box with measurement port.

2. the measurement port includes a through-hole formed in one surface of the box body, the heat insulating layer is formed on the outer peripheral surface or the inner peripheral surface of the box body so as to cover at least the measurement port, has a plurality of closed cells, is elastic, and has a notch formed in the portion covering the measurement port; The air supply box with a measurement port according to claim 1.

3. The incision is formed in a cross shape. The air supply box with a measurement port according to claim 2.

4. the box body includes an opening edge that forms an opening that can receive air conditioned by the air conditioner on one surface of the box body, and the opening edge has an airtight band provided on the entire edge of the surface facing the air conditioner, the box body further includes a connection portion that protrudes from another surface of the box body that faces the opening edge and is connected to the duct, The measurement port is formed on a side surface of the box main body. An air supply box with a measurement port according to any one of claims 1 to 3.

5. The height dimension of the box main body is greater than the height dimension of the air conditioner. The air supply box with a measurement port according to claim 4.

6. a lower end of the connection portion is located above a lower end of the box body portion, When the diameter of the connection portion is D, a height difference ΔH between the lower end of the connection portion and the lower end of the box main body portion satisfies D / 10≦ΔH.

6. The air supply box with a measurement port according to claim 4 or 5.

7. The heat insulating layer is formed so as to cover the entire outer peripheral surface of the box body. An air supply box with a measurement port according to any one of claims 1 to 6.

8. The heat insulating layer is made of rubber foam or polyethylene foam. An air supply box with a measurement port according to any one of claims 1 to 7.

9. The ceiling inspection hatch is: A main inspection hatch having a planar dimension large enough to allow replacement of the air conditioner; A sub-inspection hatch formed in a partial area of ​​a main inspection hatch cover that can open and close the main inspection hatch, The measurement port is formed at a position where the measurement probe can be inserted through the sub-inspection port. An air supply box with a measurement port according to any one of claims 1 to 8.

10. the box body includes an opening edge that forms an opening on one surface of the box body that can receive air conditioned by the air conditioner, flange portions are provided on the opening edges located on both the left and right sides of the opening so as to face the air conditioner; a locking hole or a locking groove into which a locking piece provided on the air conditioner can be inserted is formed in the flange portion; The locking hole or the locking groove includes a first portion into which the locking piece can be inserted and a second portion that communicates with the first portion and can lock the locking piece. An air supply box with a measurement port according to any one of claims 1 to 9.

Images