compartment

Abstract

A booth that forms a quiet area without blocking the flow of inside and outside air is provided. According to an embodiment, the booth has a box-shaped booth body, a communication portion that communicates the inside and outside of the booth body, and an area changing portion. The area changing portion changes the space area in a direction intersecting the flow direction of air passing through the communication portion multiple times along the flow direction. The area changing portion has, in order along the flow direction, a first area, a second area larger than the first area, a third area smaller than the second area, a fourth area larger than the third area, and a fifth area smaller than the fourth area as the space area. At least one of the second area and the fourth area of the area changing portion, and the distance between the area defining surface having the first area and the area defining surface having the third area and the distance between the area defining surface having the third area and the area defining surface having the fifth area are different from each other.

Description

Technical Field

[0001] Embodiments of the present invention relate to compartments. Background Technology

[0002] The cubicle is formed as a single room that creates a predetermined area by a box-shaped cubicle body containing wall panels. The cubicle is, for example, a single room in which workers work or students study. Summary of the Invention

[0003] The problem that the invention aims to solve

[0004] The problem to be solved by the present invention is to provide a partition that creates a quiet area without blocking the flow of air between the inside and outside.

[0005] Solution for solving the problem

[0006] According to the embodiment, the compartment has a box-shaped main body, a connecting portion, and an area-changing portion. The connecting portion is provided in the main body of the compartment, enabling communication between the inside and outside of the main body. The area-changing portion changes the spatial area multiple times along the airflow direction intersecting the flow direction. The area-changing portion sequentially includes a first area, a second area larger than the first area, a third area smaller than the second area, a fourth area larger than the third area, and a fifth area smaller than the fourth area as spatial areas along the flow direction. The second and fourth area areas of the area-changing portion are different from each other, and the distance between the area defined surface having the first area area and the area defined surface having the third area area, and the distance between the area defined surface having the third area area and the area defined surface having the fifth area area, are different from each other at least one of the following: At least one of the area-defined surface with a second area and the area-defined surface with a fourth area of ​​the area-changing part has at least one of a first reflective surface and a second reflective surface. The first reflective surface reflects sound traveling from the outside of the compartment body through the area-changing part to the inside of the compartment body back to the outside of the compartment body. The second reflective surface reflects sound traveling from the inside of the compartment body through the area-changing part to the outside of the compartment body back to the inside of the compartment body. Attached Figure Description

[0007] Figure 1 This is a schematic cross-sectional view of the compartment involved in the first embodiment.

[0008] Figure 2 This is a diagram showing a measuring device for measuring the sound absorption and sound insulation effects of the wall panels of the partition involved in the first embodiment.

[0009] Figure 3 Is using Figure 2 The measuring apparatus shown presents a table illustrating the difference in sound pressure levels between sound absorption and sound insulation with and without wall panels.

[0010] Figure 4 It is shown that... Figure 1 The symbol IV in the figure shows a schematic cross-sectional view of the connecting part and the area variation part of the compartment.

[0011] Figure 5 It is shown as Figure 4 A schematic cross-sectional view of a portion of the cylindrical body of the compartment showing the area variation.

[0012] Figure 6 It is a graph showing the relationship between the frequency of male and female voices and sound pressure levels.

[0013] Figure 7 It is shown Figure 5 The curve shown is the attenuation curve of the sound in a predetermined frequency range under condition 1.

[0014] Figure 8 It is shown Figure 5 The curve shown is the attenuation curve of the sound in a predetermined frequency range under condition 2.

[0015] Figure 9 It is shown Figure 5 The curve shown is the attenuation curve of the sound in a predetermined frequency range under condition 3.

[0016] Figure 10 It shows that Figures 7 to 9 The curves showing the attenuation of sound within a predetermined frequency range when the attenuation amounts of the sound are superimposed are shown.

[0017] Figure 11 This is a schematic cross-sectional view of the compartment involved in the comparative example.

[0018] Figure 12 It is shown as Figure 4 A schematic cross-sectional view of a modified example of a cylindrical body representing a portion of the area variation section of the shown compartment.

[0019] Figure 13 It is shown as Figure 4 A schematic cross-sectional view of another variation of the cylindrical body, representing a portion of the area variation section of the shown compartment.

[0020] Figure 14 It is shown as Figure 4 A schematic cross-sectional view of another variation of the cylindrical body, representing a portion of the area variation section of the shown compartment.

[0021] Figure 15 This is a schematic cross-sectional view showing the connecting portion and the area variation portion of the compartment involved in the first variation of the first embodiment.

[0022] Figure 16 It is shown Figure 15 The curve showing the attenuation of sound within a predetermined frequency range of the area variation section.

[0023] Figure 17 This is a schematic cross-sectional view showing the connecting portion and the area variation portion of the compartment involved in the second variation of the first embodiment.

[0024] Figure 18 This is a schematic cross-sectional view showing the connecting portion and the area variation portion of the compartment involved in the third variation of the first embodiment.

[0025] Figure 19 This is a schematic cross-sectional view of the compartment involved in the second embodiment.

[0026] Figure 20 This is a schematic cross-sectional view of the compartment involved in the third embodiment.

[0027] Figure 21 This is a schematic cross-sectional view of the compartment involved in the fourth embodiment.

[0028] Figure 22 This is a schematic cross-sectional view of the compartment involved in the fifth embodiment.

[0029] Figure 23 Is Figure 22 Enlarged view of the location indicated by the appendix label XXIII.

[0030] Symbol Explanation

[0031] 10. Partition; 12. Partition body; 121. Wall panel; 14. Connecting part; 16. Area variation part; 161-167. Area part; 1711-1713. Reflective surface; 1721-1723. Reflective surface; 18. Door; 20. Ceiling part; 30. Cylindrical body; 301-303. Attenuation part; 311, 312. Small area part; 32… Large area part. Detailed Implementation

[0032] The following describes several implementation methods with reference to the accompanying drawings.

[0033] The cubicle 10 described in this embodiment is applicable to various devices that can be used as individual rooms. The cubicle 10 described in this embodiment can be fixed or installed in various locations such as inside a building, in a station, or inside a train, and can be used as a work cubicle for workers, students, etc. Web conferencing can also be conducted in the cubicle 10. Furthermore, the cubicle 10 can be used as a individual room where users can rest and relax. Additionally, the cubicle 10 described in this embodiment can be used as a disaster preparedness device, such as a simple toilet cubicle or a simple changing room used in conjunction with a shower room.

[0034] [First Implementation Method]

[0035] use Figures 1 to 11 The compartment 10 involved in the first embodiment will be described.

[0036] Figure 1 A schematic cross-sectional view of the compartment 10 according to this embodiment is shown. Figure 1 As shown, the compartment 10 is formed as a box shape that is fixed or placed on the ground F. The compartment 10 has a height at which the upper end of the compartment 10 does not reach the ceiling of the room when it is installed or placed indoors.

[0037] The compartment 10 has: a box-shaped compartment body (frame) 12, which is fixed or placed on the ground F; a cylindrical connecting part 14, which is provided in the compartment body 12 to connect the inside and outside of the compartment body 12; and an area variation part 16, which is provided in the connecting part 14.

[0038] The compartment body 12 may be box-shaped, for example, in the form of a generally quadrangular prism. The compartment body 12 may also be in the form of a generally polygonal prism or a cylinder. It should be noted that it is preferable that the gap between the compartment body 12 and the ground F is small, such that the gap is non-existent.

[0039] If the main body 12 of the compartment is, for example, generally prismatic in shape, it is formed to have an interior space with a width, depth, and height greater than that of an adult user. When the compartment 10 is used as a workspace, the main body 12 is, for example, large enough to accommodate a table as a workspace and a chair for the user of the compartment 10, allowing the user to sit in the chair or stand up from a seated position. The main body 12 is also preferably large enough to be used by multiple users, not just one.

[0040] The main body of the compartment 12 preferably has a door 18 for users to enter and exit the compartment 10.

[0041] If the compartment 10 is lightweight enough, for example, to be made of corrugated cardboard that a user can easily lift, then the door 18 is not necessary. In this way, if the compartment 10 is lightweight enough that a user can easily lift it, the user can place the compartment 10 in the desired position by surrounding the table and chairs placed on the ground F.

[0042] Here, the compartment body 12 has wall panels 121 that cover the inner and outer sides of the compartment body 12. The wall panels 121 are used, for example, as an outer wall and as a partition wall. It should be noted that the wall panels 121 can also be a double structure, and even a multi-layer structure. In this case, the outer wall panel of the wall panel 121 is the outer wall, and the inner wall panel is the partition wall.

[0043] Various measurement methods exist for determining the characteristics of the wall panel 121. Here, for example, such as... Figure 2 As shown, the sound insulation characteristics of the wall panel 121 were measured using a noise meter 22 and a loudspeaker 24. Additionally, in Figure 3 The use of Figure 2 The difference in sound pressure level between the noise meter 22 and the loudspeaker 24 in each case with / without the wall panel 121.

[0044] like Figure 2 As shown, the microphone of the noise meter 22 is positioned at a height of 120cm above the ground F and 30cm away from the wall panel 121. The speaker 24 is positioned at a height of 120cm above the ground F and 80cm away from the wall panel 121. The microphone of the noise meter 22 and the speaker 24 are separated by 110cm and the thickness of the wall panel 121 is adjusted so that they are positioned opposite each other.

[0045] It should be noted that, from Figure 2 The male voice emitted by the speaker 24 shown is the same content, the same volume, and the same frequency range as the presence or absence of the wall panel 121, and is within the frequency range of a person's voice in everyday conversation. Similarly, the female voice is the same content, the same volume, and the same frequency range as the presence or absence of the wall panel 121, and is within the frequency range of a person's voice in everyday conversation.

[0046] like Figure 3As shown, the sound pressure level difference, measured by the noise meter 22, is generated based on the presence or absence of the wall panel 121. When the wall panel 121 is present, the sound pressure level is lower compared to when it is absent. It can be seen that because of the generated sound pressure level difference, the wall panel 121 of the partition body 12 of the partition 10 in this embodiment exerts a sound absorption and sound insulation effect in white noise, male voices, and female voices. That is, the partition 10 using the wall panel 121 absorbs or insulates sound from the outside of the partition body 12 through the wall panel 121.

[0047] like Figure 1 As shown, when the main body of the compartment 12 is generally a quadrangular prism, the main body of the compartment 12 can be made into a square cylindrical shape, for example, by means of four wall panels 121. The four wall panels 121 can be either one piece or separate pieces.

[0048] In this embodiment, the partition body 12 has a ceiling portion 20 on the upper part of the wall panel 121. The ceiling portion 20 is formed, for example, from a wall panel of the same material and thickness as the wall panel 121. It should be noted that the ceiling portion 20 may also be formed from a different material than the wall panel 121.

[0049] A connecting portion 14 is provided in the ceiling portion 20. The connecting portion 14 is provided, for example, in the center of the ceiling portion 20. It is also preferable that the connecting portion 14 is provided on an end side offset from the center of the ceiling portion 20, near any one of the four wall panels 121 of the partition body 12.

[0050] In this embodiment, the connecting portion 14 is formed in a cylindrical shape. In this embodiment, the connecting portion 14 extends through the ceiling portion 20 in the vertical direction. Therefore, the connecting portion 14 connects the inner and outer sides of the partition body 12. The connecting portion 14 is formed, for example, in a cylindrical shape, a polygonal cylindrical shape, or a suitable cylindrical shape. The ceiling portion 20 and the connecting portion 14 are sealed without gaps.

[0051] like Figure 4 As shown, on the inner wall of the cylindrical connecting portion 14, an area-changing portion 16 is provided along a direction intersecting a certain surface (e.g., a surface parallel to the ground F), such that the spatial area of ​​the inner side of the connecting portion 14 varies multiple times in a stepped manner. The connecting portion 14 and the area-changing portion 16 are integrally formed, for example, from a wall panel of the same material and thickness as the wall panel 121. Alternatively, the connecting portion 14 and the area-changing portion 16 may be formed from a different material than the wall panel 121.

[0052] The area variation section 16 is configured such that the inside and outside of the compartment body 12 can be seen through. That is, the area variation section 16 is configured such that it can be passed through from one end to the other end, and also can be seen through from the other end to one end. Therefore, the area variation section 16 allows the inside and outside of the compartment 10 to be seen through.

[0053] When sound is input to one end along the airflow direction and output to the other end, the area change section 16 attenuates the sound pressure on the output side relative to the sound pressure on the input side. Assume that air flows in from the outside to the inside of the compartment body 12 through the area change section 16. At this time, the area changing section 16 sequentially includes the following spatial areas along the air flow direction: the area of ​​the first area section (regional definition surface) 161 (first region area) SA; the area of ​​the second area section (regional definition surface) 162 (second region area) SB (larger than the area of ​​the first area section 161 SA); the area of ​​the third area section (regional definition surface) 163 (third region area) SC (smaller than the area of ​​the second area section 162 SB); the area of ​​the fourth area section (regional definition surface) SD (larger than the area of ​​the third area section 163 SC (fourth region area) SD; the area of ​​the fifth area section (regional definition surface) SE (smaller than the area of ​​the fourth area section 164 SD (fifth region area) SE; the area of ​​the sixth area section (regional definition surface) 166 (sixth region area) SF (larger than the area of ​​the fifth area section 165 SE (sixth region area) SF); and the area of ​​the seventh area section (regional definition surface) SG (smaller than the area of ​​the sixth area section 166 SF (seventh region area) SG. The areas SA-SG of the first to seventh areas 161-167 are areas that are parallel to the ground F and areas that are orthogonal to the direction of air flow.

[0054] In this embodiment, the first to seventh area portions 161-167 form, for example, disk-shaped or cylindrical spaces having a common central axis C.

[0055] exist Figure 1 and Figure 4 In the area changing section 16 of this embodiment, the airflow direction is actually two directions: from top to bottom and from bottom to top. That is, air flows through the connecting section 14 from the outside of the compartment 10 to the inside of the compartment body 12, and from the inside of the compartment body 12 to the outside of the compartment 10. Furthermore, in this embodiment, the seventh area section 167 is disposed on the ceiling section 20, and the first area section 161 is disposed separately from the ceiling section 20.

[0056] The area variation section 16 has multiple reflective surfaces (first reflective surfaces) 1711, 1712, and 1713, which generate reflected sound, for example, a portion of a sound that is about to pass through the area variation section 16 from outside the compartment body 12 and enter the compartment body 12, is reflected towards the outside of the area variation section 16. Therefore, a portion of the sound traveling through the area variation section 16 and into the compartment body 12 is reduced by the reflective surfaces 1711, 1712, and 1713 of the area variation section 16. Thus, the interference of this reflected sound with the traveling sound reduces the sound pressure of the sound that is about to enter the compartment body 12 from the outside.

[0057] Furthermore, the area variation section 16 has multiple reflective surfaces (second reflective surfaces) 1721, 1722, and 1723, which generate reflected sound, for example, a portion of a sound that is to travel from inside the compartment body 12 through the area variation section 16 to the outside of the compartment body 12, is reflected towards the inside of the area variation section 16. Therefore, a portion of the sound traveling through the area variation section 16 to the outside of the compartment body 12 is reduced by the reflective surfaces 1721, 1722, and 1723 of the area variation section 16. Thus, the interference of this reflected sound with the traveling sound, and the sound pressure of the sound that is to travel from the inside of the compartment body 12 to the outside of the compartment body 12 are weakened.

[0058] It should be noted that reflective surfaces 1711 and 1721 are located in the second area portion 162, reflective surfaces 1712 and 1722 are located in the fourth area portion 164, and reflective surfaces 1713 and 1723 are located in the sixth area portion 166. In this embodiment, reflective surfaces 1711, 1712, 1713, 1721, 1722, and 1723 are formed by a combination of a surface parallel to the ground surface F and a surface adjacent to that surface that is parallel to the central axis C and orthogonal to the ground surface F. Reflective surfaces 1711, 1712, 1713, 1721, 1722, and 1723 can be formed by a single surface or by multiple surfaces. Reflective surfaces 1711, 1712, 1713, 1721, 1722, and 1723 can also be formed as curved surfaces.

[0059] Here, consideration will be given to Figure 4 The portion of the connected part 14 and the area change part 16, indicated by the symbol V, is extracted. Figure 5 The cylindrical body (partial) 30 is shown. The airflow direction within the cylindrical body 30 is assumed to be from... Figure 5 The air flows from the top to the bottom. At this time, the inner wall of the cylindrical body 30, which corresponds to a part of the area change section 16, has a flow path along the air flow direction, which includes a first small area section 311, a large area section 32, and a second small area section 312.

[0060] like Figure 5 As shown at the boundary between the first small area portion 311 and the large area portion 32, and the boundary between the large area portion 32 and the second small area portion 312 of the cylindrical body 30, the medium through which sound propagates changes at the stepped portion where the spatial area changes. Therefore, the acoustic impedance of the sound changes at the stepped portion.

[0061] Will Figure 5 The area of ​​the first small area portion 311 of the cylindrical body 30, which is orthogonal to the direction of air flow, is denoted as Aa, and the area of ​​the second small area portion 312, which is orthogonal to the direction of air flow, is denoted as Ac. At this time, the area Aa = Ac. The area of ​​the large area portion 32, which is orthogonal to the direction of air flow, is formed to be an area Ab that is larger than both the first small area portion 311 and the second small area portion 312. In addition, when λ is set as the wavelength of the sound, the area ratio of the area Aa of the first small area portion 311, the area Ac of the second small area portion 312, and the area Ab of the large area portion 32 is set as m = Ab / Aa = Ab / Ac, the coefficient is set as k = 2π / λ, and L is set as the length of the large area portion (enlarged portion) 32 along the direction of air flow (the distance between the first small area portion 311 and the second small area portion 312), the sound attenuation (dB) is expressed as shown in the following formula (1).

[0062] [Mathematical Expression 1]

[0063]

[0064] According to the parameters of equation (1), the attenuation of sound passing through the cylindrical body 30 depends on the length L and area ratio m of the large area portion 32. When the area ratio m increases, the attenuation of sound increases. Preferably, the difference between the area Aa of the first small area portion 311, the area Ac of the second small area portion 312, and the area Ab of the large area portion 32 is large. Therefore, to attenuate sound, it is preferable that the area Aa of the first small area portion 311 and the area Ac of the second small area portion 312 be as small as possible, and the area Ab of the large area portion 32 be as large as possible.

[0065] On the other hand, when based on the parameters of equation (1), the attenuation of the sound through the cylindrical body 30 does not depend on the shapes of the first small area portion 311, the second small area portion 312, and the large area portion 32. Therefore, the shapes of the first small area portion 311, the second small area portion 312, and the large area portion 32 can be appropriately set. Here, for the sake of simplicity, an example of the disk-shaped or cylindrical space of the first small area portion 311, the large area portion 32, and the second small area portion 312 extending around a common central axis will be described. That is, in this embodiment, the first small area portion 311 and the second small area portion 312 of the cylindrical body 30 are formed in a cylindrical or disk shape, and the large area portion 32 of the cylindrical body 30 is formed in a cylindrical or disk shape.

[0066] Figure 6 This diagram illustrates the relationship between the frequency (Hz) of a typical male and female voice and the sound pressure level (dB). The human audible range is generally considered to be from 20Hz to 20000Hz. The frequency range of a person's voice in everyday conversation is considered to be from 250Hz to 4000Hz. For example... Figure 6 As shown, the frequency of a male voice with an appropriate sound pressure level is in the range of 20 Hz to 4000 Hz, and the frequency of a female voice with an appropriate sound pressure level is in the range of 20 Hz to 7000 Hz. Therefore, in the compartment 10 according to this embodiment, sounds with frequencies ranging from 20 Hz to 7000 Hz will be described.

[0067] Figures 7 to 9 An example is shown of the simulation results of the attenuation (dB) of the sound of each cylindrical body 30 under conditions 1, 2 and 3 at frequencies ranging from 20 Hz to 7000 Hz.

[0068] As condition 1, set Figure 5 The first small area portion 311 and the second small area portion 312 of the cylindrical body 30 shown have radii ra = rc = 0.4 m, the radius of the large area portion 32 is rb = 0.9 m, and the length of the large area portion 32 is L(La) = 0.22 m. At this time, as... Figure 7 As shown, at approximately 800 Hz and its nth times (n is a natural number), the sound attenuation (dB) becomes 0. That is, the cylindrical body 30 (in condition 1) Figure 4 The first attenuation section 301 in the cylinder does not attenuate sounds at approximately 800 Hz and its nth multiples in the frequency range of 20 Hz to 7000 Hz, but it attenuates sounds that deviate from approximately 800 Hz and its nth multiples. Therefore, the cylindrical body 30 in condition 1 attenuates the amount of sound attenuation at the first frequency and frequencies n times the first frequency (n is a natural number) less than frequencies different from the first frequency and its multiples.

[0069] As condition 2, the radii of the first small area portion 311 and the second small area portion 312 of the cylindrical body 30 are set to ra = rc = 0.4m, the radius of the large area portion 32 is set to rb = 0.8m, and the length of the large area portion 32 is set to L(Lb) = 0.12m. At this time, as... Figure 8 As shown, the attenuation (dB) becomes 0 around 1450Hz and at n times (n is a natural number). That is, the cylindrical body 30 in condition 2 ( Figure 4 The second attenuation section 302 in the structure does not attenuate sounds at approximately 1450 Hz and its nth multiples in the frequency range of 20 Hz to 7000 Hz, but it attenuates sounds deviating from approximately 1450 Hz and its nth multiples. Therefore, the cylindrical body 30 in condition 2 attenuates sounds at the second frequency and its nth multiples (n is a natural number) smaller than frequencies different from the second frequency and its multiples.

[0070] As condition 3, the radii of the first small area portion 311 and the second small area portion 312 of the cylindrical body 30 are set to ra = rc = 0.4m, the radius of the large area portion 32 is set to rb = 0.7m, and the length of the large area portion 32 is set to L(Lc) = 0.07m. At this time, as... Figure 9 As shown, the attenuation (dB) becomes 0 around 2450 Hz and at n times (n is a natural number). That is, the cylindrical body 30 in condition 3 ( Figure 4 The third attenuation section 303 in the structure does not attenuate the sound at approximately 2450 Hz and its nth multiples in the frequency range of 20 Hz to 7000 Hz, but it attenuates the sound that deviates from approximately 2450 Hz and its nth multiples. Therefore, the cylindrical body 30 in condition 3 attenuates the sound at the third frequency and its nth multiples (n is a natural number) by a smaller amount compared to frequencies other than the third frequency and its multiples.

[0071] The sound is input to the first small area portion 311 of each cylindrical body 30, and the sound output from the second small area portion 312 is attenuated relative to the sound input to the first small area portion 311, except for a predetermined frequency. Therefore, each cylindrical body 30 (first to third attenuation portions 301, 302, 303) performs the function of attenuating the sound pressure level as a unit.

[0072] The radii ra of the first small area portion 311 and the radii rc of the second small area portion 312 of each cylindrical body 30 in conditions 1, 2, and 3 are the same. They are the same as the first area portion 161, third area portion 163, fifth area portion 165, and seventh area portion 167 of the area variation portion 16. Therefore, when the second small area portion 312 of the cylindrical body 30 (first attenuation portion 301) in condition 1 is integrated or spliced ​​with the first small area portion 311 of the cylindrical body 30 (second attenuation portion 302) in condition 2 along the airflow direction, and when the second small area portion 312 of the cylindrical body 30 (second attenuation portion 302) in condition 2 is integrated or spliced ​​with the first small area portion 311 of the cylindrical body 30 (third attenuation portion 303) in condition 3 along the airflow direction, as... Figure 4 As shown, area variation section 16 is formed.

[0073] It should be noted that the areas of the second area 162 (SB), the fourth area 164 (SD), and the sixth area 166 (SF) of the three large area sections 32 of the cylindrical body 30 in the area variation section 16 are different.

[0074] Furthermore, the length L of condition 1 corresponds to the length La of the second area portion 162 of the area change portion 16. The length L of condition 2 corresponds to the length Lb of the fourth area portion 164 of the area change portion 16. The length L of condition 3 corresponds to the length Lc of the sixth area portion 166 of the area change portion 16.

[0075] The lengths La, Lb, and Lc of the second area portion 162, the fourth area portion 164, and the sixth area portion 166, which correspond to the three large area portions 32 of the cylindrical body 30, in the area variation section 16 are different. That is, the distance La between the first area portion 161 and the third area portion 163, the distance Lb between the third area portion 163 and the fifth area portion 165, and the distance Lc between the fifth area portion 165 and the seventh area portion 167 are different from each other.

[0076] In this way, the area variation section 16 is formed as an assembly of different cylindrical bodies 30 that form air flow paths.

[0077] In this embodiment, the area variation portion 16 has first reflective surfaces 1711, 1712, and 1713 that reflect a portion of the sound that is to pass through the area variation portion 16 from the outside of the compartment body 12 and enter the compartment body 12 back to the outside of the compartment body 12, thereby increasing the change in acoustic impedance. Additionally, the area variation portion 16 has second reflective surfaces 1721, 1722, and 1723 that reflect a portion of the sound that is to pass through the area variation portion 16 from the inside of the compartment body 12 and exit to the outside of the compartment body 12 back to the inside of the compartment body 12, thereby increasing the change in acoustic impedance. To increase the change in acoustic impedance, it is preferable that the areas of the first reflective surfaces 1711, 1712, and 1713 and the second reflective surfaces 1721, 1722, and 1723 are as large as possible. Furthermore, as... Figure 4 As shown, the first reflective surfaces 1711, 1712, and 1713 are oriented as far outward as possible from the partition body 12 within the area variation section 16. Furthermore, as... Figure 4 As shown, the second reflective surfaces 1721, 1722, and 1723 are oriented as much as possible toward the inside of the compartment body 12 within the area variation section 16.

[0078] Next, the function of the compartment 10 involved in this embodiment will be explained.

[0079] The area change section 16 allows a view through from one end to the other without obstructing airflow between the inner and outer sides of the compartment body 12. Furthermore, when the compartment 10 is used indoors, for example, a user inside the compartment body 12 can see the ceiling through the area change section 16. Therefore, air flows through the area change section 16 between the inner and outer sides of the compartment body 12. For example, when the compartment 10 is used indoors, the air with temperature and humidity adjusted by the indoor air conditioning automatically exchanges with the air inside the compartment body 12. Therefore, even without installing air conditioning equipment in the compartment 10, such as the ceiling section 20, air from the outside of the compartment 10 will pass through the area change section 16 and enter the inside of the compartment 10. Therefore, the compartment 10 of this embodiment prevents the compartment body 12 from becoming hot, for example, during hot seasons such as summer. Therefore, even when the compartment 10 of this embodiment is used, for example, as a work cubicle, air conditioning equipment is not required, preventing cost increases for the compartment 10.

[0080] Furthermore, as described above, air flows between the inner and outer sides of the compartment body 12 through the area change section 16. Therefore, the air inside the compartment body 12 is automatically exchanged with the air inside the compartment body 12. Consequently, the compartment 10 according to this embodiment prevents odors from accumulating inside the compartment body 12.

[0081] In this embodiment, the area variation section 16 of the compartment 10 is integrated, for example, the cylindrical body 30 (first attenuation section 301) under condition 1, the cylindrical body 30 (second attenuation section 302) under condition 2, and the cylindrical body 30 (third attenuation section 303) under condition 3. In this case, the cylindrical body 30 under condition 1 attenuates the sound attenuation of the first frequency and frequencies n times the first frequency (n is a natural number) less than frequencies different from the first frequency and its nth multiples. The cylindrical body 30 under condition 2 attenuates the sound attenuation of the second frequency (different from the first frequency) and frequencies n times the second frequency (n is a natural number) less than frequencies different from the second frequency and its nth multiples. The cylindrical body 30 under condition 3 attenuates the sound attenuation of the third frequency (different from the first frequency and the second frequency) and frequencies n times the third frequency (n is a natural number) less than frequencies different from the third frequency and its nth multiples. The first frequency, the second frequency, and the third frequency are different from each other. Therefore, the area variation section 16 is integrated according to the... Figures 7 to 9 The theoretical result is obtained by superimposing the sound attenuation (dB) of the cylindrical body 30 under conditions 1, 2, and 3 as shown. Figure 10 The attenuation characteristics of the sound are shown.

[0082] like Figure 10 As shown, the area variation section 16 does not have any frequencies within a predetermined frequency range (20Hz to 7000Hz) where the attenuation (dB) is 0 (dB). Therefore, at any frequency from 20Hz to 7000Hz, the sound pressure of a sound input to one end of the area variation section 16 and output to the other end is always attenuated relative to one end at the other end. For example, sounds at frequencies of 800Hz and their nth multiples are not attenuated in the cylindrical section 30 (first attenuation section 301) of the area variation section 16 under condition 1, but are attenuated in the cylindrical section 30 (second attenuation section 302) under condition 2 and the cylindrical section 30 (third attenuation section 303) under condition 3, respectively.

[0083] For example, sounds at 1450 Hz and its nth harmonics are attenuated in the cylindrical body 30 of the area change section 16 under condition 1, not attenuated in the cylindrical body 30 of condition 2, and attenuated in the cylindrical body 30 of condition 3. For example, sounds at 2450 Hz and its nth harmonics are attenuated in the cylindrical body 30 of the area change section 16 under conditions 1 and 2, and not attenuated in the cylindrical body 30 of condition 3.

[0084] In this embodiment, sounds other than those at 800Hz, 1450Hz, 2450Hz, and their nth multiples of frequency, passed through the area variation section 16, are attenuated three times. On the other hand, sounds at 800Hz, 1450Hz, 2450Hz, and their nth multiples of frequency, passed through the area variation section 16, are attenuated twice. Therefore, sounds at 800Hz, 1450Hz, 2450Hz, and their nth multiples of frequency in male and female voices are attenuated as they pass through the area variation section 16 from the outside of the compartment body 12 and reach the inside of the compartment body 12.

[0085] Therefore, when the area variation section 16 forms an airflow path connecting the inside and outside of the compartment body 12, the sound waves of various frequencies of male and female voices generated on the outside of the compartment body 12 are attenuated when they pass through the area variation section 16 and reach the inside of the compartment body 12. Furthermore, the area variation section 16 is appropriately sized to accommodate the reflective surfaces 1711, 1712, and 1713, with the reflective surfaces 1711, 1712, and 1713 facing outwards from the compartment body 12. Therefore, a portion of the sound waves of various frequencies of male and female voices generated on the outside of the compartment body 12 are reflected by the reflective surfaces 1711, 1712, and 1713 when passing through the area variation section 16. Thus, a portion of the sound waves that would otherwise enter the inside of the compartment body 12 from the outside will not reach the inside of the compartment body 12. Additionally, the wall panels 121 of the compartment 10 function as sound absorbers or insulators. Therefore, the interior of the compartment 10 is a quieter single-room space than the exterior of the compartment 10. Therefore, the user of the inner compartment 10 can work or perform tasks in a quiet environment.

[0086] Furthermore, the sounds of male and female voices generated inside the compartment body 12 attenuate when they pass through the area change section 16 to the outside of the compartment body 12. Additionally, the area change section 16 is appropriately sized to accommodate the reflective surfaces 1721, 1722, and 1723, with the reflective surfaces 1721, 1722, and 1723 facing inwards towards the compartment body 12. Therefore, a portion of the sounds of male and female voices generated inside the compartment body 12 are reflected by the reflective surfaces 1721, 1722, and 1723 when passing through the area change section 16. Consequently, a portion of the sound that would otherwise travel from inside the compartment body 12 to the outside does not reach the outside of the compartment body 12. Furthermore, the wall panels 121 of the compartment 10 function as sound absorbers or insulators. Therefore, even if a large sound is generated inside the compartment 10, it propagates outside the compartment 10 as a smaller sound than inside the compartment 10. Therefore, when a user in a compartment 10 located inside the compartment 10 makes a sound, such as through a web conference or telephone, it can prevent the sound or noise inside the compartment 10 from leaking outside the compartment 10.

[0087] Furthermore, it is preferable that the areas SA, SC, SE, and SG of the first area portion 161, the third area portion 163, the fifth area portion 165, and the seventh area portion 167 of the area variation portion 16 are as small as possible, and the areas SB, SD, and SF of the second area portion 162, the fourth area portion 164, and the sixth area portion 166 are as large as possible. In this case, the area variation portion 16 can increase the attenuation effect of sound propagation from the outside to the inside of the compartment 10 and sound propagation from the inside to the outside of the compartment 10.

[0088] Furthermore, in this configuration, the area variation section 16 can form the first reflective surfaces 1711, 1712, and 1713 and the second reflective surfaces 1721, 1722, and 1723 in relatively large sizes. Additionally, the area variation section 16 can oriented the reflective surfaces 1711, 1712, and 1713 towards the outer side of the compartment body 12, and the reflective surfaces 1721, 1722, and 1723 towards the inner side of the compartment body 12. On the other hand, when the areas SA, SC, SE, and SG of the first area section 161, the third area section 163, the fifth area section 165, and the seventh area section 167 are too small, it is difficult to generate airflow between the inner and outer sides of the compartment 10. Therefore, the areas SA, SC, SE, and SG of the first area section 161, the third area section 163, the fifth area section 165, and the seventh area section 167 are preferably adjusted to facilitate airflow between the inner and outer sides of the compartment 10 and to achieve an appropriate sound attenuation effect.

[0089] Here, as Figure 11 As shown, in the comparative example of compartment 710, an example is considered where the area variation section 16 is not provided in the upper part of the compartment body 712, and only the opening 7120 is provided. The comparative example compartment 710 allows for easy exchange of air between the inside and outside of the compartment body 712. However, the comparative example compartment 710 does not have a sound attenuation mechanism and a reflection mechanism like the area variation section 16 of the compartment 10 of this embodiment. Therefore, sound from the outside of the comparative example compartment 710 may, for example, be reflected from the ceiling 700 of the building interior or pass through and diffract between the opening 7120 and the ceiling 700, entering the compartment body 712 through the opening 7120. In this case, there is no mechanism for sound absorption or sound insulation in the upper part of the compartment body 712.

[0090] In this embodiment, Figure 4The areas SB, SD, and SF of the second area portion 162, the fourth area portion 164, and the sixth area portion 166 of the area variation portion 16 shown are different from each other. Furthermore, the distances La between the first area portion 161 and the third area portion 163, Lb between the third area portion 163 and the fifth area portion 165, and Lc between the fifth area portion 165 and the seventh area portion 167 are different. Therefore, the compartment 10 according to this embodiment can attenuate the sound frequencies of male and female voices entering from the outside of the compartment body 12, and can also attenuate the sound frequencies of male and female voices transmitted from the inside of the compartment body 12 to the outside, through the area variation portion 16. In addition, the compartment 10 according to this embodiment can reflect sound emitted from the outside of the compartment body 12 towards the outside of the compartment body 12 through the reflective surfaces 1711, 1712, and 1713. In addition, the compartment 10 in this embodiment can reflect the sound emitted from the inside of the compartment body 12 toward the inside of the compartment body 12 through the reflective surfaces 1721, 1722, and 1723.

[0091] Therefore, the compartment 10 according to this embodiment allows for easy exchange of air inside and outside the compartment 10, and achieves better sound absorption or sound insulation effects than the compartment 710 of the comparative example. Thus, according to this embodiment, a compartment 10 that creates a quiet area without obstructing the flow of air inside and outside can be provided.

[0092] In this embodiment, examples of providing reflective surfaces 1711 and 1721 in the second area portion 162, 1712 and 1722 in the fourth area portion 164, and 1713 and 1723 in the sixth area portion 166 are described. Depending on the usage pattern, such as the placement of the compartment 10, at least one of the reflective surfaces 1711, 1712, 1713, 1721, 1722, and 1723 is sufficient. That is, at least one of the second area portion 162, the fourth area portion 164, and the sixth area portion 166 of the area variation portion 16 only needs to have at least one of a first reflective surface that reflects sound passing through the area variation portion 16 toward the inside of the compartment body 12 to the outside of the compartment body 12, and a second reflective surface that reflects sound passing through the area variation portion 16 toward the outside of the compartment body 12 to the inside of the compartment body 12. In this case, the area variation section 16 can significantly change the acoustic impedance at the boundaries of the first area section 161, the third area section 163, the fifth area section 165, and the seventh area section 167 adjacent to the reflecting surface, thereby attenuating the sound pressure of the sound passing through the area variation section 16. Furthermore, the area variation section 16 can reflect sound in the desired direction through its reflecting surface.

[0093] In this embodiment, as an example of forming the area variation section 16, examples of integrating or splicing the cylindrical body 30 of condition 2 with the cylindrical body 30 of condition 1, and integrating or splicing the cylindrical body 30 of condition 3 with the cylindrical body 30 of condition 2 have been described. For example, the cylindrical body 30 of condition 1 and the cylindrical body 30 of condition 2 may also be integrated or spliced, and the cylindrical body 30 of condition 3 and the cylindrical body 30 of condition 1 may also be integrated or spliced. In this way, when multiple cylindrical bodies 30 are used to form the area variation section 16, the order of the cylindrical bodies 30 of condition 1, condition 2, and condition 3 can be appropriately set.

[0094] In this embodiment, such as Figure 5 As shown, an example is given where the area Ab of the large-area portion 32 of the cylindrical body 30 is constant at a predetermined distance L. For example... Figure 12 As shown, the area Ab of the large area portion 32 is preferably not constant at a predetermined distance L, but is formed such that, for example, it approaches the area Aa of the first small area portion 311 as it moves towards the upper side of the cylindrical body 30. In this case, the area variation portion 16 of the compartment 10 can be asymmetrical with respect to the predetermined central axis C of the connecting portion 14. When the area variation portion 16 is formed, it can be... Figure 12 The cylindrical body 30 shown and Figure 5 The cylindrical body shown is spliced ​​together in 30 sections.

[0095] like Figure 13 As shown, the area Ab of the large area portion 32 is preferably a constant area Aba at a predetermined distance, and is formed such that the area Abb approaches the area Aa of the first small area portion 311 as it moves from the middle towards, for example, the upper side of the cylindrical body 30. When the area variation portion 16 is formed, it can be... Figure 13 The cylindrical body 30 shown and Figure 5 The cylindrical body 30 shown is assembled. Additionally, it can be... Figure 12 The cylindrical body 30 shown Figure 13 The cylindrical body 30 shown and Figure 5 The cylindrical body 30 shown is integrally formed or spliced ​​to form the area variation section 16.

[0096] In addition, in this embodiment, such as Figure 5 As shown, an example is given in which the area Aa of the first small area portion 311 and the area Ac of the second small area portion 312 are the same in each cylindrical body 30. Figure 14 As shown, the spatial area Aa of the first small area portion 311 and the spatial area Ac of the second small area portion 312 in each cylindrical body 30 can also be different. When the area variation portion 16 is formed, it can be... Figure 14 The cylindrical body 30 shown and Figure 5 The cylindrical body 30 shown is assembled. Additionally, it can be... Figure 12 The cylindrical body 30 shown Figure 13 The cylindrical body 30 shown Figure 14 The cylindrical body 30 shown and Figure 5 The cylindrical body 30 shown is integrally formed or spliced ​​to form the area variation section 16.

[0097] As explained above, according to this embodiment, a compartment 10 can be provided that creates a quiet area without obstructing the flow of air between the inside and outside.

[0098] [First Variation]

[0099] Next, use Figure 15 and Figure 16 To illustrate the first variation of the first embodiment, the compartment 10 involved.

[0100] like Figure 1 and Figure 4 As shown, in the compartment 10 of the first embodiment, for the use of 3 Figure 5 The example shown illustrates how a cylindrical body 30 can be integrally formed or spliced ​​together to create an area variation section 16. For example... Figure 15 As shown, in the first variation of compartment 10, instead of 3, it is 10. Figure 5 The example shown is an example of two cylindrical bodies 30 integrated or spliced ​​together along the direction of air flow to form an area variation section 16.

[0101] like Figure 15 As shown, the area variation section 16 of the compartment 10 involved in this modification includes, along the airflow direction, a first area section 161, a second area section 162 with an area SB larger than the area SA of the first area section 161, a third area section 163 with an area SC smaller than the area SB of the second area section 162, a fourth area section 164 with an area SD larger than the area SC of the third area section 163, and a fifth area section 165 with an area SE smaller than the area SD of the fourth area section 164. The areas SB and SD of the second area section 162 and the fourth area section 164 of the area variation section 16 are different from each other, as are the distances La between the first area section 161 and the third area section 163 and Lb between the third area section 163 and the fifth area section 165.

[0102] Figure 15 The area change section 16 shown here changes by... Figure 7 and Figure 8 The theoretical result is obtained by superimposing the sound attenuation (dB) of the cylindrical body 30 under conditions 1 and 2 as shown. Figure 16 The attenuation characteristics of the sound are shown.

[0103] like Figure 16As shown, the area change section 16 does not have any frequencies within the predetermined frequency range (20Hz to 7000Hz) where the attenuation (dB) is 0 (dB). Therefore, at any frequency between 20Hz and 7000Hz, the sound pressure of the sound passing through the area change section 16 will necessarily be attenuated.

[0104] Therefore, even though there is an airflow path in compartment 10 that connects the inside and outside of compartment body 12, when the area change portion 16 forms its flow path, the sounds of various frequencies generated on the outside of compartment body 12 will attenuate when they pass through the connecting portion 14 to reach the inside of compartment body 12. Furthermore, the sounds of various frequencies generated on the inside of compartment body 12 will attenuate when they pass through the connecting portion 14 to reach the outside of compartment body 12.

[0105] It should be noted that the relationship between the attenuation of the sound of each area change section 16 and the frequency depends on the number of connecting cylindrical bodies 30 and the shape of the cylindrical bodies 30 forming each area change section 16.

[0106] Furthermore, a portion of the sound at various frequencies generated on the outside of the compartment body 12 is reflected by the reflective surfaces 1711 and 1712 when passing through the area change portion 16. Therefore, a portion of the sound that would otherwise travel from the outside of the compartment body 12 to the inside will not reach the inside of the compartment body 12. Additionally, the wall panels 121 of the compartment 10 function as sound absorbers or insulators. Therefore, the interior of the compartment 10 is a quieter single-room space than the exterior of the compartment 10. Consequently, the user of the compartment 10 located on the interior side of the compartment 10 can perform tasks, such as work, in a quiet environment.

[0107] Furthermore, a portion of the sound at various frequencies generated inside the compartment body 12 is reflected at the reflecting surfaces 1721 and 1722 when passing through the area change portion 16. Therefore, a portion of the sound that would otherwise travel from the inside to the outside of the compartment body 12 does not reach the outside of the compartment body 12. Additionally, the wall panel 121 of the compartment 10 functions as sound absorber or sound insulator. Therefore, even if a large sound is generated inside the compartment 10, it propagates outside the compartment 10 as a smaller sound than that inside the compartment 10.

[0108] Therefore, according to this modified example, a compartment 10 can be provided to form a quiet area without obstructing the flow of air between the inside and outside.

[0109] In this modified example, an example in which reflective surfaces 1711 and 1721 are provided in the second area portion 162 and reflective surfaces 1712 and 1722 are provided in the fourth area portion 164 has been described. Depending on the usage pattern, such as the placement of the compartment 10, at least one of the reflective surfaces 1711, 1712, 1721, and 1722 is sufficient. That is, at least one of the second area portion 162 and the fourth area portion 164 of the area variation portion 16 need to have at least one of the following: a first reflective surface that reflects sound passing through the area variation portion 16 toward the inside of the compartment body 12 to the outside of the compartment body 12, and a second reflective surface that reflects sound passing through the area variation portion 16 toward the outside of the compartment body 12 to the inside of the compartment body 12. In this case, the area variation section 16 can cause a large change in acoustic impedance at the boundaries of the first area section 161, the third area section 163, and the fifth area section 165 adjacent to the reflecting surface, thereby attenuating the sound pressure of the sound passing through the area variation section 16. In addition, the area variation section 16 can reflect the sound in the desired direction through its reflecting surface.

[0110] Compartment 10 can also accommodate 4 or more Figure 5 The cylindrical bodies 30 shown are integrally formed or connected to form the area variation section 16.

[0111] [Second variation]

[0112] Next, use Figure 17 The second variation of the first embodiment will be described.

[0113] like Figure 17 As shown, in the area variation section 16 of compartment 10, the areas SA of the first area portion 161 orthogonal to the central axis C, SC of the third area portion 163, and SE of the fifth area portion 165 are the same. Furthermore, the areas SB of the second area portion 162 orthogonal to the central axis C and SD of the fourth area portion 164 in the area variation section 16 of compartment 10 are the same. On the other hand, the distance La between the first area portion 161 and the third area portion 163 is smaller than the distance Lb between the third area portion 163 and the fifth area portion 165. Therefore, when based on equation (1), the fundamental frequencies of the non-attenuated sounds of the cylindrical body 30 containing the second area portion 162 of the area variation section 16 and the cylindrical body 30 containing the fourth area portion 164 are different.

[0114] Therefore, according to the principle of coincidence, Figure 17 The area variation section 16 of the compartment 10 shown is, for example, as... Figure 16Theoretically, this provides the characteristic of attenuating sound frequencies from 20Hz to 7000Hz. Therefore, even if the distances La and Lb are different, the area SB of the second area portion 162 and the area SD of the fourth area portion 164 are the same, the area variation portion 16 of the partition 10 can attenuate sound frequencies from 20Hz to 7000Hz passing through the area variation portion 16.

[0115] [Third variation]

[0116] Next, use Figure 18 The compartment 10 involved in the third variation of the first embodiment will be described.

[0117] exist Figure 18 In the area variation section 16 of the compartment 10 shown, the distance La between the first area section 161 and the third area section 163 and the distance Lb between the third area section 163 and the fifth area section 165 are the same. In the area variation section 16 of the compartment 10, the area SA of the first area section 161, the area SC of the third area section 163, and the area SE of the fifth area section 165, which are orthogonal to the central axis C, are the same. However, in the area variation section 16 of the compartment 10, the area SB of the second area section 162 and the area SD of the fourth area section 164, which are orthogonal to the central axis C, are different. Therefore, when based on equation (1), the fundamental frequencies of the non-attenuated sounds of the cylindrical body 30 containing the second area section 162 of the area variation section 16 are different from those of the cylindrical body 30 containing the fourth area section 164.

[0118] Therefore, according to the principle of coincidence, Figure 17 The area variation section 16 of the compartment 10 shown is, for example, as... Figure 16 Theoretically, this provides the characteristic of attenuating sound frequencies from 20Hz to 7000Hz. Therefore, if the area SB of the second area portion 162 and the area SD of the fourth area portion 164 are different, even if the distances La and Lb are the same, the area variation portion 16 of the partition 10 can attenuate sound frequencies from 20Hz to 7000Hz passing through the area variation portion 16.

[0119] According to the first embodiment including various modifications, such as Figure 17 and Figure 18As shown in the example of compartment 10, the area variation section 16 is formed by combining at least two cylindrical bodies 30. The area variation section 16 only needs to have at least one of the following: the area SB of the second area section 162 and the area SD of the fourth area section 164 are different from each other; the distance La between the first area section 161 and the third area section 163 and the distance Lb between the third area section 163 and the fifth area section 165 are different from each other. In this case, the area variation section 16 can theoretically achieve the characteristic of attenuating sound at frequencies from 20Hz to 7000Hz. Therefore, it is possible to suppress the sound pressure of sound entering the inner side of compartment 10 from the outside through the area variation section 16, and to suppress the sound pressure of sound transmitting from the inner side of the compartment to the outside. Therefore, according to this embodiment including various modifications, it is possible to provide a compartment 10 that forms a quiet area without obstructing the flow of air between the inside and outside.

[0120] [Second Implementation]

[0121] Next, use Figure 19 The second embodiment of compartment 10 will be described. This embodiment is yet another variation of the first embodiment, which includes various modifications.

[0122] As described above, according to equation (1), the attenuation of sound through the cylindrical body 30 theoretically does not depend on the shapes of the first small area portion 311, the second small area portion 312, and the large area portion 32. Therefore, as Figure 19 As shown, the area variation portion 16 of the compartment 10 may not be symmetrical with respect to the predetermined central axis C of the connecting portion 14.

[0123] According to this embodiment, a compartment 10 can be provided to form a quiet area without obstructing the flow of air between the inside and outside.

[0124] [Third Implementation Method]

[0125] Next, use Figure 20 The second embodiment of compartment 10 will be described. This embodiment is yet another variation of the first and second embodiments, which include various modifications.

[0126] As described above, in the first and second embodiments of the compartment 10, an example in which a connecting portion 14 and an area variation portion 16 are provided in the ceiling portion 20 of the compartment body 12 is described.

[0127] like Figure 20 As shown, the connecting portion 14 and the area changing portion 16 can be provided at a position offset from the ceiling portion 20. Preferably, the connecting portion 14 and the area changing portion 16 are provided at the upper part of the partition body 12.

[0128] Connecting part and area change part 16 and Figure 4The shapes shown are, for example, the same. In this embodiment, the areas of the first to seventh area portions 161-167 of the area variation portion 16 of the compartment 10 are respectively areas orthogonal to the ground F and areas of surfaces orthogonal to the airflow direction.

[0129] According to this embodiment, a compartment 10 can be provided to form a quiet area without obstructing the flow of air between the inside and outside.

[0130] [Fourth Implementation Method]

[0131] Next, use Figure 21 The fourth embodiment of compartment 10 will be described. This embodiment is yet another variation of the first, second, and third embodiments, which include various modifications.

[0132] As described above, in the first and second embodiments, examples of a connecting portion 14 and an area variation portion 16 protruding outward relative to the ceiling portion 20 of the compartment body 12 have been explained. That is, as... Figure 1 and Figure 4 As shown, an example is given in which the lower end of the area variation part 16 is disposed on the ceiling part 20 and the upper end of the area variation part 16 is disposed on the outside of the partition body 12.

[0133] like Figure 21 As shown, in this embodiment, the lower end of the area-changing portion 16 is disposed inside the compartment body 12, and the upper end of the area-changing portion 16 is disposed on the ceiling portion 20 of the compartment body 12. In this way, the connecting portion 14 and a portion of the area-changing portion 16 can also not protrude outward relative to the ceiling portion 20.

[0134] It should be noted that, in Figure 20 In the third embodiment shown, an example is described where a connecting portion 14 and an area-changing portion 16 protrude outward relative to the upper part of the compartment body 12. It is also preferable that the connecting portion 14 and the area-changing portion 16 do not protrude outward relative to the compartment body 12.

[0135] According to this embodiment, a compartment 10 can be provided to form a quiet area without obstructing the flow of air between the inside and outside.

[0136] [Fifth Implementation Method]

[0137] use Figure 22 and Figure 23 The compartment 10 according to the fifth embodiment will be described. The compartment 10 according to this embodiment is a variation of the compartment 10 described in the first to fourth embodiments. Components that are the same as or have the same function as the compartment 10 described in the first to fourth embodiments are marked with the same symbols and their descriptions are omitted.

[0138] like Figure 22 and Figure 23 As shown, the partition body 12 of the partition 10 in this embodiment does not have a ceiling portion 20. In this embodiment, the position of the partition body 12 opposite to the ground F side serves as the opening of the connecting portion 14. Furthermore, an area variation portion 16 is provided in the connecting portion 14.

[0139] In this embodiment, the area changing portion 16 comprises a first annular body 41, a second annular body 42, and a third annular body 43 sequentially from top to bottom. The first annular body 41, the second annular body 42, and the third annular body 43 are annular rings with openings in the center. The shapes of the openings of the first annular body 41, the second annular body 42, and the third annular body 43 are appropriately set to circles, ellipses, n-sided polygons, etc. The first annular body 41, the second annular body 42, and the third annular body 43 may be formed as plates, for example. Thus, the area changing portion 16 may not be integral.

[0140] It should be noted that the first annular body 41 has an area SA of a first area portion 161 as its spatial area. The second annular body 42 has an area SC of a third area portion 163 as its spatial area. The third annular body 43 has an area SE of a fifth area portion 165 as its spatial area. Furthermore, the area changing portion 16 has an area SB of a second area portion 162 as its spatial area between the first annular body 41 and the second annular body 42. The area changing portion 16 also has an area SD of a fourth area portion 164 between the second annular body 42 and the third annular body 43.

[0141] The area SB of the second area portion 162 and the area SD of the fourth area portion 164 are the same, but the length La of the second area portion 162 (the distance between the first annulus 41 and the second annulus 42) along the air flow direction is shorter than the length Lb of the fourth area portion 164 (the distance between the second annulus 42 and the third annulus 43) along the air flow direction.

[0142] Therefore, the area change portion 16 involved in this embodiment becomes the same as... Figure 17 The area change section 16 shown has the same structure. Therefore, the area change section 16 according to this embodiment will attenuate the sound entering from the outside of the compartment body 12 to the inside, and attenuate the sound that will be transmitted from the inside of the compartment body 12 to the outside.

[0143] The second annular body 42 of the area variation section 16 has a reflective surface 1711, which generates a portion of a sound, for example, that is about to pass through the inner side of the area variation section 16 of the connecting section 14 and enter the compartment body 12, and reflects it towards the outer side of the connecting section 14. The third annular body 43 of the area variation section 16 has a reflective surface 1712, which generates a portion of a sound, for example, that is about to pass through the inner side of the connecting section 14 and enter the compartment body 12, and reflects it towards the outer side of the connecting section 14.

[0144] Therefore, the sound entering from the outside to the inside of the compartment body 12 is reflected by the reflective surfaces 1711 and 1712. Thus, the area variation section 16 can reduce the sound entering from the outside to the inside of the compartment body 12 not only through sound attenuation but also through sound reflection.

[0145] The first annular body 41 of the area changing section 16 has a reflective surface 1721, which generates a portion of a sound transmitted from the inside of the area changing section 16, which is about to pass through the outside of the connecting section 14, to the outside of the compartment body 12, and reflects it towards the inside of the connecting section 14. The second annular body 42 of the area changing section 16 has a reflective surface 1722, which generates a portion of a sound transmitted from the inside of the area changing section 16, which is about to pass through the outside of the connecting section 14, to the outside of the compartment body 12, and reflects it towards the inside of the connecting section 14. The third annular body 41 of the area changing section 16 has a reflective surface 1723, which generates a portion of a sound transmitted from the inside of the area changing section 16, which is about to pass through the outside of the connecting section 14, to the outside of the compartment body 12, and reflects it towards the inside of the connecting section 14.

[0146] Therefore, the sound that is to be transmitted from the inside to the outside of the compartment body 12 is reflected by the reflective surfaces 1721 and 1722. Thus, the area change section 16 can reduce the sound that is to be transmitted from the inside to the outside of the compartment body 12 not only by attenuating the sound but also by reflecting the sound.

[0147] According to this embodiment, a compartment 10 can be provided to form a quiet area without obstructing the flow of air between the inside and outside.

[0148] In this embodiment, the area-changing portion 16 is formed by plate-like members of a first annular body 41, a second annular body 42, and a third annular body 43, which can be fixed only to, for example, the upper part of the compartment body 12. Therefore, in the compartment 10 according to this embodiment, the assembly of the area-changing portion 16 at the installation location of the compartment 10 becomes easy.

[0149] According to at least one of the embodiments described above, the partition 10 can form a quiet area without blocking the flow of air between the inside and outside.

[0150] While several embodiments have been described, these embodiments are merely illustrative and not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and likewise within the scope of the invention as described in the claims and its equivalents.

Claims

1. A compartment, characterized in that, have: Box-shaped compartment main body; A connecting portion is provided in the main body of the compartment, enabling communication between the inside and outside of the main body of the compartment; and The area-changing section changes its spatial area multiple times along the airflow direction passing through the connecting section, in a direction intersecting the airflow direction. The area-changing section, along the flow direction, sequentially comprises a first region area, a second region area larger than the first region area, a third region area smaller than the second region area, a fourth region area larger than the third region area, and a fifth region area smaller than the fourth region area as the spatial area. The areas of the second and fourth regions of the area-changing portion are different from each other, as are the distances between the area-defined surface having the first area area and the area-defined surface having the third area area, and the distances between the area-defined surface having the third area area and the area-defined surface having the fifth area area. At least one of the area-defined surface of the area-changing portion having the second area area and the area-defined surface having the fourth area area has at least one of a first reflective surface and a second reflective surface. The first reflective surface reflects sound traveling from the outside of the compartment body through the area-changing portion toward the inside of the compartment body back to the outside of the compartment body. The second reflective surface reflects sound traveling from the inside of the compartment body through the area-changing portion toward the outside of the compartment body back to the inside of the compartment body.

2. The compartment according to claim 1, wherein, The connecting part is located on the upper part of the main body of the compartment.

3. The compartment according to claim 1 or claim 2, wherein, The first reflective surface is oriented in a direction that reflects sound traveling from the outside of the compartment body through the area change portion toward the inside of the compartment body back to the outside of the compartment body. The second reflective surface is oriented in a direction that reflects sound traveling from the inside of the compartment body through the area change portion toward the outside of the compartment body back to the inside of the compartment body.

4. The compartment according to claim 1 or claim 2, wherein, The area variation section is configured such that the inside and outside of the main compartment can be seen through.

5. The compartment according to claim 3, wherein, The area variation section is configured such that the inside and outside of the main compartment can be seen through.

6. The compartment according to claim 1 or claim 2, wherein, The compartment body and the connecting part are sealed.

7. The compartment according to claim 3, wherein, The compartment body and the connecting part are sealed.

8. The compartment according to claim 4, wherein, The compartment body and the connecting part are sealed.

9. The compartment according to claim 1 or claim 2, wherein, The area variation portion can be asymmetrical relative to a predetermined central axis of the connecting portion.

10. The compartment according to claim 3, wherein, The area variation portion can be asymmetrical relative to a predetermined central axis of the connecting portion.

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