Floor structure with inter-floor noise prevention function for apartment complexes

Abstract

The present invention relates to a composite floor structure for reducing inter-floor noise in multi-unit housing. A vibration-damping board layer, an air layer, a dry mortar layer, a vibration-damping mat layer, and a finishing material layer are sequentially laminated on top of a reinforced concrete slab. The air layer consists of a frame and spacers that include a double grid structure and a vacuum control function to disperse sound waves and vibrations. Heating pipes are embedded within the mortar layer, and the area around the pipes is wrapped with vacuum tubes to block vibration transmission. Multiple elastic lines and embossed protrusions connected to the air layer effectively absorb and dampen impact energy. A vibration damping layer may be formed on top of the vibration-damping mat layer, and each grid hole contains a vibration module and a sensor. A controller analyzes vibration values ​​and generates canceling vibrations to actively eliminate noise. The perforated sound-absorbing material is composed of fiber-based or inorganic materials to absorb sound waves and provide hygiene and heat resistance. This structure simultaneously solves problems of inter-floor noise, vibration, and heat transfer, enabling the realization of a high-performance residential environment. This invention has very high applicability as a next-generation smart floor system integrating passive and active technologies.

Description

Technology Field

[0001] The present invention relates to a floor structure having a function to prevent inter-floor noise for multi-unit housing, and more specifically, to a floor structure for effectively preventing inter-floor noise generated in multi-unit housing, and more specifically, to a floor structure having a function to prevent inter-floor noise for multi-unit housing that minimizes the direct transmission of impact sound, vibration, and sound waves and disperses resonance frequencies through a composite structure formed in a multi-layer structure on top of a slab. Background Technology

[0002] Typically, multi-unit housing is structured so that multiple households live in adjacent units arranged vertically or horizontally within a single building.

[0003] Due to these structural characteristics, inter-floor noise issues frequently occur, where noise from upper-floor units is transmitted to lower-floor units through the slab; this is cited as one of the main causes of conflict among residents and a decline in living satisfaction.

[0004] Conventional apartment building floor structures are generally constructed such that a cement mortar layer is formed on top of a concrete slab, and finishing materials such as flooring or linoleum are installed on top of it.

[0005] This integrated structure has the disadvantage of being particularly vulnerable to heavy impact noise (e.g., a child jumping, the sound of furniture being dragged) because the impact generated from the floor layer is transmitted directly through the structure.

[0006] Furthermore, conventional structures lack a buffer layer capable of absorbing shock or dispersing vibration, as high-rigidity mortar and slabs are directly bonded. As a result, shocks generated by activities in the upper units are effectively transmitted to the lower units and perceived as everyday noise; in particular, the performance of blocking impact noise in the mid-to-low frequency range is very limited.

[0007] Furthermore, conventional floor structures typically feature a hot water circulation heating system, and these heating pipes are installed by being embedded within the slab or mortar layer. However, during the circulation of hot water through these pipes, additional problems arise, such as internal friction noise caused by the flow of hot water, noise generated by water hammer, transmission of structural vibrations due to minute pipe movements resulting from thermal expansion and contraction, direct transmission of vibrations through the structure when the pipes are in direct contact with the slab or finishing material, and repeated loosening and friction noise caused by temperature changes if pipe fixation is unstable depending on the construction conditions.

[0008] Problems caused by these heating pipes occur intensively depending on seasonal factors, and particularly during the winter season when heating usage is high, residents in lower units tend to sensitively perceive subtle vibrations and abnormal sounds within the structure, along with inter-floor noise.

[0009] Consequently, conventional floor structures face structural limitations in blocking impact noise, and also involve additional noise and vibration issues caused by heating pipes, making it difficult to expect substantial inter-floor noise reduction effects. Prior art literature

[0010] Republic of Korea Registered Patent No. 10-1624963 (Registration Date: May 23, 2016) The problem to be solved

[0011] The present invention relates to a floor structure for effectively preventing inter-floor noise generated in multi-unit housing, and more specifically, aims to minimize the direct transmission of impact sound, vibration, and sound waves and to disperse resonance frequencies through a composite structure formed as a multi-layer structure on top of a slab.

[0012] In particular, the present invention enables effective attenuation of impact sound and airborne sound across various frequency bands through an air layer structure composed of plastic spacers and an aluminum frame, a double grid array structure formed therein, and a perforated sound-absorbing material. Additionally, a plurality of auxiliary air passages connected to a dry mortar layer are formed around the perimeter of the air layer, which enables multipath dispersion of sound waves and dispersion of vibration energy.

[0013] Furthermore, by controlling the internal vacuum level through a vacuum supply system connected within the air layer, the pressure characteristics within the air layer can be actively changed in response to external shocks or vibrations. As a result, active noise control that responds to vibration environments in real time becomes possible, and the performance of blocking mid- and low-frequency impact noise is particularly improved.

[0014] Therefore, the ultimate objective of the present invention is to overcome the limitations of existing passive inter-floor noise reduction structures and to provide a floor structure having a passive and active composite blocking mechanism. means of solving the problem

[0015] The present invention provides a floor structure having a floor noise prevention function for multi-unit housing.

[0016] The floor structure comprises a slab layer made of reinforced concrete; a vibration-damping board layer formed on top of the slab layer, wherein a soundproofing sheet is attached to MDF or an inorganic board; an air layer formed on top of the vibration-damping board layer using plastic spacers; a dry mortar layer formed on top of the air layer, wherein the dry mortar layer is formed of lightweight mortar or EPS mixed mortar; a heating pipe embedded in the dry mortar layer through which heating water flows; a vibration-damping mat layer formed on top of the dry mortar layer, wherein the dry mortar layer is formed of urethane foam or rubber; and a finishing material layer formed on top of the vibration-damping mat layer, wherein the finishing material layer is formed of reinforced flooring or PVC tiles.

[0017] The thickness of the above dustproof mat layer is 10mm to 20mm or less, and

[0018] The thickness of the above dry mortar layer is 39 mm to 41 mm, and

[0019] The height of the above air layer is 19mm to 21mm, and

[0020] Around the perimeter of the air layer, a plurality of auxiliary air passages are formed that are connected to the perimeter of the heating pipe through the dry mortar layer.

[0021] Here, the air layer is,

[0022] An aluminum frame for forming an internal space of an air layer and maintaining the shape and structurally supporting the air layer, and

[0023] The plastic spacer disposed in the internal space of the frame, wherein

[0024] The plastic spacer includes first spacers forming a first grid arrangement and second spacers forming a second grid arrangement that is offset from the first grid arrangement.

[0025] delete

[0026] The above plurality of auxiliary air passages are,

[0027] A portion of the above frame is formed through extension tubes that are extended, and

[0028] It is preferable that the above extension tubes be formed in a zigzag shape.

[0029] And, a perforated sound-absorbing material with holes formed inside is inserted between the air layer and the dry mortar layer, and

[0030] The above-mentioned perforated sound-absorbing material is,

[0031] It comprises 80% to 90% by weight of polyester fibers, and

[0032] It contains 5% to 15% by weight of a thermoplastic binder resin,

[0033] It contains 0% to 5% by weight of a flame retardant additive, and

[0034] It is preferable that the inner surface of the above holes be formed in a wave shape.

[0035] In addition, the above frame is connected to a vacuum supply unit, and

[0036] The above vacuum supply unit is,

[0037] A vacuum provider that provides a vacuum according to the control of a controller, and

[0038] Vacuum lines, one end of which is connected to first grid holes formed through the first grid array and second grid holes formed through the second grid array, and the other end of which is connected to the vacuum provider,

[0039] A first vacuum sensor for measuring the first vacuum degree of the first grid holes, and

[0040] A second vacuum sensor for measuring the second vacuum degree of the second grid holes, and

[0041] A vibration sensor for measuring vibration values ​​generated in the above dry mortar layer is provided,

[0042] It is preferable that the controller provides vacuum to the first grid holes and the second grid holes using the vacuum provider so that the measured vibration value is included in a preset reference vibration value range, thereby variably controlling the measured first vacuum degree and the second vacuum degree.

[0043] In particular, the perforated sound-absorbing material may be an inorganic fiber-based sound-absorbing material comprising 70% to 85% by weight of glass fiber or rock wool, 10% to 20% by weight of a binder, and 0% to 5% by weight of a moisture-repellent agent or antibacterial agent.

[0044] In addition, the perforated sound-absorbing material may be a composite sound-absorbing material comprising 50% to 70% by weight of polyester fibers, 20% to 40% by weight of polyurethane foam, and 5% to 10% by weight of a binder or flame retardant.

[0045] The above dry mortar layer is provided with a vacuum tube that surrounds the perimeter of the heating pipe and has a vacuum formed inside.

[0046] The above vacuum tube and the above frame of the air layer are connected through a plurality of elastic line members.

[0047] Embossed protrusions are further formed on the outer surface of the above plurality of elastic line members.

[0048] In addition, the plurality of elastic line members are arranged to intersect each other.

[0049] In addition, elastic wires that are interlocked are installed in each of the first grid holes and the second grid holes.

[0050] In addition, a vibration damping layer may be disposed between the dry mortar layer and the finishing material layer.

[0051] delete

[0052] delete

[0053] Grid holes are formed in the vibration damping layer, and vibration modules that generate vibration are disposed in each of the grid holes.

[0054] Auxiliary vibration sensors are installed at the top of the above grid holes to measure vibration values ​​at the corresponding location and transmit them to the controller.

[0055] The above controller can calculate a cancellation vibration value that can cancel out the measured vibration value, and control the operation of each of the vibration modules in real time to achieve the calculated cancellation vibration value. Effects of the invention

[0056] The floor structure according to the present invention has the following effects:

[0057] The present invention improves the performance of blocking impact sound and airborne sound between upper and lower units through a structure in which a vibration-damping board layer, an air layer, a dry mortar layer, a vibration-damping mat layer, and a finishing material layer are sequentially laminated on the upper part of a slab.

[0058] In addition, the first and second spacers of the first and second double grid arrays formed within the air layer are arranged in an offset arrangement, thereby suppressing resonance phenomena for specific frequencies and dispersing noise transmission by irregularizing the path of sound waves.

[0059] In addition, multiple auxiliary air passages installed around the air layer are formed in a zigzag shape to divert the path of sound waves so that they are not transmitted directly, thereby achieving a substantial noise attenuation effect.

[0060] In addition, the porous sound-absorbing material inserted between the air layer and the dry mortar layer is composed of a composite composition of PET fibers, binder resin, and flame-retardant additives, and can provide multiple reflection and absorption effects through its wave-shaped inner surface.

[0061] In addition, by linking the vacuum supply unit with a controller to adjust the vacuum level within the air layer, sound wave transmission characteristics can be controlled in real time according to the vibration environment. As a result, vibrations generated in the dry mortar layer are maintained below a certain level, enabling high-performance active shock reduction. Brief explanation of the drawing

[0062] FIG. 1 is a drawing showing a floor structure having a floor noise prevention function for multi-family housing according to the present invention. FIG. 2 is a drawing showing an air layer in which auxiliary air passages are formed. FIG. 3 is an example of numerically comparing the floor impact sound blocking performance based on an embodiment and a comparative example of the present invention in accordance with actual floor noise test conditions (e.g., ISO 10140 or KS F 2810, etc.). FIG. 4 is a drawing showing an air layer according to the present invention. FIG. 5 is a drawing showing an example in which a perforated sound-absorbing material with internal holes is inserted between the air layer and the dry mortar layer. FIG. 6 is a drawing showing an example in which the frame of the air layer according to the present invention is connected to a vacuum supply unit. FIG. 7 is a drawing showing a case in which another example of a dry mortar layer according to the present invention is applied. FIG. 8 is a drawing showing an example in which elastic wires are installed in the first and second grid holes. FIG. 10 is a drawing showing an example in which a vibration damping layer is disposed between the dry mortar layer and the finishing material layer. Specific details for implementing the invention

[0063] Hereinafter, embodiments of the present invention are described in detail with reference to the drawings so that those skilled in the art can easily implement the present invention.

[0064] The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0065] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0066] In the following description, the statement that any configuration is provided or arranged on the "upper (or lower) surface" or the "upper (or lower) surface" of the description means that any configuration is provided or arranged in contact with the upper (or lower) surface of the description.

[0067] Furthermore, it is not limited to not including any other configuration between the above description and any configuration provided or placed on (or under) the description.

[0068] The following describes a floor structure having a floor-to-floor noise prevention function for multi-unit housing according to the present invention, with reference to the attached drawings.

[0069] FIG. 1 is a drawing showing a floor structure having a floor-to-floor noise prevention function for multi-unit housing according to the present invention. FIG. 2 is a drawing showing an air layer in which auxiliary air passages are formed.

[0070] Referring to FIG. 1, the floor structure having a floor noise prevention function for a multi-unit dwelling according to the present invention comprises a slab layer (100) made of reinforced concrete, a vibration damping board layer (200) formed on the upper part of the slab layer and having a soundproofing sheet attached to MDF or an inorganic board, an air layer (300) formed on the upper part of the vibration damping board layer (200) and formed using a plastic spacer, a dry mortar layer (400) formed on the upper part of the air layer (300) and formed of lightweight mortar or EPS mixed mortar, a heating pipe (10) embedded in the dry mortar layer (400) through which heating water flows, a vibration damping mat layer (500) formed on the upper part of the dry mortar layer (400) and made of urethane foam or rubber, and a finishing material layer (600) formed on the upper part of the vibration damping mat layer (500) and formed of reinforced flooring or PVC tile.

[0071] The thickness of the above dustproof mat layer (500) is 10 mm to 20 mm or less, the thickness of the above dry mortar layer (400) is 39 mm to 41 mm, and the height of the above air layer is 19 mm to 21 mm.

[0072] Around the air layer (300), a plurality of auxiliary air passages (350) are formed that are connected to the perimeter of the heating pipe (10) through the dry mortar layer (400).

[0073] The floor structure for multi-family housing having an inter-floor noise prevention function according to the present invention is designed to disperse and attenuate physical energy such as impact sound, airborne sound, and vibration in stages through a multi-layered structure on top of a slab, thereby exhibiting superior noise reduction performance compared to existing single-material-based floor structures.

[0074] In particular, a vibration-damping board layer, consisting of a soundproofing sheet attached to MDF or an inorganic board, is placed on top of the slab layer that forms the foundation of the structure to primarily absorb and reflect sound waves in the mid-to-low frequency range, thereby preventing the direct conduction of noise through the slab. This vibration-damping board layer serves as a foundation that blocks the vibration foundation transmission path throughout the structure.

[0075] An air layer composed of plastic spacers and an aluminum frame is formed on top of this vibration-damping board layer, and this air layer acts as the most critical buffer space within the entire structure. The air layer temporarily interrupts the propagation path of sound waves and induces a dispersion effect of resonance frequencies through the double grid arrangement (strained structure) of the spacers. In particular, as the first and second grids are arranged at different intervals and directions, resonance phenomena in specific frequency bands are suppressed, and an amorphous reflection / absorption structure is realized through multiple scattering and waveform distortion.

[0076] In addition, multiple auxiliary air passages formed around the perimeter of the air layer are connected to the dry mortar layer and linked to the air flow paths formed around the heating pipes. These air passages consist of zigzag-shaped extension pipes, which induce sound wave or vibration energy to be dispersed and bypassed in multiple stages rather than propagating directly through a single path. As a result, the complexity of acoustic paths throughout the floor layer is increased and the energy dispersion rate is improved, thereby effectively suppressing the transmission of inter-floor noise.

[0077] A dry mortar layer composed of lightweight mortar or EPS mixed mortar is installed on the upper part of this structure. This layer vertically distributes the load and simultaneously acts as a heat transfer medium to transfer heat from the heating pipes into the room. By precisely setting the thickness of the mortar layer to 39–41 mm, it is possible to achieve a balance of appropriate thermal conductivity, weight reduction, and vibration reflection reduction.

[0078] Heating pipes for hot water circulation are embedded in the dry mortar layer, and this design ensures heating performance while preventing minute vibrations of the pipes from being directly transmitted to the underlying structure through a buffer layer (air layer and vibration damping board).

[0079] In addition, a vibration damping mat layer made of urethane foam or rubber with a thickness of 10 to 20 mm is placed on top of the dry mortar layer to effectively absorb light impact sounds (walking, dropping objects, etc.) caused by the movements of actual users. By applying a material with a high elastic modulus to the mat layer, it performs absorption and damping functions for repetitive and near-high frequency vibrations, and combined with the upper finishing layer, acts as a secondary noise filter.

[0080] Finally, the top layer of finishing material, consisting of reinforced flooring or PVC tiles, maintains wear resistance and aesthetics while primarily dispersing the transmission of external impact to the entire structure, thereby suppressing energy concentration to the lower floors.

[0081] In summary, the floor structure of the present invention is composed of a multilayer structure in which each layer is functionally combined according to acoustic and mechanical properties, and by precisely setting the thickness and arrangement of each component, it is possible to comprehensively reduce light / heavy impact sound, vibration, and airborne sound. Accordingly, not only is the subjective noise perceived by actual residents reduced, but a high-performance inter-floor noise reduction effect is realized that can achieve objective inter-floor noise measurement figures (e.g., light impact sound blocking level 1 or 2).

[0082] The relative effects of the thickness and height ranges of each of the above layers are explained.

[0083] In the present invention, the thickness and height of each constituent layer are set to optimal values ​​that simultaneously consider constructability, structural safety, thermal insulation, and heating efficiency while maximizing the actual inter-layer noise reduction performance. In particular, the thickness and height ranges of the anti-vibration mat layer (10~20mm), dry mortar layer (39~41mm), and air layer (19~21mm) have the following mutually complementary effects and functional significance.

[0084] Explain the effectiveness and importance of the anti-vibration mat layer (10mm to 20mm or less).

[0085] Optimization of shock absorption can be achieved. This range provides appropriate elasticity and deformation margin to effectively absorb light impact sounds (footsteps, falling objects, etc.).

[0086] If it is less than 10mm, the sound absorption performance is reduced due to loss of elasticity, and if it exceeds 20mm, it becomes too soft, which may cause a rebound phenomenon from upper loads (furniture, human body) or cause floor level difference problems.

[0087] Construction stability can be ensured. A thickness of 20mm or less is suitable for adhesion with the mortar layer and maintaining floor balance, and can minimize sagging and compression during long-term use.

[0088] Explains the effects and importance of the dry mortar layer (39mm ~ 41mm).

[0089] It is possible to achieve a balance of load distribution and heating efficiency. A mortar thickness of approximately 40mm is the minimum cross-section that can evenly distribute floor loads (furniture, user loads) while effectively transferring heat from the internally embedded heating pipes upwards.

[0090] If it is less than 39mm, the heating pipes may be exposed or heat distribution may be uneven, and if it exceeds 41mm, the load on the entire floor may increase, placing a burden on the structure.

[0091] It can function as a mass for vibration reduction. As a high-density material, the mortar acts as a mass that contributes to blocking mid-to-low frequency vibrations, and the corresponding thickness range is suitable for forming a non-resonant state with the slab resonance frequency.

[0092] Explains the effect and importance of the air layer (19mm ~ 21mm).

[0093] It is possible to secure an acoustic non-contact space. The air layer is structured to block sound wave propagation and induce multiple reflections / scattering, and a space of at least 19 mm is required to generate meaningful resonance dispersion and porous medium effects.

[0094] In particular, around 20mm is an appropriate depth as a design standard for controlling reflection / interference characteristics of mid-low frequencies (250Hz~800Hz).

[0095] A balance can be achieved between structural stability and vibration response. If it exceeds 21mm, the structural support with the upper mortar layer is weakened, which may cause sagging or bending, and if it is less than 19mm, the air circulation and sound wave dispersion effects between spacers decrease rapidly.

[0096] Explains the importance of the mutual thickness ratio.

[0097] The three layers mentioned above have individual meanings, and at the same time, they achieve optimal performance when they are in mutually proportional balance within the overall floor structure.

[0098] The anti-vibration mat (1020mm): air layer (1921mm): mortar layer (39~41mm) is designed with a structure in a ratio of 1:2:4.

[0099] This ratio considers the balance between noise attenuation by frequency band (high / mid / low), dynamic load distribution, and structural stability, enabling the prevention of resonance, the elimination of interference through phase difference generation, and the optimization of the inter-floor noise blocking mechanism based on the mass-spring-damper model.

[0100] Figure 3 is an example of numerically comparing the inter-floor impact sound blocking performance based on an embodiment of the present invention and a comparative example, in accordance with actual inter-floor noise test conditions (e.g., ISO 10140 or KS F 2810, etc.).

[0101] The values ​​shown in Figure 3 are based on simulation or test examples, and a lower dB value indicates better noise blocking performance.

[0102] In conclusion, the structure of the present invention (Example 1) shows performance improved by more than 10 dB for both light and heavy impact sounds, and it can be confirmed that it is an optimal design that maintains a balance between the overall structural height and ease of construction.

[0103] The thickness and height ranges of each layer set in the present invention were determined by the following technical reasons.

[0104] First, the thickness of the vibration-damping mat layer is set to be between 10mm and 20mm. If the thickness is less than 10mm, it cannot sufficiently absorb high-frequency impact sounds generated from walking or falling objects; if it exceeds 20mm, floor stability may be reduced or unevenness may occur during installation due to excessive flexibility. Additionally, excessive thickness may lead to reduced bonding strength with the mortar layer and the accumulation of elastic fatigue.

[0105] The thickness of the dry mortar layer is set to be between 39mm and 41mm. This range enables the safe embedding of heating pipes while simultaneously satisfying functions such as floor load distribution, vibration reflection reduction, and heat transfer uniformity. If the thickness is less than 39mm, problems such as reduced pipe protection and load-bearing capacity may occur, and if it exceeds 41mm, problems such as increased structural load and excessive elevation of the overall floor height may occur.

[0106] The height of the air layer is set to between 19 mm and 21 mm, which is the optimal depth for effectively generating sound wave reflection and interference effects in the mid-to-low frequency band. If the height is less than 19 mm, acoustically significant air interference effects are almost non-existent, and if it exceeds 21 mm, structural support and vertical balance may be weakened.

[0107] Therefore, the numerical range set in this invention is not merely an arbitrary design, but has functionally and technically valid grounds as an optimal combination to simultaneously satisfy various physical conditions such as acoustic dynamics, heat transfer efficiency, structural stability, and ease of construction.

[0108] FIG. 4 is a drawing showing an air layer according to the present invention.

[0109] Referring to FIG. 4, the air layer (300) includes an aluminum frame (310) for forming an internal space of the air layer (300) and maintaining the shape and structural support of the air layer (300), and a plastic spacer (320) placed in the internal space of the frame (310).

[0110] The plastic spacer (320) comprises first spacers (321) forming a first grid arrangement and second spacers (322) forming a second grid arrangement offset from the first grid arrangement. The plurality of auxiliary air passages (350) are formed through extension tubes (351) formed by extending a portion of the frame (310). The extension tubes (351) may be formed in a zigzag shape.

[0111] delete

[0112] Explains the function and effects based on the internal structure of the air layer and the configuration of the auxiliary air passage.

[0113] The air layer (300) according to the present invention is an acoustic buffer space formed between the slab layer (100) and the upper structure, and is not a simple empty space but is composed of an active sound-absorbing and sound-insulating structure with a precisely designed internal structure. In particular, the air layer (300) is composed of a frame (310) formed of aluminum and a plastic spacer (320) placed inside, and through its inherent structural arrangement and extended passage system, it exerts the following functions and effects.

[0114] First, the aluminum frame (310) serves as a structural support and maintains the shape of the air layer (300), while also functioning as an outer frame that maintains a constant internal space. The frame is made of a metal material that is resistant to vibration transmission, yet its interior is hollow and non-contacted, forming a multi-scattering space in which reflection and interference of sound waves can be induced.

[0115] A plastic spacer (320) is inserted inside this frame (310). The spacer (320) consists of a first spacer layer (321) arranged in a first grid array and a second spacer layer (322) coupled to the bottom thereof and forming a second grid array in an offset shape. This double grid structure prevents sound waves from penetrating vertically or being transmitted through a single path, and forms an irregular path-based noise dispersion structure in which noise of different frequency bands interferes with each other and is attenuated.

[0116] Specifically, as the first and second grid arrangements are offset vertically, impact or vibration sounds cannot pass through the air layer in a straight line; instead, they repeatedly reflect and refract between the structures, causing energy loss and attenuation. Consequently, noise generated in the slab layer or dry mortar layer is not transmitted directly through the air layer but is scattered and absorbed by the internal structure, effectively blocking or weakening the noise transmission path.

[0117] Furthermore, the present invention further diversifies the flow paths of sound waves and vibrations by providing a plurality of auxiliary air passages around the perimeter of the air layer. These auxiliary air passages are implemented as extension tubes formed by extending a portion of the frame, and each extension tube is formed in a zigzag shape. These zigzag passages prevent sound waves from propagating rapidly in a straight path, while simultaneously inducing multiple reflections and phase interference within the passages to suppress resonance phenomena in specific frequency bands.

[0118] In addition, these passages are formed to interlock with the dry mortar layer and connect around the heating pipes, providing a path through which micro-vibrations or sound waves around the pipes that may be generated by thermal deformation can be absorbed and dissipated through the auxiliary air layer.

[0119] Consequently, the air layer of the present invention is not a simple air buffer layer, but operates as an active noise attenuation system integrating a precise grid spacer array and a complex path passage, structurally blocking the inter-floor noise transmission path and dispersing the resonance frequency to achieve a substantial noise reduction effect.

[0120] Figure 5 is a drawing showing an example in which a perforated sound-absorbing material with holes formed inside is inserted between the air layer and the dry mortar layer.

[0121] Referring to FIG. 5, a perforated sound-absorbing material (700) having holes (710) formed inside is inserted between the air layer (300) and the dry mortar layer (400).

[0122] The above perforated sound-absorbing material (700) comprises 80% to 90% by weight of polyester fibers, 5% to 15% by weight of thermoplastic binder resin, and 0% to 5% by weight of flame-retardant additives, and the inner surface of the holes is formed in a wave shape.

[0123] Explain the function and effects based on the composition and structure of perforated sound-absorbing materials.

[0124] The perforated sound-absorbing material (700) according to the present invention is a key component inserted between an air layer and a dry mortar layer within a floor structure for reducing inter-floor noise in multi-unit housing, and performs the function of absorbing sound waves and dissipating energy. The sound-absorbing material realizes multiple noise attenuation mechanisms through physical porosity (perforated structure), acoustic properties of the material composition, and the wave shape of the inner surface of the internal holes.

[0125] The perforated sound-absorbing material (700) contains 80 to 90 weight percent of polyester fibers to form a basic fiber bundle structure, which forms a porous matrix through which sound waves can pass. Polyester fibers possess excellent acoustic transmission characteristics, as well as structural stability and resilience, so sound-absorbing performance is maintained even under a compressed state for a long time. By mixing in a thermoplastic binder resin (5 to 15 weight percent), the bonding strength between individual fibers is increased, and a sheet form that is easy to install and mold can be maintained. In addition, a flame-retardant additive (0 to 5 weight percent) is designed to supplement fire resistance performance so as to meet fire safety standards.

[0126] One of the most significant features is that the inner surface of the holes (perforated structure) formed inside the sound-absorbing material is shaped like a wave. Compared to simple cylindrical perforations, this wave inner surface induces multiple reflections, refractions, and turbulent flow when sound waves pass through, thereby causing diffuse reflection and frictional loss of sound energy. This contributes to effectively attenuating resonance and transmission, particularly in the mid-to-low frequency range (approximately 250 Hz to 1000 Hz).

[0127] Furthermore, the perforated structure prevents sound waves from reciprocating and reflecting within the air layer within a certain frequency range, suppresses reverberation by inducing multipath absorption and phase interference, and reduces transmitted sound within the room. In this case, the diameter, depth, and spacing of the holes can be optimized according to the sound absorption purpose, and in particular, the inner surface of the waves extends the sound path, inducing greater friction and diffraction effects.

[0128] Perforated sound-absorbing materials act as an intermediate blocking filter layer along the noise propagation path. When inserted into an air layer, they suppress acoustic resonance in the floating space.

[0129] Consequently, the perforated sound-absorbing material of the present invention provides the following complex functional effects in terms of material, structural, and geometric aspects.

[0130] It offers wide-range frequency sound wave absorption through a porous fiber structure, improved sound absorption efficiency due to path extension and increased friction caused by the inner surface of the waves, resonance suppression through phase interference and multiple reflections, guaranteed long-term durability and safety by ensuring flame retardancy and structural stability, and the effect of suppressing inter-floor noise transmission by increasing scattering power within the air layer.

[0131] In this way, the perforated sound-absorbing material of the present invention is a precise acoustic control element that performs a function beyond simple sound absorption, and can significantly improve the inter-floor noise reduction effect of the entire floor structure.

[0132] FIG. 6 is a drawing showing an example in which the frame of the air layer according to the present invention is connected to a vacuum supply unit.

[0133] Referring to FIG. 6, the frame (310) is connected to the vacuum supply unit (800).

[0134] The vacuum supply unit comprises a vacuum supply unit (810) that provides vacuum according to the control of a controller (1000), vacuum lines (820) having one end connected to first grid holes formed through the first grid array and second grid holes formed through the second grid array, and the other end connected to the vacuum supply unit, a first vacuum sensor (830) that measures the first vacuum degree of the first grid holes, a second vacuum sensor (840) that measures the second vacuum degree of the second grid holes, and a vibration sensor (850) that measures a vibration value generated in the dry mortar layer (400).

[0135] The controller (1000) uses the vacuum provider (810) to provide vacuum to the first grid holes and the second grid holes so that the measured vibration value is included in a preset reference vibration value range, thereby variably controlling the measured first vacuum degree and the second vacuum degree.

[0136] The operation and effect of the air layer (300) structure including the vacuum supply section are explained.

[0137] The inter-floor noise prevention floor structure according to the present invention is implemented as a high-performance structure capable of flexibly responding to environmental changes and adjusting vibration damping characteristics in real time by applying active acoustic control technology linked with a vacuum supply system and a controller, going beyond a simple passive sound absorption structure.

[0138] Specifically, the aluminum frame (310) forming the air layer (300) is connected to a vacuum supply unit (800), and the vacuum supply unit (800) includes a vacuum supply device (810), vacuum lines (820), vacuum sensors (830, 840), a vibration sensor (850), and a controller (1000) that controls them integrally.

[0139] A first grid array and a second grid array are formed inside the air layer (300), and the first grid holes and the second grid holes are formed through these arrays. These grid holes are connected to a vacuum provider (810) through respective vacuum lines and are designed to selectively form a vacuum inside the air layer.

[0140] The vacuum provider (810) induces a vacuum state inside the grid hole according to the command of the controller (1000), the vacuum sensor (830, 340) (first / second) detects changes in the degree of vacuum formed in each grid hole in real time, and the vibration sensor (850) measures the vibration value generated in the upper structure (especially the dry mortar layer).

[0141] The controller (1000) variably controls the amount of vacuum provided to the first grid hole and the second grid hole so that this vibration value is included within a preset reference vibration range.

[0142] Accordingly, when the vibration value within the floor structure measured in real time by the vibration sensor (850) exceeds a reference value, the controller (1000) affects the natural frequency of the structure by adjusting the pressure state (vacuum level) within the air layer (300), thereby preventing resonance or providing the effect of absorbing vibration.

[0143] In addition, the first grid hole and the second grid hole are formed in different arrangements, and independent vacuum control is performed for each, so it is possible to locally respond only to vibrations occurring in a specific area or induce phase difference-based interference damping.

[0144] Additionally, as the vacuum level of the air layer (300) is adjusted, the internal acoustic impedance changes, thereby allowing the sound wave reflectance and absorption rate of a specific frequency band to be actively controlled. This means that, unlike a fixed sound-absorbing structure, customized noise control is possible depending on the usage environment (e.g., time of day, activity level, external noise conditions, etc.).

[0145] Generally, heavy impact sound has low-frequency characteristics and a high probability of resonance. The present invention can overcome the limitations of existing passive vibration damping structures by performing functions such as preventing resonance in the corresponding frequency band and minimizing impact transfer through vacuum control.

[0146] The vacuum supply method regulates only the internal air conditions without altering the structure itself, enabling high-efficiency control without compromising structural durability. Furthermore, since the vacuum is maintained after a certain period, energy consumption is minimized.

[0147] Accordingly, the present invention goes beyond the purpose of simple sound blocking and implements a floor structure that implements a series of feedback loop-based active noise control systems leading from vibration detection to real-time vacuum control to acoustic response characteristic control; as such, it has great value as a technical alternative for solving inter-floor noise problems in the future.

[0148] Such systems can be applied as precision noise management solutions at the individual household level in particularly sensitive environments (e.g., luxury apartments, hotels, hospitals, senior housing, etc.), and can also be developed as a core element of intelligent building structures (IoT-based smart floor systems).

[0149] In particular, although not illustrated in the drawings, the perforated sound-absorbing material according to the present invention may be an inorganic fiber-based sound-absorbing material comprising 70% to 85% by weight of glass fiber or rock wool, 10% to 20% by weight of a binder, and 0% to 5% by weight of a moisture-repellent agent or an antibacterial agent.

[0150] Explain the function and effects of inorganic fiber-based porous sound-absorbing materials.

[0151] In addition to polyester fiber-based materials, the perforated sound-absorbing material of the present invention may alternatively utilize inorganic fiber-based materials. In this case, the perforated sound-absorbing material is composed of a structure comprising glass wool or mineral wool, or rock wool, as the main component. Specifically, by including glass wool or mineral wool in a range of 70% to 85% by weight, a binder in a range of 10% to 20% by weight, and a moisture-repellent or antibacterial agent in a range of 0% to 5% by weight, the following functional actions and technical effects can be realized.

[0152] Glass fiber and rock wool are inorganic fibers with high strength and a fine porous structure that absorb sound energy by converting it into heat through friction and viscous resistance between the fibers as sound waves penetrate the material. In particular, since these materials have a high absorption rate in the mid-to-low frequency range (125–1000 Hz), they are effective in blocking heavy impact sounds (such as footsteps and furniture movement) among inter-floor noises.

[0153] Inorganic fibers are resistant to heat and possess high shape stability, so deformation, shrinkage, and subsidence rarely occur even after prolonged use, and they maintain their structure without burning in the event of a fire. Consequently, there is no concern about performance degradation due to heat even when placed beneath a dry mortar layer, and they can be safely applied even in thermal environments surrounding floor heating pipes.

[0154] The sound-absorbing material has multiple pores, and the inner surface of the pores can be formed in a wave shape as needed. When sound waves pass through, this structure induces multiple reflections and interference within the pores, disperses acoustic energy, and maximizes sound absorption performance by interacting with the internal fiber structure of the material.

[0155] By including a small amount (0 to 5 weight%) of a moisture-repellent or antibacterial agent in the constituent materials, problems such as reduced sound absorption performance, mold growth, and odor generation caused by moisture accumulation or condensation inside the floor are prevented.

[0156] Rock wool and fiberglass are non-combustible materials that do not generate toxic gases in the event of a fire and exhibit excellent fire spread prevention performance due to the absence of combustion expansion. Furthermore, the inclusion of appropriate binders can induce effects such as preventing scattering and suppressing aerosolization, which can enhance safety regarding human contact and indoor air quality.

[0157] If the above composition ratio is deviated from, the following technical problems and functional degradation may occur.

[0158] In the case where the proportion of glass fiber or rock wool is less than 70% by weight or more than 85% by weight, if it is less than 70% by weight, the proportion of the inorganic fibers that are the base material is insufficient, so the porous structure of the sound-absorbing material itself becomes loose and the sound absorption rate decreases rapidly. In addition, thermal resistance and fire resistance performance are weakened, and the strength and resilience of the material are also reduced.

[0159] If the content exceeds 85 weight percent, the proportion of the binder becomes insufficient, resulting in reduced bonding strength between fibers and decreased structural stability; consequently, problems such as detachment, pulverization, and scattering may occur during long-term use. In particular, deformation and separation phenomena increase during construction.

[0160] In the case where the ratio of the binder is less than 10% by weight or more than 20% by weight, if it is less than 10% by weight, the bonding between fibers is insufficient and they cannot be integrated into a sheet form, resulting in reduced mechanical stability and durability. It is susceptible to vibration or compression, and the material may detach due to repeated impact.

[0161] In the case of exceeding 20 weight percent, if the amount of binder becomes excessive, it excessively coats the surface of the fibers, closing the porous structure and preventing sound waves from penetrating inside, causing a rapid decrease in sound absorption rate. In other words, the essential function of the sound-absorbing material is compromised.

[0162] In the case where the proportion of a moisture barrier or antimicrobial agent exceeds 5% by weight, if the functional additive is excessive, the moisture barrier or antimicrobial agent may block pores within the material or react with the binder, causing deterioration of physical properties and volatility issues. Furthermore, some antimicrobial agents may be harmful to the human body and the environment at high concentrations, and there is a risk of exceeding safety standards.

[0163] In addition, the perforated sound-absorbing material may be a composite sound-absorbing material comprising 50% to 70% by weight of polyester fibers, 20% to 40% by weight of polyurethane foam, and 5% to 10% by weight of a binder or flame retardant.

[0164] The porous sound-absorbing material according to the present invention can be implemented in a composite form of polyester fibers and polyurethane foam, in addition to being an inorganic fiber-based or single polyester fiber-based sound-absorbing material, thereby enabling hybrid sound absorption performance capable of responding to multiple frequency bands.

[0165] This composite porous sound-absorbing material is formed with a composition comprising 50% to 70% by weight of polyester fibers, 20% to 40% by weight of polyurethane foam, and 5% to 10% by weight of a binder or flame retardant, and provides the following technical functions and effects.

[0166] It is possible to realize broadband performance capable of sound absorption from high to mid-low frequencies,

[0167] Polyester fibers (50–70 wt%) form a porous fiber structure capable of effectively absorbing sound waves in the high-frequency range (above 1000 Hz), and reduce high-frequency reflected sound due to their large surface area and high air permeability.

[0168] Polyurethane foam (20–40 wt%) contains microbubbles and cell structures within its foam structure, effectively damping vibration energy in the mid-to-low frequency range (250–800 Hz). In particular, it exhibits excellent absorption performance for impact vibration (heavyweight impact sound).

[0169] The combination of these two materials provides a wide absorption frequency range and a complex damping capability capable of responding to multiple impact conditions.

[0170] Composite shock absorption is possible. Polyurethane foam is a highly elastic material that maintains excellent resilience and energy absorption characteristics even under repeated external impacts.

[0171] Accordingly, the material acts as a physical cushion against repeated walking impacts or falling objects on the floor structure, thereby improving the impact sound reduction performance of the entire structure.

[0172] By being combined with a polyester fiber layer, a multi-stage damping action of primary impact dispersion (foam) → secondary sound absorption (fiber layer) is realized.

[0173] It has excellent shape stability and adaptability for construction. Although polyurethane foam is included in the material, polyester fibers make up 50 to 70 weight percent of the main material, so the processability, cutability, flexibility, and ease of construction of the entire material are maintained.

[0174] It can be adapted to high-temperature bonding or compression molding processes, and enables long-term shape stability and prevention of structural extrusion after construction.

[0175] Heat resistance stability and safety can be ensured through the inclusion of binders or flame retardants. The binders or flame retardants (5–10 wt%) enhance the structural bonding strength within the material while simultaneously providing functions to suppress combustion spread and prevent the release of toxic gases in the event of a fire. This allows the material to satisfy building standards (flame retardant performance, environmental safety standards, etc.) required for sound-absorbing materials inserted into floors.

[0176] FIG. 7 is a drawing showing a case where another example of a dry mortar layer according to the present invention is applied.

[0177] Referring to FIG. 7, the dry mortar layer (400) is provided with a vacuum tube (510) that surrounds the heating pipe (10) and has a vacuum formed inside.

[0178] The above vacuum tube (510) and the frame (310) of the air layer (300) are connected through a plurality of elastic line members (520).

[0179] Embossed protrusions (not shown) are further formed on the outer surface of the plurality of elastic line members (520).

[0180] In addition, the plurality of elastic line members (520) are arranged to intersect each other.

[0181] Explains the operation and effects of vacuum tube and elastic line connection structures.

[0182] The dry mortar layer (400) of the present invention is provided with a vacuum tube (510) that surrounds a heating pipe (10), which is a core component of a floor heating system. This vacuum tube (510) is configured in the form of a sealed tube with a certain level of vacuum formed inside, and acts as a structure that exerts complex physical effects on the heat transfer and vibration propagation path around the pipe.

[0183] Additionally, the vacuum tube (510) is connected to the aluminum frame (310) of the air layer (300) through a plurality of elastic line members (520). These elastic line members (520) function as a type of vibration damping mechanism, and embossed projections are formed on their outer surfaces. By arranging the entire set of members to intersect each other, the following complex actions and effects are realized.

[0184] It is possible to block and absorb vibrations of the heating pipes. The heating pipes (10) may cause fine mechanical vibrations or water hammer (water pressure impact sound) due to the circulation, expansion and contraction of the heating water, and changes in flow velocity, and this can spread throughout the mortar layer and be transmitted through the substructure.

[0185] The vacuum tube (510) completely surrounds the pipe, blocking direct contact, and removes the medium for propagating sound and vibration energy through the internal vacuum space, thereby inducing transmission loss.

[0186] Accordingly, the source of vibration noise caused by piping is blocked.

[0187] It can serve as a vibration damping link between the air layer (300) and the dry mortar layer (400). Since the vacuum tube (510) is not directly connected to the frame (310) of the air layer (300) but is indirectly connected through a plurality of elastic line members (520), when structural vibrations of the dry mortar layer (400) are transmitted to the air layer, the energy is not transmitted linearly but is dispersed.

[0188] The elastic line member (520) is made of a highly elastic material and performs damping action against repeated vertical or lateral impacts.

[0189] It is possible to increase friction and induce a phase difference through embossed protrusions. The embossed protrusions formed on the outer surface of the elastic line member (520) increase the surface area during the vibration response of the line member and induce fine contact and friction with adjacent materials (frame, vacuum tube, etc.), thereby converting and absorbing a portion of the vibration energy into frictional heat.

[0190] In particular, the embossed pattern induces non-uniform response characteristics (non-linear phase difference) during the transmission of vibration waveforms, thereby enhancing resonance prevention and energy dispersion effects in specific frequency bands.

[0191] A multi-directional damping mechanism can be formed through cross arrangement. By arranging multiple elastic line members (520) to intersect each other, a multi-directional response mechanism is activated for complex vibrations in the vertical, horizontal, and torsional directions.

[0192] This can handle a much wider vibration band compared to uniaxial or unidirectional buffering structures and is very effective for dispersing shock energy and detuning natural frequencies.

[0193] Figure 8 is a drawing showing an example in which elastic wires are installed in the first and second grid holes.

[0194] Referring to FIG. 8, elastic wires (3) that are connected in an alternating manner are installed in each of the first grid holes (1) and the second grid holes (2).

[0195] The operation and effect of the elastic wire (3) installed alternately between the first and second grid holes (1, 2) will be explained.

[0196] The interlayer noise prevention structure according to the present invention includes a first grid array and a second grid array disposed within an air layer, and a plurality of grid holes (1, 2) are formed in each array. Elastic wires (3) connected in an alternating manner are installed in each of these grid holes, and these wires form an active damping path that controls the flow and response of vibrations within the structure.

[0197] The irregular shape of the vibration path and energy dispersion are possible. Since the elastic wires (3) are connected in an alternating manner rather than in a one-to-one correspondence, vibrations or sound waves do not travel through the grid holes (1, 2) in a vertical or single path, but are transmitted along an asymmetric and non-linear path.

[0198] From an acoustic perspective, this induces phase difference, interference, and scattering, and vibrational energy is attenuated by being dispersed through multiple paths rather than being concentrated on a specific path.

[0199] As a result, the possibility of resonance frequency occurrence is reduced, and vibration amplification in specific frequency bands is prevented.

[0200] It is possible to provide shock absorption and resilience based on the spring-damper effect.

[0201] The elastic wire (3) is made of a material having constant tensile strength and restoring strength (e.g., steel spring, high-elasticity synthetic fiber, etc.), and when vibration occurs, it stretches like a spring and then restores itself to absorb shock.

[0202] In particular, when arranged in an alternating pattern, the directionality of the vibration is twisted and a rotational component is imparted, so the vibration damping rate is higher and the response time is faster compared to a linear structure.

[0203] Self-recovery operates even against repetitive vibrations, contributing to the maintenance of structural stability.

[0204] It is possible to strengthen connectivity between grid arrays and prevent vibration integration.

[0205] The first grid hole (1) and the second grid hole (2) are configured in different arrangements (e.g., vertical and diagonal), and by connecting them in an alternating manner with a wire (3), they operate as an interlocking damping system while maintaining discontinuity and structural independence between the two grid layers.

[0206] Even if vibration is concentrated in one grid hole (1,2), some energy is transferred to the relative grid layer through the wire, preventing localized vibration concentration and inducing a dispersion reduction effect.

[0207] There is potential for integration with active control systems. The elastic wire structure can be integrated with a vacuum provider and a controller to develop into a structure capable of adjusting the elastic modulus or tension under specific conditions (vibration amount, noise level, etc.).

[0208] Figure 10 is a drawing showing an example in which a vibration damping layer is placed between a dry mortar layer and a finishing material layer.

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[0226] Referring to FIG. 10, a vibration damping layer (900) may be disposed between the dry mortar layer (400) and the finishing layer (600).

[0227] Grid holes (910) are formed in the vibration damping layer (900), and vibration modules (920) that generate vibration are disposed in each of the grid holes (910).

[0228] At the top of the above grid holes (910), auxiliary vibration sensors (930) are installed to measure vibration values ​​at the corresponding location and transmit them to the controller (1000).

[0229] The above controller (1000) can calculate a cancellation vibration value that can cancel out the measured vibration value, and control the operation of each of the vibration modules in real time to achieve the calculated cancellation vibration value.

[0230] Explain the operation and effects of the vibration damping layer and the active vibration module.

[0231] The floor structure for preventing inter-floor noise in multi-unit housing according to the present invention may additionally have a vibration damping layer disposed between a dry mortar layer and a finishing material layer, and this vibration damping layer is composed of an active control type vibration cancellation system rather than a simple passive sound insulation structure.

[0232] Specifically, a plurality of grid holes are formed in a grid array within the vibration damping layer, and a small-scale vibration module is installed in each grid hole. This vibration module is composed of an actuator capable of generating its own vibration (e.g., a piezoelectric element, a magnetic speaker, a micro motor, etc.), and an auxiliary vibration sensor is mounted on the top of the module to measure real-time vibration values ​​occurring at that location.

[0233] This auxiliary vibration sensor transmits vibration data at the grid-hole level to the controller, which analyzes the data to calculate cancellation vibration values ​​in real time and precisely controls the operation of each vibration module. By injecting anti-phase vibrations across the entire floor structure, it forms an active cancellation structure that attenuates inter-floor noise in real time.

[0234] Inter-floor noise can be eliminated through real-time active cancellation control.

[0235] Based on the actual vibration values ​​(amplitude, frequency, phase, etc.) collected from each grid Hall unit, the controller calculates a canceling vibration value with the same amplitude and opposite phase as the corresponding vibration.

[0236] By driving each vibration module based on the corresponding value to generate destructive interference in real time, upper impact sounds or vibrations can be blocked at the source before being transmitted to the lower structure.

[0237] This design directly applies the principles of Active Noise Control (ANC) to the floor structure, providing a substantial blocking effect against irregular and high-energy impact noises that are difficult to handle with traditional passive floor structures.

[0238] It is possible to implement an intelligent multi-point detection and control structure.

[0239] Sensors and vibration modules are distributed across the vibration damping layer through a grid hole array, allowing for finely separated detection of vibration responses by location.

[0240] As a result, each vibration module autonomously responds to various impact situations, such as local vibrations occurring at a single point (e.g., falling an object) or distributed vibrations over a wide area (e.g., walking, rolling), providing high adaptability.

[0241] It has fast responsiveness to high frequency and high speed shocks.

[0242] The connection between the sensor, controller, and module is established via a real-time communication structure (wired or wireless), and since canceling vibrations are injected with a response speed in the millisecond range, it can effectively respond to rapidly repeating impact sounds, high-speed walking vibrations, and unintended foot stomping.

[0243] It is possible to achieve low-latency, high-response vibration cancellation control that is difficult to handle with conventional passive vibration isolation structures.

[0244] Intelligent optimization functions and energy efficiency can be secured.

[0245] The controller can periodically learn and optimize cancellation vibration values ​​through stored algorithms or AI-based vibration pattern analysis models, and switches to automatic power-saving mode when inactive to reduce unnecessary energy consumption.

[0246] Accordingly, energy efficiency can be secured along with customized vibration control in response to changes in the usage environment.

[0247] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0248] 100: Slab layer 200: Vibration isolation board layer 300: Air layer 310: Frame 320: Plastic spacer 321: First spacer layer 322: Second spacer layer 350: Auxiliary air passage 351: Extension tube 400: Dry mortar layer 500: Vibration isolation mat layer 510: Vacuum tube 520: Elastic line member 600: Finishing material layer 700: Perforated sound-absorbing material 710: Hole 800: Vacuum supply unit 810: Vacuum supply device 820: Vacuum line 830: First vacuum sensor 840: Second vacuum sensor 850: Vibration sensor 900: Vibration damping layer 910: Grid hole 920: Vibration module 930: Auxiliary vibration sensor 1000: Controller 1: First grid hole 2: Second grid hole 3: Elastic wire 10: Heating pipe

Claims

Claim 1 In a floor structure having a function to prevent inter-floor noise for multi-unit housing, the floor structure comprises a slab layer made of reinforced concrete; a vibration-damping board layer formed on the upper part of the slab layer, wherein a soundproofing sheet is attached to MDF or an inorganic board; an air layer formed on the upper part of the vibration-damping board layer using a plastic spacer; a dry mortar layer formed on the upper part of the air layer, wherein the dry mortar layer is formed using lightweight mortar or EPS mixed mortar; a heating pipe embedded in the dry mortar layer through which heating water flows; a vibration-damping mat layer formed on the upper part of the dry mortar layer, wherein the thickness of the vibration-damping mat layer is 10mm to 20mm or less, the thickness of the dry mortar layer is 39mm to 41mm, the height of the air layer is 19mm to 21mm, and on the outer part of the air layer, the A floor structure having a soundproofing function for inter-floor noise in multi-unit housing, characterized by having a plurality of auxiliary air passages formed to communicate with the perimeter of the heating pipe through a dry mortar layer. Claim 2 A floor structure having a floor-to-floor noise prevention function for multi-unit housing, characterized in that, in claim 1, the air layer comprises a frame formed of aluminum for forming an internal space of the air layer and maintaining the shape and structurally supporting the air layer, and a plastic spacer disposed in the internal space of the frame, wherein the plastic spacer comprises first spacers forming a first grid arrangement and second spacers forming a second grid arrangement offset from the first grid arrangement, and the plurality of auxiliary air passages are formed by extension tubes provided on the outer part of the air layer, and the extension tubes are formed to communicate with the frame. Claim 3 ◈Claim 3 was abandoned upon payment of the registration fee.◈ A floor structure having an inter-floor noise prevention function for multi-unit housing, characterized in that, in Claim 2, a perforated sound-absorbing material having internal holes is inserted between the air layer and the dry mortar layer, and the perforated sound-absorbing material comprises 80% to 90% by weight of polyester fibers, 5% to 15% by weight of thermoplastic binder resin, and 0% to 5% by weight of flame-retardant additives, and the inner surface of the holes is formed in a wave shape. Claim 4 ◈Claim 4 was abandoned upon payment of the registration fee.◈ In Claim 3, the frame is connected to a vacuum supply unit, and the vacuum supply unit comprises a vacuum supply unit that provides vacuum according to the control of a controller, vacuum lines having one end connected to first grid holes formed through the first grid array and second grid holes formed through the second grid array, and the other end connected to the vacuum supply unit, a first vacuum sensor that measures a first vacuum degree of the first grid holes, a second vacuum sensor that measures a second vacuum degree of the second grid holes, and a vibration sensor that measures a vibration value generated in the dry mortar layer, wherein the controller provides vacuum to the first grid holes and the second grid holes using the vacuum supply unit so that the measured vibration value is included in a preset reference vibration value range, thereby variably controlling the measured first vacuum degree and the second vacuum degree, for multi-unit housing. Floor structure having inter-floor noise prevention function.

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