Sound absorption and insulation composite ceiling board and house ceiling

Abstract

The utility model discloses a sound absorption and insulation composite ceiling board and a house ceiling, and belongs to the technical field of house construction. The sound absorption and insulation composite ceiling board comprises a gypsum board on the top layer; a microporous ceramic plate on the bottom layer; the melamine cotton board is arranged between the gypsum board and the microporous ceramic board; supporting strips are fixedly arranged on the bottom face of the gypsum board at intervals, the bottom ends of the supporting strips are connected with the top face of the microporous ceramic board, and the melamine cotton boards are arranged between the adjacent supporting strips. The utility model further provides a house suspended ceiling. The house suspended ceiling comprises a suspender device connected with a floor slab and a sound absorption and insulation composite suspended ceiling plate arranged below the suspender device. The sound absorption and insulation composite ceiling board has the advantages of being good in sound absorption and insulation effect, stable in connecting structure, environmentally friendly and free of pollution, and in addition, a house ceiling has the advantage of being convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a sound-absorbing and sound-insulating composite ceiling panel and a ceiling for a house. Background Technology

[0002] Ceiling installation is a common element in home decoration and plays a significant role in interior design. It not only beautifies the ceiling surface with different colors, patterns, and designs but also enhances the sound insulation of the floor slab. However, existing ceiling panels used in home decoration have relatively simple structures to reduce production costs, resulting in limited sound insulation performance. Noise from upper-floor residents can be transmitted through the ceiling slab into the rooms, affecting the indoor acoustic environment and quality of life. Therefore, current home ceiling installations still have shortcomings, and for residences with higher sound insulation requirements, the sound insulation effect needs further improvement.

[0003] In traditional residential ceilings, gypsum board is widely used due to its lightweight, high strength, thinness, ease of processing, low cost, and fire resistance. To further improve sound insulation, inexpensive and sound-absorbing materials such as rock wool are often used to fill the cavities in gypsum board ceilings. However, over time, rock wool is prone to collapse and moisture absorption, affecting the overall sound insulation performance of the ceiling. Furthermore, fibers shed from rock wool and other sound-absorbing materials can easily adhere to the human body or be inhaled, causing discomfort and related illnesses. In addition, traditional ceilings primarily improve the sound environment by enhancing the sound insulation performance of the floor slab, without specifically optimizing other acoustic parameters of the space beneath the floor, such as reverberation time.

[0004] Therefore, ceiling panels with excellent sound absorption and insulation effects and made of green and environmentally friendly materials have become urgently needed. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a sound-absorbing and sound-insulating composite ceiling panel and a house ceiling, which has excellent sound absorption and sound insulation properties, and is also environmentally friendly and pollution-free.

[0006] This utility model provides a sound-absorbing and sound-insulating composite ceiling panel, comprising: a top gypsum board; a bottom microporous ceramic board; and a melamine cotton board disposed between the gypsum board and the microporous ceramic board; the bottom surface of the gypsum board is fixedly provided with support strips at intervals, the bottom end of the support strips is connected to the top surface of the microporous ceramic board, and the melamine cotton board is disposed between adjacent support strips.

[0007] According to the aforementioned sound-absorbing and sound-insulating composite ceiling panel, the top surface of the microporous ceramic board is connected to the bottom surface of the melamine cotton board, the melamine cotton board and the gypsum board are spaced apart, and the gypsum board, melamine cotton board and support strip together form a cavity.

[0008] Alternatively, the bottom surface of the gypsum board is connected to the top surface of the melamine cotton board, and the melamine cotton board and the microporous ceramic board are spaced apart, with the microporous ceramic board, melamine cotton board and support strip forming a cavity.

[0009] Alternatively, melamine cotton boards are alternately arranged with gypsum boards and microporous ceramic boards, with the gypsum boards, melamine cotton boards, and support strips forming an upper cavity, and the microporous ceramic boards, melamine cotton boards, and support strips forming a lower cavity.

[0010] Furthermore, the total thickness of the cavity ranges from 2 to 4 mm.

[0011] According to the aforementioned sound-absorbing and sound-insulating composite ceiling panel, the support strip is made of the same material as gypsum board or microporous ceramic board.

[0012] The aforementioned sound-absorbing and sound-insulating composite ceiling panel has a thickness of 30~40mm.

[0013] This utility model also provides a ceiling system for a house, including a suspension rod device connected to the floor slab and a sound-absorbing and sound-insulating composite ceiling panel installed under the suspension rod device.

[0014] According to the aforementioned ceiling, the suspension rod device includes an expansion bolt installed at the top of the floor slab, a suspension rod connected to the end of the expansion bolt away from the floor slab, a plurality of spaced load-bearing keels connected to the end of the suspension rod away from the expansion bolt, and a plurality of spaced cross bracing keels fixedly connected to the bottom of the load-bearing keel.

[0015] The load-bearing keel and the cross bracing keel are set perpendicular to each other, and the bottom surface of the cross bracing keel is connected to the top surface of the sound-absorbing and sound-insulating composite ceiling panel.

[0016] Furthermore, the supporting keel includes a top plate, and the top plate has first side plates at both ends in the width direction, and the first side plates have through slots.

[0017] The cross bracing keel includes a bottom plate, and second side plates are provided at both ends of the bottom plate in the width direction. The end of the second side plate away from the bottom plate is provided with an inward straight folded edge.

[0018] When the bottom of the cross brace is fixed to the support keel, the straight edge of the cross brace is engaged in the slot.

[0019] Furthermore, the hanger rod is a threaded rod; the top plate of the supporting keel has multiple round holes distributed along its length, and the end of the hanger rod away from the expansion bolt passes through the round holes. Adjusting nuts are respectively fitted on the upper and lower sides of the top plate of the hanger rod; elastic damping pads are respectively set between the two adjusting nuts and the top plate of the supporting keel; by rotating the upper and lower adjusting nuts, the supporting keel moves up and down along the hanger rod; by locking the upper and lower adjusting nuts, the supporting keel is fixed in position on the hanger rod.

[0020] Furthermore, the distance between the floor slab and the top surface of the gypsum board of the sound-absorbing and sound-insulating composite ceiling panel is 70~80mm.

[0021] This utility model has the following beneficial effects:

[0022] (1) Compared with traditional gypsum board ceilings, which use gypsum board material with almost no sound absorption effect as the main ceiling panel, this utility model uses melamine cotton and microporous ceramic material with good sound absorption effect as the main sound absorption and noise reduction structure in the lower part, forming a three-layer sound absorption and sound insulation composite ceiling panel with "hard-soft-hard" structure. It has a good sound insulation effect, which can block the noise transmitted from the upper floor and reduce the impact of external noise on the residents' lives; and because of the porous structure of microporous ceramic board and melamine cotton board, it has a good sound absorption effect, which reduces the multiple reflections of sound in the lower residential space.

[0023] (2) The support strip is used to add melamine cotton board between the gypsum board and the microporous ceramic board and form a cavity to play a stabilizing role; at the same time, the support strip serves as the fixed base for the microporous ceramic board.

[0024] (3) The melamine cotton board and microporous ceramic board used in the sound-absorbing and sound-insulating composite ceiling board are green, environmentally friendly and harmless materials that have passed various tests and certifications and have no negative impact on the health of residents;

[0025] (4) The ceiling of this utility model has better sound absorption and sound insulation effects; the ceiling panel connection structure is stable; and it has a low impact on the floor height. The overall structural thickness does not exceed 110mm, providing residents with a more comfortable and quiet living environment. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of a sound-absorbing and sound-insulating composite ceiling panel;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 This is a structural schematic diagram of another sound-absorbing and sound-insulating composite ceiling panel;

[0029] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0030] Figure 5 This is a structural diagram of a suspended ceiling.

[0031] Figure 6 A three-dimensional view of the boom assembly;

[0032] Figure 7 This is a front view of the boom assembly;

[0033] Figure 8 for Figure 7 A magnified view of a section at point C;

[0034] Figure 9 This is a side view of the boom assembly;

[0035] Figure 10 for Figure 9 A magnified view of a section at point D;

[0036] Figure 11 A three-dimensional diagram of the structure supporting the keel;

[0037] Figure 12 This is a 3D diagram of the horizontal bracing keel.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Sound-absorbing and sound-insulating composite ceiling panel; 1. Gypsum board; 2. Microporous ceramic board; 3. Melamine cotton board; 4. Support strip; 5. Cavity; 6. Floor slab; 7. Hanging rod device; 8. Expansion bolt; 9. Hanging rod; 10. Load-bearing keel; 1001. Top plate; 1002. First side plate; 1003. Slot; 1004. Round hole; 11. Horizontal bracing keel; 1101. Bottom plate; 1102. Second side plate; 1103. Straight edge; 12. Adjusting nut; 13. Elastic vibration damping pad. Detailed Implementation

[0040] To make the technical problems, technical solutions and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Melamine cotton board is a porous, lightweight sound-absorbing material made primarily from melamine resin through a foaming process. It features lightweight construction; fire resistance up to B1 level; environmentally friendly raw materials, free of adhesives; easy bending, cutting, and installation; high cleanliness, with no airborne particles; and excellent sound absorption, making it suitable for use as sound-absorbing filling in walls. To enhance the fire resistance of melamine cotton board, a silicon-based modification process is applied, resulting in melamine cotton meeting Class A fire resistance standards.

[0042] Microporous ceramic panels are made using the principle of mass springs. Both sides are made of hard cement, with the core consisting of micro-ceramic particles with abundant pores, polymerized using inorganic salt binders to form a "hard-soft-hard" structure. The ceramic particles, fired at over 1100 degrees Celsius, possess excellent properties such as low density, high strength, and numerous micropores. Panels made from these particles are lightweight, sound-absorbing, crack-resistant, waterproof, and corrosion-resistant, meeting green and environmentally friendly requirements. As a completely inorganic material, microporous ceramic panels naturally possess properties such as non-combustibility, weather resistance, acid and alkali resistance, water resistance, sunlight resistance, and are environmentally friendly and odorless, making them ideal for sound absorption in building interiors.

[0043] The traditional gypsum board ceiling process requires a new type of environmentally friendly acoustic material. Based on this, the embodiments of this utility model combine the above two materials with traditional gypsum board to create a new type of sound-absorbing and sound-insulating composite ceiling panel.

[0044] An embodiment of this utility model provides a sound-absorbing and sound-insulating composite ceiling panel 100, the structure of which is as follows: Figures 1 to 4 As shown. The sound-absorbing and sound-insulating composite ceiling panel 100 includes a top gypsum board 1, a bottom microporous ceramic board 2, and a melamine cotton board 3 between the gypsum board 1 and the microporous ceramic board 2; the bottom surface of the gypsum board 1 is fixedly provided with support strips 4 at intervals, the bottom end of the support strips 4 is connected to the top surface of the microporous ceramic board 2, and the melamine cotton board 3 is arranged between adjacent support strips 4.

[0045] Support strip 4 is fixed to gypsum board 1 with self-tapping screws, melamine cotton board 3 is fixed to gypsum board 1 with self-tapping screws, and microporous ceramic board 2 is fixed to support strip 4 with self-tapping screws. High-strength adhesive can also be used to fix the melamine cotton board, reducing the use of self-tapping screws and improving construction and installation efficiency.

[0046] The position of the melamine cotton board 3 between the gypsum board 1 and the microporous ceramic board 2 can include the following three situations: The first situation is that the top surface of the microporous ceramic board 2 is in contact with the bottom surface of the melamine cotton board 3, the melamine cotton board 3 and the gypsum board 1 are spaced apart, and the gypsum board 1, the melamine cotton board 3, and the support strip 4 together form a cavity 5. Figure 1 and Figure 2 As shown. The second scenario is: the bottom surface of gypsum board 1 is connected to the top surface of melamine cotton board 3; melamine cotton board 3 and microporous ceramic board 2 are spaced apart; the microporous ceramic board 2, melamine cotton board 3, and support strip 4 together form a cavity 5, as shown. Figure 3 and Figure 4 As shown. The third case is: melamine cotton board 3 is set apart from gypsum board 1 and microporous ceramic board 2, respectively. Gypsum board 1, melamine cotton board 3 and support strip 4 together form the upper cavity 5, and microporous ceramic board 2, melamine cotton board 3 and support strip 4 together form the lower cavity 5.

[0047] Specifically, the total thickness of cavity 5 ranges from 2 to 4 mm.

[0048] Specifically, the support strip 4 is made of the same material as gypsum board 1 or microporous ceramic board 2.

[0049] The thickness of the sound-absorbing and sound-insulating composite ceiling panel 100 is 30~40mm. While improving sound absorption and insulation effects, the overall thickness of the sound-absorbing and sound-insulating composite ceiling panel 100 is relatively small, so it will not significantly affect the floor height.

[0050] The support strip 4 serves to stabilize the melamine cotton board 3 formed between the gypsum board 1 and the microporous ceramic board 2, creating a cavity 5; at the same time, the support strip 4 acts as a fixed base for the microporous ceramic board 2.

[0051] The cavity 5 ensures that the melamine cotton board 3 is not completely filled and compacted within the space formed by the support components, thus avoiding any impact on acoustic performance. Simultaneously, the combination of the cavity 5 and the melamine cotton board 3 also provides a certain level of sound absorption performance. That is, by reducing the thickness of the melamine cotton board 3, the sound absorption and sound insulation effect is not significantly affected, and the cost of the sound-absorbing and sound-insulating composite ceiling panel 100 can be reduced.

[0052] Compared to traditional gypsum board ceilings, which use gypsum board with weak sound absorption as the main panel, this invention uses melamine cotton and microporous ceramic material with good sound absorption as the main sound-absorbing and noise-reducing structure at the bottom, forming a three-layer sound-absorbing and sound-insulating composite ceiling panel with a "hard-soft-hard" structure. This not only has a good sound insulation effect, blocking noise transmitted from upstairs and reducing the impact of external noise on residents' lives, but also, due to the porous structure of the microporous ceramic board and melamine cotton board, has a good sound absorption effect, reducing multiple reflections of sound in the lower living space.

[0053] The overall structure of the sound-absorbing and sound-insulating composite ceiling panel enhances the living comfort of residents. The melamine cotton board and microporous ceramic board used are both green, environmentally friendly, and harmless materials that have passed various parameter certifications and pose no harm to the health of residents.

[0054] An embodiment of this utility model also provides a suspended ceiling, which includes a suspension rod device 7 connected to a floor slab 6 and a sound-absorbing and sound-insulating composite ceiling panel 100 disposed below the suspension rod device 7, such as... Figure 5 As shown.

[0055] The suspension rod device 7 includes an expansion bolt 8 set at the top of the floor slab 6, a suspension rod 9 connected to the end of the expansion bolt 8 away from the floor slab 6, a plurality of spaced load-bearing keels 10 connected to the end of the suspension rod 9 away from the expansion bolt 8, and a plurality of spaced cross bracing keels 11 fixedly connected to the bottom of the load-bearing keel 10. The load-bearing keels 10 and the cross bracing keels 11 are arranged perpendicular to each other, and the bottom surface of the cross bracing keels 11 is connected to the top surface of the sound-absorbing and sound-insulating composite ceiling panel 100. Figure 6 As shown.

[0056] Furthermore, the structure supporting the keel 10 is as follows: Figure 11 As shown, the supporting keel 10 includes a top plate 1001, and first side plates 1002 are provided at both ends of the top plate 1001 in the width direction. The first side plates 1002 have through slots 1003. The top plate 1001 and the first side plates 1002 can be a separate connection structure or an integrally formed structure. The structure of the cross brace keel 11 is as follows... Figure 12As shown, the cross brace 11 includes a bottom plate 1101. Second side plates 1102 are provided at both ends of the bottom plate 1101 in the width direction. An inwardly oriented straight edge 1103 is provided at the end of the second side plate 1102 away from the bottom plate 1101. The bottom plate 1101, the second side plates 1102, and the straight edge 1103 can be a separate connection structure or an integrally formed structure. When the cross brace 11 is fixed to the bottom of the supporting keel 10, the straight edge 1103 of the cross brace 11 is engaged in the slot 1003, such as... Figure 7 and Figure 8 As shown, this design achieves the fixation of the cross brace 11 and the load-bearing keel 10, resulting in a stable connection structure. This avoids the need to use self-tapping screws to fix the cross brace 11 and the load-bearing keel 10, thus improving construction efficiency.

[0057] Furthermore, the hanger 9 is a threaded rod, and the top plate 1001 supporting the keel 10 has multiple circular holes 1004 distributed along its length. The end of the hanger 9 away from the expansion bolt 8 passes through the circular hole 1004. Adjusting nuts 12 are respectively fitted on the upper and lower sides of the top plate 1001, such as... Figure 9 and Figure 10 As shown. Rotating the upper and lower adjusting nuts 12 causes the supporting keel 10 to move up and down along the hanger 9; locking the upper and lower adjusting nuts 12 fixes the supporting keel 10 in a fixed position on the hanger 9. The movement of the supporting keel 10 causes the height of the sound-absorbing and sound-insulating composite ceiling panel 100 to change, adjusting the distance between the sound-absorbing and sound-insulating composite ceiling panel 100 and the bottom surface of the floor slab, which can meet the height requirements of different house ceilings.

[0058] Two adjusting nuts 12 are respectively provided with elastic damping pads 13 between the top plate 1001 of the supporting keel 10 to enhance the sound insulation effect against impact noise.

[0059] Furthermore, the distance between the floor slab 6 and the top surface of the gypsum board 1 of the sound-absorbing and sound-insulating composite ceiling panel 100 is 70~80mm, which can ensure a better sound insulation effect, take into account other construction work space, and have a limited impact on the floor height.

[0060] The construction process of the suspended ceiling is as follows: First, the construction personnel familiarize themselves with the drawings and site conditions, perform base treatment on the bottom surface of the floor slab 6, open through holes in the floor slab 6 for the expansion bolts 8 to pass through, install the expansion bolts 8 in the through holes, and fix the top of the hanger 9 to the expansion bolts 8. After determining the installation height of the load-bearing keel 10, screw the upper adjusting nut 12 onto the hanger 9. The hanger 9 passes through the upper elastic damping pad 13 and then through the round hole 1004 of the load-bearing keel 10. The upper elastic damping pad 13 contacts the upper surface of the top plate 1001 of the load-bearing keel 10. Place the lower elastic damping pad 13 on the inside of the load-bearing keel 10. The hanger 9 passes through the elastic damping pad 13. Then screw another adjusting nut 12 onto the hanger 9. The lower adjusting nut 12 abuts against the bottom surface of the elastic damping pad 13 on the inside of the top plate 1001, thus fixing the load-bearing keel 10 onto the hanger 9. Next, install the cross bracing 11 at the bottom of the supporting keel 10. Insert self-tapping screws from the bottom of the plasterboard 1, completely passing through the plasterboard 1 and the bottom plate 1101 of the cross bracing keel 11, until the end of the self-tapping screw is flush with the bottom surface of the plasterboard 1. At this point, the tip of the self-tapping screw is located within the cavity formed by the bottom plate 1101 and the second side plate 1102 of the cross bracing keel 11. Then, use self-tapping screws to attach the support strip 4 to the bottom surface of the plasterboard 1, place the melamine cotton board 3 in the space of the support strip 4, and use self-tapping screws to fix the melamine cotton board 3 to the plasterboard 1. Then, fix the microporous ceramic panel 2 to the bottom surface of the support strip 4, using self-tapping screws from the bottom of the microporous ceramic panel 2, completely passing through the microporous ceramic panel 2, until the tip of the self-tapping screw enters the support strip 4. To enhance the aesthetic effect of the suspended ceiling, finally apply a layer of putty or spray white sandstone onto the bottom surface of the microporous ceramic panel 2. After ensuring that the support strip 4 is filled with melamine cotton board 3, a total cavity 5 of 2~4mm is left. The position of the cavity 5 is not specified.

[0061] Next, the experimental results will demonstrate the sound insulation and sound absorption effects of the ceiling system of this invention.

[0062] Example 1:

[0063] The ceiling structure of this utility model is installed under a 120mm thick concrete floor slab 6. The gypsum board 1 is 10mm thick; the bottom layer of microporous ceramic board 2 is 10mm thick and has a surface density of 17.78kg / m³. 2 The thickness of the melamine cotton board 3 in the middle is 10mm; the height of the support strip 4 is 12mm, the width of the support strip 4 is 40mm, the thickness of the cavity 5 between the gypsum board 1 and the melamine cotton board 3 is 2mm, and the melamine cotton board 3 is in contact with the microporous ceramic board 2; the distance between the top surface of the gypsum board 1 of the sound-absorbing and sound-insulating composite ceiling board 100 and the bottom surface of the floor slab 6 is 70mm.

[0064] Example 2:

[0065] The difference from Example 1 is that the distance between the top surface of the gypsum board 1 of the sound-absorbing and sound-insulating composite ceiling panel 100 and the bottom surface of the floor slab 6 is 80mm, and the other conditions are exactly the same as in Example 1.

[0066] Comparative Example 1:

[0067] The 120mm concrete floor slab was not fitted with a suspended ceiling.

[0068] Comparative Example 2:

[0069] The difference from Comparative Example 1 is that only 10mm thick gypsum board 1 is used, and the distance between the top surface of gypsum board 1 and the bottom surface of floor slab 6 is 70mm.

[0070] The distance between the floor slab 6 and the top surface of the gypsum board 1 of the sound-absorbing and sound-insulating composite ceiling board 100 is greater than 80mm, which affects the floor height and makes the residents feel uncomfortable, so no experimental research is conducted.

[0071] Next, the sound absorption coefficients of Examples 1 and 2 were tested in the frequency bands of 250Hz, 500Hz, 1000Hz, and 2000Hz, and the noise reduction coefficient (NRC) was calculated. The specific values ​​are shown in Table 1. The airborne sound weighted insulation Rw and weighted normalized impact sound pressure level Ln,w of Examples 1, 2, Comparative Example 1, and Comparative Example 2 are also shown in Table 1.

[0072] Table 1

[0073] Classification Example 1 Example 2 Comparative Example 1 Comparative Example 2 NRC 0.50 0.50 - - Rw 58 59 52 55 Ln,w 66 65 77 69

[0074] The structural design with a distance of 70mm to 80mm between the floor slab and the top surface of the gypsum board of the sound-absorbing and sound-insulating composite ceiling panel can ensure a certain acoustic effect, take into account other construction work space, and have a limited impact on the floor height.

[0075] The ceiling of this invention has superior sound absorption and sound insulation effects; the ceiling is easy to install and has a stable connection structure; it also has a low impact on floor height, with an overall structural thickness of no more than 110mm, providing residents with a more comfortable and safe living environment.

[0076] In the embodiments of this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0077] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solutions of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. A sound-absorbing and sound-insulating composite ceiling panel, characterized in that, include: The top layer of plasterboard (1); The bottom layer of microporous ceramic plate (2); as well as Melamine cotton board (3) is placed between gypsum board (1) and microporous ceramic board (2); The bottom surface of the gypsum board (1) is fixedly spaced with support strips (4), the bottom end of the support strips (4) is connected to the top surface of the microporous ceramic board (2), and the melamine cotton board (3) is set between adjacent support strips (4).

2. The sound-absorbing and sound-insulating composite ceiling panel according to claim 1, characterized in that, The top surface of the microporous ceramic board (2) is connected to the bottom surface of the melamine cotton board (3). The melamine cotton board (3) and the gypsum board (1) are spaced apart. The gypsum board (1), the melamine cotton board (3) and the support strip (4) together form a cavity (5). Alternatively, the bottom surface of the gypsum board (1) is connected to the top surface of the melamine cotton board (3), the melamine cotton board (3) and the microporous ceramic board (2) are spaced apart, and the microporous ceramic board (2), the melamine cotton board (3) and the support strip (4) together form a cavity (5). Alternatively, melamine cotton board (3) is set apart from gypsum board (1) and microporous ceramic board (2), and gypsum board (1), melamine cotton board (3) and support strip (4) together form an upper cavity (5), and microporous ceramic board (2), melamine cotton board (3) and support strip (4) together form a lower cavity (5).

3. The sound-absorbing and sound-insulating composite ceiling panel according to claim 2, characterized in that, The total thickness of the cavity (5) ranges from 2 to 4 mm.

4. The sound-absorbing and sound-insulating composite ceiling panel according to claim 1, characterized in that, The support strip (4) is made of the same material as gypsum board (1) or microporous ceramic board (2).

5. The sound-absorbing and sound-insulating composite ceiling panel according to claim 1, characterized in that, Its thickness is 30~40mm.

6. A type of suspended ceiling for a house, characterized in that, It includes a suspension rod device (7) connected to the floor slab (6) and a sound-absorbing and sound-insulating composite ceiling panel according to any one of claims 1 to 5 disposed under the suspension rod device (7).

7. The suspended ceiling according to claim 6, characterized in that, The hanger assembly (7) includes an expansion bolt (8) set at the top of the floor slab (6), a hanger (9) connected to the end of the expansion bolt (8) away from the floor slab (6), a plurality of spaced load-bearing keels (10) connected to the end of the hanger (9) away from the expansion bolt (8), and a plurality of spaced cross bracing keels (11) fixedly connected to the bottom of the load-bearing keel (10). The load-bearing keel (10) and the cross bracing keel (11) are set perpendicular to each other, and the bottom surface of the cross bracing keel (11) is connected to the top surface of the sound-absorbing and sound-insulating composite ceiling panel.

8. The suspended ceiling according to claim 7, characterized in that, The supporting keel (10) includes a top plate (1001), and the top plate (1001) has first side plates (1002) at both ends in the width direction. The first side plates (1002) have through slots (1003). The cross bracing keel (11) includes a bottom plate (1101), and the bottom plate (1101) has a second side plate (1102) at both ends in the width direction. The second side plate (1102) has an inwardly folded edge (1103) at the end away from the bottom plate (1101). When the cross brace (11) is fixed to the bottom of the load-bearing keel (10), the straight edge (1103) of the cross brace (11) is engaged in the slot (1003).

9. The suspended ceiling according to claim 8, characterized in that, The lifting rod (9) is a threaded rod; The top plate (1001) supporting the keel (10) has multiple round holes (1004) distributed along its length. The end of the hanger (9) away from the expansion bolt (8) is inserted into the round hole (1004). Adjusting nuts (12) are respectively fitted on the upper and lower sides of the top plate (1001). Two adjusting nuts (12) are respectively provided with elastic damping pads (13) between the top plate (1001) of the bearing keel (10); Rotate the upper and lower adjusting nuts (12) to move the load-bearing keel (10) up and down along the rod (9); lock the upper and lower adjusting nuts (12) to fix the load-bearing keel (10) in position on the rod (9).

10. The suspended ceiling according to claim 9, characterized in that, The distance between the floor slab (6) and the top surface of the gypsum board (1) of the sound-absorbing and sound-insulating composite ceiling panel is 70~80mm.

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