An air conditioning machine room

Abstract

The utility model relates to the technical field of building engineering discloses an air conditioning machine room, comprising: a room body, the room body has installation cavity and sound absorption cavity in the inside, the room body has the air outlet that communicates with installation cavity and the air inlet that communicates with sound absorption cavity, air conditioning machine, air conditioning machine is installed in installation cavity, air conditioning machine is equipped with the air outlet pipe and return air duct, the air outlet pipe communicates with the air outlet, return air duct communicates with sound absorption cavity, and the air outlet pipe is equipped with the silencer, the air conditioning machine room can overcome the defect that the air conditioning machine room air supply and return air system noise control are insufficient in the prior art, and the technical problem of air supply pipeline noise and return air path noise is solved simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to an air conditioning room. Background Technology

[0002] Air conditioning systems are an indispensable infrastructure in modern buildings, especially large public buildings such as theaters, auditoriums, conference centers, and recording studios. Their main function is to regulate indoor temperature, humidity, and air quality to provide a comfortable indoor environment. However, during operation, the core equipment of an air conditioning system—the air conditioner unit, which includes power components such as fans and compressors—inevitably generates significant noise and mechanical vibration.

[0003] In traditional air conditioning room designs, supply and return air systems are typically installed to achieve air circulation. However, both supply and return air ducts are major pathways for noise propagation. On the supply air side, noise generated by components such as the fan inside the air conditioner propagates directly along the outlet duct and enters the room through the outlet, creating supply air noise. On the return air side, the conventional return air path usually connects to the air conditioner's return air duct through a simple return air cavity or return air plenum. This design suffers from insufficient noise control: firstly, the noise from the air conditioner's own operation travels backward along the return air duct into the return air cavity and propagates directly into the room; secondly, when the return airflow enters this return air cavity, the sudden decrease in space, faster flow velocity, and increased air pressure easily generate additional airflow-generated noise. Utility Model Content

[0004] The purpose of this utility model is to provide an air conditioning room that overcomes the shortcomings of insufficient noise control in the supply and return air systems of existing air conditioning rooms, and at the same time solves the technical problems of noise in the supply air duct and return air path.

[0005] To achieve the above objectives, this utility model provides an air conditioning room, comprising:

[0006] The room body has an installation cavity and a sound absorption cavity inside, and the room body has an air outlet connected to the installation cavity and an air inlet connected to the sound absorption cavity;

[0007] An air conditioner is installed in the mounting cavity. The air conditioner is provided with an air outlet pipe and a return air pipe. The air outlet pipe is connected to the air outlet, and the return air pipe is connected to the sound absorption cavity. A silencer is provided on the air outlet pipe.

[0008] Furthermore, the sound-absorbing cavity is provided with a plurality of sound-absorbing units spaced apart in the horizontal direction. The plurality of sound-absorbing units are staggered on the upper and lower walls of the sound-absorbing cavity. When projected in the horizontal direction, the sound-absorbing units on the upper wall of the sound-absorbing cavity and the sound-absorbing units on the lower wall of the sound-absorbing cavity partially overlap each other. The sound-absorbing cavity and the plurality of sound-absorbing units together define an airflow channel.

[0009] Furthermore, the sound-absorbing unit includes a sound-absorbing plate and a protective layer disposed on both ends of the sound-absorbing plate, wherein the protective layer is provided with a plurality of flow holes.

[0010] Furthermore, the air conditioning room also includes multiple mounting brackets, and multiple sound-absorbing units are detachably mounted on the mounting brackets one by one.

[0011] Furthermore, the mounting bracket includes a frame and two slot blocks. The frame is mounted on the sound-absorbing cavity, and the two slot blocks are spaced apart in the vertical direction. One slot block is in contact with the inner wall of the sound-absorbing cavity, and the other slot block is mounted on the frame. The sound-absorbing unit is mounted between the two slot blocks of the same mounting bracket.

[0012] Furthermore, the inner wall surface of the sound-absorbing cavity is covered with a sound-absorbing layer.

[0013] Furthermore, the sound-absorbing cavity has a communication port on its inner wall near the mounting cavity, which is connected to the mounting cavity. The return air duct is connected to the sound-absorbing cavity through the communication port. The inner wall of the communication port is covered with a first vibration isolation layer, and the inner wall of the air outlet is covered with a second vibration isolation layer.

[0014] Furthermore, a floating vibration isolation foundation is provided on the bottom wall of the mounting cavity, and the air conditioner is installed on the floating vibration isolation foundation.

[0015] Furthermore, the air conditioning room also includes a filter plate, which is installed at the air inlet.

[0016] Furthermore, the air outlet is located above the air inlet.

[0017] Compared with existing technologies, the beneficial effects of this embodiment of an air conditioning room are as follows: the air conditioner is installed in the installation cavity, and its operating noise is generated from this area. A sound-absorbing cavity separates the air conditioner from the return air vent, and another sound-absorbing cavity separates the air conditioner from the air inlet, which serves as the entrance to the indoor return air duct. The sound-absorbing cavity plays a dual role in noise reduction: firstly, for equipment noise generated by the air conditioner itself and propagating in the reverse direction along the return air duct, the sound-absorbing cavity, as an effective acoustic buffer and treatment area, can significantly attenuate and absorb the sound waves before they reach the air inlet, thereby effectively suppressing the propagation of equipment noise into the room via the return air path; secondly, for the return airflow entering from the air inlet and flowing towards the air conditioner, the aerodynamic noise that may be generated during its flow is also absorbed when it flows through the sound-absorbing cavity, helping to reduce its own noise level before the airflow enters the air conditioner, avoiding noise superposition and amplification. At the same time, the air conditioner fan, by installing a silencer on the air outlet duct, directly treats the noise of the air supply path, reducing the noise output of the air supply system to the room. Attached Figure Description

[0018] Figure 1 This is an isometric view of the air conditioning room according to an embodiment of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the air conditioning room according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the sound-absorbing unit and mounting bracket of the air conditioning room according to an embodiment of the present utility model;

[0021] In the diagram, 1 is the chamber body; 11 is the mounting cavity; 12 is the sound absorption cavity; 13 is the air outlet; 14 is the air inlet; and 15 is the connecting port.

[0022] 2. Air conditioner; 21. Air outlet duct; 22. Return air duct; 23. Silencer;

[0023] 3. Sound-absorbing unit; 31. Sound-absorbing panel; 32. Surface layer; 33. Flow holes;

[0024] 4. Airflow channel;

[0025] 5. Mounting bracket; 51. Frame body; 52. Channel block;

[0026] 6. Sound-absorbing layer;

[0027] 7. First vibration isolation layer;

[0028] 8. Second vibration isolation layer;

[0029] 9. Filter plate. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0031] In this description of the utility model, the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "lateral," and "longitudinal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the utility model and for simplifying the description, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0032] In this description of the utility model, the terms "provided with," "set up," "connected," and "placed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0034] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0035] like Figure 1-3 As shown, an air conditioning room according to an embodiment of the present invention includes:

[0036] The room body 1 has an installation cavity 11 and a sound absorption cavity 12 inside. The room body 1 has an air outlet 13 connected to the installation cavity 11 and an air inlet 14 connected to the sound absorption cavity 12.

[0037] Air conditioner 2 is installed in the installation cavity 11. Air conditioner 2 is provided with an air outlet duct 21 and a return air duct 22. The air outlet duct 21 is connected to the air outlet 13, and the return air duct 22 is connected to the sound absorption cavity 12. A silencer 23 is provided on the air outlet duct 21.

[0038] Based on the above technical solution, the air conditioner 2 is installed in the mounting cavity 11, and its operating noise is generated from this area. A sound-absorbing cavity 12 separates the air conditioner 2 from the return air vent, and another sound-absorbing cavity 12 separates the air conditioner from the air inlet 14, which serves as the entrance to the indoor return air duct. The sound-absorbing cavity 12 plays a dual role in noise reduction: First, for the equipment noise generated by the operation of the air conditioner 2 itself and propagating in the reverse direction along the return air duct 22, the sound-absorbing cavity 12, as an effective acoustic buffer and treatment area, can significantly attenuate and absorb the sound waves before they reach the air inlet 14, thereby effectively suppressing the propagation of equipment noise into the room via the return air path; second, for the return airflow entering from the air inlet 14 and flowing towards the air conditioner 2, the aerodynamic noise that may be generated during its flow is also absorbed when it flows through the sound-absorbing cavity 12, helping to reduce its own noise level before the airflow enters the air conditioner 2, avoiding noise superposition and amplification. At the same time, the air conditioner fan directly processes the noise of the air supply path by installing a silencer 23 on the air outlet duct 21, thereby reducing the noise output of the air supply system to the room.

[0039] Preferably, the sound-absorbing cavity 12 is provided with a plurality of sound-absorbing units 3 arranged at intervals along the horizontal direction. The plurality of sound-absorbing units 3 are staggered on the upper and lower walls of the sound-absorbing cavity 12. When projected along the horizontal direction, the sound-absorbing units 3 arranged on the upper wall of the sound-absorbing cavity 12 and the sound-absorbing units 3 arranged on the lower wall of the sound-absorbing cavity 12 partially overlap each other, and the sound-absorbing cavity 12 and the plurality of sound-absorbing units 3 together define an airflow channel 4.

[0040] Specifically, the overlap area of ​​the sound-absorbing unit 3 disposed on the upper wall of the sound-absorbing cavity 12 and the sound-absorbing unit 3 disposed on the lower wall of the sound-absorbing cavity 12 accounts for more than 50% of the area of ​​a single sound-absorbing unit 3.

[0041] By staggering multiple sound-absorbing units 3 on the upper and lower walls of the sound-absorbing cavity 12, a tortuous airflow channel 4 is structurally defined, which forms two noise reduction mechanisms:

[0042] 1. Since sound waves cannot propagate in a straight line, their actual propagation distance in the sound-absorbing cavity 12 must be greater than the straight length of the sound-absorbing cavity 12 along the airflow direction. The effective sound path increases, which, according to acoustic principles, helps the sound energy to naturally attenuate as the propagation distance increases.

[0043] 2. Due to the elimination of the straight path, the sound wave will inevitably come into repeated contact with and be reflected by the sound-absorbing surfaces of multiple sound-absorbing units 3 during its propagation. The sound-absorbing function of the sound-absorbing unit 3 itself ensures that each contact constitutes an effective sound energy absorption. Therefore, by increasing the number of contacts between the sound wave and the sound-absorbing unit 3, the noise is reduced step by step and cumulatively, thus improving the overall noise reduction performance of the sound-absorbing cavity 12.

[0044] The overlap area of ​​the sound-absorbing unit 3 disposed on the upper wall of the sound-absorbing cavity 12 and the sound-absorbing unit 3 disposed on the lower wall of the sound-absorbing cavity 12 is greater than 50% of the area of ​​a single sound-absorbing unit 3. Since mid-to-low frequency sound waves have longer wavelengths and stronger diffraction capabilities, if the gap between the sound-absorbing units 3 (i.e., the non-overlapping portion) is too large, mid-to-low frequency noise can easily pass through through the diffraction effect. However, an overlap rate greater than 50% greatly compresses the diffractable space, thereby improving the control capability for noise in this frequency band and making the noise reduction bandwidth of the sound-absorbing cavity 12 wider.

[0045] More preferably, the sound-absorbing unit 3 includes a sound-absorbing plate 31 and a protective layer 32 disposed on both ends of the sound-absorbing plate 31, and the protective layer 32 is provided with a plurality of flow holes 33.

[0046] Specifically, the perforation rate of the flow hole 33 on the protective layer 32 is greater than 25%, the protective layer 32 is made of hot-dip galvanized steel sheet, and the sound-absorbing panel 31 is made of glass wool.

[0047] The sound-absorbing panel 31 is made of loose or semi-rigid fiber materials such as glass wool, which has low strength. The protective layer 32 provides a sturdy frame for it, ensuring that the sound-absorbing unit 3 can maintain its geometric shape and structural integrity during manufacturing, transportation and installation. The protective layer 32 effectively prevents the internal fiber material of the sound-absorbing panel 31 from being scattered into the air due to airflow, ensuring the cleanliness of the return airflow. At the same time, it also protects the internal sound-absorbing panel 31 from external physical damage, thereby improving the overall durability and service life of the sound-absorbing unit 3.

[0048] By creating multiple flow holes 33 on the protective layer 32, especially when the porosity of the flow holes 33 is greater than 25%, the sound-absorbing unit 3 achieves high-efficiency sound absorption performance across a wide frequency range. A porosity greater than 25% ensures that the protective layer 32 itself has high sound wave permeability. Sound energy across a wider frequency range, especially mid-to-high frequency sound energy that is easily reflected by solid surfaces, can pass through the protective layer 32 with minimal loss and be efficiently absorbed by the sound-absorbing plate 31 behind it, avoiding the problem of excessive sound wave reflection caused by insufficient porosity in the protective layer 32. A porosity greater than 25% is the technical guarantee that the sound-absorbing unit 3, as a "porous sound absorber," exhibits excellent sound absorption performance across a wide frequency range.

[0049] Preferably, the air conditioning room also includes multiple mounting brackets 5, and multiple sound-absorbing units 3 are detachably mounted on the mounting brackets 5 in a one-to-one correspondence.

[0050] After long-term operation of the air conditioning system, dust or contaminants may accumulate on the surface of the sound-absorbing unit 3, affecting its sound absorption performance and air quality. The sound-absorbing unit 3 is detachably installed on the mounting bracket 5, allowing maintenance personnel to easily remove it for cleaning and maintenance before reinstalling it, reducing maintenance difficulty and workload. If a sound-absorbing unit 3 needs to be replaced due to accidental damage or performance degradation, only the faulty unit can be quickly and independently replaced without damaging other surrounding structures, effectively extending the service life of the facility.

[0051] More preferably, the mounting bracket 5 includes a frame 51 and two slot blocks 52. The frame 51 is mounted on the sound absorption cavity 12, and the two slot blocks 52 are spaced apart in the vertical direction. One slot block 52 is in contact with the inner wall of the sound absorption cavity 12, and the other slot block 52 is mounted on the frame 51. The sound absorption unit 3 is mounted between the two slot blocks 52 of the same mounting bracket 5.

[0052] Specifically, the groove block 52 is made of elastic materials such as rubber.

[0053] The mounting bracket 5 securely holds the sound-absorbing unit 3 between the two slot blocks 52, and the slot blocks 52 are made of elastic material to effectively prevent them from shifting, tilting or generating vibration noise due to airflow disturbance in the sound-absorbing cavity 12 or external vibration.

[0054] Preferably, the inner wall surface of the sound-absorbing cavity 12 is covered with a sound-absorbing layer 6.

[0055] Specifically, the sound-absorbing layer 6 includes a glass wool board and a glass fiber cloth bag covering the outer periphery of the glass wool board.

[0056] Within the sound-absorbing cavity 12, sound waves not directly absorbed by the sound-absorbing unit 3 propagate to the upper, lower, and side walls. Without the sound-absorbing layer 6, these walls would become reflective surfaces, causing sound energy to be repeatedly reflected within the cavity, creating reverberation and thus reducing the overall noise reduction effect. With the sound-absorbing layer 6 installed, these walls also transform into sound-absorbing surfaces, capable of absorbing the sound energy propagating upon them, ensuring the sound absorption effect of the sound-absorbing cavity 12.

[0057] Preferably, the sound-absorbing cavity 12 has a communication port 15 on the inner wall near the mounting cavity 11, which is connected to the mounting cavity 11. The return air duct 22 is connected to the sound-absorbing cavity 12 through the communication port 15. The inner wall of the communication port 15 is covered with a first vibration isolation layer 7, and the inner wall of the air outlet 13 is covered with a second vibration isolation layer 8.

[0058] By covering the inner wall of the connecting opening 15 with a first vibration isolation layer 7, the vibration transmitted from the return air duct 22 to the room 1 is effectively isolated. The mechanical vibration generated by the air conditioner 2 during operation will propagate along the rigid return air duct 22. In the traditional connection method, when the return air duct 22 passes through the connecting opening 15, its vibration will be directly transmitted to the room 1 between the sound absorption cavity 12 and the mounting cavity 11, causing the room 1 itself to become a secondary noise source, radiating structural noise outward. By setting the first vibration isolation layer 7, which is made of elastic damping material, a flexible connection is established between the return air duct 22 and the rigid wall. The first vibration isolation layer 7 can absorb and dissipate the vibration energy transmitted from the return air duct 22, reduce structural sound transmission, and protect the acoustic environment of the sound absorption cavity 12 from the interference of structural vibration.

[0059] By covering the inner wall of the air outlet 13 with a second vibration isolation layer 8, vibrations transmitted from the air outlet 21 to the room 1 are effectively isolated. Similarly, vibrations can also propagate along the air outlet 21 to the air outlet 13, directly transmitting to the room 1 and affecting the comfort of occupants. The second vibration isolation layer 8 also establishes a flexible connection between the air outlet 13 and the room 1, blocking the transmission path of structural vibrations at the source. The second vibration isolation layer 8 absorbs and dissipates the vibration energy transmitted from the air outlet 21, reducing structural sound transmission and protecting the acoustic environment of the sound-absorbing cavity 12 from structural vibration interference.

[0060] Preferably, a floating vibration isolation foundation is provided on the bottom wall of the mounting cavity 11, and the air conditioner 2 is installed on the floating vibration isolation foundation.

[0061] Air conditioner 2 is the main vibration source in the entire system. The strong vibrations it generates during operation produce noise. If it is directly installed on the bottom wall of room 1, the vibration will be transmitted to the main structure of the building without any obstruction. The floating vibration isolation foundation, by setting an elastic vibration isolation layer (such as vibration isolators, vibration isolation pads, etc.) on the bottom wall of the mounting cavity 11, will absorb most of the vibration and noise of the air conditioner 2 after it is transmitted to the elastic vibration isolation layer, ensuring the quietness of the air conditioning room itself and the surrounding building structure, and improving the long-term operational reliability and safety of the air conditioning room.

[0062] Preferably, the air conditioning room also includes a filter plate 9, which is installed at the air inlet 14.

[0063] The filter plate 9 prevents contaminants from entering the sound absorption cavity 12 and adhering to the surfaces of the sound absorption unit 3 and the sound absorption layer 6. If the micropores of the sound-absorbing material are clogged with dust, its sound absorption performance will significantly decrease. Therefore, the filter plate 9 helps maintain the designed noise reduction effect of the sound absorption cavity 12 over the long term. By intercepting contaminants, the filter plate 9 reduces the risk of dust accumulation and clogging in core components such as the heat exchanger coils and fan impellers inside the air conditioner 2. This not only maintains the heat exchange efficiency and operating efficiency of the air conditioner 2, saving energy, but also significantly extends the maintenance cycle and service life of these core components.

[0064] Preferably, the air outlet 13 is located above the air inlet 14.

[0065] In summary, this embodiment of the utility model provides an air conditioning room in which the air conditioner 2 is installed in the installation cavity 11, and the noise generated during its operation is generated in this area. A sound-absorbing cavity 12 is spaced between the air conditioner 2 and the return air vent, and another sound-absorbing cavity 12 is spaced between the air conditioner 2 and the air inlet 14, which serves as the entrance to the indoor return air duct. The sound-absorbing cavity 12 plays a dual role in noise reduction: First, for the equipment noise generated by the operation of the air conditioner 2 itself and propagating in the reverse direction along the return air duct 22, the sound-absorbing cavity 12, as an effective acoustic buffer and treatment area, can significantly attenuate and absorb the sound waves before they reach the air inlet 14, thereby effectively suppressing the propagation of equipment noise into the room via the return air path; second, for the return airflow entering from the air inlet 14 and flowing towards the air conditioner 2, the aerodynamic noise that may be generated during its flow is also absorbed when it flows through the sound-absorbing cavity 12, helping to reduce its own noise level before the airflow enters the air conditioner 2, avoiding noise superposition and amplification. At the same time, the air conditioner fan directly processes the noise of the air supply path by installing a silencer 23 on the air outlet duct 21, thereby reducing the noise output of the air supply system to the room.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An air conditioning room, characterized in that, include: The room (1) has an installation cavity (11) and a sound absorption cavity (12) inside. The room (1) has an air outlet (13) connected to the installation cavity (11) and an air inlet (14) connected to the sound absorption cavity (12). An air conditioner (2) is installed in the mounting cavity (11). The air conditioner (2) is provided with an air outlet pipe (21) and a return air pipe (22). The air outlet pipe (21) is connected to the air outlet (13), and the return air pipe (22) is connected to the sound absorption cavity (12). A silencer (23) is provided on the air outlet pipe (21).

2. The air conditioning room according to claim 1, characterized in that, The sound-absorbing cavity (12) is provided with a plurality of sound-absorbing units (3) spaced apart in the horizontal direction. The plurality of sound-absorbing units (3) are staggered on the upper and lower walls of the sound-absorbing cavity (12). Projected in the horizontal direction, the sound-absorbing units (3) on the upper wall of the sound-absorbing cavity (12) and the sound-absorbing units (3) on the lower wall of the sound-absorbing cavity (12) partially overlap each other. The sound-absorbing cavity (12) and the plurality of sound-absorbing units (3) together define an airflow channel (4).

3. The air conditioning room according to claim 2, characterized in that, The sound-absorbing unit (3) includes a sound-absorbing plate (31) and a protective layer (32) disposed on both ends of the sound-absorbing plate (31). The protective layer (32) has multiple flow holes (33).

4. The air conditioning room according to claim 2, characterized in that, It also includes multiple mounting brackets (5), and multiple sound-absorbing units (3) are detachably mounted on the mounting brackets (5) in a one-to-one correspondence.

5. The air conditioning room according to claim 4, characterized in that, The mounting bracket (5) includes a frame (51) and two slot blocks (52). The frame (51) is mounted on the sound-absorbing cavity (12). The two slot blocks (52) are spaced apart in the vertical direction. One slot block (52) is in contact with the inner wall of the sound-absorbing cavity (12), and the other slot block (52) is mounted on the frame (51). The sound-absorbing unit (3) is mounted between the two slot blocks (52) of the same mounting bracket (5).

6. The air conditioning room according to claim 1, characterized in that, The inner wall of the sound-absorbing cavity (12) is covered with a sound-absorbing layer (6).

7. The air conditioning room according to claim 1, characterized in that, The sound-absorbing cavity (12) has a communication port (15) on its inner wall near the mounting cavity (11) that communicates with the mounting cavity (11). The return air duct (22) is connected to the sound-absorbing cavity (12) through the communication port (15). The inner wall of the communication port (15) is covered with a first vibration isolation layer (7), and the inner wall of the air outlet (13) is covered with a second vibration isolation layer (8).

8. The air conditioning room according to claim 1, characterized in that, The bottom wall of the mounting cavity (11) is provided with a floating vibration isolation foundation, and the air conditioner (2) is installed on the floating vibration isolation foundation.

9. The air conditioning room according to claim 1, characterized in that, It also includes a filter plate (9) installed at the air inlet (14).

10. The air conditioning room according to claim 1, characterized in that, The air outlet (13) is located above the air inlet (14).

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