air conditioner outdoor unit

Abstract

This application discloses an outdoor unit for an air conditioner, belonging to the technical field of air conditioning. The outdoor unit includes a casing, an outdoor heat exchanger, a fan, a compressor, a silencer shell, and a resonant module. The outdoor heat exchanger, fan, and compressor are located inside the casing. The compressor includes an intake pipe and an exhaust pipe. The intake pipe is used to supply low-pressure refrigerant into the compressor. The exhaust pipe is used to supply high-pressure refrigerant out of the compressor. The silencer shell is located on the exhaust pipe, and openings are provided at both ends along its length to allow gaseous refrigerant to enter and exit the silencer shell. The resonant module is located inside the silencer shell. The resonant module includes a diaphragm, which is arranged along the length of the silencer shell. The diaphragm vibrates when gaseous refrigerant passes through it to convert sound energy into kinetic energy. Multiple resonant modules are configured, and the diaphragms in the multiple resonant modules are arranged independently. At least some of the diaphragms have different tensions and / or thicknesses to differentiate the diaphragm design, thereby enabling the diaphragm to silence noise in different frequency bands.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioning, and particularly relates to an outdoor unit of an air conditioner. Background Technology

[0002] The compressor is a crucial component of an air conditioning system. Refrigerant circulates between the compressor, condenser, and evaporator to achieve cooling or heating. Compressors typically have intake and exhaust pipes. The intake pipe introduces the low-pressure refrigerant from the evaporator into the compressor, while the exhaust pipe delivers the compressed, high-temperature, high-pressure refrigerant to the condenser. The compressor's exhaust pipe is prone to generating pulsating noise, which can easily be transmitted indoors through the piping connecting the indoor and outdoor units, causing annoyance and reducing the user experience.

[0003] A muffler is usually installed on the exhaust pipe of the compressor to effectively suppress the noise generated by the compressor exhaust. However, in related technologies, the noise reduction effect of the muffler is limited, and some mufflers can only suppress noise in a specific frequency band. For noise outside the specific frequency band, the muffler effect is poor.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] To address the shortcomings of related technologies, this application provides an air conditioner outdoor unit that converts the acoustic energy carried by the refrigerant into the kinetic energy of the membrane by setting multiple sets of membranes inside the sound-absorbing shell, thereby reducing noise; the multiple sets of membranes are designed differently so that at least some of the membranes have different tension and / or thickness, so that the membranes can silence noise in different frequency bands.

[0006] This application provides an outdoor unit for an air conditioner, comprising: The casing includes an air inlet and an air outlet; The outdoor heat exchanger is located inside the casing; The fan is located inside the casing; by operating the fan, airflow is introduced into the casing from the air inlet, and after heat exchange by the outdoor heat exchanger, it is discharged from the casing from the air outlet. A compressor, located inside a housing, is used to compress low-pressure refrigerant into high-pressure refrigerant; the compressor includes: The intake pipe is used to supply low-pressure refrigerant to the compressor; The exhaust pipe is used to supply high-pressure refrigerant to flow out of the compressor; The muffler is located on the exhaust pipe and has openings at both ends along its length to allow gaseous refrigerant to enter and exit the muffler. The resonant module is housed within the sound-absorbing enclosure; the resonant module includes: A thin film is installed along the length of the sound-absorbing shell; when the gaseous refrigerant passes through the film, the film vibrates to convert sound energy into kinetic energy. Multiple resonant modules are configured, and the thin films in the multiple resonant modules are set independently; at least some of the thin films have different tensions and / or thicknesses.

[0007] In this technical solution, a silencing shell is installed in the compressor's exhaust pipe, and a thin film is installed inside the silencing shell along its length. When the high-pressure gaseous refrigerant discharged from the compressor flows through the silencing shell, the sound wave energy generated by the refrigerant flow acts on the thin film. Under the action of sound pressure, the thin film undergoes forced vibration, thereby converting the sound energy that originally existed in the form of noise into the mechanical vibration kinetic energy of the thin film, effectively attenuating the noise generated by refrigerant pulsation. By setting multiple resonant modules, the noise reduction effect of the resonant modules is increased. By making at least some of the film tension and / or thickness different, the resonant modules are no longer limited to the silencing capability of a single frequency or narrow frequency band, so that the resonant modules can have good noise reduction effects on noise in different frequency bands.

[0008] In some embodiments of this application, the resonant module includes a mounting bracket for fixing the diaphragm; the length direction of the mounting bracket is arranged along the length direction of the sound-absorbing shell; the width direction of the mounting bracket is arranged along the radial direction of the sound-absorbing shell.

[0009] In the technical solution, a mounting frame is set inside the sound-absorbing shell, with the length direction of the mounting frame along the length direction of the sound-absorbing shell and the width direction along the radial direction of the sound-absorbing shell. This allows the membrane to be mounted on the mounting frame, thereby fixing and supporting the membrane and allowing the membrane to extend along the length direction of the sound-absorbing shell.

[0010] In some embodiments of this application, the multiple resonant modules include multiple mounting brackets, which are arranged around the axis of the silencing shell; each mounting bracket is equipped with a thin film, and the thin films on different mounting brackets are set independently of each other.

[0011] In the technical solution, by arranging multiple mounting brackets in a ring around the axis of the anechoic shell, not only can the entire cross-sectional area of ​​the anechoic shell be fully utilized, but also as many mounting brackets as possible can be arranged in a limited space, thereby increasing the effective surface area of ​​the membrane participating in the sound absorption effect; and the independent membranes on the mounting brackets can respond to sound waves of different frequencies or intensities, so that the entire resonant module can cover a wider range of noise frequencies, thereby increasing the noise reduction effect.

[0012] In some embodiments of this application, a fixing member is provided inside the silencing housing, and the fixing member is located on the axis of the silencing housing; one end of the mounting bracket in the width direction is connected to the fixing member, and the other end of the mounting bracket in the width direction points to the inner wall of the silencing housing.

[0013] In the technical solution, by firmly connecting one end of the mounting bracket in the width direction to the fixing component and the other end pointing to the inner wall of the silencing shell, not only can the fixing method of the mounting bracket in the silencing shell be simplified, but the overall structure is also simple. It can evenly distribute the stress generated by the diaphragm vibration to the fixing component and the shell wall, thereby improving the mechanical strength and fatigue resistance of the resonant module.

[0014] In some embodiments of this application, the resonant module further includes a mounting frame for fixing the thin film; the mounting frame is connected to a mounting bracket; multiple mounting frames are configured and connected to the same mounting bracket; at least some of the mounting frames are arranged along the length direction of the mounting bracket.

[0015] In the technical solution, an installation frame is set up to fix the film, and the installation frame is installed on a fixed mounting bracket to reduce the difficulty of fixing the film.

[0016] In some embodiments of this application, the film and the mounting frame are configured in a one-to-one correspondence; the films on different mounting frames are configured independently of each other.

[0017] In this technical solution, by setting multiple mounting frames and films in a one-to-one correspondence, the multiple films can be set up independently, allowing each film to vibrate relatively independently. This effectively avoids the risk of mutual interference or overall structural resonance failure caused by vibration mode coupling, thus improving the stability of the resonant module. Furthermore, when a film is damaged due to long-term vibration or unexpected factors, only the corresponding mounting frame module needs to be replaced, without scrapping the entire resonant module, reducing maintenance costs and difficulty. In addition, smaller films are easier to install than larger films, and setting multiple films for separate fixing reduces the overall difficulty of fixing the films.

[0018] In some embodiments of this application, a mass block is provided on the film, the mass block is located at the center of the film, and the mass block vibrates synchronously with the film.

[0019] In the technical solution, by setting a mass block on the thin film, the vibration amplitude of the thin film is increased, thereby enabling the thin film to consume more sound energy and increasing the noise reduction effect of the resonant module.

[0020] In some embodiments of this application, the relationship between the resonant frequency of the thin film and the parameters of the thin film is as follows:

[0021] In the formula, f0 is the first-order resonant frequency, a is the length of the film, b is the width of the film, T is the tension of the film, ρ is the density of the film, h is the thickness of the film, and m is the mass of the mass block.

[0022] The technical solution clarifies the relationship between thin film parameters and resonant frequency. By using the resonant frequency of the thin film, its size, tension, density, and other parameters such as the thickness, length, width, and mass of the mass block, the resonant module can be precisely tuned to the target noise frequency, thereby obtaining optimal noise reduction performance and avoiding blind design.

[0023] In some embodiments of this application, the dimensions at both ends of the silencing shell along its length are smaller than the dimensions of the middle portion of the silencing shell.

[0024] In the technical solution, by designing the silencing shell as a structure that is narrow at both ends and wide in the middle, the silencing shell itself can not only silence the gas flowing into it, but also increase the silencing effect of the resonant module. The smaller opening allows the airflow to accelerate when entering and leaving the silencing shell, enhancing the impact force of the airflow on the membrane. Meanwhile, the expansion cavity in the middle reduces the flow rate of the refrigerant and prolongs the effective contact time between the refrigerant and the membrane, making the sound energy absorption and conversion process more complete.

[0025] In addition, this application also provides an outdoor unit for an air conditioner, comprising: The casing includes an air inlet and an air outlet; The outdoor heat exchanger is located inside the casing; The fan is located inside the casing; by operating the fan, airflow is introduced into the casing from the air inlet, and after heat exchange by the outdoor heat exchanger, it is discharged from the casing from the air outlet. A compressor, located inside a housing, is used to compress low-pressure refrigerant into high-pressure refrigerant; the compressor includes: The intake pipe is used to supply low-pressure refrigerant to the compressor; The exhaust pipe is used to supply high-pressure refrigerant to flow out of the compressor; A silencer housing, located on the exhaust pipe, is used to silence the gas discharged from the compressor. The resonant module is housed within the sound-absorbing enclosure; the resonant module includes: A thin film is provided along the length of the sound-absorbing shell; When the gaseous refrigerant passes through the membrane, the membrane vibrates to convert acoustic energy into kinetic energy.

[0026] In the technical solution, a silencer shell is installed in the compressor's exhaust pipe to silence the gas discharged from the compressor; and a resonant module is installed in the compressor's exhaust pipe to silence the gas discharged from the compressor using a diaphragm. The silencer shell and the diaphragm work together to silence the gas, thereby increasing the overall noise reduction effect.

[0027] In the above embodiments, an outdoor air conditioning unit reduces noise by setting a thin film inside the sound-absorbing shell to convert the sound energy carried by the refrigerant into the kinetic energy of the film; the film is set into multiple groups and designed differently so that the tension and / or thickness of the film are different, so as to reduce noise for different frequency bands; and the sound-absorbing shell itself and the film work together to form dual noise reduction, which increases the noise reduction effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of one embodiment of the outdoor unit of the air conditioner in this application; Figure 2 This is a schematic diagram of the structure of the outdoor unit of the air conditioner in one embodiment of this application when the fan cover is not installed; Figure 3 This is a schematic diagram of the internal structure of the casing of an outdoor unit of an air conditioner in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of the noise reduction component in one embodiment of the outdoor unit of the air conditioner in this application; Figure 5 This is a schematic diagram of the sound-absorbing component from another angle in the first embodiment of the outdoor unit of the air conditioner in this application; Figure 6 yes Figure 5 Sectional view of AA; Figure 7 This is a schematic diagram of the ultrasonic module in the first embodiment of the outdoor unit of the air conditioner in this application; Figure 8 yes Figure 7 Enlarged view of a portion of point A in the middle; Figure 9 This is a schematic diagram of the mounting bracket in one embodiment of the outdoor unit of the air conditioner in this application; Figure 10 This is a schematic diagram of the resonant module in one embodiment of the outdoor unit of the air conditioner in this application.

[0029] In the diagram, 100 is the casing; 200 is the fan cover; 300 is the fan; 400 is the outdoor heat exchanger; 500 is the compressor; and 600 is the noise reduction assembly. 101. Air inlet; 102. Air outlet; 110. Partition; 510. Intake pipe; 520. Exhaust pipe; 601. Opening; 610. Sound-absorbing shell; 620. Resonant module; 630. Fixing component; 621. Mounting bracket; 622. Resonant unit; 6211. Longitudinal beam; 6212. Crossbeam; 6221. Mounting frame; 6222. Membrane; 6223. Mass block. Detailed Implementation

[0030] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0031] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0032] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0033] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0034] The outdoor unit of the air conditioner provided in this application can have various implementation forms. Figures 1-3 This is one specific implementation of the outdoor unit of the air conditioner in this application.

[0035] like Figure 1 As shown, the outdoor unit of the air conditioner provided in this application includes a housing 100, which forms the overall appearance of the outdoor unit. The top and bottom of the housing 100 are opposite ends, and the height direction of the housing 100 is from the top to the bottom. The left and right sides of the housing 100 are opposite sides, and the length direction of the housing 100 is from the left to the right. The front and rear sides of the housing 100 are opposite sides, and the thickness direction of the housing 100 is from the front to the rear.

[0036] like Figure 1 As shown, the housing 100 includes an air inlet 101, which is connected to the interior of the housing 100. Air from outside the housing 100 enters the interior of the housing 100 through the air inlet 101.

[0037] like Figure 2As shown, the housing 100 includes an air outlet 102, which is located on the front side of the housing 100 and communicates with the interior of the housing 100. Air from inside the housing 100 is output to the outside through the air outlet 102.

[0038] like Figure 3 As shown, the housing 100 includes a partition 110, which is located inside the housing 100. The partition 110 is arranged along the height direction of the housing 100 and divides the interior of the housing 100 into a first chamber and a second chamber. The air inlet 101 and the air outlet 102 are respectively connected to the first chamber.

[0039] In some embodiments, the air inlet 101 is located on the rear side of the housing 100 and on the side wall of the first chamber away from the second chamber, so that the air inlet 101 has a larger size, thereby increasing the air intake of the outdoor unit of the air conditioner.

[0040] like Figure 2 and Figure 3 As shown, the outdoor unit of the air conditioner includes a fan 300, which is located in the first chamber, with the air outlet side of the fan 300 facing the air outlet 102. Through the operation of the fan 300, external air is introduced into the housing 100 through the air inlet 101 and / or air inside the housing 100 is discharged to the outside of the housing 100 through the air outlet 102.

[0041] In this embodiment, the fan 300 is an axial flow fan 300, and the rotation axis of the fan 300 is set along the thickness direction of the casing 100.

[0042] like Figure 1 As shown, the outdoor unit of the air conditioner includes a fan cover 200, which is located at the air outlet 102 and is installed on the front side of the casing 100. The fan cover 200 can protect the fan 300 from entering the casing 100 through the air outlet 102 and coming into contact with the fan 300. On the other hand, it can make the air drawn in by the fan 300 more concentrated, thereby increasing the speed and pressure of the air and ultimately increasing the air output of the fan.

[0043] like Figure 3 As shown, the outdoor unit of the air conditioner includes an outdoor heat exchanger 400, which is located in the first chamber. The outdoor heat exchanger 400 is used to exchange heat with the air passing through it. The windward side of the outdoor heat exchanger 400 is arranged facing the air inlet 101, and at least part of the leeward side of the outdoor heat exchanger 400 is arranged facing the air inlet side of the fan 300. The operation of the fan 300 accelerates the heat exchange between the air and the outdoor heat exchanger 400, thereby increasing the heat exchange effect of the outdoor heat exchanger 400.

[0044] The outdoor heat exchanger 400 extends from the left side of the housing 100, through the rear side of the housing 100, to a position near the right side of the housing 100. Without changing the internal space of the housing 100, the heat exchange area of ​​the outdoor heat exchanger 400 can be increased, thereby increasing the heat exchange efficiency of the outdoor heat exchanger 400.

[0045] like Figure 3 As shown, the outdoor unit of the air conditioner includes a compressor 500, which is located in the second chamber. The compressor 500 is used to compress low-pressure refrigerant into high-pressure refrigerant. The refrigerant flows in the refrigerant circulation loop formed by the compressor 500, condenser, and evaporator to achieve cooling or heating of the outdoor unit of the air conditioner.

[0046] The compressor 500 includes an intake line 510 for supplying low-pressure refrigerant into the compressor 500; the intake line 510 is typically connected to the evaporator.

[0047] The compressor 500 includes a discharge line 520 for supplying high-pressure refrigerant to the compressor 500; the discharge line 520 is typically connected to the condenser.

[0048] When the compressor 500 is working, it periodically compresses and discharges high-temperature and high-pressure gaseous refrigerant. When this high-speed, pulsating refrigerant gas flow rushes out of the compressor 500 and enters the relatively narrow exhaust pipe 520, it will generate violent airflow disturbance, impact and eddy current, causing the exhaust pipe 520 to vibrate and generate noise. The noise can easily be transmitted to the room through the connecting pipe between the outdoor unit and the indoor unit of the air conditioner, causing trouble for the user and reducing the user experience.

[0049] The exhaust pipe 520 is usually equipped with a muffler assembly 600 to reduce the noise of the gas flowing through it. The muffler assembly 600 is usually a silencer. The silencer can effectively reduce the transmitted noise of the compressor 500 within a certain frequency range. However, for noise outside the specific frequency range, the silencer cannot perform its silencing function well.

[0050] Based on this, in this application, multiple sets of membranes 6222 are provided inside the silencing shell 610. By differentiating the design of the multiple sets of membranes 6222, the tension and / or thickness of the membranes 6222 are different, so as to broaden the silencing frequency of the membranes 6222 and enable the membranes 6222 to silencing noise in different frequency bands.

[0051] Specifically, such as Figures 4-6 As shown, the muffler assembly 600 includes a muffler housing 610, which is disposed on the exhaust pipe 520. The two ends of the muffler housing 610 in the length direction are respectively provided with openings 601, which are connected to the interior of the muffler housing 610 and the exhaust pipe 520 to allow gaseous refrigerant to enter and exit the muffler housing 610.

[0052] The dimensions at both ends of the silencing shell 610 in the length direction are smaller than the dimensions of the middle part of the silencing shell 610, so that when the gaseous refrigerant flows through the silencing shell 610, the silencing shell 610 can reduce the noise of the gaseous refrigerant.

[0053] Due to the sudden change in the inner diameter of the anechoic shell 610, impedance mismatch occurs in the expansion section with a larger inner diameter, and some sound energy is reflected back to the direction of the sound source. At the same time, the expansion section lengthens the propagation path of the sound waves, causing different reflected sound waves to interfere with each other, and the sound energy at a specific frequency is attenuated due to phase cancellation. The internal cavity of the anechoic shell 610 also absorbs sound energy at specific frequencies, and the airflow turbulence and viscosity effects further convert the sound energy into heat energy, thereby achieving the anechoic effect.

[0054] It should be noted that, in some embodiments, the silencing shell 610 in this application is a silencer in the related technology, and the silencing shell 610 can reduce low-frequency noise.

[0055] like Figure 6 As shown, the noise reduction assembly 600 includes a resonant module 620, which is disposed inside the noise reduction shell 610 and is used to convert sound energy into kinetic energy to increase the noise reduction effect of the noise reduction assembly 600.

[0056] The resonant module 620 includes a diaphragm 6222, which is arranged along the length of the sound-absorbing shell 610. When the gaseous refrigerant passes through the diaphragm 6222, the diaphragm 6222 vibrates to convert sound energy into kinetic energy.

[0057] In some embodiments, the film 6222 is made of silicone and is elastic to prevent it from breaking during vibration.

[0058] like Figure 7 As shown, multiple resonant modules 620 are configured, and the thin films 6222 in the multiple resonant modules 620 are independently configured; at least some of the thin films 6222 have different tension and / or thickness, so that the resonant module 620 is no longer limited to the noise reduction capability of a single frequency or narrow frequency band, so that the resonant module 620 can have a good noise reduction effect on noise in different frequency bands.

[0059] Multiple resonant modules 620 are arranged around the axis of the silencing shell 610 to make full use of the internal space of the silencing shell 610. This allows for the installation of as many resonant modules 620 as possible without affecting other performance characteristics of the outdoor unit of the air conditioner. Furthermore, both sides of the diaphragm 6222 can be in contact with the gas, increasing the contact area between the diaphragm 6222 and the gas, effectively utilizing the vibration energy dissipation characteristics of the diaphragm 6222, and further improving the noise reduction of the resonant modules 620.

[0060] Multiple resonant modules 620 can increase the effective surface area of ​​the thin film 6222 participating in the noise reduction effect, thereby increasing the noise reduction of the noise reduction component 600.

[0061] It should be noted that the resonant module 620 will obstruct airflow, therefore, it is not simply a matter of the more resonant modules 620 the better.

[0062] like Figures 6-8 As shown, the resonant module 620 includes a mounting bracket 621 for fixing the diaphragm 6222. The mounting bracket 621 is arranged along the length direction of the silencing shell 610, and the width direction of the mounting bracket 621 is arranged along the radial direction of the silencing shell 610. When the diaphragm 6222 is mounted on the mounting bracket 621, the length direction of the diaphragm 6222 is arranged along the length direction of the silencing shell 610, and the width direction of the diaphragm 6222 is arranged along the radial direction of the silencing shell 610, so that when the gas flows through the silencing shell 610, the surface of the diaphragm 6222 can contact the gas, thereby driving the vibration of the diaphragm 6222 with the sound energy carried by the gas, converting the sound energy into kinetic energy.

[0063] The multiple resonant modules 620 include multiple mounting brackets 621, which are arranged around the axis of the sound-absorbing shell 610. Each mounting bracket 621 is equipped with a thin film 6222. The thin films 6222 on different mounting brackets 621 are set independently so that the independent thin films 6222 on the mounting brackets 621 can respond to sound waves of different frequencies or intensities. This allows the entire resonant module 620 to cover a wider range of noise frequencies, thereby increasing the noise reduction effect.

[0064] In some embodiments, each resonant module 620 includes a mounting bracket 621. There are four resonant modules 620 and four mounting brackets 621 arranged in a cross shape so that the resonant modules 620 are arranged in a cross shape inside the silencing shell 610, so that the resonant modules 620 can fully contact the gas and the overall resonant modules 620 have a good silencing effect.

[0065] like Figure 9 As shown, a fixing member 630 is provided inside the silencing housing 610, and the fixing member 630 is located on the axis of the silencing housing 610; one end of the mounting bracket 621 in the width direction is connected to the fixing member 630, and the other end of the mounting bracket 621 in the width direction points to contact the inner wall of the silencing housing 610; multiple mounting brackets 621 are connected into one unit through the fixing member 630. After the mounting brackets 621 are connected into one unit, not only is the overall stability increased, and it can be easily installed inside the silencing housing 610, but it can also increase the firmness of the multiple resonant modules 620 installed inside the silencing housing 610.

[0066] In some embodiments, such as Figure 9As shown, the mounting bracket 621 includes a longitudinal beam 6211, the longitudinal beam 6211 being arranged along the length direction of the sound-absorbing shell 610.

[0067] Mounting bracket 621 includes crossbeams 6212, which are arranged radially along the length of the sound-absorbing shell 610. There are two crossbeams 6212, which are arranged opposite each other along the length of the sound-absorbing shell 610. The two crossbeams 6212 are connected to the two ends of the longitudinal beam 6211. One end of the crossbeam 6212 is connected to the longitudinal beam 6211, and the other end of the crossbeam 6212 is connected to the fixing member 630, so that the mounting bracket 621 is connected to the fixing member 630.

[0068] The longitudinal beam 6211, the fastener 630, and the two crossbeams 6212 together form a quadrilateral frame structure, and the membrane 6222 is located inside the quadrilateral frame structure.

[0069] In some embodiments, the longitudinal beam 6211, the fastener 630, and the two crossbeams 6212 are integrally formed to increase the connection strength between the longitudinal beam 6211, the fastener 630, and the two crossbeams 6212.

[0070] like Figure 10 As shown, the resonant module 620 includes a mounting frame 6221, which is detachably connected to the mounting bracket 621. The mounting frame 6221 is used to fix the diaphragm 6222. Multiple mounting frames 6221 are connected to each mounting bracket 621, and each mounting frame 6221 is fixed with its corresponding diaphragm 6222. The diaphragms 6222 on different mounting frames 6221 are set independently to allow each diaphragm 6222 to vibrate relatively independently, effectively avoiding the risk of mutual interference or overall structural resonance failure caused by vibration mode coupling, and improving the stability of the resonant module 620. Furthermore, when a diaphragm 6222 is damaged due to long-term vibration or accidental factors, only the corresponding mounting frame 6221 needs to be removed and the damaged diaphragm 6222 replaced, without scrapping the entire resonant module 620, reducing maintenance costs and difficulty. In addition, small diaphragms 6222 are easier to install than large diaphragms 6222. Setting multiple diaphragms 6222 for separate fixing can reduce the overall fixing difficulty of the diaphragms 6222.

[0071] At least a portion of the mounting frame 6221 is arranged along the length of the mounting bracket 621.

[0072] In some embodiments, the mounting frame 6221 is a quadrilateral frame structure, which not only facilitates the arrangement of multiple mounting frames 6221, but also facilitates the fixing of the film 6222.

[0073] In other embodiments, the mounting frame 6221 can be made of epoxy resin, and the size of the mounting frame 6221 is much smaller than the wavelength of the sound wave. The geometric dimensions of each mounting frame 6221 can be configured to meet the noise reduction requirements. , The wavelength of the sound wave.

[0074] like Figure 10 As shown, a mass block 6223 is provided on the membrane 6222. The mass block 6223 is located at the center of the membrane 6222. The mass block 6223 vibrates synchronously with the membrane 6222. The mass block 6223 is used to increase the vibration amplitude of the membrane 6222, thereby increasing the consumption of sound energy and thus increasing the noise reduction effect.

[0075] In some embodiments, mass blocks 6223 are provided on both sides of the film 6222 to increase the kinetic energy consumption of the mass blocks 6223.

[0076] In other embodiments, the mass block 6223 is cylindrical.

[0077] It should be noted that, for ease of description, a resonant module 620 includes a mounting frame 621 and multiple resonant units 622, with the multiple resonant units 622 mounted on the same mounting frame 621; a resonant unit 622 includes a mounting frame 6221, a thin film 6222 fixed on the mounting frame 6221, and a mass block 6223 disposed on the thin film 6222.

[0078] It should also be noted that since each resonant unit 622 has its own corresponding thin film 6222, the multiple thin films 6222 in multiple resonant units 622 can also be considered as multiple sets of thin films 6222.

[0079] Furthermore, it should be noted that although the inner diameter of the two ends of the silencing shell 610 is smaller than that of the middle part, the resonant module 620, which is located in the silencing shell 610, cannot be directly installed or removed from the opening 601. However, the silencing shell 610 can be designed as a split structure, so that the silencing shell 610 is split when the resonant module 620 is removed or placed. Alternatively, the mounting bracket 621, mounting frame 6221, etc., can be made of flexible materials, and the resonant module 620 can be removed or placed by deforming the mounting bracket 621 or mounting frame 6221. This is a conventional technology in the field and will not be described in detail here.

[0080] The silencing principle of the resonant module 620 utilizes local resonance and the negative equivalent mass density effect to attenuate sound waves of a specific frequency.

[0081] Local resonance silencing can be understood as follows: when the frequency of the incident sound wave is close to or equal to the local resonance frequency, the thin film 6222 and the mass block 6223 will resonate strongly. In the resonant state, the vibration amplitude of the mass block 6223 and the thin film 6222 reaches its maximum. The acoustic energy carried by the sound wave is efficiently converted into the kinetic energy of the thin film 6222 and the mass block 6223. Furthermore, the thin film 6222 material itself has internal friction damping; during repeated bending and deformation, the kinetic energy is dissipated as heat energy through molecular friction within the material.

[0082] The negative equivalent mass density effect can be understood as the special dynamic behavior exhibited by the entire unit 622 structure in response to external acoustic excitation near the local resonant frequency. When the acoustic wave drives the structure to vibrate, within a specific frequency range, the direction of the structure's acceleration may be opposite to the direction of the force applied by the acoustic wave, causing the incident acoustic wave to be either strongly reflected or rapidly attenuated and absorbed inside the structure.

[0083] The relationship between the relevant parameters of thin film 6222 and the resonant frequency of thin film 6222 is as follows:

[0084] In the formula, f0 is the first-order resonant frequency, a is the length of the thin film 6222, b is the width of the thin film 6222, T is the tension of the thin film 6222, ρ is the density of the thin film 6222, h is the thickness of the thin film 6222, and m is the mass of the mass block 6223.

[0085] In practical applications, when designing the resonant module 620, the size and form of the resonant unit 622 can be reasonably designed according to the requirements of the noise reduction frequency and noise reduction amount.

[0086] The resonant frequency and noise reduction coefficient of the resonant unit 622 can be adjusted according to the tension of the thin film 6222, the mass of the mass block 6223, and the thickness of the thin film 6222, thereby obtaining a wider noise reduction frequency and a higher noise reduction amount, thus improving the noise reduction performance of the noise reduction component 600.

[0087] In the aforementioned outdoor air conditioning unit, by designing the silencing component 600 to include a silencing shell 610 and a resonant module 620, not only can the silencing shell 610 and the resonant module 620 simultaneously perform silencing and noise reduction, increasing the effectiveness of the silencing component 600, but also, since one resonant module 620 includes multiple resonant units 622, allowing multiple resonant units 622 to be mounted on the same mounting bracket 621, it is possible to achieve differentiated settings for the diaphragm 6222 and the mass block 6223, such as different tension forces, thicknesses, and masses of the diaphragm 6222, thereby increasing the silencing frequency of the resonant unit 622. This means that the resonant unit 622 is no longer limited to silencing a single frequency band, thus increasing the silencing performance of the silencing component 600. Furthermore, when the diaphragm 6222 is damaged, only the damaged diaphragm 6222 can be replaced by removing the corresponding mounting frame 6221 from the mounting bracket 621.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0089] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: The casing includes an air inlet and an air outlet; An outdoor heat exchanger is located inside the casing; A fan is located inside the casing; by operating the fan, airflow is introduced into the casing from the air inlet, and after heat exchange by the outdoor heat exchanger, it is discharged from the casing through the air outlet. A compressor, disposed inside the housing, is used to compress low-pressure refrigerant into high-pressure refrigerant; the compressor includes: The intake pipe is used to supply low-pressure refrigerant into the compressor; The exhaust pipe is used to supply high-pressure refrigerant to flow out of the compressor; A muffler housing is provided on the exhaust pipe, and openings are provided at both ends of the muffler housing along its length to allow gaseous refrigerant to enter and exit the muffler housing; A resonant module is disposed within the anechoic shell; the resonant module includes: A thin film is provided along the length of the sound-absorbing shell; when gaseous refrigerant passes through the thin film, the thin film vibrates to convert sound energy into kinetic energy; The resonant modules are configured in multiple ways, and the thin films in the multiple resonant modules are configured independently of each other; at least some of the thin films have different tensions and / or thicknesses.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The resonant module includes a mounting bracket for fixing the diaphragm; the length direction of the mounting bracket is arranged along the length direction of the sound-absorbing shell; the width direction of the mounting bracket is arranged along the radial direction of the sound-absorbing shell.

3. The outdoor unit of the air conditioner according to claim 2, characterized in that, The plurality of resonant modules include a plurality of mounting brackets, which are arranged around the axis of the silencing shell; each mounting bracket is respectively mounted with a thin film, and the thin films on different mounting brackets are independently arranged.

4. The outdoor unit of the air conditioner according to claim 3, characterized in that, The silencing housing is provided with a fixing member located on the axis of the silencing housing; one end of the mounting bracket in the width direction is connected to the fixing member, and the other end of the mounting bracket in the width direction points to the inner wall of the silencing housing.

5. The outdoor unit of the air conditioner according to claim 2, characterized in that, The resonant module further includes a mounting frame for fixing the thin film; the mounting frame is connected to the mounting bracket; multiple mounting frames are provided, and multiple mounting frames are connected to the same mounting bracket; at least some of the mounting frames are arranged along the length direction of the mounting bracket.

6. The outdoor unit of the air conditioner according to claim 5, characterized in that, The films are set in a one-to-one correspondence with the mounting frames; the films on different mounting frames are set independently of each other.

7. The outdoor unit of the air conditioner according to claim 1, characterized in that, A mass block is provided on the film, the mass block is located at the center of the film, and the mass block vibrates synchronously with the film.

8. The outdoor unit of the air conditioner according to claim 7, characterized in that, The relationship between the resonant frequency of the thin film and the parameters of the thin film is as follows: In the formula, f0 is the first-order resonant frequency, a is the length of the film, b is the width of the film, T is the tension of the film, ρ is the density of the film, h is the thickness of the film, and m is the mass of the mass block.

9. The outdoor unit of the air conditioner according to claim 1, characterized in that, The dimensions at both ends of the sound-absorbing shell along its length are smaller than the dimensions of the middle portion of the sound-absorbing shell.

10. An outdoor unit for an air conditioner, characterized in that, include: The casing includes an air inlet and an air outlet; An outdoor heat exchanger is located inside the casing; A fan is located inside the casing; by operating the fan, airflow is introduced into the casing from the air inlet, and after heat exchange by the outdoor heat exchanger, it is discharged from the casing through the air outlet. A compressor, disposed inside the housing, is used to compress low-pressure refrigerant into high-pressure refrigerant; the compressor includes: The intake pipe is used to supply low-pressure refrigerant into the compressor; The exhaust pipe is used to supply high-pressure refrigerant to flow out of the compressor; A muffler housing, which is located on the exhaust pipe, is used to muffle the gas discharged from the compressor; A resonant module is disposed within the anechoic shell; the resonant module includes: A thin film, wherein the thin film is disposed along the length direction of the sound-absorbing shell; When the gaseous refrigerant passes through the membrane, the membrane vibrates to convert acoustic energy into kinetic energy.

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