Pipe silencers, air conditioners and their control methods

Abstract

This invention provides a pipeline silencer, an air conditioner, and a control method thereof. The pipeline silencer includes: a silencer housing, comprising a cylindrical body and a first end plate and a second end plate located at opposite ends of the cylindrical body. An inlet pipe and an outlet pipe are formed on the first end plate, and the second end plate is a sealing plate. The cylindrical body, the first end plate, and the second end plate together form a receiving cavity. A partition plate is placed within the receiving cavity, dividing the receiving cavity into two independent chambers: a first chamber and a second chamber. The first chamber is connected to the inlet pipe and the outlet pipe. The position of the partition plate can be driven to slide and adjust to change the volume of the first and second chambers. This invention can actively adjust the silencer's silencing frequency by changing the effective axial length of the silencer cavity. Compared to a simple expansion chamber silencer, the silencing performance is significantly improved. It can effectively solve the problem of noise transmission in the air conditioner's indoor unit caused by compressor operation. The structure is simple, compact, and has good sealing performance.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a pipeline silencer, an air conditioner, and a control method thereof. Background Technology

[0002] During air conditioner operation, the compressor continuously compresses the refrigerant, converting electrical energy into internal and kinetic energy. The internal energy enables the air conditioner to cool or heat, while the kinetic energy drives the refrigerant to flow through the condenser, evaporator, and pipes. Because the compressor operates intermittently and periodically, the refrigerant pressure and velocity in the piping system exhibit a pulsed pattern, which manifests as noise in the indoor unit.

[0003] To address this issue, most air conditioner piping systems incorporate simple expansion chamber silencers. However, traditional pipe silencers have fixed structures and performance, preventing adjustable noise reduction frequencies. For example, patent CN216744872U, entitled "Single-sided Inlet / Outlet Silencer for Air Conditioning Pipelines," seals one end of the silencer and places the pipe inlet and outlet within a constricted tube on the other side. This increases the sound transmission path within the silencer, improving noise reduction. However, this constricted structure is irregular, making it difficult to manufacture, and its fixed structure means the noise reduction frequency and performance are not adjustable. Patent CN209208401, entitled "Air Conditioner Silencer," places the inlet and outlet on the same side of the silencer housing. The refrigerant enters the housing cavity through the inlet pipe, where its pressure is released, and then it exits through the outlet on the same side. The longer flow path of the refrigerant within the housing effectively attenuates pressure pulsations, reducing the flow noise generated by the refrigerant in the piping. However, this... In one technical solution, the muffler's silencing frequency band and silencing performance are not adjustable, and regenerated noise may be generated inside the muffler. A patent with publication number CN204227665U, entitled "A Muffler for Automotive Air Conditioning Pipelines," places the muffler's inlet and outlet on the same side, effectively reducing flow noise in the pipeline and improving the comfort of the vehicle's air conditioning system. However, its silencing frequency and silencing performance are not adjustable. A patent with publication number CN219014478U, entitled "Muffler and Air Conditioner," designs the muffler cavity in an arc shape to be close to the compressor, reducing space occupation. It places the inlet and outlet on the same side of the cavity and uses an internal pipe insertion method. However, its muffler cavity has an irregular shape, making it difficult to manufacture, and its silencing frequency and silencing performance are also not adjustable.

[0004] In practical applications, the pulse pattern of refrigerant pressure and velocity changes with the compressor's operating frequency. Therefore, the noise transmitted in the indoor unit also varies, and the aforementioned single-sided inlet and outlet mufflers cannot effectively solve the problem of varying noise transmission. Summary of the Invention

[0005] Therefore, the present invention provides a pipeline silencer, an air conditioner and its control method, which can solve the technical problem that the silencing frequency and silencing performance of the existing single-sided inlet silencer are not adjustable, and cannot effectively solve the problem of changes in transmitted sound.

[0006] To address the above problems, the present invention provides a pipeline silencer, comprising:

[0007] The muffler housing includes a cylindrical body and a first end plate and a second end plate located at both ends of the cylindrical body. An inlet pipe and an outlet pipe are formed on the first end plate, and the second end plate is a sealing plate. The cylindrical body, the first end plate and the second end plate together form a receiving cavity.

[0008] A partition is placed inside the receiving cavity, dividing the receiving cavity into a first cavity and a second cavity that are independent of each other. The first cavity is connected to the inlet pipe and the outlet pipe. The position of the partition can be driven to slide and adjust to change the volume of the first cavity and the second cavity.

[0009] In some implementations...

[0010] It also includes a partition sliding drive device, which is disposed on the outside of the cylinder. The partition sliding drive device can reciprocate along the length of the cylinder, and the partition sliding drive device drives the partition to reciprocate by magnetic attraction.

[0011] In some embodiments, the partition sliding drive device includes:

[0012] A drive motor is connected to a first guide rail, which is connected to the outside of the muffler housing;

[0013] The first magnetic component is connected to the drive motor;

[0014] A second magnetic element is connected to the partition plate, and there is a magnetic attraction between the first magnetic element and the second magnetic element.

[0015] In some implementations...

[0016] The first magnetic component and the second magnetic component are concentric rings.

[0017] In some implementations...

[0018] An annular groove is formed on the outer circumferential wall of the partition, and a convex ring is formed on the annular inner wall of the second magnetic component, the convex ring being inserted into the annular groove.

[0019] In some implementations...

[0020] The second magnetic component is formed by combining multiple arc segments.

[0021] In some implementations...

[0022] The outer side of the muffler housing is also connected to a plurality of second guide rails. The first guide rail and each of the second guide rails are arranged in parallel and spaced around the central axis of the cylinder, and each of the second guide rails passes through the first magnetic component to guide the sliding of the first magnetic component.

[0023] In some implementations...

[0024] The first end plate has a plurality of first connecting blocks that protrude radially outward on its outer circumferential wall, and the second end plate has a plurality of second connecting blocks that protrude radially outward on its outer circumferential wall. The two ends of the first guide rail and each of the second guide rails are respectively connected to the oppositely arranged first connecting blocks and second connecting blocks.

[0025] In some implementations...

[0026] The cylinder body has a connecting flow channel, which has a first port and a second port. The first port is located in the first cavity and is adjacent to the first end plate, and the second port is located in the second cavity and is adjacent to the second end plate.

[0027] In some implementations...

[0028] The first end plate is provided with a first limiting block on its inner side inside the first cavity. The height of the first limiting block in the sliding direction of the partition is not less than the maximum distance between the first port and the inner side of the first end plate. The second end plate is provided with a second limiting block on its inner side inside the second cavity. The height of the second limiting block in the sliding direction of the partition is not less than the maximum distance between the second port and the inner side of the second end plate.

[0029] The present invention also provides an air conditioner including the above-mentioned pipe silencer.

[0030] The present invention also provides a control method for an air conditioner as described above, comprising the following steps:

[0031] Obtain the real-time operating frequency of the compressor in the air conditioner;

[0032] The transmission frequency corresponding to the real-time operating frequency is obtained according to the real-time operating frequency, and the driving parameters of the drive motor are matched according to the transmission frequency.

[0033] The drive motor is driven to move linearly to a preset position according to the drive parameters.

[0034] This invention provides a pipeline silencer, an air conditioner, and a control method thereof, which have the following characteristics:

[0035] Beneficial effects:

[0036] The position of the baffle can be driven to slide and adjust, thereby changing the volume of the first and second chambers, especially the volume of the first chamber. The variable volume of the first chamber can adjust the silencing frequency and silencing performance of the silencer. Thus, the pipeline silencer of the present invention can actively adjust the silencing frequency of the silencer by changing the effective axial length of the silencer cavity. Compared with the simple expansion chamber silencer, the silencing performance is greatly improved. It can effectively solve the problem of sound transmission in the air conditioner indoor unit caused by the operation of the compressor. The structure is simple, compact and has good sealing performance.

[0037] The partition sliding drive device uses magnetic attraction to drive the partition to slide. This non-contact driving method makes the assembly of the corresponding partition sliding drive device more flexible and convenient.

[0038] The structure design can be simplified by using the first and second magnetic components arranged in a ring and concentrically. At the same time, the concentric magnetic components have a larger relative area, which can ensure that the magnetic field strength between them is sufficient, thereby ensuring the reliability of the magnetic attraction driving force.

[0039] The connecting channel links the silencer cavities on both sides of the partition, namely the first and second cavities mentioned above. This allows the cooling medium to flow freely within the silencer cavities on both sides of the partition, balancing the pressure difference between the cavities on both sides of the partition when it moves, and ensuring that the partition moves smoothly under the drive of the motor. Attached Figure Description

[0040] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0041] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0042] Figure 1 This is a three-dimensional structural diagram of the pipeline silencer according to an embodiment of the present invention;

[0043] Figure 2 for Figure 1 Exploded view of the structure of the pipeline silencer in the diagram;

[0044] Figure 3 for Figure 1 The front view;

[0045] Figure 4 for Figure 3 Cross-sectional view of CC in China;

[0046] Figure 5 This is a control flowchart of an air conditioner control method according to another embodiment of the present invention;

[0047] Figure 6 This is a simulation comparison of the sound transmission loss of Embodiment 1 and Comparative Example 1 at different compressor real-time operating frequencies.

[0048] Figure 7 This is a simulation comparison of the sound transmission loss of Embodiment 2 and Comparative Example 2 at different real-time operating frequencies of the compressor.

[0049] Figure 8 This is a simulation comparison of the sound transmission loss of Embodiment 3 and Comparative Example 3 at different real-time operating frequencies of the compressor.

[0050] The reference numerals in the attached figures are as follows:

[0051] 11. Cylinder; 111. Flow channel; 1111. First port; 1112. Second port; 12. First end plate; 121. Inlet pipe; 122. Outlet pipe; 123. First limiting block; 13. Second end plate; 131. Second limiting block; 141. First connecting block; 142. Second connecting block; 2. Partition; 21. Annular groove; 31. Drive motor; 311. First guide rail; 312. Second guide rail; 313. Connecting bolt; 32. First magnetic component; 33. Second magnetic component; 331. Protruding ring. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0056] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0059] See also Figure 1 and Figure 8 As shown, according to an embodiment of the present invention, a pipeline silencer is provided, comprising:

[0060] The muffler housing (not labeled in the figure) includes a cylindrical body 11 and a first end plate 12 and a second end plate 13 located at both ends of the cylindrical body 11. An inlet pipe 121 and an outlet pipe 122 are formed on the first end plate 12. The second end plate 13 is a sealing plate. In a preferred embodiment, the aforementioned second end plate 13 is integrally formed with one end of the cylindrical body 11, that is, the second end plate 13 and the cylindrical body 11 are an integral structure. The cylindrical body 11, the first end plate 12 and the second end plate 13 together form a receiving cavity (not labeled in the figure).

[0061] A partition 2 is placed within the accommodating cavity, dividing it into a first cavity and a second cavity that are independent of each other. This independence means that the first cavity and the second cavity do not form a connection at least at the partition 2. The first cavity is connected to the inlet pipe 121 and the outlet pipe 122. Therefore, the pipe silencer of this invention is objectively a single-sided inlet / outlet pipe silencer. The position of the partition 2 can be driven to slide and adjust to change the volume of the first cavity and the second cavity. In specific applications, the aforementioned pipe silencer is connected in series to the refrigerant pipeline of an air conditioner via the inlet pipe 121 and the outlet pipe 122. That is, the inlet pipe 121 and the outlet pipe 122 are respectively connected to the refrigerant pipeline of the air conditioner to eliminate transmitted noise generated within the refrigerant pipeline.

[0062] In this technical solution, the position of the partition 2 can be driven to slide and adjust, thereby changing the volume of the first cavity and the second cavity, especially the volume of the first cavity. The variable volume of the first cavity can adjust the silencing frequency and silencing performance of the silencer. Thus, the pipeline silencer of the present invention can actively adjust the silencing frequency of the silencer by changing the effective axial length of the silencer cavity (i.e., the aforementioned first cavity). Compared with the simple expansion chamber silencer, the silencing performance is greatly improved. It can efficiently solve the problem of sound transmission in the air conditioner indoor unit caused by the operation of the compressor. The structure is simple, compact and has good sealing performance.

[0063] It should be noted that the pipeline silencer in this invention has a single-sided inlet and outlet structure, which can effectively increase the flow path and flow time of the airflow (refrigerant) in the first cavity while keeping the axial length of the first cavity unchanged, thus significantly improving the silencing effect.

[0064] In some embodiments, a partition sliding drive device (not indicated in the figure) is also included. The partition sliding drive device is disposed on the outside of the cylinder 11. The partition sliding drive device is capable of reciprocating along the length direction of the cylinder 11, and the partition sliding drive device drives the partition 2 to reciprocate by magnetic attraction.

[0065] This technical solution provides a sliding drive method for the partition 2. Specifically, the partition sliding drive device in this invention uses magnetic attraction to drive the partition 2 to slide. This non-contact drive method makes the assembly of the corresponding partition sliding drive device more flexible and convenient.

[0066] In one specific embodiment, the partition sliding drive device includes:

[0067] A drive motor 31 is connected to a first guide rail 311 and can move along the guide direction of the first guide rail 311 by its own driving force. The first guide rail 311 is connected to the outside of the muffler housing. A first magnetic element 32 is connected to the drive motor 31 and drives the first magnetic element 32 to move synchronously in a straight line when the drive motor 31 moves. A second magnetic element 33 is connected to the partition 2 and there is a magnetic attraction between the first magnetic element 32 and the second magnetic element 33. When the first magnetic element 31 slides with the drive motor 31, the second magnetic element 33 will drive the partition 2 connected to it to slide synchronously under the action of the magnetic attraction. In a preferred embodiment, the first magnetic element 32 and the second magnetic element 33 are concentric rings. The first magnetic element 32 can be a permanent magnet ring, and the second magnetic element 32 can also be a permanent magnet ring, only the magnetism on opposite sides is opposite.

[0068] In this technical solution, the first magnetic element 31 and the second magnetic element 32, which are arranged in a ring and concentrically, can simplify the structural design. At the same time, the concentrically arranged magnetic elements have a larger relative area, which can ensure that the magnetic field strength between them is sufficient, thereby ensuring the reliability of the magnetic attraction driving force.

[0069] See Figure 2 As shown, in a preferred embodiment, the aforementioned annular first magnetic element 31 has a notch, and the drive motor 31 is connected to the first magnetic element 31 by a connecting bolt 313, and the drive motor 31 is located within the notch.

[0070] See further Figure 2 As shown, an annular groove 21 is formed on the outer circumferential wall of the partition 2, and a protruding ring 331 is formed on the annular inner wall of the second magnetic component 33. The protruding ring 331 is inserted into the annular groove 21.

[0071] In this technical solution, the partition 2 and the second magnetic component 33 are reliably connected through the insertion relationship between the convex ring 331 and the annular groove 21. As a preferred implementation, a corresponding sealing ring is also provided between the outer circumferential wall of the second magnetic component 33 and the inner wall surface of the cylinder 11 to improve the separation effect of the partition 2 between the first cavity and the second cavity.

[0072] In a preferred embodiment, the second magnetic element 33 is formed by assembling multiple arc segments, such as... Figure 2 As shown, the second magnetic component 33 has four identical arc segments that are assembled to form a ring structure. This method of assembling multiple arc segments facilitates the assembly of the second magnetic component 33 with the partition 2. At the same time, it should be emphasized that when the second magnetic component 33 is a permanent magnet, it will be a vulnerable component. The method of assembling multiple arc segments in this technical solution allows for individual replacement when any one of them is damaged, reducing maintenance and usage costs.

[0073] In some embodiments, a plurality of second guide rails 312 are also connected to the outer side of the muffler housing. The first guide rail 311 and each of the second guide rails 312 are arranged parallel to each other around the central axis of the cylinder 11, and each of the second guide rails 312 passes through the first magnetic element 32 to guide the sliding of the first magnetic element 32, such as... Figure 2 As shown, in a specific embodiment, three of the aforementioned second guide rails 312 are provided, and the three second guide rails 312 and one of the aforementioned first guide rails 311 are evenly spaced on the outside of the cylinder 11.

[0074] In this technical solution, the first guide rail 311 and multiple second guide rails 312 together guide the sliding direction of the first magnetic component 32, ensuring the smoothness and reliability of the first magnetic component 32 during movement. It is understood that the aforementioned second guide rail 312 is specifically a smooth rod. In a specific embodiment, the aforementioned first guide rail 311 can specifically be a lead screw. The corresponding drive motor 31 drives the corresponding lead screw nut to rotate. The lead screw and lead nut are threaded together, and when the lead screw nut rotates, it drives the drive motor 31 to move, thereby causing the aforementioned first magnetic component 32 to slide.

[0075] In some embodiments, the outer circumferential wall of the first end plate 12 has a plurality of first connecting blocks 141 protruding radially outward, and the outer circumferential wall of the second end plate 13 has a plurality of second connecting blocks 142 protruding radially outward. When the second end plate 13 and the cylinder 11 are integrally formed, the second connecting blocks 142 are also integrally formed with the cylinder 11. The two ends of the first guide rail 311 and each of the second guide rails 312 are respectively connected to the oppositely arranged first connecting blocks 141 and second connecting blocks 142.

[0076] In this technical solution, the first connecting block 141 and the second connecting block 142 together form an end support connection for the first guide rail 311 and each of the second guide rails 312, which facilitates the assembly of the muffler.

[0077] See details Figure 4 As shown, in some embodiments, the cylindrical body 11 has a connecting flow channel 111, which has a first port 1111 and a second port 1112. The first port 1111 is located in the first cavity and is adjacent to the first end plate 12, and the second port 1112 is located in the second cavity and is adjacent to the second end plate 13. Multiple connecting flow channels 111 are provided, and these multiple connecting flow channels 111 are spaced apart around the central axis of the cylindrical body 11.

[0078] In this technical solution, the aforementioned connecting channel 111 connects the silencer cavities on both sides of the partition 2, namely the first cavity and the second cavity, so that the cold medium can flow freely in the silencer cavities on both sides of the partition 2 to balance the pressure difference between the cavities on both sides of the partition 2 when the partition 2 moves, and ensure that the partition 2 moves smoothly under the drive of the drive motor 31.

[0079] See further Figure 4As shown, in a preferred embodiment, the first end plate 12 is provided with a first limiting block 123 on its inner side inside the first cavity, and the height of the first limiting block 123 in the sliding direction of the partition 2 is not less than the maximum distance between the first port 1111 and the inner side of the first end plate 12; the second end plate 13 is provided with a second limiting block 131 on its inner side inside the second cavity, and the height of the second limiting block 131 in the sliding direction of the partition 2 is not less than the maximum distance between the second port 1112 and the inner side of the second end plate 13.

[0080] In this technical solution, the aforementioned first limiting block 123 and second limiting block 131 are used to prevent the partition 2 and the second magnetic component 33 from blocking the first port 1111 and the second port 1112 under the drive of the drive motor 31, thereby ensuring the pressure balance function of the aforementioned connecting flow channel 111.

[0081] According to an embodiment of the present invention, an air conditioner is also provided, including the aforementioned pipe silencer. The position of the baffle 2 in the pipe silencer can be driven to slide and adjust, thereby changing the volume of the first cavity and the second cavity, especially adjusting the volume of the first cavity. The variable volume of the first cavity can adjust the silencing frequency and silencing performance of the silencer, thereby enabling the pipe silencer of the present invention to actively adjust the silencing frequency of the silencer by changing the effective axial length of the silencer cavity (i.e., the aforementioned first cavity). Compared with a simple expansion chamber silencer, the silencing performance is greatly improved, which can effectively solve the problem of noise transmission in the indoor unit of the air conditioner caused by the operation of the compressor. The structure is simple, compact, and has good sealing performance.

[0082] According to an embodiment of the present invention, a control method for an air conditioner as described above is also provided, comprising the following steps:

[0083] Obtain the real-time operating frequency of the compressor in the air conditioner;

[0084] The transmission frequency corresponding to the real-time operating frequency is obtained according to the real-time operating frequency, and the driving parameters of the drive motor 31 are matched according to the transmission frequency.

[0085] The drive motor 31 is driven to move linearly to a preset position according to the drive parameters.

[0086] See details Figure 5As shown, when the compressor operating frequency changes, the drive motor chip identifies the current compressor operating frequency (i.e., the aforementioned real-time operating frequency). It then locks the transmitted sound frequency in the transmitted sound database (a database of corresponding compressor operating frequencies and transmitted sounds, pre-loaded into the chip) based on the compressor operating frequency. According to this noise frequency, it matches the muffler noise reduction database (a database of corresponding noise frequencies and drive parameters, pre-loaded into the chip) to obtain the drive motor parameters. Here, the drive parameters refer to the distance from the bottom surface (i.e., the inner surface) of the first end plate 12 of the muffler to the side of the partition 2 near the first end plate 12, also known as the effective height of the muffler cavity. In other words, the technical solution of this invention, through the motor chip built into the drive motor and maintaining communication with the air conditioner outdoor unit control chip, actively identifies the compressor operating frequency, retrieves the noise data stored inside the motor chip, and adjusts the drive motor to drive the partition to the corresponding position according to the noise frequency, thereby achieving maximum noise reduction by the muffler.

[0087] The aforementioned preset position is also the position of the distance between the partition 2 and the first end plate 12 corresponding to different operating frequencies.

[0088] It should be noted that in this invention, by mapping and matching the positional relationship of the baffles 2 corresponding to different operating frequencies of the compressor in advance, when the operating frequency of the compressor changes, the drive motor 31 is controlled to move to achieve precise adjustment of the position of the baffles 2, resulting in superior noise reduction performance.

[0089] See Figures 6 to 8 The simulation results show that each comparative example is a simple expansion chamber silencer. The inlet and outlet radii of the silencers in each comparative example and embodiment are 4.9 mm, and the diameter of the silencer cavity is 12 mm. The length of the silencer cavity in each embodiment and comparative example (specifically, the length of each accommodating cavity in the comparative example and the maximum length of the first cavity in the embodiment) is consistent.

[0090] Each comparative example is a simple expansion chamber silencer, meaning the cavity length of each silencer is fixed. Specifically, the cavity length in Comparative Example 1 is 120mm, in Comparative Example 2 it is 90mm, and in Comparative Example 3 it is 60mm. The length of each first cavity in each embodiment is adjustable, with maximum lengths of 120mm, 90mm, and 60mm, respectively. Simulation results show that, with the same cavity length, the variable-length pipeline silencer of the present invention has a greater silencing effect.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pipeline silencer, characterized in that, include: The muffler housing includes a cylindrical body (11) and a first end plate (12) and a second end plate (13) located at both ends of the cylindrical body (11). An inlet pipe (121) and an outlet pipe (122) are formed on the first end plate (12), and the second end plate (13) is a sealing plate. The cylindrical body (11), the first end plate (12) and the second end plate (13) together form a receiving cavity. A partition (2) is placed inside the accommodating cavity. The partition (2) divides the accommodating cavity into a first cavity and a second cavity that are independent of each other. The first cavity is connected to the inlet pipe (121) and the outlet pipe (122). The position of the partition (2) can be driven to slide and adjust to change the volume of the first cavity and the second cavity. The cylinder (11) has a connecting channel (111) inside. The connecting channel (111) has a first port (1111) and a second port (1112). The first port (1111) is located in the first cavity and is located near the first end plate (12). The second port (1112) is located in the second cavity and is located near the second end plate (13).

2. The pipeline silencer according to claim 1, characterized in that, It also includes a partition sliding drive device, which is located on the outside of the cylinder (11). The partition sliding drive device can reciprocate along the length of the cylinder (11), and the partition sliding drive device drives the partition (2) to reciprocate through magnetic attraction.

3. The pipeline silencer according to claim 2, characterized in that, The partition sliding drive device includes: A drive motor (31) is connected to a first guide rail (311), which is connected to the outside of the muffler housing; The first magnetic component (32) is connected to the drive motor (31); The second magnetic element (33) is connected to the partition (2), and there is a magnetic attraction between the first magnetic element (32) and the second magnetic element (33).

4. The pipeline silencer according to claim 3, characterized in that, The first magnetic element (32) and the second magnetic element (33) are concentric rings.

5. The pipeline silencer according to claim 4, characterized in that, An annular groove (21) is formed on the outer circumferential wall of the partition (2), and a convex ring (331) is formed on the annular inner wall of the second magnetic component (33), and the convex ring (331) is inserted into the annular groove (21).

6. The pipeline silencer according to claim 5, characterized in that, The second magnetic component (33) is formed by combining multiple arc segments.

7. The pipeline silencer according to claim 4, characterized in that, The outer side of the muffler housing is also connected to a plurality of second guide rails (312). The first guide rail (311) and each of the second guide rails (312) are arranged parallel to each other around the central axis of the cylinder (11), and each of the second guide rails (312) passes through the first magnetic element (32) to guide the sliding of the first magnetic element (32).

8. The pipeline silencer according to claim 7, characterized in that, The outer circumferential wall of the first end plate (12) has a plurality of first connecting blocks (141) that protrude outward along its radial direction, and the outer circumferential wall of the second end plate (13) has a plurality of second connecting blocks (142) that protrude outward along its radial direction. The two ends of the first guide rail (311) and each of the second guide rails (312) are respectively connected to the oppositely arranged first connecting blocks (141) and second connecting blocks (142).

9. The pipeline silencer according to claim 1, characterized in that, The first end plate (12) is provided with a first limiting block (123) on its inner side inside the first cavity. The height of the first limiting block (123) in the sliding direction of the partition (2) is not less than the maximum distance between the first port (1111) and the inner side of the first end plate (12). The second end plate (13) is provided with a second limiting block (131) on its inner side inside the second cavity. The height of the second limiting block (131) in the sliding direction of the partition (2) is not less than the maximum distance between the second port (1112) and the inner side of the second end plate (13).

10. An air conditioner, characterized in that, The pipeline silencer includes any one of claims 3 to 8.

11. A control method for an air conditioner as described in claim 10, characterized in that, Includes the following steps: Obtain the real-time operating frequency of the compressor in the air conditioner; The transmission frequency corresponding to the real-time operating frequency is obtained according to the real-time operating frequency, and the driving parameters of the drive motor (31) are matched according to the transmission frequency. The drive motor (31) is driven to move linearly to a preset position according to the drive parameters.

Images