silencers and air conditioners

Abstract

This application provides a muffler and an air conditioner. The muffler includes: a cylindrical body with a silencing cavity inside; a first adjusting part, which is a hollow structure with both ends connected through it. The outer wall of the first adjusting part is movably connected to the inner wall of the cylindrical body along the axial direction, thereby adjusting the volume of the silencing cavity; and an extension tube, one end of which extends from the first adjusting part into the silencing cavity. The extension tube is movably connected to the first adjusting part along the axial direction of the cylindrical body, thereby adjusting the length of the extension tube extending into the silencing cavity. With this configuration, the muffler can adjust the length of the silencing cavity by changing the relative position of the first adjusting part and the cylindrical body, and also adjust the length of the extension tube extending into the silencing cavity by changing the relative position of the extension tube and the first adjusting part, significantly improving the flexibility of the muffler and widening its silencing frequency range.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and in particular to a silencer and an air conditioner. Background Technology

[0002] Vibration and noise of the outdoor unit of an air conditioner are important indicators for evaluating the quality of the air conditioner and affecting the user's comfort experience. The compressor is one of the main sources of vibration and noise in the outdoor unit. Therefore, in order to reduce the noise of refrigerant flow and the transmission of sound caused by structural vibration, a silencer is usually installed in the pipes of the air conditioner compressor during the design process.

[0003] In related technologies, the silencing performance and silencing frequency of a muffler are generally changed by adjusting the length of its silencing chamber or the depth to which the trachea is inserted into the muffler. However, this approach limits the adjustable range of the muffler's silencing frequency, lacks flexibility, and consequently affects its silencing performance. Utility Model Content

[0004] In view of this, this application provides a silencer and an air conditioner that can broaden the silencer's silencing frequency range and improve the silencer's flexibility.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, this application provides a muffler, the muffler comprising:

[0007] The cylindrical body has a sound-absorbing cavity inside;

[0008] The first adjustment part is a hollow structure that extends through both ends. The outer wall of the first adjustment part is movably connected to the inner wall of the cylinder along the axial direction of the cylinder, thereby enabling the adjustment of the volume of the silencing cavity.

[0009] An insertion tube is provided, one end of which extends from the first adjustment part into the silencing cavity. The insertion tube is movably connected to the first adjustment part along the axial direction of the cylinder, thereby allowing adjustment of the length of the insertion tube extending into the silencing cavity.

[0010] In the technical solution of this application, since the first adjusting part is movably connected to the cylinder along the axial direction of the cylinder, and the insertion pipe is movably connected to the first adjusting part along the axial direction of the cylinder, the silencer can adjust the length of the silencing cavity by changing the relative position of the first adjusting part and the cylinder, and can also adjust the length of the insertion pipe extending into the silencing cavity by changing the relative position of the insertion pipe and the first adjusting part. This significantly improves the flexibility of the silencer, broadens the silencing frequency range of the silencer, and enables the silencer to be adjusted according to different silencing requirements, thereby adapting to more different working conditions and improving the applicability of the silencer.

[0011] In one possible implementation, the cylinder is threadedly connected to the first adjusting part, and the first adjusting part is threadedly connected to the extension tube.

[0012] In the technical solution of this application, by means of threaded connection, the first adjusting part and the cylinder, and the first adjusting part and the extension tube can remain locked without relative movement without rotating the first adjusting part, thus ensuring the stability of the muffler; and the volume of the muffler cavity and the length of the extension tube extending into the muffler cavity can be continuously changed, which is conducive to more precise adjustment of the length of the extension tube extending into the muffler cavity and improving the adjustment accuracy of the muffler.

[0013] In one possible implementation, the cylinder is provided with an internal thread, the insertion tube is provided with an external thread, and the first adjusting part is provided with both an external thread and an internal thread. The external thread of the first adjusting part is used to engage with the internal thread of the cylinder, and the internal thread of the first adjusting part is used to engage with the external thread of the insertion tube.

[0014] In the technical solution of this application, the first adjustment part uses its first external thread and second internal thread to cooperate with the cylinder and the insertion tube respectively, ensuring the coaxiality of the first adjustment part, the cylinder and the insertion tube and avoiding eccentricity; in addition, the double thread coupling design of the first adjustment part makes the structure of the muffler more compact, which helps to save the space occupied by the muffler.

[0015] In one possible implementation, the thread direction between the cylinder and the first adjusting part is the same as the thread direction between the first adjusting part and the extension tube.

[0016] In the technical solution of this application, by setting the thread direction between the cylinder and the first adjustment part to be the same as the thread direction between the first adjustment part and the extension tube, the volume of the muffler cavity and the extension length of the extension tube can be quickly and correlatedly adjusted, so that the volume of the muffler cavity and the extension length of the extension tube increase or decrease at the same time, thereby improving the convenience of the muffler adjustment operation and the efficiency of parameter adjustment.

[0017] In one possible implementation, the first adjusting section includes a first connecting section, a first expanding section, and a first mating section connected in sequence. The first connecting section is connected to the insertion tube, and the first mating section is connected to the cylinder. The inner diameter of the first mating section is larger than the inner diameter of the first connecting section, and the inner diameter of the first expanding section gradually increases from the end near the first connecting section to the end near the first mating section.

[0018] In the technical solution of this application, the inner diameter of the first expansion section gradually increases from the first end to the second end of the cylinder. While achieving a uniform transition between the first connecting section and the first mating section, the cross-sectional expansion of the first expansion section creates a region of abrupt change in acoustic impedance, causing reflection and interference of sound waves, canceling out the sound energy of a specific frequency, thereby reducing the noise of the compressor pipeline system.

[0019] In one possible implementation, the muffler further includes a second adjustment section and an exhaust pipe;

[0020] A portion of the second adjustment part is located inside the cylinder. The second adjustment part is a hollow structure that extends through both ends. The inner wall of the first adjustment part, the inner wall of the cylinder, and the inner wall of the second adjustment part together form the silencing cavity. The second adjustment part is movably connected to the cylinder along the axial direction of the cylinder.

[0021] The air outlet pipe is connected to the end of the second adjustment part that is away from the first adjustment part.

[0022] In the technical solution of this application, the volume of the silencing cavity can be adjusted by the relative movement between the second adjustment part and the cylinder, thereby changing the silencing frequency range of the silencer; the silencer can adjust the volume of the silencing cavity and the insertion length of the insertion tube simultaneously by the first adjustment part, or adjust only the volume of the silencing cavity by the second adjustment part, or adjust the first adjustment part and the second adjustment part simultaneously, so as to realize the simultaneous bidirectional adjustment of the silencer, which is flexible and highly adaptable.

[0023] In one possible implementation, the second adjusting part is threadedly connected to the cylinder.

[0024] In the technical solution of this application, the cylinder and the second adjustment part have a threaded self-locking function. By adjusting the relative position between the cylinder and the second adjustment part using the threaded engagement, the volume of the muffler cavity can be continuously changed, which is beneficial to more accurately adjust the volume of the muffler cavity and improve the adjustment accuracy of the muffler.

[0025] In one possible implementation, the outer wall of the first adjustment part is provided with a first handle, and the outer wall of the second adjustment part is provided with a second handle, both of which are located outside the cylinder.

[0026] In the technical solution of this application, the first handle and the second handle provide gripping points for the operator, so that the operator does not need to use the tool housing to manually adjust the position of the first adjustment part and the second adjustment part, which improves the convenience of on-site operation and reduces the risk of pinching injury that may be caused by the operator touching the first adjustment part or the second adjustment part and other moving parts with bare hands.

[0027] In one possible implementation, the second adjusting section includes a second connecting section, a second expansion section, and a second mating section connected in sequence. The second connecting section is connected to the air outlet pipe, and the second mating section is connected to the cylinder. The inner diameter of the second mating section is larger than the inner diameter of the second connecting section, and the inner diameter of the second expansion section gradually increases from one end near the second connecting section to one end near the second mating section.

[0028] In the technical solution of this application, the second expansion section is trumpet-shaped, and the inner diameter of the second expansion section gradually increases from the second end to the first end of the cylinder. While achieving a uniform transition between the second connecting section and the second mating section, the cross-sectional expansion of the second expansion section creates a region of abrupt change in acoustic impedance, causing the reflection and interference of sound waves, canceling out the sound energy of a specific frequency, thereby reducing the noise of the compressor pipeline system.

[0029] Secondly, this application provides an air conditioner, which includes the silencer provided in any embodiment of the first aspect. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the muffler provided in the embodiments of this application;

[0032] Figure 2 for Figure 1 Sectional view along the middle AA direction;

[0033] Figure 3 A schematic diagram illustrating the length L1 of the silencing cavity and the extension length L2 of the insertion tube in the silencer provided in the embodiments of this application;

[0034] Figure 4 The diagram shows the relationship between sound transmission loss when the muffler provided in the embodiments of this application is in its original state, when the volume of the muffler cavity and the insertion length of the insertion tube are adjusted simultaneously, and when only the volume of the muffler cavity is adjusted.

[0035] Figure 5 This is a schematic diagram of the structure of the cylinder provided in an embodiment of this application;

[0036] Figure 6 A schematic diagram of the structure of the first adjustment part provided in an embodiment of this application;

[0037] Figure 7This is a schematic diagram of the structure of the insertion tube provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the structure of the second adjustment part provided in an embodiment of this application.

[0039] The reference numerals in the figure indicate:

[0040] 1-Cylinder body; 11-Silencer cavity; 12-First internal thread; 13-First through hole; 14-Second through hole;

[0041] 2-First adjusting section; 21-First connecting section; 211-Second internal thread; 22-First expansion section; 23-First mating section; 231-First external thread; 24-First handle;

[0042] 3-Insertion tube; 31-Second external thread;

[0043] 4-Second adjusting section; 41-Second connecting section; 411-Third internal thread; 42-Second expansion section; 43-Second mating section; 431-Third external thread; 44-Second handle;

[0044] 5-Exhaust pipe.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative relationships shown in the figures. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute directions. When the product is placed in different orientations, the orientation may change; for example, "up" and "down" may be interchanged.

[0048] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0049] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0050] Vibration and noise of the outdoor unit of an air conditioner are important indicators for evaluating the quality of the air conditioner and affecting the user's comfort experience. The compressor is one of the main sources of vibration and noise in the outdoor unit. Therefore, in order to reduce the noise of refrigerant flow and the transmission of sound caused by structural vibration, a silencer is usually installed in the pipes of the air conditioner compressor during the design process.

[0051] In related technologies, the silencing performance and silencing frequency of a muffler are generally changed by adjusting the length of its silencing chamber or the depth of the tracheal tube inserted into the muffler. However, this approach limits the range of adjustable silencing frequencies and lacks flexibility, thus affecting the muffler's silencing performance.

[0052] To address the aforementioned technical problems, this application provides a silencer and an air conditioner that can broaden the silencer's silencing frequency range and improve its flexibility.

[0053] like Figure 1 and Figure 2 As shown, the silencer provided in this embodiment includes a cylinder 1, a first adjustment part 2, and an extension tube 3.

[0054] For example, a silencer is applied to an air conditioner or other refrigeration and heating equipment with a compressor. This application embodiment uses the application of a silencer to an air conditioner as an example for illustration.

[0055] The cylinder 1 contains a silencing cavity 11. The first adjustment part 2 is a hollow structure with both ends open. The outer wall of the first adjustment part 2 is movably connected to the inner wall of the cylinder 1 along the axial direction, thereby allowing adjustment of the volume of the silencing cavity 11. One end of the insertion tube 3 extends from the first adjustment part 2 into the silencing cavity 11. The insertion tube 3 is movably connected to the first adjustment part 2 along the axial direction of the cylinder 1, thereby allowing adjustment of the length of the insertion tube 3 extending into the silencing cavity 11.

[0056] For example, cylinder 1 is a hollow cylindrical structure, please refer to... Figure 5 In the diagram, the vertical direction represents the length and axial direction of cylinder 1. The first end of cylinder 1 (i.e. Figure 5 The upper end of the middle cylinder 1 is provided with a first through hole 13, which is used to allow the first adjustment part 2 to be inserted. The first adjustment part 2 is connected to the first end of the cylinder 1, and at least a part of the first adjustment part 2 is located inside the cylinder 1.

[0057] like Figure 2 and Figure 6As shown, the first adjustment part 2 has openings at both the upper and lower ends. The inner wall of the first adjustment part 2 and the inner wall of the cylinder 1 form at least a partial silencing cavity 11. The inner wall of the first adjustment part 2 defines the boundary of the upper end of the silencing cavity 11.

[0058] The insertion pipe 3 is suitable for connection to the compressor's piping. For example, the insertion pipe 3 can be connected between the compressor's discharge pipe and the four-way valve, or between the four-way valve and the shut-off valve. The connection method between the insertion pipe 3 and the compressor piping can be welding, threaded fastener connection, etc. Please refer to [reference needed]. Figure 2 The insertion pipe 3 serves as the air intake pipe of the muffler. The upper end of the insertion pipe 3 is used to connect to the compressor's pipe, and the lower end of the insertion pipe 3 extends from the first adjustment part 2 into the muffler cavity 11.

[0059] Since the outer wall of the first adjustment part 2 is movably connected to the inner wall of the cylinder 1 along the axial direction of the cylinder 1, the first adjustment part 2 can move relative to the cylinder 1 along the axial direction of the cylinder 1, thereby changing the relative position of the first adjustment part 2 in the cylinder 1, and causing the length of the silencing cavity 11 in the axial direction of the cylinder 1 to change. In other words, by the relative movement between the first adjustment part 2 and the cylinder 1, the volume of the silencing cavity 11 can be adjusted, thereby changing the silencing frequency range of the silencer.

[0060] Since the insertion tube 3 is movably connected to the first adjustment part 2 along the axial direction of the cylinder 1, the relative position between the insertion tube 3 and the first adjustment part 2 can be changed, so that the length of the insertion tube 3 extending into the silencing cavity 11 changes, thereby changing the silencing frequency range of the silencer.

[0061] Figure 3 The length L1 of the silencing cavity 11 and the insertion length L2 of the insertion tube 3 are shown. Figure 4 The diagram illustrates the changes in sound transmission loss of the silencer provided in this embodiment under the following conditions: in its original state, when both the volume of the silencer cavity 11 and the insertion length of the insertion tube 3 are adjusted simultaneously, and when only the volume of the silencer cavity 11 is adjusted. Figure 4 The horizontal axis represents the frequency of the sound, measured in Hz (Hertz), and the vertical axis represents the transmission loss (or noise reduction) of the muffler, measured in dB (decibels). Figure 4 In the diagram, curve a represents the transmission loss variation curve of the muffler in its original state (i.e., when the length L1 of the muffler cavity 11 is 120 mm and the insertion length L2 of the insertion tube 3 is 20 mm); curve b represents the transmission loss variation curve of the muffler when the length L1 of the muffler cavity 11 decreases by 20 mm and the insertion length L2 of the insertion tube 3 increases by 20 mm; and curve c represents the transmission loss variation curve of the muffler when the length L1 of the muffler cavity 11 decreases by 20 mm and the insertion length L2 of the insertion tube 3 remains unchanged. According to... Figure 4It can be seen that the silencing frequency range corresponding to curve b is wider, and it has a better noise reduction effect for both low-frequency and high-frequency sounds. This proves that the silencer provided in this application embodiment, which can adjust both the volume of the silencing cavity 11 and the insertion length of the insertion tube 3, can broaden the silencing frequency range and adapt to more different working conditions.

[0062] The muffler provided in this application embodiment has the following advantages: the first adjusting part 2 is movably connected to the cylinder 1 along the axial direction of the cylinder 1, and the insertion tube 3 is movably connected to the first adjusting part 2 along the axial direction of the cylinder 1. Therefore, the muffler can adjust the length of the silencing cavity 11 by changing the relative position of the first adjusting part 2 and the cylinder 1, and it can also adjust the length of the insertion tube 3 extending into the silencing cavity 11 by changing the relative position of the insertion tube 3 and the first adjusting part 2. This significantly improves the flexibility of the muffler, broadens the silencing frequency range of the muffler, and enables the muffler to be adjusted according to different silencing requirements, thereby adapting to more different working conditions and improving the applicability of the muffler.

[0063] In some embodiments, the cylinder 1 is threadedly connected to the first adjusting part 2, and the first adjusting part 2 is threadedly connected to the extension tube 3.

[0064] The cylinder 1, the first adjusting part 2, and the extension tube 3 are all provided with threaded structures. The first adjusting part 2 is engaged with the cylinder 1 and the extension tube 3 respectively through the threaded structure to realize the movable connection between the first adjusting part 2 and the cylinder 1 and the threaded connection between the first adjusting part 2 and the extension tube 3.

[0065] For example, the thread helix angle between the cylinder 1 and the first adjusting part 2 is less than or equal to the equivalent friction angle, and the thread helix angle between the first adjusting part 2 and the extension tube 3 is less than or equal to the equivalent friction angle, thereby providing a thread self-locking function between the cylinder 1 and the first adjusting part 2, and between the first adjusting part 2 and the extension tube 3. Without rotating the first adjusting part 2, the first adjusting part 2 and the cylinder 1, and between the first adjusting part 2 and the extension tube 3, can remain locked without relative movement, ensuring the stability of the muffler.

[0066] Furthermore, by adjusting the relative position between the adjusting cylinder 1 and the first adjusting part 2 using a threaded connection, the volume of the muffler cavity 11 can be continuously varied, which facilitates more precise adjustment of the volume of the muffler cavity 11 and improves the adjustment accuracy of the muffler. Similarly, by adjusting the relative position between the first adjusting part 2 and the insertion tube 3 using a threaded connection, the length of the insertion tube 3 extending into the muffler cavity 11 can be continuously varied, which facilitates more precise adjustment of the length of the insertion tube 3 extending into the muffler cavity 11 and improves the adjustment accuracy of the muffler.

[0067] In some embodiments, the cylinder 1 is provided with an internal thread, the insertion tube 3 is provided with an external thread, and the first adjusting part 2 is provided with an external thread and an internal thread. The external thread of the first adjusting part 2 is used to engage with the internal thread of the cylinder 1, and the internal thread of the first adjusting part 2 is used to engage with the external thread of the insertion tube 3.

[0068] like Figure 2 As shown, the inner wall of the cylinder 1 is provided with a first internal thread 12, such as... Figure 6 As shown, the outer wall of the first adjusting part 2 is provided with a first external thread 231. The first internal thread 12 and the first external thread 231 cooperate with each other to realize the threaded connection between the cylinder 1 and the first adjusting part 2.

[0069] like Figure 7 As shown, the outer wall of the insertion tube 3 is provided with a second external thread 31, such as... Figure 6 As shown, the inner wall of the first adjusting part 2 is provided with a second internal thread 211. The second external thread 31 and the second internal thread 211 cooperate with each other to realize the threaded connection between the first adjusting part 2 and the extension tube 3.

[0070] In this embodiment, the first adjustment part 2 uses its first external thread 231 and second internal thread 211 to cooperate with the cylinder 1 and the insertion tube 3 respectively, ensuring the coaxiality of the first adjustment part 2, the cylinder 1 and the insertion tube, and avoiding eccentricity; in addition, the double thread coupling design of the first adjustment part 2 makes the structure of the muffler more compact, which is conducive to saving the space occupied by the muffler.

[0071] In some embodiments, the thread direction between the cylinder 1 and the first adjusting part 2 is the same as the thread direction between the first adjusting part 2 and the extension tube 3.

[0072] For example, the first internal thread 12, the first external thread 231, the second internal thread 211, and the second external thread 31 are all right-hand threads; or, the first internal thread 12, the first external thread 231, the second internal thread 211, and the second external thread 31 are all left-hand threads.

[0073] Taking the example where both the thread direction between the cylinder 1 and the first adjusting part 2 and the thread direction between the first adjusting part 2 and the insertion tube 3 are right-handed: When the first adjusting part 2 rotates clockwise, the first adjusting part 2 moves towards the second end of the cylinder 1 (i.e., Figure 5 When the lower end of the middle cylinder 1 moves to the side where it is located, the volume of the silencing cavity 11 decreases, and at the same time, the length of the insertion tube 3 extending into the silencing cavity 11 decreases. When the first adjusting part 2 rotates counterclockwise, it moves towards the side where the first end of the cylinder 1 is located, increasing the volume of the silencing cavity 11, and at the same time, increasing the length of the insertion tube 3 extending into the silencing cavity 11. It should be noted that the above "clockwise" and "counterclockwise" refer to the rotation direction observed when viewed from the first end of the cylinder 1 towards the second end.

[0074] In this embodiment, by setting the thread direction between the cylinder 1 and the first adjustment part 2 to be the same as the thread direction between the first adjustment part 2 and the extension tube 3, the volume of the muffler cavity 11 and the extension length of the extension tube 3 can be quickly and correlatedly adjusted, so that the volume of the muffler cavity 11 and the extension length of the extension tube 3 increase or decrease at the same time, thereby improving the convenience of the muffler's adjustment operation and the efficiency of parameter adjustment.

[0075] In some embodiments, the first adjustment section 2 includes a first connecting section 21, a first expansion section 22 and a first mating section 23 connected in sequence. The first connecting section 21 is connected to the insertion tube 3, and the first mating section 23 is connected to the cylinder 1. The inner diameter of the first mating section 23 is larger than the inner diameter of the first connecting section 21, and the inner diameter of the first expansion section 22 gradually increases from the end near the first connecting section 21 to the end near the first mating section 23.

[0076] like Figure 6 As shown, both the first connecting section 21 and the first mating section 23 are cylindrical. The first external thread 231 is provided on the outer wall of the first mating section 23, and the first mating section 23 is movably connected to the cylinder 1 through the first external thread 231. The second internal thread 211 is provided on the inner wall of the first connecting section 21, and the first connecting section 21 is movably connected to the extension tube 3 through the second internal thread 211.

[0077] The first expansion section 22 is trumpet-shaped. The inner diameter of the first expansion section 22 gradually increases from the first end to the second end of the cylinder 1. While achieving a uniform transition between the first connecting section 21 and the first mating section 23, the cross-sectional expansion of the first expansion section 22 creates a region of abrupt change in acoustic impedance, causing the reflection and interference of sound waves, canceling out the sound energy of a specific frequency, and thus reducing the noise of the compressor pipeline system.

[0078] In some embodiments, such as Figure 1 and Figure 2 As shown, the muffler also includes a second adjustment section 4 and an exhaust pipe 5.

[0079] A portion of the second adjusting section 4 is located inside the cylinder 1. The second adjusting section 4 is a hollow structure with both ends open. The inner walls of the first adjusting section 2, the inner walls of the cylinder 1, and the inner walls of the second adjusting section 4 enclose a sound-absorbing cavity 11. The second adjusting section 4 is movably connected to the cylinder 1 along the axial direction of the cylinder 1. The air outlet pipe 5 is connected to the end of the second adjusting section 4 away from the first adjusting section 2.

[0080] For example, such as Figure 5 As shown, the second end of the cylinder 1 is provided with a second through hole 14 for allowing the second adjustment part 4 to be inserted. The second adjustment part 4 is connected to the second end of the cylinder 1, and at least a part of the second adjustment part 4 is located inside the cylinder 1.

[0081] like Figure 2 and Figure 8 As shown, the second adjustment part 4 has openings at both the upper and lower ends, and the inner wall of the second adjustment part 4 defines the boundary of the lower end of the silencing cavity 11.

[0082] The outlet pipe 5 is suitable for connection with the compressor pipeline. The gas in the compressor enters the silencer through the inlet pipe 3 and then exits the silencer through the outlet pipe 5. The connection between the outlet pipe 5 and the compressor pipeline can be welding, threaded fastener connection, etc.

[0083] Since the second adjustment part 4 is movably connected to the cylinder 1 along the axial direction of the cylinder 1, the second adjustment part 4 can move relative to the cylinder 1 along the axial direction of the cylinder 1, thereby changing the relative position of the second adjustment part 4 in the cylinder 1, and causing the length of the silencing cavity 11 in the axial direction of the cylinder 1 to change. In other words, by the relative movement between the second adjustment part 4 and the cylinder 1, the volume of the silencing cavity 11 can be adjusted, thereby changing the silencing frequency range of the silencer.

[0084] Exemplarily, the positions of the cylinder 1, the extension pipe 3, and the outlet pipe 5 are all fixed relative to the air conditioner. The second adjusting part 4 is movably connected to the outlet pipe 5, thereby preventing the outlet pipe 5 from twisting or moving during the adjustment of the relative position between the second adjusting part 4 and the cylinder 1. The outlet pipe 5 does not extend into the silencer cavity 11, so the second adjusting part 4 can only change the volume of the silencer cavity 11. The silencer provided in this embodiment can adjust both the volume of the silencer cavity 11 and the extension length of the extension pipe 3 simultaneously through the first adjusting part 2, or adjust only the volume of the silencer cavity 11 through the second adjusting part 4, or adjust both the first adjusting part 2 and the second adjusting part 4 simultaneously, achieving bidirectional simultaneous adjustment of the silencer, making it flexible and adaptable.

[0085] In some embodiments, the second adjusting part 4 is threadedly connected to the cylinder 1.

[0086] For example, such as Figure 8 As shown, the outer wall of the second adjustment part 4 is provided with a third external thread 431, which can be connected to the first internal thread 12 on the inner wall of the cylinder 1; the inner wall of the second adjustment part 4 is provided with a third internal thread 411, which can be connected to the external thread provided on the outer wall of the air outlet pipe 5.

[0087] The helix angle between the third external thread 431 and the first internal thread 12 is less than or equal to the equivalent friction angle, thus providing a thread self-locking function between the cylinder 1 and the second adjusting part 4. Without rotating the second adjusting part 4, the second adjusting part 4 and the cylinder 1 can remain locked without relative movement, ensuring the stability of the muffler. Similarly, the helix angle between the third internal thread 411 and the external thread on the outer wall of the exhaust pipe 5 is less than or equal to the equivalent friction angle, thus providing a thread self-locking function between the second adjusting part 4 and the exhaust pipe 5. Without rotating the second adjusting part 4, the second adjusting part 4 and the exhaust pipe 5 can remain locked without relative movement.

[0088] Furthermore, by using the threaded connection to adjust the relative position between the cylinder 1 and the second adjustment part 4, the volume of the muffler cavity 11 can be continuously changed, which is beneficial to more accurately adjust the volume of the muffler cavity 11 and improve the adjustment accuracy of the muffler.

[0089] Optionally, the thread direction between the cylinder 1 and the first adjusting part 2, the thread direction between the first adjusting part 2 and the insertion tube 3, and the thread direction between the cylinder 1 and the second adjusting part 4 are the same.

[0090] In some embodiments, such as Figure 1 As shown, the outer wall of the first adjustment part 2 is provided with a first handle 24, and the outer wall of the second adjustment part 4 is provided with a second handle 44. Both the first handle 24 and the second handle 44 are located outside the cylinder 1.

[0091] In this embodiment, the first handle 24 and the second handle 44 provide gripping points for the operator, so that the operator does not need to manually adjust the position of the first adjustment part 2 and the second adjustment part 4 using the tool housing, which improves the convenience of on-site operation and reduces the risk of pinching injury that may be caused by the operator touching the first adjustment part 2 or the second adjustment part 4 and other moving parts with bare hands.

[0092] In some embodiments, such as Figure 8 As shown, the second adjustment section 4 includes a second connecting section 41, a second expansion section 42, and a second mating section 43 connected in sequence. The second connecting section 41 is connected to the air outlet pipe 5, and the second mating section 43 is connected to the cylinder 1. The inner diameter of the second mating section 43 is larger than the inner diameter of the second connecting section 41, and the inner diameter of the second expansion section 42 gradually increases from the end near the second connecting section 41 to the end near the second mating section 43.

[0093] like Figure 8As shown, the second connecting section 41 and the second mating section 43 are both cylindrical. The third external thread 431 is provided on the outer wall of the second mating section 43, and the second mating section 43 is movably connected to the cylinder 1 through the third external thread 431. The third internal thread 411 is provided on the inner wall of the second connecting section 41, and the second connecting section 41 is movably connected to the air outlet pipe 5 through the third internal thread 411.

[0094] The second expansion section 42 is trumpet-shaped. The inner diameter of the second expansion section 42 gradually increases from the second end to the first end of the cylinder 1. While achieving a uniform transition between the second connecting section 41 and the second mating section 43, the cross-sectional expansion of the second expansion section 42 creates a region of abrupt change in acoustic impedance, causing the reflection and interference of sound waves, canceling out the sound energy of a specific frequency, and thus reducing the noise of the compressor pipeline system.

[0095] This application also provides an air conditioner that includes the silencer provided in any of the above embodiments.

[0096] For example, a muffler is installed on the pipes of the air conditioner compressor.

[0097] The air conditioner provided in this application embodiment includes the silencer provided in any of the above embodiments, and therefore has the beneficial effects of the silencer in any of the above embodiments, which will not be repeated here.

[0098] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0099] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0100] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A silencer, characterized in that, The silencer includes: A cylindrical body (1) having a sound-absorbing cavity (11) inside; The first adjustment part (2) is a hollow structure with both ends through. The outer wall of the first adjustment part (2) is movably connected to the inner wall of the cylinder (1) along the axial direction of the cylinder (1), so as to adjust the volume of the silencing cavity (11). An insertion tube (3) is inserted into the silencing cavity (11) from the first adjustment part (2) at one end. The insertion tube (3) is movably connected to the first adjustment part (2) along the axial direction of the cylinder (1), thereby allowing adjustment of the length of the insertion tube (3) extending into the silencing cavity (11).

2. The silencer according to claim 1, characterized in that, The cylinder (1) is threadedly connected to the first adjusting part (2), and the first adjusting part (2) is threadedly connected to the extension tube (3).

3. The silencer according to claim 2, characterized in that, The cylinder (1) is provided with an internal thread, the insertion tube (3) is provided with an external thread, the first adjustment part (2) is provided with an external thread and an internal thread, the external thread of the first adjustment part (2) is used to cooperate with the internal thread of the cylinder (1), and the internal thread of the first adjustment part (2) is used to cooperate with the external thread of the insertion tube (3).

4. The silencer according to claim 3, characterized in that, The thread direction between the cylinder (1) and the first adjusting part (2) is the same as the thread direction between the first adjusting part (2) and the insertion tube (3).

5. The silencer according to claim 1, characterized in that, The first adjustment section (2) includes a first connecting section (21), a first expansion section (22) and a first mating section (23) connected in sequence. The first connecting section (21) is connected to the insertion tube (3), and the first mating section (23) is connected to the cylinder (1). The inner diameter of the first mating section (23) is larger than the inner diameter of the first connecting section (21), and the inner diameter of the first expansion section (22) gradually increases from one end near the first connecting section (21) to one end near the first mating section (23).

6. The silencer according to any one of claims 1 to 5, characterized in that, The silencer also includes a second adjustment section (4) and an exhaust pipe (5); A portion of the second adjustment part (4) is located inside the cylinder (1). The second adjustment part (4) is a hollow structure with both ends through. The inner wall of the first adjustment part (2), the inner wall of the cylinder (1), and the inner wall of the second adjustment part (4) enclose the sound-absorbing cavity (11). The second adjustment part (4) is movably connected to the cylinder (1) along the axial direction of the cylinder (1). The air outlet pipe (5) is connected to the end of the second adjustment part (4) away from the first adjustment part (2).

7. The silencer according to claim 6, characterized in that, The second adjustment part (4) is threadedly connected to the cylinder (1).

8. The muffler according to claim 6, characterized in that, The outer wall of the first adjustment part (2) is provided with a first handle (24), and the outer wall of the second adjustment part (4) is provided with a second handle (44). Both the first handle (24) and the second handle (44) are located outside the cylinder (1).

9. The muffler according to claim 6, characterized in that, The second adjustment section (4) includes a second connecting section (41), a second expansion section (42), and a second mating section (43) connected in sequence. The second connecting section (41) is connected to the air outlet pipe (5), and the second mating section (43) is connected to the cylinder (1). The inner diameter of the second mating section (43) is larger than the inner diameter of the second connecting section (41), and the inner diameter of the second expansion section (42) gradually increases from one end near the second connecting section (41) to one end near the second mating section (43).

10. An air conditioner, characterized in that, The air conditioner includes the silencer as described in any one of claims 1 to 9.

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