Silencing device and refrigerating and freezing device

Abstract

The invention provides a silencing device. The silencing device comprises a silencing body. The silencing body comprises a through hole, and the through hole penetrates through the side wall of the silencing body; the through hole comprises an inlet, an outlet and a first channel connected with the inlet; the first channel is a tapered channel which is gradually reduced along the direction from the inlet to the outlet; the first channel is divided into a first section and a second section, and the first section is connected to the inlet; the silencing body further comprises a silencing cavity connected with at least one sound absorption hole, and at least one sound absorption hole is formed in the peripheral wall of the second section. When the noise passes through the silencing device, the first section is used for guiding the noise to enter the inlet due to the large opening, so that more noise enters the sound absorption holes of the second section, the noise enters the silencing cavity through the sound absorption holes, and the noise is remarkably reduced under the action of the silencing cavity. Compared with a silencing device with a cylindrical through hole, the silencing device in the embodiment can absorb more noise, and the silencing quality of the silencing device is improved while the heat dissipation effect in a compressor bin is not weakened.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration and freezing devices, and in particular to a silencer. Background Art

[0002] Refrigerator noise is an important indicator of refrigerator performance. The current sources of refrigerator noise mainly include the operating noise of the compressor at the bottom of the refrigerator, the thermal expansion and contraction or eruption noise of the evaporator or condenser, the operating noise of the refrigeration fan, the operating noise of the freezing fan, the noise of the refrigerant flowing in the pipeline, etc. Among them, the compressor noise is the most important noise source, and its noise contribution often accounts for more than 70%. In addition, abnormal noises in refrigerators frequently occur in the compressor compartment, which seriously affects the quality of the refrigerator. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a silencer and a refrigeration and freezing device that overcome the above problems or at least partially solve the above problems, and can reduce the noise generated by the compressor of the refrigeration and freezing device.

[0004] Specifically, the present invention provides a silencing device, comprising:

[0005] A muffler body, the muffler body comprising a through hole, the through hole penetrating through the side wall of the muffler body; the through hole comprising an inlet, an outlet, and a first channel connected to the inlet; the first channel is a tapered channel that gradually becomes smaller along a direction from the inlet to the outlet; the first channel is divided into a first section and a second section, the first section being connected to the inlet;

[0006] The muffler body further comprises at least one muffler cavity, and at least one sound absorbing hole is arranged on the peripheral wall of the second section, and each of the sound absorbing holes is communicated with at least one muffler cavity.

[0007] Optionally, the through hole also includes a third channel connected to the outlet and a second channel connecting the first channel and the third channel; the cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel; the third channel is a gradually expanding channel that gradually increases from the end connected to the second channel to the other end.

[0008] Optionally, the muffler body further comprises at least one sound inlet, and the sound inlet is arranged on a side wall of the muffler body where the inlet is arranged;

[0009] A communication port is provided on the side wall of the third channel, and each of the sound inlets is connected to the third channel through at least one of the muffler chambers and the communication port; and / or,

[0010] A communication port is provided on the side wall of the second channel, and each of the sound inlets is connected to the second channel through at least one of the muffler chambers and the communication port.

[0011] The present invention provides a silencing device, comprising:

[0012] A muffler body, the muffler body comprising a through hole, the through hole penetrating through the side wall of the muffler body; the through hole comprising an inlet, an outlet, a first channel connected to the inlet, a third channel connected to the outlet, and a second channel connecting the first channel and the third channel; the cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel; the first channel and the third channel are gradually expanding channels starting from the end connected to the second channel to the other end;

[0013] The muffler body further comprises at least one sound inlet, and the sound inlet is arranged on the side wall of the muffler body where the inlet is arranged;

[0014] A communication port is provided on the side wall of the third channel, and each of the sound inlets is connected to the third channel through at least one of the muffler chambers and the communication port; and / or,

[0015] A communication port is provided on the side wall of the second channel, and each of the sound inlets is connected to the second channel through at least one of the muffler chambers and the communication port.

[0016] Optionally, at least one of the muffler chambers is in a labyrinth structure, an acoustic flow structure, a honeycomb structure, or a straight tube structure;

[0017] The sound-absorbing body is a sound-absorbing metamaterial.

[0018] Optionally, the muffler body is a split structure, and the muffler body is divided into a first body and a second body along its thickness direction.

[0019] The first body comprises a first side plate, an outer wall and a muffler cavity partition located on the first side plate;

[0020] The second body includes a second side plate and a slot located on the second side plate and plugged into the muffler chamber partition. The first side plate, the muffler chamber partition, the outer wall and the second side plate together enclose the through hole and the muffler chamber.

[0021] Optionally, an edge of the outer wall away from the first side plate is welded to the second side plate;

[0022] The type of welding is vibration friction welding or ultrasonic welding.

[0023] Optionally, the length of the first channel is greater than the length of the third channel;

[0024] The length of the third channel is greater than the length of the second channel;

[0025] The length ratio between the third channel and the first channel is 1 / 5 to 3 / 5;

[0026] The length ratio of the second channel to the first channel is 1 / 15 to 1 / 4.

[0027] Optionally, the diameter of the outlet is greater than the diameter of the inlet;

[0028] The ratio of the diameter of the inlet to the diameter of the outlet is 2 / 5 to 4 / 5;

[0029] The ratio of the diameter of the second passage to the diameter of the inlet is 1 / 5 to 3 / 5.

[0030] The present invention provides a refrigeration and freezing device, comprising any one of the above-mentioned silencers.

[0031] Optionally, the refrigeration and freezing device further includes a compressor compartment and a compressor located in the compressor compartment, and the through hole of the silencer device communicates the interior and the exterior of the compressor compartment.

[0032] Optionally, the compressor compartment includes a left wall and a right wall, and the silencer is installed on both the left wall and the right wall of the compartment.

[0033] In a silencer and a refrigeration and freezing device of the present invention, since the first channel gradually becomes smaller in the direction from the inlet to the outlet, that is, the cross-sectional area gradually becomes smaller, when the noise passes through the silencer, the first section is used to guide the noise into the inlet due to the larger opening, which also facilitates the flow of airflow, thereby allowing more noise to enter the sound absorption holes of the second section, and the noise enters the silencer cavity through the sound absorption holes, and the noise is significantly reduced under the action of the silencer cavity. The silencer in this embodiment can absorb more noise than the silencer with a cylindrical through hole, so that the silencer can improve the sound reduction quality without reducing the heat dissipation effect in the compressor compartment.

[0034] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0036] Figure 1is a schematic structural diagram of a silencing device according to an embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of a silencing device according to an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a silencing device according to an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a muffler according to one embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of a muffler according to one embodiment of the present invention;

[0041] Figure 6 It is a schematic structural diagram of a refrigeration and freezing device in one embodiment of the present invention. DETAILED DESCRIPTION

[0042] Refer to the following Figures 1 to 6 To describe a silencer device of an embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0043] Unless otherwise clearly defined and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person skilled in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0044] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] Figure 1 is a schematic structural diagram of a silencing device 100 according to an embodiment of the present invention, as shown in Figure 1 As shown, and refer to Figures 2 to 6 , an embodiment of the present invention provides a silencer device 100, including a silencer body.

[0047] The muffler body comprises a through hole 101, which passes through the side wall of the muffler body. The through hole 101 comprises an inlet, an outlet, and a first channel connected to the inlet.

[0048] The muffler body further includes at least one muffler cavity 103 . At least one sound absorbing hole 102 is provided on the peripheral wall of the first channel. Each sound absorbing hole 102 is connected to at least one muffler cavity 103 .

[0049] The silencer 100 is placed inside or outside the compressor compartment, and the through hole 101 connects the inside and outside of the compressor compartment. When the noise in the compressor compartment propagates from the inside to the outside, it passes through the silencer 100 inside or outside the compressor compartment, and the noise enters the silencer cavity 103 through the through hole 101 and the sound absorption hole 102. Under the silencing effect of the silencer cavity 103, the noise is significantly reduced. In addition, the through hole 101 of the silencer body also has the function of heat dissipation, which can transfer the heat in the compressor compartment to the outside of the compressor.

[0050] In particular, if Figure 1As shown, in some embodiments of the present invention, the first channel is a tapered channel that gradually becomes smaller along the direction from the inlet to the outlet. The first channel is divided into a first section and a second section, and the first section is connected to the inlet. At least one sound absorbing hole 102 is arranged on the peripheral wall of the second section.

[0051] The first passage gradually becomes smaller in the direction from the inlet to the outlet, that is, the cross-sectional area gradually becomes smaller. When the noise passes through the silencer 100, the first section is used to guide the noise into the inlet due to the larger opening, which is also convenient for the flow of airflow, thereby allowing more noise to enter the sound absorption hole 102 of the second section, and the noise enters the silencer cavity 103 through the sound absorption hole 102. Under the action of the silencer cavity 103, the noise is significantly reduced. The silencer 100 in this embodiment can absorb more noise than the silencer with a cylindrical through hole, so that the silencer 100 improves the sound absorption quality while not weakening the heat dissipation effect in the compressor compartment.

[0052] In some embodiments of the present invention, Figure 1 As shown, the through hole 101 also includes a third channel connected to the outlet and a second channel connecting the first channel and the third channel. The cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel. The third channel is a gradually expanding channel that gradually increases from the end connected to the second channel to the other end.

[0053] In some embodiments of the present invention, Figure 2 As shown, the muffler body further includes at least one sound inlet 104, and the sound inlet 104 is arranged on the side wall of the muffler body where the inlet is arranged.

[0054] Furthermore, a communication port is provided on the side wall of the third channel, and each sound inlet 104 is connected to the third channel through at least one muffler cavity 103 and the communication port.

[0055] In other embodiments of the present invention, Figure 2 As shown, a communication port is provided on the side wall of the second channel, and each sound inlet 104 is connected to the second channel through at least one muffler cavity 103 and the communication port.

[0056] In some embodiments of the present invention, a connecting port is provided on the side wall of the second channel, and a connecting port is provided on the side wall of the third channel, and each sound inlet 104 is connected to the second or third channel through at least one muffler cavity 103 and the connecting port.

[0057] In this embodiment, the special structure of the first channel, the second channel and the third channel is conducive to the airflow entering 104, that is, it is conducive to the noise entering the muffler chamber 103 for noise reduction. The noise can not only enter the muffler chamber 103 from the inlet to achieve the effect of muffler, but also enter the muffler chamber 103 from the sound inlet 104 for muffler. More noise can enter the muffler chamber 103, thereby improving the quality of noise reduction.

[0058] The embodiment of the present invention also provides another silencer device 100, including a silencer body. The silencer body includes a through hole 101, and the through hole 101 passes through the side wall of the silencer body. The through hole 101 includes an inlet, an outlet, a first channel connected to the inlet, a third channel connected to the outlet, and a second channel connecting the first channel and the third channel. The cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel. The first channel and the third channel are gradually expanding channels that gradually increase from the end connected to the second channel to the other end. The silencer body also includes at least one sound inlet 104, and the sound inlet 104 is provided on the side wall of the silencer body where the inlet is provided.

[0059] A communication port is provided on the side wall of the third channel, and each sound inlet 104 is connected to the third channel through at least one muffler cavity 103 and the communication port. And / or, a communication port is provided on the side wall of the second channel, and each sound inlet 104 is connected to the second channel through at least one muffler cavity 103 and the communication port.

[0060] In this embodiment, the special structure of the first channel, the second channel and the third channel can generate negative pressure to facilitate the airflow to enter 104, that is, to facilitate the noise to enter the muffler chamber 103, and to reduce the noise. In this example, the noise only enters from the sound inlet 104, and is weakened after passing through the muffler chamber 103, so that the noise can be reduced.

[0061] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, at least one muffler chamber 103 has a labyrinth structure.

[0062] In this embodiment, compared with the sound-flow structure, honeycomb structure or straight tube structure of the silencer cavity 103, the labyrinth structure of the silencer cavity 103 is deeper, which can significantly extend the sound propagation path and constitute an acoustic superstructure, thereby further enhancing the noise reduction effect of the silencer device 100.

[0063] In some optional embodiments of the present invention, at least one muffler chamber 103 is in an acoustic flow structure.

[0064] In some optional embodiments of the present invention, at least one muffler cavity 103 has a honeycomb structure.

[0065] In some optional embodiments of the present invention, at least one muffler chamber 103 is a straight tube structure.

[0066] In some embodiments of the present invention, the sound-absorbing body is a sound-absorbing metamaterial.

[0067] Specifically, the sound-absorbing metamaterial (MAT metamaterial, MAT is the abbreviation of Metamaterial Absorption Technology) uses a synthetic material with high sound absorption efficiency, and there is a complex maze pattern structure on it. Each maze channel can absorb specific frequencies, and its sound absorption efficiency is as high as 99%. In addition, compared with general sound-absorbing materials, the chemical properties of sound-absorbing metamaterials are more stable, safer, odorless, elastic, fire-retardant, mildew-proof and anti-bacterial, and have a good feel and weight.

[0068] In some alternative embodiments of the present invention, the silencer body is made of ABS material.

[0069] In some optional embodiments of the present invention, Figure 3 As shown, an installation and assembly interface 130 for installing the ventilation grille is provided at the through hole 101. In this embodiment, the installation and assembly interface 130 is a snap-on structure, and the installation and assembly interface 130 is consistent with the existing interface, and is used to install the ventilation grille, thereby improving versatility and practicality, reducing costs, and can be used for different types and models of refrigeration and freezing devices.

[0070] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the silencer body is a split structure, and the silencer body is divided into a first body 110 and a second body 120 along its thickness direction.

[0071] During the manufacturing process, the first body 110 and the second body 120 are manufactured separately. After the first body 110 and the second body 120 are manufactured respectively, the first body 110 and the second body 120 are assembled together to form the silencer 100. During the separate manufacturing process, it is convenient to design a plurality of silencer cavities 103 with different lengths, widths and heights according to the noise reduction requirements, so that the silencer cavities 103 of different sizes correspond to different noise reduction pressure bands, so that the silencer 100 can have a better noise reduction effect.

[0072] In this embodiment, since the muffler body is a split structure, the production and preparation of the first body 110 and the second body 120 are convenient, and the difficulty of production and processing is reduced. Therefore, the muffler body of the present invention is convenient to manufacture and assemble, thereby simplifying the manufacturing process of the refrigeration and freezing device and saving production costs. In addition, it is convenient to set a plurality of muffler cavities 103 of different sizes inside the muffler body, which is more conducive to absorbing noises of different frequencies.

[0073] In some embodiments of the present invention, the first body 110 includes a first side plate 111 , an outer wall, and a partition of the muffler cavity 103 located on the first side plate 111 .

[0074] In some embodiments of the present invention, Figure 4 As shown, the second body 120 includes a second side plate 121 and a slot 122 located on the second side plate 121 and plugged into the partition of the muffler chamber 103. The first side plate 111, the partition of the muffler chamber 103, the outer wall and the second side plate 121 together enclose the through hole 101 and the muffler chamber 103.

[0075] During the manufacturing and assembly process, the first body 110 and the second body 120 are first manufactured separately, and then the two are assembled together. Specifically, the muffler cavity partition 112 of the first body 110 is inserted into the slot 122 of the second body 120, and the outer wall of the first body 110 is in contact with the second side plate 121 of the second body 120, so that the first body 110 and the second body 120 are enclosed together to form the through hole 101 and the muffler cavity 103.

[0076] In this embodiment, since the muffler cavity partition 112 is inserted into the slot 122, on the one hand, each muffler cavity 103 can be a closed cavity, thereby improving the sealing effect and noise reduction effect of each muffler cavity 103. On the other hand, it can also play a positioning role, thereby improving the assembly efficiency of the first body 110 and the second body 120.

[0077] In some embodiments of the present invention, Figure 5 As shown, the second side plate 121 is provided with a convex strip 123 forming the slot 122. In some alternative embodiments of the present invention, a concave portion forming the slot 122 is opened on the surface of the first side wall.

[0078] In this embodiment, since the slot 122 is composed of the convex strips 123, the depth of the slot 122 can be increased, thereby increasing the size of the portion of the muffler cavity partition 112 inserted into the slot 122, thereby further improving the sealing effect and noise reduction effect of each muffler cavity 103.

[0079] In some embodiments of the present invention, an edge of the outer wall away from the first side plate is welded to the second side plate.

[0080] During the manufacturing and assembly process, the muffler cavity partition 112 of the first body 110 is inserted into the slot 122 of the second body 120, and the outer wall of the first body 110 is in contact with the second side plate 121 of the second body 120, and then the connection position between the outer wall and the second side plate 121 is welded to fix the two together.

[0081] In this embodiment, the welding method can improve the sealing performance of the silencer 100 compared with the fastening connection or the clamping method, so that the silencer 100 can have a better noise reduction effect.

[0082] Furthermore, in some embodiments of the present invention, the type of welding is vibration friction welding.

[0083] Specifically, the edge of the outer wall away from the first side plate 111 is fixedly connected to the second side plate 121 by means of vibration friction welding. Vibration friction welding is a technology that uses the heat generated by interface friction caused by the relative vibration of two welds to achieve welding. The welds are placed on a specified device and vibrate and rub on the contact surface under a certain pressure until the interface begins to melt. The vibration is then stopped and the pressure is maintained until solidification, thereby achieving the welding purpose. By using vibration friction welding, the connection strength between the outer wall and the second side plate 121 can be improved, and the welding speed can also be increased. In addition, no welding smoke and pollutants such as manganese and nickel that are harmful to the human body are generated during the welding process.

[0084] In other embodiments of the present invention, the type of welding is ultrasonic welding.

[0085] Specifically, the edge of the outer wall away from the first side plate 111 and the second side plate 121 are fixedly connected together by ultrasonic welding. Compared with the traditional welding method, ultrasonic welding has significant advantages, such as fast welding speed, high welding efficiency, good weld quality, beautiful weld, clean and environmentally friendly welding process, and is very suitable for mass production. Therefore, ultrasonic welding is a fast, clean and effective assembly process.

[0086] In some embodiments of the present invention, the outer contour of the second side plate 121 is larger than the outer contour of the outer wall, so that the weld or the solder does not extend beyond the second body 120 after welding.

[0087] In this embodiment, since the outer contour of the second side plate 121 is larger than the outer contour of the outer wall, after welding, the weld or solder between the two will not be at the outermost edge of the silencer 100, thereby making the appearance of the silencer 100 more beautiful.

[0088] In some alternative embodiments of the present invention, the outer contour of the second side plate 121 is equal to the outer contour of the outer wall.

[0089] In some alternative embodiments of the present invention, the fixed connection between the outer wall and the second side plate 121 is a fastening connection. For example, connection holes are provided on the edges of the second side plate 121 and the outer wall away from the first side plate 111. The muffler cavity partition 112 of the first body 110 is inserted into the slot 122 of the second body 120, and the outer wall of the first body 110 is in contact with the second side plate 121 of the second body 120, and then screws are inserted into the connection holes, and the first body 110 and the second body 120 are fastened together by the screws. This fastening connection method has the advantages of easy operation and high assembly efficiency.

[0090] In some other alternative embodiments of the present invention, the fixed connection between the outer wall and the second side plate 121 is achieved by snap-fitting.

[0091] In some embodiments of the present invention, the length of the first channel is greater than the length of the third channel.

[0092] The length of the third channel is greater than that of the second channel. Preferably, the length ratio between the third channel and the first channel is 1 / 5 to 3 / 5. The length ratio between the second channel and the first channel is 1 / 15 to 1 / 4.

[0093] In some embodiments of the present invention, the diameter of the outlet is greater than the diameter of the inlet. Preferably, the ratio of the diameter of the inlet to the diameter of the outlet is 2 / 5 to 4 / 5. The ratio of the diameter of the second channel to the diameter of the inlet is 1 / 5 to 3 / 5.

[0094] In some optional embodiments of the present invention, the aperture of the second channel of the through hole 101 is 10-200 mm.

[0095] For example, the aperture of the second channel of the through hole 101 is 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, 120 mm, 150 mm, 180 mm or 200 mm.

[0096] Specifically, since the through hole 101 on the muffler body can be used as a sound inlet hole and a heat dissipation hole at the same time, a large aperture of the through hole 101 is beneficial to heat dissipation, but a large aperture will result in a decrease in noise reduction. A small aperture of the through hole 101 is beneficial to noise reduction, but the heat dissipation will decrease. Therefore, in this embodiment, by setting the aperture of the second channel of the through hole 101, that is, the aperture of the smallest diameter section of the through hole 101, to a reasonable size, the muffler 100 has a good noise reduction effect and a good heat dissipation effect.

[0097] In some optional embodiments of the present invention, an installation and assembly interface 130 for installing a ventilation grille is provided at the through hole 101. In this embodiment, the installation and assembly interface 130 is a snap-on structure, and the installation and assembly interface 130 is consistent with the existing interface, and is used to install the ventilation grille, thereby improving versatility and practicality, reducing costs, and can be used for refrigerators of different categories and models.

[0098] like Figure 6 As shown, the present invention provides a refrigeration and freezing device, a silencer 100 in any of the above embodiments. The silencer can be used to reduce noise at a part of the refrigeration and freezing device that generates noise. For example, it is arranged near a fan to reduce noise generated by the fan. In this embodiment, by installing the silencer 100 on the refrigeration and freezing device, the noise on the refrigeration and freezing device can be reduced, thereby improving the user experience.

[0099] In some embodiments of the present invention, the refrigeration and freezing device further includes a compressor compartment 300 and a compressor 301 in the compressor compartment 300. The through hole of the muffler communicates the inside and the outside of the compressor compartment. This arrangement can reduce the noise generated when the compressor 301 is working, thereby reducing the noise generated by the refrigeration and freezing device, and improving the user experience.

[0100] In some embodiments of the present invention, the compressor compartment 300 includes a left wall and a right wall, and a silencer 100 is installed on both the left wall and the right wall of the compartment.

[0101] In some optional embodiments of the present invention, the silencer 100 is installed on the inner side of the warehouse wall of the compressor warehouse 300. A through hole corresponding to the through hole is opened on the corresponding warehouse wall. When in use, when the noise in the compressor warehouse 300 propagates from the inside to the outside, it passes through the silencer body. Under the obstruction of the side wall of the silencer body, the noise enters the interior of the silencer cavity 103 through the through hole 101 and the sound absorption hole 102 and / or the sound inlet 104, thereby extending the propagation path of the sound. Under the silencing effect of the silencer cavity 103, the noise is significantly reduced. The heat in the compressor is transported to the outside of the compressor warehouse 300 through the through hole 101 and the through hole.

[0102] In some other optional embodiments of the present invention, the silencer 100 is installed on the outer side of the compartment wall of the compressor compartment 300 , and a through hole corresponding to the through hole 101 is opened on the corresponding compartment wall.

[0103] When in use, when the noise in the compressor compartment 300 propagates from the inside to the outside, it passes through the muffler body, and under the obstruction of the side wall of the muffler body, the noise enters the muffler cavity 103 through the through hole, through hole 101, sound absorption hole 102 and / or sound inlet 104. Under the muffler effect of the muffler cavity 103, the noise is significantly reduced. The heat in the compressor is transported to the outside of the compressor compartment 300 through the through hole and through hole 101. In addition, the muffler device 100 is installed in the foam layer around the compressor compartment 300, which does not occupy the volume of the refrigerator extra, that is, the volume of the refrigerator can be lost as little as possible, and the installation is stable and firm, impact-resistant, and meets the transportation test.

[0104] In some other optional embodiments of the present invention, the silencer 100 is installed in the wall of the compressor compartment 300, and a through hole for installing the silencer 100 is opened on the corresponding wall, and the through hole can also be called a mounting hole. For example, both the left wall and the right wall include a foam material layer, and the silencer 100 can be installed in the foam material layer.

[0105] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A silencing device, characterized in that: include: A muffler body, the muffler body comprising a through hole, the through hole penetrating through the side wall of the muffler body; the through hole comprising an inlet, an outlet, and a first channel connected to the inlet; the first channel is a tapered channel that gradually becomes smaller along a direction from the inlet to the outlet; the first channel is divided into a first section and a second section, the first section being connected to the inlet; The muffler body further comprises at least one muffler cavity, and at least one sound absorbing hole is arranged on the peripheral wall of the second section, and each of the sound absorbing holes is communicated with at least one muffler cavity.

2. The silencing device according to claim 1, characterized in that: The through hole also includes a third channel connected to the outlet and a second channel connecting the first channel and the third channel; the cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel; the third channel is a gradually expanding channel that gradually increases from the end connected to the second channel to the other end.

3. The silencing device according to claim 2, characterized in that: The muffler body further comprises at least one sound inlet, and the sound inlet is arranged on the side wall of the muffler body where the inlet is arranged; A communication port is provided on the side wall of the third channel, and each of the sound inlets is connected to the third channel through at least one of the muffler chambers and the communication port; and / or, A communication port is provided on the side wall of the second channel, and each of the sound inlets is connected to the second channel through at least one of the muffler chambers and the communication port.

4. A silencing device, characterized in that: include: A muffler body, the muffler body comprising a through hole, the through hole penetrating through the side wall of the muffler body; the through hole comprising an inlet, an outlet, a first channel connected to the inlet, a third channel connected to the outlet, and a second channel connecting the first channel and the third channel; the cross-sectional areas of the first channel and the third channel are both larger than the cross-sectional area of ​​the second channel; the first channel and the third channel are gradually expanding channels starting from the end connected to the second channel to the other end; The muffler body further comprises at least one sound inlet, and the sound inlet is arranged on the side wall of the muffler body where the inlet is arranged; A connecting port is provided on the side wall of the third channel; the silencer body also includes at least one silencer cavity, and each of the sound inlets is connected to the third channel through at least one of the silencer cavity and the connecting port; and / or a connecting port is provided on the side wall of the second channel, and each of the sound inlets is connected to the second channel through at least one of the silencer cavity and the connecting port.

5. The silencing device according to claim 2 or 4, characterized in that: The length of the first channel is greater than the length of the third channel; The length of the third channel is greater than the length of the second channel; The length ratio between the third channel and the first channel is 1 / 5 to 3 / 5; The length ratio of the second channel to the first channel is 1 / 15 to 1 / 4.

6. The silencing device according to claim 2 or 4, characterized in that: The diameter of the outlet is greater than the diameter of the inlet; The ratio of the diameter of the inlet to the diameter of the outlet is 2 / 5 to 4 / 5; The ratio of the diameter of the second passage to the diameter of the inlet is 1 / 5 to 3 / 5.

7. The silencing device according to any one of claims 1 to 4, characterized in that: At least one of the muffler cavities is in a labyrinth structure, an acoustic flow structure, a honeycomb structure, or a straight tube structure; the muffler body is a sound-absorbing metamaterial; The muffler body is a split structure, and the muffler body is divided into a first body and a second body along its thickness direction. The first body comprises a first side plate, an outer wall and a muffler cavity partition located on the first side plate; The second body includes a second side plate and a slot located on the second side plate and plugged into the muffler chamber partition. The first side plate, the muffler chamber partition, the outer wall and the second side plate together enclose the through hole and the muffler chamber.

8. A refrigeration and freezing device, characterized in that: A silencing device comprising the silencing device according to any one of claims 1 to 7.

9. The refrigerator-freezer according to claim 8, characterized in that: It also includes a compressor compartment and a compressor in the compressor compartment, and the through hole of the silencer device communicates with the inside and outside of the compressor compartment.

10. The refrigerator-freezer according to claim 9, characterized in that: The compressor compartment comprises a left wall and a right wall, and the silencer is installed on both the left wall and the right wall.

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