A silencer for a refrigerator
By designing a multi-stage silencer with decreasing outer diameter and aperture of the silencer disc, combined with a sound-absorbing cotton tube and a flow-damping cover, the problem of low airflow efficiency of the silencer is solved, achieving efficient sound absorption and noise reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI JINHE REFRIGERATION TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-03
AI Technical Summary
The existing multi-layered structure of the silencer affects the airflow, resulting in a decrease in the exhaust efficiency of the refrigeration unit and a poor silencing effect.
The design incorporates a multi-stage silencer with progressively decreasing outer diameter and aperture of the silencer disc. Combined with a sound-absorbing cotton tube and a flow-damping hood, this increases the airflow contact area and time, and weakens the sound wave energy by repeatedly changing the airflow direction and speed.
It effectively improves the noise reduction effect, reduces the operating noise of the refrigeration unit, and ensures stable operation of the equipment.
Smart Images
Figure CN224454995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration technology, specifically a silencer for refrigeration machines. Background Technology
[0002] A refrigeration machine is a machine that transfers heat from a cooled object at a lower temperature to the surrounding medium to obtain cooling capacity. The heat transferred from the object at a lower temperature is conventionally called cooling capacity. The working fluid that participates in the thermodynamic process (energy conversion and heat transfer) in the refrigeration machine is called refrigerant. The silencer is one of the key components of the refrigeration machine, and the quality of the silencer directly affects the noise level of the refrigeration machine.
[0003] While the sound insulation panels inside existing silencers do have the effect of reducing airflow noise, single-layer silencers are not very effective, and multi-layer silencers increase air resistance and affect the exhaust efficiency of the refrigeration unit.
[0004] In the prior art, Chinese utility model application number CN202122017442.5 discloses a silencer for a refrigeration machine, including a silencer shell, a silencer cylinder inside the silencer shell, several sets of silencer baffles inside the silencer cylinder, a silencer disc at the middle opening of each set of silencer baffles, a heat insulation plate between the inner wall of the silencer shell and the outer side of the silencer cylinder, sound insulation cotton between the fixed disc and the silencer cover, and several small exhaust holes opened at the contact part between the exhaust pipe and the sound insulation cotton. This silencer for a refrigeration machine can effectively improve the silencer's noise reduction effect.
[0005] In practical applications, the multi-layered mufflers mentioned in the above-cited documents can affect the airflow and cause the aforementioned problem of reduced exhaust efficiency. Therefore, we need to propose a muffler for refrigeration machines. Utility Model Content
[0006] The purpose of this utility model is to provide a silencer for a refrigeration machine, which is provided with multiple silencer discs of different diameters, and the size of the silencer discs increases sequentially from the airflow inward direction to the airflow outward direction, while the size of the holes on the silencer discs decreases sequentially, so as to reduce local turbulence in the airflow and further improve the silencer's noise reduction effect, thereby solving the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a silencer for a refrigeration unit, comprising:
[0008] The silencer housing, and the air inlet pipe and outlet pipe for airflow, wherein the top of the silencer housing is equipped with a silencer cover for the outlet pipe;
[0009] A multi-stage silencing mechanism installed inside the silencing housing, connecting the intake pipe and the exhaust pipe;
[0010] The multi-stage silencing mechanism includes a silencing inner cylinder, a first silencing cover, a second silencing cover, and a third silencing cover. The first silencing cover, the second silencing cover, and the third silencing cover are installed sequentially from top to bottom on the inner wall of the silencing inner cylinder. The lower ends of the first silencing cover, the second silencing cover, and the third silencing cover are respectively equipped with a first silencing disc, a second silencing disc, and a third silencing disc.
[0011] Preferably, the outer diameters of the first, second, and third silencing discs decrease sequentially from top to bottom, the apertures of the first, second, and third silencing discs decrease sequentially from top to bottom, and the axes of the first, second, and third silencing covers are all located on the same axis.
[0012] Preferably, a support ring is integrally formed on the upper outer side of the silencing inner cylinder, and two sets of positioning holes are provided on the upper surface of the support ring. A silencing cotton tube is fixedly connected to the inner wall of the silencing outer shell, and a protrusion for installing the two sets of positioning holes is fixedly connected to the upper opening of the silencing cotton tube.
[0013] Preferably, the inner wall of the sound-absorbing cotton tube is fixedly connected with a limiting ring that supports the sound-absorbing inner tube, the inner diameter of the limiting ring is the same as the inner diameter of the sound-absorbing inner tube, and the lower end of the air outlet pipe is provided with a flow collector.
[0014] Preferably, the intake pipe mainly consists of a connecting pipe and a connector cover. The connector cover is installed at one end of the connecting pipe. An installation pipe for threaded connection of the connecting pipe is provided on the outer side of the muffler housing. A sealing gasket is provided on the outer side of the connecting pipe near the connector cover.
[0015] Preferably, the bottom of the sound-absorbing cotton cylinder is provided with a flow-damping hood, the air inlet end of the flow-damping hood is provided with a buffer gasket that connects to the connecting pipe, the air outlet end of the flow-damping hood is fixedly connected with an installation angle plate, and the installation angle plate is fixed to the bottom of the sound-absorbing cotton cylinder. The lower end of the sound-absorbing cover is provided with a threaded pressure plate that is threadedly connected to the sound-absorbing outer shell, and the lower surface of the threaded pressure plate abuts against the upper surface of the support ring.
[0016] Preferably, it also includes a connecting mechanism, which includes an air outlet connector installed in the middle of the upper surface of the muffler cover and connected to the air outlet pipe. The air outlet connector has grooves on both sides, and a lever is slidably arranged in the groove. One end of the lever is fixedly connected to a locking block, and a spring that abuts against the lever is arranged in the groove.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] This utility model mainly utilizes the cooperation between the silencing shell, the silencing cover, and the multi-stage silencing mechanism. By setting the outer diameter and aperture of the first, second, and third silencing discs to decrease sequentially from top to bottom, the airflow direction and speed are continuously changed as it flows through the multi-stage silencing mechanism. Under the obstruction of the first, second, and third silencing discs, the sound wave energy is weakened multiple times. At the same time, the contact area and contact time between the airflow and the multi-stage silencing mechanism are increased, further improving the silencing efficiency and effectively reducing the noise generated during the operation of the refrigeration unit, creating a quiet environment for the stable operation of the equipment. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 3 This is a schematic diagram of the flow-damping shroud structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the connection mechanism structure of this utility model;
[0023] Figure 5 This is a schematic diagram of the multi-stage noise reduction mechanism of this utility model.
[0024] In the diagram: 1. Silencer housing; 2. Intake pipe; 21. Connecting pipe; 22. Connector cover; 23. Sealing gasket; 3. Connecting mechanism; 31. Exit connector; 32. Groove; 33. Toggle block; 34. Spring; 35. Locking block; 4. Silencer cover; 41. Threaded pressure plate; 5. Exit pipe; 6. Silencer cotton tube; 7. Flow buffer; 71. Buffer gasket; 72. Mounting angle plate; 8. Multi-stage silencing mechanism; 81. Silencer inner cylinder; 82. Support ring; 83. Positioning hole; 84. First silencer cover; 85. Second silencer cover; 86. Third silencer cover; 87. First silencer disc; 88. Second silencer disc; 89. Third silencer disc; 9. Flow collector; 10. Limiting ring; 11. Protrusion; 12. Mounting pipe. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figure 1-5This utility model provides a technical solution: a silencer for a refrigeration machine, comprising:
[0027] The silencer housing 1, the air inlet pipe 2 and the air outlet pipe 5 for airflow in and out, and the silencer cover 4 for air outlet pipe 5 are installed on the top of the silencer housing 1.
[0028] A multi-stage silencing mechanism 8 is installed inside the silencing housing 1 to connect the air intake pipe 2 and the air outlet pipe 5;
[0029] The multi-stage silencing mechanism 8 includes a silencing inner cylinder 81, a first silencing cover 84, a second silencing cover 85, and a third silencing cover 86. The first silencing cover 84, the second silencing cover 85, and the third silencing cover are installed on the inner wall of the silencing inner cylinder 81 from top to bottom. The lower end of the first silencing cover 84, the lower end of the second silencing cover 85, and the lower end of the third silencing cover 86 are respectively equipped with a first silencing disc 87, a second silencing disc 88, and a third silencing disc 89.
[0030] The outer diameters of the first silencer disc 87, the second silencer disc 88, and the third silencer disc 89 decrease sequentially from top to bottom. The apertures of the first silencer disc 87, the second silencer disc 88, and the third silencer disc 89 decrease sequentially from top to bottom. The axes of the first silencer cover 84, the second silencer cover 85, and the third silencer cover 86 are all set on the same axis. The first silencer cover 84, the second silencer cover 85, and the third silencer cover 86 can increase the residence time of gas in the silencer inner cylinder 81, thereby reducing the noise of airflow.
[0031] The upper outer side of the silencing inner cylinder 81 is integrally formed with a support ring 82. The upper surface of the support ring 82 is provided with two sets of positioning holes 83. The inner wall of the silencing outer shell 1 is fixedly connected with a silencing cotton tube 6, and the upper opening of the silencing cotton tube 6 is fixedly connected with a protrusion 11 for installation of the two sets of positioning holes 83. The positioning holes 83 on the support ring 82 can be easily and quickly inserted into the protrusion 11, thereby preventing the silencing inner cylinder 81 from shaking after installation and improving the stability of the silencing inner cylinder 81 installation.
[0032] The inner wall of the sound-absorbing cotton cylinder 6 is fixedly connected with a limiting ring 10 that supports the sound-absorbing inner cylinder 81. The inner diameter of the limiting ring 10 is the same as the inner diameter of the sound-absorbing inner cylinder 81. The lower end of the air outlet pipe 5 is provided with a flow collector 9. The flow collector 9 can concentrate the airflow after the multi-stage sound-absorbing mechanism 8 is silenced and then discharged through the air outlet pipe 5, which improves the efficiency of airflow collection. At the same time, the limiting ring 10 can restrict the installation position of the sound-absorbing inner cylinder 81, thereby ensuring the stability of the sound-absorbing inner cylinder 81 after installation.
[0033] The intake pipe fitting 2 mainly consists of a connecting pipe 21 and a connector cover 22. The connector cover 22 is installed at one end of the connecting pipe 21. The outer side of the muffler housing 1 is provided with an installation pipe 12 for threaded connection of the connecting pipe 21. A sealing gasket 23 is provided at the outer end of the connecting pipe 21 near the connector cover 22. The connector cover 22 facilitates connection with external devices, and the connecting pipe 21 is conveniently installed on the installation pipe 12, which improves the ease of installation. At the same time, the sealing gasket 23 improves the sealing between the connecting pipe 21 and the muffler housing 1.
[0034] The bottom of the sound-absorbing cotton cylinder 6 is equipped with a flow-damping hood 7. The air inlet end of the flow-damping hood 7 is equipped with a buffer gasket 71 that mates with the connecting pipe 21. The air outlet end of the flow-damping hood 7 is fixedly connected with a mounting angle plate 72, and the mounting angle plate 72 is fixed to the bottom of the sound-absorbing cotton cylinder 6. The lower end of the sound-absorbing cover 4 is equipped with a threaded pressure plate 41 that is threadedly connected to the sound-absorbing outer shell 1. The lower surface of the threaded pressure plate 41 abuts against the upper surface of the support ring 82. The flow-damping hood 7 can buffer the airflow entering the sound-absorbing outer shell 1, reduce the impact of the flow velocity, reduce turbulence, and reduce noise.
[0035] It also includes a connecting mechanism 3, which includes an air outlet connector 31 installed in the middle of the upper surface of the muffler cover 4 and connected to the air outlet pipe 5. The air outlet connector 31 has grooves 32 on both sides, and a lever 33 is slidably arranged in the grooves 32. One end of the lever 33 is fixedly connected to a locking block 35. A spring 34 is provided in the grooves 32 to abut against the lever 33. The locking block 35 can be quickly connected to other pipes, improving the convenience of connection. At the same time, the spring 34 and the lever 33 facilitate the quick disengagement of the locking block 35 from other pipes, thereby facilitating disassembly.
[0036] In use, first check the integrity of the equipment, and then install the device through the air inlet pipe 2 and the connecting mechanism 3. The airflow enters the silencing shell 1 through the connector cover 22 of the air inlet pipe 2 and the connecting pipe 21. It is initially buffered by the flow damper 7 at the bottom of the silencing cotton tube 6 to reduce the airflow impact noise. The buffered airflow enters the silencing inner cylinder 81 and flows through the first silencing disc 87, the second silencing disc 88 and the third silencing disc 89 with decreasing apertures from top to bottom. At the same time, the airflow is forced to change direction and speed multiple times by the obstruction of the third silencing cover 86, the second silencing cover 85 and the third silencing cover 86 with increasing apertures. The sound wave energy is weakened by blocking and reflection, and the contact area and time between the airflow and the multi-stage silencing mechanism 8 are increased to enhance the silencing effect. At the same time, the silencing cotton tube 6 on the outside of the silencing inner cylinder 81 further absorbs the sound waves. The airflow after the effect is gathered by the flow collector 9 and discharged from the air outlet pipe 5 to achieve efficient silencing.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A muffler for a refrigerator, characterized by, include: The silencing housing (1), and the air inlet pipe (2) and the air outlet pipe (5) for airflow to enter and exit, wherein the top of the silencing housing (1) is equipped with a silencing cover (4) for the air outlet pipe (5) to be installed; A multi-stage silencing mechanism (8) installed inside the silencing housing (1) to connect the intake pipe (2) and the exhaust pipe (5); The multi-stage silencing mechanism (8) includes a silencing inner cylinder (81), a first silencing cover (84), a second silencing cover (85), and a third silencing cover (86). The first silencing cover (84), the second silencing cover (85), and the third silencing cover are installed in sequence from top to bottom on the inner wall of the silencing inner cylinder (81). The lower end of the first silencing cover (84), the lower end of the second silencing cover (85), and the lower end of the third silencing cover (86) are respectively equipped with a first silencing disc (87), a second silencing disc (88), and a third silencing disc (89).
2. A silencer for a refrigerator as defined in claim 1, characterized in that: The outer diameters of the first silencing disc (87), the second silencing disc (88), and the third silencing disc (89) decrease sequentially from top to bottom. The apertures of the first silencing disc (87), the second silencing disc (88), and the third silencing disc (89) decrease sequentially from top to bottom. The axes of the first silencing cover (84), the second silencing cover (85), and the third silencing cover (86) are all located on the same axis.
3. A silencer for a refrigerator as defined in claim 2, characterized in that: The outer upper end of the silencing inner cylinder (81) is integrally formed with a support ring (82), and the upper surface of the support ring (82) is provided with two sets of positioning holes (83). The inner wall of the silencing outer shell (1) is fixedly connected with a silencing cotton tube (6), and the upper opening of the silencing cotton tube (6) is fixedly connected with a protrusion (11) for the installation of the two sets of positioning holes (83).
4. A silencer for a refrigerator as defined in claim 3, characterized in that: The inner wall of the sound-absorbing cotton tube (6) is fixedly connected with a limiting ring (10) that supports the sound-absorbing inner tube (81). The inner diameter of the limiting ring (10) is the same as the inner diameter of the sound-absorbing inner tube (81). The lower end of the air outlet pipe (5) is provided with a flow collector (9).
5. A sound suppressor for a refrigeration machine according to claim 4, characterized in that: The intake pipe (2) is mainly composed of a connecting pipe (21) and a connector cover (22). The connector cover (22) is installed at one end of the connecting pipe (21). The outer side of the muffler housing (1) is provided with an installation pipe (12) for threaded connection of the connecting pipe (21). A sealing gasket (23) is provided at the outer side of the connecting pipe (21) near the connector cover (22).
6. A sound suppressor for a refrigeration machine according to claim 5, characterized in that: The bottom of the sound-absorbing cotton tube (6) is provided with a flow-slowing hood (7). The air inlet end of the flow-slowing hood (7) is provided with a buffer gasket (71) that is connected to the connecting pipe (21). The air outlet end of the flow-slowing hood (7) is fixedly connected with an installation angle plate (72), and the installation angle plate (72) is fixed to the bottom of the sound-absorbing cotton tube (6). The lower end of the sound-absorbing cover (4) is provided with a threaded pressure plate (41) that is threadedly connected to the sound-absorbing outer shell (1), and the lower surface of the threaded pressure plate (41) abuts against the upper surface of the support ring (82).
7. A sound suppressor for a refrigeration machine as defined in claim 1, wherein: It also includes a connecting mechanism (3), which includes an air outlet connector (31) installed in the middle of the upper surface of the muffler cover (4) and connected to the air outlet pipe (5). The air outlet connector (31) has grooves (32) on both sides, and a lever (33) is slidably arranged in the groove (32). One end of the lever (33) is fixedly connected to a locking block (35), and a spring (34) is provided in the groove (32) to abut against the lever (33).