Silencing box for compressor

Abstract

The silencing box for the compressor comprises a main shell and a rear cover which are arranged in a mutually buckled mode, the top of the main shell is provided with an opening, and the rear cover is fixedly installed on the top of the main shell. A flow guide cavity is formed in the main shell; the flow guide cavity comprises an air inlet area and a noise elimination area which are communicated with each other, the air inlet area is integrally in a disc shape, meanwhile, an air inlet pipe is arranged on the rear cover, the air inlet pipe is communicated with the air inlet area, and the air inlet pipe is located in the center of the air inlet area. The silencing area is provided with two groups of silencing flow channels which are symmetrically arranged, the whole silencing flow channels are snake-shaped and are bent for at least three times, and meanwhile, the bent parts of the silencing flow channels are arranged in a circular arc transition manner; one end of the silencing flow channel is communicated with the air inlet area; the volume ratio of the flow guide cavity in the main shell is large, and the space utilization rate is high; the silencing box for the compressor can be made to be smaller.

Description

Technical Field

[0001] The utility model relates to the field of mufflers, in particular to a muffler box for a compressor. Background Art

[0002] While household refrigerators bring convenience, they also bring annoyance. The impact of refrigerator unit noise on the environment and the room in which it is used has become widely recognized. As the heart of the refrigerator, the compressor is the primary source of noise. This noise originates from friction and collision between moving parts, as well as eddy currents generated by gas flow. Currently, the primary method for noise reduction is to install an air intake silencer at the compressor intake to attenuate this noise.

[0003] For example, patent publication number CN220909936U discloses a silencer box for a refrigerator compressor. This utility model comprises an assembled box body with two communicating ports on the top and side of the box body for compressor air to pass through. A vibration-absorbing rectifier tube is fixedly mounted in the box body, and a flow-guiding and sound-absorbing structure is provided inside the tube body. An air inlet is provided on the side of the box body that communicates with the port of the vibration-absorbing rectifier tube. Compared with the prior art, this utility model has the following beneficial effects:

[0004] When the refrigerator compressor muffler of the above patent is in use, the compressed air flow of the compressor enters the vibration absorbing rectifier tube from the air inlet end of the vibration absorbing rectifier tube, is rectified and silenced by the bending structure and the sound-absorbing guide plate inside the vibration absorbing rectifier tube, and the vibration of the vibration absorbing rectifier tube is further reduced by being surrounded and filled with a rubber tube and a silicone sponge, thereby effectively reducing the noise. However, in the prior art, the space at the compressor of the refrigerator is small, and the position available for the installation of the muffler is also small. The flow channel in the above patent accounts for a small proportion of the entire device, and the space utilization rate is poor.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the present utility model is to provide a muffler box for a compressor to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A silencer box for a compressor comprises a main shell and a back cover which are interlocked with each other, the top of the main shell being opened and the back cover being fixedly mounted on the top of the main shell; a guide cavity is provided inside the main shell; the guide cavity comprises an air intake area and a silencer area which are interconnected, wherein the air intake area is disc-shaped as a whole, and an air intake pipe is provided on the back cover, the air intake pipe is connected to the air intake area and is located at the center of the air intake area; the silencer area is provided with two groups of symmetrical silencer flow channels, wherein the silencer flow channels are serpentine as a whole and are bent at least three times, and the bending parts of the silencer flow channels are arranged in a circular arc transition; one end of the silencer flow channel is connected to the air intake area, an exhaust hole is provided on the side wall of the main shell, and the other end of the silencer flow channel is connected to the exhaust hole.

[0009] Furthermore, the main shell and the back cover are both injection-molded parts.

[0010] Furthermore, a threaded connection column is integrally formed on the inner side wall of the guide cavity of the main shell, and a threaded hole is formed on the top of the threaded connection column.

[0011] Furthermore, the back cover is provided with a plurality of countersunk holes, which are arranged in a one-to-one correspondence with the threaded holes. The main shell and the back cover are fixed by threading screws in the countersunk holes and the threaded holes.

[0012] Furthermore, a connecting ear is provided on the outer side wall of the main shell and extends outward.

[0013] Furthermore, a nylon coating is sprayed on the inner wall of the diversion cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The airflow is decelerated in the curved serpentine silencer flow channel, reducing vibration and effectively reducing the noise pollution generated by the compressor; at the same time, the rough nylon coating on the surface can reduce the noise generated by the impact of high-pressure gas on the guide cavity;

[0016] In this solution, the guide chamber occupies a large volume in the main shell and has a high space utilization rate; thus, the compressor silencer can be made smaller while obtaining the same size of the guide chamber (corresponding to the flow channel in the comparative document). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a structural diagram of a silencer box for a compressor.

[0018] Figure 2 This is a front view of a silencer box for a compressor.

[0019] Figure 3 A side view of a silencer box for a compressor.

[0020] Figure 4 This is a top view of a silencer box for a compressor.

[0021] Figure 5 This is a structural schematic diagram of the main shell in a silencer box for a compressor.

[0022] Figure 6 This is a schematic structural diagram of the main shell of a compressor silencer from another angle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-6 A compressor muffler box includes a main shell 1 and a rear cover 2 that are interlocked.

[0025] The main housing 1 is provided with an opening at the top, and the rear cover 2 is fixedly mounted on the top of the main housing 1; a guide cavity 3 is provided inside the main housing 1;

[0026] Specifically, a threaded connection column 101 is integrally formed on the inner side wall of the diversion cavity 3 of the main housing 1. A threaded hole 102 is formed on the top of the threaded connection column 101. At the same time, a plurality of countersunk holes 201 are formed on the back cover 2. The countersunk holes 201 are arranged in a one-to-one correspondence with the threaded holes 102. Screws are connected by threading the countersunk holes 201 and the threaded holes 102 to fix the main housing 1 and the back cover 2.

[0027] At the same time, the outer wall of the main housing 1 is provided with a connecting ear 103 extending outward.

[0028] The guide cavity 3 includes an air intake area 301 and a muffler area 302 that are interconnected. The air intake area 301 is generally disc-shaped. The rear cover 2 is provided with an air intake pipe 202 that is connected to the air intake area 301 and is located at the center of the air intake area 301.

[0029] The muffler zone 302 is provided with two sets of symmetrically arranged muffler channels 303, wherein the muffler channels 303 are serpentine in shape and bend at least three times, and the bends of the muffler channels 303 are arranged in an arc transition; one end of the muffler channels 303 is connected to the air inlet zone 301, and an exhaust hole 304 is opened on the side wall of the main shell 1, and the other end of the muffler channels 303 is connected to the exhaust hole 304;

[0030] The inner wall of the guide cavity 3 is sprayed with a nylon coating 4, which has excellent wear resistance, corrosion resistance, high temperature resistance and adhesion. The rough surface of the nylon coating 4 can reduce the noise generated by the impact of high-pressure gas on the guide cavity 3.

[0031] When this solution is put into use, the high-speed airflow discharged from the compressor enters the air intake area 301 from the air intake pipe 202. These airflows enter the two silencer flow channels 303 in the air intake area 301. The airflows are decelerated in the curved serpentine silencer flow channels 303, reducing vibration and effectively reducing the noise pollution generated by the compressor; at the same time, the rough surface nylon coating 4 can reduce the noise generated by the impact of high-pressure gas on the guide cavity 3.

[0032] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," "right," and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use, or the positions or locations commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A muffler box for a compressor, comprising a main shell and a rear cover that are interlocked and arranged, characterized in that: The top of the main shell is opened, and the back cover is fixedly installed on the top of the main shell; a guide cavity is provided inside the main shell; the guide cavity includes an air intake area and a silencer area that are interconnected, wherein the air intake area is disc-shaped as a whole, and an air intake pipe is provided on the back cover, and the air intake pipe is connected to the air intake area and is located at the center of the air intake area; the silencer area is provided with two groups of symmetrical silencer flow channels, wherein the silencer flow channels are serpentine as a whole and are bent at least three times, and the bending parts of the silencer flow channels are arranged in a circular arc transition; one end of the silencer flow channel is connected to the air intake area, an exhaust hole is provided on the side wall of the main shell, and the other end of the silencer flow channel is connected to the exhaust hole.

2. A compressor muffler box according to claim 1, characterized in that: The main shell and the back cover are both injection-molded parts.

3. A compressor muffler box according to claim 1, characterized in that: A threaded connection column is integrally formed on the inner side wall of the guide cavity of the main shell, and a threaded hole is opened on the top of the threaded connection column.

4. A compressor muffler box according to claim 3, characterized in that: The back cover is provided with a plurality of countersunk holes, which are arranged in a one-to-one correspondence with the threaded holes. The main shell and the back cover are fixed by screws threadedly connected in the countersunk holes and the threaded holes.

5. The compressor muffler box according to claim 1, characterized in that: A connecting ear is provided on the outer side wall of the main shell and extends outward.

6. A compressor muffler box according to claim 1, characterized in that: The inner wall of the diversion cavity is sprayed with a nylon coating.

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