Silencer for refrigeration pipeline of air conditioner

Abstract

The utility model discloses an air conditioner refrigeration pipeline silencer which comprises an inlet pipe and an outlet pipe, a silencer body is arranged between the inlet pipe and the outlet pipe, inner protruding teeth are formed on the silencer body, the inner ends of the inner protruding teeth are located on the central axis of the inlet pipe, the inner protruding teeth are axially distributed, and the inlet pipe and the outlet pipe are coaxially arranged. The inner convex teeth are distributed on the two sides of the central axis of the inlet pipe, and the inner convex teeth located on the two sides of the central axis of the inlet pipe are distributed in a staggered mode. The air conditioner refrigeration pipeline silencer is relatively simple in structure and good in silencing effect.

Description

Technical Field

[0001] The utility model relates to the field of silencers for refrigeration pipelines, in particular to a silencer for refrigeration pipelines of air conditioners. Background Art

[0002] At present, in the refrigeration pipeline system, the capillary tube is an important throttling element. The capillary tube outlet is connected to the evaporator, and the refrigerant is converted from liquid to gas in the evaporator to achieve heat transfer. The flow resistance of the refrigerant increases continuously along the length of the capillary tube. When the pressure of the refrigerant drops below the saturated vapor pressure, the refrigerant will vaporize, and the refrigerant mostly exists in a gas-liquid two-phase state. Due to the increase in the diameter of the evaporator pipeline at the connection between the capillary tube and the evaporator, an under-expanded supersonic jet phenomenon will appear in the evaporator tube. The violent mixing of the gas-liquid two-phase will stimulate strong jet noise and bubbling sound, which seriously affects the quiet experience of the refrigeration equipment. Existing silencers used to be arranged in refrigeration pipes, some silencers achieve a certain degree of silencer effect by changing the flow cross-sectional area, but because the silencer maintains a straight sound wave channel, the silencer effect is not good. For example, in the "A Refrigeration System Special Muffler" with the Chinese Utility Model Patent Publication No. CN205101199U, the fluid forms violent turbulence in its first cavity and second cavity, so even if the air inlet pipe, the first flow channel, the second flow channel and the air outlet pipe are coaxial (straight-through) settings, the flow resistance is very obvious for the fluid, and due to its straight-through structure, the sound waves can easily pass through the silencer. Some silencers have complex internal structures. Due to the limited volume of silencers used in refrigeration pipelines, complex internal structures are set in a small space. Although the silencing effect is remarkable, the obstruction to the fluid obviously affects the normal circulation of the refrigerant. Moreover, it is not only difficult to process, but also difficult to assemble. For example, the Chinese utility model patent publication number is CN207990939U "A silencer for air-conditioning refrigeration pipelines", which is provided with equidistantly arranged silencer pipes, and small holes are opened on the cylindrical wall of the silencer pipes. The above structure is complex and not easy to manufacture and assemble; therefore, it is necessary to improve the silencers used in refrigeration pipelines in the prior art. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide an air-conditioning refrigeration pipeline silencer, which has a relatively simple structure and a good silencing effect.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] The utility model discloses an air-conditioning refrigeration pipeline silencer, comprising an inlet pipe and an outlet pipe, wherein a silencer body is arranged between the inlet pipe and the outlet pipe, wherein the silencer body is formed with inner convex teeth, the inner ends of the inner convex teeth are located on the central axis of the inlet pipe, the inner convex teeth are axially distributed, the inlet pipe and the outlet pipe are coaxially arranged, the inner convex teeth are distributed on both sides of the central axis of the inlet pipe, and the inner convex teeth located on both sides of the central axis of the inlet pipe are staggered with each other.

[0006] Preferably, the inner convex teeth are configured as V-shaped teeth.

[0007] Preferably, the inner convex teeth are gradually pointed in a direction from the inlet pipe to the outlet pipe.

[0008] Preferably, the inner protruding teeth are arranged at gradually smaller intervals in a direction from the inlet pipe to the outlet pipe.

[0009] Preferably, the inner convex teeth are formed with tooth tip rounded corners.

[0010] Preferably, a groove is formed on the outside of the muffler body, and the groove is located on the inner side of the corresponding inner protruding tooth.

[0011] Compared with the prior art, the utility model has the following beneficial effects: an inner convex tooth is formed on the muffler body, the inner end of the inner convex tooth is located on the central axis of the inlet pipe, the inner convex tooth is axially distributed, the inlet pipe and the outlet pipe are coaxially arranged, the inner convex teeth are distributed on both sides of the central axis of the inlet pipe, and the inner convex teeth on both sides of the central axis of the inlet pipe are staggered with each other, so the internal structure of the muffler body of the utility model is relatively simple, relatively easy to manufacture, and low in cost, avoiding the need for a complicated assembly process, and the muffler of the utility model has better noise weakening performance, that is, better silencing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a cross-sectional structural diagram of an air-conditioning refrigeration pipeline silencer.

[0013] Explanation of reference numerals: inlet pipe 1; central axis 11; outlet pipe 2; muffler body 10; fluid channel 100; inner convex teeth 3; tooth tip fillet 301; groove 30. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] The utility model of the air conditioning refrigeration pipeline silencer, such as Figure 1As shown, it includes an inlet pipe 1 and an outlet pipe 2, a muffler body 10 is arranged between the inlet pipe 1 and the outlet pipe 2, and the muffler body 10 is formed with an inner convex tooth 3. In other words, the inner convex tooth 3 is convex relative to the inner wall of the muffler body 10, and the inner end of the inner convex tooth 3 is located on the central axis 11 of the inlet pipe 1, that is, the inner convex tooth 3 protrudes from the outside to the inside to the central axis 11 of the inlet pipe 1, and the inner convex teeth 3 are axially distributed. In other words, the muffler body 10 is arranged in the total fluid flow direction from the inlet pipe 1 to the outlet pipe 2. A plurality of inner convex teeth 3 ( Figure 1 In the example shown in FIG. 3 , the inlet pipe 1 and the outlet pipe 2 are arranged coaxially. Figure 1 In the embodiment, the central axis 11 of the inlet pipe 1 is along the left-right direction, so the inner convex teeth 3 are distributed in the left-right direction; Figure 1 As shown, the inner convex teeth 3 are distributed on both sides of the central axis 11 of the inlet pipe 1. Figure 1 In the embodiment, a row of inner convex teeth 3 are provided on each side of the upper and lower sides of the central axis 11; Figure 1 As shown, the inner convex teeth 3 on both sides of the central axis 11 of the inlet pipe 1 are staggered and distributed to avoid the inner end of the inner convex tooth 3 located on the upper side of the central axis 11 from abutting against the inner end of the inner convex tooth 3 located on the lower side of the central axis 11, thereby forming a tortuous fluid channel 100 in the muffler body 10, and the left end of the fluid channel 100 is connected to the inlet pipe 1, and the right end of the fluid channel 100 is connected to the outlet pipe 2.

[0016] When the sound wave propagates from the inlet pipe 1 to the muffler body 10, Figure 1 As shown, since the inner end of the inner convex tooth 3 is located on the central axis 11 of the inlet pipe 1, the sound wave can hardly pass through the muffler body 10 in a straight line, but the sound wave is blocked and reflected step by step by the inner convex tooth 3. The sound wave is weakened in the muffler body 10 after complex reflection and interference, thereby achieving a significant muffler effect. In addition, the tortuous fluid channel 100 can also have a relatively large flow cross-sectional area and a relatively orderly wave-like flow channel structure, so the resistance to the fluid is relatively small and the turbulence is relatively light (relative to the structure of the Chinese utility model patent publication number CN207990939U "A muffler for air conditioning refrigeration pipeline"); since the internal structure of the muffler body 10 of the utility model only has the inner convex structure of the inner convex tooth 3, the internal structure of the muffler body 10 of the utility model is relatively simple, relatively easy to manufacture, and low in cost, avoiding the need for a complex assembly process; so the structure of the air conditioning refrigeration pipeline muffler of the utility model is relatively simple, and the muffler effect is also good.

[0017] Furthermore, if Figure 1As shown, the inner convex teeth 3 are set as V-shaped teeth, that is, the width of the inner convex teeth 3 (in the left-right direction) gradually decreases from the outside to the inside, so that the inner convex teeth 3 are in the shape of the English letter "V", and the inner convex teeth 3 are symmetrical structures with the radius direction of the muffler body 10 as the symmetry axis, so that the fluid channel 100 is obliquely circuitous (that is, not 180° circuitous). It can also be understood that because the wall of the inner convex teeth 3 is not perpendicular to the central axis 11, the wall of the inner convex teeth 3 plays an oblique flow guiding role on the fluid, thereby relatively reducing the muffler's obstruction to the fluid. Figure 1 As shown, the inner convex teeth 3 on the lower side of the central axis 11 are in an inverted "V" shape.

[0018] Furthermore, if Figure 1 As shown, the inner convex teeth 3 are gradually pointed in the direction from the inlet pipe 1 to the outlet pipe 2. More specifically, the shape of the inner convex teeth 3 located relatively on the right side (on the same side of the central axis 11) is more pointed than the shape of the inner convex teeth 3 located relatively on the left side. That is to say, Figure 1 The angle dimension "X" in the figure gradually decreases from left to right; when the fluid encounters the first inner convex tooth 3, the kinetic energy has been reduced, and as the fluid flows to the right, the fluid kinetic energy gradually weakens. Therefore, even if the obstruction of the inner convex tooth 3 on the fluid gradually increases from left to right, it will not cause severe turbulence in the fluid. For sound waves, through the above-mentioned arrangement, the blocking effect on sound waves becomes stronger and stronger, and due to the change in the shape of the above-mentioned inner convex tooth 3, it is beneficial to increase the frequency range of noise elimination, that is, to avoid that only noise of a specific frequency is significantly weakened.

[0019] Further, if Figure 1 As shown, the intervals between the inner convex teeth 3 in the direction from the inlet pipe 1 to the outlet pipe 2 are gradually reduced, that is, Figure 1 The dimension "L" in the figure gradually decreases. Through the above changes, the single silencer structure of the silencer body 10 is avoided, which is beneficial to increasing the frequency range of noise elimination.

[0020] Furthermore, if Figure 1 As shown, the inner convex tooth 3 is formed with a tooth tip fillet 301, so that the fluid can transition and change direction relatively smoothly at the inner end of the inner convex tooth 3, which can reduce the obstruction effect of the inner end of the inner convex tooth 3 on the fluid.

[0021] Furthermore, if Figure 1 As shown, a groove 30 is formed on the outside of the muffler body 10, and the groove 30 is located on the inner side of the corresponding inner convex tooth 3. In other words, the inner convex tooth 3 can be formed by processing the groove 30, so that the muffler can be made of a copper tube. The copper tube can be heated and softened first, and a V-shaped mold is used to press the shape of the groove 30 on the outer wall of the copper tube, so that the inner convex tooth 3 is formed accordingly, which is conducive to making the muffler easy to manufacture.

Claims

1. A silencer for an air conditioning refrigeration pipeline, comprising an inlet pipe (1) and an outlet pipe (2), wherein a silencer body (10) is arranged between the inlet pipe (1) and the outlet pipe (2), and characterized in that: The muffler body (10) is formed with an inner convex tooth (3), the inner end of the inner convex tooth (3) is located on the central axis (11) of the inlet pipe (1), the inner convex tooth (3) is axially distributed, the inlet pipe (1) and the outlet pipe (2) are coaxially arranged, the inner convex tooth (3) is distributed on both sides of the central axis (11) of the inlet pipe (1), and the inner convex teeth (3) located on both sides of the central axis (11) of the inlet pipe (1) are staggered and distributed with respect to each other.

2. The air conditioning refrigeration pipeline silencer according to claim 1, characterized in that: The inner convex teeth (3) are configured as V-shaped teeth.

3. The air conditioning refrigeration pipeline silencer according to claim 2 is characterized in that: The inner convex teeth (3) are arranged to become increasingly pointed one by one in the direction from the inlet pipe (1) to the outlet pipe (2).

4. The air conditioning refrigeration pipeline silencer according to claim 3 is characterized in that: The inner convex teeth (3) are arranged with gradually decreasing intervals in the direction from the inlet pipe (1) to the outlet pipe (2).

5. The air conditioning refrigeration pipeline silencer according to claim 3 is characterized in that: The inner convex teeth (3) are formed with tooth tip rounded corners (301).

6. The air conditioning refrigeration pipeline silencer according to claim 1, characterized in that: A groove (30) is formed on the outside of the muffler body (10), and the groove (30) is located on the inner side of the corresponding inner protruding tooth (3).

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