Silencer structure for air conditioner

Abstract

The utility model relates to the technical field of air conditioning devices, in particular to a silencer structure for an air conditioner, which comprises a silencing cavity section, two sides of the silencing cavity section are respectively provided with a cone-frustum-shaped transition connecting cavity section, and the outer side of each cone-frustum-shaped transition connecting cavity section is provided with a first cylindrical connecting pipe section. The connecting pipe comprises a second cylindrical connecting pipe section, and the inner end of the second cylindrical connecting pipe section penetrates through the first cylindrical connecting pipe section and the second arc to be arranged. The theoretical expansion ratio value of the silencer structure is the ratio of the diameter of the cross section circle of the silencing cavity section to the diameter of the second cylindrical connecting pipe section, and the distance between the second cylindrical connecting pipe section and the silencing cavity section in the horizontal direction is smaller than the distance between the silencing cavity section and the first cylindrical connecting pipe section in the horizontal direction in the prior art. The expansion ratio of the silencer structure is improved, and therefore the silencing and noise reduction effect of the silencer structure is guaranteed and improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning devices, and in particular to a muffler structure used for air-conditioning. Background Art

[0002] Air conditioning noise mainly comes from the outdoor unit. The noise caused by the vibration of the outdoor compressor pipeline and the internal refrigerant pressure pulsation is the most common. In order to reduce air conditioning noise, a muffler is installed on the air conditioning pipeline to reduce the noise problem.

[0003] At present, the commonly used silencer structures in air conditioners are Figure 1 As shown, it includes a muffler body 1 and a connecting pipe 2. The muffler body 1 is provided with connecting pipes 2 on both sides. The muffler body 1 includes a muffler cavity section 11. The muffler cavity section 11 is provided with truncated cone transition connecting cavity sections 12 on both sides. The truncated cone transition connecting cavity section 12 is connected to the muffler cavity section 11 through a first arc transition. The outer side of the truncated cone transition connecting cavity section 12 is provided with a first cylindrical connecting pipe section 13. The truncated cone transition connecting cavity section 12 is connected to the first cylindrical connecting pipe section 13 through a second arc 14. The cross-sectional circular diameter of the muffler cavity section 11 is greater than the cross-sectional circular diameter of the first cylindrical connecting pipe section 13. The connecting pipe 2 includes a second cylindrical connecting pipe section 21. The second cylindrical connecting pipe section 21 is matched and welded in the first cylindrical connecting pipe section 13 to connect the muffler body 1 and the connecting pipe 2 together. The connecting pipe is connected to the air conditioning pipeline. The muffler volume depends on the expansion ratio of the muffler. The larger the expansion ratio, the better the muffler noise reduction effect. Theoretically, when the silencer chamber section is directly connected to the first cylindrical connecting pipe section, the expansion ratio is the ratio of the cross-sectional circular diameter of the silencer chamber section to the first cylindrical connecting pipe section. However, due to machining limitations, a truncated cone-shaped transition connecting chamber section must be provided between the silencer chamber section and the first cylindrical connecting pipe section. The truncated cone-shaped transition connecting chamber section separates the silencer chamber section and the first cylindrical connecting pipe section by a certain distance in the horizontal direction, resulting in a decrease in the expansion ratio, which affects the sound-absorbing and noise-reducing effect of the silencer structure. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a muffler structure for an air conditioner with better muffler and noise reduction effect.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a silencer structure for an air conditioner, comprising a silencer body and a connecting pipe, connecting pipes are respectively arranged on both sides of the silencer body, the silencer body comprises a silencer cavity section, truncated cone-shaped transition connecting cavity sections are respectively arranged on both sides of the silencer cavity section, the truncated cone-shaped transition connecting cavity section is connected to the silencer cavity section through a first circular arc transition, a first cylindrical connecting pipe section is arranged on the outside of the truncated cone-shaped transition connecting cavity section, the truncated cone-shaped transition connecting cavity section is connected to the first cylindrical connecting pipe section through a second circular arc transition, the cross-sectional circular diameter of the silencer cavity section is larger than the cross-sectional circular diameter of the first cylindrical connecting pipe section, the connecting pipe comprises a second cylindrical connecting pipe section, the inner end portion of the second cylindrical connecting pipe section passes through the first cylindrical connecting pipe section and the second circular arc setting, and the inner end portion of the second cylindrical connecting pipe section is located in the truncated cone-shaped transition connecting cavity section or in the silencer cavity section.

[0006] Furthermore, the length of the second cylindrical connecting pipe section passing through the second arc is between 2-10 mm.

[0007] Furthermore, a plurality of refrigerant oil return holes are arranged on the circumference of the second cylindrical connecting pipe section, and the refrigerant oil return holes are located in the truncated cone-shaped transition connecting cavity section.

[0008] Furthermore, the length of the connecting pipe is greater than 40 mm.

[0009] Furthermore, the shape of the silencer cavity section is cylindrical.

[0010] Furthermore, the cross-sectional diameter of the silencer cavity section is D, the length of the truncated cone-shaped transition connection cavity section is S, and S is less than 0.7D.

[0011] The beneficial effect of the utility model is that the inner end of the second cylindrical connecting pipe section passes through the first cylindrical connecting pipe section and the second arc setting, and the inner end of the second cylindrical connecting pipe section is located in the truncated cone transition connecting cavity section or the muffler cavity section. Since the second cylindrical connecting pipe section passes through the first cylindrical connecting pipe section, the value of the expansion ratio of the muffler structure is theoretically the ratio of the cross-sectional circular diameter of the muffler cavity section to the second cylindrical connecting pipe section. Since the distance between the second cylindrical connecting pipe section and the muffler cavity section in the horizontal direction is smaller than the distance between the muffler cavity section and the first cylindrical connecting pipe section in the horizontal direction in the prior art, the expansion ratio of the muffler structure is improved, and the expansion ratio is closer to the theoretical value or equal to the theoretical value, thereby ensuring and improving the muffler and noise reduction effect of the muffler structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a muffler commonly used in the prior art;

[0013] Figure 2 It is a schematic diagram of the structure of the muffler of the utility model;

[0014] Marked as: silencer body 1 , silencer cavity section 11 , truncated cone transition connection cavity section 12 , first cylindrical connection pipe section 13 , second arc 14 , truncated cone transition connection cavity section 12 , connection pipe 2 , second cylindrical connection pipe section 21 . DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0016] This article involves the location and Figure 2 The position of each component in the figure is taken as the reference.

[0017] like Figure 2 As shown, the muffler structure of the utility model for an air conditioner comprises a muffler body 1 and a connecting pipe 2. The connecting pipes 2 are respectively arranged on both sides of the muffler body 1. The muffler body 1 comprises a muffler cavity section 11. The shape of the muffler cavity section 11 is cylindrical. Both sides of the muffler cavity section 11 are respectively provided with truncated cone-shaped transition connecting cavity sections 12. The truncated cone-shaped transition connecting cavity section 12 is connected to the muffler cavity section 11 through a first arc transition. A first cylindrical connecting pipe section 13 is arranged on the outer side of the truncated cone-shaped transition connecting cavity section 12. The truncated cone-shaped transition connecting cavity section 12 and the first cylindrical connecting pipe section 13 are connected to each other through a first arc transition. Through the transition connection through the second arc 14, the cross-sectional circular diameter of the silencer chamber section 11 is larger than the cross-sectional circular diameter of the first cylindrical connecting pipe section 13, and the connecting pipe 2 includes a second cylindrical connecting pipe section 21, the inner end of the second cylindrical connecting pipe section 21 passes through the first cylindrical connecting pipe section 13 and the second arc 14, and the inner end of the second cylindrical connecting pipe section 21 is located in the truncated cone-shaped transition connection chamber section 12 or the silencer chamber section 11, and the inner end of the second cylindrical connecting pipe section 21 refers to: an end in the second cylindrical connecting pipe section 21 that is closer to the silencer chamber section 11.

[0018] The theoretical expansion ratio of the silencer structure is the ratio of the cross-sectional circular diameter of the silencer chamber section 11 to the second cylindrical connecting pipe section 21. Since the horizontal distance between the second cylindrical connecting pipe section 21 and the silencer chamber section 11 is smaller than the horizontal distance between the silencer chamber section 11 and the first cylindrical connecting pipe section 13 in the prior art, the expansion ratio of the silencer structure is improved, and the expansion ratio is closer to or equal to the theoretical value. It is verified by noise tests that under the same test conditions, the noise value of the silencer structure of the utility model is reduced by 1.5-3dB, thereby ensuring and improving the silencing and noise reduction effect of the silencer structure.

[0019] The length of the second cylindrical connecting pipe section 21 passing through the second arc 14 should be moderate. If the length is too short, the silencing and noise reduction effect will not be improved. If the length is too long, it will affect the refrigerant oil return of the air conditioning pipeline system. Through a large number of tests and practices, it is found that in order to ensure the use effect of the silencer structure, the length of the second cylindrical connecting pipe section 21 passing through the second arc 14 is between 2-10mm. When the length of the second cylindrical connecting pipe section 21 passing through the second arc 14 is 5-10mm, in order to ensure the refrigerant oil return of the air conditioning pipeline system, a plurality of refrigerant oil return holes are arranged on the circumference of the second cylindrical connecting pipe section 21, and the refrigerant oil return holes are located in the truncated cone transition connection cavity section 12.

[0020] The muffler body 1 and the connecting pipe 2 are usually fixed by welding. To facilitate the welding operation, the length of the connecting pipe 2 is greater than 40 mm.

[0021] In order to increase the length ratio of the silencer cavity section 11 and improve the silencing and noise reduction effect, the cross-sectional diameter of the silencer cavity section 11 is D, and the length of the truncated cone-shaped transition connection cavity section 12 is S, where S<0.7D.

Claims

1. A silencer structure for an air conditioner, comprising a silencer body (1) and a connecting pipe (2), wherein the connecting pipes (2) are respectively arranged on both sides of the silencer body (1), the silencer body (1) comprises a silencer cavity section (11), and truncated cone-shaped transition connection cavity sections (12) are respectively arranged on both sides of the silencer cavity section (11), the truncated cone-shaped transition connection cavity section (12) is transitionally connected to the silencer cavity section (11) through a first circular arc, a first cylindrical connection pipe section (13) is arranged on the outer side of the truncated cone-shaped transition connection cavity section (12), the truncated cone-shaped transition connection cavity section (12) is transitionally connected to the first cylindrical connection pipe section (13) through a second circular arc (14), the cross-sectional circular diameter of the silencer cavity section (11) is greater than the cross-sectional circular diameter of the first cylindrical connection pipe section (13), and the connecting pipe (2) comprises a second cylindrical connection pipe section (21), characterized in that: The inner end of the second cylindrical connecting pipe section (21) passes through the first cylindrical connecting pipe section (13) and the second circular arc (14), and the inner end of the second cylindrical connecting pipe section (21) is located in the truncated cone-shaped transition connecting cavity section (12) or the muffler cavity section (11).

2. The muffler structure for an air conditioner according to claim 1, characterized in that: The length of the second cylindrical connecting pipe section (21) passing through the second arc (14) is between 2 and 10 mm.

3. The muffler structure for an air conditioner according to claim 2, characterized in that: A plurality of refrigerant oil return holes are arranged in the circumferential direction of the second cylindrical connecting pipe section (21), and the refrigerant oil return holes are located in the truncated cone-shaped transition connecting cavity section (12).

4. The muffler structure for an air conditioner according to claim 1, characterized in that: The length of the connecting pipe (2) is greater than 40 mm.

5. The muffler structure for an air conditioner according to any one of claims 1 to 4, characterized in that: The shape of the silencer chamber section (11) is cylindrical.

6. The muffler structure for an air conditioner according to claim 5, characterized in that: The cross-sectional diameter of the silencer cavity section (11) is D, and the length of the truncated cone-shaped transition connection cavity section (12) is S, where S is less than 0.7D.

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