Flanges, pump assemblies, compressors and air conditioners

Abstract

The present application provides a flange, a pump assembly, a compressor, and an air conditioner, each comprising a flange body, an exhaust port disposed on the flange body, the exhaust port having an exhaust channel, and at least one guide groove disposed on the inner wall of the exhaust channel, the guide groove communicating with the exhaust channel to reduce exhaust noise from the exhaust channel. The flange provided in an embodiment of the present invention can reduce the size of large vortices within the channel, reduce vortex shedding, and reduce airflow pulsation, thereby reducing exhaust noise.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and specifically relates to a flange, a pump assembly, a compressor and an air conditioner. Background Art

[0002] Noise from household air conditioners is a significant factor affecting residents' comfort, and compressor noise is the primary source of noise in air conditioning systems. Compressor noise is a complex component, primarily consisting of aerodynamic, mechanical, and electromagnetic noise. Aerodynamic noise primarily occurs in the exhaust area of the pump assembly, specifically the exhaust port on the upper flange. High air velocity near the compressor's exhaust valve seat, combined with a complex flow path structure and intense interaction between airflow and solid walls, causes airflow pulsation and significant airflow noise. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a flange, a pump body assembly, a compressor and an air conditioner that can weaken the large vortex scale in the channel, reduce vortex shedding, reduce air flow pulsation, and thus reduce the noise generated during exhaust.

[0004] In order to solve the above problems, the present application provides a flange, including a flange body, an exhaust port is provided on the flange body, the exhaust port has an exhaust channel, and at least one guide groove is provided on the inner wall of the exhaust channel, and the guide groove is communicated with the exhaust channel to reduce the exhaust noise of the exhaust channel.

[0005] Preferably, the guide groove includes at least one first-type guide groove, and the first-type guide groove extends spirally on the inner wall of the exhaust channel along the axial direction.

[0006] Preferably, the rise angle of the first type of guide groove is α, 25°≤α≤75.

[0007] Preferably, when at least two of the first-type guide grooves are included, the at least two first-type guide grooves are circumferentially spaced apart on the inner wall of the exhaust channel.

[0008] Preferably, when at least two of the first-type guide grooves are included, the at least two first-type guide grooves are evenly arranged on the inner wall of the exhaust channel in a circumferential direction.

[0009] Preferably, the exhaust channel includes a straight hole section and a first expansion section, the straight hole section is located on the upstream side of the exhaust channel, the first expansion section is located on the downstream side of the exhaust channel, the first end of the first type of guide groove is located on the inner wall of the straight hole section, and the second end of the first type of guide groove extends to the inner wall of the first expansion section.

[0010] Preferably, the rise angle of the first type of guide groove is α, the length of the straight hole section along the central axis is h1, the length of the exhaust channel along the central axis is h2, the number of the first type of guide grooves is n, the length of the first type of guide groove along the central axis of the exhaust channel is h, the groove wall of the guide groove is an arc surface, the diameter of the groove wall is d2, the cross-sectional area of each first type of guide groove is s, the length of a single first type of guide groove is h / (cosα), the total volume of the first type of guide groove is n×s×h / (cosα), 0.2mm≤d2≤1.8mm, and / or, 0.8h1≤h≤h1+0.8(h2-h1), and / or, 25°≤α≤75°.

[0011] Preferably, the guide groove includes at least one second-type guide groove, and the second-type guide groove extends circumferentially on the inner wall of the exhaust channel.

[0012] Preferably, when there are a plurality of the second-type guide grooves, the plurality of the second-type guide grooves extend in the same direction, and there are intervals between adjacent second-type guide grooves.

[0013] Preferably, the second type of guide groove forms a closed loop structure along the circumferential direction.

[0014] Preferably, the length of the second-type guide groove along the central axis of the exhaust channel is c, the length of the second-type guide groove along the circumferential direction of the exhaust channel is b, and 0≤c / b≤2.

[0015] Preferably, the second type of guide groove includes a plurality of unit segments, and adjacent unit segments are connected and arranged at an angle.

[0016] Preferably, the flange further includes a nested piece, the nested piece is sleeved in the exhaust port, and the guide groove is provided on the inner wall of the nested piece.

[0017] Preferably, the exhaust port includes a second expanding section and a narrowing section, the diameter of the second expanding section is larger than the diameter of the narrowing section, a first stop surface is formed between the second expanding section and the narrowing section, the nested part includes a first section and a second section, the outer diameter of the first section is larger than the outer diameter of the second section, a second stop surface is formed between the first section and the second section, the first section is located in the second expanding section, the second section is located in the narrowing section, and the first stop surface is in contact with the second stop surface.

[0018] Another aspect of the present invention provides a pump body assembly including the above-mentioned flange.

[0019] Another aspect of the present invention provides a compressor comprising the above-mentioned flange.

[0020] Preferably, the total volume of the guide groove is V1, the displacement of the compressor is V, and V1 / V≤0.01.

[0021] Another aspect of the present invention provides an air conditioner comprising the above-mentioned flange.

[0022] Beneficial effects

[0023] A flange provided in an embodiment of the present invention can reduce the size of large vortices in a channel, reduce vortex shedding, and reduce airflow pulsation, thereby reducing noise generated during exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the present application;

[0025] Figure 2 This is a front cross-sectional view of Example 1 of the present application;

[0026] Figure 3 This is an enlarged view of the exhaust port of Example 1 of the present application;

[0027] Figure 4 A top view of the exhaust port of Example 1 of the present application;

[0028] Figure 5 A comparison chart of noise data between the prior art and this embodiment;

[0029] Figure 6 This is a graph showing how the noise reduction amount of Example 1 of the present application changes with the length of the first type of guide groove along the central axis of the exhaust passage;

[0030] Figure 7 This is a graph showing how the performance parameters and noise reduction of the single-cylinder compressor of Example 1 of the present application change with the number of first-type guide grooves;

[0031] Figure 8 This is a graph showing how the noise reduction amount varies with the rise angle of the first type of guide groove in Example 1 of the present application;

[0032] Figure 9 This is a partial enlarged view of the flange body of Example 2 of the present application;

[0033] Figure 10 A cross-sectional view of a nested member according to Example 2 of the present application;

[0034] Figure 11 This is an enlarged view of the exhaust port of Example 2 of the present application;

[0035] Figure 12 This is a partial enlarged view of the flange of Example 3 of the present application;

[0036] Figure 13This is an enlarged view of the second type of guide groove in Example 3 of the present application;

[0037] Figure 14 This is an enlarged view of the exhaust port of Example 4 of the present application;

[0038] Figure 15 This is a diagram of the large vortex flow in the exhaust port in the prior art.

[0039] The reference numerals indicate:

[0040] 1. Flange body; 2. Exhaust port; 21. First type guide groove; 22. Second type guide groove; 3. Nesting element; d1. Diameter of the exhaust passage; h1. Length of the straight hole section along the central axis; h2. Length of the exhaust passage along the central axis; h. Length of the first type guide groove along the central axis of the exhaust passage; d2. Diameter of the guide groove wall; α. Rise angle of the guide groove; c. Length of the second type guide groove along the central axis of the exhaust passage; b. Length of the second type guide groove along the circumferential direction of the exhaust passage; d5. Inner diameter of the narrowing section; d6. Inner diameter of the second expanding section; d7. Outer diameter of the second section; d8. Outer diameter of the first section; h3. Length of the second expanding section along the axial direction; h4. Length of the first section along the axial direction;

[0041] h5, the length of the second section along the axial direction; △dB, the noise reduction; COP, the performance parameters of the single-cylinder compressor. DETAILED DESCRIPTION

[0042] See also Figures 1 to 4 As shown, according to Example 1 of the present application, a flange includes a flange body 1, an exhaust port 2 provided on the flange body 1, and an exhaust channel. The exhaust channel has at least one guide groove provided on the inner wall thereof, the guide groove communicating with the exhaust channel to reduce exhaust noise in the exhaust channel. By providing the guide groove on the inner wall of the exhaust channel, the large vortex size within the channel can be weakened, vortex shedding can be reduced, and airflow pulsation can be reduced, thereby reducing exhaust noise.

[0043] Furthermore, the guide groove is located on the inner wall of the exhaust channel, and the notch of the guide groove faces into the exhaust channel.

[0044] Furthermore, the guide groove guides the exhaust gas from the exhaust port 2 along the inner wall of the exhaust passage, thereby reducing flow losses.

[0045] The guide groove includes at least one first-type guide groove 21 , and the first-type guide groove 21 extends spirally on the inner wall of the exhaust passage along the axial direction.

[0046] As an embodiment, the first type of guide groove 21 spirally extends from the air inlet side of the exhaust passage to the air outlet side of the exhaust passage, and the first type of guide groove 21 extends in a periodic spiral.

[0047] The rise angle of the first type of guide groove 21 is α, 0°<α<90°, preferably, 25°≤α≤75. When the exhaust gas passes through the exhaust channel, the flow resistance of the wall flow is smaller under the guidance of the first type of guide groove 21. The micro-groove structure changes the wall boundary layer, making it difficult to maintain the original large vortex structure, which is conducive to reducing the scale of the large vortex, making the flow of exhaust gas in the exhaust channel more uniform, and reducing the generation of secondary vortices, thereby achieving the purpose of reducing airflow noise.

[0048] When at least two of the first-type guide grooves 21 are included, the at least two first-type guide grooves 21 are arranged at intervals along the circumferential direction on the inner wall of the exhaust channel, ensuring a better guiding effect on the exhaust gas and thereby reducing exhaust noise.

[0049] Furthermore, the projection of the first type of guide groove 21 in this embodiment on the vertical plane is a straight groove.

[0050] Furthermore, in this embodiment, the spiral direction of the first type of guide groove 21 is consistent with the rotation direction of the compressor crankshaft.

[0051] The exhaust channel includes a straight hole section and a first expansion section. The straight hole section is located on the upstream side of the exhaust channel, and the first expansion section is located on the downstream side of the exhaust channel. The first end of the first type of guide groove 21 is located on the inner wall of the straight hole section, and the second end of the first type of guide groove 21 extends to the inner wall of the first expansion section.

[0052] Furthermore, the entire first type of guide groove 21 is located in the exhaust channel, that is, in the straight hole section and the first expansion section.

[0053] Further, such as Figure 3 As shown, the first end of the first type of guide groove 21 in this embodiment is located at the lower edge end face of the exhaust port 2, that is, at the air inlet side of the exhaust port 2, and the second end of the first type of guide groove 21 extends obliquely upward, that is, extends obliquely toward the air outlet side of the exhaust port 2, and extends into the first expansion section.

[0054] The rise angle of the first-type guide groove 21 is α, the length of the straight hole section along the central axis is h1, the length of the exhaust channel along the central axis is h2, the number of first-type guide grooves 21 is n, the length of the first-type guide groove 21 along the central axis of the exhaust channel is h, the groove wall of the guide groove is an arc surface, the diameter of the groove wall is d2, the cross-sectional area of each first-type guide groove is s, the length of a single first-type guide groove is h / (cosα), the total volume of the first-type guide groove is n×s×h / (cosα), 0.2mm≤d2≤1.8mm, and / or, 0.8h1≤h≤h1+0.8(h2-h1), and / or, 25°≤α≤75°.

[0055] Furthermore, the rise angle is the minimum angle between the first type of guide groove 21 and the end surface of the exhaust port 2 .

[0056] 0.2mm≤d2≤1.8mm, and / or, 0.8h1≤h≤h1+0.8(h2-h1), and / or, 25°≤α≤75°.

[0057] Furthermore, 50°≤α≤65° is optimal.

[0058] Specifically, in this embodiment, the number of the first type of guide grooves 21 is 16, the diameter d2 of the groove wall of the first type of guide grooves 21 is 1 mm, that is, the cross section of the groove wall is arc-shaped, the diameter of the circle where the arc is located is 1 mm, and the groove depth of the first type of guide grooves 21 is 0.43 mm. In the prior art, no guide grooves are set in the exhaust channel, such as Figure 5 As shown, the noise value of this embodiment is lower than that of the prior art, especially in the range of 800-1500Hz and 1800-2100Hz, the noise improvement is even better.

[0059] like Figure 6 As shown, in the range of 0.8h1≤h≤h1+0.8(h2-h1), the noise is improved. When h=h1+0.5(h2-h1), the noise improvement is even better.

[0060] like Figure 7 As shown in the figure, the performance parameter COP and the noise reduction △dB of the single-cylinder compressor change with the number of the first-type guide grooves 21. When the number of the first-type guide grooves 21 is n, when n is 20, and the rise angle α of the guide groove is 60°, n×s×h / (cosα)=0.0072V. It can be seen from the figure that the performance parameter COP of the single-cylinder compressor decreases with the increase of the number of the first-type guide grooves 21, and the noise reduction △dB is the opposite. When the number of the first-type guide grooves 21 is 10 to 20, it has the effect of reducing noise and has no obvious impact on performance.

[0061] like Figure 8As shown in the graph of the noise reduction amount changing with the rise angle of the first type of guide groove 21, the noise is improved in the range of 25°≤α≤75°, and the noise improvement is even better when 50°≤α≤65°.

[0062] Example 2

[0063] like Figure 9-11 As shown, the difference from Example 1 is that the flange further includes a nesting piece 3, which is sleeved in the exhaust port 2, and the guide groove is provided on the inner wall of the nesting piece 3. The provision of the nesting piece 3 facilitates the processing of the guide groove and improves the processing efficiency.

[0064] Furthermore, the inner diameter of the nested piece is the same as the diameter of the exhaust channel in Example 1, both being d1.

[0065] Furthermore, the nesting member 3 is interference-fitted with the exhaust port 2, which ensures connection strength while facilitating installation.

[0066] Furthermore, the nested part 3 can be made of a copper tube or high temperature and high pressure resistant rubber, which can reduce the airflow pulsation noise while further reducing the transmission of aerodynamic noise by increasing the structural damping, thereby achieving a good noise reduction effect.

[0067] The exhaust port 2 includes a second expansion section and a contraction section, the diameter of the second expansion section is larger than the diameter of the contraction section, and a first stop surface is formed between the second expansion section and the contraction section. The nested part 3 includes a first section and a second section, the outer diameter of the first section is larger than the outer diameter of the second section, and a second stop surface is formed between the first section and the second section. The first section is located in the second expansion section, and the second section is located in the contraction section, and the first stop surface is in contact with the second stop surface.

[0068] Furthermore, the inner diameter of the narrowing section is d5; the inner diameter of the second expanding section is d6; the outer diameter of the second section is d7; the outer diameter of the first section is d8; the length of the second expanding section in the axial direction is h3; the length of the first section in the axial direction is h4; the length of the first type of guide groove 21 in the direction of the central axis of the exhaust passage is h; the length of the second section in the axial direction is h5, h5=h-h4.

[0069] Example 3

[0070] like Figure 12 、 13 As shown, the difference between the embodiments 1 and 2 is that, in this embodiment, the guide groove includes at least one second type guide groove 22, and the second type guide groove 22 extends circumferentially on the inner wall of the exhaust passage. Figure 12As shown, the second type of guide grooves 22 are horizontally arranged along the inner wall of the exhaust passage. By providing the second type of guide grooves 22 on the inner wall of the exhaust passage, the wall boundary layer is changed, and large-scale vortices are decomposed into small-scale vortices to attenuate turbulent energy, thereby achieving the effect of noise reduction.

[0071] When there are multiple second-type guide grooves 22, the multiple second-type guide grooves 22 extend in the same direction, and there are gaps between adjacent second-type guide grooves 22. The second-type guide grooves 22 form a closed-loop structure along the circumferential direction, ensuring the noise reduction effect.

[0072] The length of the second type of guide groove 22 along the central axis of the exhaust passage is c, and the length of the second type of guide groove 22 along the circumferential direction of the exhaust passage is b, where 0≤c / b≤2. That is, the projection of the second type of guide groove 22 in the vertical plane can be a straight line or a curved line.

[0073] The second type of guide groove 22 includes a plurality of unit segments, and adjacent unit segments are connected and arranged at an angle to increase the volume of the guide groove.

[0074] Furthermore, the unit segments may be arc-shaped or straight-line-shaped. In this embodiment, the unit segments are straight-line-shaped, and the lengths of the unit segments are equal.

[0075] Furthermore, in this embodiment, the unit segments are connected to form a zigzag shape, and extend circumferentially along the inner wall of the exhaust passage to finally form a ring shape.

[0076] The following table shows the sound power ratio of the exhaust port 2 of the prior art, Example 1 and Example 3. The sound power LP is an indicator for measuring the noise level of the compressor. The smaller the sound power value, the lower the noise generated by the compressor. LO is the benchmark sound power value. The results show that the spiral microgroove solution is the best for reducing noise.

[0077]

[0078]

[0079] Example 4

[0080] like Figure 14 As shown, the difference from Example 3 is that the flange further includes a nesting piece 3, which is sleeved in the exhaust port 2, and the second type of guide groove 22 is provided on the inner wall of the nesting piece 3. The provision of the nesting piece 3 facilitates the processing of the guide groove and improves the processing efficiency.

[0081] The dimensions of the nesting member 3 in this embodiment are the same as those in the second embodiment.

[0082] Another aspect of this embodiment provides a pump body assembly including the above-mentioned flange.

[0083] Another aspect of this embodiment provides a compressor including the above-mentioned flange.

[0084] Preferably, the total volume of the guide groove is V1, the displacement of the compressor is V, V1 / V≤0.01, that is That is, the noise reduction capability is ensured without increasing the clearance volume too much.

[0085] In another aspect of this embodiment, an air conditioner is provided, comprising the above-mentioned flange.

[0086] A flange provided in an embodiment of the present invention can reduce the size of large vortices in a channel, reduce vortex shedding, and reduce airflow pulsation, thereby reducing noise generated during exhaust.

[0087] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0088] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A pump assembly comprising a flange, characterized in that: The flange comprises a flange body (1), an exhaust port (2) is provided on the flange body (1), the exhaust port (2) has an exhaust channel, at least one guide groove is provided on the inner wall of the exhaust channel, the guide groove is communicated with the exhaust channel, so as to reduce the exhaust noise of the exhaust channel; The guide groove comprises at least one first-type guide groove (21), wherein the first-type guide groove (21) extends spirally on the inner wall of the exhaust passage in the axial direction; The exhaust channel comprises a straight hole section and a first expansion section, the straight hole section is located on the upstream side of the exhaust channel, the first expansion section is located on the downstream side of the exhaust channel, the first end of the first type of guide groove (21) is located on the inner wall of the straight hole section, and the second end of the first type of guide groove (21) extends to the inner wall of the first expansion section; The first type of guide groove (21) has a rise angle of α, the length of the straight hole section along the central axis is h1, the length of the exhaust channel along the central axis is h2, the length of the first type of guide groove (21) along the central axis of the exhaust channel is h, the groove wall of the guide groove is an arc surface, the diameter of the groove wall is d2, 0.2mm≤d2≤1.8mm, h≤h1+0.8(h2-h1), 25°≤α≤75°; The spiral direction of the first type of guide groove (21) is consistent with the rotation direction of the crankshaft.

2. The pump assembly according to claim 1, characterized in that When at least two of the first-type guide grooves (21) are included, the at least two of the first-type guide grooves (21) are arranged at intervals along the circumferential direction on the inner wall of the exhaust channel.

3. The pump assembly according to claim 1, characterized in that When at least two of the first-type guide grooves (21) are included, the at least two first-type guide grooves (21) are evenly arranged circumferentially on the inner wall of the exhaust channel.

4. The pump assembly according to claim 1, characterized in that The flange further comprises a nested piece (3), the nested piece (3) being sleeved in the exhaust port (2), and the guide groove being arranged on the inner wall of the nested piece (3).

5. The pump assembly according to claim 4, characterized in that The exhaust port (2) includes a second expanding section and a contracting section, the diameter of the second expanding section is larger than the diameter of the contracting section, and a first stop surface is formed between the second expanding section and the contracting section. The nested part (3) includes a first section and a second section, the outer diameter of the first section is larger than the outer diameter of the second section, and a second stop surface is formed between the first section and the second section. The first section is located in the second expanding section, and the second section is located in the contracting section, and the first stop surface is in contact with the second stop surface.

6. A compressor, characterized in that: The utility model comprises a pump body assembly as described in any one of claims 1 to 5.

7. The compressor according to claim 6, characterized in that The total volume of the guide groove is V1, the displacement of the compressor is V, and V1 / V≤0.

01.

8. An air conditioner, characterized in that: The utility model comprises a pump body assembly as described in any one of claims 1 to 5.

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