A partition and compressor with Helmholtz silencer

Abstract

The present invention provides a Helmholtz muffler baffle and compressor. The inner cavity of the liquid reservoir cylinder is further provided with a baffle, and the muffler is mounted on the baffle. The muffler comprises a connected cavity and a channel. The channel is open at both ends. The opening at one end of the channel is connected to and communicates with the cavity, while the opening at the other end of the channel is provided in and communicates with the inner cavity of the liquid reservoir cylinder. The cavity communicates with the inner cavity of the liquid reservoir cylinder via the channel. This invention effectively improves transmission loss in the target frequency band and suppresses noise from the indoor unit of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the field of compressors, in particular to a noise-reducing diaphragm with a Helmholtz silencer and a compressor having the same. Background Art

[0002] The liquid accumulator (also called liquid storage cylinder) in the refrigeration system is installed between the evaporator and the suction port of the compressor cylinder and is part of the compressor.

[0003] The liquid accumulator is an indispensable component of the compressor, which plays the role of storage, gas-liquid separation, filtering, silencing and refrigerant buffering. It consists of an air inlet pipe, a cylinder, a filter, a filter bracket, an air intake pipe and other parts.

[0004] The accumulator connects the air conditioning system's piping to the compressor's intake port, preventing the system's liquid refrigerant from entering the compressor cylinder, potentially impacting system reliability, and attenuating noise in certain frequency bands. However, vibrations from the compressor's operation can be transmitted to the accumulator, causing vibration noise. Refrigerant flow and pressure pulsations can also cause accumulator noise, which can even be transmitted to the air conditioner's indoor unit, causing transmission noise.

[0005] Therefore, those skilled in the art are committed to developing a Helmholtz muffler baffle and a compressor having the same that can effectively improve the transmission loss of a target frequency band and suppress the noise of an air conditioner indoor unit. Summary of the Invention

[0006] In view of the problems in the prior art, the purpose of the present invention is to provide a Helmholtz silencer baffle and a compressor having the same, which effectively improves the transmission loss in the target frequency band and suppresses the noise of the air conditioner indoor unit.

[0007] According to one aspect of the present invention, a baffle with a Helmholtz silencer is suitable for a liquid reservoir of a compressor, wherein the liquid reservoir includes a cylinder having an inner cavity provided therein, a baffle provided in the inner cavity of the liquid reservoir cylinder, a muffler provided on the baffle, and the muffler includes a connected cavity and a channel, both ends of the channel are open, the opening at one end of the channel is connected to and communicates with the cavity, the opening at the other end of the channel is provided in the inner cavity of the liquid reservoir cylinder and communicates with the inner cavity, and the cavity communicates with the inner cavity of the liquid reservoir cylinder through the channel.

[0008] Preferably, the volume s of the cavity of the muffler, the length l of the channel, and the cross-sectional area v of the channel satisfy:

[0009] Preferably, the cavity is in the shape of a ring, etc. The cross-section of the cavity is in the shape of a rectangle, a semicircle or a circle, etc. The channel is in the shape of a semi-cylinder, a cylinder, a triangular prism or a square prism, etc.

[0010] Preferably, a sound absorbing material is further provided in the cavity of the muffler.

[0011] Preferably, the sound absorbing material is a perforated plate or a porous material.

[0012] Preferably, the number of the plurality of silencers is ≥2.

[0013] Preferably, the volumes of the cavities of the respective silencers are different.

[0014] Preferably, the lengths of the channels of the respective silencers are different.

[0015] Preferably, the cross-sectional areas of the channels of the respective silencers are different.

[0016] Preferably, the partition is assembled from stamped parts.

[0017] Preferably, a straight tube is further provided in the inner cavity of the liquid storage cylinder, and the partition is sleeved on the straight tube.

[0018] According to another aspect of the present invention, a compressor is provided, comprising the liquid accumulator having the above-mentioned Helmholtz muffler partition.

[0019] The invention provides a Helmholtz muffler baffle and a compressor having the same, which effectively improves the transmission loss of a target frequency band and suppresses the noise of an air conditioner indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1 is a schematic structural diagram of a liquid reservoir according to an embodiment of the present invention;

[0022] Figure 2 1 is a schematic structural diagram of a Helmholtz muffler baffle according to an embodiment of the present invention;

[0023] Figure 3 1 is a schematic structural diagram of a Helmholtz muffler baffle according to another embodiment of the present invention;

[0024] Figure 4 1 is a schematic structural diagram of a Helmholtz muffler baffle according to another embodiment of the present invention;

[0025] Figure 5 1 is a diagram of the test results of Example 1 of the present invention;

[0026] Figure 6 It is a test result diagram of Examples 2 and 3 of the present invention.

[0027] Reference numerals

[0028] 1 Reservoir cylinder

[0029] 2 Inner cavity

[0030] 3 straight pipe

[0031] 4 partitions

[0032] 5 Cavity

[0033] 6 channels

[0034] 7 Sound-absorbing materials DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures represent identical or similar structures, and thus a repeated description thereof will be omitted.

[0036] like Figure 1 and Figure 2 As shown in , in an embodiment of the present invention, a compressor with a Helmholtz silencer partition and the like is provided, preferably a rotary rotor compressor.

[0037] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0038] like Figure 1 As shown in FIG, the partition 4 of the embodiment of the present invention is sleeved on the straight tube 3. Preferably, one end of the partition 4 is fixed and sealed to the wall of the inner cavity 2 of the liquid reservoir cylinder 1, and the other end does not contact the straight tube 3, or both ends of the partition 4 do not contact the inner cavity 2 and the straight tube 3, or both ends of the partition 4 are fixed and sealed to the inner cavity 2 and the straight tube 3.

[0039] like Figure 2 As shown in FIG, in an embodiment of the present invention, a Helmholtz silencer is provided on the partition plate 4.

[0040] The muffler includes a cavity 5 and a channel 6 connected to each other. Both ends of the channel 6 are open, and the opening at one end of the channel 6 is connected to and communicates with the cavity 5. Figure 1 As shown in , the opening at the other end of the channel 6 is provided in the inner cavity 2 of the reservoir cylinder 1 and communicates with the inner cavity 2. Thus, the upper cavity 5 of the partition 4 communicates with the inner cavity 2 of the reservoir cylinder 1 through the channel 6, forming a partition with a Helmholtz silencer.

[0041] In an embodiment of the present invention, the frequency formula of the Helmholtz muffler is:

[0042]

[0043] Where, f is the muffler frequency, c is the speed of sound under different refrigerants, s is the cavity volume of the Helmholtz muffler, l is the channel length of the Helmholtz muffler, and v is the channel cross-sectional area of ​​the Helmholtz muffler.

[0044] It can be deduced that:

[0045]

[0046] Taking f as the anechoic frequency value of interest, ranging from 130 to 2000, and c as the value from 150 to 300, we get:

[0047] about

[0048] The preferred silencing frequency value is 200-2000, and c takes a value of 150-260, resulting in:

[0049] about

[0050] The invention provides a Helmholtz muffler baffle and a compressor having the same, which effectively improves the transmission loss of a target frequency band and suppresses the noise of an air conditioner indoor unit.

[0051] like Figure 1 and Figure 3 As shown in FIG, in an embodiment of the present invention, the cavity of the muffler is preferably in the shape of a ring, so that it is sleeved on the straight pipe 3 together with the partition plate 4.

[0052] Preferably, the cross section of the annular cavity is rectangular, semicircular or circular.

[0053] The channel is preferably in the shape of a semi-cylinder, a cylinder, a triangular prism or a square prism. The opening of the channel and the inner cavity 2 is preferably toward the straight tube 3, or toward the top or bottom of the inner cavity 2.

[0054] like Figure 2-4 As shown in , in the embodiment of the present invention, the silencer can be an integral silencer or a combination of multiple silencers.

[0055] In the case of a combination of multiple silencers, the shapes and sizes of the multiple silencers can be the same or different, and preferably have cavities of different volumes, and channels of different lengths and cross-sectional areas, so as to match different sound-absorbing frequencies.

[0056] like Figure 2 As shown in , in the embodiment of the present invention, it is preferred that the number of silencers on the partition 4 is ≥ 2, and preferably 4.

[0057] The sizes of the cavities 5 of the four silencers are not exactly the same, and the shape is a section of a ring. The cavities 5 of the four silencers form a ring as a whole, and the cross section is a semicircle.

[0058] It is preferred that the channels 6 of the four silencers have the same size and shape, and are all semi-cylindrical.

[0059] In addition, combined with Figure 1 As shown in FIG, the openings at the other ends of the channels 6 of the four silencers are preferably directed toward the straight pipe 3 .

[0060] like Figure 3 As shown in FIG, in an embodiment of the present invention, the number of mufflers on the partition 4 is preferably one. Each muffler has an overall annular cavity 5. The channel 6 can be formed by directly opening a hole in the cavity 5. Preferably, the channel 6 is composed of a plurality of small holes.

[0061] In addition, combined with Figure 1 As shown in FIG, the direction of the opening of the channel 6 is preferably parallel to the straight tube 3 and preferably toward the bottom of the liquid reservoir.

[0062] The embodiments of the present invention ultimately ensure multiple noise reduction frequency bands through the combination of silencers of various shapes.

[0063] Another example Figure 4 As shown in , in an embodiment of the present invention, preferably, a sound absorbing material 7 is further provided in the muffler cavity 6, and preferably, the sound absorbing material 7 further divides the cavity 6 into two or more smaller interconnected small cavities.

[0064] The sound absorbing material 7 is preferably a perforated plate or a porous material. Furthermore, the perforation direction of the perforated plate or the porous material is preferably parallel to the direction of the channel 5 to improve the transmission loss.

[0065] Furthermore, in embodiments of the present invention, the reservoir partition with the Helmholtz muffler is preferably assembled from several stamped parts or integrally formed. More preferably, it is formed from two stamped parts. The stamped parts have multiple chambers and channels, and corresponding positioning holes to ensure accurate assembly of the components.

[0066] like Figure 2-4 As shown in FIG, in the embodiment of the present invention, the partition 4 is preferably composed of a stamping part and a flat plate, and no positioning requirement is required.

[0067] In the embodiment of the present invention, the volume of the partition muffler cavity is preferably 100 to 30000 mm 3 The length of the channel is 1 to 40 mm, and the cross-sectional area of ​​the channel is 1.5 to 2830 mm. 2 .

[0068] In the case of a built-in perforated plate or porous material, the perforation rate of the perforated plate or porous material is 0.5-5%, and the diameter of the small holes is 0.2-1.0 mm.

[0069] The present invention is described below with specific embodiments:

[0070] Example 1

[0071] like Figure 1 and Figure 2 As shown in , a liquid accumulator partition and a compressor having the same, wherein the compressor includes a liquid accumulator.

[0072] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0073] The partition plate 4 is sleeved on the straight pipe 3. Four Helmholtz silencers are provided on the partition plate 4.

[0074] The first muffler comprises a first cavity 5 and a first channel 6 connected to each other. The first channel 6 is open at both ends, with one end opening connected to and communicating with the first cavity 5. The other end opening of the first channel 6 is located within and communicates with the inner cavity 2 of the reservoir cylinder 1. Thus, the first cavity 5 on the partition 4 communicates with the inner cavity 2 of the reservoir cylinder 1 through the first channel 6, forming a partition with a Helmholtz muffler.

[0075] The structures of the remaining three silencers are the same as the first silencer. The sizes of the cavities of the four silencers are not all the same. They are connected to form a ring as a whole, and the cross-section is semicircular. The cavity volume of the four silencers is 523mm 3 、695mm 3 , 813mm 3 、1072mm 3 .

[0076] The channels of the four silencers are of the same size and shape, all of which are semi-cylindrical. The channel length is 5.8mm and the channel cross-section is 1.9mm. 2 .

[0077] Through calculation, each silencer The calculation results are: 47, 63, 74, 97.

[0078] Control experiment 1

[0079] like Figure 5 As shown in , Example 1 is installed in the compressor accumulator, and the sound absorption (TL / dB, transmission loss, inlet sound pressure minus outlet sound pressure, i.e., sound loss) under different frequency sound waves (f / Hz) before and after installation is detected respectively. The calculation parameter conditions are R32 refrigerant, inlet pressure 0.84 MPa, and temperature 10°C.

[0080] It can be seen that after the partition of Example 1 is installed, the sound absorption of the liquid storage container is significantly improved at a frequency of about 400 and about 700.

[0081] Example 2

[0082] like Figure 1 and Figure 4 As shown in , a Helmholtz muffler partition and a compressor having the same, wherein the compressor includes a liquid accumulator.

[0083] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0084] The partition plate 4 is sleeved on the straight pipe 3. Five Helmholtz silencers are provided on the partition plate 4.

[0085] Each of the five silencers includes a connected cavity 5 and a channel 6. Each channel 6 is open at both ends, with one end opening connected to and communicating with the respective cavity 5. The other end opening of each channel 6 is located within the inner cavity 2 of the reservoir cylinder 1 and communicates with the respective inner cavity 2. Thus, the cavities 5 of the five silencers on the partition 4 communicate with the inner cavity 2 of the reservoir cylinder 1 through their respective channels 6, forming a partition with five Helmholtz silencers.

[0086] The sizes of the cavities 5 of the five silencers are different, forming a ring shape as a whole, and the cross-sections are all semicircular. The volumes of the cavities of the five silencers are 500, 588, 671, 749, and 821 mm respectively. 3 .

[0087] The channels 6 of the five silencers are of the same size and shape, all of which are semi-cylindrical. The length of each channel 6 is 5.8 mm, and the cross section of each channel 6 is 1.9 mm. 2 .

[0088] 5 silencers each The calculation results are 45, 53, 61, 68, and 75.

[0089] Example 3

[0090] Each of the five mufflers in Example 2 is equipped with an arc-shaped perforated plate. The perforated plate divides the cavity 5 of each muffler into two interconnected sections. The arc-shaped perforated plate in each of the five mufflers is generally annular in shape. The perforation direction of the perforated plate is parallel to the direction of the channel 5.

[0091] The perforation rate of the perforated plate is 4.5% and the diameter of the small hole is 0.5 mm.

[0092] Control experiment 2

[0093] like Figure 6 As shown in , Examples 2 and 3 were installed in the compressor accumulator, and the sound absorption (TL / dB, transmission loss, inlet sound pressure minus outlet sound pressure, i.e., sound loss) under different frequency sound waves (f / Hz) before and after installation was detected, wherein the calculation parameter conditions were R32 refrigerant, inlet pressure 0.84 MPa, and temperature 10°C.

[0094] It can be seen that after installing the baffles of Example 2, the sound absorption of the liquid reservoir was significantly improved at frequencies around 400, 600-700, and 900. After installing the baffles of Example 3, the sound absorption of the liquid reservoir was significantly improved at frequencies around 400, 600-800, and 900, and the transmission loss between 600 and 800 Hz was improved.

[0095] Example 4

[0096] like Figure 1 As shown in , a Helmholtz muffler partition and a compressor having the same, wherein the compressor includes a liquid accumulator.

[0097] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0098] The partition plate 4 is sleeved on the straight pipe 3. Four Helmholtz silencers are provided on the partition plate 4.

[0099] The four silencers each include a cavity 5 and a channel 6 connected to each other.

[0100] The cavity volumes of the four silencers are 100, 100, 150, and 250 mm respectively. 3 .

[0101] The channels 6 of the four silencers are of the same size and shape, all of which are semi-cylindrical. The length of each channel 6 is 1mm, and the cross section of each channel 6 is 1.5mm. 2 .

[0102] 4 silencers each The calculation results are 67, 67, 100, 167.

[0103] The perforated plates of the four silencers each have a perforation rate of 0.5% and a small hole diameter of 0.2 mm.

[0104] Example 5

[0105] like Figure 1 As shown in , a Helmholtz muffler partition and a compressor having the same, wherein the compressor includes a liquid accumulator.

[0106] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0107] The partition plate 4 is sleeved on the straight pipe 3. A Helmholtz silencer is provided on the partition plate 4.

[0108] The muffler comprises a cavity 5 and a channel 6 connected to each other.

[0109] The volume of cavity 5 is 30000mm 3 .

[0110] Channel 6 has a length of 1.2 mm and a cross-sectional area of ​​2830 mm 2 .

[0111] silencer The result is 9.

[0112] The perforated plate of each silencer has a perforation rate of 5% and a small hole diameter of 1 mm.

[0113] Example 6

[0114] like Figure 1 As shown in , a Helmholtz muffler partition and a compressor having the same, wherein the compressor includes a liquid accumulator.

[0115] The liquid storage device comprises a cylinder 1, in which an inner cavity 2 is provided. A straight tube 3 is provided in the inner cavity 2.

[0116] The partition plate 4 is sleeved on the straight pipe 3. A Helmholtz silencer is provided on the partition plate 4.

[0117] The muffler comprises a cavity 5 and a channel 6 connected to each other.

[0118] The volume of cavity 5 is 3000mm 3 .

[0119] Channel 6 has a length of 40 mm and a cross-sectional area of ​​2 mm 2 .

[0120] silencer The result is 38.

[0121] The perforated plate of each silencer has a perforation rate of 2.5% and a small hole diameter of 0.8 mm.

[0122] In summary, the baffle with Helmholtz silencer and the liquid accumulator and compressor having the same according to the embodiments of the present invention reduce the pressure loss between the filter bracket and the intake pipe, thereby improving the performance of the compressor.

[0123] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A liquid accumulator with a Helmholtz muffler partition, suitable for a compressor, the liquid accumulator comprising a cylinder (1), an inner cavity (2) being provided in the cylinder (1), and characterized in that: A partition (4) is further provided in the inner cavity (2) of the liquid reservoir cylinder (1), and a muffler is provided on the partition (4). The muffler comprises a connected cavity (5) and a channel (6). Both ends of the channel (6) are open. The opening at one end of the channel (6) is connected to and communicates with the cavity (5), and the opening at the other end of the channel (6) is provided in the inner cavity (2) of the liquid reservoir cylinder (1) and communicates with the inner cavity (2). The cavity (5) communicates with the inner cavity (2) of the liquid reservoir cylinder (1) through the channel (6).

2. The baffle with Helmholtz silencer according to claim 1, characterized in that: The volume s of the cavity (5) of the muffler, the length l of the channel (6), and the cross-sectional area v of the channel (6) satisfy:

3. The baffle with Helmholtz silencer according to claim 1, characterized in that: Sound absorbing material is also provided in the cavity (5) of the muffler.

4. The baffle with Helmholtz silencer according to claim 3, characterized in that: The sound absorbing material is a perforated plate or a porous material.

5. The baffle with Helmholtz silencer according to claim 1, characterized in that: The number of the silencers is ≥2.

6. The baffle with Helmholtz silencer according to claim 5, characterized in that: The volumes of the cavities (5) of the various silencers are different.

7. The baffle with Helmholtz silencer according to claim 5, characterized in that: The lengths of the channels (6) of the respective silencers are different.

8. The baffle with Helmholtz silencer according to claim 5, characterized in that: The cross-sectional areas of the channels (6) of the respective silencers are different.

9. The baffle with Helmholtz silencer according to claim 1, characterized in that: The partition (4) is assembled from stamped parts.

10. A compressor, characterized in that: The invention comprises a baffle with a Helmholtz silencer according to any one of claims 1 to 9.

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