A liquid reservoir with cavity mode noise elimination and an air-conditioning compressor

Abstract

The present invention discloses a liquid reservoir with cavity mode noise elimination and an air-conditioning compressor, which includes an arc-shaped liquid reservoir body. A perforated partition divides the inner cavity of the liquid reservoir body into an upper chamber and a lower chamber. A first resonance cavity and a second resonance cavity are respectively arranged on both sides of the lower chamber. Partition connectors are respectively arranged on both sides of the partition. One end of the partition connector is located in the upper chamber and the other end is located in the lower chamber. The middle part of the partition connector passes through the resonance cavity. A T-shaped connecting pipe is also arranged in the lower chamber between the first resonance cavity and the second resonance cavity. Through multiple gas-liquid separation technologies, this liquid reservoir can eliminate most of the gas noise while completing gas-liquid separation, improving the gas pulsation at the suction end, reducing the noise of the whole compressor, reducing the cavity resonance noise, avoiding abnormal vibration between the liquid reservoir and the whole machine, and making the whole machine more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning compressors, and particularly to a liquid receiver with cavity modal noise elimination and an air-conditioning compressor. Background Art

[0002] During the operation of an air-conditioning compressor, gas is inhaled, and the inhaled gas needs to pass through a liquid receiver for gas-liquid separation. The structure of the liquid receiver of the air-conditioning compressor shown in the attached instructions is a relatively common liquid receiver. The gas-liquid mixture enters through the suction port and is separated by a protruding structure. The liquid flows down to the bottom along the edge through the protrusion, and the gas enters the suction end of the compressor through the middle long tube. Figure 1 The air-conditioning industry mainly uses rotary compressors. Compressors generate noise during operation, including air flow noise, mechanical noise, electromagnetic noise, etc. Due to the limitation of the compact structure of the rotary compressor, there is not enough space like that of a piston compressor at both the suction end and the discharge end to arrange a muffler structure. At the discharge end, since it passes through the entire stator and rotor, the structure design of the exhaust muffler is simple, and the available muffler space is limited.

[0003] For example, the Chinese Utility Model Patent (Publication No.: CN215063024U) disclosed a muffling device, a liquid receiver and a compressor in 2021. The muffling device includes an annular partition plate, a first hollow sleeve arranged on the partition plate and at least one through hole penetrating the partition plate; the inner cavity of the first hollow sleeve is coaxially arranged with the partition plate, and the outer side wall of the first hollow sleeve is arranged along the inner circumference of the partition plate. Both the first hollow sleeve and the partition plate are used to sleeve on the outlet pipe of the liquid receiver; the outer circle of the partition plate is used to connect with the inner wall of the cylinder body of the liquid receiver. Although this liquid receiver uses a muffling device, the structure of the liquid receiver has not been improved, and the muffling effect brought by the muffling device is limited. A large number of muffling devices need to be stacked to achieve a better muffling effect, which is not conducive to space utilization.

[0004] Moreover, among the compressor noises, air flow noise is one of the main noise sources, and this noise is mainly caused by the high-pressure fluid pulsation at the suction end and the discharge end of the compressor. Due to the absence of a suction valve plate at the suction end, it is generally considered that the suction pulsation is weak and not the main noise optimization direction, but this is not the case in practice.

[0005]

[0006] In addition, due to the existence of a large amount of gas-liquid mixture state at the suction end during the air-conditioning refrigeration process, a liquid receiver is arranged at the suction end to separate gas and liquid to improve the refrigeration efficiency. However, since the mixing ratio is dynamic during the gas flow process, it causes cavity resonance noise in the cavity of the liquid storage tank. In severe cases, it will cause abnormal vibration of the entire liquid receiver, affecting the vibration of the whole machine. Generally, the liquid receiver is integrally fixed to the machine body through a connecting piece.​ Summary of the Invention

[0007] The object of the present invention is to provide a liquid reservoir and an air-conditioning compressor with the function of eliminating cavity modal noise in view of the problems existing in the prior art.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A liquid reservoir with the function of eliminating cavity modal noise, comprising an arc-shaped liquid reservoir body. An air inlet is provided above the liquid reservoir body, and an air outlet is provided below the liquid reservoir body. A partition is arranged inside the liquid reservoir body, and the partition divides the inner cavity of the liquid reservoir body into an upper chamber and a lower chamber. A first resonance cavity and a second resonance cavity are respectively arranged on both sides of the lower chamber. A plurality of oil leakage holes are arranged on the partition, and the oil leakage holes are arranged on the partition between the first resonance cavity and the second resonance cavity. Partition connectors are respectively arranged on both sides of the partition. One end of each partition connector is located in the upper chamber, and the other end is located in the lower chamber. The middle part of the partition connector passes through the first resonance cavity or the second resonance cavity and is provided with a ventilation hole. A T-shaped connecting pipe is further arranged in the lower chamber between the first resonance cavity and the second resonance cavity, and the lower end of the T-shaped connecting pipe is connected to the air outlet.

[0010] Through multiple gas-liquid separation technologies and various gas sound absorption technologies, this liquid reservoir can eliminate most of the gas noise while completing gas-liquid separation. It not only improves the gas pulsation at the suction end, reduces the noise of the whole compressor, but also reduces the cavity resonance noise, avoids abnormal vibration between the liquid reservoir and the whole machine, and has better stability of the whole machine. There is no need to set up a complex connection and fixing structure between the liquid reservoir and the compressor body.

[0011] After the partition divides the inner cavity of the liquid reservoir into an upper chamber and a lower chamber, when the gas-liquid mixture enters the upper chamber, the gas will be expanded and silenced and then enter the partition connectors on both sides. The partition can play a role in primary gas-liquid separation, and the liquid will fall onto the partition. When the gas entering the partition connector passes through the first resonance cavity and the second resonance cavity, it will be resonantly silenced by the resonance cavity. After the resonantly silenced gas enters the lower chamber, it will complete secondary gas-liquid separation under the action of the T-shaped connecting pipe, so that the gas discharged from the lower air outlet does not contain liquid and has less gas noise, ensuring that the gas sucked by the compressor is in a gas state.

[0012] The arrangement of the partition and the resonance cavity combines expansion silencing and resonance silencing, achieving a good noise reduction effect. The arrangement of the two resonance cavities can eliminate noises of different frequencies, and can also synergistically improve the sound absorption characteristics and eliminate noises of specific frequencies.

[0013] The arrangement of the oil leakage holes enables the separated liquid to fall and be discharged; the arrangement of the ventilation holes enables gas to enter the resonance cavity, and after circulating in the resonance cavity, noise reduction is completed; the T-shaped connecting pipe can not only play the role of gas-liquid separation, but also play the role of preventing backflow, without specially arranging an air intake backflow prevention structure in the liquid storage device to avoid affecting the efficiency.

[0014] Furthermore, a concave shallow groove is provided on the upper plane of the partition plate, and a pair of vertical plates are provided between the lower part of the partition plate and the lower chamber, and the first resonance cavity or the second resonance cavity is formed between the vertical plates and the lower chamber.

[0015] The arrangement of the shallow groove on the partition plate facilitates the collection and convergence of the liquid; the arrangement of the vertical plates can support the partition plate while forming the first resonance cavity and the second resonance cavity, so as to form an overall stable structure.

[0016] Furthermore, the oil leakage holes are arranged in several radially arranged rows, and 3 to 6 oil leakage holes are arranged in each row. Since the liquid storage device is of an arc structure, such an arrangement of the oil leakage holes can better adapt to the arc-shaped structure of the liquid storage device.

[0017] Furthermore, the partition plate connector includes an integrally connected vertical pipe part, a bent pipe part and a horizontal pipe part. The vertical pipe part passes through the partition plate and communicates with the upper chamber, and the horizontal pipe part passes through the first resonance cavity or the second resonance cavity and communicates with the lower chamber; the ventilation holes are arranged on the vertical pipe part or the bent pipe part.

[0018] With the partition plate connector of this structure, on the one hand, gas can smoothly enter the lower chamber from the upper chamber and pass through the resonance cavity for noise reduction, and on the other hand, the path of the gas is extended, so that the gas can be buffered and silenced, and the noise reduction effect is better; the arrangement of the partition plate connector enables the gas to pass through three chambers.

[0019] Furthermore, the T-shaped connecting pipe includes a horizontal connecting pipe and a vertical connecting pipe. The two ends of the horizontal connecting pipe face the first resonance cavity and the second resonance cavity respectively. The height of the horizontal connecting pipe is higher than the port where the partition plate connector communicates with the lower chamber. The vertical connecting pipe is not shorter than half of the lower chamber, and the vertical connecting pipe passes through the air outlet and is connected to the compressor.

[0020] There is a height difference and a circumferential spacing between the horizontal connecting pipe and the end of the horizontal pipe of the partition communicating vessel, which enables the gas to flow in the lower chamber and then enter the T-shaped connecting pipe, achieving the effects of further noise reduction and gas-liquid separation; the T-shaped structure of the new structure makes the reflux gas have to pass through the longer vertical connecting pipe before reaching the horizontal connection, so that the gas will be significantly affected by a greater resistance, and the horizontal pipelines on both sides increase the pressure in the lower chamber, making it more difficult to generate a reflux effect.

[0021] Furthermore, the first resonance cavity and the second resonance cavity are symmetrically arranged, and the total volume of the first resonance cavity and the second resonance cavity is not less than half of the volume in the lower chamber to ensure the effect of resonance noise reduction. Although the resonance cavities are symmetrically arranged, the partition communicating vessels arranged respectively do not necessarily need to be symmetrically arranged, but according to the characteristics of the gas, ventilation holes at different positions and air outlet ends at different heights are set; the first resonance cavity and the second resonance cavity are two independent Helmholtz resonance cavities, which are respectively used to eliminate noises in the range of 600 - 1000 Hz.

[0022] Two independent Helmholtz resonance cavities are arranged on the liquid storage device to eliminate two different frequencies of noises. At the same time, the noise elimination frequencies of the two Helmholtz resonance cavities are similar, so the noise elimination characteristics in the nearby frequency bands can be improved simultaneously, and thus the noises in the range of 600 - 1000 Hz can be effectively eliminated.

[0023] Furthermore, the central axes of the air inlet, the air outlet and the T-shaped connecting pipe are coaxially arranged and are set in the exact middle of the liquid storage device body. Such a setting makes the whole liquid storage device symmetrically structured, with better balance and stability, and it can be stably supported and fixed only by the connection of the pipelines below.

[0024] Furthermore, the volume of the upper chamber is smaller than the volume of the lower chamber. There is an upper end cover on the upper chamber, and the air inlet is arranged on the upper end cover. The setting of the upper end cover facilitates the manufacture and installation of the whole liquid storage device.

[0025] Furthermore, the flow path of the gas entering the liquid storage device is as follows: The gas is first separated from gas and liquid and expanded and silenced in the upper chamber, and then the gas flows from the two partition communicating vessels to the lower chamber respectively, and is resonantly silenced when passing through the first resonance cavity and the second resonance cavity. The gas entering the lower chamber is separated from gas and liquid for the second time and then enters the T-shaped connecting pipe to converge and is discharged from the air outlet. The gas is separated and silenced multiple times and at multiple levels under this path, and the gas discharged into the compressor has low noise and is dry.

[0026] Furthermore, an air-conditioning compressor with a liquid receiver for eliminating cavity modal noise, wherein a liquid receiver body is arranged outside the air-conditioning compressor, and the liquid receiver body is connected to the air-conditioning compressor through an intake elbow pipe; the liquid receiver body is concentrically arranged with the air-conditioning compressor, and the radian of the liquid receiver body is not less than 1 / 3 of the circumference. The liquid receiver arranged in this way has a simple structure, is convenient to install and has good stability.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through multiple gas-liquid separation technologies and various gas silencing technologies, this liquid receiver can eliminate most of the gas noise while completing gas-liquid separation, which not only improves the gas pulsation at the suction end, reduces the noise of the whole compressor, but also reduces the cavity resonance noise, avoids abnormal vibration between the liquid receiver and the whole machine, and the whole machine has better stability. There is no need to set a complex connection and fixing structure between the liquid receiver and the compressor body; 2. The setting of the partition plate and the resonance cavity combines expansion silencing and resonance silencing, achieving a better noise reduction effect; 3. Two independent Helmholtz resonance cavities are arranged on the liquid receiver to eliminate two different frequency noises. At the same time, the silencing frequencies of the two Helmholtz resonance cavities are similar, so the silencing characteristics in the nearby frequency band can be improved simultaneously, and thus the noise in the range of 600 - 1000 Hz can be effectively eliminated; 4. The T-shaped connecting pipe can not only play the role of gas-liquid separation, but also play the role of preventing backflow, without specially setting a suction backflow prevention structure in the liquid receiver so as not to affect the efficiency; 5. The connection structure between this air-conditioning compressor and the liquid receiver is simple, convenient to install, and has good stability and balance, and can be stably supported and fixed only by the connection of the lower elbow pipe. Description of the Drawings

[0028] Figure 1 is the connection and installation structure of the liquid receiver of the compressor in the prior art;

[0029] Figure 2 is the layout structure schematic diagram of a liquid receiver with a cavity modal noise elimination function according to the present invention;

[0030] Figure 3 is the top view schematic diagram of a liquid receiver with a cavity modal noise elimination function according to the present invention;

[0031] Figure 4 is the semi-sectional schematic diagram of a liquid receiver with a cavity modal noise elimination function according to the present invention;

[0032] Figure 5 is the cross-sectional schematic diagram of the upper chamber of a liquid receiver with a cavity modal noise elimination function according to the present invention;

[0033] Figure 6 is the cross-sectional schematic diagram of the lower chamber of a liquid receiver with a cavity modal noise elimination function according to the present invention;

[0034] Figure 7 Schematic diagram of the T-shaped connecting pipe structure of a liquid reservoir with cavity mode noise elimination according to the present invention;

[0035] Figure 8 Schematic diagram of the partition connector structure of a liquid reservoir with cavity mode noise elimination according to the present invention;

[0036] In the figure: 1, air conditioner compressor; 2, liquid reservoir; 3, liquid reservoir body; 301, upper chamber; 302, lower chamber; 303, upper end cover; 4, partition; 401, shallow groove; 5, air inlet; 6, air outlet; 7, first resonance cavity; 8, second resonance cavity; 9, partition connector; 901, vertical pipe part; 902, elbow pipe part; 903, horizontal pipe part; 10, oil leakage hole; 11, T-shaped connecting pipe; 1101, vertical connecting pipe; 1102, horizontal connecting pipe; 12, ventilation hole; 13, vertical plate; 14, air inlet elbow. Specific embodiments

[0037] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work conditions belong to the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1:

[0040] As Figures 2 to 8As shown in the figure, a liquid reservoir with cavity mode noise elimination includes an arc-shaped liquid reservoir body 3. An air inlet 5 is provided above the liquid reservoir body 3, and an air outlet 6 is provided below it. A partition 4 is arranged inside the liquid reservoir body 3. The partition 4 divides the inner cavity of the liquid reservoir body 3 into an upper chamber 301 and a lower chamber 302. A first resonance cavity 7 and a second resonance cavity 8 are respectively arranged on both sides of the lower chamber 302. A number of oil leakage holes 10 are provided on the partition 4, and the oil leakage holes 10 are arranged on the partition 4 between the first resonance cavity 7 and the second resonance cavity 8. Partition connectors 9 are respectively arranged on both sides of the partition 4. One end of the partition connector 9 is located in the upper chamber 301, and the other end is located in the lower chamber 302. The middle part of the partition connector 9 passes through the first resonance cavity 7 or the second resonance cavity 8 and is provided with a ventilation hole 12. A T-shaped connecting pipe 11 is also arranged in the lower chamber between the first resonance cavity 7 and the second resonance cavity 8, and the lower end of the T-shaped connecting pipe 11 is connected to the air outlet 6.

[0041] Through multiple gas-liquid separation technologies and various gas silencing technologies, this liquid reservoir can eliminate most gas noises while completing gas-liquid separation. It not only improves the gas pulsation at the suction end, reduces the noise of the whole compressor, but also reduces the cavity resonance noise, avoids abnormal vibration between the liquid reservoir and the whole machine, has better stability of the whole machine, and does not need to set up a complex connection and fixing structure between the liquid reservoir and the compressor body.

[0042] After the partition 4 divides the inner cavity of the liquid reservoir into upper and lower chambers, when the gas-liquid mixture enters the upper chamber 301, the gas will be expanded and silenced and then enter the partition connectors 9 on both sides. The partition 4 can play a role in primary gas-liquid separation, and the liquid will fall onto the partition 4. When the gas entering the partition connector 9 passes through the first resonance cavity 7 and the second resonance cavity 8, it will be resonantly silenced by the resonance cavity. After the resonantly silenced gas enters the lower chamber 302, it will complete secondary gas-liquid separation under the action of the T-shaped connecting pipe 11, so that the gas discharged from the lower air outlet does not contain liquid and has less gas noise, ensuring that the gas sucked by the compressor is in a gaseous state.

[0043] The arrangement of the partition 4 and the resonance cavity combines expansion silencing and resonance silencing, achieving a good noise reduction effect. The arrangement of the two resonance cavities can eliminate noises of different frequencies, and can also synergistically improve the silencing characteristics to eliminate noises of specific frequencies.

[0044] The arrangement of the oil leakage holes 10 enables the separated liquid to fall and drain; the arrangement of the ventilation holes 12 enables gas to enter the resonance cavity and complete silencing after circulating in the resonance cavity; the T-shaped connecting pipe 11 can not only separate gas and liquid, but also prevent backflow, eliminating the need to specifically set up an air intake anti-backflow structure in the liquid storage device to avoid affecting efficiency.

[0045] Further, the upper plane of the partition plate 4 is provided with a concave shallow groove 401, and a pair of vertical plates 13 are arranged between the lower part of the partition plate 4 and the lower chamber 302. A first resonance cavity 7 or a second resonance cavity 8 is formed between the vertical plates 13 and the lower chamber 302.

[0046] The arrangement of the shallow groove 401 on the partition plate 4 facilitates the collection and convergence of liquid; the arrangement of the vertical plates 13 can support the partition plate 4 while forming the first resonance cavity 7 and the second resonance cavity 8, enabling it to form an integral stable structure.

[0047] Further, the oil leakage holes 10 are arranged in several radially arranged rows, with 4 oil leakage holes 10 in each row. Since the liquid storage device body 3 has an arc-shaped structure, such an arrangement of the oil leakage holes can better adapt to the arc-shaped liquid storage device structure.

[0048] Further, the partition plate connector 9 includes an integrated vertical pipe portion 901, a bent pipe portion 902, and a horizontal pipe portion 903. The vertical pipe portion 901 passes through the partition plate 4 and communicates with the upper chamber 301, and the horizontal pipe portion 903 passes through the vertical plate 13 and communicates with the middle of the lower chamber 302; the ventilation hole 12 is arranged on the vertical pipe portion 901 or the bent pipe portion 902.

[0049] With the partition plate connector 9 of this structure, on the one hand, gas can smoothly enter the lower chamber 302 from the upper chamber and undergo silencing through the resonance cavity, and on the other hand, it also extends the path of the gas, allowing the gas to be buffered and silenced, achieving a better noise reduction effect; the arrangement of the partition plate connector 9 enables the gas to pass through three chambers.

[0050] Further, the T-shaped connecting pipe 11 includes a horizontal connecting pipe 1102 and a vertical connecting pipe 1101. The two ends of the horizontal connecting pipe 1102 face the first resonance cavity 7 and the second resonance cavity 8 respectively. The height of the horizontal connecting pipe 1102 is higher than the port where the partition plate connector 9 communicates with the lower chamber 302. The vertical connecting pipe 1101 is not shorter than half of the lower chamber 302, and the vertical connecting pipe 1101 passes through the air outlet 6 and is connected to the compressor.

[0051] There is a height difference and a circumferential spacing between the horizontal connecting pipe 1102 and the end of the horizontal pipe of the partition connector 9, which enables the gas to flow in the lower chamber and then enter the T-shaped connecting pipe 11, achieving the effect of further noise reduction and gas-liquid separation. The T-shaped structure of the new structure makes the reflux gas have to pass through a longer vertical connecting pipe before reaching the horizontal connection, so that the gas will be significantly affected by a greater resistance, and the horizontal pipelines on both sides increase the pressure in the lower chamber, making it more difficult to generate a reflux effect.

[0052] Furthermore, the first resonance cavity 7 and the second resonance cavity 8 are symmetrically arranged, and the total volume of the first resonance cavity 7 and the second resonance cavity 8 is not less than half of the volume in the lower chamber 302 to ensure the effect of resonance noise reduction. Although the resonance cavities are symmetrically arranged, the partition connectors provided for each of them do not necessarily need to be symmetrically arranged. Instead, according to the characteristics of the gas, vent holes at different positions and air outlet ends at different heights are provided. The first resonance cavity 7 and the second resonance cavity 8 are two independent Helmholtz resonance cavities, which are respectively used to eliminate noises in the range of 600 - 1000 Hz.

[0053] Two independent Helmholtz resonance cavities are provided on the liquid storage device to eliminate noises of two different frequencies. At the same time, the noise elimination frequencies of the two Helmholtz resonance cavities are similar. Therefore, the noise elimination characteristics in the nearby frequency bands can be improved simultaneously, and thus noises in the range of 600 - 1000 Hz can be effectively eliminated.

[0054] Furthermore, the central axes of the air inlet 5, the air outlet 6, and the T-shaped connecting pipe 11 are coaxially arranged and are set in the exact middle of the liquid storage device body 3. Such an arrangement makes the entire liquid storage device symmetrically structured, with better balance and stability, and it can be stably supported and fixed only by the connection of the pipelines below.

[0055] Furthermore, the volume of the upper chamber 301 is smaller than the volume of the lower chamber 302. An upper end cover 303 is provided on the upper chamber 301, and the air inlet 5 is provided on the upper end cover 303. The provision of the upper end cover 303 facilitates the manufacture and installation of the entire liquid storage device.

[0056] Furthermore, the flow path of the gas entering the liquid storage device is as follows: The gas is first separated from gas and liquid and expanded and noise-reduced in the upper chamber 301. Subsequently, the gas flows from the two partition connectors 9 to the lower chamber 302 respectively, and is resonance noise-reduced when passing through the first resonance cavity 7 and the second resonance cavity 8. The gas entering the lower chamber 302 is separated from gas and liquid for the second time and then enters the T-shaped connecting pipe 11, converges, and is discharged from the air outlet 6. The gas is separated and noise-reduced multiple times and at multiple levels in this path, and the gas discharged into the compressor has low noise and is dry.

[0057] Embodiment 2:

[0058] An air-conditioning compressor with cavity mode noise elimination uses the liquid receiver in the first embodiment. The liquid receiver body 3 is arranged outside the air-conditioning compressor 1, and the liquid receiver body 3 is connected to the air-conditioning compressor 1 through an intake elbow 14; the liquid receiver body 3 and the air-conditioning compressor 1 are concentrically arranged, and the radian of the liquid receiver body 3 is not less than 1 / 3 of the circumference. The liquid receiver arranged in this way has a simple structure, is convenient to install and has good stability.

[0059] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid reservoir with cavity mode noise elimination, characterized in that, It includes an arc-shaped liquid storage body. An air inlet is provided above the liquid storage body, and an air outlet is provided below it. A partition is provided inside the liquid storage body. The partition divides the inner cavity of the liquid storage body into an upper chamber and a lower chamber. A first resonance cavity and a second resonance cavity are respectively provided on both sides of the lower chamber. A number of oil leakage holes are provided on the partition, and the oil leakage holes are provided on the partition between the first resonance cavity and the second resonance cavity; partition connectors are respectively provided on both sides of the partition. There are two partition connectors. One end of the partition connector is located in the upper chamber, and the other end is located in the lower chamber. The middle part of the partition connector passes through the first resonance cavity or the second resonance cavity and is provided with a ventilation hole; a T-shaped connecting pipe is further provided in the lower chamber between the first resonance cavity and the second resonance cavity. The lower end of the T-shaped connecting pipe is connected to the air outlet; the partition connector includes an integrated vertical pipe part, a bent pipe part and a horizontal pipe part. The vertical pipe part passes through the partition and communicates with the upper chamber. The horizontal pipe part passes through the first resonance cavity or the second resonance cavity and communicates with the lower chamber; the ventilation hole is provided in the vertical pipe part or the bent pipe part; the first resonance cavity and the second resonance cavity are symmetrically arranged, and the total volume of the first resonance cavity and the second resonance cavity is not less than half of the volume in the lower chamber; the first resonance cavity and the second resonance cavity are two independent Helmholtz resonance cavities, which are respectively used to eliminate noise in the range of 600 - 1000 Hz.

2. The liquid storage device with cavity mode noise elimination according to claim 1, wherein A concave shallow groove is provided on the upper plane of the partition. A pair of vertical plates are provided between the lower part of the partition and the lower chamber. The first resonance cavity or the second resonance cavity is formed between the vertical plate and the lower chamber.

3. The liquid storage device with cavity mode noise elimination according to claim 1, characterized in that, The oil leakage holes are arranged in several radial rows, and 3 - 6 oil leakage holes are arranged in each row.

4. The liquid storage device with cavity mode noise elimination according to claim 1, wherein The T-shaped connecting pipe includes a horizontal connecting pipe and a vertical connecting pipe. The two ends of the horizontal connecting pipe respectively face the first resonance cavity and the second resonance cavity. The height of the horizontal connecting pipe is higher than the port where the partition connector communicates with the lower chamber. The vertical connecting pipe is not shorter than half of the lower chamber, and the vertical connecting pipe passes through the air outlet and is connected to the compressor.

5. The liquid reservoir with cavity mode noise elimination according to claim 1, characterized in that, The central axes of the air inlet, the air outlet and the T-shaped connecting pipe are coaxially arranged and are provided at the exact center of the liquid storage body.

6. The liquid reservoir with cavity mode noise elimination according to claim 1, characterized in that, The volume of the upper chamber is smaller than that of the lower chamber. An upper end cover is provided on the upper chamber, and the air inlet is provided on the upper end cover.

7. The liquid storage device with cavity mode noise elimination according to claim 1, characterized in that, The flow path of the gas entering the liquid storage is as follows: The gas is first gas-liquid separated and expanded and silenced in the upper chamber. Subsequently, the gas flows from the two partition connectors to the lower chamber respectively, and is resonance-silenced when passing through the first resonance cavity and the second resonance cavity. The gas entering the lower chamber is secondarily gas-liquid separated and then enters the T-shaped connecting pipe to converge and is discharged from the air outlet.

8. The air-conditioning compressor with a liquid reservoir for eliminating cavity modal noise according to any one of claims 1 to 7, characterized in that The accumulator body is arranged outside the air-conditioning compressor, and the accumulator body is connected to the air-conditioning compressor through an intake elbow pipe; the accumulator body and the air-conditioning compressor are concentrically arranged, and the radian of the accumulator body is not less than 1 / 3 of the circumference.

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