A liquid receiver and a compressor

Abstract

The present invention provides a liquid reservoir and a compressor, wherein the liquid reservoir comprises an air inlet, a filter bracket, an air outlet and a muffler, wherein the filter bracket is arranged between the air inlet and the air outlet, the muffler is connected to the filter bracket, and the muffler comprises a muffler chamber and a perforated tube, wherein the muffler chamber is arranged at one end of the filter bracket facing the air inlet, one end of the perforated tube is connected to the muffler chamber, and the other end passes through the filter bracket toward the air outlet. On the one hand, the noise passing through the liquid reservoir can be reduced by the Helmholtz resonance sound absorption principle, and on the other hand, by reasonably arranging the position of the muffler, the processing cost is reduced and the noise reduction effect is further optimized, thereby solving the problem of unsatisfactory noise reduction effect of the existing liquid reservoir.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a liquid accumulator and a compressor. Background Art

[0002] Part of the noise during the operation of the air conditioner comes from the transmission sound in the indoor unit, and a lot of the transmission sound is transmitted to the indoor unit through the liquid reservoir. In the prior art, the liquid reservoir is not designed to suppress the transmission sound, resulting in unsatisfactory noise reduction effect of the entire system pipeline, thus affecting the user experience.

[0003] In summary, the existing liquid storage device has the problem of unsatisfactory noise reduction effect. Summary of the invention

[0004] The object of the present invention is to provide a liquid reservoir and a compressor to solve the problem that the noise reduction effect of the liquid reservoir is not ideal.

[0005] In order to solve the above technical problems, the present invention provides a liquid reservoir, comprising an air inlet, a filter bracket, an air outlet and a muffler, wherein the filter bracket is arranged between the air inlet and the air outlet, the muffler is connected to the filter bracket, the muffler comprises a muffler chamber and a perforated tube, the muffler chamber is arranged at one end of the filter bracket facing the air inlet, one end of the perforated tube is connected to the muffler chamber, and the other end passes through the filter bracket toward the air outlet.

[0006] Optionally, the orifice tube has a predetermined length along the axial direction of the fluid reservoir.

[0007] Optionally, the silencer complies with the following formula:

[0008]

[0009] Among them, f is the vertical first-order cavity modal frequency of the liquid reservoir, c is the sound velocity in the gas medium inside the liquid reservoir, S is the cross-sectional area of ​​the orifice tube, l is the predetermined length, d is the equivalent inner diameter of the orifice tube, and V is the volume of the silencer cavity.

[0010] Optionally, the axes of the orifice tube, the air inlet and the air outlet coincide with each other.

[0011] Optionally, the silencer includes silencer cotton arranged in the silencer cavity.

[0012] Optionally, the sound-absorbing cotton fills at least 80% of the volume of the sound-absorbing cavity.

[0013] Optionally, the shell of the silencer chamber includes a first end surface and a curved surface, the orifice tube is opened on the first end surface, the first end surface is connected to the filter bracket, and the curved surface protrudes toward the air inlet.

[0014] Optionally, the filter support includes a substrate and more than two filter holes, and the more than two filter holes are opened on the substrate around the axis of the liquid reservoir and are located outside the projection of the first end surface on the substrate.

[0015] Optionally, the liquid reservoir further comprises a filter screen, which covers the filter support and a side of the muffler close to the air inlet and covers all the filter holes.

[0016] In order to solve the above technical problem, the present invention also provides a compressor, comprising the above liquid storage device.

[0017] Compared with the prior art, in the liquid reservoir and compressor provided by the present invention, the liquid reservoir includes an air inlet, a filter bracket, an air outlet and a muffler, the filter bracket is arranged between the air inlet and the air outlet, the muffler is connected to the filter bracket, the muffler includes a muffler chamber and a perforated tube, the muffler chamber is arranged at one end of the filter bracket facing the air inlet, one end of the perforated tube is connected to the muffler chamber, and the other end passes through the filter bracket toward the air outlet. On the one hand, the noise passing through the liquid reservoir can be reduced by the Helmholtz resonance sound absorption principle, and on the other hand, by reasonably arranging the position of the muffler, the processing cost is reduced and the noise reduction effect is further optimized, solving the problem of unsatisfactory noise reduction effect of the existing liquid reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0019] Figure 1 is a cross-sectional view of a liquid reservoir according to an embodiment of the present invention;

[0020] Figure 2 is a front view of a filter support and a muffler according to an embodiment of the present invention;

[0021] Figure 3 is a cross-sectional view of a filter support and a muffler according to an embodiment of the present invention;

[0022] Figure 4 is a top view of a filter support and a muffler according to an embodiment of the present invention;

[0023] Figure 5 is a bottom view of a filter support and a muffler according to an embodiment of the present invention;

[0024] Figure 6 It is a frequency-noise simulation calculation data diagram of a compressor provided by an embodiment of the present invention.

[0025] In the attached figure:

[0026] 1-air inlet; 2-muffler; 3-filter bracket; 4-air outlet; 5-filter screen;

[0027] 21 - silencer cavity; 22 - hole tube; 23 - arc surface; 24 - first end surface; 31 - substrate; 32 - filter hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0029] As used in the present invention, the singular forms "one", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in the present invention, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless otherwise clearly indicated in the content. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The core idea of ​​the present invention is to provide a liquid reservoir and a compressor to solve the problem that the noise reduction effect of the liquid reservoir is not ideal.

[0031] The following description is given with reference to the accompanying drawings.

[0032] Please refer to Figures 1 to 5 ,in, Figure 1 is a cross-sectional view of a liquid reservoir according to an embodiment of the present invention; Figure 2 is a front view of a filter support and a muffler according to an embodiment of the present invention; Figure 3 is a cross-sectional view of a filter support and a muffler according to an embodiment of the present invention; Figure 4 is a top view of a filter support and a muffler according to an embodiment of the present invention; Figure 5 It is a bottom view of a filter support and a muffler according to an embodiment of the present invention.

[0033] Figure 1 A liquid storage device is shown, comprising an air inlet 1, a filter support 3, an air outlet 4 and a muffler 2, wherein the filter support 3 is arranged between the air inlet 1 and the air outlet 4, and the muffler 2 is connected to the filter support 3, please refer to Figure 3 The silencer 2 includes a silencer chamber 21 and a perforated tube 22. The silencer chamber 21 is arranged at one end of the filter bracket 3 facing the air inlet 1. One end of the perforated tube 22 is connected to the silencer chamber 21, and the other end passes through the filter bracket 3 toward the air outlet 4.

[0034] In order to effectively reduce noise, the following issues need to be considered: First, there are many possible optional silencer structures. How to choose a relatively more effective silencer structure? Second, the silencer structure is arranged at different positions in the reservoir, and the final noise reduction effect that can be achieved is different. How to determine the layout position of the silencer? Third, while considering the first two issues, the improvement cost should also be considered. How to make the improvement plan have less impact on the size of other parts of the reservoir and less impact on the processing flow of the reservoir. In order to solve the above problems, the inventors first studied the generation mechanism and specific distribution of the reservoir noise, and found that the main source of the reservoir noise is the transmitted sound, not the noise generated by its own work. In view of the noise characteristics and taking into account the improvement cost, the inventors chose the silencer 2 structure that uses the Helmholtz resonance sound absorption principle; then, the inventors conducted multiple simulations and experiments on the specific setting position of the silencer 2, and found that when the orifice tube 22 of the silencer 2 is between the air inlet 1 and the air outlet 4 and facing the air outlet 4, it has a better silencing effect; finally, the inventors chose a solution to modify the filter bracket 3 of the reservoir. Compared with the potential manufacture of a complete silencer and the setting in the reservoir, such a solution has little change to the overall reservoir and has little impact on the processing flow of the reservoir. It should be understood that this solution is compared with the following three potential solutions: 1) using other silencing structures, such as spoiler structures; 2) setting the silencer 2 on the outer wall of the reservoir, and passing the orifice tube 22 through the outer wall toward the inside of the reservoir; 3) processing a silencer 2 independent of the filter bracket 3 and arranging it reasonably; each solution may rank differently under different independent evaluation indicators, but considering the three problems mentioned above, this solution has better comprehensive effects than the above three potential solutions. Compared with other possible potential solutions, this solution also has better comprehensive effects.

[0035] Preferably, the orifice tube 22 has a predetermined length along the axial direction of the reservoir. According to the Helmholtz resonance sound absorption principle, the orifice tube 22 needs to have a certain axial length, and cannot be just an opening on the muffler chamber 21. Those skilled in the art can select a suitable predetermined length through a prototype machine and several experiments according to the shape, size and vibration frequency of the reservoir, so that the reservoir can better reduce noise.

[0036] In a preferred embodiment, the muffler 2 complies with the following formula:

[0037]

[0038] Wherein, f is the vertical 1st-order cavity modal frequency of the reservoir, c is the speed of sound in the gas medium inside the reservoir, S is the cross-sectional area of ​​the orifice tube 22, l is the predetermined length, d is the equivalent inner diameter of the orifice tube 22, and V is the volume of the muffler cavity 21. It should be understood that although the "=" symbol is used in the formula, it should be broadly understood that any size that can control the relative values ​​of the left and right sides of the formula within an error of ±5% should be regarded as the scope of the right protection. The above-mentioned equivalent inner diameter should be understood as follows: when the cross-section of the orifice tube 22 is circular, the diameter of the circle is the equivalent inner diameter; when the cross-section of the orifice tube 22 is not circular, the diameter of the circle with the same area as the cross-section is the equivalent inner diameter. For a Helmholtz resonance cavity, when the air inside it is forcibly compressed by external fluctuations, the air in the pipe will vibrate, and the air in the cavity will generate a restoring force on it. In other words, the air in the resonance cavity is an "air spring". When the wavelength of the sound wave is much larger than the geometric size of the resonator, it can be considered that the kinetic energy of the air vibration in the resonator is concentrated on the movement of the air in the pipe, and the potential energy is only related to the elastic deformation of the air in the cavity. In this way, the resonator is a one-dimensional vibration system composed of the effective mass of the air in the pipe and the elasticity of the air in the cavity, so it resonates with the applied wave, and its natural frequency is:

[0039]

[0040] When the size of the silencer 2 is changed so that the value is consistent with the vertical 1st-order cavity modal frequency of the liquid reservoir, a better noise reduction effect can be obtained. The inventor's experiments have proved that under this condition, the transmission loss of the low frequency band and the transmission loss of the high frequency band can be improved at the same time, thereby reducing the transmission sound.

[0041] In a preferred embodiment, the axes of the orifice tube 22, the air inlet 1 and the air outlet 4 coincide with each other. According to the above analysis, the principle of the muffler 2 is to reduce noise by converting the kinetic energy of the air into potential energy. When the axes of the orifice tube 22, the air inlet 1 and the air outlet 4 coincide with each other, the orifice tube 22 can absorb more kinetic energy of the air, thus achieving a better noise reduction effect.

[0042] Preferably, the silencer includes silencer cotton disposed in the silencer cavity, and preferably, the silencer cotton fills at least 80% of the volume of the silencer cavity. This configuration further reduces air kinetic energy and increases noise reduction effect.

[0043] Please refer to Figure 2 and Figure 3In a preferred embodiment, the shell of the muffler chamber 21 includes a first end surface 24 and a curved surface 23, the orifice tube 22 is provided on the first end surface 24, the first end surface 24 is connected to the filter support 3, and the curved surface 23 protrudes toward the air inlet. The setting of the first end surface 24 can utilize the existing structure of the filter support 3 to further reduce the extent of modification of the filter support 3; the setting of the curved surface 23 can buffer the airflow of the air inlet 1, reduce the new noise caused by the additional setting of the muffler 2, and the curved surface 23 is also a relatively easy-to-process structure, reducing the processing cost.

[0044] Please refer to Figure 3 , Figure 4 and Figure 5 In one embodiment, the filter support 3 includes a substrate 31 and two or more filter holes 32, and the two or more filter holes 32 are opened on the substrate 31 around the axis of the liquid reservoir and are located outside the projection of the first end surface 24 on the substrate 31. In this configuration, the filter structure of the filter support 3 is adaptively modified, and the filtering function of the filter support 3 is retained. The specific number, positioning size and structural details of the filter holes 32 can be understood and set by those skilled in the art according to the prior art, and will not be described in detail here. In some embodiments, the substrate 31 can be used as the first end surface 24 of the muffler cavity 21, and in practice, a hemispherical cover is welded to the substrate 31 to form the muffler cavity 21. Of course, in some other embodiments, an independent muffler shell structure can also be set, that is, a bottom plate is used as the first end surface 24, which is connected to the hemispherical cover to form the muffler cavity 21, and then the complete muffler shell structure is connected to the substrate 31.

[0045] Please refer to Figure 1 In one embodiment, the liquid reservoir further includes a filter screen 5, which covers the filter support 3 and the muffler 2 on one side close to the air inlet, and covers all the filter holes 32. The filter screen 5 can prevent foreign matter from entering the liquid reservoir, and separate the oil and gas from the mixed gas entering the air inlet to achieve a filtering function. The material, connection method and structural details of the filter screen 5 can be understood and set by those skilled in the art based on the prior art, and will not be described in detail here.

[0046] This embodiment also provides a compressor, including the above-mentioned liquid reservoir. Since the above-mentioned liquid reservoir has a good noise reduction effect, the compressor also has a good noise reduction effect. Those skilled in the art can set other components and structures of the compressor according to the actual existing technology, which will not be described in detail here.

[0047] Please refer to Figure 6 , Figure 6It is a frequency-noise simulation calculation data graph of the compressor provided by an embodiment of the present invention, in which the solid line L1 represents the frequency-noise data curve of the liquid reservoir without the silencer 2, the dotted line L2 represents the data curve when the liquid reservoir is provided with the silencer 2, wherein the length of the hole tube 22 is 1.5 mm, and the dot-dash line L3 represents the data curve when the liquid reservoir is provided with the silencer 2, wherein the length of the hole tube 22 is 0.5 mm; the horizontal axis in the figure is the frequency of the transmitted sound, in Hz; the vertical axis is the loss of the transmitted sound, in dB. From the perspective of noise reduction, the greater the loss, the better the noise reduction effect.

[0048] In one example, a compressor has a transmission noise problem at 560 Hz. By substituting f=560 and other parameters into the following formula (please refer to the above description for the meaning of the parameters in the formula):

[0049]

[0050] It can be solved that the size of the muffler 2 can be selected as d = 0.5 ~ 2mm, l = 1.5mm. The specific dimensions of this embodiment are simulated to obtain Figure 6 As shown by the dotted line L2, the results show that when the silencer 2 adopts the above design, the silencing volume at 560 Hz can be increased by about 20 dB.

[0051] Please refer to Figure 6 As well as the dot-dash line L3, in another embodiment, the silencer 2 with d=0.5-2mm, l=0.5mm is selected to significantly improve the silencer volume in the frequency domain of 1160-1210Hz.

[0052] According to theoretical analysis and the above simulation data verification, when the muffler meets the following formula, it has a better muffler effect:

[0053]

[0054] The following conclusions are drawn: d is recommended to be 0.5-2mm. When d is fixed, as l increases, the frequency of the peak transmission loss moves toward low frequency. According to actual needs, the peak transmission loss frequency can be adjusted to the required position. Generally, low-frequency transmission sound is difficult to handle. When l is 0.5-5mm, the effect on low frequency is more significant, so l=0.5-5mm is recommended.

[0055] In summary, in the liquid reservoir and compressor provided by the present invention, the liquid reservoir includes an air inlet, a filter bracket, an air outlet and a muffler, the filter bracket is arranged between the air inlet and the air outlet, the muffler is connected to the filter bracket, the muffler includes a muffler chamber and a perforated tube, the muffler chamber is arranged at one end of the filter bracket facing the air inlet, one end of the perforated tube is connected to the muffler chamber, and the other end passes through the filter bracket toward the air outlet. On the one hand, the noise passing through the liquid reservoir can be reduced by the Helmholtz resonance sound absorption principle, and on the other hand, by reasonably arranging the position of the muffler, the processing cost is reduced and the noise reduction effect is further optimized, solving the problem of unsatisfactory noise reduction effect of the existing liquid reservoir.

[0056] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A liquid storage device, characterized in that: It includes an air inlet, a filter bracket, an air outlet and a muffler, wherein the filter bracket is arranged between the air inlet and the air outlet, the muffler is connected to the filter bracket, and the muffler includes a muffler chamber and a perforated tube, wherein the muffler chamber is arranged at one end of the filter bracket facing the air inlet, one end of the perforated tube is connected to the muffler chamber, and the other end passes through the filter bracket toward the air outlet; The axes of the orifice tube, the air inlet and the air outlet coincide with each other; The shell of the muffler chamber includes a first end surface and a curved surface. The orifice tube is opened on the first end surface. The first end surface is connected to the filter bracket. The curved surface protrudes toward the air inlet.

2. The liquid storage device according to claim 1, characterized in that: The orifice tube has a predetermined length in an axial direction of the reservoir.

3. The liquid reservoir according to claim 2, characterized in that The muffler complies with the following formula: Among them, f is the vertical first-order cavity modal frequency of the liquid reservoir, c is the sound velocity in the gas medium inside the liquid reservoir, S is the cross-sectional area of ​​the orifice tube, l is the predetermined length, d is the equivalent inner diameter of the orifice tube, and V is the volume of the silencer cavity.

4. The liquid reservoir according to claim 1, characterized in that The silencer includes silencer cotton arranged in the silencer cavity.

5. The liquid reservoir according to claim 4, characterized in that The sound-absorbing cotton fills at least 80% of the volume of the sound-absorbing cavity.

6. The liquid reservoir according to claim 1, characterized in that The filter support comprises a base plate and more than two filter holes. The more than two filter holes are opened on the base plate around the axis of the liquid reservoir and are located outside the projection of the first end surface on the base plate.

7. The liquid reservoir according to claim 6, characterized in that The liquid storage device further comprises a filter screen, which covers the filter support and a side of the muffler close to the air inlet and covers all the filter holes.

8. A compressor, characterized in that: Comprising the liquid reservoir according to any one of claims 1 to 7.

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