CN114111132A

CN114111132A - Liquid storage device and compressor

Info

Publication number: CN114111132A
Application number: CN202010888647.8A
Authority: CN
Inventors: 王海军; 于华生
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-03-01

Abstract

The invention provides a liquid storage device and a compressor, wherein the liquid storage device comprises an air inlet, a filtering support, an air outlet and a silencer, the filtering support is arranged between the air inlet and the air outlet, the silencer is connected with the filtering support, the silencer comprises a silencing cavity and a hole pipe, the silencing cavity is arranged at one end, facing the air inlet, of the filtering support, one end of the hole pipe is communicated with the silencing cavity, and the other end of the hole pipe penetrates through the filtering support, facing the air outlet. On the one hand, the noise passing through the liquid storage device can be reduced through the Helmholtz resonance sound absorption principle, on the other hand, the noise reduction effect is further optimized through the position of the reasonably arranged silencer, the processing cost is reduced, and the problem that the noise reduction effect of the existing liquid storage device is not ideal is solved.

Description

Liquid storage device and compressor

Technical Field

The invention relates to the field of compressors, in particular to a liquid storage device and a compressor.

Background

Noise generated during the operation of the air conditioner is partially transmitted from the indoor unit, and a lot of transmitted sound is transmitted to the indoor unit through the liquid storage device. In the prior art, the reservoir is not considered to suppress the transmitted sound during design, so that the noise reduction effect of the whole system pipeline is not ideal, and the user experience is influenced.

In conclusion, the existing liquid storage device has the problem of unsatisfactory noise reduction effect.

Disclosure of Invention

The invention aims to provide a liquid storage device and a compressor, and aims to solve the problem that the noise reduction effect of the liquid storage device is not ideal.

In order to solve the technical problem, the invention provides a liquid storage device which comprises a gas inlet, a filtering support, a gas outlet and a silencer, wherein the filtering support is arranged between the gas inlet and the gas outlet, the silencer is connected with the filtering support, the silencer comprises a silencing cavity and a hole pipe, the silencing cavity is arranged at one end, facing the gas inlet, of the filtering support, one end of the hole pipe is communicated with the silencing cavity, and the other end of the hole pipe penetrates through the filtering support, facing the gas outlet.

Optionally, the orifice tube has a predetermined length in an axial direction of the reservoir.

Optionally, the muffler conforms to the following formula:

wherein f is a mode frequency of a vertical 1-order cavity of the liquid reservoir, c is a sound velocity in a gas medium inside the liquid reservoir, S is a cross-sectional area of the hole tube, l is the predetermined length, d is an equivalent inner diameter of the hole tube, and V is a volume of the sound attenuation chamber.

Optionally, the axes of the hole pipe, the air inlet and the air outlet coincide.

Optionally, the muffler includes a sound-deadening cotton disposed in the sound-deadening chamber.

Optionally, the sound-damping cotton fills at least 80% of the volume of the sound-damping chamber.

Optionally, the casing in amortization chamber includes first terminal surface and cambered surface, the perforated pipe set up in on the first terminal surface, first terminal surface with filter the support connection, the cambered surface orientation the air inlet protrusion.

Optionally, the filter holder includes a base plate and more than two filter holes, and the more than two filter holes are opened on the base plate around an axis of the reservoir and are located outside a projection of the first end surface on the base plate.

Optionally, the liquid storage device further comprises a filter screen, and the filter screen covers the filter support and one side of the silencer close to the air inlet and covers all the filter holes.

In order to solve the technical problem, the invention further provides a compressor comprising the liquid storage device.

Compared with the prior art, in the liquid storage device and the compressor provided by the invention, the liquid storage device comprises an air inlet, a filtering support, an air outlet and a silencer, the filtering support is arranged between the air inlet and the air outlet, the silencer is connected with the filtering support, the silencer comprises a silencing cavity and a hole pipe, the silencing cavity is arranged at one end, facing the air inlet, of the filtering support, one end of the hole pipe is communicated with the silencing cavity, and the other end of the hole pipe penetrates through the filtering support, facing the air outlet. On the one hand, the noise passing through the liquid storage device can be reduced through the Helmholtz resonance sound absorption principle, on the other hand, the noise reduction effect is further optimized through the position of the reasonably arranged silencer, the processing cost is reduced, and the problem that the noise reduction effect of the existing liquid storage device is not ideal is solved.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:

FIG. 1 is a cross-sectional view of a reservoir of one embodiment of the present invention;

FIG. 2 is a front view of a filter support and muffler of an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a filter support and muffler of one embodiment of the present invention;

FIG. 4 is a top view of a filter support and muffler of an embodiment of the present invention;

FIG. 5 is a bottom view of a filter support and muffler of an embodiment of the present invention;

fig. 6 is a graph of frequency-noise simulation calculation data of a compressor according to an embodiment of the present invention.

In the drawings:

1-an air inlet; 2-a silencer; 3-a filtration scaffold; 4-air outlet; 5, filtering the filter screen;

21-a sound-deadening chamber; 22-bore tube; 23-cambered surface; 24-a first end face; 31-a substrate; 32-filtration pores.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a" and "an" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, 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 "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present invention, the disposition of an element with another element generally only means that there is a connection, coupling, fit or driving relationship between the two elements, and the connection, coupling, fit or driving relationship between the two elements may be direct or indirect through intermediate elements, and cannot be understood as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation inside, outside, above, below or to one side of another element, unless the content clearly indicates otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The core idea of the invention is to provide the liquid storage device and the compressor, so as to solve the problem that the noise reduction effect of the liquid storage device is not ideal.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 5, fig. 1 is a sectional view of a reservoir according to an embodiment of the present invention; FIG. 2 is a front view of a filter support and muffler of an embodiment of the present invention; FIG. 3 is a cross-sectional view of a filter support and muffler of one embodiment of the present invention; FIG. 4 is a top view of a filter support and muffler of an embodiment of the present invention; FIG. 5 is a bottom view of a filter support and muffler of an embodiment of the present invention.

Fig. 1 shows a liquid reservoir, including air inlet 1, filtering support 3, gas outlet 4 and muffler 2, filtering support 3 set up in the air inlet 1 with between the gas outlet 4, muffler 2 with filtering support 3 is connected, please refer to fig. 3, muffler 2 includes amortization chamber 21 and orifice pipe 22, amortization chamber 21 sets up in filtering support 3 towards the one end of air inlet 1, the one end of orifice pipe 22 with amortization chamber 21 intercommunication, the other end orientation gas outlet 4 passes filtering support 3.

In order to effectively reduce noise, the following problems need to be considered: first, there are many possibilities for alternative sound attenuating structures, how to select a relatively more efficient sound attenuating structure; secondly, the silencing structures are arranged at different positions of the liquid storage device, the final noise reduction effect which can be achieved is different, and how to determine the arrangement position of the silencer; thirdly, the improvement cost is also considered while the first two problems are considered, and how to realize the improvement scheme has small influence on the sizes of other parts of the liquid accumulator and the processing flow of the liquid accumulator. In order to solve the problems, the inventor firstly researches the generation mechanism and the specific distribution of the noise of the liquid accumulator, obtains that the main source of the noise of the liquid accumulator is transmission sound instead of self work, and aiming at the noise characteristic and comprehensively considering the improvement cost, the inventor selects the structure of the silencer 2 by utilizing the Helmholtz resonance sound absorption principle; then, the inventor conducts a plurality of simulations and experiments on the specific arrangement position of the silencer 2, and finds that when the hole pipe 22 of the silencer 2 is positioned between the air inlet 1 and the air outlet 4 and faces the air outlet 4, a better silencing effect is achieved; finally, the inventor has chosen a solution for modifying the filter holder 3 of the reservoir, which, compared with the potential of making a complete silencer and arranging it in the reservoir, has a small overall modification of the reservoir and a small impact on the process flow of the reservoir. It is to be understood that this scheme is compared to three potential schemes: 1) using other sound attenuating structures, such as a spoiler structure; 2) the silencer 2 is arranged on the outer wall of the liquid storage device, and the hole pipe 22 penetrates through the outer wall and faces the interior of the liquid storage device; 3) a silencer 2 independent of the filtering bracket 3 is processed and reasonably arranged; it is possible that each scheme has different names under different independent evaluation indexes, but the scheme has better comprehensive effect than the three potential schemes by comprehensively considering the three problems mentioned above. Compared with other potential schemes, the scheme also has better comprehensive effect.

Preferably, the orifice tube 22 has a predetermined length in the axial direction of the reservoir. As can be appreciated from the helmholtz resonance sound absorption principle, the bore tube 22 needs to have a certain axial length and cannot be merely an opening in the sound-deadening chamber 21. One skilled in the art can select a suitable predetermined length through several experiments by a prototype machine according to the shape, size and vibration frequency of the accumulator, so that the accumulator can reduce noise better.

In a preferred embodiment, the silencer 2 conforms to the following equation:

wherein f is a vertical 1-order cavity modal frequency of the liquid reservoir, c is a sound velocity in a gas medium inside the liquid reservoir, S is a cross-sectional area of the orifice tube 22, l is the predetermined length, d is an equivalent inner diameter of the orifice tube 22, and V is a volume of the sound-deadening chamber 21. It should be understood that although the formula uses the "═ symbol", it should be understood that any dimension that can control the relative value between the left and right sides of the formula within a tolerance of ± 5% should be considered as the scope of protection of the right. The above equivalent internal diameter should be understood as follows: when the cross section of the bore tube 22 is circular, the diameter of the circle is the equivalent inner diameter, and when the cross section of the bore tube 22 is not circular, the diameter of the circle having the same area as the cross section is the equivalent inner diameter. In a helmholtz resonator, when the air inside the resonator is compressed by external waves, the air inside the pipe moves vibrationally, and the air inside the resonator recovers the air, i.e., the air inside the resonator is an "air spring". Under the condition that the wave length of sound is far larger than the geometric dimension of the resonator, the kinetic energy of the air vibration in the resonator can be considered to be concentrated on the movement of the air in the pipeline, and the potential energy is only related to the elastic deformation of the air in the cavity. Thus, the resonator is a one-dimensional vibration system consisting of the effective mass of air in the pipeline and the elasticity of the air in the cavity, so that the resonator has a resonance phenomenon on the fluctuation of the applied action, and the natural frequency of the resonator is as follows:

when the size of the silencer 2 is changed to enable the value to be equal to the mode frequency of the vertical 1-step cavity of the liquid reservoir, a good noise reduction effect can be obtained, and experiments of an inventor prove that under the condition, low-frequency transmission loss and high-frequency transmission loss can be improved simultaneously, so that transmission sound is reduced.

In a preferred embodiment, the axes of the bore tube 22, the gas inlet 1 and the gas outlet 4 coincide. According to the foregoing analysis, the principle of the silencer 2 is to reduce noise by converting the kinetic energy of air into potential energy. When the axes of the perforated pipe 22, the air inlet 1 and the air outlet 4 coincide, the perforated pipe 22 can absorb more air kinetic energy, so that the noise reduction effect is better.

Preferably, the muffler comprises a sound-deadening cotton disposed within the sound-deadening chamber, and preferably, the sound-deadening cotton fills at least 80% of the volume of the sound-deadening chamber. So the configuration further subducts air kinetic energy, increases noise reduction effect.

Referring to fig. 2 and 3, in a preferred embodiment, the housing of the muffling chamber 2 includes a first end surface 24 and an arc surface 23, the hole tube 22 is opened on the first end surface 24, the first end surface 24 is connected to the filter support 3, and the arc surface 23 protrudes toward the air inlet. The arrangement of the first end face 24 can further reduce the transformation range of the filter support 3 by utilizing the existing structure of the filter support 3; the setting of cambered surface 23 can play the cushioning effect to the air current of air inlet 1, reduces because additionally set up the new noise that muffler 2 brought, and cambered surface 23 also is the structure of comparatively easy processing simultaneously, has reduced the processing cost.

Referring to fig. 3, 4 and 5, in an embodiment, the filter holder 3 includes a base plate 31 and more than two filter holes 32, and the more than two filter holes 32 are opened on the base plate 31 around an axis of the reservoir and are located outside a projection of the first end surface 24 on the base plate 31. With the configuration, the filtering structure of the filtering bracket 3 is modified adaptively, and the filtering function of the filtering bracket 3 is reserved. The specific number, positioning dimensions and construction details of the filter holes 32 are understood and arranged by those skilled in the art in view of the prior art and will not be described in detail herein. In some embodiments, the base plate 31 may be used as the first end surface 24 of the sound-deadening chamber 2, and a hemispherical cover is actually welded to the base plate 31 to form the sound-deadening chamber 2. In other embodiments, a separate muffler shell structure may be provided, that is, a bottom plate is used as the first end surface 24 to connect with the hemispherical cover to form the sound-deadening chamber 2, and the complete muffler shell structure is connected to the base plate 31.

Referring to fig. 1, in an embodiment, the liquid reservoir further includes a filter screen 5, and the filter screen 5 covers the filter bracket 3 and one side of the silencer 2 close to the air inlet, and covers all the filter holes 32. Set up filter screen 5 and can prevent that the foreign matter from getting into the reservoir to carry out oil-gas separation to the mist that the air inlet got into, realize filtering capability. The material, connection and construction details of the filter screen 5 can be understood and arranged by those skilled in the art according to the prior art, and will not be described in detail herein.

The embodiment also provides a compressor, which comprises the liquid storage device. Because the liquid accumulator has a good noise reduction effect, the compressor also has a good noise reduction effect. Other parts and structures of the compressor can be arranged by those skilled in the art according to the actual prior art and will not be described in detail here.

Referring to fig. 6, fig. 6 is a graph of frequency-noise simulation calculation data of a compressor according to an embodiment of the present invention, in which a solid line L1 represents a frequency-noise data curve of a liquid reservoir without a muffler 2, a dotted line L2 represents a data curve of a liquid reservoir with a muffler 2, in which a length of a hole tube 22 is 1.5mm, and a dotted line L3 represents a data curve of a liquid reservoir with a muffler 2, in which a length of a hole tube 22 is 0.5 mm; the abscissa in the figure is the frequency of the transmitted tone in Hz; the ordinate represents the loss of the transmitted sound in dB, and the larger the loss, the better the noise reduction effect.

In one example, a compressor has a transmission sound problem in 560Hz, 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):

the size of the silencer 2 can be selected from d 0.5-2mm and l 1.5 mm. The results shown by the broken line L2 in fig. 6 are obtained by simulating the specific dimensions of the present embodiment, and show that the sound deadening volume at 560Hz can be increased by about 20dB when the silencer 2 is designed as described above.

Referring to fig. 6 and the chain line L3, in another embodiment, the muffler 2 with d of 0.5-2mm and L of 0.5mm is selected, so as to significantly increase the muffling volume in the frequency domain of 1160-1210 Hz.

According to theoretical analysis and the verification of the simulation data, when the silencer conforms to the following formula, the silencer has a good silencing effect:

and the following conclusions are shown: d is preferably 0.5-2mm, and when d is fixed, the frequency of occurrence of the peak of the transmission loss shifts toward a low frequency with an increase in l. The transmission loss peak frequency may be adjusted to a desired position according to actual needs. Generally, low-frequency transmission sound is difficult to process, and the low-frequency effect is obvious when l is 0.5-5mm, so that l is recommended to be 0.5-5 mm.

In summary, in the liquid storage device and the compressor provided by the present invention, the liquid storage device includes an air inlet, a filtering support, an air outlet, and a silencer, the filtering support is disposed between the air inlet and the air outlet, the silencer is connected to the filtering support, the silencer includes a silencing chamber and a hole pipe, the silencing chamber is disposed at one end of the filtering support facing the air inlet, one end of the hole pipe is communicated with the silencing chamber, and the other end of the hole pipe penetrates through the filtering support facing the air outlet. On the one hand, the noise passing through the liquid storage device can be reduced through the Helmholtz resonance sound absorption principle, on the other hand, the noise reduction effect is further optimized through the position of the reasonably arranged silencer, the processing cost is reduced, and the problem that the noise reduction effect of the existing liquid storage device is not ideal is solved.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. The utility model provides a reservoir, its characterized in that, includes air inlet, filtering support, gas outlet and muffler, filtering support set up in the air inlet with between the gas outlet, the muffler with filtering the leg joint, the muffler includes amortization chamber and hole pipe, the amortization chamber sets up in filtering the support orientation the one end of air inlet, the one end of hole pipe with amortization chamber intercommunication, other end orientation the gas outlet is passed filtering the support.

2. The reservoir of claim 1, wherein the orifice tube has a predetermined length in an axial direction of the reservoir.

3. The reservoir of claim 2, wherein the muffler conforms to the formula:

4. The reservoir of claim 1, wherein the axes of the bore tube, the air inlet and the air outlet coincide.

5. The reservoir of claim 1, wherein the muffler includes a sound attenuating cotton disposed within the sound attenuating chamber.

6. The reservoir of claim 5, wherein the dampening cotton fills at least 80% of the volume of the dampening chamber.

7. The reservoir according to claim 1, characterized in that the housing of the silencing chamber comprises a first end face on which the duct opens and is connected to the filtering support, and an arc face projecting towards the air inlet.

8. The reservoir of claim 7, wherein the filter holder comprises a base plate and two or more filter pores opening in the base plate around the axis of the reservoir and located outside a projection of the first end face onto the base plate.

9. The reservoir of claim 8, further comprising a filter screen covering the filter support and the side of the muffler near the air inlet and covering all of the filter holes.

10. A compressor, characterized by comprising an accumulator according to any one of claims 1 to 9.