Muffler and compressor including the same

Abstract

The present invention provides a silencer and a compressor including the same, which relates to the technical field of compressors and solves the technical problem that noise reduction and low cooling loss of silencers in compressors cannot be taken into account at the same time. The silencer includes a silencer body arranged on a lower flange, and a closed chamber is provided in the silencer body near one end of the lower flange, and the closed chamber is filled with noise reduction liquid. The bottom and top of the closed chamber are provided with an isolation layer that allows gas to pass through but not through the liquid. After the high-pressure gas is subjected to primary noise reduction in the oil below the lower flange, it enters the silencer body and undergoes secondary noise reduction through the noise reduction liquid; the compressor includes a lower flange, a crankshaft and the above-mentioned silencer. The present invention utilizes viscous oil to eliminate noise, and because the gas discharged from the flange is in the silencer, the gurgling sound when the bubbles are discharged from the oil can be reduced, thereby achieving the purpose of double noise reduction; the closed chamber is filled with noise reduction liquid, and the oil volume inside the compressor will not be lost, and the performance of the compressor will not be affected.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a muffler and a compressor comprising the same. Background Art

[0002] It is difficult to reduce the noise of large variable frequency compressors at present. Various noise reduction schemes have been tested on the same model, but no obvious improvement has been achieved. Only the lower exhaust noise reduction scheme has a significant noise reduction under both R32 and R410 refrigerants. However, after exhausting by the lower exhaust method, the bottom oil directly enters the cavity formed by the lower flange and the lower muffler. Every time the flange baffle opens the gap for exhaust, the oil will also enter the cylinder, which reduces the actual cylinder compression space. The compressed high-pressure gas carries more oil and reduces the cooling capacity, which increases the cooling capacity loss of the lower exhaust noise reduction and seriously loses the performance of the compressor. Compared with the models with conventional noise reduction schemes, the cooling capacity of the compressor using the lower exhaust method for noise reduction is reduced by 3.5% at 30Hz / 60Hz and 5.7% at 90Hz. The COP is also greatly reduced. Because the high-temperature and high-pressure gas is directly discharged into the oil, there will be a gurgling sound caused by bubbles. Summary of the invention

[0003] The object of the present invention is to provide a silencer and a compressor comprising the same, so as to solve the technical problem in the prior art that the silencer in the compressor cannot achieve both noise reduction and low cooling loss.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A silencer provided by the present invention comprises a silencer body arranged on a lower flange, wherein the silencer body has a closed chamber near one end of the lower flange, the closed chamber is filled with noise reduction liquid, and the bottom and top of the closed chamber are provided with an isolation layer that allows gas to pass through but liquid cannot pass through. After the high-pressure gas is subjected to primary noise reduction in the oil below the lower flange, it enters the silencer body and undergoes secondary noise reduction through the noise reduction liquid.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] As a further improvement of the present invention, the noise reduction liquid filled in the closed chamber is made of the same material as the oil below the lower flange.

[0008] As a further improvement of the present invention, the sealed chamber is an annular structure, the peripheral side wall is connected to the inner wall of the muffler body, the bottom is arranged to fit the end face of the lower flange, the height of the sealed chamber is less than the height of the inner cavity of the muffler body, and the isolation layer covers the entire bottom and top area of ​​the sealed chamber. The top and bottom of the sealed chamber are open to form a sealed chamber through the isolation layer.

[0009] As a further improvement of the present invention, the muffler body is a double-layer muffler structure, including a muffler inner layer and a muffler outer layer, and the enclosed chamber is arranged in the muffler inner layer.

[0010] As a further improvement of the present invention, the closed chamber is an annular structure, the peripheral side wall and the top side wall are connected to the inner wall of the inner layer of the muffler, the bottom is arranged to fit the end face of the lower flange, and an air hole is provided on the top side wall of the closed chamber corresponding to the exhaust hole position on the inner layer of the muffler, and the isolation layer covers the entire bottom area of ​​the closed chamber and the air hole area. The closed chamber is an open-bottom structure, and the closed chamber is formed by the isolation layer. The height of the closed chamber is the same as the height of the inner layer of the muffler.

[0011] As a further improvement of the present invention, the isolation layer is made of a PTFE microporous membrane.

[0012] As a further improvement of the present invention, a dividing layer capable of cutting and dispersing bubbles is arranged outside the isolation layer.

[0013] As a further improvement of the present invention, the partition layer is made of a filter net.

[0014] As a further improvement of the present invention, the filter screen is made of a filter screen capable of bearing the weight of the noise reduction liquid in the closed chamber and the isolation layer.

[0015] The present invention provides a compressor, comprising a lower flange, a crankshaft and the muffler.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The silencer provided by the present invention has the same noise reduction principle as the traditional lower exhaust noise reduction, both of which adopt liquid noise reduction, and a closed chamber filled with viscous noise reduction liquid is arranged in the silencer body, and the viscous oil is used to eliminate noise, and because the closed chamber and the noise reduction liquid are located inside the silencer body, the bubbles coming out of the oil below the lower flange are subjected to noise reduction in the silencer, and because the gas exhausted from the flange is in the silencer, the gurgling sound when the bubbles come out of the oil can be reduced, thereby achieving the purpose of double noise reduction; the closed chamber is filled with noise reduction liquid, the amount of oil in the compressor will not be consumed, and the performance of the compressor will not be affected; in order to achieve the purpose of fixing the oil as the noise reduction liquid in the silencer A microporous membrane made of PTFE material is used in the closed chamber of the muffler body. This material can ensure that liquid molecules will not pass through, but can allow gas molecules to pass through, thereby fixing the oil in the muffler without losing oil, and allowing the gas to be discharged to achieve the purpose of noise reduction; the muffler of the present invention can reduce the difficulty of noise reduction of a large series of variable frequency compressors, and in the process of noise reduction, fully utilize the characteristics of refrigerant flow rate and different frequency and rotation speed to reasonably reduce noise; while keeping the pump body structure unchanged, the noise problem of large-displacement compressors is eliminated, making the noise reduction of the variable frequency machine easier, and also avoiding the characteristics of changing the pump body structure due to different refrigerants, reducing development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a cross-sectional view of the silencer of the present invention when it is a single-layer silencer structure;

[0020] Figure 2 yes Figure 1 A top view of

[0021] Figure 3 is a cross-sectional view of the silencer of the present invention when it is a double-layer silencer structure;

[0022] Figure 4 yes Figure 3 A top view of the inner layer of the middle silencer;

[0023] Figure 5 yes Figure 3 A cross-sectional view of the outer layer of the middle muffler;

[0024] Figure 6 yes Figure 5 Top view of the .

[0025] In the figure, 1, lower flange; 2, closed chamber; 3, isolation layer; 4, filter; 5, inner layer of muffler; 6, outer layer of muffler; 100, crankshaft; 200, exhaust hole. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0027] The present invention provides a silencer, comprising a silencer body arranged on a lower flange 1, wherein a closed chamber 2 is provided in the silencer body near one end of the lower flange 1, the closed chamber 2 is filled with noise reduction liquid, and an isolation layer 3 is provided at the bottom and top of the closed chamber 2 so that gas cannot pass through the liquid. After the high-pressure gas is subjected to primary noise reduction in the oil below the lower flange 1, it enters the silencer body and is subjected to secondary noise reduction by the noise reduction liquid.

[0028] The silencer provided by the present invention has the same noise reduction principle as the traditional lower exhaust noise reduction, both of which use liquid noise reduction. The difference is that the silencer of the present invention is provided with a closed chamber filled with viscous noise reduction liquid in the silencer body, and the viscous oil is used to eliminate noise. Because the closed chamber and the noise reduction liquid are located inside the silencer body, the bubbles coming out of the oil below the lower flange are subjected to noise reduction in the silencer. Because the gas discharged from the flange is in the silencer, the gurgling sound when the bubbles come out of the oil can be reduced, thereby achieving the purpose of double noise reduction. The closed chamber is filled with noise reduction liquid, and the amount of oil inside the compressor will not be consumed, and the performance of the compressor will not be affected.

[0029] In order to prevent the pump body from being contaminated, the noise reduction liquid filled in the closed chamber 2 is made of the same material as the oil below the lower flange 1 .

[0030] Embodiment 1:

[0031] like Figure 1 and Figure 2As shown, in the present embodiment, the muffler body is a single-layer muffler structure. In order to prevent the noise reduction liquid in the closed chamber 2 from contacting with the crankshaft 100 rotating and passing through the muffler body and causing leakage, in the present invention, the closed chamber 2 is an annular structure with an opening in the middle for the crankshaft 100 to pass through, and there is a clearance fit between the crankshaft 100 and the opening in the middle of the closed chamber 2. The shape and specifications of the circumferential wall of the closed chamber 2 are the same as the specifications of the inner cavity of the muffler body and are welded to the inner wall of the muffler body. The top and bottom of the closed chamber 2 are open structures, and the closed chamber 2 is formed by covering the isolation layer 3; the bottom of the closed chamber 2 is fitted with the end face of the lower flange 1. It should be noted that, in the present embodiment, the height of the closed chamber 2 is less than the height of the inner cavity of the muffler body, and the isolation layer 3 covers the entire bottom and top areas of the closed chamber 2.

[0032] In order to allow gas to pass through the sealed chamber 2 while preventing the oil below the lower flange 1 from entering the sealed chamber 2, the isolation layer 3 is made of a PTFE microporous membrane. The microporous membrane made of PTFE polytetrafluoroethylene material allows gas molecules to pass through while preventing oil from passing through, and has the effects of oil-proof and breathable and resisting organic solvents.

[0033] In order to fix the isolation layer 3 and prevent it from being deformed or damaged by gas impact, a partition layer capable of cutting and dispersing bubbles is arranged outside the isolation layer 3. The partition layers are arranged below the lower isolation layer 3 and above the upper isolation layer 3, respectively.

[0034] Furthermore, the partition layer is made of a filter screen 4. In order to disperse the bubbles, the pore size of the filter screen 4 is as small as possible.

[0035] The filter screen 4 is made of a filter screen capable of bearing the weight of the noise reduction liquid and the isolation layer 3 in the closed chamber 2 .

[0036] Embodiment 2:

[0037] like Figure 3-Figure 6 As shown, in this embodiment, the muffler body is a double-layer muffler structure, including a muffler inner layer 5 and a muffler outer layer 6 , and the closed chamber 2 is arranged inside the muffler inner layer 5 .

[0038] In order to prevent the noise reduction liquid in the closed chamber 2 from contacting with the crankshaft 100 rotating and penetrating the muffler body and causing leakage, in the present invention, the closed chamber 2 is an annular structure with an opening in the middle for the crankshaft 100 to pass through, and there is a clearance fit between the crankshaft 100 and the opening in the middle of the closed chamber 2. The shape and specifications of the peripheral side wall and the top side wall of the closed chamber 2 are the same as the specifications of the inner cavity of the muffler body, and are welded on the inner wall of the muffler body. The bottom of the closed chamber 2 is fitted with the end face of the lower flange 1. It should be noted that in this embodiment, the height of the closed chamber 2 is equal to the height of the muffler inner layer 5, and an air hole is opened on the top side wall of the closed chamber 2 corresponding to the exhaust hole 200 on the muffler inner layer 5. The isolation layer 3 covers the entire bottom area and the air hole area of ​​the closed chamber 2. The closed chamber 2 is a bottom open structure, and the closed chamber 2 is formed by the isolation layer 3.

[0039] In order to allow gas to pass through the sealed chamber 2 while preventing the oil below the lower flange 1 from entering the sealed chamber 2, the isolation layer 3 is made of a PTFE microporous membrane. The microporous membrane made of PTFE polytetrafluoroethylene material allows gas molecules to pass through while preventing oil from passing through, and has the effects of oil-proof and breathable and resisting organic solvents.

[0040] In order to fix the isolation layer 3 and prevent it from being deformed or damaged by gas impact, a partition layer capable of cutting and dispersing bubbles is arranged outside the isolation layer 3. The partition layers are arranged below the lower isolation layer 3 and above the upper isolation layer 3, respectively.

[0041] Furthermore, the partition layer is made of a filter screen 4. In order to disperse the bubbles, the pore size of the filter screen 4 is as small as possible.

[0042] The filter screen 4 is made of a filter screen capable of bearing the weight of the noise reduction liquid and the isolation layer 3 in the closed chamber 2 .

[0043] The present invention provides a compressor, comprising a lower flange 1, a crankshaft 100 and the above-mentioned muffler.

[0044] In order to fix the oil as the noise reduction liquid in the closed chamber of the muffler body, the present invention uses a PTFE material microporous membrane. This material can ensure that liquid molecules will not pass through, but can allow gas molecules to pass through, thereby fixing the oil in the muffler without losing oil, and allowing the gas to be discharged to achieve the purpose of noise reduction; the muffler of the present invention can reduce the difficulty of noise reduction of a large series of variable frequency compressors, and fully utilize the characteristics of refrigerant flow rate and different frequency and rotation speed to reasonably reduce noise during the noise reduction process; while keeping the pump body structure unchanged, the noise problem of large-displacement compressors is eliminated, making the noise reduction of the variable frequency machine easier, and also avoiding the characteristics of changing the pump body structure due to different refrigerants, reducing development costs.

[0045] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A muffler, comprising a muffler body arranged on a lower flange, characterized in that: The muffler body has a sealed chamber near one end of the lower flange, the sealed chamber is filled with noise reduction liquid, and the bottom and top of the sealed chamber are provided with an isolation layer that allows gas to pass through but liquid cannot pass through; The enclosed chamber is an annular structure, with the circumferential side walls being fitted and connected to the inner wall of the muffler body, and the bottom being fitted and arranged with the end face of the lower flange. The height of the enclosed chamber is smaller than the height of the inner cavity of the muffler body, and the isolation layer covers the entire bottom and top areas of the enclosed chamber.

2. The muffler according to claim 1, characterized in that: The noise reduction liquid filled in the closed chamber is made of the same material as the oil below the lower flange.

3. The muffler according to claim 1, characterized in that: The muffler body is a double-layer muffler structure, including a muffler inner layer and a muffler outer layer, and the closed chamber is arranged in the muffler inner layer.

4. The muffler according to claim 3, characterized in that: The closed chamber is an annular structure, with the peripheral side wall and the top side wall being fitted and connected to the inner wall of the inner layer of the muffler, and the bottom being fitted and arranged with the end face of the lower flange. An air hole is provided on the top side wall of the closed chamber corresponding to the position of the exhaust hole on the inner layer of the muffler, and the isolation layer covers the entire bottom area of ​​the closed chamber and the air hole area.

5. The muffler according to claim 1, characterized in that: The isolation layer is made of PTFE microporous membrane.

6. The muffler according to any one of claims 1 to 5, characterized in that: A dividing layer capable of cutting and dispersing bubbles is arranged outside the isolation layer.

7. The muffler according to claim 6, characterized in that: The dividing layer is made of a filter net.

8. The muffler according to claim 7, characterized in that: The filter screen is made of a filter screen capable of bearing the weight of the noise reduction liquid in the closed chamber and the isolation layer.

9. A compressor, characterized in that: The invention comprises a lower flange, a crankshaft and a muffler as claimed in any one of claims 1 to 8.

Images