CN211008996U

CN211008996U - Silencer, compressor and refrigerator

Info

Publication number: CN211008996U
Application number: CN201921941096.6U
Authority: CN
Inventors: 衡攀攀; 黄传顺
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-07-14
Anticipated expiration: 2029-11-11

Abstract

The application provides a muffler, a compressor and a refrigerator. The silencer comprises a shell, wherein an inner cavity of the shell is divided into a first silencing cavity (1), a second silencing cavity (2) and a third silencing cavity (3), an air inlet (10) and an air outlet (11) are formed in the shell, the first silencing cavity (1) is communicated with the air inlet (10), the third silencing cavity (3) is communicated with the air outlet (11), the second silencing cavity (2) and the first silencing cavity (1) are respectively located on two sides of the third silencing cavity (3), the first silencing cavity (1) is communicated with the second silencing cavity (2) through a communication channel (16), the communication channel (16) is isolated from the third silencing cavity (3), and the second silencing cavity (2) is communicated with the third silencing cavity (3) from the bottom. According to the muffler of the application, can reduce the local pressure loss among the amortization process, on the basis that does not influence gaseous efficiency of breathing in, effective noise reduction.

Description

Silencer, compressor and refrigerator

Technical Field

The application relates to the technical field of compressors, in particular to a silencer, a pump body assembly, a compressor and a refrigerator.

Background

The existing refrigerator compressor is structurally a crank-link mechanism, a crankshaft is driven by a motor to drive a connecting rod and a piston, and the suction and compression of a refrigerant are realized by a reed type suction and exhaust valve plate. In order to reduce noise, the air inlet pipe and the air outlet pipe of the compressor are both provided with an air suction silencer and an air exhaust silencer. The existing suction muffler generally comprises an upper muffling chamber, a lower muffling chamber and a partition plate with a conduction pipe, and the existing muffling chamber has a simpler structure and is not particularly ideal for the muffling effect of a compressor in order to facilitate manufacturing and assembly.

The utility model discloses a silencer of breathing in of refrigerator compressor among the prior art, this silencer cavity simple structure, the gas circulation return circuit distance is more near, can effectual reduction circulation resistance loss, but the air current directly flows into the upper chamber through two pipes on the insert tube on the baffle, very easily causes the increase of local pressure loss, and then influences the loss of pressure of whole air current, and then influences the efficiency of complete machine, although this silencer of breathing in can the noise reduction in addition, but the ability of making an uproar is limited.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a muffler, compressor and refrigerator, can reduce the local pressure loss in the amortization process, on the basis that does not influence gaseous efficiency of breathing in, effective noise reduction.

In order to solve the problems, the application provides a silencer, which comprises a shell, wherein an inner cavity of the shell is divided into a first silencing cavity, a second silencing cavity and a third silencing cavity, an air inlet and an air outlet are formed in the shell, the first silencing cavity is communicated with the air inlet, the third silencing cavity is communicated with the air outlet, the second silencing cavity and the first silencing cavity are respectively located on two sides of the third silencing cavity, the first silencing cavity and the second silencing cavity are communicated through a communication channel, the communication channel is isolated from the third silencing cavity, and the second silencing cavity and the third silencing cavity are communicated from the bottom.

Preferably, the casing is including sealed upper cover and the lower cover that covers together, and the bottom of upper cover is provided with the sand grip, and the sand grip extends to the second amortization chamber from first amortization chamber, and the intercommunication passageway is located the sand grip.

Preferably, a first partition plate and a second partition plate are arranged in the shell, the first partition plate is arranged between the first silencing cavity and the third silencing cavity at intervals, the second partition plate is arranged between the second silencing cavity and the third silencing cavity at intervals, and an overflowing channel communicated with the second silencing cavity and the third silencing cavity is formed between the bottom of the second partition plate and the bottom of the shell.

Preferably, the depth of the insertion of the rib in the first sound-deadening chamber is b, and the depth of the first sound-deadening chamber in the insertion direction of the rib is L2, where b is 0.5L 2, and/or the depth of the insertion of the rib in the second sound-deadening chamber is a, and the depth of the second sound-deadening chamber in the insertion direction of the rib is L1, where a is 0.5L 1.

Preferably, an air outlet pipe is arranged at the air outlet, the air outlet pipe extends towards the bottom of the shell, the depth of the third sound-absorbing cavity along the extending direction of the air outlet pipe is L3, and the extending length of the air outlet pipe is 0.25L 3.

Preferably, the first partition board is fixedly arranged on the lower cover, the second partition board is fixedly arranged on the upper cover, the partition board slots are formed in the lower cover, and the second partition board is inserted into the partition board slots.

Preferably, the volumes of the first sound-deadening chamber, the second sound-deadening chamber and the third sound-deadening chamber are different from each other.

Preferably, the housing further comprises a suction port connected to an outer end of the air inlet and disposed coaxially with the air inlet.

Preferably, the shell is further provided with an oil leakage hole, and the oil leakage hole is arranged at the bottom of the peripheral wall of the shell.

Preferably, the oil leakage hole is higher than the bottom plate of the shell, and the oil leakage hole is communicated with the first silencing cavity and the third silencing cavity at the same time.

Preferably, an oil leakage baffle is arranged at the oil leakage hole.

According to another aspect of the present application, there is provided a compressor comprising a muffler as described above.

According to another aspect of the present application, there is provided a refrigerator including a muffler as described above.

The utility model provides a silencer, which comprises a housin, the inner chamber of casing is separated for first amortization chamber, second amortization chamber and third amortization chamber, be provided with air inlet and gas outlet on the casing, first amortization chamber and air inlet intercommunication, third amortization chamber and gas outlet intercommunication, second amortization chamber and first amortization chamber are located third amortization chamber both sides respectively, and first amortization chamber and second amortization chamber communicate through communicating channel, communicating channel separates the chamber with the third amortization chamber, second amortization chamber and third amortization chamber communicate from the bottom. The utility model provides a muffler, whole cavity is separated for three amortization chamber, can make the amortization frequency channel widen of muffler, simultaneously with the help of the rational arrangement of the position in three amortization chamber, and realize the intercommunication in first amortization chamber and second amortization chamber through the intercommunication passageway, can make the circulation route of gas lengthen, the transmission loss increases, effectively reduce the local pressure loss of amortization in-process, under the condition that does not influence gas efficiency of breathing in, further noise reduction, the noise cancelling effect is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a muffler according to an embodiment of the present application;

FIG. 2 is a first axial exploded view of the muffler of the present application;

FIG. 3 is a second isometric exploded view of the muffler of an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a muffler according to an embodiment of the present application;

FIG. 5 is a left side view of a muffler of an embodiment of the present application;

FIG. 6 is a schematic view of the mounting structure of the muffler on the pump body assembly according to the embodiment of the present application;

fig. 7 is a graph showing a comparison of noise reduction amounts of the silencer according to the example of the present application and the silencer of the comparison document.

The reference numerals are represented as:

1. a first muffling chamber; 2. a second muffling chamber; 3. a third sound-deadening chamber; 4. an upper cover; 5. a lower cover; 6. a convex strip; 7. a first separator; 8. a second separator; 9. an air outlet pipe; 10. an air inlet; 11. an air outlet; 12. a partition plate slot; 13. an air suction port; 14. an oil leak hole; 15. an oil leakage baffle; 16. a communication channel.

Detailed Description

Referring to fig. 1 to 7 in combination, according to an embodiment of the present application, the muffler includes a housing, an inner cavity of the housing is divided into a first muffling chamber 1, a second muffling chamber 2 and a third muffling chamber 3, an air inlet 10 and an air outlet 11 are provided on the housing, the first muffling chamber 1 is communicated with the air inlet 10, the third muffling chamber 3 is communicated with the air outlet 11, the second muffling chamber 2 and the first muffling chamber 1 are respectively located at two sides of the third muffling chamber 3, the first muffling chamber 1 and the second muffling chamber 2 are communicated through a communication channel 16, the communication channel 16 is communicated with the third muffling chamber 3, and the second muffling chamber 2 and the third muffling chamber 3 are isolated from the bottom.

The utility model provides a muffler, whole cavity is separated for three amortization chamber, can make the amortization frequency channel widen of muffler, simultaneously with the help of the rational arrangement of the position in three amortization chamber, make first amortization chamber 1 and second amortization chamber 2 be located the both sides of third amortization chamber 3 respectively, and realize the intercommunication in first amortization chamber 1 and second amortization chamber 2 through communicating channel 16, can make the circulation route of gas lengthen, the transmission loss increases, effectively reduce the local pressure loss of amortization in-process, under the condition that does not influence gaseous efficiency of breathing in, further noise reduction, improve the noise cancelling effect.

In addition, in the present application, the second muffling chamber 2 is communicated with the third muffling chamber 3 from the bottom, and when the communicating channel 16 is located at the top, the air flow has a flow path that enters the first muffling chamber 1 from the air inlet 10, then enters the top of the second muffling chamber 2 from the top of the first muffling chamber 1 through the communicating channel 16, then flows from the top of the second muffling chamber 2 to the bottom of the second muffling chamber 2, and flows from the bottom of the second muffling chamber 2 to the bottom of the third muffling chamber 3, and then exits the muffler from the air outlet 11 at the top of the third muffling chamber 3, so that the air flow path can be maximized, and a better noise reduction effect can be achieved.

After adopting the above-mentioned embodiment of this application, for the prior application that inventor's application number is 201811162125.9, the muffler of this application has adopted three amortization chamber, the muffler of prior application has adopted five amortization chambers, therefore this application has reduced the quantity in amortization chamber by a wide margin, because the flow path length of gaseous in this application does not correspondingly reduce by a wide margin, consequently can obtain the silencing effect basically the same with the prior application under the condition that reduces the muffler volume by a wide margin, for this prior application, can realize the miniaturization and the lightweight of muffler more conveniently, reduce the structural complexity of muffler simultaneously, reduce processing cost and processing degree of difficulty.

Referring to FIG. 7, the muffler of the embodiment of the present application is shown to compare the muffling amount with that of the embodiment of the prior application, and the volume of the muffler of the embodiment of the present application is 77280mm³The reduction is 54845mm³The volume reduction amplitude reaches 30%, the noise elimination amount is about 40dB basically at 500-2000 Hz, 2000-3000 Hz and 3000-4500 Hz, the core frequency band of the compressor noise is basically covered, and the noise elimination effect is equivalent to that of the noise elimination effect of the prior application in the same frequency band.

The casing is including sealed upper cover 4 and the lower cover 5 that is in the same place, and the bottom of upper cover 4 is provided with sand grip 6, and sand grip 6 extends to second amortization chamber 2 from first amortization chamber 1, and intercommunication passageway 16 is located sand grip 6. In this embodiment, the rib 6 is integrally formed with the upper cover 4 and protrudes from the bottom surface of the upper cover 4, and the communication channel 16 penetrates through the rib 6 along the extending direction of the rib 6, so as to communicate the first muffling chamber 1 and the second muffling chamber 2 at the two ends of the rib 6. The upper cover 4 and the lower cover 5 are provided with upper and lower step grooves for tight assembly so as to ensure the integral sealing performance of the silencer.

Also can the shaping respectively between sand grip 6 and the upper cover 4, can set up the mounting groove at the side of upper cover 4 orientation amortization chamber, and the mounting groove extends to second amortization chamber 2 from first amortization chamber 1, and sand grip 6 is the shaping of processing alone, and processing has the intercommunication passageway 16 that runs through sand grip 6 on sand grip 6, and sand grip 6 inlays to be established in the mounting groove on upper cover 4. In this kind of structure, because sand grip 6 and upper cover 4 separately-formed, consequently the processing of intercommunication passageway 16 is more simple and convenient, can reduce the processing degree of difficulty on the whole.

A first partition plate 7 and a second partition plate 8 are arranged in the shell, the first partition plate 7 is arranged between the first silencing cavity 1 and the third silencing cavity 3 at intervals, the second partition plate 8 is arranged between the second silencing cavity 2 and the third silencing cavity 3 at intervals, and an overflowing channel communicated with the second silencing cavity 2 and the third silencing cavity 3 is formed between the bottom of the second partition plate 8 and the bottom of the shell.

The first partition plate 7 completely separates the first silencing cavity 1 from the third silencing cavity 3, so that the first silencing cavity 1 is prevented from being directly communicated with the third silencing cavity 3, gas can enter the third silencing cavity 3 only after flowing through the second silencing cavity 2 from the first silencing cavity 1, the air flow circulation path is maximized, and the silencing and noise reduction effects of the silencer are improved.

The top of the second partition plate 8 is hermetically connected with the upper cover 4, the two sides of the second partition plate are hermetically connected with the lower cover 5, and due to the fact that a gap exists between the bottom of the second partition plate 8 and the bottom plate of the lower cover 5, an overflowing channel communicated with the second silencing cavity 2 and the third silencing cavity 3 can be formed through the gap, and air flow can smoothly flow to the third silencing cavity 3 through the second silencing cavity 2.

Preferably, the depth of insertion of the rib 6 in the first sound-deadening chamber 1 is b, and the depth of the first sound-deadening chamber 1 in the direction of insertion of the rib 6 is L2, where b is 0.5L 2, and/or the depth of insertion of the rib 6 in the second sound-deadening chamber 2 is a, and the depth of the second sound-deadening chamber 2 in the direction of insertion of the rib 6 is L1, where a is 0.5L 1.

According to the silencing theory of the simple expansion chamber silencer, the silencing quantity of a single chamber is as follows:

Δ L is 10lg (1+0.25(m-1/m)2sin2k L, where m is the ratio of the cross-sectional area of the muffling chamber to the cross-sectional area of the inner cannula, k is the wave velocity, and L is the length of the muffling chamber.

When the silencing chamber is divided into two silencing chambers, the total silencing volume is that delta L ═ delta L1 + delta L2 ═ 10lg (1+0.25(m1-1/m1)2sin2k L +10lg (1+0.25(m2-1/m2)2sin2k L;

in the formula, m1 and m2 are expansion ratios of the silencing chambers, the main frequency band for silencing is k L ═ n +0.5 pi, n ═ 0,1,2 and 3 …, when m1 and m2 are greater than 4, Δ L '> Δ L, when m1 ═ m2 ═ m/2, Δ L' is the largest, so that the expansion ratios of the silencing chambers are all greater than 4, the volumes of the silencing chambers are moderate as much as possible, and the compressor has stronger silencing capability in the main noise frequency band and better noise reduction effect.

An air outlet pipeline 9 is arranged at the air outlet 11, the air outlet pipeline 9 extends out to the bottom of the shell, the depth of the third sound-absorbing cavity 3 along the extending direction of the air outlet pipeline 9 is L3, and the extending length of the air outlet pipeline 9 is 0.25L 3.

The silencing characteristic of the existing silencer is periodically changed, namely sound waves of certain frequencies can pass through the silencer without attenuation, because the frequency range of noise is generally wider, if the silencer can only eliminate certain frequency cost, other frequency components can pass through smoothly, which is obviously unreasonable, when the length of an inserted connecting pipe is 1/2 of the length of an expansion part, odd-number times of passing frequency can be eliminated, and when the length of the inserted connecting pipe is 1/4 of the length of the expansion part, even-number times of passing frequency can be eliminated.

Preferably, the volumes of the first sound-deadening chamber 1, the second sound-deadening chamber 2 and the third sound-deadening chamber 3 are different from each other, so that the sound-deadening frequency of each sound-deadening chamber is different, the sound-deadening frequency band of the silencer is widened, and the sound-deadening capacity of the silencer is improved.

The existing silencer usually comprises an upper silencing chamber, a lower silencing chamber and a partition plate with a conduction pipe, so that the existing silencing chamber is simple in structure, short in gas circulation loop and limited in sound absorption energy, and is not particularly ideal in silencing effect of a compressor in order to facilitate manufacturing and assembly. This application muffler satisfies under the condition that the low frequency noise required within 1000Hz, compressor noise peak frequency point generally is 2000Hz ~ 3500Hz, and this application muffler falls the volume of making an uproar well at 2000Hz ~ 4000Hz, basically more than 40dB, separate whole amortization chamber for the volume cavity of 3 not equidimensions through the baffle, make the amortization frequency channel widen of muffler, simultaneously with the help of baffle and upper cover runner, make the circulation route of gas lengthen, the transmission loss increases, and then under the condition that does not influence gas efficiency of breathing in, further noise reduction.

The first partition plate 7 is fixedly arranged on the lower cover 5, the second partition plate 8 is fixedly arranged on the upper cover 4, a partition plate slot 12 is formed in the lower cover 5, and the second partition plate 8 is inserted in the partition plate slot 12. Through setting up baffle slot 12, can lead to the installation of second baffle 8 on the one hand, and then realize upper cover 4 and lower cover 5 complex direction through the direction to second baffle 8, on the other hand can strengthen second baffle 8 through baffle slot 12 and to second amortization chamber 2 and the isolation effect on upper portion of third amortization chamber 3 for gas can only enter into in the third amortization chamber 3 via the passageway that overflows of bottom.

The housing further includes a suction port 13, and the suction port 13 is connected to an outer end of the air inlet 10 and is disposed coaxially with the air inlet 10. By adopting the structure, the air inlet 10 and the air suction port 13 can be positioned on the same axis, so that only one-time core pulling is needed during injection molding, the processing procedure is simplified, the processing cost of the silencer is reduced, and the economy of the whole silencer is improved.

The shell is also provided with an oil leakage hole 14, and the oil leakage hole 14 is arranged at the bottom of the peripheral wall of the shell. Because the oil leakage hole 14 is arranged on the peripheral wall instead of the bottom plate, the problem that oil leakage cannot be carried out due to the fact that the oil leakage hole at the lower side is immersed by an oil pool can be avoided, and the function of the oil leakage hole 14 can be guaranteed to be always kept normal. The diameter of the oil leakage hole is 2.5 mm-3.5 mm.

The oil leakage hole 14 is higher than the bottom plate of the shell, the oil leakage hole 14 is communicated with the first silencing cavity 1 and the third silencing cavity 3 simultaneously, the sucked refrigerating oil mixed in the refrigerant can be discharged, the refrigerating oil mist is prevented from being sucked into the silencing cavity and discharged along with the refrigerant, the pump body is not fully cooled, the suction overheating is caused, and the performance of the whole compressor is further influenced.

The oil leakage baffle 15 is arranged at the position of the oil leakage hole 14, the oil leakage baffle 15 can also be made into a square shape or a circular shape, the thickness is 0.8 mm-1.5 mm, on one hand, the oil can be prevented from dripping into the oil leakage hole along the side wall, on the other hand, oil is stirred by an oil pump at the bottom of the oil pool, under the condition that the space of the lower shell is limited, the oil injection amount can be increased, and further the oil amount required by the lubrication circulation of the pump body system is.

According to an embodiment of the present application, the compressor includes a muffler, which is the above-described muffler.

The compressor comprises a mechanical pump body part consisting of components such as a cylinder seat and the like and a motor assembly consisting of a stator and a rotor, wherein the stator is fixed on a machine leg of the cylinder seat, the rotor is in interference fit on a crankshaft, the pump body assembly comprises a valve group assembly consisting of a cylinder cover, an air outlet channel of a silencer is tightly fixed at an air suction port of a valve plate in the cylinder cover assembly by a screw, an air inlet pipeline of the air suction silencer is aligned with an air inlet pipe of a shell of the compressor, then a motor drives a crank link mechanism, and further a reed air suction valve plate and an exhaust valve plate are enabled to suck and compress refrigerants.

According to an embodiment of the present application, a refrigerator includes a muffler, which is the above-described muffler.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The silencer is characterized by comprising a shell, wherein an inner cavity of the shell is divided into a first silencing cavity (1), a second silencing cavity (2) and a third silencing cavity (3), an air inlet (10) and an air outlet (11) are formed in the shell, the first silencing cavity (1) is communicated with the air inlet (10), the third silencing cavity (3) is communicated with the air outlet (11), the second silencing cavity (2) and the first silencing cavity (1) are respectively located on two sides of the third silencing cavity (3), the first silencing cavity (1) is communicated with the second silencing cavity (2) through a communicating channel (16), the communicating channel (16) is separated from the third silencing cavity (3), and the second silencing cavity (2) is communicated with the third silencing cavity (3) from the bottom.

2. A silencer according to claim 1, characterized in that the housing comprises an upper cover (4) and a lower cover (5) which are sealed together, the bottom of the upper cover (4) being provided with a rib (6), the rib (6) extending from the first silencing chamber (1) to the second silencing chamber (2), the communication channel (16) being located in the rib (6).

3. A silencer according to claim 2, characterized in that a first partition (7) and a second partition (8) are arranged in the housing, the first partition (7) is arranged at intervals between the first silencing chamber (1) and the third silencing chamber (3), the second partition (8) is arranged at intervals between the second silencing chamber (2) and the third silencing chamber (3), and an overflow channel communicating the second silencing chamber (2) and the third silencing chamber (3) is formed between the bottom of the second partition (8) and the bottom of the housing.

4. A silencer according to claim 3, characterized in that the depth of insertion of the bead (6) in the first sound-deadening chamber (1) is b, the depth of the first sound-deadening chamber (1) in the direction of insertion of the bead (6) is L2, where b is 0.5L 2, and/or that the depth of insertion of the bead (6) in the second sound-deadening chamber (2) is a, and the depth of the second sound-deadening chamber (2) in the direction of insertion of the bead (6) is L1, where a is 0.5L 1.

5. A silencer according to claim 1, characterized in that an outlet duct (9) is provided at the outlet (11), the outlet duct (9) projecting towards the bottom of the housing, the third sound-deadening chamber (3) having a depth of L3 in the direction of extension of the outlet duct (9), the outlet duct (9) having a projecting length of 0.25L 3.

6. A silencer according to claim 3, characterized in that the first partition (7) is fixedly arranged on the lower cover (5), the second partition (8) is fixedly arranged on the upper cover (4), a partition slot (12) is arranged in the lower cover (5), and the second partition (8) is inserted in the partition slot (12).

7. A silencer according to claim 1, characterized in that the volumes of the first (1), second (2) and third (3) chambers differ.

8. A silencer according to any of claims 1 to 7, characterized in that the housing further comprises a suction opening (13), which suction opening (13) is connected to the outer end of the inlet opening (10) and is arranged coaxially with the inlet opening (10).

9. A silencer according to any of claims 1 to 7, characterized in that the housing is further provided with oil leakage holes (14), the oil leakage holes (14) being provided at the bottom of the peripheral wall of the housing.

10. A muffler according to claim 9, wherein the oil leak hole (14) is higher than the bottom plate of the housing, and the oil leak hole (14) communicates with both the first muffling chamber (1) and the third muffling chamber (3).

11. A silencer according to claim 9, characterized in that an oil leakage baffle (15) is arranged at the oil leakage hole (14).

12. A compressor comprising a muffler, wherein the muffler is as claimed in any one of claims 1 to 11.

13. A refrigerator comprising a muffler, characterized in that the muffler is the muffler of any one of claims 1 to 11.