A serpentine connecting pipe silencer for a refrigerator compressor

Abstract

The present invention discloses a serpentine connecting pipe muffler for a refrigerator compressor, which includes an upper muffler chamber and a lower muffler chamber. The lower muffler chamber includes a connector assembly, a left muffler expansion chamber, and a right muffler expansion chamber. The connector assembly includes a serpentine connecting pipe and a partition plate fixedly connected to the serpentine connecting pipe. The serpentine connecting pipe includes a U-shaped bent pipe portion, a neck pipe portion, and a tail pipe portion. A pair of symmetrically arranged opening slits are provided on the U-shaped bent pipe portion. By setting the cooperation of the serpentine connecting pipe and the opening slits, and using the Helmholtz resonance noise reduction principle, the present invention can effectively adjust the noise reduction frequency range and increase the noise reduction volume in the target frequency band.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration compressor equipment, and particularly to a serpentine connecting pipe muffler for a refrigerator compressor. Background Art

[0002] With the increasing improvement of people's material living standards, refrigerators have become common household appliances. However, due to the development trend of housing area miniaturization caused by high housing prices, the noise quality of refrigerators has gradually become the main concern for people when purchasing. And the compressor, as the "heart" of the refrigerator system, is the main noise source of the refrigerator. The reasons for compressor noise generation are relatively complex: including the friction of mechanical moving pairs during the operation of the compressor, the opening and closing of suction and exhaust valves, suction and exhaust pulsations, as well as electromagnetic excitation and other vibrations. Among the many noise sources of the compressor, the suction muffler arranged between the suction pipe of the compressor and the suction valve plate is one of the important components that can effectively reduce the compressor noise, and has always been the focus of refrigerator noise reduction design. Currently, the commonly used muffler is generally designed with a silencing structure of a two-stage expansion chamber with upper and lower chambers.

[0003] The Chinese invention patent with the application number CN201611047773.0 was publicly disclosed on May 29, 2018, which discloses a suction muffler for a compressor. The partition plate is arranged between the upper shell and the lower shell, the serpentine pipe assembly is arranged between the partition plate and the lower shell, the suction pipe is connected to the serpentine pipe assembly, and the suction pipe is located outside the lower shell. The partition plate includes an air pipe, a support plate and a fixing plate; the support plate is located above the lower shell, the fixing plate and the air pipe are located inside the shell of the upper shell, the air pipe is fixed on the support plate, the air outlet of the air pipe is connected to the air outlet pipe of the upper shell, and the air inlet is connected to the outlet of the serpentine pipe assembly. The fixing plate is vertically arranged on the support plate along the axis direction of the muffler, the fixing plate is connected to the pipe body of the air pipe, and the fixing plate divides the space formed by the partition plate and the shell of the upper shell into a first silencing chamber and a second silencing chamber. The part of the air pipe located in the first silencing chamber is provided with a first expansion hole, and the part of the air pipe located in the second silencing chamber is provided with a second expansion hole; however, the defect of this solution is that since the tail end of the serpentine pipe assembly is suspended, it is very easy to generate vibration during suction, becoming a noise source. Summary of the Invention

[0004] The purpose of the present invention is to provide a serpentine connecting pipe muffler for a refrigerator compressor aiming at the problems existing in the prior art. By setting the cooperation of the serpentine connecting pipe and the opening slit, and using the Helmholtz resonance sound absorption principle, the sound absorption frequency range can be effectively adjusted, and the sound absorption volume in the target frequency band can be increased.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A serpentine connecting pipe silencer for a refrigerator compressor, comprising an upper silencing chamber and a lower silencing chamber. A horizontal partition plate is provided between the upper silencing chamber and the lower silencing chamber. An air outlet pipe is connected to the upper side of the upper silencing chamber, and a suction pipe is connected to the outside of the lower silencing chamber. The lower silencing chamber includes a connecting component, and the connecting component includes a serpentine connecting pipe and a partition plate fixedly connected to the serpentine connecting pipe. The partition plate divides the lower silencing chamber into a left silencing expansion chamber and a right silencing expansion chamber. The serpentine connecting pipe includes a first half pipe and a second half pipe that are split in half. The partition plate includes a first half partition plate and a second half partition plate that are symmetrically separable. The first half pipe is fixedly connected to the first half partition plate, and the second half pipe is fixedly connected to the second half partition plate. Bar-shaped installation grooves are symmetrically provided on both side walls of the lower silencing chamber, and both side edges of the partition plate are clamped in the bar-shaped installation grooves. The serpentine connecting pipe includes a U-shaped bent pipe portion, and a neck pipe portion and a tail pipe portion respectively connected to both ends of the U-shaped bent pipe portion. The U-shaped bent pipe portion is located in the left silencing expansion chamber, and at least one pair of opening slits are provided on the U-shaped bent pipe portion. The two opening slits are symmetrical to each other and are respectively provided on the first half pipe and the second half pipe. An air inlet communicating with the suction pipe is provided below one side of the right silencing expansion chamber, and a spoiler is provided on the side of the right silencing expansion chamber where the air inlet is located. The spoiler abuts against one side of the end of the tail pipe portion.

[0007] The above silencer is an internal component of a refrigerator compressor, and is specifically arranged between the suction pipe of the compressor cylinder and the suction valve plate, and is used for noise reduction when the low-temperature and low-pressure gas inhaled by the cylinder. Therefore, the noise reduction ability is the most critical index for judging the quality of the silencer.

[0008] The key improvement of this application compared with the existing products lies in, firstly, by arranging the serpentine connecting pipe, the air flow direction is changed multiple times, thereby increasing the flow resistance of the gas, increasing the energy attenuation generated by the sound wave due to reflection in the pipeline, and having the effect of enhancing sound absorption;

[0009] Secondly, by arranging the U-shaped bent pipe portion in the left silencing expansion chamber and cooperating with the opening slits, adjusting the position of the opening slits, and using the Helmholtz resonance sound absorption principle, the sound absorption frequency range can be effectively adjusted, and the sound absorption volume in the target frequency band can be increased;

[0010] Thirdly, both the serpentine connecting pipe and the partition plate adopt a split design, which has a simple structure, higher structural strength, is convenient for processing and assembly, and is more conducive to adjusting and designing the position, quantity and size of the opening slits;

[0011] Fourthly, strip-shaped mounting grooves are symmetrically arranged on both side walls of the lower anechoic chamber, and both side edges of the partition board are clamped in the strip-shaped mounting grooves. By quickly replacing different connector components, the partition board is located at different positions of the serpentine connecting pipe, so as to adjust the ratio of the serpentine connecting pipe located in the left anechoic expansion chamber and the right anechoic expansion chamber, and meet the requirements of the anechoic volume of different target frequency bands;

[0012] Fifthly, the spoiler forms a support for the lower end port of the serpentine connecting pipe, reduces the vibration noise of the serpentine connecting pipe itself, adjusts the direction of the airflow when entering at the same time, reduces the turbulence phenomenon, reflects the sound wave propagation direction, forms a certain sound wave cancellation effect, and achieves the structural noise reduction effect;

[0013] Sixthly, by making the two opening slits symmetrical to each other and respectively arranged on the first half pipe and the second half pipe, the forces exerted by the airflows flowing out and flowing in from both sides of the serpentine connecting pipe cancel each other out, and the vibration noise of the serpentine connecting pipe is reduced.

[0014] Furthermore, the horizontal partition board is provided with an upper and lower cavity through pipe vertically penetrating through it. The neck pipe part is connected to the upper and lower cavity through pipe, and the bending direction of the neck pipe part is opposite to the bending direction of the U-shaped bend pipe part. By arranging the neck pipe part, the airflow is commutated multiple times in the serpentine connecting pipe and diffuses into the upper anechoic chamber through the upper and lower cavity through pipe, further improving the anechoic effect.

[0015] Furthermore, the neck pipe part is located between the left anechoic expansion chamber and the right anechoic expansion chamber, and the neck pipe part is fixedly connected to the partition board. By fixedly connecting the neck pipe part to the partition board, the partition board forms a support for the neck pipe part, reducing the vibration noise of the serpentine connecting pipe itself.

[0016] Furthermore, the port of the tail pipe part is arranged opposite to the air inlet and there is a gap between them. The gas enters the anechoic expansion chamber through the gap between the tail pipe part and the air inlet and expands rapidly, slowing down the flow rate of the airflow and reducing the pressure of the airflow, thereby reducing the intake noise.

[0017] Furthermore, the port of the tail pipe part has an inclined angle relative to the air inlet. By making the angle between the tail pipe part and the air inlet inclined, an angle is formed when the airflow flowing out from the air inlet enters the tail pipe part, and the airflow is retarded by the inclined inner wall of the tail pipe part, reducing the flow rate, and further reducing the noise.

[0018] Furthermore, connecting ears are arranged at the lower end parts of both the first half pipe and the second half pipe. The connecting ear of the first half pipe is provided with a blind hole, and the connecting ear of the second half pipe is provided with a pin inserted into the blind hole. The lower end parts of the first half pipe and the second half pipe are in interference fit through the connecting ears, making the connection between the first half pipe and the second half pipe more stable and reducing the vibration.

[0019] Further, the bending angle of the U-shaped elbow part is 60° to 150°, and one pair of the opening slits is arranged at the middle position of the U-shaped elbow part. By arranging the opening slits at the middle position of the U-shaped elbow part, the air flow is more likely to escape from the serpentine connecting pipe and enter the left sound-absorbing expansion chamber when passing through; by reducing the bending angle of the U-shaped elbow part, the retardation effect of the U-shaped elbow part on the air flow can be reduced, and the suction efficiency of the compressor can be improved. By increasing the bending angle of the U-shaped elbow part, the retardation effect of the U-shaped elbow part on the air flow can be increased, and the sound-absorbing effect of the muffler can be improved. By setting the bending angle of the U-shaped elbow part in the range of 60° to 150°, a balance between the suction efficiency and the sound-absorbing effect can be obtained.

[0020] The ratio of the sum of the neck pipe part and the tail pipe part to the U-shaped elbow part is less than 0.5. By increasing the proportion of the U-shaped elbow part in the whole serpentine connecting pipe, the sound-absorbing effect is further improved.

[0021] Further, a circle of convex platforms is vertically arranged on the upper end surface of the horizontal partition board. The convex platforms surround the upper port of the serpentine connecting pipe. A microporous separator (not shown in the figure) is arranged on the upper side of the convex platforms. The peripheral edge of the microporous separator is fixedly connected with the convex platforms through pins. The air flow flowing out of the serpentine connecting pipe is retarded by the microporous separator, and the flow rate and pressure of the air flow are further reduced, and then enter the air outlet pipe.

[0022] Further, a circle of connecting insertion plates is arranged on the upper end peripheral side wall of the lower sound-absorbing chamber. A connecting slot that is in interference fit with the connecting insertion plate is arranged on the peripheral side wall of the upper sound-absorbing chamber. The lower sound-absorbing chamber and the upper sound-absorbing chamber are detachably installed; an annular installation groove is arranged at the junction of the inner walls of the upper sound-absorbing chamber and the lower sound-absorbing chamber. The peripheral edge of the horizontal partition board is clamped in the annular installation groove.

[0023] Further, a sound-absorbing protrusion is arranged on the outer side of the end of the tail pipe part. A conical inner cavity channel is arranged inside the sound-absorbing protrusion. The sound-absorbing protrusion is located on the side away from the spoiler. By arranging the sound-absorbing protrusion and the spoiler opposite to each other and cooperating with each other, when the air flow in the tail pipe part flows out from the sound-absorbing protrusion, the end of the tail pipe part will not be forced to vibrate; by arranging the conical inner cavity channel, the air flow in the tail pipe part can be discharged more easily, forming a microcirculation with the air flow inhaled at the end, and reducing the air flow vibration noise caused by excessive vacuum force during suction.

[0024] Further, the first half pipe is provided with a step structure one along the end face of the pipe wall, and the second half pipe is provided with a step structure two along the end face of the pipe wall. The first half pipe and the second half pipe are clamped by the cooperation and insertion of the step structure one and the step structure two.

[0025] The upper end surface of the serpentine connecting pipe is provided with a step structure three that cooperates with the upper and lower cavity connecting pipes, and the step structure three realizes the stable installation of the serpentine connecting pipe and the upper and lower cavity connecting pipes.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. By setting the serpentine connecting pipe, the air flow changes direction multiple times, thereby increasing the flow resistance of the gas, increasing the energy attenuation generated by the reflection of sound waves in the pipeline, and having the effect of enhancing sound absorption;

[0028] 2. By arranging a U-shaped elbow part in the left sound-absorbing expansion cavity and cooperating with the opening slit, adjusting the position of the opening slit, and using the Helmholtz resonance sound absorption principle, the sound absorption frequency range can be effectively adjusted, and the sound absorption volume in the target frequency band can be increased;

[0029] 3. Both the serpentine connecting pipe and the partition plate adopt a split design, which has a simple structure, higher structural strength, is convenient for processing and assembly, and is more conducive to adjusting and designing the position, quantity and size of the opening slit;

[0030] 4. The two side edges of the partition plate are clamped in the strip-shaped installation groove. By quickly replacing different connector components, the partition plate is located at different positions of the serpentine connecting pipe, thereby adjusting the sizes of the left sound-absorbing expansion cavity and the right sound-absorbing expansion cavity to meet the requirements of different target frequency band sound absorption volumes;

[0031] 5. The spoiler forms a support for the lower end port of the serpentine connecting pipe, reducing the vibration noise of the serpentine connecting pipe itself. At the same time, it adjusts the direction of the air flow when entering, reduces the turbulence phenomenon, and reflects the sound wave propagation direction, forming a certain sound wave cancellation effect, achieving a structural noise reduction effect;

[0032] 6. By making the two opening slits symmetrical to each other and respectively arranged on the first half pipe and the second half pipe, the forces exerted by the air flows flowing out and flowing in from both sides of the serpentine connecting pipe cancel each other out, reducing the vibration noise of the serpentine connecting pipe. Description of the Drawings

[0033] Figure 1 It is a three-dimensional view of a serpentine connecting pipe silencer for a refrigerator compressor according to the present invention;

[0034] Figure 2 It is a cross-sectional view of a serpentine connecting pipe silencer for a refrigerator compressor according to the present invention;

[0035] Figure 3 It is a three-dimensional view of a connector assembly according to the present invention;

[0036] Figure 4 It is a schematic diagram after the disassembly of the connector assembly according to the present invention;

[0037] Figure 5 Schematic diagram of the first half pipe of the present invention;

[0038] Figure 6 Schematic diagram of the second half pipe of the present invention;

[0039] In the figure: 1, upper sound absorption chamber; 2, lower sound absorption chamber; 3, horizontal partition board; 4, air outlet pipe; 5, air suction pipe; 6, serpentine connecting pipe; 601, neck pipe part; 602, U-shaped elbow part; 603, tail pipe part; 7, partition board; 8, first half pipe; 9, second half pipe; 10, strip-shaped installation groove; 11, opening slit; 12, spoiler; 13, connecting ear; 14, boss; 15, sound absorption protrusion; 16, upper and lower cavity through pipe. Specific implementation mode

[0040] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "horizontal", "vertical", etc. are all based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0042] Such as Figures 1 to 6As shown in the figure, a serpentine connecting pipe silencer for a refrigerator compressor includes an upper silencing chamber 1 and a lower silencing chamber 2. A horizontal partition plate 3 is provided between the upper silencing chamber 1 and the lower silencing chamber 2. An air outlet pipe 4 is connected to the upper side of the upper silencing chamber 1, and a suction pipe 5 is connected to the outside of the lower silencing chamber 2. The lower silencing chamber 2 includes a connector assembly, and the connector assembly includes a serpentine connecting pipe 6 and a partition plate 7 fixedly connected to the serpentine connecting pipe 6. The partition plate 7 divides the lower silencing chamber 2 into a left silencing expansion chamber and a right silencing expansion chamber; the serpentine connecting pipe 6 includes a first half pipe 8 and a second half pipe 9 that are split in half. The partition plate 7 includes a first half partition plate and a second half partition plate that are symmetrically separable. The first half pipe 8 is fixedly connected to the first half partition plate, and the second half pipe 9 is fixedly connected to the second half partition plate; strip-shaped installation grooves 10 are symmetrically provided on both side walls of the lower silencing chamber, and both side edges of the partition plate 7 are clamped in the strip-shaped installation grooves 10; the serpentine connecting pipe 6 includes a U-shaped bent pipe portion 602 and a neck pipe portion 601 and a tail pipe portion 603 respectively connected to both ends of the U-shaped bent pipe portion 602. The U-shaped bent pipe portion 602 is located in the left silencing expansion chamber, and at least a pair of opening slits 11 are provided on the U-shaped bent pipe portion 602. The two opening slits 11 are symmetrical to each other and are respectively provided on the first half pipe 8 and the second half pipe 9; an air inlet communicating with the suction pipe 5 is provided below one side of the right silencing expansion chamber, and a spoiler 12 is provided on the side of the right silencing expansion chamber where the air inlet is located. The spoiler 12 abuts against one side of the end of the tail pipe portion 603.

[0043] The above silencer is an internal component of a refrigerator compressor, and is specifically arranged between the suction pipe of the compressor cylinder and the suction valve plate, and is used for noise reduction when the cylinder inhales low-temperature and low-pressure gas. Therefore, the noise reduction ability is the most critical index for judging the quality of the silencer.

[0044] The key improvement of this application compared with the existing products lies in, firstly, by setting the serpentine connecting pipe 6, the air flow direction is changed multiple times, thereby increasing the flow resistance of the gas and increasing the energy attenuation generated by the reflection of sound waves in the pipeline, which has the effect of enhancing sound absorption;

[0045] Secondly, by arranging the U-shaped bent pipe portion 602 in the left silencing expansion chamber and cooperating with the opening slits 11, adjusting the position of the opening slits 11, and using the Helmholtz resonance sound absorption principle, the sound absorption frequency range can be effectively adjusted, and the sound absorption volume in the target frequency band can be increased;

[0046] Thirdly, both the serpentine connecting pipe 6 and the partition plate 7 adopt a split design, which has a simple structure, higher structural strength, is convenient for processing and assembly, and is more conducive to adjusting and designing the position, quantity and size of the opening slits 11;

[0047] Fourthly, strip-shaped installation grooves 10 are symmetrically arranged on both side walls of the lower sound insulation chamber, and both side edges of the partition plate 7 are clamped in the strip-shaped installation grooves 10. By quickly replacing different connector components, the partition plate 7 is located at different positions of the serpentine connecting pipe 6, so as to adjust the ratio of the serpentine connecting pipe 6 located in the left sound insulation expansion chamber and the right sound insulation expansion chamber, and meet the requirements of the sound insulation volume of different target frequency bands;

[0048] Fifthly, the spoiler 12 supports the lower end port of the serpentine connecting pipe, reduces the vibration noise of the serpentine connecting pipe 6 itself, adjusts the direction of the airflow when entering at the same time, reduces the turbulence phenomenon, reflects the sound wave propagation direction, forms a certain sound wave cancellation effect, and achieves the structural noise reduction effect;

[0049] Sixthly, by making the two opening slits 11 symmetrical to each other and respectively arranged on the first half pipe 8 and the second half pipe 9, the forces of the airflow flowing out and flowing in from both sides of the serpentine connecting pipe 6 cancel each other out, reducing the vibration noise of the serpentine connecting pipe 6.

[0050] Furthermore, the horizontal partition plate 3 is provided with an upper and lower cavity through pipe 16 vertically penetrating through it. The neck pipe part is connected to the upper and lower cavity through pipe 16, and the bending direction of the neck pipe part 601 is opposite to the bending direction of the U-shaped bend pipe part 602. By setting the neck pipe part 601, the airflow is commutated multiple times in the serpentine connecting pipe 6 and diffuses into the upper sound insulation chamber through the upper and lower cavity through pipe 16, further improving the sound insulation effect.

[0051] Furthermore, the neck pipe part 601 is located between the left sound insulation expansion chamber and the right sound insulation expansion chamber, and the neck pipe part 601 is fixedly connected to the partition plate 7. By fixedly connecting the neck pipe part 601 to the partition plate 7, the partition plate 7 forms a support for the neck pipe part 601, reducing the vibration noise of the serpentine connecting pipe 6 itself.

[0052] Furthermore, the port of the tail pipe part 603 is arranged opposite to the air inlet and has a gap therebetween. The gas enters the right sound insulation expansion chamber through the gap between the tail pipe part 603 and the air inlet and expands rapidly, slowing down the flow rate of the airflow and reducing the pressure of the airflow, thereby reducing the intake noise.

[0053] Furthermore, the port of the tail pipe part 603 has an inclined angle relative to the air inlet. By making the angle between the tail pipe part 603 and the air inlet inclined, an angle is formed when the airflow flowing out from the air inlet enters the tail pipe part 603, and the airflow is retarded by the inclined inner wall of the tail pipe part 603, reducing the flow rate, and further reducing the noise.

[0054] Furthermore, connection lugs 13 are provided at the lower ends of the first half pipe 8 and the second half pipe 9. The connection lug 13 of the first half pipe 8 is provided with a blind hole, and the connection lug 13 of the second half pipe 9 is provided with a pin inserted into the blind hole. The lower ends of the first half pipe 8 and the second half pipe 9 are press-fitted through the connection lugs 13, making the connection between the first half pipe 8 and the second half pipe 9 more stable and reducing vibration.

[0055] Furthermore, the bending angle of the U-shaped bent pipe portion 602 is 60° to 150°, and one pair of the opening slits 11 are arranged at the middle position of the U-shaped bent pipe portion 602. By arranging the opening slits 11 at the middle position of the U-shaped bent pipe portion 602, it is easier for the air flow to escape from the serpentine communication pipe 6 and enter the left sound-absorbing expansion chamber when passing through; by reducing the bending angle of the U-shaped bent pipe portion 602, the resistance effect of the U-shaped bent pipe portion 602 on the air flow can be reduced, and the suction efficiency of the compressor can be improved. By increasing the bending angle of the U-shaped bent pipe portion 602, the resistance effect of the U-shaped bent pipe portion 602 on the air flow can be increased, and the sound-absorbing effect of the muffler can be improved. By setting the bending angle of the U-shaped bent pipe portion 602 within the range of 60° to 150°, a balance between the suction efficiency and the sound-absorbing effect can be obtained.

[0056] The ratio of the sum of the neck pipe portion 601 and the tail pipe portion 603 to the U-shaped bent pipe portion 602 is less than 0.5. By increasing the proportion of the U-shaped bent pipe portion 602 in the entire serpentine communication pipe, the sound-absorbing effect is further improved.

[0057] Furthermore, a circle of convex platforms 14 are vertically arranged on the upper end surface of the horizontal partition plate 3. The convex platforms 14 surround the upper port of the serpentine communication pipe 6. A microporous separator (not shown in the figure) is provided on the upper side of the convex platforms 14. The peripheral edge of the microporous separator is fixedly connected to the convex platforms through pins. The air flow flowing out of the serpentine communication pipe 6 is slowed down by the microporous separator, further reducing the flow rate and pressure of the air flow, and then enters the outlet pipe 4.

[0058] Furthermore, a circle of connection insertion plates are provided on the upper peripheral side wall of the lower sound-absorbing chamber 2, and connection slots that are in interference fit with the connection insertion plates are provided on the peripheral side wall of the upper sound-absorbing chamber 1. The lower sound-absorbing chamber 2 and the upper sound-absorbing chamber 1 are detachably installed; an annular installation groove is provided at the junction of the inner wall of the upper sound-absorbing chamber 1 and the inner wall of the lower sound-absorbing chamber 2, and the peripheral edge of the horizontal partition plate 3 is clamped in the annular installation groove.

[0059] Further, a silencing protrusion 15 is provided on the outer side of the end of the tail pipe portion 603. The interior of the silencing protrusion 15 is provided with an inner cavity channel having a conical structure. The silencing protrusion 15 is located on the side away from the spoiler 12. By arranging the silencing protrusion 15 and the spoiler 12 oppositely and cooperating with each other, when the air flow of the tail pipe portion 603 flows out from the silencing protrusion 15, the end of the tail pipe portion 603 will not be forced to vibrate; by providing the inner cavity channel with a conical structure, the air flow in the tail pipe portion 603 can be discharged more easily, forming a microcirculation with the air flow inhaled at the end, and reducing the air flow vibration noise caused by excessive vacuum force during inhalation.

[0060] Further, the first half pipe 8 is provided with a first step structure along the end face of the pipe wall, and the second half pipe 9 is provided with a second step structure along the end face of the pipe wall. The first half pipe and the second half pipe are clamped by the cooperation and insertion of the first step structure and the second step structure.

[0061] The upper end face of the serpentine communication pipe 6 is provided with a third step structure for cooperating with the upper and lower cavity communication pipe 16, and the third step structure realizes the stable installation of the serpentine communication pipe 6 and the upper and lower cavity communication pipe 16.

[0062] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A serpentine connecting pipe silencer for a refrigerator compressor, characterized in that, it includes an upper silencing chamber and a lower silencing chamber. A horizontal partition is provided between the upper silencing chamber and the lower silencing chamber. An air outlet pipe is connected to the upper side of the upper silencing chamber. An air suction pipe is connected to the outside of the lower silencing chamber. The lower silencing chamber includes a connector assembly. The connector assembly includes a serpentine connecting pipe and a partition plate fixedly connected to the serpentine connecting pipe. The partition plate divides the lower silencing chamber into a left silencing expansion chamber and a right silencing expansion chamber; the serpentine connecting pipe includes a first half pipe and a second half pipe that are split in half. The partition plate includes a first half partition plate and a second half partition plate that are symmetrically separable. The first half pipe is fixedly connected to the first half partition plate, and the second half pipe is fixedly connected to the second half partition plate; strip-shaped installation grooves are symmetrically provided on both side walls of the lower silencing chamber, and both side edges of the partition plate are clamped in the strip-shaped installation grooves; the serpentine connecting pipe includes a U-shaped bent pipe portion, and a neck pipe portion and a tail pipe portion respectively connected to both ends of the U-shaped bent pipe portion. The U-shaped bent pipe portion is located in the left silencing expansion chamber. The U-shaped bent pipe portion is provided with at least a pair of opening slits. The two opening slits are symmetrical to each other and are respectively provided on the first half pipe and the second half pipe; an air inlet communicating with the air suction pipe is provided below one side of the right silencing expansion chamber. A spoiler is provided on the side of the right silencing expansion chamber where the air inlet is located. The spoiler abuts against one side of the end of the tail pipe portion; the port of the tail pipe portion is arranged opposite to the air inlet and there is a gap between them. The port of the tail pipe portion has an inclined angle relative to the air inlet; a silencing protrusion is provided on the outer side of the end of the tail pipe portion. The inner cavity channel of the silencing protrusion has a conical structure. The silencing protrusion is located on the side away from the spoiler.

2. The serpentine connecting pipe silencer for a refrigerator compressor according to claim 1, characterized in that, the horizontal partition is provided with an upper and lower cavity through pipe vertically penetrating through it. The neck pipe portion is connected to the upper and lower cavity through pipe. The bending direction of the neck pipe portion is opposite to the bending direction of the U-shaped bent pipe portion.

3. The serpentine connecting pipe silencer for a refrigerator compressor according to claim 2, characterized in that, the neck pipe portion is located between the left silencing expansion chamber and the right silencing expansion chamber. The neck pipe portion is fixedly connected to the partition plate.

4. The serpentine connecting pipe silencer for a refrigerator compressor according to claim 1, characterized in that, both lower end portions of the first half pipe and the second half pipe are provided with connecting ears. The connecting ear of the first half pipe is provided with a blind hole, and the connecting ear of the second half pipe is provided with a pin inserted into the blind hole.

5. The serpentine connecting pipe silencer for a refrigerator compressor according to claim 1, characterized in that, the bending angle of the U-shaped bent pipe portion is 60° - 150°. One pair of the opening slits is arranged at the middle position of the U-shaped bent pipe portion.

6. The serpentine connecting pipe silencer for a refrigerator compressor according to claim 1, characterized in that, A convex platform is vertically arranged on the upper end surface of the horizontal partition board. The convex platform surrounds the upper port of the serpentine communication pipe. A microporous separator is arranged on the upper side of the convex platform. The peripheral edge of the microporous separator is fixedly connected with the convex platform through a pin.

7. The serpentine communication pipe silencer for a refrigerator compressor according to claim 1, characterized in that, a connecting insertion plate is arranged on the upper peripheral side wall of the lower sound insulation chamber, a connecting slot which is in interference fit with the connecting insertion plate is arranged on the peripheral side wall of the upper sound insulation chamber, and the lower sound insulation chamber and the upper sound insulation chamber are detachably installed; an annular installation groove is arranged at the intersection of the inner walls of the upper sound insulation chamber and the lower sound insulation chamber, and the peripheral edge of the horizontal partition board is clamped in the annular installation groove.

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