An internal exhaust muffler assembly and compressor

Abstract

The application provides an inner exhaust muffler assembly and a compressor, relates to the field of compressors, and aims to solve the problem that the noise elimination effect of the current exhaust muffling structure cannot meet the demand. The buffer muffler is arranged on the inner exhaust pipe, the inner cavity of the buffer muffler combines with the hole plate to depressurize and buffer the input refrigerant, the refrigerant is compressed and discharged after being expanded and depressurized twice in the cavity, the influence of the buffer process on the buffer muffler itself is reduced, the exhaust pulsation is reduced, the inner exhaust pipe vibration is reduced, the noise is reduced from the source, and the demand for operation quietness is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressors, in particular to an internal exhaust muffler assembly and a compressor. BACKGROUND

[0002] The working process of a reciprocating compressor is to realize the reciprocating motion of a piston through a crank connecting rod mechanism driven by a motor, continuously compressing refrigerant in a cylinder cavity, thereby establishing a pressure difference for the entire refrigeration cycle system, and being the core component of the entire refrigeration system. Commercial refrigeration cabinets require low temperature draw depth and high system pressure. For light commercial large reciprocating compressors, the prominent problem is that the exhaust gas flow pulsation of the compressor is large, and when matching the cabinet of the commercial refrigeration cabinet, the cabinet exhaust pipeline vibration and cabinet noise problem are obvious during the operation of the compressor.

[0003] At present, the control of cabinet noise is mostly carried out from the perspective of transmission path: improving the stiffness of the compression spring, reducing the swing of the compressor core, thereby reducing the cabinet noise; the compressor adopts a high-damping damping pad to reduce the noise propagation at the connection between the compressor and the cabinet bottom plate; a buffer structure is added to the connection part between the exhaust side of the compressor and the cabinet pipeline to reduce the pipeline vibration; but the existing technology mainly considers the influence of the transmission path on the cabinet noise, and some technical solutions ignore the noise during the operation of the compressor. The pressure pulsation of the refrigerant is the root cause of pipeline vibration and noise, and there are various exhaust mufflers in the existing technology to reduce pipeline vibration and thus reduce noise generated by the operation of the compressor, but the effect of eliminating vibration and noise is not good. Due to the unreasonable structure of the exhaust muffler, the exhaust muffler itself will generate a large vibration under the action of the refrigerant gas flow, which in turn induces the vibration of the pipeline in the compressor, making it difficult to meet the demand for quiet operation of the commercial refrigeration cabinet. SUMMARY

[0004] The purpose of the present application is to overcome the defects in the prior art, provide an internal exhaust muffler assembly and a compressor, and set a buffer muffler on the internal exhaust pipe. The internal cavity of the buffer muffler combines with the hole plate to reduce the pressure of the input refrigerant, and the refrigerant is compressed and discharged after being expanded and decompressed twice in the cavity, thereby reducing the influence on the buffer muffler during the buffering process, reducing the exhaust pulsation and the vibration of the internal exhaust pipe, reducing the noise from the source, and meeting the demand for quiet operation.

[0005] The first purpose of the present application is to provide an internal exhaust muffler assembly, which adopts the following scheme:

[0006] Comprising:

[0007] The buffer silencer is internally formed with a columnar cavity, a hole plate is arranged in the cavity, the hole plate divides the cavity into a first silencing bag and a second silencing bag which are distributed along the axial direction of the buffer silencer, and the axial length of the first silencing bag is smaller than that of the second silencing bag.

[0008] The inner discharge pipe includes an intake inner discharge pipe and an exhaust inner discharge pipe, and the intake inner discharge pipe and the exhaust inner discharge pipe are respectively communicated with the first silencing bag.

[0009] The part of the refrigerant input into the first silencing bag from the intake inner discharge pipe passes through the hole plate to enter the second silencing bag, is turned back, and is then output to the exhaust inner discharge pipe through the first silencing bag.

[0010] Further, the intake inner discharge pipe is communicated with the first silencing bag through the circumferential side wall of the first silencing bag, and the exhaust inner discharge pipe is communicated with the first silencing bag through the end surface of one end of the buffer silencer.

[0011] Further, the end portions of the intake inner discharge pipe and the exhaust inner discharge pipe that are connected to the first silencing bag are arranged in a staggered manner, and the intake inner discharge pipe and the exhaust inner discharge pipe are arranged in a spaced manner along the axial direction.

[0012] Further, the hole plate is arranged along the radial direction of the cavity, the intake inner discharge pipe is arranged in a spaced manner with the hole plate, and the end of the exhaust inner discharge pipe that is communicated with the first silencing bag is arranged in a spaced manner with the hole plate.

[0013] Further, a plurality of through holes are arranged on the hole plate, and the axis of the end of the exhaust inner discharge pipe that is communicated with the first silencing bag is parallel to or collinear with the axis of the through hole on the hole plate.

[0014] Further, the exhaust inner discharge pipe is a multi-segment bent pipe, and the end that is away from the first silencing bag is connected to the outer discharge pipe.

[0015] Further, a damping spring is arranged on the outer sleeve of the middle segment region of the exhaust inner discharge pipe along the axial path of the exhaust inner discharge pipe.

[0016] Further, the end of the intake inner discharge pipe that is away from the first silencing bag is connected with an exhaust silencing cover, and the exhaust silencing cover is connected to the second-order exhaust silencing cavity in a butt joint manner.

[0017] The second object of the present application is to provide a compressor using the inner exhaust silencer assembly as described in the first object.

[0018] Further, the compressor core is further provided, the intake inner discharge pipe is communicated with the second-order exhaust silencing cavity, the exhaust inner discharge pipe is communicated with the outer discharge pipe, and the inner discharge pipe suspends and supports the buffer silencer in the compressor core.

[0019] Compared with the prior art, the present application has the advantages and positive effects that:

[0020] (1) In order to solve the problem that the noise elimination effect of the current exhaust silencing structure cannot meet the demand, a buffer silencer is arranged on the inner exhaust pipe, the input refrigerant is depressurized and buffered by the hole plate in the internal cavity of the buffer silencer, the refrigerant is compressed and discharged after two-step expansion and depressurization by turning back in the cavity, the influence on the buffer silencer itself in the buffering process is reduced, the exhaust pulsation is reduced, thereby reducing the vibration of the inner exhaust pipe, reducing the noise from the source, and meeting the demand for quiet operation.

[0021] (2) The internal cavity of the buffer silencer is a cylindrical cavity, the axial lengths of the first silencing pack and the second silencing pack are different, so that the volumes of the first silencing pack and the second silencing pack are different, the first expansion and depressurization is realized when the refrigerant is input into the first silencing pack, part of the refrigerant in the first silencing pack passes through the hole plate to enter the second silencing pack to realize the second expansion and depressurization, and the required two-step depressurization and expansion is realized, thereby reducing the vibration of the buffer silencer caused by the sudden change.

[0022] (3) The volume of the first silencing pack is smaller than that of the second silencing pack, the refrigerant input into the second silencing pack passes through the hole plate to enter the first silencing pack to realize the first shrinkage and pressure increase, the refrigerant in the first silencing pack is input into the exhaust inner exhaust pipe to realize the second shrinkage and pressure increase, and the required two-step pressure increase and shrinkage is realized, thereby reducing the vibration problem caused by the too large sudden change.

[0023] (4) The buffer silencer is arranged in the inner exhaust pipe of the compressor, and the hole plate is arranged in the buffer silencer as an exhaust baffle, so that the pressure of the inner exhaust pipe is rapidly increased due to the rapid flow of the refrigerant during the compression of the exhaust, and the buffer and noise reduction effects are realized.

[0024] (5) The middle section of the inner exhaust pipe is provided with a damping spring, the vibration of the weak middle section of the suspended inner exhaust pipe is suppressed, the high-frequency vibration transmitted by the core of the compressor is destroyed, so that the vibration of the inner exhaust pipe is reduced; at the same time, the vibration and silencing effects of the exhaust silencer body are combined, and the vibration and noise of the box caused by the airflow pulsation of the compressor are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not constitute an improper limitation on the application.

[0026] Figure 1 The structure schematic view of the inner exhaust silencer assembly in the embodiments 1 and 2 of the application is installed in the compressor.

[0027] Figure 2 The structure schematic view of the inner exhaust silencer assembly in the embodiments 1 and 2 of the application is installed in the compressor.

[0028] Figure 3 Structure diagram of the buffer muffler in the embodiments 1 and 2 of the present application.

[0029] Wherein, 1. Cylinder, 2. Compressor core, 3. Second-order exhaust muffling cavity, 4. Inner exhaust muffler assembly, 5. Outer exhaust pipe, 6. First muffling bag, 7. Second muffling bag, 8. Damping spring, 9. Orifice plate, 41. Exhaust muffling cover, 42. Intake inner exhaust pipe, 43. Exhaust inner exhaust pipe, 91. Through hole. DETAILED DESCRIPTION

[0030] Embodiment 1

[0031] In a typical embodiment of the present application, as shown in Figures 1-3 , an inner exhaust muffler assembly is given.

[0032] There are various means for improving the cabinet noise of a commercial refrigerator, using the technology of optimizing the stiffness of compression spring, the resonance frequency of the compressor is moved up, although the overall vibration of the compressor core can be reduced, the overall peak noise will be highlighted, and the ear discomfort will be more obvious; using high-damping damping pad technology, although the vibration of the compressor and the bottom plate of the cabinet can be effectively reduced, it has no effect on the airflow excitation noise of the compressor and the pipeline part; using the technology of adding a buffer structure to the cabinet pipeline, the noise impact of the narrow pipeline on the cabinet during the exhaust of the compressor can be reduced, and the cabinet noise can be improved to a certain extent, but it has no effect on the noise generation, and the cost will be significantly increased.

[0033] Based on this, the present embodiment provides an inner exhaust muffler assembly 4, which improves the noise source, and reduces the rapid pressure rise of the inner exhaust pipe of the compressor during the compression and exhaust process by adding a buffer muffler to the inner exhaust pipe of the compressor and adding an orifice plate 9 as an exhaust baffle plate in the buffer muffler, thereby playing a buffering and noise reduction role.

[0034] Next, the inner exhaust muffler assembly 4 will be described in detail in combination with the drawings.

[0035] Referring to Figure 1 , the inner exhaust muffler assembly 4 mainly includes an inner exhaust pipe and a buffer muffler, the buffer muffler is connected to the inner exhaust pipe and installed on the compressor core 2 through the inner exhaust pipe, the buffer muffler is supported by the inner exhaust pipe and is in a suspended state, the inner exhaust pipe inputs the obtained refrigerant to the buffer muffler for buffering and noise reduction and then outputs it to the outer exhaust pipe 5, thereby reducing the vibration noise of the inner exhaust pipe itself.

[0036] Compressor gas flow pulsation, especially exhaust pulsation, is the main source of noise in the operation of refrigeration equipment such as commercial refrigeration cabinets. The exhaust process of the compressor is to output the compressed refrigerant in the cylinder 1 of the compressor core 2 to the second-order exhaust muffling cavity 3 of the cylinder seat, and then input into the buffer muffler through the inner exhaust pipe segment. The refrigerant output by the buffer muffler is output to the outer exhaust pipe 5 through another segment of the inner exhaust pipe segment.

[0037] Among them, the buffer muffler is a shell structure, and a cylindrical cavity is arranged inside. A perforated plate 9 is arranged in the cavity as an exhaust baffle. Along the axial direction of the buffer muffler, the perforated plate 9 separates the cavity into a first sound-absorbing package 6 and a second sound-absorbing package 7. It can be understood that the first sound-absorbing package 6 and the second sound-absorbing package 7 are also connected through the through holes 91 of the perforated plate 9. The first sound-absorbing package 6 corresponds to the first sound-absorbing cavity, and the second sound-absorbing package 7 corresponds to the second sound-absorbing cavity. The axial length of the first sound-absorbing package 6 is less than that of the second sound-absorbing package 7.

[0038] The cross section of the cylindrical cavity is the same. Therefore, after the axial length difference of the first sound-absorbing package 6 and the second sound-absorbing package 7 is arranged, the volume corresponding to the first sound-absorbing package 6 and the volume corresponding to the second sound-absorbing package 7 are arranged differently.

[0039] Combining Figure 2 and Figure 3 , the inner exhaust pipe includes an intake inner exhaust pipe 42 and an exhaust inner exhaust pipe 43, and the intake inner exhaust pipe 42 and the exhaust inner exhaust pipe 43 are respectively connected to the first sound-absorbing package 6. Part of the refrigerant input into the first sound-absorbing package 6 passes through the perforated plate 9 into the second sound-absorbing package 7, and then is output to the exhaust inner exhaust pipe through the first sound-absorbing package 6.

[0040] It should be particularly pointed out that the volume of the first sound-absorbing package 6 is less than that of the second sound-absorbing package 7. When the refrigerant is input into the first sound-absorbing package 6, the first expansion and pressure reduction are realized. Part of the refrigerant in the first sound-absorbing package 6 passes through the perforated plate 9 into the second sound-absorbing package 7 to realize the second expansion and pressure reduction, so that the required two-step pressure reduction and expansion are realized, and the vibration caused by the sudden change is reduced.

[0041] At the same time, in addition to the two-stage pressure reduction and expansion effect realized when the refrigerant enters the buffer muffler, a two-stage condensation and pressure increase effect can also be realized when the refrigerant is discharged from the buffer muffler. The volume of the first sound-absorbing package 6 is less than that of the second sound-absorbing package 7. After the refrigerant input into the second sound-absorbing package 7 is folded back, it passes through the perforated plate 9 into the first sound-absorbing package 6 to realize the first condensation and pressure increase. The refrigerant in the first sound-absorbing package 6 is input into the exhaust inner exhaust pipe 43 to realize the second condensation and pressure increase, so that the required two-step pressure increase and condensation are realized, and the vibration problem caused by the too large mutation degree is reduced.

[0042] In order to reduce the mutual influence between the refrigerant of the input buffer silencer and the refrigerant of the output buffer silencer, the inlet inner exhaust pipe 42 and the exhaust inner exhaust pipe 43 are arranged in a staggered manner, avoiding coaxial arrangement at the communication position of the two, so that the refrigerant of the first silencing bag 6 of the input buffer silencer tends to expand in the second silencing bag 7, achieving good expansion and pressure reduction effect, weakening the exhaust pulsation and thus reducing the noise.

[0043] In this embodiment, as shown in Figure 3 The inlet inner exhaust pipe 42 communicates with the first silencing bag 6 through the circumferential side wall of the first silencing bag 6, and the exhaust inner exhaust pipe 43 communicates with the first silencing bag 6 through the end face of one end of the buffer silencer; and the inlet inner exhaust pipe 42 and the exhaust inner exhaust pipe 43 are arranged in an axial direction.

[0044] Specifically, the axis of the port where the inlet inner exhaust pipe 42 communicates with the first silencing bag 6 is distributed along the radial direction of the first silencing bag 6, and the axis of the port where the inlet outer exhaust pipe 5 communicates with the first silencing bag 6 is arranged along the axial direction of the first silencing bag 6, and the inlet inner exhaust pipe 42 and the exhaust inner exhaust pipe 43 both extend into the first silencing bag 6 by a certain length, such as 5mm, 3mm, etc., facilitating adjustment of the airflow field in the first silencing bag 6 and promoting expansion and contraction.

[0045] The airflow direction of the refrigerant entering the first silencing bag 6 is inconsistent with the exhaust direction, so that part of the refrigerant entering the first silencing bag 6 can pass through the hole plate 9 into the second silencing bag 7 for expansion and pressure reduction, noise reduction, and reducing the amount of refrigerant directly entering the exhaust inner exhaust pipe 43 without expansion and secondary expansion.

[0046] For the structure of the buffer silencer, the whole is in a capsule shape, the hole plate 9 is arranged along the radial direction of the cavity, the inlet inner exhaust pipe 42 is arranged in a spaced manner with the hole plate 9, and the exhaust inner exhaust pipe 43 is arranged in a spaced manner with the hole plate 9 towards the hole plate 9.

[0047] The hole plate 9 serves as an exhaust baffle plate, part of the refrigerant entering the first silencing bag 6 will pass through the hole plate 9 into the second silencing bag 7, and the expanded refrigerant in the second silencing bag 7 will also pass through the hole plate 9 to return to the first silencing bag 6, therefore, the hole plate 9 is provided with through holes 91 as needed, and the through holes 91 can be used as air holes for the refrigerant to pass through.

[0048] The hole plate 9 is provided with a plurality of through holes 91, and the axis of the end of the exhaust inner exhaust pipe 43 towards the hole plate 9 is parallel or collinear with the axis of the through holes 91 on the hole plate 9, facilitating the exhaust of the refrigerant from the first silencing bag 6 to the downstream outer exhaust pipe 5.

[0049] In combination with Figure 1 and Figure 2The exhaust inner exhaust pipe 43 is a multi-section bending pipe, one end away from the first sound attenuation package 6 is connected to the outer exhaust pipe 5, and the damping spring 8 is sleeved outside along the axis path of the exhaust inner exhaust pipe 43 close to the middle section area of the exhaust inner exhaust pipe 43. The damping spring 8 can be provided in multiple, for example, two damping springs are provided on both sides of the middle position of the exhaust inner exhaust pipe 43. The size, material and other parameters of the damping spring 8 can be set according to requirements, so that the damping spring 8 can be kept in the set position and play a good damping effect.

[0050] It should be pointed out that the damping spring 8 is arranged at the middle section of the inner exhaust pipe, which can suppress the vibration of the weak middle section of the suspended inner exhaust pipe, and can destroy the high-frequency vibration transmitted by the compressor core 2, so as to reduce the vibration of the inner exhaust pipe; at the same time, in combination with the damping and sound attenuation effect of the exhaust silencer body, the vibration of the box caused by the compressor airflow pulsation is reduced.

[0051] The inner exhaust pipe is profiled according to the structure of the compressor core 2, so that the bending part is reasonably arranged, and the bending is smooth without sharp corners. At the same time, the damping spring 8 is arranged at the gently bending part of the inner exhaust pipe, so as to slow down the vibration of the inner exhaust pipe.

[0052] In addition, for other accessories, the exhaust inner exhaust pipe 43 is connected with the exhaust silencer cover 41 away from the first sound attenuation package 6, and the exhaust silencer cover 41 is connected to the external second-order exhaust silencer cavity 3. The exhaust silencer cover 41 is selected from existing standard parts.

[0053] By arranging the buffer silencer on the inner exhaust pipe, the internal cavity of the buffer silencer combines the orifice plate 9 to reduce the pressure of the input refrigerant, and the refrigerant is compressed and discharged after two-step expansion and pressure reduction in the cavity, so as to reduce the influence of the buffer process on the buffer silencer itself, reduce the exhaust pulsation, reduce the vibration of the inner exhaust pipe, reduce the noise from the source, and meet the demand for quiet operation.

[0054] Embodiment 2

[0055] In another typical embodiment of the present application, as shown in Figures 1-3 a compressor using the inner exhaust silencer assembly 4 is given.

[0056] The compressor uses the inner exhaust silencer assembly 4 as in embodiment 1, and further comprises a compressor core 2, an exhaust inner exhaust pipe 43 connected to the second-order exhaust silencer cavity 3, and an exhaust inner exhaust pipe 43 connected to the outer exhaust pipe 5. The inner exhaust pipe supports the buffer silencer in the compressor core 2.

[0057] As shown in Figure 1As shown, the exhaust process of the compressor is to output the compressed refrigerant in the cylinder 1 of the compressor core 2 to the second-order exhaust muffling cavity 3 of the cylinder base, and then input the buffer muffler through the inner exhaust pipe segment. The refrigerant output by the buffer muffler is output to the outer exhaust pipe 5 through another segment of the inner exhaust pipe segment.

[0058] It can be understood that, due to the installation of the inner exhaust muffler assembly 4 on the compressor as in Embodiment 1, the beneficial effects brought by the inner exhaust muffler assembly 4 are described in Embodiment 1, which will not be repeated here.

[0059] For other structures in the compressor not mentioned, the existing structures can be adopted.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An internal exhaust muffler assembly characterized by, The application relates to a buffer silencer, which comprises a cylindrical cavity formed inside the buffer silencer, a perforated plate arranged in the cavity, the perforated plate separating the cavity into a first silencing bag and a second silencing bag distributed along the axial direction of the buffer silencer, and the axial length of the first silencing bag being smaller than that of the second silencing bag. The buffer silencer further comprises an inner discharge pipe, which comprises an air inlet inner discharge pipe and an air outlet inner discharge pipe, and the air inlet inner discharge pipe and the air outlet inner discharge pipe are connected with the first silencing bag. The part of the refrigerant input into the first silencing bag through the air inlet inner discharge pipe passes through the perforated plate into the second silencing bag, is folded back, and is then output to the air outlet inner discharge pipe through the first silencing bag. The perforated plate is arranged along the radial direction of the cavity, the air inlet inner discharge pipe is arranged at intervals with the perforated plate, and one end of the air outlet inner discharge pipe connected with the first silencing bag is arranged at intervals with the perforated plate and faces the perforated plate. A plurality of through holes are arranged on the perforated plate, and the axis of the one end of the air outlet inner discharge pipe facing the perforated plate is parallel to or collinear with the axis of the through holes on the perforated plate. A damping spring is arranged on the outer sleeve of the middle section area of the air outlet inner discharge pipe along the axial direction of the air outlet inner discharge pipe. The air inlet inner discharge pipe is connected with the first silencing bag through the circumferential side wall of the first silencing bag, and the air outlet inner discharge pipe is connected with the first silencing bag through the end face of one end of the buffer silencer.

2. The internal exhaust muffler assembly of claim 1, wherein, The end parts of the air inlet inner discharge pipe and the air outlet inner discharge pipe connected with the first silencing bag are arranged at intervals, and the air inlet inner discharge pipe and the air outlet inner discharge pipe are arranged at intervals along the axial direction.

3. The internal exhaust muffler assembly of claim 2, wherein, The air outlet inner discharge pipe is a multi-section bent pipe, and one end of the air outlet inner discharge pipe far from the first silencing bag is connected with an outer discharge pipe.

4. The internal exhaust muffler assembly of claim 1, wherein, The air inlet inner discharge pipe is connected with an air outlet silencing cover far from the first silencing bag, and the air outlet silencing cover is connected with a second-order air outlet silencing cavity.

5. The internal exhaust muffler assembly of claim 1, wherein, The application further relates to a compressor core, and the air inlet inner discharge pipe is connected with the second-order air outlet silencing cavity, the air outlet inner discharge pipe is connected with the outer discharge pipe, and the inner discharge pipe suspends and supports the buffer silencer in the compressor core.

6. A compressor characterized by, The application relates to a buffer silencer, which comprises a cylindrical cavity formed inside the buffer silencer, a perforated plate arranged in the cavity, the perforated plate separating the cavity into a first silencing bag and a second silencing bag distributed along the axial direction of the buffer silencer, and the axial length of the first silencing bag being smaller than that of the second silencing bag.

7. The compressor of claim 6, wherein, ​

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