Muffler and refrigeration system having the same

Abstract

The present application provides a muffler, which includes a cylindrical shell defining a muffler chamber, a muffler chamber inlet and a muffler chamber outlet located at two opposite axial ends of the shell, at least one partition located in the muffler chamber, at least one muffler pipe and at least one drain pipe. At least one drain pipe is respectively arranged on at least one partition and extends a certain distance along the axis of the shell on at least one side of the corresponding partition. Each drain pipe defines a drainage channel that passes through the corresponding partition. Each drain pipe is arranged close to the shell or is partially formed by the shell. The position of the muffler chamber outlet relative to the at least one drain pipe is set so that the liquid flowing out of the at least one drain pipe can be discharged through the muffler chamber outlet. The muffler of the present application constitutes a part of the compressor exhaust channel, and the drainage channel arranged in the muffler chamber can meet the demand of timely discharging the lubricating liquid from the muffler, and at the same time will not reduce the muffler effect of the muffler.

Description

Technical Field

[0001] The present application relates to a muffler, and more particularly to a muffler for a refrigeration system, and a refrigeration system having the muffler. Background Art

[0002] A muffler is usually used on the exhaust flow channel of the compressor of the refrigeration system to reduce the noise generated by the refrigerant. The muffler constitutes one section of the exhaust flow channel, and the refrigerant flows through the muffler to achieve a silencing effect. The refrigerant circulating in the refrigeration system contains lubricating liquid. For screw refrigeration systems, especially screw units used for industrial refrigeration, the circulation volume of the lubricating liquid is often tens of tons per hour, which is two orders of magnitude higher than the oil circulation volume of general air-conditioning refrigeration units. The lubricating liquid will enter the muffler together with the refrigerant. If the amount of lubricating liquid discharged from the muffler per unit time is less than the circulation volume of the lubricating liquid when the refrigeration system is running, the lubricating liquid will accumulate in the muffler, causing a change in the volume of the muffler, thereby reducing the silencing effect. Summary of the invention

[0003] According to a first aspect of the present application, the present application provides a muffler, which includes a cylindrical shell defining a muffler chamber, a muffler chamber inlet and a muffler chamber outlet located at two opposite axial ends of the shell, at least one partition located in the muffler chamber, at least one muffler pipe and at least one drainage pipe. The shell has an axis. Each partition is arranged substantially perpendicular to the axis of the shell and divides the muffler chamber into at least two compartments. The at least one muffler pipe is respectively arranged on the at least one partition and extends a certain distance along the axis on at least one side of the corresponding partition. Each muffler pipe defines a travel channel, which passes through the corresponding partition. The at least one drainage pipe is respectively arranged on the at least one partition and extends a certain distance along the axis on at least one side of the corresponding partition. Each drainage pipe defines a drainage channel, which passes through the corresponding partition. Each drainage pipe is arranged close to the shell or is partially formed by the shell. The position of the muffler chamber outlet relative to the at least one drainage pipe is set so that the liquid flowing out of the at least one drainage pipe can be discharged through the muffler chamber outlet.

[0004] According to the muffler of the first aspect, each of the drainage pipes extends a certain distance along the axis on the side of the corresponding partition located downstream in the drainage direction. When the muffler is in use, the axis of the shell is arranged horizontally relative to the horizontal plane, the at least one drainage pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the at least one drainage pipe at the bottom of the muffler chamber. Alternatively, when the muffler is in use, the axis of the shell is arranged tilted relative to the horizontal plane.

[0005] According to the muffler of the first aspect, each of the drainage pipes extends a certain distance along the axis on one side of the corresponding partition located upstream in the drainage direction, or each of the drainage pipes extends a certain distance along the axis on both opposite sides of the corresponding partition located upstream and downstream in the drainage direction. When the muffler is in use, the axis of the shell is arranged horizontally relative to a horizontal plane, the at least one drainage pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the at least one drainage pipe at the bottom of the muffler chamber.

[0006] According to the muffler of the first aspect above, the total cross-section of the drainage channel defined by the drain pipe on each partition is determined by the circulation amount of the lubricating liquid during the operation of the unit, which is 0.1%-30% of the cross-section of the corresponding partition, so as to discharge the liquid lubricating fluid circulating in the system in real time.

[0007] According to the muffler of the above-mentioned first aspect, each of the drain pipes comprises a single pipe.

[0008] According to the muffler of the first aspect, a portion of the single pipe along the circumferential direction is formed by the shell, and another portion is formed by an additional wall, wherein the cross-sectional shape of the liquid discharge pipe is non-circular. Alternatively, the single pipe is formed by a pipe with a circular cross-sectional shape.

[0009] According to the muffler of the first aspect, each of the liquid discharge pipes includes a pipe bundle formed of a plurality of sub-pipes, and each of the sub-pipes in the pipe bundle is configured to have the same or different lengths.

[0010] According to the muffler of the first aspect, the liquid discharge pipe is connected to or separated from the muffler pipe on the corresponding partition plate in the radial direction.

[0011] According to the muffler of the first aspect, when the muffler is arranged horizontally relative to a horizontal plane during use, the muffler chamber inlet, the muffler chamber outlet and the at least one drain pipe are aligned at the bottom of the muffler chamber.

[0012] According to the muffler of the first aspect described above, the distance by which each of the drain pipes extends on one side of the corresponding partition plate is determined according to the wavelength of the sound wave to be eliminated.

[0013] According to a second aspect of the present application, the present application provides a muffler, which includes a cylindrical shell defining a muffler chamber, an upstream end plate and a downstream end plate that respectively close the two axial ends of the shell, a muffler chamber inlet and a muffler chamber outlet that are respectively arranged on the upstream end plate and the downstream end plate, a muffler pipe located in the muffler chamber, and a drainage pipe located in the muffler chamber. The shell has an axis. The first axial end of the muffler pipe is connected to the muffler chamber inlet, the second axial end of the muffler pipe is closed by the downstream end plate, and the muffler pipe has a plurality of muffler pipe connecting holes arranged through its pipe wall to connect the muffler chamber with the space inside the muffler pipe. The first axial end of the drainage pipe is closed by the upstream end plate, the second axial end of the muffler pipe is connected to the muffler chamber outlet, and the drainage pipeline has a plurality of drainage pipe connecting holes arranged through its pipe wall to connect the muffler chamber with the space inside the drainage pipe. The drainage pipe is arranged close to the shell or partially formed by the shell.

[0014] According to the muffler of the second aspect, the muffler chamber outlet is aligned with the drain pipe in the axial direction.

[0015] According to a third aspect of the present application, the present application provides a muffler, which comprises: a cylindrical shell defining a muffler chamber, a muffler chamber inlet and a muffler chamber outlet located at two opposite axial ends of the shell, at least one partition located in the muffler chamber, at least one muffler pipe and a drainage pipe. The shell has an axis. Each partition is arranged substantially perpendicular to the axis of the shell and divides the muffler chamber into at least two compartments. The at least one muffler pipe is respectively arranged on the at least one partition and extends a certain distance along the axis on at least one side of the corresponding partition, and each muffler pipe defines a travel channel, which passes through the corresponding partition. The drainage pipe connects two adjacent partitions, and the drainage pipe defines a drainage channel, which passes through the two adjacent partitions; or the drainage pipe is arranged on the partition adjacent to the muffler chamber outlet and connects the partition adjacent to the muffler chamber outlet and the muffler chamber outlet, and the drainage pipe defines a drainage channel, which passes through the partition adjacent to the muffler chamber outlet. The drain pipe is arranged close to the shell or is partially formed by the shell, and the outlet of the muffler chamber is aligned with the drain pipe along the axial direction. The drain pipe is provided with a plurality of communication holes to connect the inner space of the drain pipe with the compartment where the drain pipe is located.

[0016] According to the muffler of the third aspect above, when the muffler is in use, the axis of the shell is arranged horizontally relative to the horizontal plane, the drain pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the drain pipe at the bottom of the muffler chamber; or when the muffler is in use, the axis of the shell is arranged obliquely relative to the horizontal plane.

[0017] According to the silencer of the third aspect above, the total cross-section of the drainage channel defined by the drainage pipe on each partition is determined by the circulation volume of the lubricating liquid during the operation of the unit, which is 0.1%-30% of the cross-section of the corresponding partition, so as to discharge the lubricating liquid circulating in the system in real time.

[0018] According to the muffler of the third aspect, a portion of the drain pipe along the circumferential direction is formed by the shell, and another portion is formed by an additional wall, wherein the cross-sectional shape of the drain pipe is non-circular; the drain pipe is formed by a pipe with a circular cross-section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A is a perspective view of a first embodiment of a first type of embodiment of a muffler according to the present application;

[0020] Figure 1B yes Figure 1A a perspective cutaway view of the muffler shown;

[0021] Figure 1C yes Figure 1A A left side view of the muffler is shown;

[0022] Figure 2A is a front cross-sectional view of a second embodiment of the first type of embodiment of the muffler according to the present application;

[0023] Figure 2B is a front cross-sectional view of a third embodiment of the first type of embodiment of the muffler according to the present application;

[0024] Figure 2C is a perspective cross-sectional view of a fourth embodiment of the first type of embodiment of the muffler according to the present application;

[0025] Figure 3A is a schematic diagram of a first embodiment of the cross-sectional shape of a liquid discharge passage of a muffler according to the present application;

[0026] Figure 3B is a schematic diagram of a second embodiment of the cross-sectional shape of the discharge channel of the muffler according to the present application;

[0027] Figure 3C is a schematic diagram of a third embodiment of the cross-sectional shape of the discharge channel of the muffler according to the present application;

[0028] Figure 4A is a perspective cross-sectional view of a fifth embodiment of the first type of embodiment of the muffler according to the present application;

[0029] Figure 4B yes Figure 4A A left side view of the muffler is shown;

[0030] Figure 5A is a perspective cross-sectional view of a sixth embodiment of the first type of embodiment of the muffler according to the present application;

[0031] Figure 5B yes Figure 5A A left side view of the muffler is shown;

[0032] Fig. 6A is a perspective view of a first embodiment of the second type of embodiment of the muffler according to the present application;

[0033] Figure 6B yes Figure 1A An axial cross-sectional view of the muffler shown;

[0034] Fig. 7A is a perspective view of a second embodiment of the second type of embodiment of the muffler of the present application;

[0035] Figure 7B is a perspective view of a third embodiment of the second type of embodiment of the muffler of the present application;

[0036] Figure 7C is an axial cross-sectional view of a fourth embodiment of the second type of embodiment of the muffler of the present application;

[0037] Fig.7D is an axial cross-sectional view of a fifth embodiment of the second type of embodiment of the muffler of the present application;

[0038] Fig. 8A is a perspective view of a third embodiment of a muffler according to the present application;

[0039] Figure 8B yes Fig. 8A An axial cross-sectional view of the muffler shown;

[0040] Fig. 9 is a schematic diagram of a refrigeration system using a muffler according to the present application. DETAILED DESCRIPTION

[0041] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0042] The present application provides an improved muffler suitable for the compressor exhaust passage of a refrigeration system. In the exhaust passage of the compressor, the refrigerant, which is mostly in a gaseous state, is mixed with a lubricating liquid. Due to its weight, the lubricating liquid will gather at the bottom of the compressor exhaust passage when in use. The muffler according to the present application constitutes a part of the compressor exhaust passage, and a drainage channel is arranged in the muffler chamber. The formation of the drainage channel can not only meet the demand of timely discharge of the lubricating liquid from the muffler, but also will not reduce the muffler effect of the muffler chamber. The muffler of the present application includes three types. The first type of muffler is an internal tube type muffler, the second type of muffler is an expansion chamber type muffler, and the third type of muffler is a porous resonance chamber type muffler.

[0043] Figure 1A-Figure 1C The specific structure of the muffler 100 according to the first embodiment of the first class of embodiments of the present application is shown. The first class of embodiments relates to an inner tube type muffler, the shell of which is formed by, for example, a part of the existing exhaust passage of the compressor, and its outer diameter is substantially the same as the outer diameter of the rest of the exhaust passage of the compressor. Figure 1A shows a perspective view of a muffler 100, Figure 1B 1 shows a perspective cross-sectional view of the muffler 100 cut along a plane passing through the axis, Figure 1C A left side view of the muffler 100 is shown.

[0044] like Figure 1A-Figure 1C As shown, the muffler 100 includes a cylindrical shell 101, the shell 101 has an axis X1, and defines a muffler chamber 102. The muffler 100 also includes a muffler chamber inlet 103 and a muffler chamber outlet 104 respectively located at two opposite axial ends of the shell 101. The muffler chamber inlet 103 and the muffler chamber outlet 104 are connected to the muffler chamber 102, so that the fluid can enter the muffler chamber 102 through the muffler chamber inlet 103 and discharge the muffler chamber 102 through the muffler chamber outlet 104 after muffler. And the dimensions of the muffler chamber inlet 103 and the muffler chamber outlet 104 are the same as the radial dimensions of the muffler chamber 102. That is, the fluid flows in the muffler 100 along the radial direction. Figure 1A The muffler 100 further includes two partitions located in the muffler chamber 102, namely a first partition 113 and a second partition 114, which are arranged substantially perpendicular to the axis X1 and cooperate with the shell 101 to divide the muffler chamber 102 into three compartments, namely a first compartment 107, a second compartment 108 and a third compartment 109.

[0045] Still like Figure 1A-Figure 1CAs shown, the muffler 100 includes two muffler pipes, namely a first muffler pipe 115 and a second muffler pipe 116, which are respectively arranged on the first partition 113 and the second partition 114, and penetrate the corresponding partition and extend a certain distance along the axis X1 on both sides of the corresponding partition. The distance that the muffler pipe extends on one side of the corresponding partition is determined according to the specific wavelength of the sound wave to be attenuated, and the distance extended on both sides of the partition can be used to attenuate the sound wave. The first muffler pipe 115 and the second muffler pipe 116 both define a fluid travel channel T, which penetrates the corresponding partition, and the fluid passes through the partition via the travel channel T and reaches the muffler chamber outlet 104 from the muffler chamber inlet 103. In some other embodiments, the muffler pipe may also extend only on one side of the corresponding partition, and it is only necessary for the travel channel T to penetrate the partition.

[0046] The muffler 100 further includes two drain pipes, namely a first drain pipe 117 and a second drain pipe 118, which are respectively arranged on the first partition 113 and the second partition 114, and extend a certain distance on one side of the corresponding partition (i.e., the side close to the muffler chamber outlet 104 and located downstream in the discharge direction, hereinafter referred to as the "downstream side"). The distance that the first drain pipe 117 / the second drain pipe 118 extends on the downstream side of its corresponding partition is determined according to the specific wavelength of the sound wave to be attenuated. The first drain pipe 117 and the second drain pipe 118 both define a drainage channel P, which runs through the corresponding partition. The cross-sectional shape and size of the portion of the drainage channel P on the first partition 113 are substantially the same as the cross-sectional shape and size of the portion in the first drainage pipe 117, wherein the portion of the drainage channel P on the first partition 113 can be formed by opening a hole in the first partition 113 and connecting the opening with the first drainage pipe 117, or by passing the first drainage pipe 117 through the first partition 113. Similarly, the cross-sectional shape and size of the portion of the drainage channel P on the second partition 114 are substantially the same as the cross-sectional shape and size of the portion in the second drainage pipe 118, wherein the portion of the drainage channel P on the second partition 114 can be formed by opening a hole in the second partition 114 and connecting the opening with the second drainage pipe 118, or by passing the second drainage pipe 118 through the second partition 114.

[0047] In the illustrated embodiment, the first drain pipe 117 and the second drain pipe 118 are formed by a tubular structure formed by the additional walls formed by the arc-shaped sheets 111 and 112 and the housing 101, and the cross section thereof is substantially semicircular. In some other embodiments, the first drain pipe 117 and the second drain pipe 118 can also be formed by a complete tubular object (for example, Figure 3AThe cross-section of the pipe in the embodiment shown is circular, and does not need to be formed by the housing 101, and the complete tubular object is arranged closely against the housing 101.

[0048] like Figure 1B As shown, the first drain pipe 117 is located in the second compartment 108, and its upstream end is connected to the first partition 113, and is in fluid communication with the second compartment 108 through its downstream end. In other words, the downstream end of the first drain pipe 117 is separated from the second partition 114 and does not extend to the second partition 114. The second drain pipe 118 is located in the third compartment 109, and its upstream end is connected to the second partition 114, and its downstream end is separated from the muffler chamber outlet 104 by a certain distance, so the second drain pipe 118 is in fluid communication with the third compartment 109 through its downstream end. Since the muffler chamber outlet 104 of the first type of embodiment is formed by the opening at the axial end of its shell 101, the size of the muffler chamber outlet 104 is much larger than the size of the cross-section of the drainage channel P defined by the first drainage pipe 117 and the second drainage pipe 118. Therefore, the muffler chamber outlet 104 is axially aligned with the first drainage pipe 117 and the second drainage pipe 118, and the muffler chamber outlet 104 is located on the axially extending path of the drainage channel P defined by the first drainage pipe 117 and the second drainage pipe 118. Therefore, the lubricating liquid discharged from the drainage channel P can be discharged from the muffler 100 via the muffler chamber outlet 104.

[0049] Figure 1A-Figure 1C The muffler 100 shown is not only applicable to the case where the muffler 100 is placed horizontally in the use state (i.e., the axis X1 is arranged horizontally relative to the horizontal plane), but also applicable to the case where the muffler is placed obliquely in the use state (i.e., the axis X1 is arranged at an angle to the horizontal plane). When the muffler 100 is placed horizontally in the use state, the first drain pipe 117 and the second drain pipe 118 are located at the bottom of the muffler 100, so the lubricating liquid gathered at the bottom of the muffler 100 can be discharged from the muffler through the drain channel P defined by the first drain pipe 117 and the second drain pipe 118. When the muffler is placed obliquely in the use state, the lubricating liquid first gathers on the first partition 113 and the second partition 114, and then is discharged from the muffler 100 through the drain channel P. The cross section of the drain channel P defined by the drain pipe connected to each partition is determined by the circulation amount of the lubricating liquid in the operation of the refrigeration system (or unit), which is 0.1%-30% of the cross section of the corresponding partition, so as to discharge the lubricating liquid circulating in the system in real time.

[0050] After the fluid to be silenced (generally a gaseous refrigerant) enters the silencing chamber 102 from the silencing chamber inlet 103, the first baffle 113 and the second baffle 114 can block the fluid from flowing through the first baffle 113 and the second baffle 114 from parts other than the travel channel T and the drainage channel P. The gaseous refrigerant mainly flows through the first baffle 113 and the second baffle 114 through the travel channel T, and a small amount of gaseous refrigerant will flow through the first baffle 113 and the second baffle 114 from the drainage channel P together with the lubricating liquid mixed in the gaseous refrigerant. Due to the obstruction of the partition, the incident sound wave of the fluid (along the X1 axis direction) is reflected after hitting the partition to form a reflected sound wave. The direction of the reflected sound wave is also along the X1 axis direction, but opposite to the direction of the incident sound wave. In this process, there is a phase difference between the reflected sound wave and the incident sound wave, which enables the reflected sound wave to interfere with and cancel the incident sound wave that enters the travel channel T later, thereby producing a sound-absorbing effect. The length of the first muffler 115 and the second muffler 116 determines the wavelength of the sound wave that can be eliminated. In other words, by setting the length of the first muffler 115 and the second muffler 116, sound waves of a specific wavelength can be eliminated, and the first muffler 115 and the second muffler 116 can be used to eliminate sound waves of different wavelengths, and even the different lengths of each muffler extending on both sides of the corresponding partition can also be used to eliminate sound waves of different wavelengths. Similarly, the first drainage pipe 117 and the second drainage pipe 118 can also be used to eliminate sound waves of specific wavelengths.

[0051] The muffler 100 of the present application is provided with a drain pipe having a certain extension length, and the cross-sectional size of the drain channel P on the partition can be set larger, so as to meet the demand of the refrigeration system to discharge the lubricating liquid in time. At the same time, since the drain pipe has the effect of silencing, even if the cross-sectional size of the drain channel P on the partition is set larger (compared with the area of ​​the partition), the overall silencing effect of the muffler will not be weakened. As a comparative example, if the drain pipe is not provided on the partition, and only one (or several) holes are opened on the partition as drain holes, since this (or these) drain holes can only play a role of draining but not a role of silencing, in order not to affect the overall silencing effect of the muffler, the size of the drain hole can only be opened smaller, and in this case, the lubricating liquid circulating in the system cannot be discharged in real time. In comparison, the muffler 100 of the present application can not only discharge the lubricating liquid circulating in the system in real time, but also will not affect the overall silencing effect of the muffler.

[0052] It should be noted that although Figure 1A-Figure 1C The embodiment of the present invention shows a specific formation method of the drain pipe, a layout method relative to the partition, and a specific cross-sectional shape of the drain channel. The muffler of the first embodiment of the present application is not limited to Figure 1A-Figure 1CIn the embodiment shown, the drain pipe can be formed in other ways and arranged relative to the partition, and the cross-sectional shape of the drain channel can also be other shapes. For example, in addition to being partially formed by the shell, the drain pipe can also be formed by a complete pipe (such as Figure 3A The drain pipe may extend a certain distance only on the upstream side of the corresponding partition (as shown in the embodiment shown in 2B), or may extend a certain distance on both sides of the corresponding partition (as shown in Figure 2A In addition to being separated from the muffler pipe, the liquid discharge pipe can also be connected to the muffler pipe in the radial direction (such as Figure 5A and Figure 5B The cross-sectional shape of the drainage channel can be any shape (for example Figure 3A-3C The shapes listed in the embodiment shown in the figure). Other embodiments of the muffler of the first embodiment of the present application will be listed below by way of example.

[0053] Figure 2A-2C Some other embodiments of the first type of embodiment of the muffler according to the present application are shown, and these embodiments are mainly used to illustrate the Figure 1A-Figure 1C The first embodiment shown is different from the arrangement of the drain pipe (relative to the partition).

[0054] Figure 2A A muffler 120 according to a second embodiment of the first class of embodiments is shown, wherein: Figure 2A 1 is a front cross-sectional view of the muffler 120 cut along a plane passing through the axis. Figure 2A As shown, the muffler 120 also includes a housing 101, a first partition 123 and a second partition 124 disposed in the housing, and includes a first muffler pipe 125 and a second muffler pipe 126 disposed on the first partition 123 and the second partition 124, respectively, and a first drain pipe 127 and a second drain pipe 128 disposed on the first partition 123 and the second partition 124, respectively. Figure 2A The muffler 120 shown is similar to the Figures 1A-1C The muffler 100 shown is generally similar, differing primarily in that Figure 2A The first drain pipe 127 and the second drain pipe 128 of the muffler 120 shown in the figure extend a distance on both sides (i.e., the upstream side and the downstream side) of the corresponding partition. Figure 1A-Figure 1C The first drain pipe 117 and the second drain pipe 118 of the muffler 100 shown extend only a certain distance downstream of the corresponding partition. Figure 2A As for the silencer 120 shown, the first liquid discharge pipe 127 and the second liquid discharge pipe 128 can not only silence through the portion thereof extending on the downstream side of the corresponding partition, but also silence through the portion thereof extending on the upstream side of the corresponding partition. Figure 2A The muffler 120 shown is suitable for being placed horizontally in the use state.

[0055] Figure 2B A muffler 130 according to a third embodiment of the first class of embodiments is shown, wherein: Figure 2B 1 is a front cross-sectional view of the muffler 130 cut along a plane passing through the axis. Figure 2B As shown, the muffler 130 also includes a housing 101, a first partition 133 and a second partition 134 disposed in the housing, and includes a first muffler pipe 135 and a second muffler pipe 136 disposed on the first partition 133 and the second partition 134, respectively, and a first drain pipe 137 and a second drain pipe 138 disposed on the first partition 133 and the second partition 134, respectively. Figure 2B The muffler 130 shown is similar to the Figures 1A-1C The muffler 100 shown differs primarily in that Figure 2B The first drain pipe 127 and the second drain pipe 128 of the muffler 130 shown extend a distance on the upstream side of the corresponding partition, and Figures 1A-1C The first and second drain pipes 117 and 118 of the muffler 100 are shown to extend a distance on the downstream side of the corresponding partitions. Figure 2B The muffler 130 shown is suitable for being placed horizontally in the use state.

[0056] Figure 2C A fourth embodiment of a muffler 140 according to the first class of embodiments is shown, wherein: Figure 2C 1 is a three-dimensional cross-sectional view of the muffler 140 cut along a plane passing through the axis. Figure 2C As shown, the muffler 140 also includes a housing 101, a first partition 143 and a second partition 144 disposed in the housing, and includes a first muffler pipe 145 and a second muffler pipe 146 respectively disposed on the first partition 143 and the second partition 144. The muffler 140 also includes a drain pipe 147. Figure 2C The muffler 140 shown is similar to the Figures 1A-1C The muffler 100 shown differs primarily in that Figure 2C Although the muffler 140 shown in the figure has two partitions, it has only one drain pipe 147, which connects the first partition 143 and the second partition 144, and the drain channel P defined by the drain pipe 147 runs through the first partition 143 and the second partition 144. Figures 1A-1C The first partition plate 113 and the second partition plate 114 of the muffler 100 shown in the figure are each provided with a drain pipe, and the drain pipe does not connect the two partition plates. Figure 2CIn the illustrated embodiment, the drain pipe 147 is located in the second compartment 208, and does not extend into the first compartment 207 and the third compartment 209. The lubricating liquid in the first compartment 207 enters the drain pipe through the drain passage P on the first partition 143. The drain pipe 147 is also provided with a plurality of connecting holes 210, which are used to connect the inner space of the drain pipe 147 with the second compartment 208, so that the lubricating liquid in the second compartment 208 can enter the drain pipe 147. The lubricating liquid in the drain pipe 147 is finally discharged through the drain passage P on the second partition 144. In some embodiments, the connecting holes 210 are provided at the downstream position of the drain pipe 147 and close to the second partition 144, so that Figure 2C The muffler 140 shown is applicable not only to the case where it is placed horizontally in the use state, but also to the case where it is placed obliquely in the use state.

[0057] It can be seen that in Figure 1A-Figure 2C In the first to fourth embodiments of the first class of embodiments shown, the liquid discharge pipe in the muffler has only one pipe, and the pipe is independently arranged separately from the muffler pipe. In these embodiments, the cross-sectional shape of the liquid discharge channel can be set to different shapes, such as Figure 1C The cross-section of the drainage channel can also be other shapes, such as Figure 3A-3C Shape shown. Figure 3A-3C Other embodiments of the cross-sectional shape of the drainage channel are shown. Figure 3A is a schematic diagram of a first embodiment of the cross-sectional shape of the drainage channel, Figure 3B is a schematic diagram of a second embodiment of the cross-sectional shape of the drainage channel, Figure 3C is a schematic diagram of a third embodiment of the cross-sectional shape of the drainage channel, Figure 3A-3C The left side view of the muffler is shown. Figure 3A As shown, the drain pipe 317 is formed by a single circular tube, so the cross section of the drain channel P is circular. Figure 3B As shown, the drain pipe 327 is formed by an additional wall formed by a flat sheet and the housing 321, so the cross section of the drain channel P is arcuate. Figure 3C As shown, the drain pipe 337 is formed together with the shell 331 by an additional wall formed by a sheet material having a cross-sectional shape similar to that of a channel steel, so that the cross-sectional shape of the drain channel P is substantially rectangular.

[0058] Figure 4A and 4B A fifth embodiment of a muffler 400 according to the first class of embodiments is shown, wherein Figure 4A is a three-dimensional cross-sectional view of the muffler 400 cut along a plane passing through the axis, Figure 4B It is a left side view of the muffler 400. Figure 4Aand 4B The muffler 400 shown is Figures 1A-1C The mufflers 100 shown are generally similar, with the main difference being that the drain pipe of the fifth embodiment includes a pipe bundle formed by a plurality of sub-pipes 420, while the muffler 100 of the first embodiment includes a single pipe. The sub-pipes in the pipe bundle of the drain pipe each define a drain branch, which penetrates the corresponding partition, and the drain branches together define a drain channel P. In addition, the sub-pipes 420 can be arranged to have the same or different extension lengths, so as to meet the need to attenuate sound waves of different wavelengths.

[0059] Figure 5A and 5B A sixth embodiment of a muffler 500 according to the first class of embodiments is shown, wherein Figure 5A is a three-dimensional cross-sectional view of the muffler 500 cut along a plane passing through the axis, Figure 5B It is a left side view of the muffler 500. Figure 5A and 5B The muffler 500 shown is Figure 1A-Figure 1C The main difference of the muffler 100 shown is that Figures 1A-1C The muffler pipe and the drain pipe of the muffler 100 of the first embodiment shown in the figure are independent (or separated) pipes. Figure 5A and 5B The muffler pipe and the liquid discharge pipe of the muffler 500 of the sixth embodiment shown in FIG. 1 are pipelines connected in the radial direction. Figure 5A and 5B As shown, the muffler 500 includes a shell 501, a first partition 513 and a second partition 514 disposed in the shell 501, and a first muffler pipe 515 and a second muffler pipe 516 respectively disposed on the first partition 513 and the second partition 514. The muffler 500 also includes a first drain pipe 517 and a second drain pipe 518, which are respectively connected to the first muffler pipe 515 and the second muffler pipe 516 in radial direction. Therefore, in the cross section of the muffler 500, the travel channel T defined by the muffler pipe is connected to the drainage path P defined by the drain pipe, and the fluid in the muffler pipe can directly flow into the drain pipe in radial direction and be discharged from the muffler 500 along the drain pipe. Figure 5A and 5B The embodiment shown is particularly suitable for application scenarios where the space between the muffler pipe and the housing 501 is narrow, because the Figure 5A and 5B In the method of setting the drain pipe shown in the figure, the drain pipe and the muffler pipe can be made into an integrated special-shaped pipe, and then the special-shaped pipe is inserted and welded into the partition, and finally the assembled whole of the drain pipe, the muffler pipe and the partition is inserted into the housing 501. Figure 1A-Figure 1CIn the embodiment shown, the drain pipe needs to be welded to the partition separately, but this will cause difficulty in welding because the drain pipe is too close to the muffler pipe.

[0060] exist Figure 5A and Figure 5B In the embodiment described above, the bottom of the first muffler 515 is provided with an opening 525 extending along the axial direction thereof, and the first drainage pipe 517 connects the opening 525 at the bottom of the first muffler 515 to the housing 501 through an additional wall formed by two substantially flat sheets 522 and 524, so that a portion of the housing 501 and the two sheets 522 and 524 together form the first drainage pipe 517 (e.g., Figure 5B The second liquid discharge pipe 518 is formed in a similar manner to the first liquid discharge pipe 517, and will not be described in detail herein.

[0061] It should be noted that, although in the first type of embodiments of the muffler listed above, two partitions are provided in the muffler, in other embodiments not shown, the muffler may also have only one partition.

[0062] Figures 6A-7D A second embodiment of a silencer according to the present application is shown. The silencer of the second embodiment may be similar to the silencer of the first embodiment in terms of the formation of the discharge pipe, the arrangement relative to the partition, and the cross-sectional shape of the discharge channel. The difference is that the inner diameter of the silencer chamber of the silencer of the first embodiment is substantially the same as the inner diameter of the compressor exhaust channel, while the silencer of the second embodiment involves an expansion chamber type silencer, and the inner diameter of the silencer chamber is increased relative to the inner diameter of the compressor exhaust channel.

[0063] Fig. 6A and 6B A muffler 600 according to a first embodiment of the second class of embodiments of the present application is shown, wherein: Fig. 6A is a three-dimensional diagram of the muffler 600. Figure 6B 600 is a three-dimensional cross-sectional view of the muffler 600 cut along a plane passing through the axis. Fig. 6A and 6BAs shown, the muffler 600 includes a cylindrical shell 601, which defines a muffler chamber 602 and has an axis X2. An upstream end plate 651 and a downstream end plate 653 are respectively provided at two opposite axial ends of the shell 601, which are used to seal the muffler chamber 602, but an opening is respectively provided on the upstream end plate 651 and the downstream end plate 653, which are used to form a muffler chamber inlet 603 and a muffler chamber outlet 604 respectively. The muffler chamber inlet 603 and the muffler chamber outlet 604 are therefore connected to the muffler chamber 602 and are located at two opposite axial ends of the shell 601. An inlet pipe 661 and an outlet pipe 663 are respectively connected at the muffler chamber inlet 603 and the muffler chamber outlet 604, and the inlet pipe 661 and the outlet pipe 663 are used to connect the muffler 600 to the exhaust passage of the compressor, and the radial dimensions of the inlet pipe 661 and the outlet pipe 663 are substantially the same as the radial dimensions of the exhaust passage of the compressor.

[0064] Still like Fig. 6A and Figure 6B As shown, the muffler 600 further includes a first baffle 613, a second baffle 614, a first muffler pipe 615, a second muffler pipe 616, a first drain pipe 617 and a second drain pipe 618, which are arranged in the same manner as in Figure 1A-Figure 1C The arrangement of the same components in the illustrated muffler 100 is generally the same.

[0065] The position of the muffler chamber outlet 604 relative to the first drain pipe 617 and the second drain pipe 618 is set so that the liquid flowing out of the drain pipe can be discharged through the muffler chamber outlet 604. Fig. 6A and 6BIn the illustrated embodiment, the position of the muffler chamber outlet 604 on the downstream end plate 653 is arranged to be close to the housing 601, and is aligned axially with the first drain pipe 617 and the second drain pipe 618, and the muffler chamber inlet 603 is also arranged in the same manner as the muffler chamber outlet 604. Therefore, when the muffler 600 is arranged horizontally in use, the muffler chamber inlet 603, the muffler chamber outlet 604, the first drain pipe 617 and the second drain pipe 618 are aligned axially at the bottom of the muffler chamber 602, and the muffler chamber outlet 604 is located on the path of the drainage channel P defined by the first drain pipe 617 and the second drain pipe 618 extending axially, thereby ensuring that the lubricating liquid flowing out of the drainage channel P can flow out from the muffler chamber outlet 604. In the illustrated embodiment, the cross-sectional size and shape of the muffler chamber inlet 603, the muffler chamber outlet 604, the first drain pipe 617 and the second drain pipe 618 are the same. In some other embodiments, the cross-sectional dimensions of the muffler chamber inlet 603 and the muffler chamber outlet 604 can be designed to be larger than the cross-sectional dimensions of the drainage channel P of the first drainage pipe 617 and the second drainage pipe 618. The muffler chamber inlet 603 may not be arranged in the same manner as the muffler chamber outlet 604, and the muffler chamber outlet 604 only needs to be arranged in the above manner to meet the drainage requirements. The muffler 600 of this embodiment is not only applicable to the case where it is placed horizontally in the use state, but also applicable to the case where it is placed obliquely in the use state.

[0066] Fig. 7A The muffler 710 of the second embodiment of the second class of embodiments of the present application is shown. The muffler 710 of this embodiment is similar to the muffler 600 of the first embodiment, and the main difference is that the muffler 710 of the second embodiment is only provided with one partition plate 713, one muffler pipe 715 and one drain pipe 717, while the muffler 600 of the first embodiment is provided with two partition plates, two muffler pipes and two drain pipes. The drain pipe 717, the muffler chamber inlet 711 and the muffler chamber outlet 712 in the muffler 710 of the second embodiment are arranged in the same manner as the drain pipe, the muffler chamber inlet and the muffler chamber outlet in the muffler 600 of the first embodiment.

[0067] Figure 7B A muffler 720 of the third embodiment of the second category of embodiments of the present application is shown. The muffler 720 of this embodiment is similar to the muffler 710 of the second embodiment, with the main difference being that the muffler chamber inlet 711 of the muffler 710 of the second embodiment is axially aligned with the muffler chamber outlet 712 and the drain pipe 717, while the muffler chamber inlet 721 of the muffler 720 of the third embodiment is not coaxially arranged with the muffler outlet 722 and the drain pipe 727, but staggered, with only the muffler outlet 722 and the drain pipe 727 being axially aligned.

[0068] Figure 7CFIG. 1 shows a muffler 730 of a fourth embodiment of the second class of embodiments of the present application. The muffler 730 of this embodiment is similar to the muffler 710 of the first embodiment, with the main difference being that the muffler 600 of the first embodiment has a first drain pipe 617 and a second drain pipe 618 respectively disposed on the two partitions 613 and 614, while the muffler 730 of the fourth embodiment has only one drain pipe 737 disposed thereon. Figure 2C The arrangement of the drain pipe 147 in the fourth embodiment of the first type of embodiment is similar. The communication holes 760 on the drain pipe 737 are arranged around the axial direction of the drain pipe 737.

[0069] Fig.7D The muffler 740 of the fifth embodiment of the second class of embodiments of the present application is shown. The muffler 740 of this embodiment is similar to the muffler 600 of the first embodiment, and is also provided with two partitions (a first partition 743 and a second partition 744) and two drain pipes (a first drain pipe 747 and a second drain pipe 748). The difference is that the two drain pipes of the muffler 740 of the fifth embodiment have different settings, while the two drain pipes of the muffler 600 of the first embodiment have the same settings. Specifically, the first drain pipe 747 in the muffler 740 of the fifth embodiment only extends a distance on the upstream side of the corresponding first partition 743, while the second drain pipe 748 not only extends a distance on the upstream side and the downstream side of the corresponding second partition 744, but also extends on the downstream side of the second partition 744 until it reaches the muffler chamber outlet 742. In other words, the second drain pipe 748 connects the second partition 744 and the downstream end plate 753 at the muffler chamber outlet 742. The portion of the second drain pipe 748 extending between the second partition plate 744 and the downstream end plate 753 is arranged in the same manner as Figure 7C The drain tube 737 in the fourth embodiment shown is arranged in a similar manner.

[0070] Fig. 8A and 8B A muffler 800 according to the third embodiment of the present application (a multi-hole resonant cavity type muffler) is shown, wherein: Fig. 8A This is a three-dimensional diagram of the muffler 800. Figure 8B 800 is a three-dimensional cross-sectional view of the muffler 800. Fig. 8A and 8BAs shown, the muffler 800 includes a cylindrical shell 801, which defines a muffler chamber 802 and has an axis X3. The muffler 800 also includes an upstream end plate 851 and a downstream end plate 853 that close the two axial ends of the shell 801, and a muffler chamber inlet 803 and a muffler chamber outlet 804 that are respectively arranged on the upstream end plate 851 and the downstream end plate 853. The muffler chamber inlet 803 and the muffler chamber outlet 804 are respectively connected with an inlet pipe 861 and an outlet pipe 863, and the inlet pipe 861 and the outlet pipe 863 are used to connect the muffler 800 to the exhaust passage of the compressor, and the radial dimensions of the inlet pipe 861 and the outlet pipe 863 are substantially the same as the radial dimensions of the exhaust passage of the compressor.

[0071] A muffler pipe 815 and a drain pipe 817 are provided in the muffler chamber 802, and both of the muffler pipe 815 and the drain pipe 817 extend along the axis X3. The first axial end of the muffler pipe 815 is connected to the muffler chamber inlet 803, the second axial end of the muffler pipe 815 is closed by the downstream end plate 853, and the muffler pipe 815 is provided with a plurality of muffler pipe communication holes 825 for connecting the space in the muffler pipe 815 with the muffler chamber 802. The plurality of muffler pipe communication holes 825 are arranged along the axial direction and circumferential direction of the muffler pipe 815. The first axial end of the drain pipe 817 is closed by the upstream end plate 851, the second axial end of the drain pipe 817 is connected to the muffler chamber outlet 804, and the drain pipe 817 is provided with a plurality of drain pipe communication holes 827 for connecting the space in the drain pipe 817 with the muffler chamber 802. A plurality of drain pipe communication holes 827 are arranged along the circumferential direction and axial direction of the drain pipe 817 .

[0072] Similar to the first and second embodiments, the liquid discharge pipe of the muffler of the third embodiment is also arranged close to the shell or is partially formed by the shell. Fig. 8A and Figure 8B In the embodiment shown, the drain pipe 817 is formed by a complete tubular member (with Figure 3A 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, Figure 3B and Figure 3C When the muffler 800 is placed horizontally in use, the drain pipe 817 is located at the bottom of the housing 801, and the muffler chamber outlet 804 is axially aligned with the drain pipe 817, so it is located on the path of the drain channel P defined by the drain pipe extending axially.

[0073] Thus, the fluid to be silenced enters from the inlet pipe 861 and directly enters the silencer pipe 815 through the silencer chamber inlet 803, then enters the silencer chamber 802 through the silencer pipe connecting hole 825, then passes through the silencer chamber 802 and enters the discharge pipe 817 from the discharge pipe connecting hole 827, and is discharged from the silencer 800 from the silencer chamber outlet 804 and the outlet pipe 863.

[0074] After long-term observation, the inventor of the present application found that for the second embodiment (expansion chamber type) and the third embodiment (porous resonance chamber type) mufflers, in order to discharge the lubricating liquid from the muffler chamber, the mufflers of the prior art usually set a drainage hole at the bottom of the muffler (whether it is placed horizontally or tilted at the bottom) and connected an external drainage pipe, which not only increases the risk of refrigerant leakage, but also reduces the muffler effect. The mufflers of the second and third embodiments of the present application are provided with a drainage pipe that is arranged close to the shell or formed by the shell part, and the position of the muffler chamber outlet is changed so that the muffler chamber outlet is aligned with the drainage pipe along the axial direction, which can not only meet the refrigeration system's need to discharge the lubricating liquid in a timely manner, but also will not reduce the muffler effect, and will not bring the risk of refrigerant leakage.

[0075] Fig. 9 is a schematic diagram of a refrigeration system 900 using a muffler according to the present application. Fig. 9 As shown, the refrigeration system 900 includes an evaporator 910, a compressor 920, a condenser 930 and a throttle valve 940, which are connected to form a refrigeration cycle loop in which the refrigerant circulates. Specifically, the refrigerant is compressed into a high-pressure, high-temperature state in the compressor 920 and then discharged into the condenser 930. Then the refrigerant performs heat exchange with other media (such as ambient air) in the condenser 930, releases heat and is condensed into a high-pressure, liquid state, and then is discharged into the throttle valve 940. In the throttle valve 940, the refrigerant is expanded and throttled into a low-pressure two-phase state and then flows into the evaporator 910. Then, in the evaporator 910, heat exchange is performed with other media (such as water), and after absorbing heat and being evaporated into a low-pressure, gaseous state, it returns to the compressor 920 from the air intake of the compressor 920 to complete the refrigerant cycle. The muffler 950 according to the present application is disposed in the exhaust passage of the compressor 920, that is, disposed on the connecting pipeline between the compressor 920 and the condenser 930, so as to muffle the refrigerant which is substantially in a gaseous state in the exhaust passage of the compressor. The muffler 950 may be Figure 1A-Figure 8B The muffler shown in any one of the embodiments shown in .

[0076] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, variations, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects. Therefore, the examples of the embodiments of the present disclosure set out above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements and / or substantially equivalent solutions.

Claims

1. A muffler, comprising: a cylindrical housing defining a muffler chamber, the housing having an axis; a muffler chamber inlet and a muffler chamber outlet located at two opposite axial ends of the housing; at least one baffle located within the muffler chamber, each baffle being arranged substantially perpendicular to the axis of the housing and dividing the muffler chamber into at least two compartments; at least one muffler pipe, each of which is disposed on at least one of the partitions and extends a certain distance along the axis on at least one side of the corresponding partition, each muffler pipe defining a travel channel, the travel channel penetrating the corresponding partition; as well as at least one drain pipe, the at least one drain pipe is respectively arranged on the at least one partition and extends a certain distance along the axis on at least one side of the corresponding partition, each drain pipe defines a drain channel, the drain channel runs through the corresponding partition, wherein each drain pipe is arranged close to the shell or is partially formed by the shell; The position of the muffler chamber outlet relative to the at least one liquid drain pipe is arranged so that the liquid flowing out of the at least one liquid drain pipe can be discharged through the muffler chamber outlet.

2. The muffler according to claim 1, characterized in that: Each of the drainage pipes extends a certain distance along the axis on a side of the corresponding partition located downstream in the drainage direction; wherein, when the muffler is in use, the axis of the shell is arranged horizontally relative to a horizontal plane, the at least one drainage pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the at least one drainage pipe at the bottom of the muffler chamber; or Wherein, when the muffler is in use, the axis of the shell is arranged to be inclined relative to the horizontal plane.

3. The muffler according to claim 1, characterized in that: Each of the drainage pipes extends a certain distance along the axis on one side of the corresponding partition located upstream in the drainage direction, or each of the drainage pipes extends a certain distance along the axis on both opposite sides of the corresponding partition located upstream and downstream in the drainage direction; Wherein, when the muffler is in use, the axis of the shell is arranged horizontally relative to a horizontal plane, the at least one drainage pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the at least one drainage pipe at the bottom of the muffler chamber.

4. The muffler according to claim 2 or 3, characterized in that: The total cross-section of the drainage channel defined by the drainage pipe on each partition is determined by the circulation volume of the lubricating liquid during the operation of the unit, which is 0.1%-30% of the cross-section of the corresponding partition, so as to discharge the liquid lubricating fluid circulating in the system in real time.

5. The muffler according to claim 4, characterized in that: Each of the drains comprises a single tube.

6. The muffler according to claim 5, characterized in that: A portion of the single tube in the circumferential direction is formed by the shell, and another portion is formed by an additional wall, wherein the cross-sectional shape of the drain tube is non-circular; or The single tube is formed by a pipe having a circular cross section.

7. The muffler according to claim 4, characterized in that: Each of the drainage pipes includes a pipe bundle formed by a plurality of sub-pipes, and each sub-pipe in the pipe bundle is configured to have the same or different lengths.

8. The muffler according to claim 4, characterized in that: The liquid discharge pipe is radially connected to or separated from the muffler pipe on the corresponding partition plate.

9. The muffler according to claim 2 or 3, characterized in that: in, When the muffler is arranged horizontally relative to a horizontal plane during use, the muffler chamber inlet, the muffler chamber outlet and the at least one drain pipe are aligned at the bottom of the muffler chamber.

10. The muffler according to claim 2 or 3, characterized in that: The distance that each of the drain pipes extends on one side of the corresponding partition is determined according to the wavelength of the sound wave to be eliminated.

11. A muffler comprising: a cylindrical housing defining a muffler chamber, the housing having an axis; An upstream end plate and a downstream end plate respectively closing two axial ends of the shell, and a muffler chamber inlet and a muffler chamber outlet respectively arranged on the upstream end plate and the downstream end plate; a muffler pipe located in the muffler chamber, wherein a first axial end of the muffler pipe is connected to an inlet of the muffler chamber, a second axial end of the muffler pipe is closed by the downstream end plate, and the muffler pipe has a plurality of muffler pipe communication holes arranged through the pipe wall thereof to communicate the muffler chamber with the space in the muffler pipe; A liquid discharge pipe located in the muffler chamber, wherein a first axial end of the liquid discharge pipe is closed by the upstream end plate, a second axial end of the liquid discharge pipe is connected to the outlet of the muffler chamber, and the liquid discharge pipe has a plurality of liquid discharge pipe communication holes arranged through the pipe wall thereof to connect the muffler chamber with the space in the liquid discharge pipe; The liquid discharge pipe is arranged close to the shell or is partially formed by the shell.

12. The muffler according to claim 11, characterized in that: The outlet of the muffler chamber is aligned with the drain pipe along the axial direction.

13. A muffler comprising: a cylindrical housing defining a muffler chamber, the housing having an axis; a muffler chamber inlet and a muffler chamber outlet located at two opposite axial ends of the housing; at least one baffle located within the muffler chamber, each baffle being arranged substantially perpendicular to the axis of the housing and dividing the muffler chamber into at least two compartments; at least one muffler pipe, each of which is disposed on at least one of the partitions and extends a certain distance along the axis on at least one side of the corresponding partition, each muffler pipe defining a travel channel, the travel channel penetrating the corresponding partition; as well as A drain pipe, the drain pipe connects two adjacent partitions and defines a drain channel, the drain channel runs through the two adjacent partitions; Or the drainage pipe is arranged on the partition adjacent to the muffler chamber outlet and connects the partition adjacent to the muffler chamber outlet and the muffler chamber outlet, and the drainage pipe defines a drainage channel, and the drainage channel passes through the partition adjacent to the muffler chamber outlet; wherein the liquid discharge pipe is arranged close to the shell or is partially formed by the shell, and the outlet of the muffler chamber is aligned with the liquid discharge pipe along the axial direction; and Wherein, the drain pipe is provided with a plurality of communication holes to connect the inner space of the drain pipe with the compartment where the drain pipe is located.

14. The muffler according to claim 13, Features: Wherein, when the muffler is in use, the axis of the shell is arranged horizontally relative to a horizontal plane, the drain pipe is located at the bottom of the muffler chamber, and the muffler chamber outlet is axially aligned with the drain pipe at the bottom of the muffler chamber; or Wherein, when the muffler is in use, the axis of the shell is arranged to be inclined relative to the horizontal plane.

15. The muffler according to claim 14, characterized in that: The total cross-section of the drainage channel defined by the drainage pipe on each partition is determined by the circulation volume of the lubricating liquid during the operation of the unit, which is 0.1%-30% of the cross-section of the corresponding partition, so as to discharge the lubricating liquid circulating in the system in real time.

16. The muffler according to claim 15, characterized in that: A portion of the drain pipe along the circumferential direction is formed by the shell, and another portion is formed by an additional wall, wherein the cross-sectional shape of the drain pipe is non-circular; or The liquid discharge pipe is formed by a pipe having a circular cross section.

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