Compressor and refrigerating system

Abstract

The invention discloses a compressor and a refrigerating system, and relates to the technical field of refrigerating systems. The first bearing, the first cylinder, the partition plate, the second cylinder and the second bearing are sequentially arranged; the first refrigerant flow path is arranged on the first bearing and communicates with the first air cylinder. The air inlet end of the second refrigerant flow path communicates with the second air cylinder. The first air outlet end of the first refrigerant flow path and the second air outlet end of the second refrigerant flow path are both located on the side, away from the first air cylinder, of the first bearing, and the first air outlet end of the first refrigerant flow path and the second air outlet end of the second refrigerant flow path do not communicate with each other. According to the technical scheme, the energy efficiency of the double-cylinder compressor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration systems, in particular to a compressor and a refrigeration system. BACKGROUND

[0002] The compressor is a mechanical device that can compress low-pressure gas into high-pressure gas, and is the core device of the refrigeration system such as air conditioner. The working reliability of the compressor is crucial to the operation of the air conditioning system. In order to improve the exhaust capacity, many compressors adopt double-cylinder compressors, but the structure design of the double-cylinder compressor in the prior art is often not reasonable, resulting in poor overall energy efficiency of the double-cylinder compressor. SUMMARY

[0003] The main purpose of the present application is to provide a compressor and a refrigeration system, which aims to improve the energy efficiency of the double-cylinder compressor.

[0004] To achieve the above purpose, the compressor provided by the present application comprises: a first bearing, a first cylinder, a partition plate, a second cylinder and a second bearing arranged in sequence; a first refrigerant flow path arranged in the first bearing and communicating with the first cylinder; a second refrigerant flow path, an intake end of the second refrigerant flow path communicating with the second cylinder; a first outlet end of the first refrigerant flow path and a second outlet end of the second refrigerant flow path are both arranged on a side of the first bearing away from the first cylinder, and the first outlet end of the first refrigerant flow path and the second outlet end of the second refrigerant flow path are arranged without communication.

[0005] In an embodiment, the compressor further comprises a first silencer arranged on the side of the first bearing away from the first cylinder, the first silencer comprising a first silencing cavity and a second silencing cavity spaced apart, the first outlet end communicating with the first silencing cavity, and the second outlet end communicating with the second silencing cavity.

[0006] In an embodiment, the first silencer is provided with a first exhaust port communicating with the first silencing cavity, and the distance from the first exhaust port to the side of the first bearing away from the first cylinder is greater than or equal to 5mm; and / or, the first silencer is provided with a second exhaust port communicating with the second silencing cavity, and the distance from the second exhaust port to the side of the first bearing away from the first cylinder is greater than or equal to 5mm.

[0007] In an embodiment, the first silencer comprises a main housing and a partition piece, the partition piece being arranged in the main housing to separate the first silencing cavity and the second silencing cavity.

[0008] In an embodiment, the compressor further comprises a second muffler, which is arranged on a side of the second bearing away from the second cylinder, and which is in communication with a second refrigerant flow path and is located between the intake end and the second discharge end.

[0009] In an embodiment, the first muffling cavity has a volume greater than that of the second muffling cavity.

[0010] In an embodiment, the compressor further comprises a first muffler and a second muffler, the first muffler is arranged on a side of the first bearing away from the first cylinder and is in communication with the first refrigerant flow path, and the second muffler is arranged on a side of the second bearing away from the second cylinder, and the second muffler is in communication with a second refrigerant flow path and is located between the intake end and the second discharge end.

[0011] In an embodiment, the side of the first bearing away from the first cylinder is further provided with a flow guide device, and the flow guide device is in communication with the second discharge end.

[0012] In an embodiment, the distance from the gas outlet hole of the flow guide device to the side of the first bearing away from the first cylinder is greater than or equal to 5 mm; and / or, The first muffler is provided with a first exhaust port in communication with the first muffling cavity, and the distance from the first exhaust port to the side of the first bearing away from the first cylinder is greater than or equal to 5 mm.

[0013] In an embodiment, the flow guide device is configured as a flow guide pipe.

[0014] In an embodiment, the compressor further comprises a second muffler, which is arranged on a side of the second bearing away from the second cylinder, and the second refrigerant flow path comprises a first flow path section and a second flow path section, the first flow path section penetrates the second bearing and is in communication with the second muffler, the intake end is arranged on the first flow path section, one end of the second flow path section is in communication with the second muffler, and the other end penetrates the second bearing, the second cylinder, the partition plate, the first cylinder and the first bearing in sequence, and the second discharge end is arranged on the second flow path section.

[0015] The present application also provides a refrigeration system comprising the compressor as described above.

[0016] The technical scheme of the present application sequentially arranges a first bearing, a first cylinder, a partition, a second cylinder and a second bearing; the first bearing is provided with a first refrigerant flow path, and the first refrigerant flow path is communicated with the first cylinder; a gas inlet end of a second refrigerant flow path is communicated with the second cylinder; a first gas outlet end of the first refrigerant flow path and a second gas outlet end of the second refrigerant flow path are both located on a side of the first bearing away from the first cylinder, that is, the refrigerant compressed by the first cylinder and the refrigerant compressed by the second cylinder are discharged from the same end of the compression part of the compressor, so that the working process is more stable. The first gas outlet end of the first refrigerant flow path and the second gas outlet end of the second refrigerant flow path are not communicated with each other, that is, the refrigerant discharged from the first gas outlet end and the second gas outlet end does not flow together in the chamber, that is, the first gas outlet end and the second gas outlet end in the present scheme are discharged from the same end of the compressor, but they are not communicated with each other, so that the influence of the pressure on each other does not need to be considered, thereby reducing the possibility of aggravating the pressure of the second cylinder, and further ensuring the energy efficiency of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0018] Figure 1 A structural schematic diagram of an embodiment of the compressor provided by the present application is shown in the figure. Figure 2 A structural schematic diagram of another embodiment of the compressor provided by the present application is shown in the figure. Figure 3 A structural schematic diagram of still another embodiment of the compressor provided by the present application is shown in the figure.

[0019] Explanation of reference numerals: 100, compressor; 101, crankshaft; 102, first eccentric part; 102, second eccentric part; 1, first bearing; 2, first cylinder; 3, partition; 4, second cylinder; 5, second bearing; 6, first refrigerant flow path; 61, first gas outlet end; 7, second refrigerant flow path; 71, second gas outlet end; 72, gas inlet end; 73, first flow path section; 74, second flow path section; 8, first silencer; 81, first silencing cavity; 82, second silencing cavity; 83, first exhaust port; 84, second exhaust port; 85, main housing; 86, partition; 87, second silencer; 88, communication pipe; 9, flow guide device; 91, flow guide pipe; 92, gas outlet hole.

[0020] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0022] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0023] In addition, if the embodiments of the present application involve descriptions such as “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0024] The present application provides a compressor 100.

[0025] Please refer to Figures 1 to 3 In an embodiment of the present application, the compressor 100 comprises: a first bearing 1, a first cylinder 2, a partition plate 3, a second cylinder 4 and a second bearing 5 arranged in sequence; a first refrigerant flow path 6 arranged in the first bearing 1 and communicating with the first cylinder 2; a second refrigerant flow path 7, wherein an inlet end 72 of the second refrigerant flow path 7 communicates with the second cylinder 4; a first outlet end 61 of the first refrigerant flow path 6 and a second outlet end 71 of the second refrigerant flow path 7 are both located on a side of the first bearing 1 away from the first cylinder 2, and the first outlet end 61 of the first refrigerant flow path 6 and the second outlet end 71 of the second refrigerant flow path 7 are arranged without communication.

[0026] Specifically, the compressor 100 is configured as a double-cylinder compressor 100, so the compressor 100 comprises a first bearing 1, a first cylinder 2, a partition plate 3, a second cylinder 4 and a second bearing 5 arranged in sequence, and the crankshaft 101 of the compressor 100 is provided with a first eccentric part 102 and a second eccentric part 102 arranged along the axial direction of the crankshaft 101, the crankshaft 101 is arranged in the first bearing 1, the first cylinder 2, the partition plate 3, the second cylinder 4 and the second bearing 5 in sequence, and drives the first eccentric part 102 to rotate eccentrically in the first cylinder 2 and the second eccentric part 102 to rotate eccentrically in the second cylinder 4, so as to continuously compress the gas in the first cylinder 2 and the second cylinder 4, thereby improving the exhaust capacity of the compressor 100 to improve the refrigeration efficiency. And the first eccentric part 102 and the second eccentric part 102 are often oppositely arranged, that is, the eccentric rollers of the two cylinders are 180° out of phase, that is, when one of the first cylinder 2 and the second cylinder 4 is in the compression stroke (most laborious), the other is just in the suction stroke (most labor-saving), so that the first cylinder 2 and the second cylinder 4 work together to reduce the torque peak value of the compressor 100, reduce the torque fluctuation, and be more stable.

[0027] And the first bearing 1 is provided with a first refrigerant flow path 6 communicating with the first cylinder 2, so as to discharge the refrigerant compressed by the first eccentric part 102; the compressor 100 comprises a second refrigerant flow path 7, and the second refrigerant flow path 7 communicates with the second cylinder 4 to discharge the refrigerant compressed by the second eccentric part 102. The first gas outlet end 61 of the first refrigerant flow path 6 and the second gas outlet end 71 of the second refrigerant flow path 7 are both located on the side of the first bearing 1 away from the first cylinder 2, that is, the refrigerant compressed by the first cylinder 2 and the refrigerant compressed by the second cylinder 4 are discharged from the same end of the compression part of the compressor 100, so that the working process is more stable.

[0028] It should be noted that since the first refrigerant flow path 6 is arranged in the first bearing 1, the first gas outlet end 61 of the first refrigerant flow path 6 is arranged on the first bearing 1, but the second gas outlet end 71 of the second refrigerant flow path 7 does not necessarily locate on the first bearing 1, for example, when the second refrigerant flow path 7 is a passage formed by a through hole structure arranged in the second bearing 5, the second cylinder 4, the partition plate 3, the first cylinder 2 and the first bearing 1 in sequence, the second gas outlet end 71 is arranged on the bearing; but if the second refrigerant flow path 7 leads to the end of the compressor 100 facing the first bearing 1 through an additional gas passage, then at this time the second refrigerant flow path 7 is only located on the side of the first bearing 1 away from the first cylinder 2 in its orientation, but it is not arranged on the first bearing 1, that is, the first gas outlet end 61 of the first refrigerant flow path 6 and the second gas outlet end 71 of the second refrigerant flow path 7 in the present scheme are both located on the side of the first bearing 1 away from the first cylinder 2, only for defining the orientation of the first gas outlet end 61 and the second gas outlet end 71 on the compressor 100, and not for defining the arrangement position of the first gas outlet end 61 and the second gas outlet end 71.

[0029] Furthermore, in the existing technology, the first outlet 61 of the first refrigerant flow path 6 and the second outlet 71 of the second refrigerant flow path 7 often converge in the same chamber (such as the silencer chamber) before being discharged from the compression section of the compressor 100, and then flow out of the compressor 100 together. In this arrangement, the refrigerant of the second cylinder 4 needs to bypass the side where the second bearing 5 is located and then be pumped into the chamber through the pump body, resulting in a large pressure loss. Moreover, when the second cylinder 4 enters the chamber, it often needs to overcome the pressure of the first cylinder 2 to do work. Therefore, the outlet pressure of the second cylinder 4 is greater than the pressure of the first cylinder 2, which may lead to an increase in the pressure of the second cylinder 4, which is not conducive to reducing energy efficiency. Therefore, in this scheme, the first outlet 61 of the first refrigerant flow path 6 and the second outlet 71 of the second refrigerant flow path 7 are not connected to each other. That is, the refrigerant discharged from the first outlet 61 and the second outlet 71 will not flow through the chamber. In other words, although the first outlet 61 and the second outlet 71 in this scheme are discharged from the same end of the compressor 100, they are not connected to each other. Therefore, there is no need to consider the influence of each other's pressure, thereby reducing the possibility of pressure aggravation in the second cylinder 4 and ensuring the energy efficiency of the compressor 100. Compared with the prior art scheme in which the first outlet 61 of the first refrigerant flow path 6 and the second outlet 71 of the second refrigerant flow path 7 flow through the same chamber before flowing out of the compressor 100, this compressor 100 structure improves energy efficiency by about 3%.

[0030] In this embodiment, the first cylinder 2 is configured as the upper cylinder, and the second cylinder 4 is configured as the lower cylinder. That is, the first bearing 1, the first cylinder 2, the partition 3, the second cylinder 4, and the second bearing 5 are stacked sequentially from top to bottom. Both the first refrigerant flow channel and the second refrigerant flow channel exhaust through the upper end of the compression section. However, in other embodiments, the first cylinder 2 can also be configured as the upper cylinder, and the second cylinder 4 as the lower cylinder. In this case, both the first refrigerant flow channel and the second refrigerant flow channel exhaust through the lower end of the compression section. Furthermore, since the refrigerant discharged from the first outlet 61 and the second outlet 71 converges within the chamber, it is usually to converge within the silencing cavity to achieve noise reduction. Therefore, in this solution, although the first outlet 61 of the first refrigerant flow path 6 and the second outlet 71 of the second refrigerant flow path 7 are not interconnected, it does not mean that the first outlet 61 and the second outlet 71 are not equipped with silencing structures. For example, silencing can be achieved by setting a silencer at each of the first outlet 61 and the second outlet 71.

[0031] In one embodiment of the present invention, please refer to Figure 1 and Figure 3The compressor 100 also includes a first silencer 8, which is located on the side of the first bearing 1 away from the first cylinder 2. The first silencer 8 includes a first silencing chamber 81 and a second silencing chamber 82 spaced apart. A first outlet end 61 connects to the first silencing chamber 81, and a second outlet end 71 connects to the second silencing chamber 82. Specifically, the first silencer 8 is located on the side of the first bearing 1 away from the first cylinder 2, and the projection of the first silencer 8 along the axial direction of the compressor 100 covers the first bearing 1, thereby facilitating the installation of the first silencer 8 and the first bearing 1. The first silencer 8 includes a first silencing chamber 81 and a second silencing chamber 82 spaced apart. The first outlet end 61 connects to the first silencing chamber 81, and the second outlet end 71 connects to the second silencing chamber 82, so that the first silencer 8 can simultaneously silence the first outlet end 61 and the second outlet end 71, and can ensure that the gas at the first outlet end 61 and the second outlet end 71 does not merge. Compared to existing technologies where the first muffler 8 has only one silencing chamber, and both the first outlet 61 and the second outlet 71 are connected to the silencing chamber (because in this design, the first cylinder 2 and the second cylinder 4 converge within the silencing chamber, and their exhaust gases are 180° apart, causing acoustic resonance between the refrigerant discharged from the first outlet 61 and the refrigerant discharged from the second outlet 71, resulting in increased compressor noise and weakening the muffler's silencing effect), this design helps ensure the silencing effect of the first muffler 8 and reduces the noise of the compressor 100. Furthermore, compared to having separate mufflers at the first outlet 61 and the second outlet 71, this design facilitates muffler installation.

[0032] To facilitate the manufacturing of the first muffler 8, the first muffler 8 includes a main housing 85 and a partition 86. The partition 86 is disposed within the main housing 85 to separate a first silencing chamber 81 and a second silencing chamber 82. That is, the partition 86 separates the first silencing chamber 81 and the second silencing chamber into two isolated chambers. Therefore, this type of first muffler 8 has a simple structure and is easy to manufacture. The main housing 85 and the partition 86 can be integrally molded, such as by injection molding. Alternatively, the main housing 85 and the partition 86 can be separately molded and then assembled. For example, the inner wall of the main housing 85 has a limiting groove, and the edge of the partition 86 engages with this limiting groove, thereby securing the partition 86 within the main housing 85. In other embodiments, the main housing 85 and the partition 86 can also be bonded together or connected together by fasteners.

[0033] In an embodiment of the present invention, the first muffler 8 is provided with a first exhaust port 83 communicating with the first muffler cavity 81, and the distance from the first exhaust port 83 to the side of the first bearing 1 opposite to the first cylinder 2 is greater than or equal to 5 mm. Specifically, the distance from the first exhaust port 83 to the side of the first bearing 1 opposite to the first cylinder 2 is... , This means limiting the exhaust height of the first exhaust port 83 in the first silencer chamber 81 to be greater than or equal to 5mm. When the compressor 100 is running, lubricating oil is pumped to the upper parts requiring lubrication (such as motors and bearings). After lubrication, the oil droplets rely on gravity to drip back into the oil sump at the bottom along the housing wall and the gaps between parts for recycling. Furthermore, because the high-pressure gas discharged from the first cylinder 2 travels at a very high speed, it forms a high-pressure cyclone zone. If the first exhaust port 83 is positioned too low, the high-pressure airflow will impact and obstruct the falling oil droplets, preventing them from returning smoothly to the oil sump. This would disrupt the lubricating oil's return process, potentially causing the second bearing 5 to wear due to insufficient lubrication. Therefore, limiting the exhaust height of the first exhaust port 83 in the first silencer chamber 81 to be greater than or equal to 5mm reduces the impact of the first outlet end 61 on the airflow at the first exhaust port 83, thereby improving the smoothness of oil return in the compressor 100 and ensuring its service life. Specifically, the distance from the first exhaust port 83 to the side of the first bearing 1 away from the first cylinder 2 can be 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0034] In another embodiment of the present invention, the first muffler 8 is provided with a second exhaust port 84 communicating with the second muffler cavity 82, and the distance from the second exhaust port 84 to the side of the first bearing 1 opposite to the first cylinder 2 is greater than or equal to 5 mm. Specifically, the distance from the second exhaust port 84 to the side of the first bearing 1 opposite to the first cylinder 2 is... , This means limiting the exhaust height of the second exhaust port 84 in the first silencer chamber 81 to be greater than or equal to 5mm. When the compressor 100 is running, lubricating oil is pumped to the upper parts requiring lubrication (such as motors and bearings). After lubrication, the oil droplets rely on gravity to drip back into the oil sump at the bottom along the housing wall and the gaps between parts for recycling. Furthermore, because the high-pressure gas discharged from the second cylinder 4 travels at a very high speed, it forms a high-pressure cyclone zone. If the second exhaust port 84 is positioned too low, the high-pressure airflow will impact and obstruct the falling oil droplets, preventing them from returning smoothly to the oil sump. This would disrupt the lubricating oil's return process, potentially causing insufficient lubrication and wear on the second bearing 5. Therefore, limiting the exhaust height of the second exhaust port 84 in the second silencer chamber 82 to be greater than or equal to 5mm reduces the impact of the second outlet end 71 on the airflow at the second exhaust port 84, thereby improving the smoothness of oil return in the compressor 100 and ensuring its service life. Specifically, the distance from the second exhaust port 84 to the side of the first bearing 1 away from the first cylinder 2 can be 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0035] In one embodiment, the compressor 100 further includes a second muffler 87, which is disposed on the side of the second bearing 5 opposite to the second cylinder 4. The second muffler 87 is connected to the second refrigerant flow path 7 and is located between the inlet end 72 and the outlet end 71. Specifically, the second muffler 87 is disposed on the side of the second bearing 5 opposite to the second cylinder 4 and is connected to the second refrigerant flow path 7, thereby further silencing the second refrigerant flow path 7, thereby further reducing the noise of the compressor 100 and improving the noise reduction effect of the compressor 100. Furthermore, since the second muffler 87 is located between the inlet end 72 and the outlet end 71, it not only silences the second refrigerant flow path but also serves to transfer the refrigerant, thus eliminating the need for an additional connecting pipe 88 between the inlet end 72 and the outlet end 71, thereby simplifying the structure of the compressor 100. Furthermore, it is understandable that the second muffler 87 may not be provided, and a connecting pipe 88 may be provided between the air inlet 72 and the second air outlet 71 to connect the air inlet 72 and the second air outlet 71 (see...). Figure 3 ).

[0036] Furthermore, the volume of the first silencing cavity 81 is larger than the volume of the second silencing cavity 82. Because the second refrigerant flow path 7 is equipped with a second silencer 87, some noise from the refrigerant in the second refrigerant flow path 7 has already been eliminated at the second outlet 71. Therefore, to ensure the silencing effect of the first outlet 61 and the second outlet 71, the volume of the first silencing cavity 81 is set to be larger than the volume of the second silencing cavity 82. This allows the first silencer 87 to focus on silencing the first refrigerant flow path, thereby controlling the maximum decibel value of the compressor 100's noise and improving the noise reduction effect. Of course, in other embodiments, the volumes of the first silencing cavity 81 and the second silencing cavity 82 can also be set to be equal. Alternatively, the volume of the first silencing cavity 81 can be smaller than the volume of the second silencing cavity 82.

[0037] In contrast to the first silencer 8 having a first silencer cavity 81 and a second silencer cavity 82 separated from each other, in another embodiment of the present invention, see... Figure 2The compressor 100 also includes a first muffler 8 and a second muffler 87. The first muffler 8 is located on the side of the first bearing 1 away from the first cylinder 2 and is connected to the first refrigerant flow path 6. The second muffler 87 is located on the side of the second bearing 5 away from the second cylinder 4 and is connected to the second refrigerant flow path 7, and is located between the inlet end 72 and the outlet end 71. Specifically, in this embodiment, the first muffler 8 has only one silencing chamber, which is connected to the first outlet end 61, so that the first muffler 8 is only used to reduce noise in the first refrigerant flow path 6; while the second muffler 87 is located on the side of the second bearing 5 away from the second cylinder 4 and is connected to the second refrigerant flow path 7, so as to reduce noise in the second refrigerant flow path 7, thereby achieving the purpose of separately reducing noise in the first refrigerant flow path 6 and the second refrigerant flow path 7, and reducing the noise of the compressor 100. Compared to existing technologies where the first silencer 8 has only one silencing chamber and both the first outlet end 61 and the second outlet end 71 are connected to the silencing chamber, this solution helps ensure the silencing effect of the first silencer 8 and reduces the noise of the compressor 100. Furthermore, compared to having separate silencers at the first outlet end 61 and the second outlet end 71, this solution facilitates silencer installation. The second silencer 87 is located on the side of the second bearing 5 away from the second cylinder 4, ensuring sufficient installation space for both the first and second silencers 8 and 87. Moreover, the second silencer 87 is located between the inlet end 72 and the second outlet end 71, meaning it not only silences the second refrigerant flow path but also serves to transfer the refrigerant, eliminating the need for an additional connecting pipe 88 between the inlet end 72 and the second outlet end 71, thus simplifying the structure of the compressor 100.

[0038] At this time, the axial projection area of ​​the first muffler 8 along the compressor 100 is generally smaller than the axial projection area of ​​the second bearing 5 along the compressor 100, so as to form a clearance space for the installation of the flow guide device 9. The flow guide device 9 is connected to the second air outlet 71, thereby further guiding the airflow of the second air outlet 71 and increasing the air outlet height of the second air outlet 71, improving the smoothness of oil return. The flow guide device 9 is configured as a flow guide pipe 91, thereby simplifying the structure of the flow guide device 9 and reducing the processing cost.

[0039] In one embodiment, the distance from the air outlet 92 of the flow guide device 9 to the side of the first bearing 1 opposite to the first cylinder 2 is greater than or equal to 5 mm; specifically, the distance from the air outlet 92 of the flow guide device 9 to the side of the first bearing 1 opposite to the first cylinder 2 is... , This means that the outlet height of the guide device 9 is limited to 5mm or more. When the compressor 100 is running, the lubricating oil is pumped to the upper parts that need lubrication (such as motors, bearings, etc.). After lubrication, the oil droplets need to rely on gravity to drip back into the oil sump at the bottom along the housing wall and the gaps between the parts so that they can be recycled. Moreover, because the high-pressure gas discharged from the second cylinder 4 has a very high speed, it will form a high-pressure cyclone zone. If the outlet height of the guide device 9 is too low, the high-pressure airflow will impact and obstruct the falling oil droplets, causing the oil droplets to be unable to return to the oil sump smoothly. This will result in the lubricating oil not falling smoothly back into the oil sump, which may lead to the second bearing 5 wearing due to insufficient lubrication. Therefore, the outlet height of the second exhaust port 84 in the second silencer chamber 82 is limited to 5mm or more, thereby reducing the impact of the second outlet end 71 on the airflow of the second exhaust port 84, thereby improving the smoothness of the oil return of the compressor 100 and ensuring the service life of the compressor 100. Specifically, the distance from the air outlet 92 of the flow guide device 9 to the side of the first bearing 1 away from the first cylinder 2 can be 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0040] In one embodiment, the first muffler 8 is provided with a first exhaust port 83 communicating with the first exhaust end 61, and the distance from the first exhaust port 83 to the side of the first bearing 1 opposite to the first cylinder 2 is greater than or equal to 5 mm. Specifically, the distance from the first exhaust port 83 to the side of the first bearing 1 opposite to the first cylinder 2 is... , This means limiting the exhaust height of the first exhaust port 83 in the first silencer chamber 81 to be greater than or equal to 5mm. When the compressor 100 is running, lubricating oil is pumped to the upper parts requiring lubrication (such as motors and bearings). After lubrication, the oil droplets rely on gravity to drip back into the oil sump at the bottom along the housing wall and the gaps between parts for recycling. Furthermore, because the high-pressure gas discharged from the first cylinder 2 travels at a very high speed, it forms a high-pressure cyclone zone. If the first exhaust port 83 is positioned too low, the high-pressure airflow will impact and obstruct the falling oil droplets, preventing them from returning smoothly to the oil sump. This would disrupt the lubricating oil's return process, potentially causing the second bearing 5 to wear due to insufficient lubrication. Therefore, limiting the exhaust height of the first exhaust port 83 in the first silencer chamber 81 to be greater than or equal to 5mm reduces the impact of the first outlet end 61 on the airflow at the first exhaust port 83, thereby improving the smoothness of oil return in the compressor 100 and ensuring its service life. Specifically, the distance from the first exhaust port 83 to the side of the first bearing 1 away from the first cylinder 2 can be 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0041] Reference Figures 1 to 3In an embodiment of the present invention, the compressor 100 further includes a second muffler 87, which is disposed on the side of the second bearing 5 away from the second cylinder 4. The second refrigerant flow path 7 includes a first flow path section 73 and a second flow path section 74. The first flow path section 73 passes through the second bearing 5 and is connected to the second muffler 87. The air inlet end 72 is disposed in the first flow path section 73. One end of the second flow path section 74 is connected to the second muffler 87, and the other end passes through the second bearing 5, the second cylinder 4, the partition 3, the first cylinder 2 and the first bearing 1 in sequence. The second air outlet end 71 is disposed in the second flow path section 74. Specifically, the second refrigerant flow path 7 in this scheme is divided into a first flow path 73 and a second flow path 74. The first flow path 73 and the second flow path 74 are connected through the second silencer 87. The first flow path 73 and the second flow path 74 are both located in the compression section itself, and are respectively located in the second bearing 5, the second cylinder 4, the partition 3, the first cylinder 2 and the first bearing 1. Therefore, it is not necessary to set up an additional guide pipe 91 to guide the refrigerant compressed by the second cylinder 4 to the side of the first bearing 1 away from the first cylinder 2, thereby simplifying the internal piping structure of the compressor 100 and helping to control the overall volume of the compressor 100.

[0042] The present invention also proposes a refrigeration system, which includes a compressor 100. The specific structure of the compressor 100 is as described in the above embodiments. Since the refrigeration system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A compressor, characterized in that, include: The first bearing, the first cylinder, the partition, the second cylinder, and the second bearing are arranged sequentially. A first refrigerant flow path is provided at the first bearing and connected to the first cylinder; The second refrigerant flow path has its inlet end connected to the second cylinder; the first outlet end of the first refrigerant flow path and the second outlet end of the second refrigerant flow path are both located on the side of the first bearing away from the first cylinder, and the first outlet end of the first refrigerant flow path and the second outlet end of the second refrigerant flow path are not connected to each other.

2. The compressor as described in claim 1, characterized in that, The compressor further includes a first muffler, which is located on the side of the first bearing away from the first cylinder. The first muffler includes a first muffler chamber and a second muffler chamber spaced apart from each other. The first outlet end is connected to the first muffler chamber, and the second outlet end is connected to the second muffler chamber.

3. The compressor as described in claim 2, characterized in that, The first muffler has a first exhaust port communicating with the first muffler chamber, and the distance from the first exhaust port to the side of the first bearing opposite to the first cylinder is greater than or equal to 5 mm; and / or, The first muffler is provided with a second exhaust port that connects to the second muffler chamber, and the distance from the second exhaust port to the side of the first bearing away from the first cylinder is greater than or equal to 5 mm.

4. The compressor as described in claim 2, characterized in that, The first muffler includes a main housing and a partition, the partition being disposed within the main housing to separate the first muffler cavity and the second muffler cavity.

5. The compressor as described in claim 2, characterized in that, The compressor further includes a second muffler, which is located on the side of the second bearing away from the second cylinder. The second muffler is connected to the second refrigerant flow path and is located between the inlet end and the second outlet end.

6. The compressor as described in claim 5, characterized in that, The volume of the first silencing cavity is larger than the volume of the second silencing cavity.

7. The compressor as claimed in claim 1, characterized in that, The compressor further includes a first muffler and a second muffler. The first muffler is located on the side of the first bearing away from the first cylinder and is connected to the first refrigerant flow path. The second muffler is located on the side of the second bearing away from the second cylinder and is connected to the second refrigerant flow path. It is located between the air inlet end and the second air outlet end.

8. The compressor as claimed in claim 7, characterized in that, The first bearing is also provided with a flow guide device on the side opposite to the first cylinder, and the flow guide device is connected to the second air outlet.

9. The compressor as claimed in claim 8, characterized in that, The distance from the air outlet of the flow guide device to the side of the first bearing opposite to the first cylinder is greater than or equal to 5 mm; and / or, The first muffler is provided with a first exhaust port that connects to the first muffler chamber, and the distance from the first exhaust port to the side of the first bearing away from the first cylinder is greater than or equal to 5 mm.

10. The compressor as claimed in claim 8, characterized in that, The flow guiding device is configured as a flow guiding pipe.

11. The compressor as claimed in claim 1, characterized in that, The compressor further includes a second muffler, which is located on the side of the second bearing away from the second cylinder. The second refrigerant flow path includes a first flow path section and a second flow path section. The first flow path section passes through the second bearing and connects to the second muffler. The air inlet is located in the first flow path section. One end of the second flow path section connects to the second muffler, and the other end passes through the second bearing, the second cylinder, the partition, the first cylinder, and the first bearing in sequence. The second air outlet is located in the second flow path section.

12. A refrigeration system, characterized in that, Includes the compressor as described in any one of claims 1 to 11.

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