A low back pressure rolling rotor compressor and air conditioner

Abstract

A low back-pressure rolling rotor compressor and air conditioner, relating to the technical field of air conditioning, the low back-pressure rolling rotor compressor comprises a shell, a cylinder assembly is fixed to the shell, an oil cylinder assembly is fixed to the bottom of the cylinder assembly, the oil cylinder assembly is connected to an oil pool, the cylinder assembly is provided with a first oil discharge channel connected to the oil cylinder assembly, and the first oil discharge channel is connected to the center of the pump body of the cylinder assembly. The present invention fixes the oil cylinder assembly at the bottom of the cylinder assembly and connects it to the oil pool, and at the same time opens a first oil discharge channel on the cylinder assembly that connects the inside of the oil cylinder assembly and the inside of the cylinder assembly, so that lubricating oil is sent to the center of the pump body of the cylinder assembly for lubrication, and finally returns to the oil pool through the crankshaft short shaft gap, thereby solving the oil supply difficulties and poor lubrication of the low back-pressure compressor and improving the reliability of the compressor; at the same time, the crankshaft does not need to be provided with a central oil hole and upper and lower eccentric parts, thereby reducing the mass of the motor balance block and improving the stability and reliability of single-cylinder compression.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a low back pressure rolling rotor type compressor and an air conditioner. Background Art

[0002] In recent years, rotary compressors have become popular worldwide, and are increasingly used in air conditioners, water heaters, refrigeration equipment and other fields. Compared with the structure with high pressure in the shell, there is a rotary compressor with low pressure in the shell. The compressor with low pressure in the shell (low back pressure compressor) reduces the shell pressure requirement, which can significantly reduce the weight and cost of the compressor, and can greatly reduce the refrigerant charge, so that the refrigerant packaging volume of the system is reduced, which improves safety and reduces costs.

[0003] For rolling rotor compressors used in mobile equipment such as car air conditioners, because they are in a dynamic environment, low back pressure is the first choice for safety reasons. Low back pressure rotor compressors have the advantages of light weight and good vibration resistance.

[0004] However, compared with high back-pressure compressors, the existing low back-pressure rotary compressors have the problem of difficulty or inability to supply oil between the friction pairs of the pump body. This is mainly because, under the existing pump oil structure of the low back-pressure compressor, the lubricating oil is located in the low pressure inside the shell, while the working chamber of the compressor is high pressure, resulting in the friction pair pressure of the roller inner circle, crankshaft and roller end face always being higher than the oil pool, and the crankshaft pump oil is difficult to enter the roller end face for effective lubrication, resulting in poor sealing, large leakage and severe wear. At the same time, in order to reduce the oil circulation rate, it is necessary to limit the amount of lubricating oil entering the cylinder compression chamber, resulting in less lubricating oil in the cylinder, and insufficient lubricating oil infiltrating the roller end face, further exacerbating leakage and wear.

[0005] Patents CN101354041B and CN101743404A introduce a method of setting an oil separator at the exhaust port and introducing the separated oil into the tail cavity of the vane, which can improve the lubrication of the vane, but cannot effectively lubricate the cylinder working cavity, roller end face and inner circle.

[0006] Patent No. CN108005901A introduces a structure for lubricating the roller end face. The oil groove connected to the suction chamber on the lower flange is intermittently opened and closed as the roller rotates, thereby introducing the oil in the oil pool into the cylinder working chamber to play a lubricating and sealing role. However, due to the low back pressure in the housing, the oil supply is limited, making it difficult to effectively lubricate the roller end face, inner circle, and crankshaft. Summary of the invention

[0007] One of the objects of the present invention is to avoid the deficiencies in the prior art and provide a low back-pressure rolling rotor compressor. The low back-pressure rolling rotor compressor can solve the problem that the pressure in the casing is low and the working chamber is high, and the high pressure leaks through the roller end face to the center of the pump body (roller end face, inner circle, crankshaft part), causing the pressure in the center part to be slightly higher than the low pressure in the casing, thereby making it difficult to oil the center part of the pump body, which is in a state of lack of oil or low oil. The friction pair in this part is difficult to achieve effective lubrication and sealing, resulting in heavy wear, poor reliability and low performance.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A low back pressure rolling rotor compressor is provided, comprising a housing, a cylinder assembly is fixed inside the housing, an oil cylinder assembly is fixed inside the housing and at the bottom of the cylinder assembly, a crankshaft is fixed to the cylinder assembly and the oil cylinder assembly, the inside of the oil cylinder assembly is connected to the oil pool at the bottom of the housing, the cylinder assembly is provided with a first oil discharge channel connected to the inside of the oil cylinder assembly, and the first oil discharge channel is connected to the center of the pump body of the cylinder assembly. By fixing the oil cylinder assembly at the bottom of the cylinder assembly and connecting the oil cylinder assembly with the oil pool at the bottom of the housing, and at the same time opening the first oil discharge channel connecting the inside of the oil cylinder assembly and the inside of the cylinder assembly on the cylinder assembly, the lubricating oil drawn from the oil pool by the oil cylinder assembly is sent to the center of the pump body of the cylinder assembly for lubrication, and finally returns to the oil pool through the short shaft gap of the crankshaft, thereby solving the oil supply difficulty and poor lubrication of the low back pressure compressor and improving the reliability of the compressor; at the same time, the crankshaft does not need to be provided with a central oil hole and upper and lower eccentric parts, thereby reducing the mass of the motor balance block and improving the stability and reliability of the single cylinder compression.

[0010] Furthermore, a lower flange is fixed between the cylinder assembly and the oil cylinder assembly, and a second oil discharge passage is provided in the lower flange, and both ends of the second oil discharge passage are respectively connected to the interior of the oil cylinder assembly and the first oil discharge passage. By fixing the lower flange between the cylinder assembly and the oil cylinder assembly, and providing the second oil discharge passage connecting the interior of the oil cylinder assembly and the first oil discharge passage on the lower flange, and making the second oil discharge passage located at the bearing end face that matches the end face of the lower flange and the oil cylinder assembly, the lubrication and sealing of the end face of the oil cylinder assembly can be enhanced, and the reliability and performance can be improved.

[0011] Furthermore, a partition is fixed between the oil cylinder assembly and the lower flange, and a third oil discharge passage is provided on the partition, and both ends of the third oil discharge passage are respectively connected with the interior of the oil cylinder assembly and the second oil discharge passage. A partition is fixed between the oil cylinder assembly and the lower flange, and the partition can separate the oil cylinder assembly and the lower flange, and a third oil discharge passage is provided on the partition to connect the interior of the oil cylinder assembly and the second oil discharge passage, so that the lubricating oil inside the oil cylinder assembly can enter the second oil discharge passage.

[0012] Furthermore, an upper flange is fixed on the top of the cylinder assembly, and a fourth oil discharge channel is provided on the upper flange, and both ends of the fourth oil discharge channel are respectively connected to the first oil discharge channel and the center of the pump body of the cylinder assembly. By fixing the upper flange on the top of the cylinder assembly and providing the fourth oil discharge channel on the upper flange to connect the first oil discharge channel and the center of the pump body of the cylinder assembly, and making the fourth oil discharge channel located on the bearing end face that matches the end face of the upper flange and the cylinder assembly, the lubrication and sealing of the end face of the cylinder assembly can be enhanced, and the reliability and performance can be improved.

[0013] Furthermore, the crankshaft is provided with oil grooves along the axial direction of the crankshaft at the locations inside the cylinder assembly and the oil cylinder assembly, respectively. The crankshaft is provided with oil grooves along the axial direction of the crankshaft at the locations inside the cylinder assembly and the oil cylinder assembly, respectively. The oil grooves can ensure that the lubricating oil entering the center of the pump body of the cylinder assembly can smoothly flow into the center of the pump body of the oil cylinder assembly, and flow back to the oil pool from the center of the pump body of the oil cylinder assembly, thereby forming a circulating lubricating oil circuit.

[0014] Furthermore, the oil cylinder assembly includes an oil cylinder, and a lower roller and a lower slide plate arranged inside the oil cylinder. The oil cylinder assembly includes an oil cylinder, and a lower roller and a lower slide plate arranged inside the oil cylinder, and the lubricating oil in the oil pool is sent into the third oil discharge channel by the suction force generated by the compression of the lower roller and the lower slide plate inside the oil cylinder.

[0015] Furthermore, a cylinder cover is fixed at the bottom of the oil cylinder, and an oil guide pipe connecting the interior of the oil cylinder and the oil pool at the bottom of the shell is fixed to the oil cylinder cover. The oil cylinder cover fixed at the bottom of the oil cylinder plays a role in sealing the oil cylinder to prevent the lubricating oil entering the interior of the oil cylinder from flowing back to the oil pool. The oil guide pipe connecting the interior of the oil cylinder and the oil pool at the bottom of the shell fixed by the oil cylinder cover is used to connect the interior of the oil cylinder and the oil pool, and when the oil cylinder generates suction, the lubricating oil can be extracted from the oil pool.

[0016] Furthermore, the cylinder assembly includes a cylinder, and an upper roller and an upper slide arranged inside the cylinder. The cylinder assembly includes a cylinder, and an upper roller and an upper slide arranged inside the cylinder, which are used to realize refrigerant compression.

[0017] Furthermore, the crankshaft is provided with a motor assembly, and the motor assembly is fixed on the inner side wall of the housing. The crankshaft is provided with a motor assembly, and the motor assembly is fixed on the inner side wall of the housing, and the motor assembly is used to drive the cylinder assembly and the oil cylinder assembly to operate.

[0018] Beneficial effects of the present invention: A low back-pressure rolling rotor compressor of the present invention comprises a shell, a cylinder assembly is fixed inside the shell, an oil cylinder assembly is fixed inside the shell and at the bottom of the cylinder assembly, a crankshaft is fixed to the cylinder assembly and the oil cylinder assembly, the interior of the oil cylinder assembly is connected to the oil pool at the bottom of the shell, the cylinder assembly is provided with a first oil discharge channel connected to the interior of the oil cylinder assembly, and the first oil discharge channel is connected to the center of the pump body of the cylinder assembly. The present invention fixes the oil cylinder assembly at the bottom of the cylinder assembly and connects the oil cylinder assembly with the oil pool at the bottom of the shell, and at the same time opens a first oil discharge channel on the cylinder assembly that connects the inside of the oil cylinder assembly and the inside of the cylinder assembly, so that the lubricating oil drawn from the oil pool by the oil cylinder assembly is sent to the central part of the pump body of the cylinder assembly for lubrication, and finally returns to the oil pool through the short shaft gap of the crankshaft, thereby solving the oil supply difficulties and poor lubrication of the low back pressure compressor and improving the reliability of the compressor; at the same time, the crankshaft does not need to be provided with a central oil hole and upper and lower eccentric parts, thereby reducing the mass of the motor balance block and improving the stability and reliability during single-cylinder compression.

[0019] The second purpose of the present invention is to avoid the deficiencies in the prior art and provide an air conditioner, which uses the above-mentioned low back-pressure rolling rotor compressor. The cylinder assembly is fixed at the bottom of the cylinder assembly, and the cylinder assembly is connected to the oil pool at the bottom of the shell. At the same time, a first oil discharge channel connecting the interior of the cylinder assembly and the interior of the cylinder assembly is opened on the cylinder assembly. The lubricating oil drawn from the oil pool by the cylinder assembly is sent to the center of the pump body of the cylinder assembly for lubrication, and finally returns to the oil pool through the short shaft gap of the crankshaft, thereby solving the oil supply difficulties and poor lubrication of the low back-pressure compressor and improving the reliability of the compressor. At the same time, the crankshaft does not need to be provided with a central oil hole and upper and lower eccentric parts, which reduces the mass of the motor balance block and improves the stability and reliability of single-cylinder compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0021] Figure 1 It is a sectional view of the overall structure of a low back pressure rolling rotor type compressor of the present invention.

[0022] Figure 2It is a cross-sectional view of the lower half structure of a low back-pressure rolling rotor compressor of the present invention.

[0023] Figure 3 It is a half-section view of the lower flange structure of a low back-pressure rolling rotor compressor of the present invention.

[0024] Figure 4 It is a schematic diagram of the partition structure of a low back pressure rolling rotor compressor of the present invention.

[0025] Figure 5 The present invention is a schematic diagram of the upper flange and cylinder structure of a low back pressure rolling rotor compressor.

[0026] Figure 6 It is a half-section view of the upper flange structure of a low back-pressure rolling rotor compressor of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the lower half of a crankshaft of a low back-pressure rolling rotor compressor of the present invention.

[0028] Figure 8 The present invention is a schematic diagram of the structure of an oil cylinder and an oil cylinder cover of a low back pressure rolling rotor type compressor.

[0029] The figure includes:

[0030] Housing 1, cylinder assembly 2, oil cylinder assembly 3, crankshaft 4, oil pool 5, first oil discharge channel 6, lower flange 7, second oil discharge channel 8, partition 9, third oil discharge channel 10, upper flange 11, fourth oil discharge channel 12, oil groove 13, oil cylinder 14, lower roller 15, lower slide 16, cylinder cover 17, oil guide pipe 18, cylinder 19, upper roller 20, upper slide 21, motor assembly 22. DETAILED DESCRIPTION

[0031] The present invention is further described in conjunction with the following examples.

[0032] Example 1

[0033] A low back pressure rolling rotor compressor of this embodiment, such as Figure 1-8As shown, it includes a shell 1, a cylinder assembly 2 is fixed inside the shell 1, an oil cylinder assembly 3 is fixed inside the shell 1 and at the bottom of the cylinder assembly 2, a crankshaft 4 is fixed to the cylinder assembly 2 and the oil cylinder assembly 3, the interior of the oil cylinder assembly 3 is communicated with the oil pool 5 at the bottom of the shell 1, the cylinder assembly 2 is provided with a first oil discharge channel 6 communicated with the interior of the oil cylinder assembly 3, and the first oil discharge channel 6 is communicated with the center part of the pump body of the cylinder assembly 2. By fixing the cylinder assembly 3 at the bottom of the cylinder assembly 2 and connecting the cylinder assembly 3 with the oil pool 5 at the bottom of the shell 1, and opening a first oil discharge channel 6 on the cylinder assembly 2 to connect the interior of the cylinder assembly 3 and the interior of the cylinder assembly 2, the lubricating oil drawn from the oil pool 5 by the cylinder assembly 3 is sent to the central part of the pump body of the cylinder assembly 2 for lubrication, and finally returns to the oil pool 5 through the short shaft gap of the crankshaft 4, thereby solving the oil supply difficulties and poor lubrication of the low back pressure compressor and improving the reliability of the compressor; at the same time, the crankshaft 4 does not need to be provided with a central oil hole and upper and lower eccentric parts, which reduces the mass of the motor balance block and improves the stability and reliability of single-cylinder compression.

[0034] A lower flange 7 is fixed between the cylinder assembly 2 and the oil cylinder assembly 3, and a second oil discharge channel 8 is provided in the lower flange 7, and the two ends of the second oil discharge channel 8 are respectively connected to the interior of the oil cylinder assembly 3 and the first oil discharge channel 6. By fixing the lower flange 7 between the cylinder assembly 2 and the oil cylinder assembly 3, and providing the second oil discharge channel 8 connecting the interior of the oil cylinder assembly 3 and the first oil discharge channel 6 on the lower flange 7, and making the second oil discharge channel 8 located at the bearing end face matching the end face of the lower flange 7 and the oil cylinder assembly 3, the lubrication and sealing of the end face of the oil cylinder assembly 3 can be enhanced, and the reliability and performance can be improved. Correspondingly, in order to better lubricate the crankshaft 4 and the inner side wall of the lower flange 7 on which the crankshaft 4 is mounted, a straight oil groove can be provided on the inner side wall of the lower flange 7 on which the crankshaft 4 is mounted.

[0035] A partition plate 9 is fixed between the oil cylinder assembly 3 and the lower flange 7, and a third oil discharge passage 10 is provided on the partition plate 9. Both ends of the third oil discharge passage 10 are respectively connected with the interior of the oil cylinder assembly 3 and the second oil discharge passage 8. A partition plate 9 is fixed between the oil cylinder assembly 3 and the lower flange 7, and the partition plate 9 can separate the oil cylinder assembly 3 from the lower flange 7. At the same time, the third oil discharge passage 10 connecting the interior of the oil cylinder assembly 3 and the second oil discharge passage 8 is provided on the partition plate 9, so that the lubricating oil inside the oil cylinder assembly 3 can enter the second oil discharge passage 8.

[0036] An upper flange 11 is fixed on the top of the cylinder assembly 2, and a fourth oil discharge channel 12 is provided on the upper flange 11. The two ends of the fourth oil discharge channel 12 are respectively connected to the first oil discharge channel 6 and the center of the pump body of the cylinder assembly 2. By fixing the upper flange 11 on the top of the cylinder assembly 2, and providing the fourth oil discharge channel 12 on the upper flange 11 to connect the first oil discharge channel 6 and the center of the pump body of the cylinder assembly 2, and making the fourth oil discharge channel 12 located on the bearing end face that matches the end face of the upper flange 11 and the cylinder assembly 2, the lubrication and sealing of the end face of the cylinder assembly 2 can be enhanced, and the reliability and performance can be improved. Correspondingly, in order to better lubricate the crankshaft 4 and the inner side wall of the upper flange 11 on which the crankshaft 4 is installed, a spiral oil groove can be provided on the inner side wall of the upper flange 11 on which the crankshaft 4 is installed.

[0037] The crankshaft 4 is respectively located inside the cylinder assembly 2 and inside the oil cylinder assembly 3, and an oil path groove 13 is opened along the axial direction of the crankshaft 4. The crankshaft 4 is respectively located inside the cylinder assembly 2 and inside the oil cylinder assembly 3, and an oil path groove 13 is opened along the axial direction of the crankshaft 4. The oil path groove 13 can ensure that the lubricating oil entering the center part of the pump body of the cylinder assembly 2 can smoothly flow into the center part of the pump body of the oil cylinder assembly 3, and flow back to the oil pool from the center part of the pump body of the oil cylinder assembly 3, thereby forming a circulating lubricating oil path.

[0038] The oil cylinder assembly 3 includes an oil cylinder 14, and a lower roller 15 and a lower slide 16 disposed inside the oil cylinder 14. The oil cylinder assembly 3 includes an oil cylinder 14, and a lower roller 15 and a lower slide 16 disposed inside the oil cylinder 14. The lubricating oil in the oil pool 5 is sent into the third oil discharge channel 10 by the suction force generated by the compression of the lower roller 15 and the lower slide 16 inside the oil cylinder 14.

[0039] The bottom of the oil cylinder 14 is fixed with an oil cylinder cover 17, and the oil cylinder cover 17 is fixed with an oil guide pipe 18 connecting the inside of the oil cylinder 14 and the oil pool 5 at the bottom of the housing 1. The oil cylinder cover 17 fixed at the bottom of the oil cylinder 14 plays a role in sealing the oil cylinder 14 to prevent the lubricating oil entering the inside of the oil cylinder 14 from flowing back to the oil pool 5. The oil guide pipe 18 connecting the inside of the oil cylinder 14 and the oil pool 5 at the bottom of the housing 1, fixed by the oil cylinder cover 17, is used to connect the inside of the oil cylinder 14 and the oil pool 5, and can extract lubricating oil from the oil pool 5 when the oil cylinder 14 generates suction.

[0040] The cylinder assembly 2 includes a cylinder 19, and an upper roller 20 and an upper slide 21 disposed inside the cylinder 19. The cylinder assembly 2 includes a cylinder 19, and an upper roller 20 and an upper slide 21 disposed inside the cylinder 19, and is used to realize refrigerant compression.

[0041] The crankshaft 4 is provided with a motor assembly 22, and the motor assembly 22 is fixed on the inner side wall of the housing 1. The crankshaft 4 is provided with a motor assembly 22, and the motor assembly 22 is fixed on the inner side wall of the housing 1. The motor assembly 22 is used to drive the cylinder assembly 2 and the oil cylinder assembly 3 to operate.

[0042] Working principle: while the cylinder assembly 2 compresses the gas, the crankshaft 4 will also drive the lower roller inside the oil cylinder 14 to run at the same time, and the low-pressure lubricating oil in the oil pool 5 enters the oil cylinder 14 through the oil guide pipe 18 on the oil suction hole of the cylinder cover 17. After being compressed by the oil cylinder 14, the low-pressure lubricating oil is discharged into the third oil discharge channel 10 of the partition 9, and then enters the second oil discharge channel 8, the first oil discharge channel 6 and the fourth oil discharge channel 12 in sequence through the third oil discharge channel 10, and then enters the pump body friction pair lubrication system of the cylinder assembly 2 through the fourth oil discharge channel 12, and the lubricating oil fills the matching clearance between the upper roller 20 and the crankshaft 4 and the cylinder 19, and then flows into the pump body friction pair lubrication system of the cylinder assembly 3 through the clearance of the crankshaft 4 and the first oil path groove 13 on the crankshaft 4, and the lubricating oil fills the matching clearance between the lower roller 15 and the crankshaft 4 and the oil cylinder 14, and finally flows into the oil pool 5 through the clearance of the crankshaft 4 and the second oil path groove 13 on the crankshaft 4 to form an oil path loop.

[0043] Example 2

[0044] The present embodiment provides an air conditioner, which uses the low back-pressure rolling rotor compressor described in Example 1. By fixing the cylinder assembly 3 at the bottom of the cylinder assembly 2 and connecting the cylinder assembly 3 with the oil pool 5 at the bottom of the shell 1, and opening a first oil discharge channel 6 on the cylinder assembly 2 to connect the interior of the cylinder assembly 3 and the interior of the cylinder assembly 2, the lubricating oil drawn from the oil pool 5 by the cylinder assembly 3 is sent to the center of the pump body of the cylinder assembly 2 for lubrication, and finally returns to the oil pool 5 through the short shaft gap of the crankshaft 4, thereby solving the oil supply difficulties and poor lubrication of the low back-pressure compressor and improving the reliability of the compressor. At the same time, the crankshaft 4 does not need to be provided with a central oil hole and upper and lower eccentric parts, thereby reducing the mass of the motor balance block and improving the stability and reliability of single-cylinder compression.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A low back pressure rolling rotor compressor, comprising a housing, wherein a cylinder assembly is fixed inside the housing, characterized in that: An oil cylinder assembly is fixed inside the housing and at the bottom of the cylinder assembly, a crankshaft is fixed to the cylinder assembly and the oil cylinder assembly, the interior of the oil cylinder assembly is communicated with the oil pool at the bottom of the housing, the cylinder assembly is provided with a first oil discharge passage communicated with the interior of the oil cylinder assembly, and the first oil discharge passage is communicated with the center of the pump body of the cylinder assembly; A lower flange is fixed between the cylinder assembly and the oil cylinder assembly, and a second oil discharge passage is formed in the lower flange, and two ends of the second oil discharge passage are respectively connected with the interior of the oil cylinder assembly and the first oil discharge passage; A partition is fixed between the oil cylinder assembly and the lower flange, and the partition is provided with a third oil discharge passage, and two ends of the third oil discharge passage are respectively communicated with the interior of the oil cylinder assembly and the second oil discharge passage; An upper flange is fixed on the top of the cylinder assembly, and a fourth oil discharge passage is formed on the upper flange, and two ends of the fourth oil discharge passage are respectively connected with the first oil discharge passage and the center of the pump body of the cylinder assembly; The crankshaft is provided with oil grooves along the axial direction of the crankshaft at locations located inside the cylinder assembly and inside the oil cylinder assembly respectively; The oil cylinder assembly comprises an oil cylinder, and a lower roller and a lower slide arranged inside the oil cylinder; A cylinder cover is fixed at the bottom of the cylinder, and an oil guide pipe communicating the inside of the cylinder and the oil pool at the bottom of the shell is fixed to the cylinder cover; The cylinder assembly comprises a cylinder, and an upper roller and an upper sliding sheet arranged inside the cylinder.

2. A low back pressure rolling rotor type compressor according to claim 1, characterized in that: The crankshaft is provided with a motor assembly, and the motor assembly is fixed on the inner side wall of the shell.

3. An air conditioner, characterized in that: A low back pressure rolling rotor compressor comprising the following:

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