CN110925211A - Low-backpressure rolling rotor type compressor and air conditioner - Google Patents

Low-backpressure rolling rotor type compressor and air conditioner Download PDF

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Publication number
CN110925211A
CN110925211A CN201911322334.XA CN201911322334A CN110925211A CN 110925211 A CN110925211 A CN 110925211A CN 201911322334 A CN201911322334 A CN 201911322334A CN 110925211 A CN110925211 A CN 110925211A
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CN
China
Prior art keywords
oil
cylinder assembly
oil cylinder
discharge channel
fixed
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Pending
Application number
CN201911322334.XA
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Chinese (zh)
Inventor
邓罡
陈圣
罗惠芳
吴健
巩庆霞
柯达俊
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Priority to CN201911322334.XA priority Critical patent/CN110925211A/en
Publication of CN110925211A publication Critical patent/CN110925211A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/40—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and having a hinged member
    • F04C18/44—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and having a hinged member with vanes hinged to the inner member

Abstract

The utility model provides a low back pressure rolling rotor formula compressor and air conditioner, relates to air conditioner technical field, and this low back pressure rolling rotor formula compressor includes the casing, and the casing is fixed with the cylinder subassembly, and the bottom of cylinder subassembly is fixed with the oil cylinder subassembly, and the oil cylinder subassembly communicates with the oil bath, and the first oil discharge passageway with the oil cylinder subassembly intercommunication is seted up to the cylinder subassembly, and first oil discharge passageway communicates with the pump body center part of cylinder subassembly. According to the invention, the oil cylinder assembly is fixed at the bottom of the air cylinder assembly and is communicated with the oil pool, meanwhile, the first oil discharge channel for communicating the interior of the oil cylinder assembly with the interior of the air cylinder assembly is formed on the air cylinder assembly, lubricating oil is fed into the central part of the pump body of the air cylinder assembly for lubrication, and finally, the lubricating oil returns to the oil pool from the short shaft gap of the crankshaft, so that the oil supply difficulty of the low-backpressure compressor is solved, the lubrication is poor, and the reliability of the compressor is improved; meanwhile, the crankshaft does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the quality of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.

Description

Low-backpressure rolling rotor type compressor and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a low-backpressure rolling rotor type compressor and an air conditioner.
Background
In recent years, rotary compressors have been widely used worldwide, and are increasingly used in the fields of air conditioners, water heaters, refrigeration equipment, and the like. There is a rotary compressor in which a casing is of a low-pressure structure, as opposed to a structure in which a casing is of a high pressure. The shell is internally provided with the low-pressure compressor (low-backpressure compressor), so that the pressure bearing requirement of the shell is reduced, the weight and the cost of the compressor can be obviously reduced, the filling amount of the refrigerant can be greatly reduced, the packaging amount of the refrigerant of the system is reduced, the safety is improved, and the cost is reduced.
For rolling rotor compressors used in mobile devices such as vehicle-mounted air conditioners and the like, low back pressure is preferred for safety reasons because of being in a dynamic environment, and the low back pressure rotor compressor has the advantages of light weight and good vibration resistance.
However, compared with the high-back-pressure compressor, the conventional rotary compressor with the low back pressure structure has the problem that oil is difficult to supply or cannot be supplied between the pump body friction pairs. The low-backpressure compressor is mainly characterized in that the interior of a shell where lubricating oil is located is low pressure and the working cavity of the compressor is high pressure under the existing oil pumping structure, so that the pressure of friction pairs such as an inner circle of a roller, a crankshaft part, the end surface of the roller and the like is always higher than that of an oil pool, crankshaft pump oil is difficult to enter the end surface of the roller to realize effective lubrication, and the problems of poor sealing, large leakage and serious abrasion are caused. Meanwhile, in order to reduce the oil circulation rate, the amount of lubricating oil entering the compression cavity of the cylinder needs to be limited, so that the lubricating oil in the cylinder is less, and the lubricating oil does not penetrate into the end face of the roller, thereby further aggravating leakage and abrasion.
Patent No. CN101354041B and patent No. CN101743404A describe that oil is provided at the exhaust port and the separated oil is introduced into the tail cavity of the sliding vane, which can improve the lubrication of the sliding vane, but cannot effectively lubricate the working cavity of the cylinder, the end face of the roller, the inner circle, etc.
Patent No. CN108005901A describes a structure of lubricating roller end face, in which an oil groove connected with a suction cavity on a lower flange is intermittently opened and closed along with the rotation of the roller, so as to guide the oil in the oil pool into a cylinder working cavity for lubricating and sealing. But because of the low back pressure in the shell, the oiling is limited, and the effective lubrication of the end surface, the inner circle and the crankshaft part of the roller is difficult to realize.
Disclosure of Invention
One of the objectives of the present invention is to provide a low back pressure rolling rotor compressor, which can avoid the defects in the prior art, and can solve the problems that the pressure of the central part (the roller end surface, the inner circle, and the crankshaft part) is slightly higher than the low pressure in the shell due to the low pressure in the shell and the high pressure in the working cavity, and the high pressure leaks through the roller end surface, so that the central part of the pump body is difficult to oil, and is in an oil-deficient or oil-deficient state, and the friction pair of the central part is difficult to realize effective lubrication and sealing, resulting in heavy wear, poor reliability, and low performance.
The purpose of the invention is realized by the following technical scheme:
the low-backpressure rolling rotor type compressor comprises a shell, wherein a cylinder assembly is fixed inside the shell, an oil cylinder assembly is fixed inside the shell and positioned at the bottom of the cylinder assembly, a crankshaft is fixed on the cylinder assembly and the oil cylinder assembly, the inside of the oil cylinder assembly is communicated with an oil pool at the bottom of the shell, a first oil discharge channel communicated with the inside of the oil cylinder assembly is formed in the cylinder assembly, and the first oil discharge channel is communicated with the center of a pump body of the cylinder assembly. The oil cylinder assembly is fixed at the bottom of the air cylinder assembly, the oil cylinder assembly is communicated with the oil pool at the bottom of the shell, meanwhile, a first oil discharge channel which is communicated with the inside of the oil cylinder assembly and the inside of the air cylinder assembly is formed in the air cylinder assembly, lubricating oil which is extracted from the oil pool by the oil cylinder assembly is sent to the central part of a pump body of the air cylinder assembly to be lubricated, and finally, the lubricating oil returns to the oil pool through a short shaft gap of a crankshaft, so that the oil supply difficulty and poor lubrication of the low-backpressure compressor are solved, and the reliability of the compressor is improved; meanwhile, the crankshaft does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the quality of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.
Furthermore, a lower flange is fixed between the cylinder assembly and the oil cylinder assembly, a second oil discharge channel is formed in the lower flange, and two ends of the second oil discharge channel are respectively communicated with the inside of the oil cylinder assembly and the first oil discharge channel. Through fixing the lower flange between cylinder assembly and oil cylinder assembly to set up the inside of intercommunication oil cylinder assembly and the second oil extraction passageway of first oil extraction passageway on the lower flange, make the second oil extraction passageway be located the terminal surface matched with bearing end face of lower flange and oil cylinder assembly simultaneously, can strengthen the lubrication and the sealing to the terminal surface of oil cylinder assembly, improve reliability and performance.
Furthermore, a partition plate is fixed between the oil cylinder assembly and the lower flange, a third oil discharge channel is formed in the partition plate, and two ends of the third oil discharge channel are communicated with the inside of the oil cylinder assembly and the second oil discharge channel respectively. A partition plate is fixed between the oil cylinder assembly and the lower flange and can partition the oil cylinder assembly from the lower flange, and meanwhile a third oil discharge channel communicated with the inside of the oil cylinder assembly and the second oil discharge channel is formed in the partition plate, so that lubricating oil in the oil cylinder assembly can enter the second oil discharge channel.
Furthermore, an upper flange is fixed at the top of the cylinder assembly, a fourth oil discharge channel is formed in the upper flange, and two ends of the fourth oil discharge channel are respectively communicated with the first oil discharge channel and the central part of the pump body of the cylinder assembly. The upper flange is fixed at the top of the air cylinder assembly, the fourth oil discharge channel communicated with the first oil discharge channel and the center of the pump body of the air cylinder assembly is arranged on the upper flange, and the fourth oil discharge channel is positioned on the end face matched bearing end face of the upper flange and the end face matched bearing end face of the air cylinder assembly, so that the lubrication and the sealing of the end face of the air cylinder assembly can be enhanced, and the reliability and the performance are improved.
Furthermore, oil way grooves are formed in the portions, located inside the cylinder assembly and inside the oil cylinder assembly, of the crankshaft along the axial direction of the crankshaft. The crankshaft is respectively positioned in the cylinder assembly and the oil cylinder assembly, and is provided with an oil way groove along the axial direction of the crankshaft, the oil way groove can ensure that lubricating oil entering the central part of the pump body of the cylinder assembly can smoothly flow into the central part of the pump body of the oil cylinder assembly and flows back to the oil pool from the central part of the pump body of the oil cylinder assembly, so that a circulating lubricating oil way is formed.
Furthermore, the oil cylinder assembly comprises an oil cylinder, and a lower roller and a lower sliding sheet which are arranged inside the oil cylinder. The oil cylinder assembly comprises an oil cylinder, a lower roller and a lower sliding sheet which are arranged inside the oil cylinder, and lubricating oil in the oil pool is sent into the third oil discharge channel by utilizing suction force generated by compression of the lower roller and the lower sliding sheet inside the oil cylinder.
Further, an oil cylinder cover is fixed at the bottom of the oil cylinder, and an oil guide pipe which is communicated with the inside of the oil cylinder and an oil pool at the bottom of the shell is fixed on the oil cylinder cover. The oil cylinder cover fixed at the bottom of the oil cylinder plays a role of sealing the oil cylinder and prevents lubricating oil entering the oil cylinder from flowing back to the oil pool, and the oil guide pipe fixed on the oil cylinder cover and used for communicating the inside of the oil cylinder with the oil pool at the bottom of the shell is used for communicating the inside of the oil cylinder with the oil pool and extracting the lubricating oil from the oil pool when the oil cylinder generates suction.
Further, the cylinder assembly comprises a cylinder, and an upper roller and an upper sliding sheet which are arranged in the cylinder. The cylinder component comprises a cylinder, an upper roller and an upper slide sheet which are arranged inside the cylinder, and is used for realizing refrigerant compression.
Further, the bent axle is provided with a motor assembly, and the motor assembly is fixed on the inner side wall of the shell. The bent axle is provided with motor element, and motor element fixes on the inside wall of casing, and motor element is used for driving cylinder assembly and the operation of oil cylinder subassembly.
The invention has the beneficial effects that: the invention discloses a low-backpressure rolling rotor type compressor, which comprises a shell, wherein a cylinder assembly is fixed inside the shell, an oil cylinder assembly is fixed inside the shell and positioned at the bottom of the cylinder assembly, a crankshaft is fixed on the cylinder assembly and the oil cylinder assembly, the inside of the oil cylinder assembly is communicated with an oil pool at the bottom of the shell, the cylinder assembly is provided with a first oil discharge channel communicated with the inside of the oil cylinder assembly, and the first oil discharge channel is communicated with the central part of a pump body of the cylinder assembly. The oil cylinder assembly is fixed at the bottom of the air cylinder assembly, the oil cylinder assembly is communicated with the oil pool at the bottom of the shell, the first oil discharge channel which is communicated with the inside of the oil cylinder assembly and the inside of the air cylinder assembly is arranged on the air cylinder assembly, lubricating oil which is extracted from the oil pool by the oil cylinder assembly is sent to the central part of the pump body of the air cylinder assembly to be lubricated, and finally returns to the oil pool through the short shaft gap of the crankshaft, so that the oil supply difficulty and poor lubrication of the low-backpressure compressor are solved, and the reliability of the compressor is improved; meanwhile, the crankshaft does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the quality of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.
The second purpose of the invention is to provide an air conditioner which avoids the defects in the prior art, the air conditioner uses the low-backpressure rolling rotor compressor, because the oil cylinder assembly is fixed at the bottom of the air cylinder assembly, the oil cylinder assembly is communicated with the oil sump at the bottom of the shell, and the air cylinder assembly is provided with a first oil discharge channel which is communicated with the inside of the oil cylinder assembly and the inside of the air cylinder assembly, the lubricating oil which is extracted from the oil sump by the oil cylinder assembly is sent to the central part of the pump body of the air cylinder assembly to lubricate the central part, and finally, the lubricating oil returns to the oil sump from the short shaft gap of the crankshaft, thereby solving the problems of difficult oil supply and poor lubrication of the low-backpressure compressor and improving the reliability of the compressor; meanwhile, the crankshaft does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the quality of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a sectional view showing the overall construction of a low back pressure rolling rotor type compressor of the present invention.
Fig. 2 is a lower half sectional view of a low back pressure rolling rotor compressor of the present invention.
Fig. 3 is a half sectional view of a lower flange structure of a low back pressure rolling rotor type compressor of the present invention.
Fig. 4 is a schematic view of the diaphragm structure of a low back pressure rolling rotor compressor of the present invention.
Fig. 5 is a schematic view of the upper flange and cylinder structure of a low back pressure rolling rotor compressor of the present invention.
Fig. 6 is a half sectional view showing the structure of an upper flange of a low back pressure rolling rotor type compressor of the present invention.
Fig. 7 is a schematic view of the lower half of the crankshaft of a low back pressure rolling rotor compressor of the present invention.
Fig. 8 is a schematic view of the structure of the oil cylinder and the oil cylinder cover of the low back pressure rolling rotor compressor of the present invention.
The figure includes:
the oil cylinder comprises a shell 1, an air cylinder assembly 2, an oil cylinder assembly 3, a crankshaft 4, an oil pool 5, a first oil discharge channel 6, a lower flange 7, a second oil discharge channel 8, a partition plate 9, a third oil discharge channel 10, an upper flange 11, a fourth oil discharge channel 12, an oil circuit groove 13, an oil cylinder 14, a lower roller 15, a lower sliding sheet 16, an oil cylinder cover 17, an oil guide pipe 18, an air cylinder 19, an upper roller 20, an upper sliding sheet 21 and a motor assembly 22.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
As shown in fig. 1 to 8, the low back pressure rolling rotor compressor of this embodiment includes a housing 1, a cylinder assembly 2 is fixed inside the housing 1, an oil cylinder assembly 3 is fixed inside the housing 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, an oil sump 5 at the bottom of the housing 1 is communicated with the inside of the oil cylinder assembly 3, a first oil discharge passage 6 communicated with the inside of the oil cylinder assembly 3 is formed in the cylinder assembly 2, and the first oil discharge passage 6 is communicated with a central portion of a pump body of the cylinder assembly 2. The oil cylinder assembly 3 is fixed at the bottom of the air cylinder assembly 2, the oil cylinder assembly 3 is communicated with the oil pool 5 at the bottom of the shell 1, meanwhile, the air cylinder assembly 2 is provided with the first oil discharge channel 6 which is communicated with the inside of the oil cylinder assembly 3 and the inside of the air cylinder assembly 2, lubricating oil which is extracted from the oil pool 5 by the oil cylinder assembly 3 is sent to the central part of a pump body of the air cylinder assembly 2 to lubricate the central part, and finally returns to the oil pool 5 from a short shaft gap of the crankshaft 4, so that the oil supply difficulty and poor lubrication of the low-back-pressure compressor are solved, and the reliability of the compressor is improved; meanwhile, the crankshaft 4 does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the mass of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.
A lower flange 7 is fixed between the cylinder assembly 2 and the oil cylinder assembly 3, a second oil discharge channel 8 is formed in the lower flange 7, and two ends of the second oil discharge channel 8 are respectively communicated with the inside of the oil cylinder assembly 3 and the first oil discharge channel 6. Through fixing the lower flange 7 between the cylinder assembly 2 and the oil cylinder assembly 3, and set up the inside of intercommunication oil cylinder assembly 3 and the second oil drain channel 8 of first oil drain channel 6 on the lower flange 7, make the second oil drain channel 8 be located the terminal surface matched with bearing end face of lower flange 7 and oil cylinder assembly 3 simultaneously, can strengthen the lubrication and the sealing to the terminal surface of oil cylinder assembly 3, improve reliability and performance. Correspondingly, in order to better lubricate the inner side walls of the crankshaft 4 and the lower flange 11 on which the crankshaft 4 is mounted, a straight oil groove can be formed on the inner side wall of the lower flange 7 on which the crankshaft 4 is mounted.
A partition plate 9 is fixed between the oil cylinder assembly 3 and the lower flange 7, a third oil discharge channel 10 is formed in the partition plate 9, and two ends of the third oil discharge channel 10 are respectively communicated with the inside of the oil cylinder assembly 3 and the second oil discharge channel 8. A partition plate 9 is fixed between the cylinder assembly 3 and the lower flange 7, the partition plate 9 can partition the cylinder assembly 3 from the lower flange 7, and meanwhile, a third oil discharge channel 10 which is communicated with the inside of the cylinder assembly 3 and the second oil discharge channel 8 is formed in the partition plate 9, so that lubricating oil in the cylinder assembly 3 can enter the second oil discharge channel 8.
An upper flange 11 is fixed at the top of the cylinder assembly 3, a fourth oil discharge channel 12 is formed in the upper flange 11, and two ends of the fourth oil discharge channel 12 are respectively communicated with the first oil discharge channel 6 and the central part of the pump body of the cylinder assembly 2. Through fixing the upper flange 11 at the top of the cylinder assembly 2, and set up the fourth oil drain channel 12 that communicates the first oil drain channel 6 and the pump body central part of the cylinder assembly 2 on the upper flange 11, make the fourth oil drain channel 12 be located the terminal surface of the matched with bearing of terminal surface of the upper flange 11 and cylinder assembly 2 simultaneously, can strengthen the lubrication and the sealing to the terminal surface of the cylinder assembly 2, improve reliability and performance. Correspondingly, in order to better lubricate the crankshaft 4 and the inner side wall of the upper flange 11 for mounting the crankshaft 4, a spiral oil groove can be formed on the inner side wall of the upper flange 11 for mounting the crankshaft 4.
The crankshaft 4 is respectively positioned in the cylinder assembly 2 and the oil cylinder assembly 3, and oil way grooves 13 are formed in the positions along the axial direction of the crankshaft 4. The crankshaft 4 is respectively positioned in the cylinder assembly 2 and the oil cylinder assembly 3, and is provided with an oil way groove 13 along the axial direction of the crankshaft 4, the oil way groove 13 can ensure that lubricating oil entering the central part of the pump body of the cylinder assembly 2 can smoothly flow into the central part of the pump body of the oil cylinder assembly 3 and flows back to the oil pool from the central part of the pump body of the oil cylinder assembly 3, so that a circulating lubricating oil way is formed.
The cylinder assembly 3 comprises a cylinder 14, and a lower roller 15 and a lower slider 16 which are arranged inside the cylinder 14. The oil cylinder assembly 3 comprises an oil cylinder 14, and a lower roller 15 and a lower slide 16 which are arranged inside the oil cylinder 14, and the lubricating oil in the oil pool 5 is sent into the third oil discharge channel 10 by utilizing the suction force generated by the compression of the lower roller 15 and the lower slide 16 inside the oil cylinder 14.
An oil cylinder cover 17 is fixed at the bottom of the oil cylinder 14, and an oil guide pipe 18 which is used for communicating the inside of the oil cylinder 14 with the oil pool 5 at the bottom of the shell 1 is fixed on the oil cylinder cover 17. The oil cylinder cover 17 fixed at the bottom of the oil cylinder 14 plays a role of sealing the oil cylinder 14 and preventing lubricating oil entering the inside of the oil cylinder 14 from flowing back to the oil pool 5, the oil guide pipe 18 fixed on the oil cylinder cover 17 and communicating the inside of the oil cylinder 14 with the oil pool 5 at the bottom of the shell 1 is used for communicating the inside of the oil cylinder 14 with the oil pool 5, and when the oil cylinder 14 generates suction, the lubricating oil can be extracted from the oil pool 5.
The cylinder assembly 2 includes a cylinder 19, and an upper roller 20 and an upper vane 21 disposed inside the cylinder 19. The cylinder assembly 2 includes a cylinder 19, and an upper roller 20 and an upper sliding vane 21 disposed inside the cylinder 19 for compressing a refrigerant.
The crankshaft 4 is provided with a motor assembly 22, and the motor assembly 22 is fixed on the inner side wall of the shell 1. The crankshaft 4 is provided with a motor assembly 22, the motor assembly 22 is fixed on the inner side wall of the shell 1, and the motor assembly 22 is used for driving the cylinder assembly 2 and the oil cylinder assembly 3 to operate.
The working principle is as follows: when the cylinder assembly 2 compresses gas, the crankshaft 4 can drive the lower roller inside the oil cylinder 14 to run simultaneously, 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 oil cylinder cover 17, the low-pressure lubricating oil is compressed by an oil cylinder 14 and then discharged into a third oil discharge channel 10 of a partition plate 9, then sequentially enters a second oil discharge channel 8, a first oil discharge channel 6 and a fourth oil discharge channel 12 from the third oil discharge channel 10, then enters a pump body friction pair lubricating system of the cylinder assembly 2 from the fourth oil discharge channel 12, the lubricating oil fills a fit clearance between an upper roller 20 and a crankshaft 4 and a cylinder 19, then flows into the pump body friction pair lubricating system of the oil cylinder assembly 3 through a clearance of the crankshaft 4 and a first oil way groove 13 on the crankshaft 4, fills a fit clearance between a lower roller 15 and the crankshaft 4 and the oil cylinder 14, and finally flows into an oil pool 5 through a clearance of the crankshaft 4 and a second oil way groove 13 on the crankshaft 4 to form an oil way loop.
Example 2
In the present embodiment, the low back pressure rolling rotor compressor described in embodiment 1 is used, because the cylinder assembly 3 is fixed at the bottom of the cylinder assembly 2, the cylinder assembly 3 is communicated with the oil sump 5 at the bottom of the housing 1, and the cylinder assembly 2 is provided with the first oil discharge passage 6 communicating the inside of the cylinder assembly 3 and the inside of the cylinder assembly 2, the lubricating oil pumped from the oil sump 5 by the cylinder assembly 3 is sent to the central part of the pump body of the cylinder assembly 2 to lubricate the central part, and finally returns to the oil sump 5 from the short shaft gap of the crankshaft 4, the oil supply difficulty and poor lubrication of the low back pressure compressor are solved, and the reliability of the compressor is improved; meanwhile, the crankshaft 4 does not need to be provided with a central oil hole and the design of an upper eccentric part and a lower eccentric part, the mass of a motor balance block is reduced, and the stability and the reliability of single-cylinder compression are improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A low back pressure rolling rotor compressor, includes the casing, the inside of casing is fixed with the cylinder assembly, its characterized in that: an oil cylinder assembly is fixed inside the shell and at the bottom of the oil cylinder assembly, a crankshaft is fixed on the oil cylinder assembly and the oil cylinder assembly, the inside of the oil cylinder assembly is communicated with an oil pool at the bottom of the shell, a first oil discharge channel communicated with the inside of the oil cylinder assembly is formed in the oil cylinder assembly, and the first oil discharge channel is communicated with the center of a pump body of the oil cylinder assembly.
2. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: and a lower flange is fixed between the air cylinder assembly and the oil cylinder assembly, a second oil discharge channel is formed in the lower flange, and two ends of the second oil discharge channel are respectively communicated with the inside of the oil cylinder assembly and the first oil discharge channel.
3. A low back pressure rolling rotor compressor as claimed in claim 2 wherein: and a partition plate is fixed between the oil cylinder assembly and the lower flange, a third oil discharge channel is formed in the partition plate, and two ends of the third oil discharge channel are communicated with the inside of the oil cylinder assembly and the second oil discharge channel respectively.
4. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: an upper flange is fixed at the top of the air cylinder assembly, a fourth oil discharge channel is formed in the upper flange, and two ends of the fourth oil discharge channel are respectively communicated with the first oil discharge channel and the center of the pump body of the air cylinder assembly.
5. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: the crankshaft is respectively positioned in the cylinder assembly and the oil cylinder assembly, and oil way grooves are formed in the parts of the crankshaft in the axial direction of the crankshaft.
6. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: the oil cylinder assembly comprises an oil cylinder, and a lower roller and a lower sliding sheet which are arranged in the oil cylinder.
7. A low back pressure rolling rotor compressor as claimed in claim 2 wherein: an oil cylinder cover is fixed at the bottom of the oil cylinder, and an oil guide pipe which is communicated with the inside of the oil cylinder and an oil pool at the bottom of the shell is fixed on the oil cylinder cover.
8. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: the cylinder component comprises a cylinder, and an upper roller and an upper sliding sheet which are arranged in the cylinder.
9. A low back pressure rolling rotor compressor as claimed in claim 1 wherein: the bent axle is provided with motor element, motor element fixes on the inside wall of casing.
10. An air conditioner, characterized in that: comprising a low back pressure rolling rotor compressor according to any one of claims 1 to 9.
CN201911322334.XA 2019-12-20 2019-12-20 Low-backpressure rolling rotor type compressor and air conditioner Pending CN110925211A (en)

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CN110925211A true CN110925211A (en) 2020-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115163492A (en) * 2022-08-16 2022-10-11 广东美芝制冷设备有限公司 Pump body subassembly, piston compressor and refrigeration plant
CN115217760A (en) * 2021-10-15 2022-10-21 广州市德善数控科技有限公司 Low pressure chamber rotary compressor and air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115217760A (en) * 2021-10-15 2022-10-21 广州市德善数控科技有限公司 Low pressure chamber rotary compressor and air conditioner
CN115163492A (en) * 2022-08-16 2022-10-11 广东美芝制冷设备有限公司 Pump body subassembly, piston compressor and refrigeration plant

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