Rotary compressor and refrigeration cycle system
阅读说明:本技术 旋转压缩机和制冷循环系统 (Rotary compressor and refrigeration cycle system ) 是由 小津政雄 王玲 梁自强 于 2020-06-18 设计创作,主要内容包括:本发明公开了一种旋转压缩机和制冷循环系统,所述旋转压缩机包括机壳、电机、压缩机构和供油通路,机壳内具有润滑油,电机具有曲轴,曲轴包括第一偏心部、第二偏心部和连接部,压缩机构由曲轴驱动,压缩机构包括气缸和活塞,气缸包括第一气缸和第二气缸,第一气缸和第二气缸之间设有隔板,隔板设有中心腔,连接部配合在中心腔内,偏心部配合在活塞内以带动活塞偏心旋转,供油通路连通机壳的内部空间和中心腔,用于在中心腔内压力变化时将机壳内的润滑油通入所述中心腔内。本发明的旋转压缩机可以将润滑油引流至中心腔内,从而将中心腔内的高压气体排出,进而避免高压气体通过活塞与中心腔之间的滑动间隙排入压缩腔内,提高旋转压缩机的制冷量。(The invention discloses a rotary compressor and a refrigeration cycle system, the rotary compressor comprises a shell, a motor, a compression mechanism and an oil supply passage, lubricating oil is arranged in the shell, the motor is provided with a crankshaft, the crankshaft comprises a first eccentric part, a second eccentric part and a connecting part, the compression mechanism is driven by the crankshaft, the compression mechanism comprises an air cylinder and a piston, the air cylinder comprises a first air cylinder and a second air cylinder, a partition plate is arranged between the first air cylinder and the second air cylinder, the partition plate is provided with a central cavity, the connecting part is matched in the central cavity, the eccentric part is matched in the piston to drive the piston to eccentrically rotate, and the oil supply passage is communicated with the inner space and the central cavity of the shell and is used for introducing the lubricating oil in the shell into the central cavity when the pressure. The rotary compressor can guide the lubricating oil into the central cavity, so that the high-pressure gas in the central cavity is discharged, the high-pressure gas is prevented from being discharged into the compression cavity through the sliding gap between the piston and the central cavity, and the refrigerating capacity of the rotary compressor is improved.)
1. A rotary compressor, comprising:
a housing having a lubricant therein;
the motor is arranged in the shell and is provided with a crankshaft, and the crankshaft comprises a first eccentric part, a second eccentric part and a connecting part connected between the first eccentric part and the second eccentric part; and
a compression mechanism disposed in the housing and driven by the crankshaft, the compression mechanism comprising:
the cylinder comprises a first cylinder and a second cylinder, the first cylinder is provided with a first cylinder chamber, the second cylinder is provided with a second cylinder chamber, a partition plate is arranged between the first cylinder and the second cylinder, the partition plate is provided with a central cavity which penetrates through the partition plate along the axial direction of the crankshaft, and the connecting part is matched in the central cavity;
a piston including a first piston and a second piston, the first eccentric portion being fitted within the first piston to cause eccentric rotation of the first piston within the first cylinder chamber, the second eccentric portion being fitted within the second piston to cause eccentric rotation of the second piston within the second cylinder chamber;
the oil supply passage is communicated with the inner space of the shell and the central cavity and is used for introducing lubricating oil in the shell into the central cavity when the pressure in the central cavity changes.
2. The rotary compressor of claim 1, wherein the oil supply passage is an oil supply pipe, the partition plate is provided with a through hole communicating with the central cavity, one end of the oil supply pipe is adapted to be inserted into the lubricating oil in the casing, and the other end of the oil supply pipe communicates with the central cavity through the through hole.
3. The rotary compressor of claim 1, wherein the compression mechanism further comprises a first bearing disposed at a top of the first cylinder and a second bearing disposed at a bottom of the second cylinder, the crankshaft being rotatably supported by the first and second bearings.
4. The rotary compressor of claim 3, wherein the crankshaft further comprises a main shaft and a counter shaft, the first eccentric portion, the second eccentric portion and the connecting portion being provided between the main shaft and the counter shaft, a lower end of the main shaft being fitted within the first bearing, the counter shaft being fitted within the second bearing.
5. The rotary compressor of claim 4, wherein the crankshaft has a longitudinal hole extending from a lower end face of the auxiliary shaft in an axial direction of the auxiliary shaft and to the main shaft, the compression mechanism further comprising a propeller fitted in the longitudinal hole and a pump provided at a lower end of the auxiliary shaft and opposed to the longitudinal hole for pumping the lubricating oil in the casing into the longitudinal hole.
6. The rotary compressor of claim 5, wherein at least one of the lower end of the main shaft, the first eccentric portion, the connecting portion, the second eccentric portion, and the sub shaft is provided with an oil supply hole, the oil supply hole communicating with the longitudinal hole.
7. The rotary compressor according to claim 6, wherein an inner peripheral surface of the first bearing is provided with a first spiral groove spirally extending in an axial direction of the crankshaft, an outer peripheral surface of the first eccentric portion is provided with a first longitudinal groove extending in the axial direction of the crankshaft, and both the first longitudinal groove and the first spiral groove communicate with the oil supply hole; and/or the presence of a gas in the gas,
the inner circumferential surface of the second bearing is provided with a second spiral groove spirally extending along the axial direction of the crankshaft, the outer circumferential surface of the second eccentric part is provided with a second longitudinal groove extending along the axial direction of the crankshaft, and the second longitudinal groove and the second spiral groove are both communicated with the oil supply hole.
8. The rotary compressor of any one of claims 1-7, wherein an inner diameter of the central bore is equal to or greater than an outer diameter of the first eccentric portion and an inner diameter of the central bore is equal to or greater than an outer diameter of the second eccentric portion.
9. The rotary compressor of any one of claims 1 to 7, wherein the compression mechanism further comprises:
the sliding vane comprises a first sliding vane and a second sliding vane, the first cylinder is internally provided with a first sliding vane groove, the first sliding vane can move in the first sliding vane groove in a reciprocating mode, the front end portion of the first sliding vane is abutted against the outer peripheral surface of the first piston so as to divide the first cylinder chamber into a first suction chamber and a first compression chamber, the second cylinder is internally provided with a second sliding vane groove, the second sliding vane can move in the second sliding vane groove in a reciprocating mode, and the front end portion of the second sliding vane is abutted against the outer peripheral surface of the second piston so as to divide the second cylinder chamber into a second suction chamber and a second compression chamber.
10. The rotary compressor of claim 9, wherein the compression mechanism further comprises:
the elastic piece comprises a first elastic piece and a second elastic piece, the first elastic piece faces the first piston to press the first sliding piece so that the front end portion of the first sliding piece is abutted to the outer peripheral face of the first piston, and the second elastic piece faces the second piston to press the second sliding piece so that the front end portion of the second sliding piece is abutted to the outer peripheral face of the second piston.
11. A refrigeration cycle system comprising a compressor, a condenser, an expansion valve, an evaporator and an accumulator, the compressor being a rotary compressor according to any one of claims 1 to 10.
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to a rotary compressor and a refrigeration cycle system.
Background
Rotary compressors typically include a casing, a motor assembly and a compression mechanism, wherein the slide of the compression mechanism reciprocates in a slide groove of the cylinder, a spring is provided at the rear end of the slide, the spring presses the slide, whereby the front end of the slide abuts the outer peripheral surface of the piston in the compression chamber.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
Drawings
Fig. 1 is a schematic view of a refrigeration cycle system according to an embodiment of the present invention, in which a longitudinal section of a rotary compressor according to an embodiment of the present invention is shown.
Fig. 2 is a sectional view of a rotary compressor according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view taken along fig. 1.
Fig. 4 is a graph of a cooling capacity of a rotary compressor according to an embodiment of the present invention as a function of a capacity of lubricating oil.
Reference numerals:
a rotary compressor 1;
a
a motor 20; a crankshaft 201; the first
the second eccentric portion 2012; a connecting
a compression mechanism 30; a first cylinder 3011; a
a first bearing 302; a first spiral groove 3021; a second bearing 303; the second spiral groove 3031; a propeller 304; a pump 305; a
a
an
a condenser 70; an expansion valve 701; an evaporator 702; a reservoir 703; an exhaust pipe 704; a suction duct 705; a first exhaust aperture 706; a second vent 707; a muffler 708.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A rotary compressor 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a rotary compressor 1 according to an embodiment of the present invention includes a
The motor 20 has a crankshaft 201, and the crankshaft 201 includes a first
The compression mechanism 30 is provided in the
The compression mechanism 30 includes a cylinder including a first cylinder 3011 and a second cylinder 3013, the first cylinder 3011 having a first chamber, the second cylinder 3013 having a second chamber, a partition 3015 provided between the first cylinder 3011 and the second cylinder 3013, the partition 3015 having a
As shown in fig. 2, the compressing mechanism 30 is located below the motor 20, the first cylinder 3011 and the second cylinder 3013 are spaced apart from each other in the vertical direction in the
The pistons include a
The
The inventor finds that, in order to enable the crankshaft 201 to be inserted into the
Therefore, according to the rotary compressor provided by the embodiment of the invention, the lubricating oil can be guided into the central cavity by arranging the oil supply passage which is communicated with the inner space of the shell and the central cavity, so that the high-pressure gas in the central cavity is discharged, the high-pressure gas is further prevented from being discharged into the compression cavity through the sliding gap between the piston and the central cavity, and the refrigerating capacity of the rotary compressor is improved.
In some embodiments, as shown in fig. 2, the
As shown in fig. 2, lubricating oil is stored in the bottom of
In addition, as shown in fig. 4, when the capacity of the lubricant oil in the
In some embodiments, as shown in fig. 2, the compression mechanism 30 further includes a first bearing 302 and a second bearing 303, the first bearing 302 being provided at the top of the first cylinder 3011, the second bearing 303 being provided at the bottom of the second cylinder 3013, and the crankshaft 201 being rotatably supported by the first bearing 302 and the second bearing 303. As shown in fig. 2, the first bearing 302 and the second bearing 303 are both sleeved on the crankshaft 201, the first bearing 302 is connected to the upper surface of the first cylinder 3011 to seal the compression cavity of the first cylinder 3011, and the second bearing 303 is connected to the lower surface of the second cylinder 3013 to seal the compression cavity of the second cylinder 3013.
In some embodiments, as shown in fig. 2, crankshaft 201 further includes a main shaft 2014 and a sub-shaft 2015, a first
As shown in fig. 2, the upper end of the connecting
In some embodiments, as shown in fig. 2, the crankshaft 201 has a longitudinal hole 2016, the longitudinal hole 2016 extending from a lower end surface of the auxiliary shaft 2015 in the axial direction of the auxiliary shaft 2015 and to the main shaft 2014, the compression mechanism 30 further includes a propeller 304 and a pump 305, the propeller 304 being fitted in the longitudinal hole 2016, the pump 305 being provided at a lower end of the auxiliary shaft 2015 and opposite to the longitudinal hole 2016 for pumping the lubricating oil 305 in the
As shown in fig. 2, the pump 305 is located in the lubricant oil at the bottom inside the
In some embodiments, as shown in fig. 2, at least one of the lower end of the main shaft 2014, the first
Specifically, an oil supply hole 2019 can be formed in the structural component needing to be lubricated according to actual requirements, so that lubricating oil in the longitudinal hole 2016 can be led out. As shown in fig. 2, oil supply holes 2019 are provided in the lower end of the main shaft 2014, the first
In some embodiments, as shown in fig. 2, the inner circumferential surface of the first bearing 302 is provided with a first spiral groove 3021 that extends spirally in the axial direction of the crankshaft 201, the outer circumferential surface of the first
As shown in fig. 2, the first bearing 302 is provided with a plurality of first spiral grooves 3021 on an inner circumferential surface thereof, the first spiral grooves 3021 being spaced apart in the vertical direction, the main shaft 2014 is provided with an oil supply hole 2019, and the oil supply hole 2019 communicates with the plurality of first spiral grooves 3021, so that the plurality of first spiral grooves 3021 are filled with lubricating oil, and when the crankshaft 201 rotates, the lubricating oil in the first spiral grooves 3021 may be wiped on the surface of the crankshaft 201, so that the crankshaft 201 is in lubricating contact with the inner circumferential surface of the first bearing 302.
First
Further, as shown in fig. 2, the inner circumferential surface of the second bearing 303 is provided with a second helical groove 3031 extending helically in the axial direction of the crankshaft 201, the outer circumferential surface of the second eccentric portion 2012 is provided with a second longitudinal groove extending in the axial direction of the crankshaft 201, and the second helical groove 3031 and the second longitudinal groove are both communicated with the oil supply hole 2019. Thus, lubricating oil is injected into both the second helical groove 3031 and the second longitudinal groove, so that the second eccentric portion 2012 is in lubricating contact with the second piston 502, and the second bearing 303 is in lubricating contact with the crankshaft 201.
In some embodiments, as shown in fig. 2, the inner diameter of the
In some embodiments, as shown in fig. 2 and 3, the compression mechanism 30 further includes a slide piece including a
As shown in fig. 2 and 3, the
As shown in fig. 3, the
The second cylinder 3013 has a groove for a second slide piece 3062, the second slide piece 3062 is reciprocatingly movable in the groove for the second slide piece 3062, and the distal end of the second slide piece 3062 abuts against the outer circumferential surface of the second piston 502 to divide the second cylinder chamber into a second suction chamber and a second compression chamber 3014. It will be appreciated that the assembly of the second sliding piece 3062 and the mating movement with the second piston 502 is the same as the assembly of the first sliding
Further, as shown in fig. 3, the compression mechanism 30 further includes an elastic member including a first
Specifically, as shown in fig. 3, an outer end of the first
In the second cylinder 3013, the second elastic member presses the second slide piece 3062 toward the second piston 502 so that the tip end portion of the second slide piece 3062 abuts against the outer circumferential surface of the second piston 502. Whereby the relative independence of the second suction chamber from the second compression chamber 3014 can be ensured. In addition, the process of the coupling motion of the second elastic member with the second slide piece 3062 and the process of the coupling motion of the first
A refrigeration cycle system according to an embodiment of the present invention will be described with reference to fig. 1.
A refrigeration cycle system according to another aspect embodiment of the present invention includes a compressor which is a rotary compressor 1 according to an embodiment of the present invention, a condenser 70, an expansion valve 701, an evaporator 702, and an accumulator 703.
As shown in fig. 1, an exhaust pipe 704 is provided on the top of the
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
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