CN105952649B

CN105952649B - Compressor

Info

Publication number: CN105952649B
Application number: CN201610447351.6A
Authority: CN
Inventors: 黎法运; 虞阳波; 杨国用; 杨开成; 高斌; 康晓虎; 曹红军; 刘科种; 叶容君; 夏小鸽
Original assignee: Guangdong Meizhi Compressor Co Ltd; Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd; Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2018-03-23
Anticipated expiration: 2036-06-17
Also published as: CN105952649A

Abstract

The invention discloses a kind of compressor, including：Housing, motor and compression mechanism, the bottom of housing have oil sump；Compression mechanism includes base bearing, cylinder assembly, supplementary bearing, crankshaft and piston, base bearing and supplementary bearing are located at the axial both ends of cylinder assembly, the first end of bent axle is connected with motor, and second end pass through base bearing, cylinder assembly and supplementary bearing, piston is set on bent axle and in the cylinder of cylinder assembly, piston has piston cavity, it is tightly connected between compression mechanism and the internal perisporium of housing so that enclosure interior is separated into the second pressure chamber of first pressure chamber and pressure less than first pressure chamber pressure, motor is located in First pressure chamber room, oil sump is located in second pressure chamber, piston cavity communicates with first pressure chamber, first pressure chamber pressure is the pressure at expulsion of compressor, second pressure chamber pressure is the pressure of inspiration(Pi) of compressor.According to the compressor of the present invention, the volumetric efficiency and efficiency of compressor ensure that.

Description

Compressor

Technical field

The present invention relates to Compressor Technology field, more particularly, to a kind of compressor.

Background technology

In correlation technique, because the oil sump of low back pressure compressor is low pressure so that piston cavity is also low pressure, cylinder exhaust The high pressure refrigerant of chamber discharge is easily leaked to piston inner hole and leaked seriously, so as to cause under low back pressure compressor volumetric efficiency Drop, efficiency are relatively low.Discharge chamber is additionally, since to be arranged in low-pressure shell so that the seal structure complex of discharge chamber, discharge chamber without Method is done greatly, and too small discharge chamber can not then carry out oil, and after Oil-gas Separation, high pressure refrigeration oil can not return to low pressure oil sump, And variable working condition environment can not be adapted to using capillary oil return.

The content of the invention

It is contemplated that at least solves one of technical problem present in prior art.Therefore, one object of the present invention It is to propose a kind of compressor, the volumetric efficiency and efficiency of the compressor are ensured.

According to the compressor of the present invention, including：Housing, the bottom of the housing have oil sump；Motor, the motor are located at In the housing；Compression mechanism, the compression mechanism are located at the side of the neighbouring oil sump of the motor, the compression mechanism Including base bearing, cylinder assembly, supplementary bearing, crankshaft and piston, the base bearing and the supplementary bearing are located at the cylinder assembly Axial both ends, and the base bearing is located at the side of the neighbouring motor of the cylinder assembly, and the cylinder assembly includes Cylinder, the first end of the bent axle are connected with the motor, and the second end of the bent axle passes through the base bearing, the air cylinder group Part and the supplementary bearing, the piston is set on the bent axle and in the cylinder, the piston has piston cavity, It is tightly connected between the internal perisporium of the compression mechanism and the housing so that the enclosure interior is separated into first pressure chamber It is less than the second pressure chamber of the first pressure chamber pressure with pressure, the motor is located in the First pressure chamber room, The oil sump is located in the second pressure chamber, and the piston cavity communicates with the first pressure chamber, first pressure Power chamber pressure is the pressure at expulsion of the compressor, and the second pressure chamber pressure is the pressure of inspiration(Pi) of the compressor.

According to the compressor of the present invention, by setting first pressure chamber and pressure to be less than the of first pressure chamber pressure Two pressure chamber, and piston cavity is communicated with first pressure chamber, it is ensured that the volumetric efficiency and efficiency of compressor.

According to some embodiments of the present invention, the discharge chamber of the cylinder is located in the First pressure chamber room.

Alternatively, clearance seal between the supplementary bearing and the bent axle.

Further, formed with the exhaust outlet communicated with the first pressure chamber, the exhaust outlet position on the housing In the side of the remote compression mechanism of the motor, after the gas mixture of discharge chamber discharge flows through the motor Realize Oil-gas Separation.

According to some embodiments of the present invention, the cylinder has suction muffler, wherein in the compression mechanism formed with The suction passage that the suction muffler communicates, the lubricating oil in the oil sump are suitable to enter the air-breathing by the suction passage Chamber.

According to some embodiments of the present invention, the bent axle has eccentric part, wherein the piston bush is located at the bias In portion, pushing surface untill a side surface of the neighbouring supplementary bearing of the eccentric part, between the thrust surface and the supplementary bearing Provided with rolling thrust structure so that the friction between the thrust surface and the supplementary bearing is rolling friction.

Further, formed with for accommodating the rolling on a side surface of the neighbouring eccentric part of the supplementary bearing The holding tank of thrust structure.

Alternatively, the rolling thrust structure is ball thrust bearing.

According to some embodiments of the present invention, formed with for by the first pressure chamber and described on the base bearing The communicating passage of piston cavity connection, the communicating passage include：Connectivity slot, the connectivity slot form the neighbour in the base bearing Extend on one side surface of the nearly motor and along the axial annular of the bent axle；With connect subchannel, the connection subchannel First end connected with the connectivity slot, and it is described connection subchannel the second end connected with the piston cavity.

Further, the compressor further comprises：Shell is collected in oil return, and the oil return collects shell and is located at the base bearing The neighbouring motor a side surface on, the oil return is collected and limits oil return collecting tank between shell and the base bearing, its Described on base bearing formed with the conductive channel communicated with the oil return collecting tank, the lubricating oil in the oil return collecting tank is fitted Enter in by the conductive channel between the base bearing and the bent axle.

According to some embodiments of the present invention, it is tightly connected between the internal perisporium of the base bearing and the housing.

Further, a side surface of the neighbouring motor of the base bearing is provided with sealed frame, the base bearing It is connected by the sealed frame with the housing seal.

Alternatively, boxing connects between the internal perisporium of the sealed frame and the housing.

Further, sealing gasket is provided between the sealed frame and the base bearing.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein：

Fig. 1 is the schematic diagram of compressor according to embodiments of the present invention；

Fig. 2 is the enlarged drawing in the A portions that Fig. 1 centre circles show；

Fig. 3 is the enlarged drawing in the B portions that Fig. 1 centre circles show；

Fig. 4 is the enlarged drawing in the C portions that Fig. 1 centre circles show；

Fig. 5 is the enlarged drawing in the D portions that Fig. 1 centre circles show；

Fig. 6 is another schematic diagram of compressor according to embodiments of the present invention, illustrated therein is the flow direction of lubricating oil；

Fig. 7 is the enlarged drawing in the E portions that Fig. 6 centre circles show.

Reference：

100：Compressor；

1：Housing；11：First pressure chamber；12：Second pressure chamber；

13：Exhaust outlet；14：Reservoir；2：Motor；

3：Base bearing；31：Hub portion；32：Flange portion；321：Connectivity slot；322：Connect subchannel；

4：Cylinder；41：Air intake passage；5：Supplementary bearing；51：Cover plate；

511：First subchannel；52：Second subchannel；53：Suction passage；

54：Holding tank；541：Annular oil groove；

6：Bent axle；61：Eccentric part；611：Thrust surface；7：Piston；71：Piston cavity；

8：Roll thrust structure；9：Shell is collected in oil return；91：Oil return collecting tank.

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.

In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " axle To ", " radial direction ", the orientation of the instruction such as " circumference " or position relationship be based on orientation shown in the drawings or position relationship, be only for It is easy to the description present invention and simplifies description, rather than instruction or implies that signified device or element there must be specific side Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple " are meant that two Individual or two or more.

In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.

Compressor 100 according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 7.Compressor 100 can be vertical pressure Contracting machine.In the description below the application, illustrated so that compressor 100 is vertical compressor as an example.Certainly, the skill of this area Art personnel are appreciated that compressor 100 can also be horizontal compressor.

As shown in figures 1 to 6, such as vertical compressor of compressor 100 according to embodiments of the present invention, including housing 1, electricity Machine 2 and compression mechanism.

The bottom of housing 1 has oil sump.When compressor 100 works, lubricating oil such as refrigeration oil in oil sump is suitable to pair Each kinematic pair of compression mechanism is lubricated, to ensure the normal operation of compression mechanism, so as to extend compressor 100 for example The service life of vertical compressor.

Motor 2 and compression mechanism are each provided in housing 1, and compression mechanism is located at the side of the neighbouring oil sump of motor 2, such as Fig. 1 Shown in Fig. 6, motor 2 is located at the top in housing 1, and compression mechanism is located at the bottom in housing 1.

Compression mechanism includes base bearing 3, cylinder assembly, supplementary bearing 5, bent axle 6 and piston 7, specifically, the He of base bearing 3 Supplementary bearing 5 is located at the axial both ends (for example, top and bottom in Fig. 1 and Fig. 6) of cylinder assembly, and base bearing 3 is located at cylinder The side (for example, upside in Fig. 1 and Fig. 6) of the neighbouring motor 2 of component.Cylinder assembly includes cylinder 4, and cylinder 4 has air-breathing Chamber and discharge chamber, suction muffler are used to suck from refrigerant to be compressed (such as low-temp low-pressure refrigerant), and discharge chamber is used to treat compression refrigerant It is compressed and discharges the refrigerant (such as HTHP refrigerant) after compression.

The first end (for example, upper end in Fig. 1 and Fig. 6) of bent axle 6 is connected with motor 2, and the second end of bent axle 6 is (for example, figure Lower end in 1 and Fig. 6) pass through base bearing 3, cylinder assembly and supplementary bearing 5.Piston 7 is set on bent axle 6, and piston 7 is located at cylinder It can be rolled in 4 and along the inwall of cylinder 4.When motor 2 works, bent axle 6 rotates is set in piston 7 thereon along cylinder to drive 4 internal perisporium is rolled to be compressed to the refrigerant to be compressed entered in cylinder 4.Piston 7 has piston cavity 71, now lives Plug 7 can be the hollow circular ring shape structure of both ends open.

Cylinder assembly can only include a cylinder 4, and now such as vertical compressor of compressor 100 is single cylinder compressor, Single cylinder compressor is shown in Fig. 1 and Fig. 6 for illustration purposes, but those of ordinary skill is reading following skill After art scheme, it is clearly understood that the skill that the program is applied to the multicylinder compressor with two or more cylinder 4 In art scheme, this is also fallen within protection scope of the present invention.

It is tightly connected between the internal perisporium of compression mechanism and housing 1 so that First pressure chamber room 11 will be separated into inside housing 1 It is less than the second pressure chamber 12 of the pressure of first pressure chamber 11 with pressure, motor 2 is located in first pressure chamber 11, oil sump position In in second pressure chamber 12, the pressure of first pressure chamber 11 is the pressure at expulsion of compressor 100, the pressure of second pressure chamber 12 For the pressure of inspiration(Pi) of compressor 100.Now compression mechanism will be separated into the different higher-pressure region of pressure (the i.e. first pressure inside housing 1 Power chamber 11) and low-pressure area (i.e. second pressure chamber 12).Wherein, the pressure of inspiration(Pi) of compressor 100 is generally from compressor 100 Air entry suction low-temp low-pressure refrigerant pressure, and the pressure at expulsion of compressor 100 generally through compressor 100 compression after The pressure for the HTHP refrigerant discharged from the exhaust outlet 13 of compressor 100.It is understood that low-temp low-pressure refrigerant and compression Specific pressure and temperature of HTHP refrigerant obtained afterwards etc. can specifically be set according to the particular type of compressor 100, Preferably to meet actual requirement.

Wherein, piston cavity 71 communicates with first pressure chamber 11, and the pressure in piston cavity 71 is that pressure at expulsion is (i.e. high Pressure), now the pressure in piston cavity 71 is roughly the same with the pressure in the discharge chamber of cylinder 4, so as to gas exhaust intracavitary High pressure refrigerant is not easy to leak to piston cavity 71, solves leakage caused by traditional low low pressure of back pressure compressor piston cavity 71 Problem.In addition, piston 7 is gentle by its height gap and seal oil piston 7 between base bearing 3 and supplementary bearing 5 Gap between the suction muffler of cylinder 4 prevents the pressure in piston cavity 71 from being leaked to suction muffler.

Such as vertical compressor of compressor 100 according to embodiments of the present invention, by setting first pressure chamber 11 and pressure Power is less than the second pressure chamber 12 of the pressure of first pressure chamber 11, and piston cavity 71 is communicated with first pressure chamber 11, The volumetric efficiency and efficiency of such as vertical compressor of compressor 100 can be ensured.

According to some embodiments of the present invention, the discharge chamber of cylinder 4 is located in first pressure chamber 11, and now discharge chamber is put In the hyperbaric environment of first pressure chamber 11, compared with the sealing structure of low back pressure compressor discharge chamber, according to the present invention's The sealing structure of discharge chamber is greatly simplified, and discharge chamber can do it is relatively large, so as to carry out Oil-gas Separation.

Further, it is located at motor formed with the exhaust outlet 13 communicated with first pressure chamber 11, exhaust outlet 13 on housing 1 The side of 2 remote compression mechanism, for example, as shown in figures 1 to 6, exhaust outlet 13 is formed at the top of housing 1, from discharge chamber The gas mixture of discharge realizes Oil-gas Separation after flowing through motor 2.Specifically, can be straight from the gas mixture of discharge chamber discharge Tap into first pressure chamber 11, and Oil-gas Separation is carried out when flowing through the motor 2 in first pressure chamber 11, the profit isolated Lubricating oil flows downward under the Action of Gravity Field of itself, and high pressure refrigerant then continues up flowing and discharged from exhaust outlet 13.

Alternatively, clearance seal between supplementary bearing 5 and bent axle 6, now the gap between supplementary bearing 5 and bent axle 6 is very small, For example, can be 10 microns -30 microns (including endpoint values), so as to realize capillary throttling action, from the side reflux of motor 2 After the gap between supplementary bearing 5 and bent axle 6 is flowed through, the pressure of lubricating oil can be reduced to and be located at second pressure chamber lubricating oil Pressure in the oil sump of room 12 is suitable.Moreover, lubricating oil is when flowing through the gap between supplementary bearing 5 and bent axle 6, not only to supplementary bearing 5 and bent axle 6 play a part of lubrication, while also further ensure the sealing between supplementary bearing 5 and bent axle 6.

According to some embodiments of the present invention, the suction passage that is communicated in compression mechanism formed with the suction muffler with cylinder 4 53, the lubricating oil in oil sump is suitable to enter suction muffler by suction passage 53.Specifically, reference picture 6 and Fig. 7, countershaft are combined The one end for holding 5 remote cylinder 4 is provided with cover plate 51, and suction passage 53 includes forming the He of the first subchannel 511 on cover plate 51 The second subchannel 52 for being formed on supplementary bearing 5 and being connected with the first subchannel 511, the second subchannel 52 is with forming in cylinder 4 Above and with the air intake passage 41 of suction muffler connection communicate, thus, when compressor 100 works, will can be flowed in breathing process In the suction muffler of lubricating oil suction cylinder 4 in refrigerant and oil sump through reservoir 14, specifically, refrigerant passes through air intake passage 41 Into suction muffler, lubricating oil flows through the first subchannel 511, the second subchannel 52 successively, then enters air-breathing by air intake passage 41 Chamber, to lubricate and seal each kinematic pair.

According to some embodiments of the present invention, reference picture 1 simultaneously combines Fig. 2, and bent axle 6 has eccentric part 61, wherein 7 sets of piston It is located on eccentric part 61, a side surface (for example, lower surface in Fig. 1 and Fig. 2) for the neighbouring supplementary bearing 5 of eccentric part 61 is thrust Face 611, it is provided between thrust surface 611 and supplementary bearing 5 and rolls thrust structure 8 so that friction between thrust surface 611 and supplementary bearing 5 For rolling friction.Alternatively, it is ball thrust bearing to roll thrust structure 8, but not limited to this.Due to the He of first pressure chamber 11 The presence of the height pressure difference of second pressure chamber 12, bent axle 6 can compress the upper surface of supplementary bearing 5, cause frictional resistance to increase, because This is set between the above-mentioned thrust surface 611 and supplementary bearing 5 of the eccentric part 61 of bent axle 6 rolls thrust structure 8 such as ball thrust shaft Hold, the sliding friction between thrust surface 611 and supplementary bearing 5 is transformed into rolling friction, with reducing friction resistance.Bent axle 6 with Supplementary bearing 5 coordinate partially pass through roll thrust structure 8 such as ball thrust bearing endoporus, and with the gap of supplementary bearing 5 coordinate with Sliding bearing is formed, bears radial load.Because piston cavity 71 is high pressure, above-mentioned second end of bent axle 6 is low pressure, therefore Lubricating oil is by between the cooperation from piston cavity 71 by rolling thrust structure 8, bent axle 6 and supplementary bearing 5 in the presence of the pressure difference of both sides Clearance flow rolls the lubrication of the sliding bearing that thrust structure 8, bent axle 6 and supplementary bearing 5 are formed and cold to low pressure oil sump, so as to realize But.

Further, shape on a side surface (for example, upper surface in Fig. 1 and Fig. 2) for the neighbouring eccentric part 61 of supplementary bearing 5 Into the holding tank 54 having for accommodating rolling thrust structure 8, for example, as depicted in figs. 1 and 2, holding tank 54 can be by supplementary bearing 5 The part of upper surface be downwardly concaved to be formed, and holding tank 54 directly connects with the endoporus coordinated with bent axle 6 of supplementary bearing 5, Rolling thrust structure 8 such as ball thrust bearing can be directly placed in the holding tank 54, certainly, two of ball thrust bearing Thrust washer can also be respectively with thrust surface 611 and holding tank 54 inwall fix.

Further, as shown in Fig. 2 annular formed with the circumferentially extending along supplementary bearing 5 on the bottom wall of holding tank 54 Oil groove 541, the interior storage lubricating oil that is suitable to of annular oil groove 541 is with normal lubricated balls thrust bearing.

According to some embodiments of the present invention, reference picture 1 simultaneously combines Fig. 3, formed with for by first pressure on base bearing 3 The communicating passage that chamber 11 connects with piston cavity 71, thus, it is possible to the pressure being effectively ensured in piston cavity 71 be high pressure (i.e. It is substantially the same with the pressure of first pressure chamber 11).Specifically, communicating passage includes：Connectivity slot 321 with connect subchannel 322, connectivity slot 321 is formed on a side surface of the neighbouring motor 2 of base bearing 3 (for example, upper surface in Fig. 1 and Fig. 3), example Such as, as shown in figure 3, connectivity slot 321 can be downwardly concaved by a part for the upper surface of base bearing 3 is formed, and the edge of connectivity slot 321 The axial annular extension of bent axle 6, now connectivity slot 321 is the annular groove around bent axle 6, thus, by setting company in a ring Groove 321, after inwall of the lubricating oil isolated through motor 2 along housing 1 flow to the upper surface of base bearing 3, no matter lubricating oil Any position in the circumference of housing 1, can flow into connectivity slot 321, and finally flow into oil sump, accumulate without lubricating oil Situation in first pressure chamber 11.

As shown in Figure 3-Figure 5, the first end (for example, upper end in Fig. 1 and Fig. 3) and connectivity slot 321 of subchannel 322 are connected Connection, and the second end (for example, lower end in Fig. 1 and Fig. 3) for connecting subchannel 322 connects with piston cavity 71.Thus, separate Endoporus along piston cavity 71, supplementary bearing 5 is backed downward into oil sump by the part in the lubricating oil gone out, in the process, lubrication The other sliding bearing formed to eccentric part 61 and piston 7 and bent axle 6 and supplementary bearing 5 of oil is lubricated；And another part is then Flow up along the helical oil groove of base bearing 3, and discharged from the top of base bearing 3, in the process, oil lubrication base bearing 3 and bent axle 6 form sliding bearing.Wherein, bottom wall phase of the above-mentioned first end of subchannel 322 preferably with connectivity slot 321 is connected Even, connection subchannel 322 can be smoothly through with the lubricating oil ensured in connectivity slot 321 and enters piston cavity 71.

Further, as shown in Fig. 1, Fig. 3, Fig. 5-Fig. 6, such as vertical compressor of compressor 100 further comprises：Oil return Shell 9 is collected, the top that shell 9 is collected in oil return is opened wide, and oil return is collected on a side surface of the neighbouring motor 2 that shell 9 is located at base bearing 3, Oil return is collected and oil return collecting tank 91 is limited between shell 9 and base bearing 3, and oil return collecting tank 91 is used to store the lubricating oil isolated Such as refrigeration oil simultaneously gives the lubrication oil supply of base bearing 3.Specifically, base bearing 3 includes hub portion 31 and the flange being sequentially connected vertically Portion 32, oil return are collected shell 9 through hub portion 31 and fixed with flange portion 32, can be fastened for example, shell 9 is collected in oil return by screw On base bearing 3, oil return is collected and limits oil return collecting tank 91 between shell 9 and the periphery wall of hub portion 31, wherein on base bearing 3 Formed with the conductive channel communicated with oil return collecting tank 91, the lubricating oil in oil return collecting tank 91 is suitable to enter by conductive channel Between base bearing 3 and bent axle 6, it is lubricated with the sliding bearing formed to base bearing 3 and bent axle 6, while play the work of sealing With.Wherein, one end being connected with oil return collecting tank 91 of conductive channel is preferably placed at the bottom of oil return collecting tank 91.It is logical through turning on The lubricating oil that road enters between base bearing 3 and bent axle 6 from the lubricating oil that communicating passage enters from the top of base bearing 3 with discharging Afterwards, can flow back in oil return collecting tank 91, i.e., the lubricating oil such as refrigeration oil in oil return collecting tank 91 flows back to master by conductive channel Continue lubricating spindle in the helical oil groove of bearing 3 and hold 3 and the sliding bearing that is formed of bent axle 6, realize circulation.

According to some embodiments of the present invention, reference picture 1 simultaneously combines Fig. 4, close between base bearing 3 and the internal perisporium of housing 1 Envelope connection, fastening and sealing are realized for example, can be enclosed between the internal perisporium of base bearing 3 and housing 1 by boxing one, but be not limited to This.Certainly, sealed frame is also provided with a side surface of the neighbouring motor 2 of base bearing 3, base bearing 3 passes through sealed frame It is tightly connected with housing 1.Alternatively, boxing connects between the internal perisporium of sealed frame and housing 1.

Further, sealing gasket is provided between sealed frame and base bearing 3, to be further ensured that the He of first pressure chamber 11 Sealing between second pressure chamber 12.Wherein, fastened between base bearing 3, sealed frame and sealing gasket using screw And sealing.

Suction hole is opened in the side of second pressure chamber 12, and cylinder 4 is entered after reservoir 14 realizes Oil-gas Separation.Low pressure The lubricating oil of oil sump such as refrigeration oil enters cylinder 4 by air intake passage 41 and lubricates and seal associated gap.After being compressed in cylinder 4 Refrigerant by the steam vent discharge on base bearing 3 and supplementary bearing 5, motor 2 is flowed through in first pressure chamber 11 and realizes oil gas Separation, the freezing oil-lubricated bearing and piston cavity 71 isolated in first pressure chamber 11, by supplementary bearing 5 and bent axle 6 it Between gap return to low pressure oil sump, realize whole circulation.

Such as vertical compressor of compressor 100 according to embodiments of the present invention, solves traditional low back pressure compressor Leakage problem caused by the low pressure of piston cavity 71 and discharge chamber it is too small can not oil the problem of, and high-tension lubrication after Oil-gas Separation Oily the problem of such as refrigeration oil can not return to low pressure oil sump.In addition, the structure of the compressor 100 of the present invention is simple, performance is high, reliably Property it is good, suitable for few oil sealing, refrigerant be inflammable and explosive refrigerant occasion use.

Other of such as vertical compressor of compressor 100 according to embodiments of the present invention are formed and operated for this area All it is known for those of ordinary skill, is not detailed herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe Structure, material or feature are contained at least one embodiment or example of the present invention.In this manual, to above-mentioned term Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description Point can combine in an appropriate manner in any one or more embodiments or example.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this The scope of invention is limited by claim and its equivalent.

Claims

A kind of 1. compressor, it is characterised in that including：

Housing, the bottom of the housing have oil sump；

Motor, the motor are located in the housing；

Compression mechanism, the compression mechanism are located at the side of the neighbouring oil sump of the motor, and the compression mechanism includes master Bearing, cylinder assembly, supplementary bearing, crankshaft and piston, the base bearing and the supplementary bearing are located at the axial direction of the cylinder assembly Both ends, and the base bearing is located at the side of the neighbouring motor of the cylinder assembly, the cylinder assembly includes cylinder, institute The first end for stating bent axle is connected with the motor, and the second end of the bent axle passes through the base bearing, the cylinder assembly and institute Supplementary bearing is stated, the piston is set on the bent axle and in the cylinder, the piston has piston cavity, the pressure It is tightly connected between the internal perisporium of contracting mechanism and the housing so that the enclosure interior is separated into first pressure chamber and pressure Less than the second pressure chamber of the first pressure chamber pressure, the motor is located in the First pressure chamber room, the oil Pond is located in the second pressure chamber, and the piston cavity communicates with the first pressure chamber, the first pressure chamber Pressure be the compressor pressure at expulsion, the second pressure chamber pressure be the compressor pressure of inspiration(Pi), the gas Cylinder has suction muffler, wherein formed with the suction passage communicated with the suction muffler in the compression mechanism, in the oil sump Lubricating oil is suitable to enter the suction muffler by the suction passage.
2. compressor according to claim 1, it is characterised in that the discharge chamber of the cylinder is located at the First pressure chamber It is indoor.
3. compressor according to claim 2, it is characterised in that clearance seal between the supplementary bearing and the bent axle.
4. compressor according to claim 2, it is characterised in that on the housing formed with the first pressure chamber The exhaust outlet communicated, the exhaust outlet are located at the side of the remote compression mechanism of the motor,

Oil-gas Separation is realized after flowing through the motor from the gas mixture of discharge chamber discharge.
5. according to the compressor any one of claim 1-4, it is characterised in that the bent axle has eccentric part, wherein The piston is set on the eccentric part, pushing surface untill a side surface of the neighbouring supplementary bearing of the eccentric part,

It is provided between the thrust surface and the supplementary bearing and rolls thrust structure so that between the thrust surface and the supplementary bearing Friction be rolling friction.
6. compressor according to claim 5, it is characterised in that the side table of the neighbouring eccentric part of the supplementary bearing Formed with the holding tank for accommodating the rolling thrust structure on face.
7. compressor according to claim 5, it is characterised in that the rolling thrust structure is ball thrust bearing.
8. compressor according to claim 1, it is characterised in that formed with for described first to be pressed on the base bearing The communicating passage that power chamber connects with the piston cavity,

The communicating passage includes：

Connectivity slot, the connectivity slot form on a side surface of the neighbouring motor of the base bearing and along the bent axles Axial annular extends；With

Subchannel is connected, the first end of the connection subchannel connects with the connectivity slot, and the second of the connection subchannel End connects with the piston cavity.
9. compressor according to claim 8, it is characterised in that further comprise：

Shell is collected in oil return, and the oil return is collected shell and is located on a side surface of the neighbouring motor for the base bearing, described time Oil is collected and limits oil return collecting tank between shell and the base bearing,

Formed with the conductive channel communicated with the oil return collecting tank on wherein described base bearing, the profit in the oil return collecting tank Lubricating oil is suitable to enter between the base bearing and the bent axle by the conductive channel.
10. compressor according to claim 1, it is characterised in that between the internal perisporium of the base bearing and the housing It is tightly connected.
11. compressor according to claim 10, it is characterised in that the side table of the neighbouring motor of the base bearing Face is provided with sealed frame, and the base bearing is connected by the sealed frame with the housing seal.
12. compressor according to claim 11, it is characterised in that the internal perisporium of the sealed frame and the housing it Between boxing connect.
13. compressor according to claim 11, it is characterised in that be provided between the sealed frame and the base bearing Sealing gasket.