CN206280259U - A kind of oil supply structure of horizontal type scroll compressor - Google Patents
A kind of oil supply structure of horizontal type scroll compressor Download PDFInfo
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- CN206280259U CN206280259U CN201720188104.9U CN201720188104U CN206280259U CN 206280259 U CN206280259 U CN 206280259U CN 201720188104 U CN201720188104 U CN 201720188104U CN 206280259 U CN206280259 U CN 206280259U
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- oil
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- bent axle
- orbiter
- fuel feeding
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Abstract
The utility model discloses a kind of oil supply structure of horizontal type scroll compressor, including casing, frame, orbiter, fixed scroll, bent axle, rear bearing sheet, bearing block, fuel sucking pipe and blast pipe, the rear of rear bearing sheet includes oil sump, and bearing block is arranged on rear bearing sheet；Bent axle includes axial oil duct, and bearing block includes shoe cream room, and the upper end of fuel sucking pipe connects shoe cream room, and lower end is inserted into oil sump；Crankshaft front bearing, rear bearing and crank throw bearing are all sliding bearings, the inner chamber of frame is pressure oil cavity, orbiter includes damping fuel feeding road, and the oil inlet in damping fuel feeding road leads to described pressure oil cavity, the teeth groove of the scroll wrap of the logical orbiter of oil-out in damping fuel feeding road.The rotational resistance of the utility model not only bent axle is small, and is easy to crankshaft bearing and scroll plate while providing lubrication.
Description
[technical field]
The utility model is related to screw compressor, more particularly to a kind of oil supply structure of horizontal type scroll compressor.
[background technology]
According to the mode that main shaft is arranged, screw compressor is divided into vertical vortex and horizontal type scroll compressor, horizontal
Screw compressor is mainly used in the field of the height limited space such as bus, subway and train.
The patent application of Application No. CN201110173522.8 discloses a kind of horizontal type scroll compressor, is included in closed
Compression mechanism, motor drive mechanism, transmission mechanism, supporting mechanism and the baffle plate contained in container, closed container be provided with air intake duct and
Blast pipe, oil supply system is made up of baffle plate, oil pumping device and oil supply gallery.The external diameter of baffle plate is less than closed container internal diameter, in gear
Annulus is formed between plate external diameter and sealing container internal diameter, baffle plate bottom is provided with oily passage, and baffle plate is fixedly mounted on closed appearance
In device on the lower surface of lower support, closed container is divided into motor cavity and shoe cream room by baffle plate.Blast pipe is arranged on closed container
By barrier partitions into shoe cream room side middle part, blast pipe is connected with shoe cream room.Before and after the shortcoming of the invention is bent axle
Bearing and main shaft crank throw bearing use sliding bearing, and sliding bearing contact surface is big, and rotational resistance is big, and transmission efficiency is low, uses
Life-span is low, and fault rate is high, is not suitable for the compressor for running at high speed；And the inconvenience when crankshaft front bearing uses rolling bearing
In with scroll plate simultaneously lubrication is provided.
[content of the invention]
The technical problems to be solved in the utility model is to provide that a kind of bent axle rotational resistance is small, be easy to crankshaft front bearing and
Scroll plate provides the oil supply structure of the horizontal type scroll compressor of lubrication simultaneously.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is, a kind of horizontal type scroll compressor
Oil supply structure, including casing, frame, orbiter, fixed scroll, bent axle, rear bearing sheet, bearing block, fuel sucking pipe and blast pipe,
Rear bearing sheet is arranged in the rear portion of casing, and the rear of rear bearing sheet includes oil sump, and bearing block is arranged on rear bearing sheet；Bent axle
Including axial oil duct, axial oil duct includes central oil passage and eccentric oil duct；The anterior fore bearing by frame of bent axle is supported, after
Portion is supported by the rear bearing in bearing block, and orbiter is driven by the crank throw of crankshaft front end by crank throw bearing；Blast pipe is installed
It is L-shaped or U-shaped on the side wall of rear bearing sheet rear casing；The entrance of blast pipe upward, near the top of casing；Bearing block
Including shoe cream room, the upper end connection shoe cream room of fuel sucking pipe, lower end is inserted into oil sump；Fore bearing, rear bearing and crank throw bearing are all
It is sliding bearing, the inner chamber of frame is pressure oil cavity, and orbiter includes damping fuel feeding road, the logical institute of oil inlet in damping fuel feeding road
The pressure oil cavity stated, the teeth groove of the scroll wrap of the logical orbiter of oil-out in damping fuel feeding road.
The oil supply structure of above-described horizontal type scroll compressor, including oil sealing, described bearing block include oil sealing bearing bore,
The outer ring of oil sealing is arranged in the oil sealing bearing bore of bearing block, and described shoe cream room is located at behind oil seal lip；The rear end of bent axle
Including oil sealing axle journal, oil sealing axle journal inserts described shoe cream room through the lip of oil sealing.
The oil supply structure of above-described horizontal type scroll compressor, bearing block includes body, bearing cap and bonnet, body bag
Bearing bearing bore is included, the outer ring of rear bearing is fixed in bearing bearing bore, the inner ring of rear bearing is fixed on the installation axle journal at bent axle rear portion
On；Bearing cap is fixed on the rear end of body, and the endoporus of bearing cap is through hole, and through hole includes described oil sealing bearing bore；Bonnet is fixed
In the rear end of bearing cap, after cover the mounting hole including fuel sucking pipe, the logical oil sealing bearing bore of mounting hole.
The oil supply structure of above-described horizontal type scroll compressor, fills between the endoporus and bent axle at frame rear portion including oil resistance
Put, the eccentric oil duct of bent axle is communicated with the end of crankshaft crank, is matched somebody with somebody by needle bearing between crank throw and orbiter drive hole
Close.
The oil supply structure of above-described horizontal type scroll compressor, described oil resistance device is sliding bearing；Bent axle front axle
Hold in frame inner chamber.
The oil supply structure of above-described horizontal type scroll compressor, central oil passage is coaxial with the main shaft of bent axle, eccentric oil
The axis coaxle in road and crank throw；Central oil passage is oil-feed oil duct, and eccentric oil duct is fuel-displaced oil duct.
The oil supply structure of above-described horizontal type scroll compressor, the oil inlet in damping fuel feeding road is close to positioned at orbiter
On the sealing surface at edge；Fixed scroll includes the oil groove connected with the pressure oil cavity on the sealing surface at edge, works as bent axle
When the direction of crank throw is towards the oil inlet for damping fuel feeding road, described oil inlet is connected with described oil groove；When crankshaft crank
When the oil inlet in damping fuel feeding road is deviateed in direction, described oil inlet disconnects with described oil groove.
The oil supply structure of above-described horizontal type scroll compressor, described oil groove includes the groove of annular and recessed with described
The oilhole of groove connection, when the direction of crankshaft crank is towards the oil inlet for damping fuel feeding road, described oil inlet and described oil
Hole connects；When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil inlet disconnects with described oilhole,
Described groove is connected with described pressure oil cavity.
The rotational resistance of the oil supply structure of the utility model horizontal type scroll compressor not only bent axle is small, and transmission efficiency makes
With long lifespan, fault rate is low, is suitable for the compressor for running at high speed；And be easy to be provided simultaneously to crankshaft bearing and scroll plate
Lubrication.
[brief description of the drawings]
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the sectional view of the utility model embodiment horizontal type scroll compressor.
Fig. 2 is the partial enlarged drawing at I positions in Fig. 1.
When Fig. 3 is that the direction of the utility model embodiment crankshaft crank dorsad damps the oil inlet in fuel feeding road, fuel feeding is damped
The structural representation at road position.
When Fig. 4 is the oil inlet in direction direction damping fuel feeding road of the utility model embodiment crankshaft crank, fuel feeding is damped
The structural representation at road position.
Fig. 5 is the structure chart of the utility model embodiment fixed scroll.
Fig. 6 is the structure chart of the utility model embodiment orbiter.
[specific embodiment]
The oil supply structure of the utility model embodiment horizontal type scroll compressor as shown in Figures 1 to 6, including casing 1, frame
11st, orbiter 3, fixed scroll 4, bent axle 2, crankshaft front bearing 20, crankshaft rear bearing 13, bearing block, oil sealing 12, rear bearing sheet
10th, blast pipe 15, suction line 16 and fuel sucking pipe 5.
Fixed scroll 4 is screwed in the front end of frame 11, and the exhaust outlet 401 in the center of fixed scroll 4 is interior with casing 1
Chamber communicates, and this screw compressor is high pressure cavity compressor.Scroll wrap on orbiter 3 and fixed scroll 4 forms scroll compression
The working chamber of machine.The inner chamber of frame 11, the cavity between orbiter 3, fixed scroll 4 and bent axle 2 press shoe cream room D in constituting.
Bearing block includes body 6, bearing cap 7 and bonnet 8.
There is axial oil duct inside bent axle 2, axial oil duct includes interconnected central oil passage 205 and eccentric oil duct 206, in
Heart oil duct 205 is coaxial with the main shaft of bent axle 2, the axis coaxle of eccentric oil duct 206 and crank throw 201；Central oil passage 205 is oil-feed
Oil duct, eccentric oil duct 206 is fuel-displaced oil duct.
The cavity E at the middle part of casing 1 is connected by the high pressure chest C anterior with casing of exhaust passage 21.Rear bearing sheet 10 is arranged
At the rear portion of casing, blast pipe 15 is arranged on the rear of rear bearing sheet 10, is L-shaped or U-shaped on the side wall of casing 1；Blast pipe 15
Entrance upward, is close to the top of casing 1.
The pressure of the inner chamber A in the rear casing of rear bearing sheet 10 is pressure at expulsion, and the bottom of inner chamber A is oil sump.
The periphery of rear bearing sheet (baffle plate) 10 is weldingly fixed on casing 1, there is oil duct and air flue on rear bearing sheet 10, connection
The cavity E at the middle part of the casing 1 and inner chamber A at the rear of rear bearing sheet 10.The body 6 of bearing block is fixed by screws in rear bearing sheet 10
In the endoporus at middle part.
The front portion of bent axle 2 is supported by the crankshaft front bearing 20 in frame 11, and crankshaft front bearing 20 is roller bearing, after
Portion is supported by the crankshaft rear bearing 13 in bearing block.
The eccentric oil duct 206 of bent axle 2 is communicated with the end of the crank throw 201 of bent axle 2, the pressure oil that the conveying of eccentric oil duct 206 comes
Shoe cream room D is pressed in lubrication quill bearing 22 and then inflow first, crankshaft front bearing 20 is lubricated.Crank throw 201 passes through needle bearing 22
Drive hole with orbiter 13 coordinates.The sliding bearing 19 installed in the endoporus at the rear portion of frame 11 is used as frame 11 and bent axle 2
Between oil resistance device,
Because the inner chamber of frame 11 is closing, the pressure in middle pressure shoe cream room D is big to the axial force of orbiter 3
In compression chamber gas force to the axial force of orbiter 3, make the auto-approaching fixed scroll 4 of orbiter 3.
There is damping fuel feeding road 301 in orbiter 3, pressure shoe cream room D during the oil inlet 302 in damping fuel feeding road is logical, damping is supplied
The oil-out 303 of oil duct leads to the teeth groove of the scroll wrap of orbiter 3.By axial oil duct convey come pressure oil therefrom press oil storage
Chamber D abstemiously enters the teeth groove of the scroll wrap of orbiter 3, lubricates orbiter 3 and fixed scroll 4.
Orbiter and fixed scroll 4 are sealed in the part near edge by sealing surface, with the rotation of bent axle 2, are moved
The sealing surface of scroll plate makees revolution translation relative to the sealing surface of fixed scroll 4.
The oil inlet 302 in damping fuel feeding road 301 is located at orbiter 3 on the sealing surface at edge.Fixed scroll 4 is close to
There are the oil groove connected with middle pressure shoe cream room D, the oil that oil groove includes the groove 402 of annular and connected with groove on the sealing surface at edge
Hole 403.The sealing surface that fixed scroll 4 exposes is the part of middle pressure shoe cream room D, during annular groove 402 is partly exposed to
In pressure shoe cream room D, as the oil inlet passage of oilhole 403.
As shown in figure 4, when the oil inlet 302 in the direction direction damping fuel feeding road 301 of the crank throw 201 of bent axle 2, oil inlet
302 are close to and are interconnected with oilhole 403.Now, the pressure lubrication oil in middle pressure shoe cream room D from annular groove 402 enter with
The oilhole 403 of groove connection, then damping fuel feeding road 301 is entered by oil inlet 302 from oilhole 403, into damping fuel feeding road 301
Enter the teeth groove of the scroll wrap of scroll plate 3 by oil-out 303, lubricate orbiter 3 and fixed scroll 4.
With the rotation of orbiter 3, when the oil inlet 302 in damping fuel feeding road 301 is left in the direction of the crank throw 201 of bent axle 2
Direction when, oil inlet 302 gradually staggers with oilhole 403, and hereafter oil inlet 302 is fully disconnected with oilhole 403.It is shown in Fig. 3
When the direction of the crank throw 201 of bent axle 2 dorsad damps the direction of oil inlet 302 in fuel feeding road 301, oil inlet 302 is complete with oilhole 403
Fully separating situation.
Orbiter 3 is often revolved round the sun 1 week, and oil inlet 302 is connected 1 time with oilhole 403, and damping fuel feeding road 301 is interval, of short duration
Ground can efficiently control the fuel delivery of the working chamber to screw compressor, dynamic and static whirlpool to the working chamber fuel feeding of screw compressor
Capstan both can effectively be lubricated, and will not enter excessive lubricating oil in the working chamber of screw compressor again, effectively be changed
The volumetric efficiency of screw compressor has been apt to it, the refrigerating capacity of screw compressor is improved.
The oil-out 303 in damping fuel feeding road 301 is close to the inner edge of the scroll wrap 304 of orbiter 3, as shown in figure 4, working as oil-feed
When mouth 302 is interconnected with oilhole 403, the outer rim of the scroll wrap 404 of fixed scroll 4 leaves the interior of the scroll wrap 304 of orbiter 3
Edge, the oil-out 303 to damping fuel feeding road 301 reserves fuel-displaced passage, make lubricating oil enter scroll wrap 404 and rotation tooth 304 it
Between, it is lubricated；When the outer rim of scroll wrap 404 is near the inner edge of the scroll wrap 304 of orbiter 3, scroll wrap 404 will be damped and supplied
The oil-out 303 of oil duct 301 is closed, and this structure can provide enough lubrications to being vortexed, while preventing excessive lubricating oil
Into vortex mechanism, the heat exchange to air-conditioning system brings negative impact.The oil-out 303 and dynamic vortex in damping fuel feeding road 301
The outer end head of 3 scroll wrap of disk 304 along scroll wrap 304 vortex lines corresponding to central angle be more than 270 °, less than 360 °.Such as Fig. 5
Shown, this angle is 360-25=335 ° in the present embodiment.So, oil-out 303 is located at the center section part of scroll wrap 304
The middle splenium position of position, the i.e. working chamber of screw compressor, the oil-out in damping fuel feeding road 301 in teeth groove during fuel feeding, suction muffler
It has been closed that, prevent the fuel-displaced of damping fuel feeding road 301 from flowing to suction muffler；Meanwhile, the oil-out in damping fuel feeding road 301 deviates compressor
The high pressure position of structure scroll wrap center portion, prevents the gases at high pressure in compression chamber from pressing shoe cream room D in flowing backwards entrance, makes vortex mechanism
Lubrication failure.
As depicted in figs. 1 and 2, crankshaft rear bearing 13 is ball bearing.The endoporus of body 6 is the axle of crankshaft rear bearing 13
Bearing bore, the outer ring of crankshaft rear bearing 13 is fixed in the bearing bearing bore of body 6, and the inner ring of crankshaft rear bearing 13 is fixed on bent axle
The bearing at 2 rear portions is installed on axle journal 202.
Bearing cap 7 is fixed by screws in the rear end of body 6, and the endoporus of bearing cap 7 is through hole, and the through hole holds for oil sealing
Hole, the outer ring of oil sealing 12 is arranged in the oil sealing bearing bore of bearing cap 7.
Bonnet 8 is fixed by screws in the rear end of bearing cap 7, has the mounting hole of fuel sucking pipe 5 on bonnet 8, before mounting hole
End communicates with oil sealing bearing bore.Mounting hole on the upper end connection bonnet 8 of fuel sucking pipe 5, in the oil sump of lower end insertion casing 1 bottom.
Oil sealing 12 is lip type outside framework oil seal, and shoe cream room B is located at the rear of oil seal lip.The material of the main part of oil sealing 12
It is composite high-molecular material, composite high-molecular material can be the composite high-molecular containing poly- four ethene, carbon fibre and graphite
Material, not only frictional resistance is small for the oil sealing that this composite high-molecular material containing poly- four ethene, carbon fibre and graphite is made,
And long service life.
The rearmost end of bent axle is the oil sealing axle journal 203 coordinated with oil sealing 12, and there is 1 big chamfering the rear end of oil sealing axle journal 203
204, it is easy to axle journal 204 to be inserted into oil sealing.
Shoe cream room B is pressed in constituting in space between oil sealing 12 and bonnet 8.The oil sealing axle journal 203 of the rear end of bent axle 2 passes through oil sealing
12 lip, presses shoe cream room B in insertion.
In order to further reduce the rotational resistance of bent axle, using as far as possible small oil sealing axle journal, the diameter of oil sealing axle journal 203 is small
In the installation axle journal 202 of 1/2nd bearings.
There is jump-ring slot in the endoporus of bearing cap 7, oil sealing jump ring 9 is arranged in jump-ring slot, and the front end of oil sealing 12 props up oil sealing
Jump ring 9, the rear end of oil sealing 12 has bonnet 8 to fix oil sealing 12.
This structure when mounted, first installs bent axle 2 and bearing 13, is then screwed the bearing with oil sealing jump ring 9
Lid 7.Ecto-entad is installed after bearing cap 7 again to installing oil sealing 12 in oil sealing bearing bore.Because oil sealing axle journal 203 has big chamfering
204 are oriented to, and can successfully install oil sealing, finally fix bonnet 8.
The utility model above example horizontal type scroll compressor frame is pressure oil cavity, and from bent axle axial direction, oil duct is defeated
The pressure oil sent also lubricates scroll plate in addition to the bearing of lubrication bent axle by damping fuel feeding road, and scroll plate can both be had
The lubrication of effect, will not enter excessive lubricating oil again in the working chamber of screw compressor, effectively improve screw compressor
Volumetric efficiency, the refrigerating capacity of screw compressor is improved.
The utility model above example horizontal type scroll compressor bearing related to bent axle all uses rolling bearing, bent axle
The rotational resistance of the shoe cream room oil sealing sealing at rear portion oil-feed position, rolling bearing and oil sealing is small, transmission efficiency, service life
Long, fault rate is low, and the utility model above example is suitable for the compressor for running at high speed.
Claims (8)
1. a kind of oil supply structure of horizontal type scroll compressor, including casing, frame, orbiter, fixed scroll, bent axle, rear branch
Fagging, bearing block, fuel sucking pipe and blast pipe, rear bearing sheet are arranged in the rear portion of casing, and the rear of rear bearing sheet includes oil sump, axle
Bearing is arranged on rear bearing sheet；Bent axle includes axial oil duct, and axial oil duct includes central oil passage and eccentric oil duct；Before bent axle
Portion is supported by the fore bearing in frame, and rear portion is supported by the rear bearing in bearing block, and orbiter is led to by the crank throw of crankshaft front end
Cross the driving of crank throw bearing；Blast pipe is arranged on the side wall of rear bearing sheet rear casing, is L-shaped or U-shaped；The entrance court of blast pipe
On, near the top of casing；Bearing block includes shoe cream room, and the upper end connection shoe cream room of fuel sucking pipe, lower end is inserted into oil sump, its
It is characterised by, fore bearing, rear bearing and crank throw bearing are all sliding bearings, and the inner chamber of frame is pressure oil cavity, orbiter bag
Damping fuel feeding road is included, the oil inlet in damping fuel feeding road leads to described pressure oil cavity, the logical orbiter of oil-out in damping fuel feeding road
Scroll wrap teeth groove.
2. the oil supply structure of horizontal type scroll compressor according to claim 1, including oil sealing, described bearing block includes oil
Envelope bearing bore, the outer ring of oil sealing is arranged in the oil sealing bearing bore of bearing block, and described shoe cream room is located at behind oil seal lip；Bent axle
Rear end include oil sealing axle journal, oil sealing axle journal through oil sealing lip, the described shoe cream room of insertion.
3. the oil supply structure of horizontal type scroll compressor according to claim 2, it is characterised in that bearing block include body,
Bearing cap and bonnet, body include bearing bearing bore, and the outer ring of rear bearing is fixed in bearing bearing bore, and the inner ring of rear bearing is fixed on
On the installation axle journal at bent axle rear portion；Bearing cap is fixed on the rear end of body, and the endoporus of bearing cap is through hole, and through hole includes described
Oil sealing bearing bore；Bonnet is fixed on the rear end of bearing cap, after cover the mounting hole including fuel sucking pipe, the logical oil sealing bearing bore of mounting hole.
4. the oil supply structure of horizontal type scroll compressor according to claim 1, it is characterised in that the endoporus at frame rear portion and
Include oil resistance device between bent axle, the eccentric oil duct of bent axle communicates with the end of crankshaft crank, crank throw and orbiter drive hole
Between by needle bearing coordinate.
5. the oil supply structure of horizontal type scroll compressor according to claim 4, it is characterised in that described oil resistance device is
Sliding bearing；Crankshaft front bearing is arranged in frame inner chamber.
6. the oil supply structure of horizontal type scroll compressor according to claim 1, it is characterised in that central oil passage and bent axle
Main shaft is coaxial, the axis coaxle of eccentric oil duct and crank throw；Central oil passage is oil-feed oil duct, and eccentric oil duct is fuel-displaced oil duct.
7. the oil supply structure of horizontal type scroll compressor according to claim 1, it is characterised in that the oil-feed in damping fuel feeding road
Mouth is located at orbiter on the sealing surface at edge；Fixed scroll includes and the pressure oil cavity on the sealing surface at edge
The oil groove of connection, when the direction of crankshaft crank is towards the oil inlet for damping fuel feeding road, described oil inlet and described oil groove
Connection；When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil inlet disconnects with described oil groove.
8. the oil supply structure of horizontal type scroll compressor according to claim 7, it is characterised in that described oil groove includes ring
The groove of shape and the oilhole connected with the groove, it is described when the direction of crankshaft crank is towards the oil inlet for damping fuel feeding road
Oil inlet connected with described oilhole；When the oil inlet in damping fuel feeding road is deviateed in the direction of crankshaft crank, described oil-feed
Mouth is disconnected with described oilhole, and described groove is connected with described pressure oil cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720188104.9U CN206280259U (en) | 2017-02-28 | 2017-02-28 | A kind of oil supply structure of horizontal type scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720188104.9U CN206280259U (en) | 2017-02-28 | 2017-02-28 | A kind of oil supply structure of horizontal type scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206280259U true CN206280259U (en) | 2017-06-27 |
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ID=59072122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720188104.9U Active CN206280259U (en) | 2017-02-28 | 2017-02-28 | A kind of oil supply structure of horizontal type scroll compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266374A (en) * | 2017-12-26 | 2018-07-10 | 广州万宝集团压缩机有限公司 | A kind of horizontal type scroll compressor |
| US11002278B2 (en) * | 2016-05-03 | 2021-05-11 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Pump mechanism and horizontal compressor having same |
-
2017
- 2017-02-28 CN CN201720188104.9U patent/CN206280259U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11002278B2 (en) * | 2016-05-03 | 2021-05-11 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Pump mechanism and horizontal compressor having same |
| CN108266374A (en) * | 2017-12-26 | 2018-07-10 | 广州万宝集团压缩机有限公司 | A kind of horizontal type scroll compressor |
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