CN206281245U - Oil return device and air conditioning unit - Google Patents
Oil return device and air conditioning unit Download PDFInfo
- Publication number
- CN206281245U CN206281245U CN201621196147.3U CN201621196147U CN206281245U CN 206281245 U CN206281245 U CN 206281245U CN 201621196147 U CN201621196147 U CN 201621196147U CN 206281245 U CN206281245 U CN 206281245U
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- China
- Prior art keywords
- oil return
- oil
- weight
- float
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000004378 air conditioning Methods 0.000 title abstract description 6
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 32
- 239000003921 oil Substances 0.000 description 171
- 235000003642 hunger Nutrition 0.000 description 5
- 230000037351 starvation Effects 0.000 description 5
- 239000010725 compressor oil Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model discloses an oil return device and air conditioning unit belongs to air conditioner technical field, for solving the problem design that current device oil return is inefficiency. The utility model discloses an oil return device, including oil return subassembly, float, weight and the time oil pipe that is provided with the oil return mouth, the oil return subassembly is connected with the float, and the weight upper end is connected with float or oil return subassembly, lower extreme and time oil pipe upper end are connected, oil return mouth and time oil pipe intercommunication, time oil pipe can adjust its length in the vertical direction according to its atress at the vertical direction at least. The utility model discloses oil returning device and air conditioning unit utilize buoyancy and gravity balance principle, make the oil return opening can accurately be located highly minimum rich oil layer liquid level at the vertical direction, ensure that the oil return is reliable, improve oil return efficiency, have prevented that the compressor from lacking oil and having moved.
Description
Technical field
The utility model is related to air-conditioning technical field, more particularly to a kind of oil return apparatus and is provided with the oil return apparatus
Air-conditioner set.
Background technology
Oil return apparatus are widely used in the industries such as air-conditioning, freezing and refrigeration.But, the oil return opening of existing some oil return apparatus
Position is fixed, it is impossible to follow the change of liquid level, and oil return is unable to caused by dislocation, and compressor has oil starvation operation hidden danger.
Although, in some technical schemes by be arranged on vertical direction can follow the movable oil return opening of level change come gram
Take and have the following disadvantages in drawbacks described above, but these technical schemes：1st, buoyancy size can not be adjusted, movable oil return opening is difficult hanging down
Nogata is to being positioned exactly at highly minimum oil-enriched layer liquid level；2nd, movable oil return opening vertically limited can only follow liquid level
Change, when air motion causes liquid fluctuating or inclines, oil return opening can not in the horizontal direction follow liquid level movement, it is difficult to accurate
Positioned at highly minimum oil-enriched layer liquid level, cause oil return not smooth or even be unable to oil return；3rd, float is slided along guide rod, be there is clamping stagnation and is showed
As；4th, oil return is inefficient.
Utility model content
In view of above mentioned problem, a purpose of the present utility model is to propose that a kind of buoyancy size can be adjusted, oil return
Mouth can be positioned exactly at the oil return apparatus of highly minimum oil-enriched layer liquid level in vertical direction；
Another purpose of the present utility model is to propose that a kind of oil return opening can follow liquid in vertical and horizontal direction
Face movement is being positioned exactly at the oil return apparatus of highly minimum oil-enriched layer liquid level；
Further object of the present utility model is to propose a kind of oil return reliability, the compressor of oil return efficiency high.
It is up to this purpose, on the one hand, the utility model uses following technical scheme：
A kind of oil return apparatus, including oil return component, float, weight and the oil return pipe of oil return opening are provided with, the oil return group
Part is connected with the float, and the weight upper end is connected with the float or the oil return component, on lower end and the oil return pipe
End connection, the oil return opening is connected with the oil return pipe, and the oil return pipe can at least be adjusted according to its stress in vertical direction
Save its length in vertical direction.
Further, the oil return pipe is flexible pipe.
Further, the flexible pipe is helical coil, bellows or telescopic tube.
Further, the oil return apparatus also include being sheathed on the ring-shaped weight block on the outside of the weight.
Further, the weight outside screw is connected with slim nut to lock the balancing weight.
Further, the center of gravity of the oil return component, the float and the weight is located along the same line, and described straight
Line and horizontal plane.
Further, the float includes hollow circular cylinder portion and hollow cone portion setting up and down, the cylinder
Portion is connected with the oil return component, and the cone portion is connected with the weight upper end, the internal face of the weight upper end and institute
The outside wall surface for stating cone portion matches.
Further, the upper end of the weight is connected with the lower end of the float, and the weight is in ladder shaft-like, round table-like
Or it is cylindric.
Further, the hollow back oil ring and multiple that the oil return component includes being sheathed on the outside of the float are circumferentially equal
The connecting tube of cloth, is evenly equipped with multiple oil return openings on the side wall of the back oil ring, be provided with the weight and the oil return
The drainback passage of pipe connection, the drainback passage of the two ends of the connecting tube respectively with the back oil ring and the weight is connected.
Further, connected by multiple disc being evenly distributed between the back oil ring and the cylinder portion of the float
Connect.
Further, the connecting tube includes U-tube section.
Further, the proximal end outside at the two ends of the connecting tube is arranged finite place piece respectively, and the locating part is used for
Limit the connecting tube and insert the back oil ring, the depth of the weight.
On the other hand, the utility model uses following technical scheme：
A kind of air-conditioner set, the air-conditioner set is provided with any of the above-described described oil return apparatus.
The beneficial effects of the utility model are as follows：
Oil return apparatus of the present utility model, include for producing the float of buoyancy, the weight for producing gravity, utilize
Gravity and buoyant equilibrium principle, allow oil return opening to be positioned exactly at highly minimum oil-enriched layer liquid level in vertical direction, it is ensured that return
It is oily reliable, improve oil return efficiency, it is therefore prevented that compressor oil starvation runs, and is easy to low manufacture cost.
Oil return apparatus of the present utility model, oil return pipe is flexible pipe so that oil return component, float and weight can be simultaneously with liquid
Face is moved in vertical and horizontal direction, to adapt to the liquid fluctuating under airflow influence, incline, and during cooling load change
Liquid surface lifting influences, and oil return opening is positioned exactly at highly minimum oil-enriched layer liquid level at any time, it is ensured that oil return reliability, oil return efficiency is carried
About 10%-15% high.
Air-conditioner set of the present utility model, as a result of above-mentioned oil return apparatus, its oil return reliability, oil return efficiency high is kept away
The operation of compressor oil starvation, working stability are exempted from.
Brief description of the drawings
Fig. 1 is the structural representation of the oil return apparatus that the utility model preferred embodiment one is provided；
Fig. 2 is the partial cutaway view of the oil return pipe that the utility model preferred embodiment one is provided；
Fig. 3 is the partial cutaway view of the weight that the utility model preferred embodiment one is provided；
Fig. 4 is the sectional view of the float that the utility model preferred embodiment one is provided；
Fig. 5 is the structural representation of the balancing weight that the utility model preferred embodiment one is provided；
Fig. 6 is the structural representation of the slim nut that the utility model preferred embodiment one is provided；
Fig. 7 is the structural representation of the back oil ring that the utility model preferred embodiment one is provided；
Fig. 8 is the structural representation of the connecting tube that the utility model preferred embodiment one is provided；
Fig. 9 is the structural representation of the disc that the utility model preferred embodiment one is provided；
Figure 10 is the partial enlarged drawing at A in Fig. 2；
Figure 11 is the partial cutaway view of the union nut that the utility model preferred embodiment one is provided；
Figure 12 is the partial cutaway view of the joint that the utility model preferred embodiment one is provided；
Figure 13 is the sectional view of the compressor that the utility model preferred embodiment two is provided；
Figure 14 is the partial enlarged drawing at B in Figure 13.
In figure：1st, float；2nd, weight；3rd, oil return pipe；4th, back oil ring；5th, connecting tube；6th, disc；7th, balancing weight；8th, it is slim
Nut；9th, union nut；10th, joint；11st, low pressure recycle liquid storing barrel；12nd, blind flange；13rd, twin adapter；14th, union nut；15、
Joint；01st, cylinder portion, 02, cone portion；21st, internal face；22nd, drainback passage；23rd, interface；24th, internal thread；41st, oil return
Mouthful；42nd, interface；51st, locating part；91st, hex nut body；92nd, round platform portion；101st, external screw thread；102nd, external screw thread；103rd, lower end
Face.
Specific embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by specific embodiment.
Preferred embodiment one：
This preferred embodiment provides a kind of oil return apparatus, and it is main but does not limit to and is applied in the refrigeration plants such as air-conditioning.
Refer to Fig. 1, the oil return apparatus that the present embodiment is provided, including be provided with the oil return component of oil return opening 41, float 1, weight 2 and return
Oil pipe 3, oil return component is connected with float 1, and the upper end of weight 2 is connected with float 1 or oil return component, lower end and the upper end of oil return pipe 3 connect
Connect, oil return opening 41 is connected with oil return pipe 3, the lower end of oil return pipe 3 is used to directly be connected with the oil-out on low pressure recycle liquid storing barrel
Or by miscellaneous part indirect communication, oil return pipe 3 at least can adjust it in vertical direction according to it in the stress of vertical direction
Length.
The oil return apparatus of the present embodiment, include the float 1 mainly for generation of buoyancy, the weight mainly for generation of gravity
Hammer 2, using gravity and buoyant equilibrium principle, allows oil return opening 41 to be positioned exactly at highly minimum oil-enriched layer liquid in vertical direction
Face, it is ensured that oil return reliability, improves oil return efficiency, it is therefore prevented that compressor oil starvation runs, and is easy to low manufacture cost.
In order to adapt to the liquid fluctuating under airflow influence, incline, and liquid surface lifting influence during cooling load change, return
Oil pipe 3 is flexible pipe so that oil return component, float 1 can be moved with liquid level in vertical and horizontal direction simultaneously with weight 2, be made
Oil return opening 41 is positioned exactly at highly minimum oil-enriched layer liquid level at any time, it is ensured that oil return reliability, and oil return efficiency improves about 10%-
15%.
Fig. 2 is please referred to, in the present embodiment, oil return pipe 3 is preferred but is not limited to helical coil, in order to limited
Altitude range receives longer pipeline, is drifted about over long distances in oil-enriched layer liquid level self adaptation beneficial to oil return apparatus, while preventing oil return
The long liquid outlet for blocking low pressure recycle liquid storing barrel of pipe 3.Oil return pipe 3 in the present embodiment can also be bellows or telescopic tube
Deng.
In order to avoid the relative liquid surface of oil return opening 41 is inclined, the center of gravity of oil return component, float 1 and weight 2 is located at same straight line
On, and straight line and horizontal plane.
The structure of weight 2 is not specifically limited, and can serve as producing gravity, and oil return opening is adjusted with the collective effect of float 1
It is higher or lower than oil-enriched layer liquid level that 41 position avoids oil return opening 41.But preferably, please refer to Fig. 3, weight 2 it is upper
End is connected with the lower end of float 1, and weight 2 is in ladder shaft-like or round table-like, and the diameter of weight 2 is in reduce along direction from top to bottom
Trend, to strengthen oil return apparatus vertical stability, it is to avoid oil return opening 41 is inclined relative to liquid level.The structure of the present embodiment weight 2
Be not limited to above-mentioned situation, for example can with cylindrical, diameter not along direction from top to bottom always be in reduction trend
Ladder shaft-like, round table-like or other any shapes rotation body structures, oil return apparatus vertical stability can be strengthened.
Mainly for generation of buoyancy, while being the support frame of whole oil return apparatus, its structure is not limited specifically float 1
System.But Fig. 4 preferably, is please referred to, float 1 includes hollow circular cylinder portion 01 and hollow cone portion 02 setting up and down,
Cylinder portion 01 is connected with oil return component, and cone portion 02 is connected with the upper end of weight 2, the internal face 21 and circular cone of the upper end of weight 2
The outside wall surface in body portion 02 matches.It is preferably between float 1 and weight 2 and is welded to connect.The float 1 of this structure in the present embodiment
Be conducive to strengthening the vertical stability of oil return apparatus, reduce float 1 and expose liquid level, reduce influence of the air-flow to float 1.
Fig. 5 and Fig. 6 is please referred to, on the basis of said structure, the oil return apparatus in the present embodiment also include being arranged
In the ring-shaped weight block 7 in the outside of weight 2, the quantity of balancing weight 7 can be configured according to specific needs, can be with weight 2, floating
Sub 1 collective effect, it is ensured that oil return opening 41 is positioned exactly at oil-enriched layer liquid level.Preferably, the outside screw of weight 2 is connected with slim
Nut 8 to lock balancing weight 7, in order to the dismounting of balancing weight 7.
The structure of oil return component is not specifically limited, and the oil that can absorb its inlet port is flowed in oil return pipe 3.
Preferably, Fig. 7 and Fig. 8 is please referred to, oil return component includes being sheathed on the hollow back oil ring 4 and multiple in the outside of float 1 along week
To uniform connecting tube 5, multiple oil return openings 41 are evenly equipped with the side wall of back oil ring 4, interior being provided with of weight 2 connects with oil return pipe 3
Drainback passage 22, the bottom wall of back oil ring 4 is provided with the interface 42 for the insertion of connecting tube 5, set on the side wall of weight 2
The interface 23 for the insertion of connecting tube 5 is equipped with, the two ends of connecting tube 5 connect with the drainback passage 22 of back oil ring 4 and weight 2 respectively
It is logical.It is both preferably between connecting tube 5 and back oil ring 4 and connecting tube 5 and weight 2 and is welded to connect.In the present embodiment, oil return opening 41
The oil of absorption is flowed in the drainback passage 22 of weight 2 and then entered in oil return pipe 3, oil return dress through the internal cavities of back oil ring 4
Put it is simple and compact for structure, be easy to processing and fabricating.
Oil return opening 41 can be respectively provided with the present embodiment on the inner and outer wall of back oil ring 4, to increase back oil ring 4 with richness
The contact area of oil reservoir, using oil film tension force effect, enhancing is reduced back to oily absorption affinity, and inner and outer ring radially oil return simultaneously
Oily dead angle, improves oil return efficiency；Oil return opening only can certainly be set in the outer wall of back oil ring 4 in the inwall of back oil ring 4 or only
41.The quantity of oil return opening 41 is not specifically limited, and can be configured according to specific needs, and the diameter of oil return opening 41 is preferably greatly
In equal to 2mm.
Please refer to Fig. 8, connecting tube 5 includes U-tube section, U-tube section prevent gas under fluid-tight, stopped status beneficial to being formed
Phase refrigerant is mixed into refrigeration oil.The proximal end outside at the two ends of connecting tube 5 is arranged finite place piece 51 respectively, and locating part 51 is used to limit
The insertion of connecting tube 5 back oil ring 4, the depth of weight 2.Locating part 51 is preferably spacing ring.The quantity of connecting tube 5 is not limited specifically
System, can be configured according to conditions such as specific recirculating oil quantities, be preferably in the present embodiment and be circumferentially uniformly arranged three connections
Pipe 5.
On the basis of said structure, Fig. 9 is please referred to, by many between back oil ring 4 and the cylinder portion 01 of float 1
The individual disc 6 being evenly distributed is connected.It is both preferably between disc 6 and back oil ring 4 and disc 6 and float 1 and is welded to connect.Spoke
Plate 6 is preferably arc surface, the wall towards the cylinder portion 01 of float 1 and is preferably and faces directly towards the wall of back oil ring 4.Multiple is along week
To uniform disc 6 in addition to connection function, the turning effort that the enhancing anti-air-flow of float 1 causes is also acted as, prevent oil return pipe 3 from being formed
Fast knot.
Connected mode between weight 2 and oil return pipe 3 is not specifically limited, and can be configured according to specific needs.But
Preferably, Figure 10 to Figure 12 is please referred to, is connected by hollow joint 10 and union nut 9 between weight 2 and oil return pipe 3,
Union nut 9 includes the hex nut body 91 and the round platform portion 92 that are connected, and the truncated cone-shaped upper port of oil return pipe 3 is sheathed on round platform
In portion 92, the outside wall surface of the upper end of joint 10 is provided with the external screw thread 101 being engaged with the internal thread 24 of the lower end of weight 2, lower end
Outside wall surface be provided with the external screw thread 102 being engaged with the internal thread of hex nut body 91, the lower surface 103 of joint 10 is preferred
It is to match with the internal face of the upper port of oil return pipe 3.Attachment structure between the present embodiment weight 2 and oil return pipe 3 is simple, be easy to
Operation.
In addition, it is necessary to be explanatorily, the utility model is not limited to above-mentioned situation, for example, floating in the utility model
Son 1 can also be spherical in shape or annular etc., and the quantity of float 1 can also be multiple.The back oil ring 4 of oil return component can for it is spherical,
Radial, zigzag shape etc., such as oil return component include oil return ball, and float 1 is to be sheathed on the spheroid inside oil return ball, and float 1
It is connected by spoke etc. between oil return ball, oil return opening 41, the weldering of the bottom of oil return opening 41 is provided with oil return ball maximum horizontal cutting plane
Weight 2 is connect, oil return ball bottom directly connects with the drainback passage 22 in weight 2, or oil return ball is by being placed in oil return ball and weight 2
Between connecting tube 5 connect.
Preferred embodiment two：
This preferred embodiment provides a kind of air-conditioner set, and the air-conditioner set is set just like described in preferred embodiment one
Oil return apparatus.The lower end of the oil return pipe 3 of oil return apparatus directly connects or by it with the oil-out on low pressure recycle liquid storing barrel 11
His part indirect communication.
The mounting means of oil return apparatus is not limited, and refers to Figure 13 and Figure 14, it is preferable that the low pressure recycle liquid storage of air-conditioner set
Blind flange 12 is provided with the flange of bucket 11, twin adapter 13 is fixedly connected with the oil-out of blind flange 12, oil return apparatus are returned
The lower end of oil pipe 3 is tightened on twin adapter 13 by union nut 14, joint 15.
The air-conditioner set that the present embodiment is provided as a result of above-mentioned oil return apparatus, keep away by its oil return reliability, oil return efficiency high
The operation of compressor oil starvation, working stability are exempted from.
Know-why of the present utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality
With new principle, and can not by any way be construed to the limitation to the utility model protection domain.Based on explanation herein,
Those skilled in the art associates other specific embodiments of the present utility model by would not require any inventive effort,
These modes are fallen within protection domain of the present utility model.
Claims (13)
1. a kind of oil return apparatus, it is characterised in that oil return component, float (1), weight (2) including being provided with oil return opening (41)
With oil return pipe (3), the oil return component is connected with the float (1), weight (2) upper end and the float (1) or described
The connection of oil return component, lower end are connected with the oil return pipe (3) upper end, and the oil return opening (41) connects with the oil return pipe (3), institute
State oil return pipe (3) at least can adjust its length in vertical direction according to it in the stress of vertical direction.
2. oil return apparatus according to claim 1, it is characterised in that the oil return pipe (3) is flexible pipe.
3. oil return apparatus according to claim 2, it is characterised in that the flexible pipe is helical coil, bellows or stretches
Heat-Shrinkable Tubings.
4. oil return apparatus according to claim 1, it is characterised in that the oil return apparatus also include being sheathed on the weight
(2) the ring-shaped weight block (7) on the outside of.
5. oil return apparatus according to claim 4, it is characterised in that weight (2) outside screw is connected with slim spiral shell
Female (8) are locking the balancing weight (7).
6. according to any described oil return apparatus of claim 1 to 5, it is characterised in that the oil return component, the float (1)
Center of gravity with the weight (2) is located along the same line, and the straight line and horizontal plane.
7. oil return apparatus according to claim 6, it is characterised in that the float (1) includes hollow circle setting up and down
Trunk portion (01) and hollow cone portion (02), the cylinder portion (01) are connected with the oil return component, the cone portion
(02) it is connected with the weight (2) upper end, the internal face (21) of weight (2) upper end and the outer wall of the cone portion (02)
Face matches.
8. oil return apparatus according to claim 6, it is characterised in that the upper end of the weight (2) and the float (1)
Lower end connects, and the weight (2) is in ladder shaft-like, round table-like or cylindric.
9. according to any described oil return apparatus of claim 1 to 5, it is characterised in that the oil return component includes being sheathed on institute
The hollow back oil ring (4) on the outside of float (1) and multiple connecting tubes (5) being evenly distributed are stated, on the side wall of the back oil ring (4)
It is evenly equipped with multiple oil return openings, the weight (2) and is provided with the drainback passage (22) connected with the oil return pipe (3), institute
Drainback passage of the two ends of connecting tube (5) respectively with the back oil ring (4) and the weight (2) is stated to connect (22).
10. oil return apparatus according to claim 9, it is characterised in that the circle of the back oil ring (4) and the float (1)
Connected by multiple disc (6) being evenly distributed between trunk portion (01).
11. oil return apparatus according to claim 9, it is characterised in that the connecting tube (5) includes U-tube section.
12. oil return apparatus according to claim 9, it is characterised in that the proximal end outside at the two ends of the connecting tube (5)
Finite place piece (51) is arranged respectively, and the locating part (51) inserts the back oil ring (4), institute for limiting the connecting tube (5)
State the depth of weight (2).
13. a kind of air-conditioner sets, it is characterised in that the air-conditioner set sets any just like claim 1 to 12 described returning
Oily device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621196147.3U CN206281245U (en) | 2016-10-28 | 2016-10-28 | Oil return device and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621196147.3U CN206281245U (en) | 2016-10-28 | 2016-10-28 | Oil return device and air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281245U true CN206281245U (en) | 2017-06-27 |
Family
ID=59083036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621196147.3U Withdrawn - After Issue CN206281245U (en) | 2016-10-28 | 2016-10-28 | Oil return device and air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206281245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338161A (en) * | 2016-10-28 | 2017-01-18 | 珠海格力电器股份有限公司 | Oil return device and air conditioning unit |
| CN111219911A (en) * | 2020-01-09 | 2020-06-02 | 珠海格力电器股份有限公司 | Injection oil return device and refrigeration equipment |
-
2016
- 2016-10-28 CN CN201621196147.3U patent/CN206281245U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338161A (en) * | 2016-10-28 | 2017-01-18 | 珠海格力电器股份有限公司 | Oil return device and air conditioning unit |
| CN111219911A (en) * | 2020-01-09 | 2020-06-02 | 珠海格力电器股份有限公司 | Injection oil return device and refrigeration equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170627 Effective date of abandoning: 20180123 |
|
| AV01 | Patent right actively abandoned |