CN105972716A - Sheet metal part connecting structure and air conditioner outdoor unit - Google Patents
Sheet metal part connecting structure and air conditioner outdoor unit Download PDFInfo
- Publication number
- CN105972716A CN105972716A CN201610478681.1A CN201610478681A CN105972716A CN 105972716 A CN105972716 A CN 105972716A CN 201610478681 A CN201610478681 A CN 201610478681A CN 105972716 A CN105972716 A CN 105972716A
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- China
- Prior art keywords
- sheet metal
- hole
- metal component
- location
- shaped rib
- Prior art date
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- 239000002184 metal Substances 0.000 title claims abstract description 85
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 85
- 230000002787 reinforcement Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract 10
- 238000004378 air conditioning Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides a sheet metal part connecting structure and an air conditioner outdoor unit. This sheet metal component connection structure is used for connecting first sheet metal component and second sheet metal component, includes: the first U-shaped reinforcing part is arranged on the first sheet metal part; the second U-shaped reinforcing part is arranged on the second sheet metal part; the first U-shaped reinforcing part and the second U-shaped reinforcing part are nested and fixedly connected. The first sheet metal part and the second sheet metal part are connected through a first U-shaped reinforcing part and a second U-shaped reinforcing part which are respectively arranged on the first sheet metal part and the second sheet metal part, and the first U-shaped reinforcing part and the second U-shaped reinforcing part are mutually nested and fixedly connected; in addition, the first U-shaped reinforcing part and the second U-shaped reinforcing part which are nested with each other have the advantages that due to the design of the U-shaped structures, the strength of the connecting parts is increased, and the first sheet metal part and the second sheet metal part are not easy to deform in the transportation and use processes; and the first sheet metal part and the second sheet metal part can be fully contacted, and a gap is not easy to generate.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of sheet metal component attachment structure and air conditioning chamber
Outer machine.
Background technology
As it is shown in figure 1, existing air-conditioner outdoor unit includes back side panel 1 and heat exchanger fixed plate 2, after
Side plate 1 and heat exchanger fixed plate 2 are all the sheet metal components for slab construction, the most corresponding on two pieces of sheet metal components
It is provided with hole, two location.As in figure 2 it is shown, during assembling, by back side panel 1 and heat exchanger fixed plate 2
Two slab construction overlaps, then by two screws or be bolted to two location hole in will after
Side plate 1 and heat exchanger fixed plate 2 are fixed.
Owing to sheet metal component area is big, thickness is little, particularly marginal portion, is easy in handling process
Cause deformation；Further, since there is foozle between hole, location, if there being a location during assembling
Hole correspondence does not goes up, and when playing screw by force, easily sheet metal component crimp；Also have in transport
During the situations such as collision of jolting, these all can cause the deformation out-of-flatnesses of two sheet metal component contact surfaces,
Thus causing connecting between sheet metal component have gap, the sound that the compressor of air-conditioner outdoor unit produces is the biggest
A part will pass from this gap, thus increases whole and air conditioning unit noise.
Summary of the invention
It is desirable to provide a kind of sheet metal component attachment structure and air-conditioner outdoor unit, to solve prior art
In two pieces of sheet metal components fixing when connecting, the yielding technical problem of sheet metal component.
The invention provides a kind of sheet metal component attachment structure, for connecting the first sheet metal component and the second panel beating
Part, including: the first U-shaped rib, it is arranged on the first sheet metal component；Second U-shaped rib,
It is arranged on the second sheet metal component；First U-shaped rib and the second U-shaped rib nesting arrange and consolidate
Fixed connection.
Further, the first U-shaped rib includes that first fixes bottom surface, the second U-shaped rib bag
Include second and fix bottom surface；First fixes bottom surface and second fixes the fixing connection in bottom surface.
Further, the first U-shaped rib also includes being arranged at first and fixes the first of both sides, bottom surface and add
Face is strengthened in strong face and second；Second U-shaped rib also includes that being arranged at second fixes the of both sides, bottom surface
Three strengthen face and the 4th strengthens face；First reinforcement face and the 3rd reinforcement face abut, second strengthens face
Abut with the 4th reinforcement face.
Further, first fix bottom surface and second and fix and be correspondingly arranged respectively on the length direction of bottom surface
At least two is had to position hole.
Further, first fix arrange on bottom surface the first hole, location and at least one second location hole,
First hole, location is circular, the second location Kong Weichang waist type；Second fixes that to be provided with the 3rd on bottom surface fixed
Hole, position and at least one the 4th hole, location, the 3rd hole, location and the 4th hole, location are circle；First is fixed
Position Kong Yu tri-positions hole and is correspondingly arranged, and the second location Kong Yu tetra-positions hole and is correspondingly arranged.
Further, first fix bottom surface and second and fix bottom surface and be plane.
Further, first fix bottom surface and second and fix bottom surface and be cambered surface.
Present invention also offers a kind of air-conditioner outdoor unit, including above-mentioned sheet metal component attachment structure.
Further, air-conditioner outdoor unit includes back side panel and heat exchanger fixed plate, and back side panel is provided with
First U-shaped rib, heat exchanger fixed plate is provided with the second U-shaped rib, back side panel and changing
Hot device fixed plate is connected by sheet metal component attachment structure.
Sheet metal component attachment structure according to the present invention and air-conditioner outdoor unit, by being respectively arranged at the first metal plate
The first U-shaped rib on gold part and the second sheet metal component and the second U-shaped rib, and the first U-shaped
Rib and the second U-shaped are strengthened mutually nested and are fixedly connected with, thus by the first sheet metal component and the
Two sheet metal components connect；Additionally, the first mutually nested U-shaped rib and the second U-shaped rib,
Design due to its U-shaped structure so that the intensity of coupling part increases, in transport and the process of use
In, the first sheet metal component and the second sheet metal component are unlikely to deform；And first between sheet metal component and the second sheet metal component
Can be fully contacted, it is not easy to produce gap.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, the present invention
Schematic description and description be used for explaining the present invention, be not intended that the improper limit to the present invention
Fixed.In the accompanying drawings:
Fig. 1 is the structural representation of the air-conditioner outdoor unit of prior art；
Fig. 2 is the structural representation that the back side panel of Fig. 1 is connected with heat exchanger fixed plate；
Fig. 3 is the cross-sectional schematic of the sheet metal component attachment structure of the present invention；
Fig. 4 is the structural representation of the sheet metal component attachment structure of the present invention；
Fig. 5 a is the enlarged diagram at the A of Fig. 4；
Fig. 5 b is the enlarged diagram at the B of Fig. 4；
Fig. 6 a is the first U-shaped rib or the first embodiment of the second U-shaped rib of the present invention
Structural representation；
Fig. 6 b is the first U-shaped rib or second embodiment of the second U-shaped rib of the present invention
Structural representation；
Fig. 6 c is the first U-shaped rib or the 3rd embodiment of the second U-shaped rib of the present invention
Structural representation.
Description of reference numerals:
1, back side panel；2, heat exchanger fixed plate；10, the first U-shaped rib；11, first fix
Bottom surface；12, first strengthens face；13, second strengthens face；14, the first hole, location；15, second is fixed
Hole, position；20, the second U-shaped rib；21, second bottom surface is fixed；22, the 3rd strengthens face；23、
4th strengthens face；24, the 3rd hole, location；25, the 4th hole, location；30, bolt.
Detailed description of the invention
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown on figure 3, according to the sheet metal component attachment structure of the present invention, for connect the first sheet metal component and
Second sheet metal component.Sheet metal component attachment structure includes the first U-shaped rib 10 and the second U-shaped rib
20, the first U-shaped rib 10 is arranged on the first sheet metal component, and the second U-shaped rib 20 is arranged
On the second sheet metal component；First U-shaped rib 10 is nested with the second U-shaped rib 20 to be arranged also
Fixing connection.Sheet metal component attachment structure according to the present invention, by be respectively arranged at the first sheet metal component and
The first U-shaped rib 10 and the second U-shaped rib 20 on second sheet metal component, and the first U-shaped
Rib 10 is mutually nested with the second U-shaped rib 20 and is fixedly connected with, thus by the first metal plate
Gold part and the second sheet metal component connect；Additionally, the first mutually nested U-shaped rib 10 and the 2nd U
Shape rib 20, due to the design of its U-shaped structure so that the intensity of coupling part increases, in fortune
Defeated and use during, the first sheet metal component and the second sheet metal component are unlikely to deform；And first sheet metal component and
Can be fully contacted between second sheet metal component, it is not easy to produce gap.
Specifically, as it is shown on figure 3, the first U-shaped rib 10 and the second U-shaped rib 20 are
Identical U-shaped structure, can be that the first U-shaped rib 10 nesting is arranged on the second U-shaped rib
In 20, it is also possible to be that the second U-shaped rib 20 nesting is arranged in the first U-shaped rib 10.
It should be noted that when the first U-shaped rib 10 nesting is arranged in the second U-shaped rib 20
Time, the first U-shaped rib 10 is sized slightly larger than the size of the second U-shaped rib 20；When
When two U-shaped rib 20 nestings are arranged in the first U-shaped rib 10, the second U-shaped rib
20 sizes being sized slightly larger than the first U-shaped rib 10, also are able to make while facilitating nesting
First U-shaped rib 10 and the second U-shaped rib 20 abut.First U-shaped rib 10
With the second fixing connection of U-shaped rib 20, can be the first U-shaped rib 10 and the second U-shaped
Being connected with each other between certain face of rib 20, it is also possible to be the first U-shaped rib 10 and second
Being connected with each other between two or three faces of U-shaped rib 20.
First U-shaped rib 10 includes that first fixes bottom surface 11, and the second U-shaped rib 20 includes
Second fixes bottom surface 21；Preferably, first fix bottom surface 11 and second and fix between bottom surface 21 fixing
Connect, fix bottom surface 21 be fixedly connected with by fixing bottom surface 11 and second by first, facilitate and fill
Join.
As shown in Fig. 4, Fig. 5 a and Fig. 5 b, in the present embodiment, first bottom surface 11 and is fixed
Two fix bottom surface 21 is connected by bolt 30 or screw, to facilitate dismounting.First fixes bottom surface 11
Fix with described second and on the length direction of bottom surface 21, be correspondingly arranged on hole, at least two location respectively.
In order to prevent owing to manufacturing error causes the first hole, location and second fixing bottom surface 11 to fix the end
Hole, the location correspondence in face 21 does not goes up, and first fixes and arrange the first hole, location 14 and at least on bottom surface 11
Hole 15, one second location, the first hole 14, location is circular, and the second hole 15, location is long waist type；The
Two fix and are provided with the 3rd hole 24, location and at least one the 4th hole 25, location on bottom surface 21, and the 3rd is fixed
Hole, position 24 and the 4th hole 25, location are circle；First hole 14, location is corresponding with the 3rd hole 24, location
Arranging, the second hole 15, location is correspondingly arranged with the 4th hole 25, location.The diameter of the first hole 14, location
Can be identical with the diameter in the 3rd hole 24, location, it is also possible to be that the diameter in the first hole, location 14 is slightly larger than
Or the slightly smaller than the 3rd location hole 24 diameter.The width of the second hole 15, location and the 4th hole 25, location
Diameter identical, it is also possible to be the second hole, location 15 width slightly larger than the 4th location hole 25 diameter.
Usually, first by solid by bolt 30 or screw to the first hole, location 14 and the 3rd hole, location 24
Fixed；Again the second hole 15, location is fixed with the 4th hole 25, location.Due to foozle, may lead
Cause the 4th hole 25, location and position hole 15 relative to second on the first length direction fixing bottom surface 11
Deviation, and the second hole 15, location is set to long waist type, the 4th location being correspondingly arranged therewith
Hole 25 is provided in round, and can regulate position on the second hole 15, location, the 4th hole 25, location,
Without causing the first sheet metal component and the deformation of the second sheet metal component.Usually, the length direction of long waist type
The length direction fixing bottom surface 11 with first is consistent.
In the present embodiment, the second hole, location 15 and the 4th hole 25, location can be arranged in correspondence with one
Or it is multiple.In other implementations, it is also possible to by second location hole 15 be provided in round, and
4th hole 25, location is set to long waist type.
As it is shown on figure 3, the first U-shaped rib 10 also includes that being arranged at first fixes both sides, bottom surface 11
The first reinforcement face 12 and second strengthen face 13；Second U-shaped rib 20 also includes being arranged at
Two the 3rd reinforcement face 22 and the 4th reinforcement faces 23 fixing both sides, bottom surface 21；First strengthens face 12 He
3rd reinforcement face 22 abuts, the second reinforcement face 13 and the 4th reinforcement face 23 abut.Phase
Mutually against the first reinforcement face 12 and the 3rd strengthen face 22, second and strengthen face 13 and the 4th and strengthen face
23 bonding strengths that can strengthen sheet metal component.
As shown in Figure 6 a, in the first embodiment, first fix bottom surface 11 and second and fix bottom surface 21
It is plane, to facilitate processing and manufacturing.First fixes bottom surface 11 or the second fixes the width of bottom surface 21
L is 10mm-20mm, and preferably first fixes bottom surface 11 or the second fixes the width L of bottom surface 21 and be
15mm.First strengthens face 12 or second strengthens face 13 or the 3rd reinforcement face 22 or the 4th reinforcement face
The width H of 23 (strengthening face for four) is 10mm-20mm, preferably four the width H strengthening face
For 15mm.
As shown in Figure 6 b, in a second embodiment, unlike first embodiment, in order to reduce
First fixes between bottom surface 11 and the first reinforcement face 12 or the second reinforcement face 13 or second fixes the end
Face 22 or the 4th stress strengthening between face 23 are strengthened in face 21 and the 3rd, can fix the end by first
Between face 11 and the first reinforcement face 12 or the second reinforcement face 13 or second fix bottom surface 21 and the 3rd
It is arranged to arc transition between reinforcement face 22 or the 4th reinforcement face 23.
As fig. 6 c, in the third embodiment, unlike above-mentioned two embodiment, can be by
First fixes bottom surface 11 and second fixes bottom surface 21 and is set to cambered surface；Preferably, the cross section of cambered surface is
Semicircle, the radius R of semicircle is 5mm-10mm, and preferably radius R is 7.5mm.
Present invention also offers a kind of air-conditioner outdoor unit, this off-premises station includes that above-mentioned sheet metal component connects knot
Structure.Air-conditioner outdoor unit includes back side panel 1 and heat exchanger fixed plate 2, and back side panel 1 is provided with first
U-shaped rib 10, heat exchanger fixed plate 2 is provided with the second U-shaped rib 20, back side panel 1
Connected by sheet metal component attachment structure with heat exchanger fixed plate 2.
The back side panel 1 of air-conditioner outdoor unit and heat exchanger fixed plate 2 are by above-mentioned sheet metal component attachment structure
Connect, it is possible to prevent back side panel 1 and the deformation of heat exchanger fixed plate 2, be also avoided that back side panel simultaneously
Gap is produced between 1 and heat exchanger fixed plate 2, thus the compressor in reaching to prevent air-conditioner outdoor unit
The phenomenon that the sound produced passes from gap, reduces whole air conditioning unit noise.
As can be seen from the above description, the above embodiments of the present invention achieve following technology effect
Really:
Sheet metal component attachment structure according to the present invention and air-conditioner outdoor unit, by being respectively arranged at the first metal plate
The first U-shaped rib 10 and the second U-shaped rib 20 on gold part and the second sheet metal component, and first
U-shaped rib 10 is mutually nested with the second U-shaped rib 20 and is fixedly connected with, thus by
One sheet metal component and the second sheet metal component connect；Additionally, the first mutually nested U-shaped rib 10 and
Two U-shaped ribs 20, due to the design of its U-shaped structure so that the intensity of coupling part increases,
During transport and using, the first sheet metal component and the second sheet metal component are unlikely to deform；And first panel beating
Can be fully contacted between part and the second sheet metal component, it is not easy to produce gap.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for ability
For the technical staff in territory, the present invention can have various modifications and variations.All spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (9)
1. a sheet metal component attachment structure, for connecting the first sheet metal component and the second sheet metal component, its feature
It is, including:
First U-shaped rib (10), is arranged on described first sheet metal component；
Second U-shaped rib (20), is arranged on described second sheet metal component；
Described first U-shaped rib (10) is nested with described second U-shaped rib (20) to be arranged
And fix connection.
Sheet metal component attachment structure the most according to claim 1, it is characterised in that
Described first U-shaped rib (10) includes that first fixes bottom surface (11), described second U-shaped
Rib (20) includes that second fixes bottom surface (21)；Described first fixes bottom surface (11) and described
Second fixes the fixing connection in bottom surface (21).
Sheet metal component attachment structure the most according to claim 2, it is characterised in that
Described first U-shaped rib (10) also includes that being arranged at described first fixes bottom surface (11) two
Face (13) is strengthened in first reinforcement face (12) of side and second；
Described second U-shaped rib (20) also includes that being arranged at described second fixes bottom surface (21) two
Face (23) is strengthened in 3rd reinforcement face (22) of side and the 4th；
Described first reinforcement face (12) and the described 3rd is strengthened face (22) and is abutted, and described second
Reinforcement face (13) and the described 4th is strengthened face (23) and is abutted.
Sheet metal component attachment structure the most according to claim 2, it is characterised in that
Described first fixes bottom surface (11) and described second fixes on the length direction of bottom surface (21) point
It is not correspondingly arranged on hole, at least two location.
Sheet metal component attachment structure the most according to claim 4, it is characterised in that
Described first fixes and arranges the first hole, location (14) on bottom surface (11) and at least one is second fixed
Hole, position (15), described first hole, location (14) is circular, and described second hole, location (15) is for long
Waist type；
Described second fix be provided with on bottom surface (21) the 3rd location hole (24) and at least one the 4th
Hole, location (25), described 3rd hole, location (24) and the 4th hole, location (25) are circle；
Described first hole, location (14) is correspondingly arranged with described 3rd hole, location (24), and described second
Hole, location (15) is correspondingly arranged with described 4th hole, location (25).
6. according to the sheet metal component attachment structure described in any one of claim 1 to 5, it is characterised in that
Described first fixes bottom surface (11) and described second fixes bottom surface (21) and is plane.
7. according to the sheet metal component attachment structure described in any one of claim 1 to 5, it is characterised in that
Described first fixes bottom surface (11) and described second fixes bottom surface (21) and is cambered surface.
8. an air-conditioner outdoor unit, it is characterised in that include as described in any one of claim 1 to 7
Sheet metal component attachment structure.
Air-conditioner outdoor unit the most according to claim 8, it is characterised in that
Described air-conditioner outdoor unit includes back side panel (1) and heat exchanger fixed plate (2), described back side panel
(1) it is provided with the first U-shaped rib (10) on, described heat exchanger fixed plate (2) is provided with
Second U-shaped rib (20), described back side panel (1) and described heat exchanger fixed plate (2) are passed through
Described sheet metal component attachment structure connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478681.1A CN105972716B (en) | 2016-06-23 | 2016-06-23 | Sheet metal part connecting structure and air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478681.1A CN105972716B (en) | 2016-06-23 | 2016-06-23 | Sheet metal part connecting structure and air conditioner outdoor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105972716A true CN105972716A (en) | 2016-09-28 |
| CN105972716B CN105972716B (en) | 2020-09-04 |
Family
ID=57019629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610478681.1A Active CN105972716B (en) | 2016-06-23 | 2016-06-23 | Sheet metal part connecting structure and air conditioner outdoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105972716B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375462A (en) * | 2012-04-11 | 2013-10-30 | 珠海格力电器股份有限公司 | Screw hole reinforcing plate and sheet metal part connecting structure comprising same |
| CN203463432U (en) * | 2013-09-13 | 2014-03-05 | 广东欧科空调制冷有限公司 | Connecting structure of sheet metal parts |
| CN203605369U (en) * | 2012-11-29 | 2014-05-21 | 三菱电机株式会社 | Outdoor unit of air conditioner |
| CN103925654A (en) * | 2013-01-15 | 2014-07-16 | 三菱电机株式会社 | Outdoor unit of air-conditioning apparatus |
| JP2015017740A (en) * | 2013-07-10 | 2015-01-29 | 三菱重工業株式会社 | Outdoor unit for air conditioner |
| CN206001626U (en) * | 2016-06-23 | 2017-03-08 | 珠海格力电器股份有限公司 | Sheet metal part connecting structure and air conditioner outdoor unit |
-
2016
- 2016-06-23 CN CN201610478681.1A patent/CN105972716B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375462A (en) * | 2012-04-11 | 2013-10-30 | 珠海格力电器股份有限公司 | Screw hole reinforcing plate and sheet metal part connecting structure comprising same |
| CN203605369U (en) * | 2012-11-29 | 2014-05-21 | 三菱电机株式会社 | Outdoor unit of air conditioner |
| CN103925654A (en) * | 2013-01-15 | 2014-07-16 | 三菱电机株式会社 | Outdoor unit of air-conditioning apparatus |
| JP2015017740A (en) * | 2013-07-10 | 2015-01-29 | 三菱重工業株式会社 | Outdoor unit for air conditioner |
| CN203463432U (en) * | 2013-09-13 | 2014-03-05 | 广东欧科空调制冷有限公司 | Connecting structure of sheet metal parts |
| CN206001626U (en) * | 2016-06-23 | 2017-03-08 | 珠海格力电器股份有限公司 | Sheet metal part connecting structure and air conditioner outdoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105972716B (en) | 2020-09-04 |
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