CN206847142U - A kind of knockout filter screen bracket and knockout - Google Patents
A kind of knockout filter screen bracket and knockout Download PDFInfo
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- CN206847142U CN206847142U CN201720501482.8U CN201720501482U CN206847142U CN 206847142 U CN206847142 U CN 206847142U CN 201720501482 U CN201720501482 U CN 201720501482U CN 206847142 U CN206847142 U CN 206847142U
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- knockout
- rack body
- hole
- filter screen
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Abstract
The utility model is on a kind of knockout filter screen bracket and knockout, is related to Compressor Technology field.The technical scheme mainly used for：A kind of knockout filter screen bracket includes rack body；Wherein, first through hole is opened on rack body；Also, flow-guiding structure is provided with first through hole, for carrying out water conservancy diversion to liquid refrigerants.Wherein, first through hole datum plane projection along rack body circumferential direction extension；Also, first through hole is more than along the circumferential length of rack body the length along rack body radial direction in the projection of datum plane.Datum plane is the plane where the planar section of rack body upper surface.A kind of knockout includes above-mentioned knockout filter screen bracket.A kind of compressor includes above-mentioned knockout.The utility model is mainly used in improving the liquid separation ability of knockout, extenuates pressure of inspiration(Pi) fluctuation, reduces the noise of knockout and compressor, lifts the performance of compressor.
Description
Technical field
A kind of Compressor Technology field is the utility model is related to, more particularly to a kind of knockout filter screen bracket and liquid separation
Device.
Background technology
One knockout (also known as gas-liquid separator) is generally set on compressor, used in evaporator and compressor pump it
Between, separated with the gas-liquid mixed refrigerant of flash-pot in future, the gaseous coolant isolated, which enters in compresser cylinder, is pressed
Contracting, the liquid refrigerants isolated are stored in the bottom of knockout.Therefore, the main function of knockout is to prevent that liquid refrigerants is direct
Into in compressor pump body, so as to prevent the phenomenon of a large amount of liquid hammers of compressor.
Liquid separation ability of the filter screen bracket to knockout in knockout plays vital effect.Existing related liquid separation
Device technology mainly has the filter screen bracket of following two types.A kind of filter screen bracket for being provided with multiple manholes.Another kind is
Filter screen bracket provided with multiple spherical punchings with guide functions.
Under some specific operating modes, as heated after low frequency refrigeration or defrost, vaporizer side often accumulates more liquid
State refrigerant.Therefore, using above-mentioned filter screen bracket knockout at least there is a problem in that：
(1) filter screen stand with manhole is difficult to the refrigerant for efficiently separating gas-liquid two-phase so that point of knockout
Liquid energy power is low.Especially when compressor air suction mass dryness fraction is smaller, knockout is difficult to efficiently separate gas-liquid two-phase refrigerant.
(2) there is the spherical punching filter screen stand with guide functions, although the liquid separation ability of knockout can be improved, warp
The gas-liquid two-phase refrigerant for crossing water conservancy diversion impacts to the wall of knockout, hybrid perturbation, easily produces noise and pressure of inspiration(Pi) arteries and veins
It is dynamic.
Utility model content
In view of this, the utility model provides a kind of knockout filter screen bracket and knockout, main purpose are improving
While knockout liquid separation ability, avoid refrigerant from rushing at knockout side wall, so as to reduce noise, extenuate pressure of inspiration(Pi) pulsation.
To reach above-mentioned purpose, the utility model mainly provides following technical scheme：
On the one hand, embodiment of the present utility model provides a kind of knockout filter screen bracket, wherein, knockout filter screen bracket bag
Include：
Rack body；
First through hole, the first through hole are opened on the rack body；Also, it is provided with water conservancy diversion in the first through hole
Structure, for carrying out water conservancy diversion to liquid refrigerants；
Wherein, the first through hole datum plane projection along the rack body circumferential direction extension；Also,
The first through hole is more than along the rack body radial direction in the projection of datum plane along the circumferential length of rack body
Length.
Wherein, the datum plane is plane where the planar section of rack body upper surface.
The purpose of this utility model and solve its technical problem and can also be applied to the following technical measures to achieve further.
Preferably, the first through hole includes the first hole wall；Wherein,
First hole wall is arranged to the flow-guiding structure；Also, the upper end of first hole wall extends to the support
The upper surface of main body, the lower end of first hole wall is free end.
Preferably, the flow-guiding structure forms concave cambered surface；And/or
The upper end of first hole wall form that unclosed formula is circular, unclosed formula is oval or unclosed formula polygon in
It is any.
Preferably, when first hole wall forms concave cambered surface, the first hole wall lower end is in the datum plane
Straight line where the both ends of projection is first straight line；
The rack body is at the center that the datum plane projects and the first hole wall lower end in the datum plane
The line at the midpoint at the both ends of projection is second straight line；
Wherein, the angle of the first straight line and second straight line is β；Wherein, -30 °≤β≤30 °.
Preferably, the angle β of the first straight line and second straight line is 0 °.
Preferably, wherein, the minimum point is projected as at first point the datum plane；The first hole wall upper end
With with described first point distance most long second point；
Wherein, the angle of the second point and the line of minimum point and the datum plane is α；Wherein, 10 °≤α≤
60°。
Preferably, the angle α of the second point and the line of minimum point and the datum plane is 30 °.
Preferably, at least one second through hole is additionally provided with the rack body, for making refrigerant pass through the support
Main body.
Preferably, the first through hole and the second through hole are along the rack body in the projection of the datum plane
Circumferentially-spaced setting.
Preferably, the center position of the rack body forms convex closure.
On the other hand, the utility model embodiment also provides a kind of knockout, wherein, the knockout includes any of the above-described
Knockout filter screen bracket described in.
Preferably, the housing of the knockout is provided with exhaust outlet, and is connected with gas exhaust piping on the exhaust outlet；Its
In,
When the rack body of the knockout filter screen bracket is provided with convex closure, the circular arc chord length of the convex closure is more than described
The diameter of gas exhaust piping inlet end.
Preferably, the distance of the end face of the inlet end of the gas exhaust piping and datum plane is H；
A diameter of D of the rack body in the projection of the datum plane；
Wherein, 0.04≤H/D≤0.17.
Preferably, air entry is offered on the housing of the knockout, and suction line is connected with the air entry；Its
In,
The end face of the outlet side of the suction line and the distance of datum plane are S；
A diameter of D of the rack body in the projection of the datum plane；
Wherein, 0.3≤S/D≤0.6.
Compared with prior art, knockout filter screen bracket and knockout of the present utility model at least have following beneficial to effect
Fruit：
The present embodiment provide knockout filter screen bracket by by the first through hole provided with flow-guiding structure in datum plane
Circumferential direction of the projection along rack body extends, when the liquid refrigerants is passed through first through hole, substantially along support
What main body circumferentially flowed downward, so as to avoid refrigerant from rushing at knockout side wall.Therefore, the knockout filter screen branch that the present embodiment provides
Frame improves the liquid separation ability of knockout, reduces noise, extenuates pressure of inspiration(Pi) pulsation.
Further, the utility model is implemented the part hole wall of first through hole being arranged to flow-guiding structure, without in addition
Conducting element is installed, so not only reduces cost, and be easy to process.
Further, the utility model embodiment by flow-guiding structure by being arranged to concave cambered surface, to liquid refrigerants
Water conservancy diversion effect is good, and can prevent liquid refrigerants from impacting knockout wall well.
Further, the knockout filter screen bracket that the utility model embodiment provides is setting first with flow-guiding structure
On the basis of through hole, then a through hole without flow-guiding structure is set, it is cold in the gaseous coolant of knockout upper cavity and the liquid of convergence
When matchmaker is by the second through hole and first through hole, the second through hole can effectively reduce inspiratory resistance, and first through hole can be to refrigerant liquid
It is subject to water conservancy diversion, improves the gas-liquid separation effect of knockout.Therefore, the knockout filter screen bracket that the present embodiment provides can improve point
The gas-liquid separation ability of liquid device, and knockout inspiratory resistance is effectively reduced, extenuate pressure of inspiration(Pi) fluctuation.
Further, the knockout filter screen bracket that the utility model embodiment provides is by the second through hole and first through hole in base
Directrix plane projection is provided at circumferentially spaced along rack body.By in this way, per share oblique by first through hole water conservancy diversion
Under refrigerant can import it is adjacent flowed to vertically by the second through hole water conservancy diversion under refrigerant in, mitigate the refrigerant swash of wave to knockout cylinder
The harm of wall.
On the other hand, the utility model embodiment also provides a kind of knockout, wherein, the knockout includes above-mentioned liquid separation
Device filter screen bracket.Therefore, the knockout of the utility model embodiment has any of the above-described beneficial effect, does not repeat one by one herein.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, with preferred embodiment of the present utility model and coordinate accompanying drawing detailed below
Describe in detail bright as after.
Brief description of the drawings
Fig. 1 is a kind of structural representation for knockout that embodiment of the present utility model provides；
Fig. 2 is a kind of sectional view for knockout filter screen bracket that embodiment of the present utility model provides；
Fig. 3 is a kind of top view for knockout filter screen bracket that embodiment of the present utility model provides.
Embodiment
Further to illustrate that the utility model is to reach the technological means and effect that predetermined purpose of utility model taken,
Below in conjunction with accompanying drawing and preferred embodiment, to embodiment, structure, feature and its work(according to the present utility model application
Effect, describe in detail as after.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily same implementation
Example.In addition, the special characteristic, structure or feature in one or more embodiments can be combined by any suitable form.
Embodiment 1
The present embodiment provides a kind of knockout filter screen bracket, as shown in Figures 2 and 3, the knockout filter screen branch of the present embodiment
Frame includes rack body 5 and first through hole 53.Wherein, first through hole 53 is opened on rack body 5；Also, first through hole 53
It is interior to be provided with flow-guiding structure 531, for carrying out water conservancy diversion to liquid refrigerants.Wherein, first through hole 53 datum plane projection along
The circumferential direction extension of rack body 5；Also, first through hole 53 datum plane projection along the circumferential length of rack body 5
Degree is more than length of the projection along the radial direction of rack body 5.
Wherein, the datum plane in the present embodiment and following embodiments is where the planar section of the upper surface of rack body 5
Plane (that is, the planar section of rack body upper end as shown in Figure 3 in addition to convex closure 51).
The present embodiment provide knockout filter screen bracket by by the first through hole 53 provided with flow-guiding structure in datum plane
Projection along rack body 5 circumferential direction extension, when so making liquid refrigerants by first through hole 53, substantially along
What the circumference of rack body 5 flowed downward (that is, makes refrigerant be as far as possible in the projection of datum plane in first through hole flow path
Along the circumferential of rack body), so as to avoid refrigerant from rushing at knockout side wall.Therefore, the knockout filter that the present embodiment provides
Net support improves the liquid separation ability of knockout, reduces noise, extenuates pressure of inspiration(Pi) pulsation.
Embodiment 2
It is preferred that the present embodiment provides a kind of knockout filter screen bracket, compared with a upper embodiment, such as Fig. 2 and Fig. 3 institutes
Show, the first through hole 53 in the present embodiment includes the first hole wall；Wherein, the first hole wall is arranged to flow-guiding structure 531.Also, the
The upper end of one hole wall extends to the upper surface of rack body 5, and the lower end of the first hole wall is free end.This implementation need to only lead to first
The part hole wall in hole 53 is arranged to flow-guiding structure 531, without additionally mounted conducting element, so not only reduces cost, Er Qiebian
In processing.
It is preferred that the first hole wall (flow-guiding structure 531) forms concave cambered surface.Here, by the way that flow-guiding structure is arranged to
Concave cambered surface, it is good to the water conservancy diversion effect of liquid refrigerants, and can prevent liquid refrigerants from impacting knockout wall well.Preferably
Ground, the first hole wall form concave sphere.The upper end of first hole wall forms unclosed formula, and circular (including rule is circular, oval
Shape, irregular circle), unclosed formula is oval or any of unclosed formula polygon.
It is preferred that the hole wall of first through hole 53 also includes the second hole wall in addition to the first hole wall；Wherein, the second hole wall
Wall perpendicular to datum plane.
In addition, the forming method of the first through hole 53 of said structure is specific as follows：First through hole is in the upper of rack body 5
After carrying out strip gab (here, being not limited to bar shaped, or other shapes) on end, entered by pressing equipment in opening side
Row is stamped to form, i.e., the hole wall of the side of rack body 5 is flow-guiding structure, and the shape of flow-guiding structure and recessed degree are by punching press object
Shape and punching press distance determine.
Embodiment 3
It is preferred that the present embodiment provides a kind of knockout filter screen bracket, compared with above-described embodiment, such as Fig. 2 and Fig. 3 institutes
Show, when flow-guiding structure 53 (the first hole wall) is arranged to concave cambered surface, concave cambered surface has minimum point, and minimum point is located at
The lower end (minimum point of arc dotted line as shown in Figure 2) of first hole wall.Minimum point is projected as at first point datum plane；The
One hole wall upper end has and first point of most long second point (peak of arc dotted line as shown in Figure 2) of distance.Second point
It it is 10 ° -60 ° with the scope of the line of minimum point and the angle α of datum plane.It is preferred that when the first hole wall forms concave ball
During face, any point of the first hole wall upper end and first point of distance are equal, first hole wall upper end any point and most
The line of low spot and the angle of datum plane are α.
It is preferred that the second point and the line of minimum point and the angle α of datum plane of the first hole wall upper end are preferably
30°.Here, if α angles are too small, effective air-breathing area of first through hole is small, causes inspiratory resistance big.If angle is too big,
Difficulty of processing is big, and water conservancy diversion effect is weak.And α is arranged on into 30 ° can improve gettering ability, and can improves water conservancy diversion effect.
It is preferred that when flow-guiding structure 53 (the first hole wall) is arranged to concave cambered surface.As shown in figure 3, under the first hole wall
It is first straight line to hold the straight line where the both ends of datum plane projection.The upper surface of rack body 5 is in the projection of datum plane
The line of the heart and the first hole wall lower end at the midpoint at the both ends of the projection of datum plane is second straight line.Wherein, first straight line and
The angle of second straight line is β；Wherein, -30 °≤β≤30 °.Here, by being arranged such, can ensure well logical by first
The liquid refrigerants in hole 53 will not flow towards knockout madial wall.Preferably, β is equal to 0 °.By in this way, to realize liquid
Flow path of the state refrigerant in first through hole 53 is substantially along the circumference side of rack body 5 in the projection of datum plane
To；So as to prevent liquid refrigerants suction blast pipe or get on the wall of knockout, the liquid separation effect of knockout is lifted, and drop
Low noise.
Embodiment 4
The present embodiment provides a kind of knockout filter screen bracket, with knockout.As shown in Figures 2 and 3, rack body 5
On be additionally provided with the second through hole 52.Wherein, the second through hole 52 is at least one, for making refrigerant pass through rack body 5.
The present embodiment provide knockout filter screen bracket set with flow-guiding structure first through hole 53 on the basis of, then
One the second through hole 52 without flow-guiding structure is set.When the gaseous coolant of knockout upper cavity and the liquid refrigerants of convergence pass through second
When through hole 52 and first through hole 53, the second through hole 52 can effectively reduce inspiratory resistance, and first through hole 53 can add to refrigerant liquid
With water conservancy diversion, the gas-liquid separation effect of knockout is improved.Therefore, the knockout filter screen bracket that the present embodiment provides can improve liquid separation
The gas-liquid separation ability of device, and knockout inspiratory resistance is effectively reduced, extenuate pressure of inspiration(Pi) fluctuation.
It is preferred that the present embodiment and the center position of following embodiment medium-height trestle main bodys 5 form convex closure 51；With by liquid
Refrigerant water conservancy diversion enters in the second through hole 52 and first through hole 53 on rack body 5.
Embodiment 5
It is preferred that the present embodiment provides a kind of knockout filter screen bracket, compared with above-described embodiment, as described in Figure 3, this reality
Apply the second through hole 52 in example, first through hole 53 is multiple, and is evenly distributed on rack body.
It is preferred that the second through hole 52 and first through hole 53 are between the projection of datum plane is the circumference along rack body 5
Every setting.By in this way, per share refrigerant by the water conservancy diversion of first through hole 53 and obliquely can import it is adjacent by second
The water conservancy diversion of through hole 52 and in refrigerant under flowing to vertically, further mitigate harm of the refrigerant swash of wave to knockout barrel.
Embodiment 6
The present embodiment provides a kind of knockout, as shown in figure 1, the knockout of the present embodiment includes：Housing, suction line 2,
Knockout filter screen bracket (including rack body 5), screen pack described in gas exhaust piping, any of the above-described embodiment.Wherein, housing bag
Include upper shell 11, middle cylinder 12 and lower shell 13.Wherein, the upper end of upper shell 11 offers air entry, and suction line 2 connects
It is connected on air entry.The bottom of lower shell 13 offers exhaust outlet, and gas exhaust piping is connected on exhaust outlet.Gas exhaust piping includes
Exhaust straight tube 4 and exhaust elbow 3 in housing, wherein exhaust elbow 3 are connected with exhaust outlet.The lower end of exhaust straight tube 4 is set
There is 1-2 oil return opening 41.Suction line 2 and the material of exhaust elbow 3 are steel.
Operationally, refrigerant flows into knockout air-conditioning equipment from suction line 2, is vented straight tube 4 and screen modules (mistake
Filter screen and knockout filter screen bracket) cooperation liquid refrigerants is deposited to knockout bottom, and gaseous coolant is from exhaust straight tube 4
Inlet end enters in compressor pump, so as to prevent the phenomenon of liquid hammer compressor from occurring.Specifically, refrigerant first passes around air intake duct
Road 2, into the upper chamber of upper shell 11 and knockout filter screen bracket composition.After refrigerant enters upper chamber, due to cross-sectional flow
Area increases suddenly, and refrigerant flow rate drops to very low.Gaseous coolant is sucked through screen pack 6 and rack body 5 by exhaust straight tube 4；
Most of liquid refrigerants passes through rack body 5 again after forming larger drop by screen pack 6 " capture ".
Research finds that less refrigerant flow rate and less liquid storage amount can significantly improve screen modules (mistake in upper chamber
Filter screen and knockout filter screen bracket) liquid separation ability, that is, increase the diameter D that project in datum plane of rack body 5 and increase
The outlet side end face of suction line 2 and the distance S of datum plane.In order that refrigerant flow rate meets liquid separation requirement and takes into account cost
Influence, in the present embodiment preferably：0.3≤S/D≤0.6, more preferably S/D=0.34.
It is preferred that the circular arc chord length A of convex closure 51 is more than the diameter B of exhaust straight tube 4 on rack body 5, in this case, preferably
Ground A/B=1.4.It is preferred that (H too conferences increase absorbing gas belt for H for the suction end end face of exhaust straight tube 4 and the distance of datum plane
The possibility of liquid, it is too small, cause loss of suction).0.04≤H/D≤0.17, preferably H/D=0.11, in this way, one can be entered
Liquid separation ability is ensure that to step, finally avoids absorbing gas belt liquid from endangering compressor and lifting system performance, while reduce noise.
In summary, the present embodiment provide knockout filter screen bracket by by the first through hole provided with flow-guiding structure in base
Circumferential direction extension of the projection of directrix plane along rack body, when the liquid refrigerants is passed through first through hole, substantially
Circumferentially flowed downward along rack body, so as to avoid refrigerant from rushing at knockout side wall.Therefore, the liquid separation that the present embodiment provides
Device filter screen bracket improves the liquid separation ability of knockout, reduces noise, extenuates pressure of inspiration(Pi) pulsation.
To sum up, it will be readily appreciated by those skilled in the art that on the premise of not conflicting, above-mentioned each advantageous manner can be certainly
Combined, be superimposed by ground.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, any simple modification, equivalent change and modification made to above example according to the technical essence of the utility model,
In the range of still falling within technical solutions of the utility model.
Claims (14)
1. a kind of knockout filter screen bracket, it is characterised in that the knockout filter screen bracket includes：
Rack body；
First through hole, the first through hole are opened on the rack body；Also, it is provided with water conservancy diversion knot in the first through hole
Structure, for carrying out water conservancy diversion to refrigerant；
Wherein, the first through hole datum plane projection along the rack body circumferential direction extension；It is also, described
First through hole is more than along the rack body radial direction in the projection of datum plane along the circumferential length of the rack body
Length；
Wherein, the datum plane is the plane where the planar section of rack body upper surface.
2. knockout filter screen bracket according to claim 1, it is characterised in that the first through hole includes the first hole wall；
Wherein,
First hole wall is arranged to the flow-guiding structure；Also, the upper end of first hole wall extends to the rack body
Upper surface, the lower end of first hole wall is free end.
3. knockout filter screen bracket according to claim 2, it is characterised in that first hole wall forms concave arc
Face；And/or
The upper end of first hole wall formed unclosed formula circular, unclosed formula is oval or unclosed formula polygon in appoint
It is a kind of.
4. knockout filter screen bracket according to claim 3, it is characterised in that when first hole wall forms concave arc
During face, the first hole wall lower end straight line where the both ends that the datum plane projects is first straight line；
The rack body projects at the center that the datum plane projects and the first hole wall lower end in the datum plane
The line at midpoint at both ends be second straight line；
Wherein, the angle of the first straight line and second straight line is β；Wherein, -30 °≤β≤30 °.
5. knockout filter screen bracket according to claim 4, it is characterised in that the folder of the first straight line and second straight line
Angle beta is 0 °.
6. knockout filter screen bracket according to claim 3, it is characterised in that when first hole wall forms concave arc
During face, the concave cambered surface has minimum point, and the minimum point is located at the lower end of first hole wall；
Wherein, the minimum point is projected as at first point in the datum plane；The first hole wall upper end have with it is described
First point of most long second point of distance；
Wherein, the angle of the second point and the line of minimum point and the datum plane is α；Wherein, 10 °≤α≤60 °.
7. knockout filter screen bracket according to claim 6, it is characterised in that the second point and the line of minimum point with
The angle α of the datum plane is 30 °.
8. according to the knockout filter screen bracket described in claim any one of 1-7, it is characterised in that also opened on the rack body
Provided with least one second through hole, for making refrigerant pass through the rack body.
9. knockout filter screen bracket according to claim 8, it is characterised in that the first through hole and the second through hole are in institute
The projection for stating datum plane is the circumferentially-spaced setting along the rack body.
10. according to the knockout filter screen bracket described in claim any one of 1-7, it is characterised in that in the rack body
Heart opening position forms convex closure.
11. a kind of knockout, it is characterised in that the knockout includes the knockout filter screen described in claim any one of 1-10
Support.
12. knockout according to claim 11, it is characterised in that the housing of the knockout is provided with exhaust outlet, and
Gas exhaust piping is connected with the exhaust outlet；Wherein,
When the rack body of the knockout filter screen bracket is provided with convex closure, the circular arc chord length of the convex closure is more than the exhaust
The diameter of pipeline inlet end.
13. knockout according to claim 12, it is characterised in that
The end face of the inlet end of the gas exhaust piping and the distance of the datum plane are H；
A diameter of D of the rack body in the projection of the datum plane；
Wherein, 0.04≤H/D≤0.17.
14. knockout according to claim 11, it is characterised in that air entry is offered on the housing of the knockout,
And it is connected with suction line on the air entry；Wherein,
The end face of the outlet side of the suction line and the distance of the datum plane are S；
A diameter of D of the rack body in the projection of the datum plane；
Wherein, 0.3≤S/D≤0.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720501482.8U CN206847142U (en) | 2017-05-08 | 2017-05-08 | A kind of knockout filter screen bracket and knockout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720501482.8U CN206847142U (en) | 2017-05-08 | 2017-05-08 | A kind of knockout filter screen bracket and knockout |
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| Publication Number | Publication Date |
|---|---|
| CN206847142U true CN206847142U (en) | 2018-01-05 |
Family
ID=60795113
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| CN201720501482.8U Active CN206847142U (en) | 2017-05-08 | 2017-05-08 | A kind of knockout filter screen bracket and knockout |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979637A (en) * | 2017-05-08 | 2017-07-25 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of knockout filter screen bracket and knockout |
-
2017
- 2017-05-08 CN CN201720501482.8U patent/CN206847142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979637A (en) * | 2017-05-08 | 2017-07-25 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of knockout filter screen bracket and knockout |
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