Device for drying and filtering
Technical field
The present invention relates to filter technology field, particularly a kind of device for drying and filtering.
Background technology
Device for drying and filtering comprises unidirectional, two-way device for drying and filtering, is usually used in air-conditioning system, has double action that is dry and that filter, can filter the impurity of fluid, and absorb moisture, prevent impurity and moisture from entering the critical component of air-conditioning system.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is a kind of front view of typical two-way device for drying and filtering, and refrigerant flow path is shown; Fig. 2 is a kind of front view of typical unidirectional device for drying and filtering, and refrigerant flow path is shown.
Arrow in Fig. 1 and Fig. 2 represents the glide path of refrigerant in the device for drying and filtering of correspondence, only indicates the situation for right side flows in figure, left side is flowed out, and the situation flowed out from left side inflow, right side is similar.In unidirectional device for drying and filtering, the conventional path of refrigerant circulation is: refrigerant flows in end cap 100 through inlet tube 900, filter 700 through import department flows to filtration core 300, flow to filter 700, screen pack 600, the backstop 500 of outlet side from filtration core 300 inside, finally flow out device for drying and filtering from outlet 800.
Filtration core 300 is strength members of device for drying and filtering, is bonded together, and become the structure with profile by short grained global molecular.The filter 700 of filtration core 300 both sides is made up of mineral wool, is a kind of flexible structure with good fluffy degree, is located by backstop 500.As shown in Figure 1, 2, end cap 100 has the kink 101 of overcoat body 400, and this kink 101 welds and sealing two-way device for drying and filtering with body 400.In assembling and welding process, filtration core 300 is vulnerable to by the pressure firmly contacting or weld generation, and filter 700 plays the effect of protection filtration core 300, makes filtration core 300 not easily fragmentation occur.
Please refer to Fig. 3, Fig. 3 is the stereogram of device for drying and filtering in Fig. 1, illustrates that right one-way valve member is installed in two-way device for drying and filtering.
The more unidirectional device for drying and filtering of two-way device for drying and filtering, also has the one-way valve member 200 between outlet 800 and backstop 500, and the one-way valve member 200 that inlet side is arranged symmetrically with it, and above-mentioned each parts are all outer to be enclosed within body 400 and end cap 100.
Please refer to Fig. 4, Fig. 4 is the decomposition texture schematic diagram of one-way valve member in Fig. 3.
This one-way valve member 200 comprises rivet 201, spring 202, catch 203, support plate 204, reed 205, stage clip 206, bracket 207, support plate 204 has the inlet hole 200a for refrigerant circulation and the 200b that portals, rivet 201 runs through after spring 202 and catch 203, support plate 204 carry out first riveted joint, reed 205 coordinates with stage clip 206, opens or close inlet hole 200a under the promotion of refrigerant; Bracket 207, stage clip 206, reed 205, support plate 204 are fixing by second riveted joint, and catch 203 can move along refrigerant flow direction relative to support plate 204, open or close the 200b that portals; Namely above-mentioned backstop 500 is installed in the bracket 207 of one-way valve member 200.
In two-way device for drying and filtering, one-way valve member 200 is the vitals realizing refrigerant two-way flow, and impurity and moisture can also be trapped in two-way device for drying and filtering by this one-way valve member 200, do not affect air-conditioning system work.But the component part of one-way valve member 200 is more, assembling is complicated: it needs through above-mentioned twice riveting operation, and reed 205, stage clip 206, bracket 207 all aim at support plate 204 one by one by locating hole, and assembling process is complicated, inefficiency; For realizing the location to filtration core 300, need bracket 207 to coordinate with backstop 500, design is complicated, and cost is higher.
Please refer to Fig. 5 and Fig. 6, when Fig. 5 is the one-way valve member inflow on refrigerant right side from Fig. 3, the structural representation of this one-way valve member; When Fig. 6 is the one-way valve member outflow in refrigerant left side from Fig. 3, the structural representation of this one-way valve member.
Composition graphs 1, Fig. 5 and Fig. 6, in two-way device for drying and filtering, the conventional path of refrigerant circulation is as follows: flow to one-way valve member 200 by inlet tube 900, by the inlet hole 200a on support plate 204, push reed 205 (as shown by the arrows in Figure 5) open, from the gap flowed between bracket 207 and support plate 204 between filtration core 300 sidewall and body 400, auto-steering filtration core 300 after circulation certain distance, and the screen pack 600 of offside is flowed to through filtration core 300, refrigerant is after filter core 300 and screen pack 600 filter, it is inner that impurity and moisture are all blocked in two-way device for drying and filtering, refrigerant after filtration is by the 200b that portals (as shown by the arrows in Figure 6) of one-way valve member 200, push catch 203 open, then two-way device for drying and filtering is flowed out.
Please refer to Fig. 7, Fig. 7 is the wrong glide path schematic diagram of refrigerant in two-way device for drying and filtering.
In practical set, due to part tolerance accumulation, and filter 700 is flexible material, and under the state compressed, filter 700 place still exists certain gap, this gap comprises the fibre gap of filter 700 self, and the fit clearance of one-way valve member 200 and filtration core 300.Because the resistance of filter 700 place to refrigerant is less, so refrigerant not turns to filtration core 300 after flowing through the gap of above-mentioned filtration core 300 sidewall and body 400, but still continue this path and directly flow to the less filter 700 of the resistance of offside, leak out air-conditioning system from this gap.
Please refer to Fig. 8, Fig. 8 is the wrong glide path schematic diagram of refrigerant in unidirectional device for drying and filtering.
Similar with two-way device for drying and filtering, refrigerant easily passes through the filter 700 of import department to the Clearance Flow between filtration core 300 lateral wall and body 400, and the filter 700 of outlet side is directly flowed to by this gap, reveal from filter 700, through filter screen 600, flow out unidirectional device for drying and filtering from outlet 800.
To cause secondary refrigerant leakage, namely above-mentioned unconventional glide path is called leakage gap.
There is following shortcoming in above-mentioned typical device for drying and filtering:
The first, refrigerant not through the filtration of filtration core 300, but by means of only after filter 700 and screen pack 600, directly flows out this two-way device for drying and filtering.This error flow is to causing the dry filter function of filtration core 300 internal particle not to be utilized, and the utilization rate of filtration core 300 is lower, and the filter effect of refrigerant is poor.
Second, the refrigerant of above-mentioned liquid form will increase the live load of screen pack 600 and filter 700, and, granule impurity can not be filtered sheet 700 and filter, to be gathered in the exit at filter 700 center through filter 700, after impurity bulk deposition, this place's pressure will sharply rise, cause filter 700 lost of life, damage even completely; Thus affect the service life of device for drying and filtering;
3rd, screen pack 600, filter 700 and backstop 500 installation procedure are complicated, and parts are more, and cost is higher.
In sum, how can avoid refrigerant occur above-mentioned error flow to, effectively utilize the dry filter effect of filtration core, improve filter quality and the filter efficiency of refrigerant, and on the basis in service life not affecting device for drying and filtering, simplifying structure, reduce costs, is those skilled in the art's technical issues that need to address.
Summary of the invention
Object of the present invention is for providing a kind of device for drying and filtering.This device for drying and filtering can avoid refrigerant to make a mistake the flow direction, effectively utilizes the dry filter effect of filtration core, improves filter quality and the filter efficiency of refrigerant, under the prerequisite in service life not affecting device for drying and filtering, simplifies structure, reduce costs.
For solving the problems of the technologies described above, the invention provides a kind of device for drying and filtering, comprise the outer race section of filtration core described in filtration core and overcoat, also comprise the elastic sealing strip be arranged between described outer race section and described filtration core end face, the leakage gap of described both elastic sealing strip shutoff.
Above-mentioned design has following advantage:
The first, force refrigerant cannot flow out device for drying and filtering by other paths along conventional path flowing, then effectively utilize the dry filter effect of filtration core, improve filter quality and the filter efficiency of refrigerant;
Second, refrigerant is while filtration core, its inner impurities is filtered, there is not the problem of impurities accumulation in the exit of filter, because this elastic sealing strip has resiliency characteristics, it can protect filtration core not to be subject to colliding with of the metal materials such as outer race section, cushions the impact to filtration core, can not have an impact to the service life of device for drying and filtering;
3rd, the resiliency characteristics of elastic sealing strip dependence self, during with filtration core end contact, be under pressure and will deform, and the un-compressed part in both sides has positioning function by automatically surrounding filtration core sidewall, then substitute filter structure, simplify structure, simplify installation procedure, reduce costs.
Preferably, described elastic sealing strip comprises fixed part and location division, the end face of filtration core described in described fixed part shutoff and the gap of described outer race section, and described location division extends along the axis of described filtration core from described fixed part, and fits with described filtration core sidewall.
Preferably, the sidewall of described filtration core and the root of described location division have gap, with the head interference fit of described location division.
Preferably, also comprise the first housing and the second housing, the two includes the end cap of filtration core end face described in capping, and the body of filtration core lateral wall described in overcoat, described end cap and described body one-body molded; Described first housing is connected in the edge seal of described body with described second housing.
Preferably, also comprise one-way valve member, described fixed part fits in the support plate of described one-way valve member; Described elastic sealing strip also comprises the movable part extended in its plane from the outer rim of described fixed part, and described movable part hides the inlet hole of described one-way valve member, and can open described inlet hole under the promotion of refrigerant.
Preferably, described fixed part has the first location division, and described support plate has the second location division, and described first location division coordinates with described second location division, to make described elastic sealing strip relatively described one-way valve member radial direction fixing.
Preferably, described first location division for being arranged at described fixed part, and to the flange that described support plate protrudes; Described second location division for being arranged at described support plate medial surface, towards the groove that described fixed part is open.
Preferably, described first location division for being arranged at described fixed part, towards the groove that described support plate is open; Described second location division for being arranged at described support plate medial surface, to the flange that described fixed part protrudes.
Preferably, described inlet hole is distributed in the throughput of described support plate equably, is netted to make described throughput.
Preferably, the throughput of described support plate has the some ribs radially extended, and described rib splits described throughput, to form described inlet hole.
Accompanying drawing explanation
Fig. 1 is a kind of front view of typical two-way device for drying and filtering, and refrigerant flow path is shown;
Fig. 2 is a kind of front view of typical unidirectional device for drying and filtering, and refrigerant flow path is shown;
Fig. 3 is the stereogram of device for drying and filtering in Fig. 1, illustrates that right one-way valve member is installed in two-way device for drying and filtering;
Fig. 4 is the decomposition texture schematic diagram of one-way valve member in Fig. 3;
When Fig. 5 is the one-way valve member inflow on refrigerant right side from Fig. 3, the structural representation of this one-way valve member;
When Fig. 6 is the one-way valve member outflow in refrigerant left side from Fig. 3, the structural representation of this one-way valve member;
Fig. 7 is the wrong glide path schematic diagram of refrigerant in two-way device for drying and filtering;
Fig. 8 is the wrong glide path schematic diagram of refrigerant in unidirectional device for drying and filtering;
Fig. 9 is a kind of detailed description of the invention schematic diagram of two-way device for drying and filtering provided by the invention;
Figure 10 is a kind of detailed description of the invention schematic diagram of unidirectional device for drying and filtering provided by the invention;
Figure 11 is the mounting structure schematic diagram of filtration core, elastomeric element, one-way valve member in Fig. 9;
Figure 12 is the perspective view of a kind of detailed description of the invention of elastic sealing strip in Fig. 9, Figure 10, Figure 11;
Figure 13 is the assembling schematic diagram of elastic sealing strip in Figure 12 and support plate;
Figure 14 is the structural representation of a kind of detailed description of the invention of support plate in Figure 13;
Figure 15 is the structural representation of the another kind of detailed description of the invention of support plate in Figure 13.
Fig. 1-Fig. 8:
End cap 100, kink 101, one-way valve member 200, inlet hole 200a, the 200b that portals, rivet 201, spring 202, catch 203, support plate 204, reed 205, stage clip 206, bracket 207, filtration core 300, body 400, backstop 500, screen pack 600, filter 700, outlet 800, inlet tube 900
Fig. 9-Figure 15:
Body 10, end cap 20, filtration core 30, filter 40, one-way valve member 50, support plate 501, groove 5010, inlet hole 502, throughput 503, throughput outer rim 5031, throughput inner edge 5032, rib 504, elastic sealing strip 60, fixed part 601, flange 6010, location division 602, head 6021, root 6022, movable part 603, movable part inner edge 6031, movable part outer rim 6032, screen pack 70
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 9 and Figure 10, Fig. 9 is a kind of detailed description of the invention schematic diagram of two-way device for drying and filtering provided by the invention; Figure 10 is a kind of detailed description of the invention schematic diagram of unidirectional device for drying and filtering provided by the invention.
Device for drying and filtering provided by the invention comprises the outer race section of filtration core 30 and this filtration core 30 of overcoat, in the present embodiment, this outer race section refers to all parts surrounding filtration core 30, comprise, body 10, end cap 20 and each workpiece, as screen pack 70, filter 40, backstop, one-way valve member 50 etc.This outer race section also has the outlet of flowing out for refrigerant, correspondingly, outer race section is provided with import along axial, corresponding with this outlet side of filtration core 30, this outlet can only be positioned on an above-mentioned workpiece, also can be positioned on above-mentioned some workpieces simultaneously, and become a part for the conventional path of the refrigerant circulation described in background technology.
Elastic sealing strip 60 is provided with, the leakage gap between this elastic sealing strip 60 shutoff filtration core 30 and outer race section between the end face of filtration core 30 and outer race section.Should be appreciated that this leakage gap refers to the gap except above-mentioned conventional path, the existence of this elastic sealing strip 60 can not hinder the proper flow of refrigerant in device for drying and filtering.
Above-mentioned elastic sealing strip 60 can have various structures form, such as, it can be the special parts only with sealing function arranged, also can by changing the version, material etc. of above-mentioned each workpiece, and form this elastic sealing strip 60, namely this elastic sealing strip 60 both had sealing function, had again the service behaviour of workpiece.
Elastic sealing strip 60 is by after the leakage gap shutoff of outer race section and filtration core 30, and refrigerant directly cannot flow to outlet along this gap, namely avoid error flow in background technology to, and automatically flow through filtration core 30 along conventional path, flow out from outlet.
As shown in Figure 9, in two-way device for drying and filtering, the flow direction of refrigerant is as follows: enter the gap between filtration core 30 sidewall and body 10 by the one-way valve member 50 inside end cap 20, due to this gap to the path of side outlet by seal member shutoff, refrigerant, by auto-steering filtration core 30, flows to outlet from filtration core 30.
As shown in Figure 10, in unidirectional device for drying and filtering the flow direction of refrigerant and two-way device for drying and filtering similar: after entering device for drying and filtering from the filter 40 inside end cap 20, first the gap between filtration core 30 sidewall and body 10 is entered, then turn to filtration core 30, pass through to outlet from filtration core 30.
Above-mentioned design has following advantage:
The first, force refrigerant cannot flow out device for drying and filtering by other paths along conventional path flowing, then effectively utilize the dry filter effect of filtration core 30, improve filter quality and the filter efficiency of refrigerant;
Second, refrigerant is while filtration core 30, its inner impurities is filtered, there is not the problem of impurities accumulation in the exit of filter, because this elastic sealing strip 60 has resiliency characteristics, it can protect filtration core 30 not to be subject to colliding with of the metal materials such as outer race section, cushions the impact to filtration core 30, can not have an impact to the service life of device for drying and filtering;
3rd, elastic sealing strip 60 relies on self resiliency characteristics, during with filtration core 30 end contact, be under pressure and will deform, and the un-compressed part in both sides has positioning function by automatically surrounding filtration core 30 sidewall, then substitute filter structure, simplify structure, simplify installation procedure, reduce costs.
In a preferred embodiment, this elastic sealing strip 60 has fixed part 601 and location division 602, this fixed part 601 is between outer race section and filtration core 30 end face, and elastic sealing strip 60 passes through the gap of this fixed part 601 shutoff filtration core 30 end face and outer race section.Self-retaining portion, location division 602 601 extends along the axis of filtration core 30, and fits with filtration core 30 sidewall.
For unidirectional device for drying and filtering, this outer race section is specifically as follows screen pack 70 or end cap 20, when screen pack 70 fits in filtration core 30 end face, then fit with screen pack 70 and end cap 20 respectively in fixed part 601 two sides, certainly, screen pack 70 also can be arranged between fixed part 601 and end cap 20, then fit with screen pack 70 and filtration core 30 end face respectively in fixed part 601 two sides.
Please refer to Figure 11, Figure 11 is the mounting structure schematic diagram of filtration core, elastomeric element, one-way valve member in Fig. 9.
For two-way device for drying and filtering, this outer race section is specifically as follows the support plate 501 of screen pack 70 or one-way valve member 50, when screen pack 70 fits in filtration core 30 end face, then fit with support plate 501 and screen pack 70 respectively in fixed part 601 two sides, certainly, screen pack 70 also can be arranged between support plate 501 and fixed part 601, then fit with screen pack 70 and filtration core 30 end face respectively in fixed part 601 two sides.
Location division 602 being set specially, for limiting moving radially of filtration core 30, improving reliability of positioning.Further, screen pack 600 can also be arranged between filtration core 30 end face and elastic sealing strip 60, thus cancel backstop structure.So, then this elastic sealing strip 60 substitutes filter of the prior art and backstop completely, and becomes the workpiece of device for drying and filtering, saves material cost, simplifies the structure of device for drying and filtering simultaneously.
In addition, location division 602 and the one-body molded the best of fixed part 601, now, without the need to being connected by miscellaneous part, make elastic sealing strip 60 globality better, installation and maintenance of being more convenient for.Certainly, the two is fixed by attaching parts, or is adhesively fixed and also can.
Please refer to Figure 12, Figure 12 is the perspective view of a kind of detailed description of the invention of elastic sealing strip in Fig. 9, Figure 10, Figure 11.
In another preferred embodiment, above-mentioned location division 602 can also with the sidewall interference fit of filtration core 30, the root 6022 of location division 602, namely location division 602 and the link of fixed part 601, have gap with filtration core 30 sidewall; The head 6021 of location division 602, namely location division 602 is away from one end of fixed part 601, with filtration core 30 sidewall interference fit.As shown in figure 12, this location division 602 can be formed by following manner: first, and the radial thickness of location division 602 is increasing gradually along in the axially extended process of filtration core 30, makes location division 602 have gap from filtration core 30 sidewall, extremely with its laminating, until have certain magnitude of interference with it; Afterwards, location division 602 keeps its radial thickness constant, and continues the end face extending to its head 6021.
Location division 602 and fixed part 601 are set with filtration core 30 jointly, and be mainly interference fit relation with filtration core 30, after above-mentioned design, location division 602 can be contained in above-mentioned gap with the deflection of fixed part 601, the junction of the two is caused to destroy due to distortion by avoiding, make elastic sealing strip 60 version more reasonable, service life is longer.
In this embodiment, location division 602 is made up of oblique section and straight section, certainly, can also all be designed to oblique section, and namely location division 602 is from its root 6022 to its head 6021 convergent etc.
In above-mentioned two kinds of embodiments, location division 602 is arranged at for good between the lateral wall of filtration core 30 and outer race section, and so, the effect that protection filtration core 30 does not collide with outer race section can also be played in this location division 602.Certainly, the madial wall being arranged at filtration core is also fine.
In conjunction with Figure 11, exit is had to the device for drying and filtering of one-way valve member 50, this elastic sealing strip 60 is fitted by fixed part 601 and support plate 501, during assembling, flow direction along refrigerant is furnished with filtration core 30 successively, screen pack 70, elastic sealing strip 60 and support plate 501, certainly, elastic sealing strip 60 also can between filtration core 30 and screen pack 70, namely, filtration core 30 is furnished with successively along refrigerant flow direction, elastic sealing strip 60, screen pack 70 and support plate 501, as long as the change of screen pack 70 position does not affect the filtration of device for drying and filtering to refrigerant.
The elastic sealing strip 60 coordinated with above-mentioned device for drying and filtering can also have movable part 603, outer rim planar the extending at fixed part 601 in described movable part 603 self-retaining portion 601, until hide the inlet hole 502 of one-way valve member 50, under the promotion of refrigerant, this movable part 603 can open described inlet hole 502.This movable part 603 can be a ring slice, it has, and size is less, adjacent with fixed part 601 movable part inner edge 6031, with larger-size, away from the movable part outer rim 6032 of fixed part 601, one and the support plate 501 of this movable part outer rim 6032 or movable part inner edge 6031 are fixed, and the relative support plate 501 of another one can be freely movable.
This movable part inner edge 6031 relatively support plate 501 is fixed, under the promotion of refrigerant, movable part outer rim 6032 drives movable part 603 to open perforate, obviously, after arranging this movable part 603, save the stage clip of one-way valve member 50, reed and bracket, and refrigerant still can be made to enter device for drying and filtering, so, then the structure of one-way valve member 50 is simplified, size reduces, and saves material cost; Further, only need once to rivet rivet, catch, support plate 501, simplify working procedure.
Fixing movable part inner edge 6031 has multiple with the method for support plate 501, such as, movable part 603 is one-body molded with fixed part 601, because fixed part 601 is press-fited between support plate 501 and the end face of filtration core 30, then its relative support plate 501 is fixed, so, then movable part inner edge 6031 also relatively support plate 501 fix; Movable part 603 and fixed part 601 can also be arranged in split, and movable part inner edge 6031 is bonding with support plate 501 etc.
This movable part 603 can also have other versions except ring slice, as the lamellar body etc. corresponding with each perforate respectively that split is arranged, even, also can not arrange this movable part 603, and continues to adopt the structures such as similar stage clip, reed.
Please refer to Figure 13, Figure 13 is the assembling schematic diagram of elastic sealing strip in Figure 12 and support plate.
In another embodiment, fixed part 601 can also have the first location division, support plate 501 has the second location division coordinated with the first location division, and the two jointly limits the relative one-way valve member 50 of elastic sealing strip 60 and moves radially, and plays the radial location effect to elastic sealing strip 60.
Particularly, above-mentioned first location division can for being arranged at the flange 6010 of the fixed part 601 of elastic sealing strip 60, this flange 6010 protrudes to support plate 501 direction, then the second positioning element is the groove 5010 be positioned on support plate 501, this groove 5010 is open towards described flange 6010, and the two cooperation realizes above-mentioned positioning action.
Or flange is arranged at support plate 501, and protrudes to fixed part 601, groove is arranged at fixed part 601, open towards support plate 501, this groove and flange are worked in coordination and are realized positioning action.
When processing flange 6010 and groove 5010, different according to its shape, select suitable mould, by better simply technique, good locating effect can be obtained.
Certainly, this first location division, the second location division can also be other versions, and e.g., the two coordinates with the form of rotary clamping etc., as long as can make elastic sealing strip 60 and support plate 501 radial location.
Please refer to Figure 14 and Figure 15, Figure 14 is the structural representation of a kind of detailed description of the invention of support plate in Figure 13; Figure 15 is the structural representation of the another kind of detailed description of the invention of support plate in Figure 13.
As shown in Figure 14 and Figure 15, the throughput 503 of support plate 501 offers the inlet hole 502 flowed into for refrigerant, this inlet hole 502 can be distributed in this throughput 503 evenly, thick and fast, finally, makes this throughput 503 in netted.
Or this inlet hole 502 can be formed by following method: arrange some ribs 504 in throughput 503 radial direction, adjacent each rib 504 surrounds above-mentioned inlet hole 502 with throughput outer rim 5031 and throughput inner edge 5032.Now, the size of this inlet hole 502 is comparatively large, and throughput 503 most areas is the inlet hole 502 entered for refrigerant, and only rib 504 place place stops that refrigerant passes through.
In above-mentioned two schemes, support plate 501 all has larger circulation area, and such being designed with is beneficial to and reduces refrigerant flow resistance, thus improves the operating efficiency of device for drying and filtering.
In above-mentioned each scheme, all can do further improvement to device for drying and filtering:
As shown in Figure 9, device for drying and filtering can be provided with the first housing and the second housing, and the two includes the end cap 20 of capping filtration core 30 end face, and the body 10 of overcoat filtration core 30 lateral wall, this end cap 20 is one-body molded with body 10, and also namely the first housing and the second housing are monolithic construction.After the filtration core 30 of device for drying and filtering and workpiece etc. having been assembled, the edge in the first housing and the second housing has sealed.
So, cancel the design of bending part, pad is moved in the middle of filtration core 30, avoid the structural failure that welding active force produces elastic sealing strip 60.
It should be noted that, above described elastic sealing strip 60 all can be made up of elastomeric material, also can be comparatively large and have flexible material and make by density.
Above a kind of device for drying and filtering provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.