CN101205895A - Heater for compressor and compressor containing said heater - Google Patents
Heater for compressor and compressor containing said heater Download PDFInfo
- Publication number
- CN101205895A CN101205895A CNA2007100913077A CN200710091307A CN101205895A CN 101205895 A CN101205895 A CN 101205895A CN A2007100913077 A CNA2007100913077 A CN A2007100913077A CN 200710091307 A CN200710091307 A CN 200710091307A CN 101205895 A CN101205895 A CN 101205895A
- Authority
- CN
- China
- Prior art keywords
- compressor
- strap
- heater
- button parts
- detection unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002309 gasification Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001007 puffing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G3/00—Belt fastenings, e.g. for conveyor belts
- F16G3/003—Apparatus or tools for joining belts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compressor (AREA)
Abstract
The present invention provides a heater for compressor, especially relates to a heater for simplifying fluid refrigerant gasification flowing to the interior of the compressor and heater for detecting the installation course of the detecting unit of the refrigerant temperature of the interior of the compressor interior. According to the invention, the compressor comprises, a compressor case; a detecting unit connected with the peripheral surface of the compressor case; a heater surrounding the peripheral surface of the compressor case for gasifying liquid refrigerant flowing in the compressor case; a setting unit of the detecting unit set on the heater for setting the detecting unit.
Description
Technical field
The present invention relates to the compressor heater, the present invention can simplify the heater that makes the liquid refrigerant gasification that flow into compressor inside and be used to measure the installation process of detection unit of the refrigerant temperature of compressor inside.
Background technique
The compressor that existing invention provided be provided with around the strip heater 3 of compressor 1 housing 2 bottoms with separate with described heater 3 and be located at described heater 3 tops and be used to measure the refrigerant temperature of compressor 1 inside and the detection unit 10 of pressure.Described detection unit 10 is a cylindrical shape, supported by Steel Support 12, and support 12 two ends is fixed on the outer circumferential face of compressor 1 housing 2 by first wind spring (coil spring) 15.
In addition, described heater 3 comprises silicon material strap 5 around compressor 1 housing 2 outer circumferential faces, is located at the inner electrically-heated-wire 6 that plays heating functioins of strap 5 and is connected with electrically-heated-wire 6 and to the electric wire portion 7 of electrically-heated-wire 6 power supplies.
In addition because the length of strap 5 is less than the girth of compressor 1 housing 2, so need to adopt connected element, be used to connect the two ends of strap 5 and fixedly strap 5 prevent its landing.This connected element is made of second wind spring 20 in the existing invention, and strap 5 two ends be provided with can tie down second wind spring, 20 two ends fasten the button 8, two of parts fasten the button parts 8 all be arranged on strap 5 outsides.
Because aforesaid structure need install heater 3 and detection unit 10 respectively, therefore can prolong the installation time, and, therefore be unfavorable for reducing manufacture cost owing to will use two wind springs and be provided with and only be used for the support 12 of installation and measuring portion 10.
And, also exist electric wire may be wrapped in first wind spring 15 or second wind spring 20 to electrically-heated-wire 6 power supplies, perhaps may contact and cut hidden danger with support 12 edge sections of fixed test portion 10.
Summary of the invention
The present invention proposes the cost that its purpose is to reduce the installation time of heater and detection unit and required parts are installed in order to solve aforesaid problem.
And, another object of the present invention is to eliminate in advance the electric wire portion that is connected with electrically-heated-wire and snarled or cut danger because of contacting with other constituting components.
To achieve these goals, comprise according to compressor provided by the present invention: compressor housing; The detection unit that contacts with the outer circumferential face of described compressor housing; Surround the heater of described compressor housing outer circumferential face, be used to make the liquid refrigerant gasification that flow into described compressor inside; The detection unit that is arranged on the described heater is provided with portion, is used to be provided with described detection unit.
And, described heater comprises the strap that surrounds described compressor housing outer circumferential face and is housed in the electrically-heated-wire of described strap inside, described detection unit is provided with portion and is made of the patchhole that is arranged on described strap one end, this patchhole separates with described electrically-heated-wire, fixes to be used to inserting described detection unit.
And, the length of described strap is less than the girth of described compressor housing outer circumferential face, described strap two ends are provided with fastens the button parts, and this is fastened the button parts and is used to tie down connected element, and this connected element is used to connect described strap two ends and makes described strap be fixed in the housing outer circumferential face.
And described strap one end is provided with first and fastens the button parts, and the described strap the other end is provided with second and fastens the button parts, and described first fastens the button parts is arranged on described strap inner face, and described second fasten the button parts and be arranged on described strap outside to stagger mutually.
Compressor provided by the present invention also comprises the electric wire portion that is connected with described electrically-heated-wire and extends to described strap outside, the link position of described electric wire portion is fastened and is buckled the parts branch and be arranged with being used for fixing described first of connected element, interferes to prevent described electric wire portion and described connected element.
And described patchhole is arranged on described electrically-heated-wire and described second and fastens between the button parts.
And described connected element is made of the wind spring that hook is set at two ends.
Comprise with heater according to compressor provided by the present invention: with the contacted detection unit of the outer circumferential face of compressor housing; Surround described compressor housing outer circumferential face and insert the strap of described detection unit; Be housed in the electrically-heated-wire of described strap inside, make the refrigeration agent gasification to be used to heating described compressor housing.
And described strap is provided with and is used to insert the patchhole that described detection unit is fixed.
And the length of described strap is less than the girth of described compressor housing outer circumferential face, and described strap two ends are connected with connected element, and this connected element is used to connect described strap makes described strap be fixed on described compressor housing outer circumferential face.
And, comprise to be arranged on described strap one end and to tie down first of described connected element one end and fasten the button parts, be arranged on the described strap the other end and tie down second of the described connected element the other end and fasten the button parts, described first fastens the button parts is arranged on described strap inner face, and described second fasten the button parts and be arranged on described strap outside.
And described strap is provided with the electric wire portion that electric current is provided to described electrically-heated-wire, and described electric wire portion and described first fastens and buckles the parts branch and be arranged, and interferes mutually to prevent described electric wire portion and described connected element.
And described patchhole is arranged on described electrically-heated-wire and described second and fastens between the button parts.
And described connected element is made of the wind spring that hook is set at two ends.
Description of drawings
Fig. 1 is the side view of expression prior art;
Fig. 2 is the side view of expression heater provided by the present invention and detection unit;
Fig. 3 is the schematic representation of heater provided by the present invention and detection unit;
Fig. 4 is a control block diagram of the present invention;
Fig. 5 is the air conditioner skeleton diagram that is provided with heater provided by the present invention and detection unit.
Main symbol description: 33 is heater, and 34 is strap, and 35 is electrically-heated-wire, and 36 is electric wire portion, and 40 is wind spring, and 41a first fastens the button parts, and 41b second fastens the button parts, and 45 is detection unit, and 48 is patchhole.
Embodiment
Describe the preferred embodiments of the present invention with reference to the accompanying drawings in detail.
As shown in Figure 2, the housing 32 lower, outer perimeter faces of compressor 30 are provided with heater 33, and detection unit 45 is inserted in the described heater 33 and is fixed.
Described heater 33 comprises: strap 34, housing 32 outer circumferential faces that this strap 34 forms the outward appearance of described heater 33 and twines described compressor 30; Electrically-heated-wire 35, this electrically-heated-wire 35 are arranged on 34 inner heating functioins of described strap, thereby make the liquid refrigerant gasification that flow into described compressor; With the electric wire portion 36 that described electrically-heated-wire 35 is connected, this electric wire portion 36 is used for to described electrically-heated-wire 35 supply external power supplys.
Because the length of described strap 34 less than the girth of described housing 32, therefore connects connected element, to prevent to surround the described strap 34 downward landings of described housing 32 outer circumferential faces at described strap 34 two ends.At this, described connected element preferably adopts the wind spring 40 with elastic force.
Therefore, can tie down described wind spring 40 two ends and make its fixing fastening detain parts 41 in the attaching of described strap 34 two ends, the described button parts 41 of fastening are separately positioned on the inner face and the outside of described strap 34, interfere with each other to prevent described wind spring 40 and described electric wire portion 36.
And described strap 34 1 ends are provided with detection unit portion are set, and the described detection unit portion of setting is preferably formed as to can inserting the patchhole 48 that described detection unit 45 is fixed, and described patchhole 48 should be spaced apart with described electrically-heated-wire 35.
As shown in Figure 3, the button parts 41 of fastening that are arranged on described strap 34 two ends comprise and are arranged on first of described strap 34 inner faces and fasten button parts 41a and be arranged on second of described strap 34 outsides and fasten button parts 41b.Described first fastens button parts 41a and second fastens button parts 41b and is provided with fixed hole 42 (42a 42b), fixes it to be used to insert the hook 40a, the 40b that are formed on described wind spring 40 two ends.
In addition, described detection unit 45 is cylindrical, and therefore described patchhole 48 forms circle, with the size and the shape of this detection unit 45 of correspondence.Described patchhole 48 is preferably fastened between the button parts 41b at described electrically-heated-wire 35 and described second.
The electric wire portion 36 that is connected with described electrically-heated-wire 35 is connected in and is provided with described first side of fastening the part of buckleing parts 41a in described strap 34 ends.At this moment, connect the part of described electric wire portion 36 and be provided with described first and fasten the part of the buckleing parts 41a certain distance that is spaced.
As mentioned above, be arranged on described strap 34 inner faces and separate because described first fastens button parts 41a, therefore can prevent to hang over described first and fasten the phenomenon that described wind spring 40 among the fixed hole 42a that detains parts 41a and described electric wire portion 36 interfere with each other or snarl with described electric wire portion 36.
Promptly, when connecting described first, described wind spring 40 fastens button parts 41a and described second when fastening button parts 41b, be provided with described second strap 34 ends of fastening button parts 41b and fasten button parts 41b inboard owing to being positioned at described second, therefore towards described housing 32 (with reference to figure 2), fasten the button parts 41a outside and be provided with described first strap 34 ends of fastening button parts 41a owing to being positioned at described first, therefore naturally towards the outside direction of described housing 32, described electric wire portion 36 and described wind spring 40 interference or the possibilities that contact have mutually been eliminated in advance by this structure.
Fig. 4 is a control block diagram of the present invention, and as shown in Figure 4, control device 46 input ends of air conditioner connect the power supply unit 50 of described detection unit 45, power supply and operation unit 55 that can the operating air conditioner machine.
And the indoor fan drive portion 70 and being used to that the output terminal of described control device 46 connects the heater operation unit 60, the driven compressor portion 65 that is used for Driven Compressor that are used to operate described heater 33, be used to drive the indoor fan of indoor set drives the outdoor fan drive portion 75 of the outdoor fan of outdoor unit.
Thus, when the information of the refrigerant temperature of the compressor inside that described detection unit 45 monitored and relevant refrigerant property such as pressure is input to described control device 46, whether described control device 46 is in the liquid refrigerant state based on the refrigeration agent that these information checks flow into compressor inside, if be judged as the liquid refrigerant state, then make 33 work of described heater and the liquid towards refrigeration agent gasifies, thereby the prevention liquid refrigerant causes the misoperation of compressor or impaired.
The following describes the installation process of heater provided by the present invention and detection unit and the working condition of described heater and described detection unit.
As shown in Figures 2 and 3, surround the lower, outer perimeter face of described compressor 30 by described heater 33, and hook 40a, the 40b of described wind spring 40 is suspended to described first respectively fastens button parts 41a and second and fasten button parts 41b, then the tip spacing according to the described strap 34 of the elastic restoring force of described wind spring 40 diminishes, and meanwhile described heater 33 is firmly secured to described compressor 30 outer circumferential faces and not landing downwards.
Under this state, fasten and insert described detection unit 45 in the described patchhole 48 between the button parts 41b and fix to being arranged on described electrically-heated-wire 35 and described second, then finish the work that described heater 33 and described detection unit 45 are installed on described compressor 30.
Under this state, owing to fasten in the part described first that connects described electric wire portion 36 and to buckle parts 41a and be attached to described strap 34 inner faces, therefore can prevent electric wire portion 36 and hang over described first and fasten and buckle wind spring 40 that parts 41a fixes and contact or interfere, thereby prevent the phenomenon that electric wire portion 36 that this interference or contact cause is cut off or damages.
Fig. 5 represents to install the air conditioner of heater provided by the present invention and detection unit.The outdoor unit of this air conditioner comprises: compressor 30; The refrigeration agent that flow into described compressor 30 is separated into the gas-liquid separator (accumulator) 103 of liquid refrigerant and gaseous refrigerant; Adjusting is from the four-way valve 105 of the refrigerant flow direction of described compressor 30 discharges; The outdoor heat converter 107 that links to each other with described four-way valve 105; Suck the outdoor ventilating fan 109 that outside air is also discharged once more to described outdoor heat converter 107; Refrigeration agent by outdoor heat converter 107 is carried out the expansion valve 111 of puffing.
And indoor set 120 comprises indoor heat converter 122 and sucks the indoor exhaust fan 125 of air to described indoor heat converter 122.
Therefore, when air conditioner freezes, by moving compressor 30 with refrigeration agent boil down to high-temperature high-pressure state, and compressed high-temperature high-pressure refrigerant carries out condensation through outdoor heat converter 107, and the refrigeration agent that is condensed through described expansion valve 111 puffing takes place and becomes the low temperature liquid refrigeration agent.
After this, the refrigeration agent of discharging from described expansion valve 111 flow into described indoor heat converter 122, and carry out heat exchange with indoor air and evaporate, the refrigeration agent of evaporation is separated into liquid refrigerant and gaseous refrigerant in described gas-liquid separator 103, wherein gaseous refrigerant flow into compressor 30 again.
But after this air conditioner was out of service, the temperature of described compressor 30 reduced, and may have liquid refrigerant thus and flow into described compressor 30 inside.If drive described compressor 30 under the liquid refrigerant state flowing into, big resistance can take place when then driving the device of described compressor 30 inside, there is the danger of operation exception in the described compressor 30 of result.
Therefore, measure the refrigerant temperature and the pressure of described compressor 30 inside by described detection unit 45, and these refrigerant temperatures and pressure information are sent to described control device 46 (with reference to figure 4), then control device 46 judges that based on these information the residing state of refrigeration agents is that gaseous state is still liquid.
And, when judging refrigerant condition, connect power supplys to the electrically-heated-wire 35 of described heater 33 and make its heating for liquid state, make the liquid refrigerant gasification thus and be converted to gaseous refrigerant.
In sum, because the present invention inserts described detection unit and fixes in strip heater, therefore compared with prior art can reduce needed amount of parts, so can reduce manufacture cost; And, owing to can omit a part of installation process, therefore can shorten the installation needed time.
And, owing to can prevent wind spring and the contact or the interference between the electric wire portion of heater supplies power supply of fixed heater, so can prevent the generation of phenomenons such as electric wire portion and the mutual winding of wind spring, thereby have the effect that prevention electric wire portion damages.
Claims (14)
1. compressor is characterized in that comprising:
Compressor housing;
The detection unit that contacts with the outer circumferential face of described compressor housing;
Surround the heater of described compressor housing outer circumferential face, be used to make the liquid refrigerant gasification that flow into described compressor inside;
The detection unit that is arranged on the described heater is provided with portion, is used to be provided with described detection unit.
2. compressor according to claim 1 is characterized in that:
Described heater comprises the strap that surrounds described compressor housing outer circumferential face and is housed in the electrically-heated-wire of described strap inside;
Described detection unit is provided with portion and is made of the patchhole that is arranged on described strap one end, and this patchhole separates with described electrically-heated-wire, fixes to be used to inserting described detection unit.
3. compressor according to claim 2, it is characterized in that: the length of described strap is less than the girth of described compressor housing outer circumferential face, described strap two ends are provided with fastens the button parts, this is fastened the button parts and is used to tie down connected element, and this connected element is used to connect described strap two ends and makes described strap be fixed in the housing outer circumferential face.
4. compressor according to claim 3, it is characterized in that: described strap one end is provided with first and fastens the button parts, the described strap the other end is provided with second and fastens the button parts, described first fastens the button parts is arranged on described strap inner face, and described second fasten the button parts and be arranged on described strap outside to stagger mutually.
5. compressor according to claim 4, it is characterized in that: also comprise the electric wire portion that is connected with described electrically-heated-wire and extends to described strap outside, the link position of described electric wire portion is fastened and is buckled the parts branch and be arranged with being used for fixing described first of described connected element, interferes to prevent described electric wire portion and described connected element.
6. compressor according to claim 4 is characterized in that: described patchhole is arranged on described electrically-heated-wire and described second and fastens between the button parts.
7. compressor according to claim 3 is characterized in that: described connected element is made of the wind spring that hook is set at two ends.
8. compressor heater is characterized in that comprising:
With the contacted detection unit of the outer circumferential face of compressor housing;
Surround described compressor housing outer circumferential face and insert the strap of described detection unit;
Be housed in the electrically-heated-wire of described strap inside, make the refrigeration agent gasification to be used to heating described compressor housing.
9. compressor heater according to claim 8 is characterized in that: described strap is provided with and is used to insert the patchhole that described detection unit is fixed.
10. compressor heater according to claim 9, it is characterized in that: the length of described strap is less than the girth of described compressor housing outer circumferential face, described strap two ends are connected with connected element, and this connected element is used to connect described strap makes described strap be fixed on described compressor housing outer circumferential face.
11. compressor heater according to claim 10, it is characterized in that: comprise to be arranged on described strap one end and to tie down first of described connected element one end and fasten the button parts. be arranged on the described strap the other end and tie down second of the described connected element the other end and fasten the button parts, described first fastens the button parts is arranged on described strap inner face, and described second fasten the button parts and be arranged on described strap outside.
12. compressor heater according to claim 11, it is characterized in that: described strap is provided with the electric wire portion that electric current is provided to described electrically-heated-wire, described electric wire portion and described first fastens and buckles the parts branch and be arranged, and interferes mutually to prevent described electric wire portion and described connected element.
13. compressor heater according to claim 11 is characterized in that: described patchhole is arranged on described electrically-heated-wire and described second and fastens between the button parts.
14. compressor heater according to claim 10 is characterized in that: described connected element is made of the wind spring that hook is set at two ends.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060132846A KR101217120B1 (en) | 2006-12-22 | 2006-12-22 | A heater for a compressor and the compressor comprising therof |
| KR1020060132846 | 2006-12-22 | ||
| KR10-2006-0132846 | 2006-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101205895A true CN101205895A (en) | 2008-06-25 |
| CN101205895B CN101205895B (en) | 2011-04-20 |
Family
ID=39566309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100913077A Active CN101205895B (en) | 2006-12-22 | 2007-03-29 | Heater for compressor and compressor containing said heater |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2008157605A (en) |
| KR (1) | KR101217120B1 (en) |
| CN (1) | CN101205895B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564611A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Method and device for controlling electric heating belt of compressor |
| CN110985392A (en) * | 2019-11-14 | 2020-04-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner with same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019118138A1 (en) * | 2019-07-04 | 2021-01-07 | Bitzer Kühlmaschinenbau Gmbh | Compressor / expander machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930349A (en) * | 1987-05-29 | 1990-06-05 | Honda Giken Kogyo Kabushiki Kaisha & Stanley Electric Co. | Gas rate sensor |
| CN2510497Y (en) * | 2001-11-04 | 2002-09-11 | 刘锦明 | Beer brewing equipment |
-
2006
- 2006-12-22 KR KR1020060132846A patent/KR101217120B1/en active IP Right Grant
-
2007
- 2007-03-16 JP JP2007068926A patent/JP2008157605A/en active Pending
- 2007-03-29 CN CN2007100913077A patent/CN101205895B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564611A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Method and device for controlling electric heating belt of compressor |
| CN110985392A (en) * | 2019-11-14 | 2020-04-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner with same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080058759A (en) | 2008-06-26 |
| CN101205895B (en) | 2011-04-20 |
| JP2008157605A (en) | 2008-07-10 |
| KR101217120B1 (en) | 2012-12-31 |
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