CN204646663U - Multiscrew compressor - Google Patents
Multiscrew compressor Download PDFInfo
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- CN204646663U CN204646663U CN201520255606.XU CN201520255606U CN204646663U CN 204646663 U CN204646663 U CN 204646663U CN 201520255606 U CN201520255606 U CN 201520255606U CN 204646663 U CN204646663 U CN 204646663U
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Abstract
The utility model provides the multiscrew taking up room little during a kind of air displacement Datong District compressor, comprise housing, motor, coupling and 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor and a female rotor, in every a pair negative and positive rotor, male rotor engages with female rotor, male rotor in each group negative and positive rotor is cascaded by coupling, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, described housing is provided with suction port and relief opening, described gas-entered passageway communicates with suction port, described exhaust passage communicates with relief opening, the output terminal of described motor is connected with the male rotor often organized in negative and positive rotor and drives male rotor to rotate.The beneficial effects of the utility model are: the air displacement increasing equal volume compressor, improve the operational efficiency of compressor.
Description
Technical field
The utility model relates to operation of air conditioning systems field, specifically multiscrew compressor.
Background technique
Helical-lobe compressor utilizes screw shaped rotor compress do rotation motion in cylinder and carry the rotary compressor of gas.Helical-lobe compressor is widely used in the departments such as mine, chemical industry, power, metallurgy, building, machinery and refrigeration.Air displacement is 25 ~ 38000m
3/ h.At atmosheric pressure during air-breathing, the exhaust pressure of single-stage can reach 0.5 MPa; The exhaust pressure of two-stage and three grades reaches more than 1.2 MPas and 3 MPas respectively.Single screw compressor is all fluid injection cooling.Maximum with the compressor of twin shaft (twin-screw) in industrial production, but the compressor of single shaft (singe screw) also obtains application gradually.The compression of screw air compressor air is the volume-variation of the teeth groove of the negative and positive rotor by being installed on engagement parallel to each other in casing and reaches.The secondary rotation in the casing of its precision-fit of rotor makes the gas between rotor teeth groove constantly produce periodic volume-variation and along rotor axis, push discharge side to by suction side, completes suction, compression, exhaust three working procedure.
Current helical-lobe compressor only has unit single-stage, single machine two-stage two kinds of patterns, corresponding helical-lobe compressor screw diameter, and the technology such as operation line speed limit, and compressor displacement cannot be accomplished very large, and large air displacement helical-lobe compressor volume is large.If desired provide large refrigerating capacity to need the running of design multiple stage unit, system bulk is huger.
Centrifugal compressor flow is large, reaches existing market demand, but there is compressor and unit volume is large, and installation space requires large defect;
Little as idle call environmental protection refrigerant R134a volume refrigerating capacity, when equal refrigerating capacity, need larger air displacement, equipment needed thereby volume is large.
Now along with social development, the demand for air-conditioning system is increasing, and the refrigeration compressor set volume of air-conditioning system is more and more huger, and the value of city space constantly increases, and occurs that air-conditioning system installing space is little, the contradiction that refrigeration requirement is large.
Model utility content
Technical problem to be solved in the utility model is: provide the multiscrew taking up room little during a kind of air displacement Datong District compressor.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: multiscrew compressor, comprise housing, motor, coupling and 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor and a female rotor, in every a pair negative and positive rotor, male rotor engages with female rotor, male rotor in each group negative and positive rotor is cascaded by coupling, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway of this group and exhaust passage respectively simultaneously, described housing is provided with suction port and relief opening, described gas-entered passageway communicates with suction port, described exhaust passage communicates with relief opening, the output terminal of described motor is connected with the male rotor often organized in negative and positive rotor and drives male rotor to rotate.
Further, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors.
Further, described motor, coupling harmonizing yinyang rotor are all arranged in housing.
Further, described coupling harmonizing yinyang rotor is all arranged in housing, and described motor is arranged on outside housing.
Further, described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are separately positioned on the two ends of motor.
Further, described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are disposed side by side on the side of motor.
Further, described negative and positive rotor is provided with one group, and described negative and positive rotor is arranged on the side of motor.
Further, described motor is connected with male rotor by coupling or gear drive.
Further, the output terminal of described motor is corresponding with suction port is arranged.
Further, described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor by frequency variator.
The beneficial effects of the utility model are: compressor comprises 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, gas-entered passageway communicates with suction port, exhaust passage communicates with relief opening, increase the air displacement of equal volume compressor, improve the operational efficiency of compressor.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment 1 multiscrew compressor transverse sectional view.
Fig. 2 is the utility model embodiment 1 multiscrew compressor longitudinal sectional view.
Fig. 3 is the utility model embodiment 2 multiscrew compressor transverse sectional view.
Fig. 4 is the utility model embodiment 2 multiscrew compressor longitudinal sectional view.
Fig. 5 is the utility model embodiment 3 multiscrew compressor transverse sectional view.
Fig. 6 is the utility model embodiment 3 multiscrew compressor longitudinal sectional view.
Fig. 7 is the utility model embodiment 4 multiscrew compressor transverse sectional view.
Label declaration:
1, housing; 2, motor; 3, coupling; 4, male rotor; 5, female rotor; 6, suction port; 7, relief opening; 8, gas-entered passageway; 9, exhaust passage; 10, gear drive.
Embodiment
By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with mode of execution.
The design of the utility model most critical is: compressor comprises 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, gas-entered passageway communicates with suction port, exhaust passage communicates with relief opening, increase the air displacement of equal volume compressor, improve the operational efficiency of compressor.
Please refer to Fig. 1 to Fig. 7, multiscrew compressor, comprise housing 1, motor 2, coupling 3 and 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor 4 and a female rotor 5, in every a pair negative and positive rotor, male rotor 4 engages with female rotor 5, male rotor 4 in each group negative and positive rotor is cascaded by coupling 3, each group negative and positive rotor is equipped with gas-entered passageway 8 and exhaust passage 9, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, described housing 1 is provided with suction port 6 and relief opening 7, described gas-entered passageway 8 communicates with suction port 6, described exhaust passage 9 communicates with relief opening 7, the output terminal of described motor 2 is connected with the male rotor 4 often organized in negative and positive rotor and drives male rotor 4 to rotate.
Traditional unit Singe stage screw compressor only has a pair screw compression refrigeration agent, only has two cavitys (air aspiration cavity, exhaust cavity); When needs obtain larger air displacement, need the diameter (namely increasing cavity space) strengthening screw rod; But after screw diameter increases, gas increases in screw rod tangent direction speed, affects compression efficiency.
The utility model multiscrew compressor adopts multipair screw rod (negative and positive rotor), form multiple compression chamber, common compression work, when equal screw diameter, due to multipair screw rod co-operation, the air displacement produced is many times singly to helical-lobe compressor, meets small screw diameter and reaches the effect that large screw diameter plays generation air displacement, specific as follows:
1, the volume of compressor is reduced: reduced by conventional screw diameter, (such as common at present helical-lobe compressor diameter 200mm rises, present employing the utility model multiscrew Compressor Technology scheme, can adopt the diameter of 50mm to reach the air displacement of 200mm).The diameter of unit screw rod is greater than 540mm, due to linear velocity problem (helical-lobe compressor has best linear velocity to limit), compressor efficiency reduces, and adopts the multiscrew compressor of equal air displacement, 4 pairs of screw rods of corresponding diameter 250mm substitute, and can reduce unit volume:
2, operating range is increased: multiscrew compressor has the common compression exhaust of multiple cavity simultaneously, when equal screw diameter, increases the air displacement of many times, such as: the air displacement adopting 340mm tetra-pairs of screw rods to reach will reach the air displacement of 2 540mm screw rods.
3, because compressor adopts multiscrew structure, reduce screw diameter, and compressor corresponding housing 1 reduces to reduce difficulty of processing, enhances productivity.
4, multiscrew compressor is owing to reducing screw diameter, corresponding linear velocity is reduced, can adopt gear up technology to Screw chiller, improves compressor operation speed, makes the compressor of equal screw diameter, and air displacement strengthens, and promotes the operational efficiency of compressor.
And traditional single machine compression with double stage machine is cascaded by coupling 3 by two pairs of screw rods that diameter is different, the suction port 6 of the relief opening 7 UNICOM second level of the first order, that two pairs of screw rods carry out secondary compression to same gas, the compression ratio of gas is strengthened, improve refrigeration, but the air displacement of compressor can not be increased.The utility model multiscrew compressor is that same gas is divided into many groups by gas-entered passageway 8, is compressed respectively by multiple screw rod, and discharge compressor that the relief opening 7 of gas is connected together, play the object increasing compressor air-discharging amount.
From foregoing description, the beneficial effects of the utility model are: the air displacement increasing equal volume compressor, improve the operational efficiency of compressor.
Further, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors.
Seen from the above description, increase screw rod quantity, the mode by reducing screw diameter increases compressor air-discharging amount and reduces compressor simultaneously and take up room.
Further, described motor 2, coupling 3 harmonizing yinyang rotor are all arranged in housing 1.
Seen from the above description, because motor 2 and screw rod (negative and positive rotor) are all arranged in housing 1, not only run noise little, the refrigerator oil in motor 2 and unit and refrigerant can be avoided simultaneously to produce leakage problem.
Further, described coupling 3 harmonizing yinyang rotor is all arranged in housing 1, and described motor 2 is arranged on outside housing 1.
Seen from the above description, this structure is adopted convenient for maintaining personnel to keep in repair.
Further, described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are separately positioned on the two ends of motor 2.
Further, described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are disposed side by side on the side of motor 2.
Further, described negative and positive rotor is provided with one group, and described negative and positive rotor is arranged on the side of motor 2.
Further, described motor 2 is connected with male rotor 4 by coupling 3 or gear drive 10.
Further, the output terminal of described motor 2 is corresponding with suction port 6 is arranged.
Further, described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor 2 by frequency variator.
Seen from the above description, the speed Control to negative and positive rotor is realized by frequency variator.
Please refer to Fig. 1 and Fig. 2, embodiment 1 of the present utility model is:
A kind of multiscrew compressor, comprise housing 1, motor 2, coupling 3 and 2 groups of negative and positive rotors, described motor 2, coupling 3 harmonizing yinyang rotor is all arranged in housing 1, two groups of negative and positive rotors are separately positioned on the two ends of motor 2, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor 4 and a female rotor 5, in every a pair negative and positive rotor, male rotor 4 engages with female rotor 5, male rotor 4 in each group negative and positive rotor is cascaded by coupling 3, each group negative and positive rotor is equipped with gas-entered passageway 8 and exhaust passage 9, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, described housing 1 is provided with suction port 6 and relief opening 7, described gas-entered passageway 8 communicates with suction port 6, described exhaust passage 9 communicates with relief opening 7, the output terminal of described motor 2 is connected with the male rotor 4 often organized in negative and positive rotor and drives male rotor 4 to rotate.Described motor 2 is connected with male rotor 4 by coupling 3.The output terminal of described motor 2 is corresponding with suction port 6 to be arranged.Described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor 2 by frequency variator.
Please refer to Fig. 3 and Fig. 4, embodiment 2 of the present utility model is:
A kind of multiscrew compressor, comprise housing 1, motor 2, coupling 3 and 1 group of negative and positive rotor, described motor 2, coupling 3 harmonizing yinyang rotor is all arranged in housing 1, described negative and positive rotor is arranged on the side of motor 2, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor 4 and a female rotor 5, in every a pair negative and positive rotor, male rotor 4 engages with female rotor 5, male rotor 4 in each group negative and positive rotor is cascaded by coupling 3, each group negative and positive rotor is equipped with gas-entered passageway 8 and exhaust passage 9, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, described housing 1 is provided with suction port 6 and relief opening 7, described gas-entered passageway 8 communicates with suction port 6, described exhaust passage 9 communicates with relief opening 7, the output terminal of described motor 2 is connected with the male rotor 4 often organized in negative and positive rotor and drives male rotor 4 to rotate.Described motor 2 is connected with male rotor 4 by gear drive 10.The output terminal of described motor 2 is corresponding with suction port 6 to be arranged.Described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor 2 by frequency variator.
Please refer to Fig. 5 and Fig. 6, embodiment 3 of the present utility model is:
A kind of multiscrew compressor, comprise housing 1, motor 2, coupling 3 and 2 groups of negative and positive rotors, described coupling 3 harmonizing yinyang rotor is all arranged in housing 1, described motor 2 is arranged on outside housing 1, two groups of negative and positive rotors are separately positioned on the two ends of motor 2, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor 4 and a female rotor 5, in every a pair negative and positive rotor, male rotor 4 engages with female rotor 5, male rotor 4 in each group negative and positive rotor is cascaded by coupling 3, each group negative and positive rotor is equipped with gas-entered passageway 8 and exhaust passage 9, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, described housing 1 is provided with suction port 6 and relief opening 7, described gas-entered passageway 8 communicates with suction port 6, described exhaust passage 9 communicates with relief opening 7, the output terminal of described motor 2 is connected with the male rotor 4 often organized in negative and positive rotor and drives male rotor 4 to rotate.Described motor 2 is connected with male rotor 4 by coupling 3.The output terminal of described motor 2 is corresponding with suction port 6 to be arranged.Described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor 2 by frequency variator.
Please refer to Fig. 7, embodiment 4 of the present utility model is:
A kind of multiscrew compressor, comprise housing 1, motor 2, coupling 3 and 2 groups of negative and positive rotors, described motor 2, coupling 3 harmonizing yinyang rotor is all arranged in housing 1, two groups of negative and positive rotors are disposed side by side on the side of motor 2, often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor 4 and a female rotor, in every a pair negative and positive rotor, male rotor 4 engages with female rotor (not shown), male rotor 4 in each group negative and positive rotor is cascaded by coupling 3, each group negative and positive rotor is equipped with gas-entered passageway 8 and exhaust passage 9, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing 1, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway 8 of this group and exhaust passage 9 respectively simultaneously, described housing 1 is provided with suction port 6 and relief opening 7, described gas-entered passageway 8 communicates with suction port 6, described exhaust passage 9 communicates with relief opening 7, the output terminal of described motor 2 is connected with the male rotor 4 often organized in negative and positive rotor and drives male rotor 4 to rotate.Described motor 2 is connected with male rotor 4 by gear drive 10.The output terminal of described motor 2 is corresponding with suction port 6 to be arranged.Described multiscrew compressor also comprises temperature transducer, pressure transducer, controller and frequency variator, and described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor 2 by frequency variator.
In sum, the multiscrew compressor beneficial effect that the utility model provides is: compressor comprises 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, gas-entered passageway communicates with suction port, exhaust passage communicates with relief opening, increases the air displacement of equal volume compressor, improves the operational efficiency of compressor.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. multiscrew compressor, it is characterized in that: comprise housing, motor, coupling and 1 ~ 2 group of negative and positive rotor, often organize negative and positive rotor and comprise 2 ~ 4 pairs of negative and positive rotors, every a pair negative and positive rotor comprises a male rotor and a female rotor, in every a pair negative and positive rotor, male rotor engages with female rotor, male rotor in each group negative and positive rotor is cascaded by coupling, each group negative and positive rotor is equipped with gas-entered passageway and exhaust passage, the chamber for holding every a pair negative and positive rotor is respectively provided with in described housing, described chamber is independent separately, each chamber at each group negative and positive rotor place communicates with the gas-entered passageway of this group and exhaust passage respectively simultaneously, described housing is provided with suction port and relief opening, described gas-entered passageway communicates with suction port, described exhaust passage communicates with relief opening, the output terminal of described motor is connected with the male rotor often organized in negative and positive rotor and drives male rotor to rotate.
2. multiscrew compressor according to claim 1, is characterized in that: often organize negative and positive rotor and comprise 4 pairs of negative and positive rotors.
3. multiscrew compressor according to claim 1, is characterized in that: described motor, coupling harmonizing yinyang rotor are all arranged in housing.
4. multiscrew compressor according to claim 1, is characterized in that: described coupling harmonizing yinyang rotor is all arranged in housing, and described motor is arranged on outside housing.
5. multiscrew compressor according to claim 1, is characterized in that: described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are separately positioned on the two ends of motor.
6. multiscrew compressor according to claim 1, is characterized in that: described negative and positive rotor is provided with two groups, and two groups of negative and positive rotors are disposed side by side on the side of motor.
7. multiscrew compressor according to claim 1, is characterized in that: described negative and positive rotor is provided with one group, and described negative and positive rotor is arranged on the side of motor.
8. multiscrew compressor according to claim 1, is characterized in that: described motor is connected with male rotor by coupling or gear drive.
9. multiscrew compressor according to claim 1, is characterized in that: the output terminal of described motor is corresponding with suction port to be arranged.
10. multiscrew compressor according to claim 1, it is characterized in that: also comprise temperature transducer, pressure transducer, controller and frequency variator, described temperature transducer and pressure transducer are electrically connected with controller respectively, and described controller is electrically connected with motor by frequency variator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520255606.XU CN204646663U (en) | 2015-04-24 | 2015-04-24 | Multiscrew compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520255606.XU CN204646663U (en) | 2015-04-24 | 2015-04-24 | Multiscrew compressor |
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| Publication Number | Publication Date |
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| CN204646663U true CN204646663U (en) | 2015-09-16 |
Family
ID=54099424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520255606.XU Withdrawn - After Issue CN204646663U (en) | 2015-04-24 | 2015-04-24 | Multiscrew compressor |
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| CN (1) | CN204646663U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776025A (en) * | 2015-04-24 | 2015-07-15 | 福建雪人股份有限公司 | Multi-screw compressor |
| CN106050657A (en) * | 2016-08-01 | 2016-10-26 | 珠海格力电器股份有限公司 | Screw compressor and multistage screw drive structure thereof |
| CN107859620A (en) * | 2017-10-31 | 2018-03-30 | 北京精密机电控制设备研究所 | A kind of high-pressure low-noise servomotor pump based on double shaft servomotors |
| CN114909277A (en) * | 2022-04-26 | 2022-08-16 | 天津大学 | Compressor capable of providing negative pressure function |
-
2015
- 2015-04-24 CN CN201520255606.XU patent/CN204646663U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776025A (en) * | 2015-04-24 | 2015-07-15 | 福建雪人股份有限公司 | Multi-screw compressor |
| CN104776025B (en) * | 2015-04-24 | 2019-02-01 | 福建雪人股份有限公司 | Multiscrew compressor |
| CN106050657A (en) * | 2016-08-01 | 2016-10-26 | 珠海格力电器股份有限公司 | Screw compressor and multistage screw drive structure thereof |
| CN107859620A (en) * | 2017-10-31 | 2018-03-30 | 北京精密机电控制设备研究所 | A kind of high-pressure low-noise servomotor pump based on double shaft servomotors |
| CN114909277A (en) * | 2022-04-26 | 2022-08-16 | 天津大学 | Compressor capable of providing negative pressure function |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20190201 |