CN107218642A - A kind of high-frequency electromagnetic indoor warming device - Google Patents
A kind of high-frequency electromagnetic indoor warming device Download PDFInfo
- Publication number
- CN107218642A CN107218642A CN201710439270.6A CN201710439270A CN107218642A CN 107218642 A CN107218642 A CN 107218642A CN 201710439270 A CN201710439270 A CN 201710439270A CN 107218642 A CN107218642 A CN 107218642A
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- layer
- heat
- frequency
- applicator unit
- warming device
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- 238000010792 warming Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims abstract description 17
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000005034 decoration Methods 0.000 abstract description 9
- 238000006467 substitution reaction Methods 0.000 abstract description 3
- 230000005291 magnetic effect Effects 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 206010006458 Bronchitis chronic Diseases 0.000 description 1
- 206010009866 Cold sweat Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 208000007451 chronic bronchitis Diseases 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/02—Arrangement of mountings or supports for radiators
- F24D19/0203—Types of supporting means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/04—Sources of current
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Central Heating Systems (AREA)
Abstract
The invention discloses a kind of high-frequency electromagnetic indoor warming device, including pedestal layer, insulation heat resistant layer, applicator unit, insulated heat bed course, ferromagnetic material heating layer, heat dissipating layer and shell decorative layer, laminated paste of described insulation thermal resistance is compressed on pedestal layer；Described applicator unit at least one, each applicator unit is arranged at insulation heat resistant layer another side, insulated heat bed course is covered above each applicator unit, then ferromagnetic material heating layer is installed with insulated heat bed course again, heat dissipating layer, output end of the applicator unit through conductor in parallel to high frequency generator are installed with ferromagnetic material heating layer；Described shell decorative layer is directly withheld on pedestal layer, can be used for the traditional skirting of house decoration substitution, and house indoor heating can be met again and requires, solve problem of being warmed oneself present in heating of house prior art.
Description
Technical field
The invention belongs to heating of house technical field, more particularly to a kind of high-frequency electromagnetic indoor warming device.
Background technology
With the improvement of living standards, pursuit of the people to quality of life constantly strengthens, the regional people of south China in recent years
More and more pursue need winter heating of house.But because the cost and pipeline of laying central heating appliance pipeline are passed
The problems such as defeated thermal loss, is difficult to solve always, causes southern people's winter most of at present still also to be lived in the past one
The more clammy interior of sample temperature environment.Either central heating, or the solely coal-burning boiler of family installation, oil burning boiler, combustion gas
Boiler, recovery electric heating system electric boiler are as thermal source heated, and it puts into and operating cost is all that comparison is high.
Current heating of house presses indoor paving location point, there is wall-hung type radiator（Wall is warmed up）, floor heating and emerging skirt
Line hot-water heating piece.Wall is warm to have profile unsightly, influences the whole structure of house decoration；Occupy metope, influence furniture put and
The design of decoration；Occupy the interior space, the radiator that the house in three Room two Room is installed accounts for the Interior Space of 2-3 square meters
Between；Easy sooting metope, because based on convection current, after using 2-3, the metope above radiator will be by sooting；Heating compared with
Slowly, because wall-hung type radiator is mounted in one jiao of room, and it is that based on convection current, whole room will reach preferable temperature again
The shortcomings of degree needs the long period.Floor heating, which has, will raise ground 5-10cm, influence house head room；Heating is slower, typically
Want 2-3 hour interior be possible to reach ideal temperature；Easy airborne dust, has the personnel such as asthma, chronic bronchitis to make
With；Solid wooden floor board with wooden alley can not be typically installed；Just in case there is percolating water, maintenance is inconvenient；Be not suitable for batch (-type) to supply
It is warm, the shortcomings of consuming energy higher.Emerging skirting hot-water heating piece is warm compared with wall with for floor heating, achieving many innovations, overcoming
Many shortcomings, but it is installed the shortcomings of troublesome, quantities is big, operation maintenance is difficult and still had.Therefore it is existing to be badly in need of a kind of throw
Enter relatively low with operating cost, energy-conserving and environment-protective, safe and reliable, easy for installation, operation maintenance are simple, service life is grown again
Heating mode.
The content of the invention：
The technical problem to be solved in the present invention is：A kind of high-frequency electromagnetic indoor warming device is provided, house decoration can be used for and taken
Generation traditional skirting, can meet house indoor heating and require, solve above-mentioned southern area heating of house and exist in the prior art again
Various problems.The product put into and operating cost it is relatively low, beneficial to popularization and application, firing rate is fast, the thermal efficiency is high, heat without combustion
Burning process and without any pollutant emission, energy-conserving and environment-protective, safe and reliable, is installed and operation maintenance is simple, service life is long.
The technical scheme that the present invention takes is：A kind of high-frequency electromagnetic indoor warming device, including pedestal layer, insulation thermal resistance
Layer, applicator unit, insulated heat bed course, ferromagnetic material heating layer, heat dissipating layer and shell decorative layer, described insulation thermal resistance
Laminated paste is compressed on pedestal layer；Described applicator unit at least one, each applicator unit is respectively provided with
Insulated heat bed course is covered on insulation heat resistant layer another side, each applicator unit, then again in insulated heat bed course
On be installed with ferromagnetic material heating layer, ferromagnetic material heating layer and be installed with heat dissipating layer, applicator unit is through conductor in parallel tremendously high frequency
The output end of generator；Described shell decorative layer is directly withheld on pedestal layer.
Described pedestal layer is aluminum alloy material, and pedestal layer is connected using threaded connection or neck mounting means with indoor wall
Connect.
Described insulation heat resistant layer is insulating cement plank.
The exchange that described applicator unit includes 220V/50Hz turns DC rectifier, 20-40kHz of direct current conversion
The high-frequency converter of frequency alternating current and at least one magnet coil, described 220V/50Hz exchange turn DC rectifier
The high-frequency ac switch input that output end changes 20-40kHz frequencies with direct current is connected, and direct current changes 20-40kHz
The high-frequency ac converter output end of frequency is connected with magnet coil input, and magnet coil is high temperature resistant magnet wire circle.
Described insulated heat bed course is heat-resisting cotton material.
Described heat dissipating layer and shell decorative layer is aluminum alloy material.
Two end faces of described pedestal layer are provided with the connector of magnet coil.
Using a kind of high-frequency electromagnetic indoor warming device of above-mentioned technical proposal, house decoration substitution tradition can be used for and kicked
Payment to a porter, can meet house indoor heating and require, solve various present in the regional heating of house prior art of south China ask again
Topic.
Beneficial effects of the present invention：Compared with prior art, effect of the invention is as follows：
（1）The present invention produces big density by ferromagnetic material under the action of alternating magnetic field of high speed change and is vortexed, and causes ferromagnetic material
Expect itself heating at a high speed, rapid release heat provides thermal source for heating of house, heat conversion is high, programming rate is fast, puts into and transports
Row expense is low；
（2）The present invention directly transmits heat after ferromagnetic material self-heating provides thermal source through aluminum thermal fin and shell decorative layer
Amount is distributed in room air, without other defeated thermal mediums, and is installed so that applicator is unit-modularized, is installed and operation maintenance letter
Risk that is single, being revealed without defeated thermal medium, it is safe and reliable；
（2）The present invention realizes the function of house indoor heating, is not take up the interior space, not shadow while as skirting
Indoor decoration effect is rung to put with attractive in appearance, without prejudice to furniture.
Brief description of the drawings：
Fig. 1 is this dimensional structure diagram of the invention；
Fig. 2 is this schematic cross-section of the invention；
Fig. 3 is electric part component connection figure of the invention；
In figure：1st, pedestal layer, 2, insulation heat resistant layer, 3, applicator unit, 4, insulated heat bed course, 5, ferromagnetic material heating
Layer, 6, heat dissipating layer, 7, shell decorative layer；31st, external power supply, 32,220V/50Hz exchange turn DC rectifier, 33, direct current
Change the high-frequency ac converter of 20-40kHz frequencies, 34, magnet coil.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The technical scheme that the present invention takes is：A kind of high-frequency electromagnetic indoor warming device, including pedestal layer 1, insulation thermal resistance
Layer 2, applicator unit 3, insulated heat bed course 4, ferromagnetic material heating layer 5, heat dissipating layer 6 and shell decorative layer 7, insulate thermal resistance
2 one side of layer, which are pasted, to be compressed on pedestal layer 1；Applicator unit 3 at least one, each applicator unit 3 is arranged at
Insulate the another side of heat resistant layer 2, and each applicator unit 3 covers insulated heat bed course 4 above, then again in insulated heat bed course
Be installed with 4 on ferromagnetic material heating layer 5, ferromagnetic material heating layer 5 and be installed with heat dissipating layer 6, applicator unit 3 through conductor in parallel extremely
The output end of radio-frequency generator；Described shell decorative layer 7 is directly withheld on pedestal layer.
Further pedestal layer 1 is aluminum alloy material, and aluminum alloy material is exhausted magnetic material, and easy-formation, pedestal layer 1 uses spiral shell
Line is connected or neck mounting means is connected with indoor wall, and the installation connection of pedestal layer 1, side can also be realized using guide rail mode
Formula is various.
Further insulation heat resistant layer 2 is insulating cement plank, is good insulating using insulating cement plank one, two be thermal insulation
Can be good, it is to avoid heat conducts to inside wall.
The exchange that further applicator unit 3 includes 220V/50Hz turn DC rectifier 32, direct current conversion 20-
The high-frequency ac converter 33 of 40kHz frequencies and at least one magnet coil 24, described 220V/50Hz exchange turn electricity
The input of high-frequency converter 33 that the output end of flow rectifier 32 changes 20-40kHz frequencies with direct current is connected, 220V/50Hz's
Exchange turns the input of DC rectifier 32 and is connected with external power supply 31, and direct current changes the high-frequency converter of 20-40kHz frequencies
33 output ends are connected with the input of magnet coil 34, and magnet coil 34 is high temperature resistant magnet wire circle, by conversion, realizes the present apparatus
The applicator power supply needed.
Further insulated heat bed course 4 is heat-resisting cotton material, and one is good insulating, and two be that heat-proof quality is good, it is to avoid heat
Measure and conducted to the inside of wall.
Further heat dissipating layer 6 and shell decorative layer 7 are aluminum alloy material, and aluminum alloy material heat transfer is fast.
Two end faces of further pedestal layer 1 are provided with the connector of magnet coil, it is possible to achieve modular company
Connect, the module of different size and length can be processed into according to different construction sites, it is real by interface between module and module
Now connect, facilitate each in-site installation.
Embodiment：As Figure 1-3, a kind of high-frequency electromagnetic indoor warming device, by magnet coil 3, insulated heat bed course
4th, ferromagnetic material heating layer 5 constitutes applicator unit, strengthens radiating effect through aluminum heat dissipating layer 6, fixes successively from inside to outside
In the magnetic field confined space being made up of pedestal layer 1 and shell decorative layer 7.
It is preferred that, a kind of above-mentioned high-frequency electromagnetic indoor warming device can be used for the traditional skirting of house decoration substitution, again
House indoor heating can be met to require, solve various problems present in the regional heating of house prior art of south China.
It is preferred that, described pedestal layer is made up of resistance magnetic material, is directly anchored on wall, plays basic fixation, supporting part
Part and magnetic screening action.
It is preferred that, described insulation heat resistant layer is constituted by pasting the asbestos board being compressed on pedestal layer, plays protection electromagnetic wire
Enclose and prevent heat from transmitting the effect being lost in wall.
It is preferred that, described applicator unit has several, and by room, careat is determined, each applicator unit
Electromagnetic layer, insulated thermal insulating layer are constituted by magnet coil and constitutes thermal insulation layer, ferromagnetic material heating layer composition electromagnetic heating layer, each
Applicator unit strengthens radiating effect through aluminum heat dissipating layer, i.e., in order and calculate each magnet coil close along skirting
Degree is arranged and is fixed on insulation heat resistant layer, insulated heat bed course is covered above magnet coil, then again in insulated heat bed course
On be installed with ferromagnetic material heating layer, ferromagnetic material and be installed with aluminum heat dissipating layer, the magnet coil of each applicator unit is through wire
It is connected in parallel to the output end of radio-frequency generator.
It is preferred that, described shell decorative layer is also made up of resistance magnetic and the good material of heat conduction, is directly withheld in pedestal layer
On, magnetic screen confined space is constituted with pedestal layer, while being used as decoration baseboard.
The course of work of the present invention：220V/50Hz alternating current is rectified into DC current by radio-frequency generator 8, then will
Direct current is converted into 20-40kHz of frequency high-frequency alternating current, and the high frequency electric of change, which flows through magnet coil 3, at a high speed can produce height
The magnetic line of force in the uniform unstable magnetic field of speed change, magnetic field passes through ferromagnetic material heating layer 4, ferromagnetic material cutting alternate magnetic force line
Produce the big density vortex of alternation, vortex makes the iron atom high speed random motion of ferromagnetic material, atom mutually collide, rub and
Generate heat at a high speed, rapid release heat provides thermal source for heating of house, is then directly transmitted through aluminum thermal fin and shell decorative layer
Heat is distributed in room air, so as to reach raising indoor temperature.
It is preferred that, big density is produced under the action of alternating magnetic field of high speed change by ferromagnetic material and is vortexed, is caused ferromagnetic
Material itself generates heat at a high speed, and rapid release heat is that heating of house provides thermal source, heat conversion is high, programming rate soon, put into and
Operating cost is low.
It is preferred that, the present invention is directly decorated after ferromagnetic material self-heating provides thermal source through aluminum thermal fin and shell
Layer transmission heat is distributed in room air, without other defeated thermal mediums, and is installed so that applicator is unit-modularized, is installed and operation
Simple, to be revealed without defeated thermal medium risk is safeguarded, it is safe and reliable.
It is preferred that, the present invention realizes the function of house indoor heating, is not take up Interior Space while as skirting
Between, do not influence indoor decoration effect and attractive in appearance, without prejudice to furniture to put.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of high-frequency electromagnetic indoor warming device, including pedestal layer（1）, insulation heat resistant layer（2）, applicator unit（3）, absolutely
Edge insulating pad layer（4）, ferromagnetic material heating layer（5）, heat dissipating layer（6）With shell decorative layer（7）, it is characterised in that：Described is exhausted
Edge heat resistant layer（2）Simultaneously paste and be compressed on pedestal layer（1）On；Described applicator unit（3）At least one, each high frequency
Heat-generating units（3）It is arranged at insulation heat resistant layer（2）Another side, each applicator unit（3）Insulated heat pad is covered above
Layer（4）, then again in insulated heat bed course（4）On be installed with ferromagnetic material heating layer（5）, ferromagnetic material heating layer（5）On be installed with
Heat dissipating layer（6）, applicator unit（3）Output end through conductor in parallel to high frequency generator；Described shell decorative layer（7）Directly
Connect and withhold on pedestal layer.
2. a kind of high-frequency electromagnetic indoor warming device according to claim 1, it is characterised in that：Described pedestal layer（1）
For aluminum alloy material, pedestal layer（1）It is connected using threaded connection or neck mounting means with indoor wall.
3. a kind of high-frequency electromagnetic indoor warming device according to claim 1, it is characterised in that：Described insulation heat resistant layer
（2）For insulating cement plank.
4. a kind of high-frequency electromagnetic indoor warming device according to claim 1, it is characterised in that：Described applicator list
Member（3）Exchange including 220V/50Hz turn DC rectifier, direct current conversion 20-40kHz frequency ACs high-frequency converter,
And at least one magnet coil, described 220V/50Hz exchange turn DC rectifier output end and direct current conversion 20-
The high-frequency converter input connection of 40kHz frequencies, direct current changes the high-frequency ac converter output end of 20-40kHz frequencies
It is connected with magnet coil input, magnet coil is high temperature resistant magnet wire circle.
5. a kind of high-frequency electromagnetic indoor warming device according to claim 1, it is characterised in that：Described insulated heat pad
Layer（4）For heat-resisting cotton material.
6. a kind of high-frequency electromagnetic indoor warming device according to claim 1, it is characterised in that：Described heat dissipating layer（6）
With shell decorative layer（7）It is aluminum alloy material.
7. a kind of high-frequency electromagnetic indoor warming device according to claim 1 and 2, it is characterised in that：Described pedestal layer
（1）Two end faces be provided with the connector of magnet coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439270.6A CN107218642A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency electromagnetic indoor warming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439270.6A CN107218642A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency electromagnetic indoor warming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107218642A true CN107218642A (en) | 2017-09-29 |
Family
ID=59948541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439270.6A Pending CN107218642A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency electromagnetic indoor warming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107218642A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611012A (en) * | 2020-12-24 | 2021-04-06 | 李红霞 | Frequency resonance type heat supply device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425880A (en) * | 2003-01-27 | 2003-06-25 | 天津市泰来节能环保技术有限公司 | Magnetic induction high efficiency radiator |
| CN101832013A (en) * | 2010-02-12 | 2010-09-15 | 王振水 | Electric heating skirting |
| CN201892260U (en) * | 2010-11-25 | 2011-07-06 | 深圳拓邦股份有限公司 | Electromagnetic heating heater |
| CN202990376U (en) * | 2012-12-25 | 2013-06-12 | 林忠 | Electric heating skirting line decorating plate |
-
2017
- 2017-06-12 CN CN201710439270.6A patent/CN107218642A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425880A (en) * | 2003-01-27 | 2003-06-25 | 天津市泰来节能环保技术有限公司 | Magnetic induction high efficiency radiator |
| CN101832013A (en) * | 2010-02-12 | 2010-09-15 | 王振水 | Electric heating skirting |
| CN201892260U (en) * | 2010-11-25 | 2011-07-06 | 深圳拓邦股份有限公司 | Electromagnetic heating heater |
| CN202990376U (en) * | 2012-12-25 | 2013-06-12 | 林忠 | Electric heating skirting line decorating plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611012A (en) * | 2020-12-24 | 2021-04-06 | 李红霞 | Frequency resonance type heat supply device and method |
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Application publication date: 20170929 |