CN208282428U - Solar water heater support - Google Patents
Solar water heater support Download PDFInfo
- Publication number
- CN208282428U CN208282428U CN201820829855.9U CN201820829855U CN208282428U CN 208282428 U CN208282428 U CN 208282428U CN 201820829855 U CN201820829855 U CN 201820829855U CN 208282428 U CN208282428 U CN 208282428U
- Authority
- CN
- China
- Prior art keywords
- rack
- water heater
- bottom plate
- solar water
- water tank
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000001680 brushing effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010033307 Overweight Diseases 0.000 description 1
- 241000112598 Pseudoblennius percoides Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000020825 overweight Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a solar water heater support belongs to solar water heater technical field, including two support bodies, two support body upper ends are articulated to have a bottom plate, the spout has been seted up to the bottom plate bottom, be connected with the crossbeam between two support bodies, the crossbeam middle part is provided with rectangle annular structure, the last angle adjustment mechanism of installing of rectangle annular structure, angle adjustment mechanism is used for adjusting the angle of heat collector, surface mounting has the brush to sweep the mechanism on the bottom plate, the brush is swept the mechanism and is used for cleaning the dust of heat collector surface accumulation. The utility model discloses can make solar water heater's heat collector change along with the change of sunshine irradiation direction to can clear up the dust on heat collector surface automatically, improve the utilization ratio of solar energy.
Description
Technical field
The utility model belongs to technical field of solar water heaters, and in particular to a kind of rack of solar water heater.
Background technique
With the development of the society, the increasingly raising of people's living standard, domestic hot-water has become can not in people's life
Or scarce a part.Solar water heater is the heating device for converting solar energy to thermal energy, by water from low-temperature heat to height
Temperature is used with meeting hot water of the people in life, production.Solar water heater is divided into electron tubes type solar energy by structure type
Water heater and flat solar water heater occupy the market part of the country 95% mainly based on vacuum pipe solar water heater
Volume.
Plate type solar water heater is easy for installation, simple, occupied area is small, is not limited by installation environment, it is mountable
Balcony, window, roof, on wall etc.;And heating rate height is adopted, and it is very energy saving, using with the spies such as simple, fast, convenient and safe
Property, the deep favor by users.Flat plate solar water heater is the exploitation of small high-rise house Aided design.Water tank is placed on sun
The places such as platform, roof, wall.Flat-plate solar collector is placed on balcony inside building column, window, roof, on wall, makes up
Traditional solar water heater due to inadequate natural endowment cannot achieve and build and environment perfect combination it is sorry.Heat collector and water
Case is disconnected from each other, and heat collector can be flexibly mounted on roof, skylight, balcony or wall, not limited by position, has reached and high level
The perfect combination of building and environmental integration.
But the heat collector of existing plate type solar water heater is during installation, angle is just fixed, in use process
In be not able to rotate, cause received solar irradiation to be not enough, be in addition exactly heat collector surface be easy to accumulation dust, also influence
Absorption to solar energy.
Utility model content
The utility model aim is: being intended to provide a kind of rack of solar water heater, can make the collection of solar water heater
Hot device changes with the change of sunniness direction, and can the dust automatically to heat collector surface clear up, improve
The utilization rate of solar energy.
To realize the above-mentioned technical purpose, the technical solution adopted in the utility model is as follows:
A kind of rack of solar water heater, including two rack bodies are connected with crossbeam between described two rack bodies,
It is provided with rectangular ring structure in the middle part of the crossbeam, angle adjusting mechanism, the angle are installed in the rectangular ring structure
Regulating mechanism is used to adjust the angle of heat collector, so that heat collector be made to remain perpendicular to the direction of direct sunlight, the angle tune
Saving mechanism includes rectangular slab, and the rectangular slab bottom is connected with the first spring, and first lower spring end is connected to rectangular ring
In structure, the rectangular slab upper surface is connected with mandril, and the rectangular slab lower surface middle part is connected with the first water storage by steel wire
Case, the steel wire pass through the centre bore of rectangular ring structure, are provided with water inlet, first water storage on first water tank
Bottom portion is connected with outlet pipe;Described two rack body upper ends are hinged with bottom plate, and the bottom base plate offers sliding slot, described
Plate upper surface is equipped with brushing mechanism, and the brushing mechanism is used to clean the tired dust of heat-collector superficial, and the brush sweeps machine
Structure includes two sliding rails, and described two sliding rails are connected to the upper surface of bottom plate and are symmetrical arranged, slide between described two sliding rails
It is connected with cross bar, is provided with bristle on the cross bar, the bottom plate right end is connected with baffle, and the cross bar and baffle are connected with the
Two springs, the cross bar middle part are connected with link, drawstring are connected on the link, and the bottom plate left end is connected with fixed pulley,
The drawstring is around fixed pulley and lower end is connected with the second water tank, and second water tank lower end is provided with water outlet.
It further limits, the mandril upper end is connected with idler wheel, and the idler wheel rolling is connected in sliding slot.Such structure
Design can reduce the frictional force between mandril and sliding slot, reduce abrasion, prolong the service life.
It further limits, the mandril upper end rolls and is connected with spin, and the rolling ball rolls are connected in sliding slot.It is such
Structure design, can reduce the frictional force between mandril and sliding slot, reduce abrasion, prolong the service life.
It further limits, is provided with regulating valve on the outlet pipe.Such structure design, can be according to positive throughout the year
The time of light irradiation is different, adjusts the speed of outlet pipe water outlet, to make the heat collector velocity of rotation and sun of solar water heater
The speed of light deflection is corresponding.
It further limits, card slot is offered on the circumference of the fixed pulley, the drawstring is stuck in card slot.Such structure
Design can prevent drawstring and fixed pulley to be detached from, and guarantee that brush sweeps structure normal work.
It further limits, the quantity of first spring is four, and is evenly distributed on four angles of rectangular slab bottom.
Such structure design, uniform force, elastic effect are good.
It further limits, is connected with reinforcing rod on described two rack bodies.Such structure design, can be improved bracket
Stability, it is sturdy and durable.
Using the utility model of the technical program, which is mounted on roof, then by the collection of flat plate solar water heater
Hot device is mounted on bottom plate;When work, water is filled into the first water tank by water inlet first, due to gravity, angle
Regulating mechanism gradually rotates bottom plate and heat collector with the change in solar irradiation direction together;Meanwhile from the first water tank
The water of discharge is entered in the second water tank by outlet pipe, and as the total weight of the second water tank and water gradually increases, brush is swept
Mechanism completes the cleaning to heat collector.
, there is the following in the advantages of the utility model:
1, the setting of angle adjusting mechanism can be such that heat collector rotates automatically with the change in solar irradiation direction, from
And heat collector is made to remain vertical with sunlit direction, to improve the utilization rate of solar energy;
2, the setting of brushing mechanism can automatically clear up the dust on heat collector, to guarantee heat collector surface
Cleaning, further increase the utilization rate of solar energy.
Detailed description of the invention
The utility model can be further illustrated by the nonlimiting examples that attached drawing provides;
Fig. 1 is a kind of structural schematic diagram one of rack of solar water heater embodiment of the utility model;
Fig. 2 is a kind of structural schematic diagram two of rack of solar water heater embodiment of the utility model;
Main element symbol description is as follows:
Rack body 1, crossbeam 11, rectangular ring structure 12, reinforcing rod 13, bottom plate 2, sliding slot 21, rectangular slab 3, the first bullet
Spring 31, mandril 32, idler wheel 33, the first water tank 34, water inlet 35, outlet pipe 36, sliding rail 41, cross bar 42, baffle 43, the second bullet
Spring 44, link 45, drawstring 46, the second water tank 47, water outlet 48, fixed pulley 49.
Specific embodiment
It is right with reference to the accompanying drawings and examples in order to make those skilled in the art that the utility model may be better understood
Technical solutions of the utility model further illustrate.
As depicted in figs. 1 and 2, the bottom plate 2 in figure is the state of left low and right high, the shape of bracket when which is the dusk
State, when early morning, bottom plate 2 is the state of right low left high, a kind of rack of solar water heater of the utility model, including two by not
Become rusty rack body 1 made of Steel material, and two 1 upper ends of rack body are hinged with bottom plate 2, and 2 bottom of bottom plate offers sliding slot 21, and two
It is connected with crossbeam 11 between a rack body 1, rectangular ring structure 12 is provided in the middle part of crossbeam 11, is pacified in rectangular ring structure 12
Equipped with the angle adjusting mechanism for adjusting heat collector angle, angle adjusting mechanism includes rectangular slab 3, and the four of 3 bottom of rectangular slab
The first spring 31 is respectively connected on a angle, 31 lower end of the first spring is connected in rectangular ring structure 12, and 3 upper surface of rectangular slab connects
It is connected to mandril 32, mandril 32 is for jacking up bottom plate 2, to change the angle of bottom plate 2, in this embodiment, preferred mandril 32
Upper end is connected with idler wheel 33, and perhaps spin idler wheel 33 or rolling ball rolls are connected in sliding slot 21, can reduce mandril 32 in this way
With the frictional force between sliding slot 21, reduce abrasion, to prolong the service life.
The first water tank 34 is connected with by steel wire in the middle part of 3 lower surface of rectangular slab, steel wire passes through rectangular ring structure 12
Centre bore is provided with water inlet 35 on the first water tank 34, and 34 bottom of the first water tank is connected with outlet pipe 36.
When installation, which is mounted on roof, then on a base plate 2 by the heat collector installation of flat plate solar water heater
(heat collector is not drawn into figure);When early morning, bottom plate 2 is made to face the east of sun rise, people are stored up by water inlet 35 to first
Water is filled in water tank 34, due to gravity, the first water tank 34 is pulled downward on rectangular slab 3 by steel wire, makes the first spring
31 in the state for being compressed to extreme lower position, as the water in the first water tank 34 is stored up from the gradually discharge of outlet pipe 36, first
The total weight of water tank 34 and water reduces, and the first spring 31 gradually extends, and the first spring 31 is driven on mandril 32 by rectangular slab 3
It rises, idler wheel 33 or spin roll in sliding slot 21, to make the change of bottom plate 2 and heat collector together with solar irradiation direction
And gradually rotate, to make heat collector always perpendicular to the direction of illumination of sunlight, improve the utilization rate of solar energy.
In the above-described embodiments, it preferably is provided with regulating valve on outlet pipe 36, can be shone in this way according to sunlight throughout the year
The time penetrated is different, the speed that outlet pipe 36 is discharged is adjusted, to make the heat collector velocity of rotation and sunlight of solar water heater
The speed of deflection is corresponding;1,2,3 three gear can be also set in regulating valve, and the corresponding valve opening of these three gears is successively
Increase, makes 1,2,3 grade to be corresponding in turn to summer, spring or autumn, four seasons of winter;When summer, regulating valve is transferred to 1 by sunshine-duration longest
Shelves, valve opening is minimum, and the velocity of discharge of water is minimum in the first water tank 34, to keep bottom plate 2 and heat collector revolving speed most slow;Spring
When season or autumn, the sunshine-duration secondly, regulating valve is transferred to 2 grades, valve opening median size, the row of water in the first water tank 34
Speed is medium out, to keep bottom plate 2 and heat collector revolving speed medium;When winter day, the sunshine-duration is most short, and regulating valve is transferred to 3 grades,
Valve opening is maximum, and the velocity of discharge of water is maximum in the first water tank 34, to keep bottom plate 2 and heat collector revolving speed most fast;In this way
Can be by the different opening of control and regulation valve, the speed phase for changing the revolving speed of bottom plate 2 and heat collector with solar irradiation direction
It adapts to.
In order to clean up the dust accumulated on heat collector, surface is also equipped with brushing mechanism on a base plate 2, and brush is swept
Mechanism includes two sliding rails 41, and two sliding rails 41 are connected to the upper surface of bottom plate 2 and are symmetrical arranged, slide between two sliding rails 41
It is connected with cross bar 42, is provided with bristle on cross bar 42,2 right end of bottom plate is connected with baffle 43, and cross bar 42 and baffle 43 are connected with the
Two springs 44 are connected with link 45 in the middle part of cross bar 42, drawstring 46 are connected on link 45, and 2 left end of bottom plate is connected with fixed pulley 49,
Card slot is offered on the circumference of fixed pulley 49, drawstring 46 is stuck in card slot, and drawstring 46 is around fixed pulley 49 and lower end is connected with the
Two water tanks 47,47 lower end of the second water tank are provided with water outlet 48.
While bottom plate 2 rotates, the water being discharged from the first water tank 34 enters the second water tank 47 by outlet pipe 36
It is interior, as the total weight of the second water tank 47 and water gradually increases, second water tank 47 by drawstring 46 pull cross bar 42 from
The right end of bottom plate 2 is moved to left end, and the dust on heat collector is cleared up in the bristle realization on cross bar 42, ensure that heat collector
The cleaning on surface improves the utilization rate of solar energy;Second spring 44 is elongated simultaneously, and in second day early morning, people pass through water outlet
48 the water in second water tank 47 is discharged, and cross bar 42 is withdrawn into 2 right end of bottom plate by second spring 44, and second spring 44 restores former
It is long, since the weight of 2 right end of bottom plate overweights left end, so bottom plate 2 rotates into the state of right low left high automatically, carry out work next time
The preparation of work, while the water being discharged is added to again in the first water tank 34, realizes recycling for water.
In the above-described embodiments, in order to improve the stability of bracket, reinforcing rod is connected on preferably two rack bodies 1
13.The stability that can be improved bracket in this way keeps bracket sturdy and durable.
A kind of rack of solar water heater provided by the utility model is described in detail above.Specific embodiment
Illustrate the method and its core concept for being merely used to help understand the utility model.It should be pointed out that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvement can also be carried out to the utility model
And modification, modifications and modifications also fall within the protection scope of the claims of the utility model.
Claims (7)
1. a kind of rack of solar water heater, including two rack bodies (1), it is characterised in that: described two rack bodies (1)
Between be connected with crossbeam (11), be provided with rectangular ring structure (12) in the middle part of the crossbeam (11), the rectangular ring structure
(12) angle adjusting mechanism is installed, described two rack body (1) upper ends are hinged with bottom plate (2), bottom plate (2) bottom on
It offers sliding slot (21), bottom plate (2) upper surface is equipped with brushing mechanism;
The angle adjusting mechanism includes rectangular slab (3), and rectangular slab (3) bottom is connected with the first spring (31), and described
One spring (31) lower end is connected on rectangular ring structure (12), and rectangular slab (3) upper surface is connected with mandril (32), described
It is connected with the first water tank (34) in the middle part of rectangular slab (3) lower surface by steel wire, the steel wire passes through rectangular ring structure (12)
Centre bore, be provided with water inlet (35) on first water tank (34), the first water tank (34) bottom is connected with out
Water pipe (36);
The brushing mechanism includes two sliding rails (41), and described two sliding rails (41) are connected to the upper surface of bottom plate (2) and symmetrical
It is arranged, is slidably connected cross bar (42) between described two sliding rails (41), be provided with bristle, the bottom plate on the cross bar (42)
(2) right end is connected with baffle (43), and the cross bar (42) and baffle (43) are connected with second spring (44), in the cross bar (42)
Portion is connected with link (45), is connected with drawstring (46) on the link (45), and bottom plate (2) left end is connected with fixed pulley
(49), the drawstring (46) is around fixed pulley (49) and lower end is connected with the second water tank (47), second water tank (47)
Lower end is provided with water outlet (48).
2. a kind of rack of solar water heater according to claim 1, it is characterised in that: mandril (32) the upper end connection
Have idler wheel (33), the idler wheel (33), which rolls, to be connected in sliding slot (21).
3. a kind of rack of solar water heater according to claim 1, it is characterised in that: mandril (32) upper end rolls
It is connected with spin, the rolling ball rolls are connected in sliding slot (21).
4. a kind of rack of solar water heater according to claim 1, it is characterised in that: be arranged on the outlet pipe (36)
There is regulating valve.
5. a kind of rack of solar water heater according to claim 1, it is characterised in that: the circumference of the fixed pulley (49)
On offer card slot, the drawstring (46) is stuck in card slot.
6. a kind of rack of solar water heater according to claim 1, it is characterised in that: the number of first spring (31)
Amount is four, and is evenly distributed on four angles of rectangular slab (3) bottom.
7. a kind of rack of solar water heater according to claim 1, it is characterised in that: described two rack bodies (1)
On be connected with reinforcing rod (13).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820829855.9U CN208282428U (en) | 2018-05-31 | 2018-05-31 | Solar water heater support |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820829855.9U CN208282428U (en) | 2018-05-31 | 2018-05-31 | Solar water heater support |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208282428U true CN208282428U (en) | 2018-12-25 |
Family
ID=64705589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820829855.9U Expired - Fee Related CN208282428U (en) | 2018-05-31 | 2018-05-31 | Solar water heater support |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208282428U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111371398A (en) * | 2020-03-16 | 2020-07-03 | 李龙洋 | Solar panel |
CN111940345A (en) * | 2020-07-29 | 2020-11-17 | 成都恒云高科科技有限公司 | Solar panel cleaning device based on self-rotation |
CN112178689A (en) * | 2020-08-19 | 2021-01-05 | 华帝股份有限公司 | Fire-picking device |
CN116094445A (en) * | 2022-12-29 | 2023-05-09 | 深圳市伟欣诚科技有限公司 | Remote carbon emission detection device |
-
2018
- 2018-05-31 CN CN201820829855.9U patent/CN208282428U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111371398A (en) * | 2020-03-16 | 2020-07-03 | 李龙洋 | Solar panel |
CN111940345A (en) * | 2020-07-29 | 2020-11-17 | 成都恒云高科科技有限公司 | Solar panel cleaning device based on self-rotation |
CN111940345B (en) * | 2020-07-29 | 2022-06-14 | 成都恒云高科科技有限公司 | Solar panel cleaning device based on self-rotation |
CN112178689A (en) * | 2020-08-19 | 2021-01-05 | 华帝股份有限公司 | Fire-picking device |
CN116094445A (en) * | 2022-12-29 | 2023-05-09 | 深圳市伟欣诚科技有限公司 | Remote carbon emission detection device |
CN116094445B (en) * | 2022-12-29 | 2024-02-13 | 深圳市伟欣诚科技有限公司 | Remote carbon emission detection device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN208282428U (en) | Solar water heater support | |
CN201715763U (en) | Solar energy receiving device with self-adjusted angle | |
CN201569253U (en) | Moveable solar energy drying device | |
CN206207760U (en) | A kind of solar water heater of angle adjustable | |
CN208309955U (en) | A kind of architectural design roof cornice water-tight device | |
CN2809507Y (en) | Adjustable reflector for horizontally arranged solar heat collector | |
CN202645053U (en) | Moveable solar bathroom | |
CN201259331Y (en) | Solar water heater | |
CN109186104A (en) | A kind of antifreeze anti-thermal change inclination angle heat collector excessively | |
CN209181062U (en) | A kind of agricultural facility confession heating system | |
CN215863694U (en) | Solar heating system | |
CN211650769U (en) | Solar water heater capable of improving energy conversion rate | |
CN2854450Y (en) | Dust remover of solar water heater | |
CN208754224U (en) | A kind of solar energy power store device for greenhouse gardening | |
CN206073469U (en) | Small apartment solar energy heating system | |
CN212227392U (en) | Energy-concerving and environment-protective solar energy hot-water heating equipment | |
CN208112579U (en) | A kind of anti-accumulated snow device of solar energy photovoltaic panel | |
CN215562970U (en) | Prevent energy-conserving building roof rainwater collection device of jam | |
CN211476344U (en) | City green energy-saving building | |
CN211650771U (en) | Self-rotating solar electric water heater capable of generating power | |
CN218499038U (en) | Complementary photovoltaic power generation device | |
CN2872209Y (en) | Solar water heater connected with window | |
CN215562968U (en) | Solar energy and rainwater are collected and are utilized environmental protection roof structure | |
CN213657159U (en) | Solar water heating device | |
CN209960784U (en) | Wall-mounted solar water heater with movable heat collector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20181218 Address after: 400039 No. 18, Shiqiaopu Yuzhou Road, Jiulongpo District, Chongqing, 6-1-2 Co-patentee after: CHONGQING HI-TECH INCUBATION CENTER Patentee after: CHONGQING XIAGUANG TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 400039 Shiqiaopu No. 18, Jiulongpo District, Chongqing 6-1-2 Patentee before: CHONGQING XIAGUANG TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 |