CN208536396U - A kind of constant-temperature effluent based on gas heater, water-saving control system - Google Patents
A kind of constant-temperature effluent based on gas heater, water-saving control system Download PDFInfo
- Publication number
- CN208536396U CN208536396U CN201820462642.7U CN201820462642U CN208536396U CN 208536396 U CN208536396 U CN 208536396U CN 201820462642 U CN201820462642 U CN 201820462642U CN 208536396 U CN208536396 U CN 208536396U
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- Prior art keywords
- water
- temperature
- gas heater
- constant
- control system
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/025—Water supply lines as such, e.g. shower hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Devices For Medical Bathing And Washing (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a kind of constant-temperature effluent based on gas heater, water-saving control system, it is related to the gas heater system regions based on thermo-electric generation；It includes the switch unit of gas heater, the water pipe connecting with gas heater, the spray head connecting with water pipe and control system, the water pipe includes the return branch that one end is connect with hot water outlet end and the other end is connect with cooling water inlet end, it is provided in the return branch and realizes that the valve group of waterway circulating and control valve group realize that constant-temperature effluent and water-saving wireless low-power consumption control unit, the switch unit are also used to that control parameter is arranged for controlling water flow；The utility model solves the problems, such as that the water tank of existing system setting large volume and the heating of mixing tank bring are slow, realizing power supply by temperature-difference power generation module boosting, there are security risks, easy circular heating is reached, low-consumption wireless controls constant-temperature effluent, improves the effect of water-saving performance, energy-efficient performance and security performance.
Description
Technical field
The utility model relates to the gas heater system regions based on thermo-electric generation, especially a kind of to be based on gas and hot water
Constant-temperature effluent, the water-saving control system of device.
Background technique
Gas heater initial start lasts about 20s or so to steady operation, during which the water in heat exchanger for gas water heaters
And the remaining water in pipeline has little time sufficiently heating and is just discharged, and great sense of discomfort is had if being expelled directly out, after human contact,
And cause the waste of great lot of water resources；China's distribution of water resources difference is huge, and some areas are chronically at exsiccosis, combustion gas heat
The number that hydrophone uses is more, wastes also more serious；Existing water-heater system, which uses, in view of the above problems adds water tank, mixes
Water tank and sensor, by the water temperature at detection spray head, control leads to the valve at water tank, cold water is recycled to water tank,
Cold water enters mixed water tank by heating, and hot water and cold water is comprehensive to be obtained preference temperature and be just discharged, and has achieved the purpose that water-saving, but deposits
In following disadvantage: 1, water tank and mixed water tank are added, the volume of whole system is excessive, and pipeline corresponds to length increase, and heating is slack-off,
Because needing hot water to be higher than general set temperature using integrated temperature, long term high temperature may cause hot-water line service life and shorten；
2, the power supply of whole system is all made of temperature-difference power generation module and is warming up to the normal power supply that 12V guarantees all devices from 3.7V, because setting
The environment set is chronically at wet environment, and voltage is more than safe voltage (being lower than 5V), and there are security risks.So needing a kind of base
Automatic temperature-control can be realized by the waterway circulating of simple structure in the system of gas heater, reach safety and comfort, water-saving
Effect.
Utility model content
The purpose of this utility model is that: the utility model provides a kind of constant-temperature effluent based on gas heater, section
Water control system, the water tank and the heating of mixing tank bring for solving existing system setting large volume are sent out slowly, by the temperature difference
Electric module boosting realizes that power supply has security risk.
The technical solution adopted in the utility model is as follows:
A kind of constant-temperature effluent based on gas heater, water-saving control system, including gas heater and gas heater
The switch unit of the water pipe of connection, the spray head connecting with water pipe and control system, the water pipe include one end and hot water outlet end
Connection and the return branch that connect with cooling water inlet end of the other end are provided with for controlling water flow realization water in the return branch
The valve group and control valve group of road circulation realize that constant-temperature effluent and water-saving wireless low-power consumption control unit, the switch unit are also used
In setting control parameter.
Preferably, the valve group includes the check valve being arranged in return branch and the electromagnetism for controlling spray head sprinkling
Valve, check valve setting is at return branch cooling water inlet end, for controlling from hot water outlet and not up to set temperature
Hot water flows to cooling water inlet via return branch, the solenoid valve setting spray head proximal end, the solenoid valve and check valve by
The power supply of wireless low-power consumption control unit.Realize that the hot water for being not up to certain temperature realizes circulation by control solenoid valve and check valve
Heating, water-saving result is good, and structure is simple, and temperature adjustment can be realized in no setting is required water tank and mixed water tank, reduces volume, operation letter
Just, it saves water.
Preferably, the valve group further includes the water pump being arranged in outside bathroom, and the water pump is powered by external power supply.By Gao Gong
Consumption is separately powered with low-power consumption, is guaranteed that low-power consumption comes from thermo-electric generation, be ensure that Electrical Safety while realizing energy conservation, improve
The safety of room control system.
Preferably, the wireless low-power consumption control unit includes winding the temperature difference being arranged in return branch by clad
Electricity generation module, the closed container that clad lower end is set, the temperature sensor A being connect with temperature-difference power generation module and temperature sensing
Device B, the temperature sensor A is arranged in temperature-difference power generation module, for the temperature of water gage glass and water, the temperature sensor B
It is arranged in temperature-difference power generation module outer surface, for surveying environment temperature.Using thermo-electric generation, realizes low-power consumption power supply, promote energy conservation
With it is water-saving.
Preferably, be provided in the closed container wireless device, with wireless device be electrically connected control device and with
The energy storage device of temperature-difference power generation module connection, the temperature sensor A are connect with control device, and the temperature-difference power generation module is nothing
Line apparatus and control device provide safety power supply.The valve groups such as control device and solenoid valve realize wireless control, avoid existing laying
The shortcomings that electric wire bring security risk.
Preferably, the wireless device includes WiFi module A and WiFi module B, and the control device includes control circuit A
With control circuit B, the WiFi module B, control circuit B and energy storage device are arranged in closed container, the WiFi module A and
Control circuit A is arranged at outdoor water pump.It is wirelessly communicated using WiFi, further realizes low-power consumption, guarantee the stability of system.
Preferably, the switch unit includes showering, and the showering is arranged in return branch, the showering with
Control device connection.The triggering of system is realized by solenoid valve, it is easy to operate.
Preferably, the switch unit further includes movable termination, for setting shower temperature after being wirelessly connected with showering
The parameters such as degree.It opens system in advance by movable termination and is heated and be arranged temperature parameter etc., it is more convenient and humanized.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1. the utility model avoids by setting valve group combination return branch realization circular heating and existing adds large volume
Water tank belt heat slow disadvantage, low power consumption control unit be set, realize wireless control constant-temperature effluent, avoid existing high pressure and
The shortcomings that being routed bring security risk solves water tank and the heating of mixing tank bring of existing system setting large volume
Slowly, boosted by temperature-difference power generation module and realize power supply while needing to be routed the electrical control of realization there are problems that security risk, reached
Easy circular heating is arrived, low-consumption wireless controls constant-temperature effluent, improves the effect of water-saving performance, energy-efficient performance and security performance
Fruit；
2. the utility model uses the power supply circuit of low-power consumption for system power supply, guarantee to realize automatic adjust in the case where safety
Temperature control system；Power supply is water-saving and energy saving using the thermo-electric generation of hot water and environment mainly from the temperature difference；
3. the utility model is wirelessly controlled, judge after detecting temperature, autocontrol valve and water pump into
Row temperature adjustment prevents existing laying wire bring security risk；
4. the water pump of check valve and solenoid valve and external power supply power supply is arranged in the utility model, no setting is required water tank and
Mixed water tank can be realized temperature adjustment, reduce volume, and constant-temperature effluent and highly-safe can be realized in simplicity operation；
5. the switch unit of temperature adjustment parameter can be set by setting for the utility model low power consumption control unit, can set in advance
Warm temperature and time are set, human oriented design is easy to operate, and low energy-consumption electronic device guarantees the stabilization and safety of system operation.
Detailed description of the invention
The utility model will illustrate by example and with reference to the appended drawing, in which:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is temperature-difference power generation module scheme of installation；
Fig. 3 is temperature-difference power generation module front view；
Label declaration: 1- cooling water inlet, 2- water pump, 3- control circuit A, 4-WiFi modules A, 5- gas heater, 6- heat
Water out, 7- showering, 8- temperature-difference power generation module, 9- temperature sensor A, 10- temperature sensor B, 11- clad, 12- energy storage
Device, 13- control circuit B, 14-WiFi module B, 15- solenoid valve, 16- spray head, 17- return branch, 18- check valve, 19- water
Pipe, 20- closed container, the hot end 21- fine aluminium heat conducting module, 22- semiconductor cooler, 23- cold end fine aluminium radiating module, 24- gold
Belong to heat dissipation foot, 25- sealing ring.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It elaborates below with reference to Fig. 1-3 pairs of the utility model.
Embodiment 1
A kind of constant-temperature effluent based on gas heater, water-saving control system, including gas heater 5 and gas and hot water
The switch unit of water pipe 19, the spray head 16 connecting with water pipe 19 and control system that device 5 connects, water pipe 19 include one end and hot water
The return branch 17 that 6 ends connect and the other end is connect with 1 end of cooling water inlet is exported, is provided in return branch 17 for controlling water
Stream realizes that the valve group of waterway circulating and control valve group realize constant-temperature effluent and water-saving wireless low-power consumption control unit, switch unit
It is also used to that control parameter is arranged.
Working principle: after detecting 19 temperature of water pipe by temperature sensor A9, control device passes through wireless device wireless controlled
The opening and closing of valve processed, realizes pipeline loop circulating-heating, and the power supply of whole system is all from temperature-difference power generation module 8 and energy storage device
12, temperature sensor A9 detect 19 temperature of water pipe, and temperature sensor B10 detects environment temperature, utilizes bath tubs 19 and air
The temperature difference generate electricity, realize low-power consumption, avoid the mixed water tank for adding large volume and water tank bring from heating slow disadvantage, adopt
It is control device power supply with low power consumption control unit, avoids existing high pressure bring security risk, solve existing system
The water tank and the heating of mixing tank bring that large volume is arranged realize power supply in the presence of safety slowly, by the boosting of temperature-difference power generation module 8
The problem of hidden danger.
Embodiment 2
Valve group includes the check valve 18 being arranged in return branch 17 and the solenoid valve 15 for controlling the sprinkling of spray head 16, list
It is arranged to valve 18 at 17 cooling water inlet of return branch, 1 end, for controlling the hot water from hot water outlet 6 and not up to set temperature
Cooling water inlet 1 is flowed to via return branch 17, solenoid valve 15 is arranged in 16 proximal end of spray head, and solenoid valve 15 and check valve 18 are by nothing
The power supply of line low power consumption control unit.Valve group further includes the water pump 2 being arranged in outside bathroom, and water pump 2 is powered by external power supply.Water pump 2
Power supply provided by external power supply, remaining power supply is by thermo-electric generation and storage provides, and voltage is that (safe voltage is at least by 5V
Lower than 5V), avoid existing temperature-difference power generation module 8 need boosting (voltage 12V) bring security risk the shortcomings that.
Embodiment 3
Wireless low-power consumption control unit includes winding the thermo-electric generation mould being arranged in return branch 17 by clad 11
Block 8, the closed container 20 that 11 lower end of clad is arranged in, the temperature sensor A9 connecting with temperature-difference power generation module 8 and temperature pass
Sensor B10, temperature sensor A9 are arranged in temperature-difference power generation module 8, for the temperature of water gage glass 19 and water, temperature sensor
B10 is arranged in 8 outer surface of temperature-difference power generation module, for surveying environment temperature；Be provided in closed container 20 wireless device, with it is wireless
The control device that device is electrically connected and the energy storage device 12 connecting with temperature-difference power generation module 8, temperature sensor A9 and control fill
Connection is set, temperature-difference power generation module 8 provides safety power supply for wireless device and control device；Wireless device include WiFi module A4 and
WiFi module B14, the control device include control circuit A3 and control circuit B13, the WiFi module B14, control circuit
B13 and energy storage device 12 are arranged in closed container 20, and the WiFi module A4 and control circuit A3 are arranged in outdoor water pump 2
Place；Temperature sensor A9 and temperature sensor B10 uses DS18B20, and temperature-difference power generation module uses TEC1-12706T200, WiFi
Modules A 4 and WiFi module B14 are using ZBT series or HLK series, and low in energy consumption, the voltage of thermo-electric generation is enough to power for it,
Guarantee the stability and safety of low power operation；The front view of temperature-difference power generation module 8 is as shown in Figure 3: successively setting from top to bottom
It is set to hot end fine aluminium heat conducting module 21, semiconductor cooler 22, cold end fine aluminium radiating module 23 and heat dissipation metal foot 24；Wherein partly
Conductor refrigerator 22 is arranged in sealing ring 25, and closely binds in hot end fine aluminium heat conducting module 21 and cold end fine aluminium radiating module
Between 23, as shown in Figure 2: clad 11 is installed on the water pipe 19 for closing on spray head 16, then the fixed temperature on clad 11
Poor electricity generation module 8 can bind contact surface with heat conductive silica gel, and be fixed with screw, WiFi module B14, control circuit B13 and storage
Energy device 12 is then encapsulated in closed container 20 with insulation glue, and closed container 20 is installed under clad 11, can both prevent from pacifying
Full hidden danger, and do not influence wireless signal.Similarly the control circuit A3 at water pump 2 and WiFi module A4 also do encapsulation process；It will
Wireless low-power consumption control unit in closed container 20, can prevent steam and splashing in bathroom from making to circuit with sealant sealing
At adverse effect, make device long-term stable operation and without security risk.
Embodiment 4
Switch unit includes showering 7, and showering 7 is arranged in return branch 17, and showering 7 is connect with control device；
Switch unit further includes movable termination, for the parameters such as setting shower temperature after being wirelessly connected with showering 7.Pass through solenoid valve
15 realize the triggering of system, and easy to operate, system of being opened in advance by movable termination is heated and be arranged temperature parameter etc.,
It is more convenient and humanized.
Embodiment 5
System is opened by switch unit when bathing, if selection showering 7 is opened, energy storage device 12 plays a role, and drives
Entire circuit work, until gas heater 5 is in steady-working state.When water temperature is sufficiently large, temperature-difference power generation module 8 is whole
A circuit power supply, and charge again for energy storage device 12, this cyclic process ensure that the self-powered of entire circuit；Combustion gas heat
When hydrophone 5 is just opened, water temperature is not heated to up to specified value, when temperature sensor A9 detects water temperature, water temperature signal feedback
Control circuit B13 is given, control circuit B13 closes solenoid valve 15, while controlling WiFi module B14 and sending a signal to cooling water inlet 1
The WiFi module A4 at place, control circuit A3 herein is connected to signal and opens water pump 2 immediately, due to the effect of check valve 18, water flow
Return branch 17 is flowed to, then flows into after gas heater 5 heats from return branch 17 via cooling water inlet 1 and is flowed from hot water outlet 6
Out, such circulating-heating；After temperature sensor A9 detects that water temperature reaches specified value, control circuit B13 opens solenoid valve 15,
Check valve 18 is closed, and hot water is flowed out from spray head 16.The utility model realizes that circulation adds by setting valve group combination return branch 17
Temperature avoids the existing water tank belt for adding large volume to heat slow disadvantage, low power consumption control unit is arranged, realizes wireless control
Constant-temperature effluent the shortcomings that avoiding existing high pressure and be routed bring security risk, solves existing system setting large volume
Water tank and the heating of mixing tank bring are slow, are boosted by temperature-difference power generation module 8 and realize power supply while needing to be routed realization electrically
There is security risk in control, reached easy circular heating, and low-consumption wireless controls constant-temperature effluent, improve water saving ability
The effect of energy, energy-efficient performance and security performance.
Claims (8)
1. a kind of constant-temperature effluent based on gas heater, water-saving control system, including gas heater (5) and gas and hot water
The switch unit of water pipe (19), the spray head (16) and control system that are connect with water pipe (19) that device (5) connects, it is characterised in that:
The water pipe (19) includes the return branch of one end and the connection of hot water outlet (6) end and the other end and the connection of cooling water inlet (1) end
(17), it is provided on the return branch (17) and realizes that the valve group of waterway circulating and control valve group realize constant temperature for controlling water flow
Water outlet and water-saving wireless low-power consumption control unit, the switch unit are also used to that control parameter is arranged.
2. a kind of constant-temperature effluent based on gas heater according to claim 1, water-saving control system, feature exist
In: the solenoid valve that the valve group includes the check valve (18) being arranged on return branch (17) and sprays for controlling spray head (16)
(15), the check valve (18) setting is held in return branch (17) cooling water inlet (1), for controlling from hot water outlet (6) and
Not up to the hot water of set temperature flows to cooling water inlet (1) via return branch (17), and the solenoid valve (15) is arranged in spray head
(16) proximal end, the solenoid valve (15) and check valve (18) are powered by wireless low-power consumption control unit.
3. a kind of constant-temperature effluent based on gas heater according to claim 2, water-saving control system, feature exist
In: the valve group further includes the water pump (2) being arranged in outside bathroom, and the water pump (2) is powered by external power supply.
4. a kind of constant-temperature effluent based on gas heater according to claim 3, water-saving control system, feature exist
In: the wireless low-power consumption control unit includes the thermo-electric generation being arranged on return branch (17) by clad (11) winding
Closed container (20) in clad (11) lower end of module (8), setting, the temperature sensor A that is connect with temperature-difference power generation module (8)
(9) it is used for water gage glass (19) in temperature-difference power generation module (8) with temperature sensor B (10), temperature sensor A (9) setting
With the temperature of water, the temperature sensor B (10) is arranged in temperature-difference power generation module (8) outer surface, for surveying environment temperature.
5. a kind of constant-temperature effluent based on gas heater according to claim 4, water-saving control system, feature exist
In: the control device and and thermo-electric generation for being provided with wireless device in the closed container (20), being electrically connected with wireless device
The energy storage device (12) of module (8) connection, the temperature sensor A (9) connect with control device, the temperature-difference power generation module
(8) safety power supply is provided for wireless device and control device.
6. a kind of constant-temperature effluent based on gas heater according to claim 5, water-saving control system, feature exist
In: the wireless device include WiFi module A (4) and WiFi module B (14), the control device include control circuit A (3) and
Control circuit B (13), the WiFi module B (14), control circuit B (13) and energy storage device (12) are arranged in closed container (20)
Interior, the WiFi module A (4) and control circuit A (3) are arranged at outdoor water pump (2).
7. a kind of constant-temperature effluent based on gas heater according to claim 1, water-saving control system, feature exist
In: the switch unit includes showering (7), and the showering (7) is arranged on return branch (17), the showering (7)
It is connect with control device.
8. a kind of constant-temperature effluent based on gas heater according to claim 7, water-saving control system, feature exist
In: the switch unit further includes movable termination, for the parameters such as setting shower temperature after being wirelessly connected with showering (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810132757 | 2018-02-09 | ||
| CN2018101327574 | 2018-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208536396U true CN208536396U (en) | 2019-02-22 |
Family
ID=63514052
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820462642.7U Expired - Fee Related CN208536396U (en) | 2018-02-09 | 2018-03-30 | A kind of constant-temperature effluent based on gas heater, water-saving control system |
| CN201810291098.9A Pending CN108548328A (en) | 2018-02-09 | 2018-03-30 | A kind of constant-temperature effluent, water-saving control system based on gas heater |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810291098.9A Pending CN108548328A (en) | 2018-02-09 | 2018-03-30 | A kind of constant-temperature effluent, water-saving control system based on gas heater |
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| Country | Link |
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| CN (2) | CN208536396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548328A (en) * | 2018-02-09 | 2018-09-18 | 何奕 | A kind of constant-temperature effluent, water-saving control system based on gas heater |
| CN113465222A (en) * | 2021-07-07 | 2021-10-01 | 寒地黑土能源科技有限公司 | Solar remote control absorption refrigeration system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534670A (en) * | 2015-01-16 | 2015-04-22 | 靳肖骁 | Bathroom water saving method |
| CN105423567A (en) * | 2016-01-15 | 2016-03-23 | 苏州创必成电子科技有限公司 | Controller of thermoelectric power generation gas water heater |
| CN105805952B (en) * | 2016-02-15 | 2019-10-18 | 广东万家乐燃气具有限公司 | A kind of instant-heating gas heater circulating line control system |
| CN107101360A (en) * | 2017-05-13 | 2017-08-29 | 广东万家乐燃气具有限公司 | A kind of hot water cyclesystem and control method with self power generation |
| CN208536396U (en) * | 2018-02-09 | 2019-02-22 | 何奕 | A kind of constant-temperature effluent based on gas heater, water-saving control system |
-
2018
- 2018-03-30 CN CN201820462642.7U patent/CN208536396U/en not_active Expired - Fee Related
- 2018-03-30 CN CN201810291098.9A patent/CN108548328A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548328A (en) * | 2018-02-09 | 2018-09-18 | 何奕 | A kind of constant-temperature effluent, water-saving control system based on gas heater |
| CN113465222A (en) * | 2021-07-07 | 2021-10-01 | 寒地黑土能源科技有限公司 | Solar remote control absorption refrigeration system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108548328A (en) | 2018-09-18 |
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Granted publication date: 20190222 Termination date: 20210330 |