CN110822100A - Water valve capable of being automatically closed after power failure of gas water heater and water heater with same - Google Patents
Water valve capable of being automatically closed after power failure of gas water heater and water heater with same Download PDFInfo
- Publication number
- CN110822100A CN110822100A CN201910782474.9A CN201910782474A CN110822100A CN 110822100 A CN110822100 A CN 110822100A CN 201910782474 A CN201910782474 A CN 201910782474A CN 110822100 A CN110822100 A CN 110822100A
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- Prior art keywords
- valve
- water
- permanent magnet
- port
- power supply
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A water valve capable of being automatically closed after a gas water heater is powered off is characterized by comprising a valve shell, a first permanent magnet, an electromagnet, a control circuit module and a light-emitting device, wherein the first permanent magnet is arranged at one end of the valve shell; the electromagnet is arranged on the valve rod; the control circuit module is connected with the electromagnet; the valve rod is movably arranged in the valve casing, and a valve plate capable of opening and closing the valve port is arranged on the valve rod. The invention also discloses a water heater. After the control circuit module is powered off, the electromagnet is powered on and generates a repulsive force with the first permanent magnet, so that the valve rod is driven to be far away from the first permanent magnet, the valve plate closes the valve port, and water can be cut off under the condition that the water heater is powered off.
Description
Technical Field
The invention relates to a water inlet valve, which is applied to a gas water heater and also relates to a water heater.
Background
In the current society, the temperature is changed frequently, and when cold air comes, the frost crack of the gas water heater occurs in a plurality of regions which are far from south. Although the common gas water heater is provided with an anti-freezing structure, most anti-freezing mechanisms can work only under the condition of being electrified.
When the power supply is forgotten to be plugged, the situation that power is cut off, gas is cut off and water is not cut off can still occur, the whole machine is frozen and cracked, and because the water inlet valve is not closed in time, the whole machine leaks water, so that property loss and safety problems such as floor water soaking, electric leakage and the like are caused.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a water valve that automatically closes after the power failure of a gas water heater, in view of the above technical situation.
The second technical problem to be solved by the present invention is to provide a water heater capable of automatically closing a water valve after a power failure of a gas water heater, in view of the above technical situation.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a water valve capable of automatically closing after power failure of a gas water heater is characterized by comprising
The valve shell is provided with a water inlet port, a water outlet port and a valve port positioned between the water inlet port and the water outlet port;
a first permanent magnet provided at one end of the valve housing;
a valve rod movably arranged in the valve casing, wherein a valve plate capable of opening and closing the valve port is arranged on the valve rod;
the electromagnet is arranged on the valve rod;
the control circuit module is connected with the electromagnet; and
when the control circuit module is in a power-on state, the electromagnet cannot be powered on, the valve rod is close to the first permanent magnet under the action of the magnetic attraction force of the first permanent magnet, and the valve plate opens the valve port;
under the power-off state of the control circuit module, the electromagnet is electrified and generates a repulsive force with the first permanent magnet, the valve rod overcomes the magnetic attraction of the first permanent magnet and is far away from the first permanent magnet, and the valve plate closes the valve port.
The valve port is provided with a second permanent magnet capable of magnetically attracting the valve plate. The second permanent magnet attracts the valve plate to ensure that the valve block is closed.
In order to improve the sealing performance, a sealing sleeve is sleeved on the valve plate.
The valve rod is connected with a lifting rod, and the lifting rod is exposed out of the valve shell. When the water valve is restarted, the lifting rod can drive the valve rod to restore the original position, and the valve port is opened.
Furthermore, a partition board is arranged in the valve shell and divides the inner cavity of the valve shell into a first cavity and a second cavity, the valve rod penetrates through the partition board, the first permanent magnet and the electromagnet are located in the first cavity, and the valve port and the valve plate are located in the second cavity.
In order to ensure that the valve rod moves stably and accurately, a guide cylinder protruding from the end face of the partition plate is formed in the middle of the partition plate, and the valve rod is located in the guide cylinder.
Further, the outer wall of the valve rod is provided with a sealing ring in airtight contact with the guide cylinder, and the lower end face of the partition plate is provided with a sealing gasket positioned in the second cavity.
Further, the valve casing includes casing and valve gap, the baffle locate on the port of casing and form the second cavity, aforementioned valve gap locate the outer end of baffle and with the baffle between form first cavity, first permanent magnet locate on the valve gap.
The control circuit module can comprise a power supply port, a power supply, a normally closed relay, a diode and a driver, wherein the positive electrode and the negative electrode of the power supply port are connected with the positive electrode and the negative electrode of the driver; the anode of the diode is connected with the anode of the power supply port, and the cathode of the diode is connected with the anode of the power supply; the negative electrode of the power supply is connected with the negative electrode of the power supply port; the first contact of the normally closed relay is connected with the positive pole of the power supply, and the second contact is connected with the positive pole of the wiring terminal of the electromagnet; the negative electrode of the power supply is connected with the negative electrode of the connecting terminal of the electromagnet; the driver is connected with the control end of the normally closed relay; the power supply, the diode and the power supply port form a charging loop, and the power supply, the normally closed relay and the wiring terminal of the electromagnet form a discharging loop.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the water heater comprises a water heater body and a water valve, wherein the water heater body is provided with a cold water inlet pipe and a hot water outlet pipe, and the water valve is arranged on the cold water inlet pipe. The water valve can be automatically closed after power failure.
Compared with the prior art, the invention has the advantages that: after the control circuit module is powered off, the electromagnet is powered on and generates a repulsive force with the first permanent magnet, so that the valve rod is driven to be away from the first permanent magnet, the valve plate closes the valve port, water can be cut off under the condition that the water heater is powered off, and property loss and potential safety hazards such as water leakage of the whole water heater can be avoided.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is an enlarged view of the water valve of fig. 1.
Fig. 3 is a circuit diagram of the control circuit module.
Fig. 4 is a block diagram of the working principle of the water valve.
Fig. 5 is a state diagram when the water valve is closed.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the gas water heater includes a water heater body 100 and a water valve 10, the water heater body 100 has a cold water inlet pipe 101 and a hot water outlet pipe 102, and the water valve 10 is disposed on the cold water inlet pipe 101.
As shown in fig. 2, the water valve 10 in this embodiment includes a valve housing 1, a first permanent magnet 21, an electromagnet 4, a control circuit module 6, and a valve stem 3.
The valve casing 1 is provided with a water inlet port 14, a water outlet port 13 and a valve port 15 positioned between the water inlet port 14 and the water outlet port 13; the valve port 15 is provided with a second permanent magnet 22 capable of magnetically attracting the valve plate 31. Specifically, the valve housing 1 includes a housing 11 and a valve cover 12, and the partition 4 is provided on an end port of the housing 11 and forms a second cavity in which the valve port 15 is located. The valve cover 12 is arranged at the outer end of the partition plate 4 and forms a first cavity with the partition plate 4, and the first permanent magnet 21 and the electromagnet 4 are positioned in the first cavity. The first permanent magnet 21 is provided on the valve cover 12. The middle part of the clapboard 4 is provided with a guide cylinder 41 which is protruded from the end surface of the clapboard 4, and the lower end surface of the clapboard 4 is provided with a sealing gasket 42 which is positioned in the second cavity.
The electromagnet 4 is arranged on the valve rod 3; the control circuit module 6 is connected with the electromagnet 4.
The valve rod 3 is movably arranged in the valve casing 1, a valve plate 31 capable of opening and closing the valve port 15 is arranged on the valve rod 3, and a sealing sleeve 32 is sleeved on the valve plate 31. The valve rod 3 is connected with a lifting rod 35, and the lifting rod 35 is exposed out of the valve cover 12. The valve stem 3 is located in the guide cylinder 41. The outer wall of the valve rod 3 is provided with a sealing ring 33 which is in sealing contact with the guide cylinder 41.
As shown in fig. 3 and 4, the control circuit module 6 in this embodiment includes a power supply port 61, a power supply 63, a normally closed relay 64, a diode 62, and a driver 65, where the positive and negative poles of the power supply port 61 are connected to the positive and negative poles of the driver 65; the anode of the diode 62 is connected with the anode of the power supply port 61, and the cathode is connected with the anode of the power supply 63; the negative electrode of the power supply 63 is connected with the negative electrode of the power supply port 61; a first contact of the normally closed relay 64 is connected with the positive electrode of the power supply 63, and a second contact is connected with the positive electrode of the wiring terminal of the electromagnet 4; the negative electrode of the power supply 63 is connected with the negative electrode of the wiring terminal of the electromagnet 4; the driver 65 is connected with the control end of the normally closed relay 64; the power supply 63, the diode 62 and the power supply port 61 form a charging circuit, and the power supply 63, the normally closed relay 64 and the connection terminal of the electromagnet 4 form a discharging circuit.
As shown in fig. 2, when the power supply port 61 is energized (i.e., when the control circuit module 6 is energized), the electromagnet 4 is not energized, the valve rod 3 is close to the first permanent magnet 21 by the magnetic attraction of the first permanent magnet 21, and the valve plate 31 opens the valve port 15; referring to fig. 5, when the power supply port 61 is powered off (i.e. when the control circuit module 6 is powered off), the electromagnet 4 is energized and generates a repulsive force with the first permanent magnet 21, so that the valve rod 3 is away from the first permanent magnet 21, and the valve plate 31 closes the valve port 15. When the valve needs to be started again, the lifting rod 35 is pulled out, and the valve rod 3 is attracted with the first permanent magnet 21.
Claims (10)
1. A water valve capable of automatically closing after power failure of a gas water heater is characterized by comprising
The valve shell is provided with a water inlet port, a water outlet port and a valve port positioned between the water inlet port and the water outlet port;
a first permanent magnet provided at one end of the valve housing;
a valve rod movably arranged in the valve casing, wherein a valve plate capable of opening and closing the valve port is arranged on the valve rod;
the electromagnet is arranged on the valve rod;
the control circuit module is connected with the electromagnet; and
when the control circuit module is in a power-on state, the electromagnet cannot be powered on, the valve rod is close to the first permanent magnet under the action of the magnetic attraction force of the first permanent magnet, and the valve plate opens the valve port;
under the power-off state of the control circuit module, the electromagnet is electrified and generates a repulsive force with the first permanent magnet, the valve rod overcomes the magnetic attraction of the first permanent magnet and is far away from the first permanent magnet, and the valve plate closes the valve port.
2. The water valve of claim 1, wherein the valve port has a second permanent magnet that magnetically attracts the valve plate, the second permanent magnet being located between the first permanent magnet and the electromagnet.
3. The water valve capable of being automatically closed after the power failure of the gas water heater as claimed in claim 1, wherein a sealing sleeve is sleeved on the valve plate.
4. The water valve of claim 1, wherein the valve stem is connected to a lifting rod, the lifting rod being exposed from the valve housing.
5. The water valve of claim 1, wherein the valve housing has a partition dividing an inner cavity of the valve housing into a first cavity and a second cavity, the valve stem extends through the partition, the first permanent magnet and the electromagnet are disposed in the first cavity, and the valve port and the valve plate are disposed in the second cavity.
6. A water valve as claimed in claim 5, which can be automatically closed when the water heater is powered off, wherein a guide cylinder protruding from the end face of the partition is formed in the middle of the partition, and the valve stem is located in the guide cylinder.
7. A water valve as claimed in claim 6, wherein the outer wall of the valve stem has a sealing ring in sealing contact with the guide cylinder, and the lower end surface of the partition has a sealing gasket located in the second cavity.
8. The water valve as claimed in claim 5, wherein the valve housing includes a housing and a valve cover, the partition is disposed at the end of the housing and forms the second cavity, the valve cover is disposed at the outer end of the partition and forms the first cavity with the partition, and the first permanent magnet is disposed on the valve cover.
9. The water valve capable of being automatically closed after the power failure of the gas water heater according to claim 1, wherein the control circuit module comprises a power supply port, a power supply, a normally closed relay, a diode and a driver, and the anode and the cathode of the power supply port are connected with the anode and the cathode of the driver; the anode of the diode is connected with the anode of the power supply port, and the cathode of the diode is connected with the anode of the power supply; the negative electrode of the power supply is connected with the negative electrode of the power supply port; the first contact of the normally closed relay is connected with the positive pole of the power supply, and the second contact is connected with the positive pole of the wiring terminal of the electromagnet; the negative electrode of the power supply is connected with the negative electrode of the connecting terminal of the electromagnet; the driver is connected with the control end of the normally closed relay; the power supply, the diode and the power supply port form a charging loop, and the power supply, the normally closed relay and the wiring terminal of the electromagnet form a discharging loop.
10. A water heater with the water valve as claimed in any one of claims 1 to 9, comprising a water heater body (100) and the water valve (10), wherein the water heater body (100) is provided with a cold water inlet pipe (101) and a hot water outlet pipe (102), and the water valve (10) is arranged on the cold water inlet pipe (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910782474.9A CN110822100B (en) | 2019-08-23 | 2019-08-23 | Water valve capable of being automatically closed after power failure of gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910782474.9A CN110822100B (en) | 2019-08-23 | 2019-08-23 | Water valve capable of being automatically closed after power failure of gas water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110822100A true CN110822100A (en) | 2020-02-21 |
| CN110822100B CN110822100B (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910782474.9A Active CN110822100B (en) | 2019-08-23 | 2019-08-23 | Water valve capable of being automatically closed after power failure of gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110822100B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566711A (en) * | 2019-08-30 | 2019-12-13 | 宁波方太厨具有限公司 | Water valve capable of being automatically closed after power failure of gas water heater and water heater with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5384252A (en) * | 1976-12-29 | 1978-07-25 | Takagi Sangyo Kk | Antifreezing drainage means for hydrant type gas appliances |
| CN2154983Y (en) * | 1993-04-27 | 1994-02-02 | 吴健伦 | Gas water heater |
| CN2295092Y (en) * | 1996-11-08 | 1998-10-21 | 黄俊诚 | Water-pressure linkage gas electromagnetic valve |
| CN2308779Y (en) * | 1997-05-26 | 1999-02-24 | 黄俊诚 | Water pressure linkage gas electromagnetic valve with sealed capsule |
| CN2828663Y (en) * | 2005-07-21 | 2006-10-18 | 中山华帝燃具股份有限公司 | Antifreezing device for high-efficient heated gas water heater |
| CN201182570Y (en) * | 2008-03-13 | 2009-01-21 | 黄伟聪 | Steam mop with automatic water-breaking valve during current failure |
| CN202813794U (en) * | 2012-07-23 | 2013-03-20 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and drain antifreeze device |
| CN203432060U (en) * | 2013-09-03 | 2014-02-12 | 中山市超人电器有限公司 | Gas water heater capable of automatically draining water and preventing congealment |
| CN204513779U (en) * | 2015-02-03 | 2015-07-29 | 广东万家乐燃气具有限公司 | A kind of gas heater automatic drainage freeze preventer |
| US20160348952A1 (en) * | 2015-05-26 | 2016-12-01 | General Electric Company | Heat pump water heater appliance and an electronic mixing valve |
| CN109028589A (en) * | 2018-06-27 | 2018-12-18 | 珠海格力电器股份有限公司 | Drainage anti-freezing system, electrical equipment and drainage method |
-
2019
- 2019-08-23 CN CN201910782474.9A patent/CN110822100B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5384252A (en) * | 1976-12-29 | 1978-07-25 | Takagi Sangyo Kk | Antifreezing drainage means for hydrant type gas appliances |
| CN2154983Y (en) * | 1993-04-27 | 1994-02-02 | 吴健伦 | Gas water heater |
| CN2295092Y (en) * | 1996-11-08 | 1998-10-21 | 黄俊诚 | Water-pressure linkage gas electromagnetic valve |
| CN2308779Y (en) * | 1997-05-26 | 1999-02-24 | 黄俊诚 | Water pressure linkage gas electromagnetic valve with sealed capsule |
| CN2828663Y (en) * | 2005-07-21 | 2006-10-18 | 中山华帝燃具股份有限公司 | Antifreezing device for high-efficient heated gas water heater |
| CN201182570Y (en) * | 2008-03-13 | 2009-01-21 | 黄伟聪 | Steam mop with automatic water-breaking valve during current failure |
| CN202813794U (en) * | 2012-07-23 | 2013-03-20 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and drain antifreeze device |
| CN203432060U (en) * | 2013-09-03 | 2014-02-12 | 中山市超人电器有限公司 | Gas water heater capable of automatically draining water and preventing congealment |
| CN204513779U (en) * | 2015-02-03 | 2015-07-29 | 广东万家乐燃气具有限公司 | A kind of gas heater automatic drainage freeze preventer |
| US20160348952A1 (en) * | 2015-05-26 | 2016-12-01 | General Electric Company | Heat pump water heater appliance and an electronic mixing valve |
| CN109028589A (en) * | 2018-06-27 | 2018-12-18 | 珠海格力电器股份有限公司 | Drainage anti-freezing system, electrical equipment and drainage method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566711A (en) * | 2019-08-30 | 2019-12-13 | 宁波方太厨具有限公司 | Water valve capable of being automatically closed after power failure of gas water heater and water heater with same |
| CN110566711B (en) * | 2019-08-30 | 2022-01-25 | 宁波方太厨具有限公司 | Water valve capable of being automatically closed after power failure of gas water heater and water heater with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110822100B (en) | 2021-08-20 |
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