CN110940060A - Multi-connected air conditioning unit and power-limiting operation control method thereof - Google Patents
Multi-connected air conditioning unit and power-limiting operation control method thereof Download PDFInfo
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- CN110940060A CN110940060A CN201911296580.2A CN201911296580A CN110940060A CN 110940060 A CN110940060 A CN 110940060A CN 201911296580 A CN201911296580 A CN 201911296580A CN 110940060 A CN110940060 A CN 110940060A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 41
- 238000007664 blowing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005057 refrigeration Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a multi-connected air conditioning unit and a power-limiting operation control method thereof. Therefore, under the condition that the total refrigerating capacity is limited, the indoor unit with higher indoor temperature is preferentially cooled, so that the operation effect of the indoor unit is ensured to the maximum extent.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-connected air conditioning unit and a power-limiting operation control method thereof.
Background
In order to deal with the peak power consumption problem, some countries begin to adopt a method of limiting the total power consumption of users during the peak power consumption period, for example, australia subsidizes an electric appliance with a power limit tag, and the electric appliance limits its own input power after receiving a tag signal sent by a power grid. In order to adapt to the power-limiting service environment of a power grid, an air conditioning unit product needs to have a corresponding power limiting function. However, under the condition of limited power, when a large number of indoor units are started, the operation effect of the air conditioning unit is greatly influenced.
Disclosure of Invention
The invention mainly aims to provide a multi-connected air conditioning unit and a power-limiting operation control method thereof, and aims to solve the technical problem that in the prior art, under the condition of power limitation, when the total refrigerating capacity required by an indoor unit is greater than the limit value of the total refrigerating capacity of an outdoor unit, the operation effect of the air conditioning unit is greatly influenced.
When the unit is in a power limiting state, the total refrigerating capacity of the indoor units is limited, the outdoor units are controlled to supply cold to the indoor units according to priority levels, and the outdoor units are controlled to supply cold to the indoor units with higher indoor temperature preferentially for the indoor units with the same level.
When the total refrigerating capacity required by the indoor unit is larger than the limit value of the total refrigerating capacity of the outdoor unit, the lowest settable temperature of the indoor unit is limited according to the outdoor temperature.
Wherein, when the outdoor temperature of the indoor unit is more than T1The lowest temperature of the indoor unit is T2(ii) a When the outdoor temperature of the indoor unit is less than or equal to T1When the temperature of the indoor unit is lower than the preset temperature, the lowest possible temperature of the indoor unit = outdoor temperature-X; wherein, T1>T2And X is a parameter.
And the indoor unit which does not obtain cooling starts an air supply mode.
The indoor temperatures of all the started indoor units are obtained at preset time intervals, and the outdoor units are controlled to supply cold to the indoor units from high to low according to the sequence of the indoor temperatures.
Wherein the preset time is 10 minutes.
Wherein, after each indoor unit starts to operate, the indoor units do not participate in priority judgment within 30 minutes.
Wherein the priority ranking ranks VIP and normal, wherein VIP has a higher priority ranking than normal. .
Wherein, when the indoor temperature of the indoor unit is more than T3And then, the indoor unit is defaulted to be the highest priority in the common levels.
A multi-connected air conditioning unit uses the power-limiting operation control method.
According to the multi-connected air conditioning unit and the power-limited operation control method thereof, the outdoor unit is controlled to supply cold to the indoor unit according to the priority level, and the outdoor unit is controlled to supply cold to the indoor unit with higher indoor temperature preferentially for the indoor units with the same level. Therefore, under the condition that the total refrigerating capacity is limited, the indoor unit with higher indoor temperature is preferentially cooled, so that the operation effect of the indoor unit is ensured to the maximum extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart illustrating a power-limited operation control method of a multi-connected air conditioning unit according to the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, under the condition of limited power, when a large number of indoor units are started, the total refrigerating capacity required by the indoor units easily exceeds the limit value of the total refrigerating capacity of the outdoor unit, so that the total refrigerating capacity after power limitation cannot meet all the started indoor units. In an actual situation, there are indoor units with high indoor temperature (requiring a large cooling capacity) and indoor units with low indoor temperature (requiring a small cooling capacity), and since all the started indoor units are cooled according to the average cooling capacity (the limit value of the total cooling capacity of the outdoor unit is divided by the number of the started indoor units), the indoor units with high indoor temperature cannot obtain preferential cooling and are in a high-temperature state, thereby affecting the operation effect of the air conditioning unit.
In this embodiment, when the unit is in the power-limited state, the total cooling capacity of the indoor units is limited, the outdoor units are controlled to supply cooling to the indoor units according to the priority levels, and the outdoor units are controlled to supply cooling to the indoor units with higher indoor temperatures preferentially for the indoor units of the same level. Therefore, under the condition that the total refrigerating capacity is limited, the indoor unit with higher indoor temperature is preferentially cooled, so that the operation effect of the indoor unit is ensured to the maximum extent.
In this embodiment, the host receives a power limit signal sent by a power grid, and controls the outdoor unit to limit the total cooling capacity of the indoor unit according to the power limit signal. If the total cooling capacity of the indoor unit is 60% of that of the outdoor unit and the total cooling capacity of the outdoor unit is 30KW, the total cooling capacity of the indoor unit is 18 KW.
In this embodiment, the host computer obtains the indoor temperatures of all the turned-on indoor units through the temperature sensors disposed on the indoor units.
In this embodiment, the host machine sequences the indoor units according to the indoor temperatures from high to low, and controls the outdoor unit to sequentially supply cold to the indoor units according to the sequence until the total cooling capacity of the indoor units reaches the limit value of the total cooling capacity of the outdoor unit.
For example, if the total cooling capacity of the outdoor unit is 10KW, the limit value is 6KW, which is equivalent to 6KW of the total cooling capacity of the indoor unit. There are 5 indoor units now, and the required refrigerating capacity of every indoor unit is 2KW, and the indoor temperature of first indoor unit now is 38 degrees, and the indoor temperature of second indoor unit is 38.5 degrees, and the indoor temperature of third indoor unit is 37.5 degrees, and the indoor temperature of fourth indoor unit is 32 degrees, and the indoor temperature of fifth indoor unit is 35. The host machine sequences 5 indoor units according to the indoor temperature from high to low, wherein the sequence is a second indoor unit, a first indoor unit, a third indoor unit, a fifth indoor unit and a fourth indoor unit. Because the required refrigerating capacity of each indoor unit is 2KW, and the outdoor unit (6 KW) can only supply cold for 3 indoor units, the outdoor unit preferentially supplies cold for the second indoor unit, the first indoor unit and the third indoor unit, so that the indoor unit with higher indoor temperature can preferentially supply cold, and the operation effect of the air conditioning unit is ensured.
In this embodiment, the indoor temperature of each indoor unit is obtained, and the outdoor unit is controlled to sequentially supply cooling to each indoor unit according to the indoor temperature from high to low. Under the condition that the total refrigerating capacity is limited, the indoor unit with higher indoor temperature is preferentially supplied with cold, so that the operation effect of the indoor unit is ensured to the maximum extent.
In this embodiment, the indoor temperatures of all the turned-on indoor units are obtained at preset time intervals.
Specifically, the host machine obtains the indoor temperatures of all started indoor machines every 10min, so that the host machine can timely perform cooling control on the indoor machines with higher indoor temperatures, and the running timeliness of the air conditioning unit is guaranteed.
In the embodiment, after each indoor unit starts to operate, priority judgment is not participated in within 30 minutes, so that each indoor unit can stably operate within a preset time, the indoor units are prevented from frequently operating within a short time, and the operation reliability of the air conditioning unit is improved.
In this embodiment, the VIP and the normal are prioritized, wherein the VIP is higher in priority than the normal.
Specifically, the staff can set VIP on the indoor unit, when the staff sets VIP, the indoor unit sends a VIP signal to the host, and after the host receives the VIP signal, the outdoor unit is controlled to supply cold to the indoor unit first, which is equivalent to that the indoor unit is not limited by the power limiting signal.
In this embodiment, when the indoor temperature of the indoor unit is greater than T3And then, the indoor unit is defaulted to be the highest priority in the common levels.
Wherein, T3At 35 degrees, T can be understood3The angle is not limited to 35 degrees, and the angle is determined according to actual requirements.
Specifically, when the indoor temperature of the indoor unit is greater than T3And when the indoor temperature reaches the unacceptable degree of the user, the outdoor unit is controlled preferentially to supply cold to the indoor unit, so that the refrigeration requirement of the user is ensured.
In this embodiment, when the total cooling capacity required by the indoor units is greater than the limit value of the total cooling capacity of the outdoor unit, the minimum settable temperature of the indoor units for cooling is limited.
The inventor finds that if the total refrigerating capacity of the existing outdoor unit is 10KW, the limit value is 6KW, 5 indoor units exist, the required refrigerating capacity of each indoor unit is 2KW, and since the actual total refrigerating capacity of the outdoor unit is only used by 3 indoor units, the refrigerating requirements of the 5 indoor units cannot be met at the same time, and therefore 2 indoor units which do not supply cold start the air supply mode (the air supply mode is completed by the fan of the indoor unit). If only 3 sets of indoor units with higher indoor temperature are cooled, the 2 sets of indoor units with lower temperature cannot be cooled, and therefore the operation effect of the air conditioning unit is affected. At present, by limiting the lowest settable temperature of the indoor unit which obtains cooling, once the indoor unit which obtains cooling reaches the lowest settable temperature, the cooling is stopped, and the indoor unit which does not obtain cooling is cooled, so that the indoor unit which does not obtain cooling can obtain cooling as soon as possible, and the operation effect of the air conditioning unit is ensured.
For example, if the indoor temperatures of 3 indoor units with higher indoor temperatures are 34 degrees, 33.5 degrees and 32 degrees, the indoor temperatures set by the user for the 3 indoor units are 20 degrees, and in order to reach the indoor temperatures set by the user (longer time), the 3 indoor units with cooling function are in a cooling state for a long time, so that the 2 indoor units without cooling function cannot be cooled in a short time, thereby affecting the operation effect of the air conditioning unit. The lowest temperature that can set of 3 indoor sets that the restriction obtained the cooling now, if the temperature that can set up at present is 27 degrees, in case 3 indoor sets that obtain the cooling reach 27 degrees (can reach in the short time), just stop the cooling, and then supply cold for 2 indoor sets that do not obtain the cooling for the off-premises station can supply cold for all indoor sets, thereby guarantees air conditioning unit's operational effect.
In this embodiment, when the outdoor temperature of the indoor unit is greater than T1The lowest temperature of the indoor unit is T2。
Wherein, T1At 30 degrees, T2At 28 degrees, T can be understood1Not limited to 30 degrees, T2The angle is not limited to 28 degrees, and is determined according to actual requirements.
For example, if the outdoor temperature of the indoor unit is 33 degrees, the temperature of 33 degrees is greater than T1(30 degrees), the lowest possible temperature of the indoor unit having an outdoor temperature of 33 degrees is T2(28 degrees). Now, the user sets the indoor temperature of the indoor unit to 26 degrees through the remote controller, but the host does not reduce the indoor temperature of the indoor unit to 26 degrees according to the indoor temperature set by the user, and when the indoor temperature of the indoor unit is reduced to 28 degrees, the outdoor unit is controlled to stop supplying cold to the indoor unit, and the indoor unit which does not obtain cold supply is supplied with cold instead, so that the indoor unit which does not obtain cold supply obtains cold supply in a short time, and the operation effect of the air conditioning unit is ensured.
In this embodiment, when the outdoor temperature of the indoor unit is less than or equal to T1The lowest possible temperature of the indoor unit = outdoor temperature-X.
Wherein, X is 2 degrees, it can be understood that X is not limited to 2 degrees, and is determined according to actual requirements.
For example, if the outdoor temperature of the indoor unit is 29 degrees, the 29 degrees is less than T1(30 degrees), the lowest settable temperature of the indoor unit whose outdoor temperature is 29 degrees is 27 (29-2 degrees). Now, the user sets the indoor temperature of the indoor unit to 25 degrees through the remote controller, but the host does not reduce the indoor temperature of the indoor unit to 25 degrees according to the indoor temperature set by the user, and when the indoor temperature of the indoor unit is reduced to 27 degrees, the outdoor unit is controlled to stop supplying cold to the indoor unit, and the indoor unit which does not obtain cold supply is supplied with cold, so that the indoor unit which does not obtain cold supply obtains cold supply in a short time, and the indoor unit obtains cold supply from the remote controllerAnd the operation effect of the air conditioning unit is ensured.
In this embodiment, the indoor unit that does not obtain cooling starts the air blowing mode.
As shown in fig. 1, a method for controlling an air conditioning unit is provided, which specifically includes the following steps:
s101, receiving a power limiting signal.
And S102, limiting the total refrigerating capacity of the indoor unit according to the power limiting signal.
And S103, controlling the outdoor unit to supply cold to the indoor unit most preferentially when the VIP signal sent by the indoor unit is received.
And S104, controlling the outdoor unit to sequentially supply cold to each indoor unit according to the indoor temperature from high to low.
And S105, controlling the outdoor unit to preferentially supply cold to the indoor unit when the temperature of the indoor unit is greater than the temperature threshold value.
And S106, when the total refrigerating capacity required by the indoor unit is larger than the limit value of the total refrigerating capacity of the outdoor unit, limiting to obtain the lowest settable temperature of the cooling indoor unit.
In one embodiment, a multi-connected air conditioning unit is provided, and the multi-connected air conditioning unit uses the power-limited operation control method of any one of the foregoing embodiments.
In view of the above description of the multi-connected air conditioning unit and the method for controlling the operation of the multi-connected air conditioning unit in a limited power manner, those skilled in the art will recognize that the concepts of the embodiments of the present invention may be modified in the specific embodiments and the application scope.
Claims (10)
1. A power-limited operation control method for a multi-connected air conditioning unit is characterized in that when the unit is in a power-limited state, the total refrigerating capacity of indoor units is limited, the outdoor units are controlled to supply cold to the indoor units according to priority levels, and the outdoor units are controlled to supply cold to the indoor units with higher indoor temperature preferentially for the indoor units with the same level.
2. The control method of claim 1, wherein when the total cooling capacity required by the indoor unit is greater than the limit value of the total cooling capacity of the outdoor unit, the minimum settable temperature of the indoor unit is limited according to the outdoor temperature.
3. The control method according to claim 2, wherein when the outdoor temperature of the indoor unit is greater than T1The lowest temperature of the indoor unit is T2(ii) a When the outdoor temperature of the indoor unit is less than or equal to T1When the temperature of the indoor unit is lower than the preset temperature, the lowest possible temperature of the indoor unit = outdoor temperature-X; wherein, T1>T2And X is a parameter.
4. The control method according to claim 2, wherein the indoor unit that does not obtain cooling starts the blowing mode.
5. The control method of claim 1, wherein the indoor temperatures of all the turned-on indoor units are obtained at predetermined intervals, and the outdoor unit is controlled to supply cooling to the indoor units in the order of the indoor temperatures from high to low.
6. The control method according to claim 5, characterized in that the preset time is 10 minutes.
7. The control method according to claim 1, wherein the priority determination is not performed within 30 minutes after each indoor unit starts operating.
8. The control method of claim 1, wherein the priority levels are VIP and normal, wherein VIP has a higher priority than normal.
9. The control method according to claim 1, wherein when the indoor temperature of the indoor unit is greater than T3And then, the indoor unit is defaulted to be the highest priority in the common levels.
10. A multi-connected air conditioning unit, characterized in that it uses the power-limited operation control method as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296580.2A CN110940060A (en) | 2019-12-16 | 2019-12-16 | Multi-connected air conditioning unit and power-limiting operation control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296580.2A CN110940060A (en) | 2019-12-16 | 2019-12-16 | Multi-connected air conditioning unit and power-limiting operation control method thereof |
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| CN110940060A true CN110940060A (en) | 2020-03-31 |
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| CN201911296580.2A Pending CN110940060A (en) | 2019-12-16 | 2019-12-16 | Multi-connected air conditioning unit and power-limiting operation control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576829A (en) * | 2020-11-30 | 2022-06-03 | 广东美的制冷设备有限公司 | Multi-connected air conditioner, control method thereof and computer readable storage medium |
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| CN1621758A (en) * | 2003-11-26 | 2005-06-01 | 日立空调系统株式会社 | Air conditioner |
| EP2314942A3 (en) * | 2009-10-21 | 2012-02-29 | Mitsubishi Electric Corporation | Air-conditioning apparatus control device and refrigerating apparatus control device |
| CN105333581A (en) * | 2015-12-07 | 2016-02-17 | 江苏省电力公司 | Load-relation-based control method for orderly power utility of multi-couple unit central air-conditioner |
| EP3005852A1 (en) * | 2013-06-03 | 2016-04-13 | Frascold S.p.A. | Cooling device for a frequency converter, converter assembly comprising said cooling device and refrigerating or conditioning plant comprising said converter assembly |
| CN108562019A (en) * | 2018-04-02 | 2018-09-21 | 广东美的暖通设备有限公司 | Control method and control system, the air-conditioning system of air-conditioning system |
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2019
- 2019-12-16 CN CN201911296580.2A patent/CN110940060A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1621758A (en) * | 2003-11-26 | 2005-06-01 | 日立空调系统株式会社 | Air conditioner |
| EP2314942A3 (en) * | 2009-10-21 | 2012-02-29 | Mitsubishi Electric Corporation | Air-conditioning apparatus control device and refrigerating apparatus control device |
| EP3005852A1 (en) * | 2013-06-03 | 2016-04-13 | Frascold S.p.A. | Cooling device for a frequency converter, converter assembly comprising said cooling device and refrigerating or conditioning plant comprising said converter assembly |
| CN105333581A (en) * | 2015-12-07 | 2016-02-17 | 江苏省电力公司 | Load-relation-based control method for orderly power utility of multi-couple unit central air-conditioner |
| CN108562019A (en) * | 2018-04-02 | 2018-09-21 | 广东美的暖通设备有限公司 | Control method and control system, the air-conditioning system of air-conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114576829A (en) * | 2020-11-30 | 2022-06-03 | 广东美的制冷设备有限公司 | Multi-connected air conditioner, control method thereof and computer readable storage medium |
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Application publication date: 20200331 |