CN113959060A - Power-on control circuit, detection circuit and fault judgment method of air conditioner outdoor unit - Google Patents
Power-on control circuit, detection circuit and fault judgment method of air conditioner outdoor unit Download PDFInfo
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- CN113959060A CN113959060A CN202111232724.5A CN202111232724A CN113959060A CN 113959060 A CN113959060 A CN 113959060A CN 202111232724 A CN202111232724 A CN 202111232724A CN 113959060 A CN113959060 A CN 113959060A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000007257 malfunction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
-
- 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
-
- 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
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, in particular to a power-on control circuit, a detection circuit and a fault judgment method of an outdoor unit of an air conditioner, which solve the problem that the complexity of an outdoor unit circuit is increased due to soft start in the prior art by setting the soft start of the outdoor unit in an indoor unit, and simultaneously reduce the rated current requirement of a first control switch, thereby solving the problem of higher cost caused by using two control switches with higher rated currents.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a power-on control circuit, a detection circuit and a fault judgment method of an air conditioner outdoor unit.
Background
When the outdoor unit of the air conditioner is not in operation or the whole unit is in a standby state, in order to save power, the outdoor unit needs to be in a non-power-on state, as shown in fig. 1 in the prior art, the outdoor unit power-on control circuit comprises an indoor control unit, an outdoor unit working circuit, an indoor control switch S11, an outdoor control switch S12 and a resistor R11, the resistor R11 is a ptc (positive Temperature coefficient) component, when the outdoor unit working circuit is powered on, the indoor control unit controls the indoor control switch S11 to be closed, a capacitor in the outdoor unit working circuit is charged through the resistor R11, after the outdoor unit working circuit is stabilized, the outdoor control unit controls the outdoor control switch S12 to be closed, the resistor R11 is short-circuited, the outdoor unit working circuit enters a stable working state to realize soft start, at this time, currents flowing through the indoor control switch S11 and the outdoor control switch S12 are currents required by the operation of the outdoor unit, this requires that the rated currents of the indoor control switch S11 and the outdoor control switch S12 are matched with the current of the outdoor unit operating circuit when it is operating stably, which results in the need to use a control switch with a large rated current in both the circuits of the indoor unit and the outdoor unit.
In the prior art, if the outdoor unit cannot work normally, the indoor unit uniformly responds that the outdoor unit cannot communicate with the outdoor unit, so that when the indoor unit and the outdoor unit cannot communicate normally, the outdoor unit may be powered on normally, short-circuited or the communication circuit has problems, however, the specific problems cannot be determined, which brings great difficulty to after-sale maintenance of the air conditioner.
Disclosure of Invention
The technical problems solved by the invention are as follows: the utility model provides a circular telegram control circuit, detection circuitry and fault diagnosis method of air condensing units, solve the problem that outdoor unit circuit increases the circuit complexity because of soft start among the prior art to solve simultaneously and use the higher problem of cost because of using two control switch that rated current is great, further solve when indoor unit and outdoor unit can't communicate the problem that whether because of the power supply problem arouses.
The invention adopts the technical scheme for solving the technical problems that: the outdoor unit electrifying control circuit of the air conditioner comprises an indoor control unit and an outdoor unit working circuit, wherein the outdoor unit working circuit comprises a plurality of capacitors, and the outdoor unit electrifying control circuit of the air conditioner also comprises a first control switch, a second control switch and a first resistor which are positioned in an indoor unit; the first control switch is connected with the first resistor in series, and the second control switch is connected with a series circuit of the first control switch and the first resistor in parallel; one end of the second control switch is connected with a live wire of an alternating current power supply, and the other end of the second control switch is connected to an outdoor unit working circuit; the control end of the first control switch is connected with the indoor control unit, the control end of the second control switch is controlled by a control signal, the control signal is sent out after the capacitor in the working circuit of the outdoor unit is charged to an expected value, and the rated current of the first control switch is smaller than that of the second control switch.
Furthermore, one end of the second control switch is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the first control switch, and the other end of the first control switch is connected with the other end of the second control switch.
Furthermore, the power-on control circuit of the air conditioner outdoor unit further comprises a delay circuit unit, and the control signal is sent by the delay circuit unit.
Further, the control signal is sent by the indoor control unit.
Further, when the outdoor unit is powered on, the first control switch is intermittently closed.
Further, the method for judging the fault of the working circuit of the outdoor unit of the air conditioner is characterized in that a first threshold value and a second threshold value are set, the first threshold value is smaller than the second threshold value, and after the first control switch is closed, when the effective value of the voltage drop of the first resistor is lower than the first threshold value, the working circuit of the outdoor unit is in an open circuit state; when the effective voltage drop value of the first resistor is larger than the second threshold value, the working circuit of the outdoor unit is in short circuit; when the effective voltage drop value of the first resistor is between the first threshold and the second threshold, the outdoor unit working circuit is normal.
Furthermore, the detection circuit of the air conditioner outdoor unit comprises a first diode, a second resistor and a third resistor, wherein the anode of the first diode is connected with one end, away from the live wire, of the first resistor, the cathode of the first diode is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the third resistor, the other end of the third resistor is grounded, and the common end of the second resistor and the third resistor serves as a signal acquisition end of the working circuit of the detection outdoor unit.
Further, the method for judging the fault of the working circuit of the air conditioner outdoor unit by using the detection circuit comprises the following steps:
s01, acquiring a representative value V1 of the alternating current;
s02, closing the first control switch, collecting the voltage of the signal collection end, and calculating a representative value V2 of the collected voltage;
s03, when V1-V2 is less than VR1, the outdoor unit working circuit is broken; when V1-V2 is larger than VR2, the outdoor unit working circuit is short-circuited; otherwise, the working circuit of the outdoor unit is normal; the VR1 and VR2 are set thresholds, and VR1 < VR 2.
Further, the representative value is a valid value or a maximum value.
The invention has the beneficial effects that: the power-on control circuit, the detection circuit and the fault judgment method of the air conditioner outdoor unit solve the problem that the circuit complexity of an outdoor unit circuit is increased due to soft start in the prior art by setting the soft start of the outdoor unit in the indoor unit, reduce the rated current requirement of the first control switch at the same time, solve the problem of high cost caused by using two control switches with larger rated currents, and further solve the problem of whether the power supply problem is caused when the indoor unit and the outdoor unit cannot communicate by using the detection circuit and the fault judgment method.
Drawings
Fig. 1 is a prior art circuit diagram of an energization controlling circuit of an outdoor unit of an air conditioner in accordance with the present invention, in which L denotes a live line of ac power, N denotes a neutral line of ac power, S11 denotes an indoor control switch, S12 denotes an outdoor control switch, and R11 denotes a resistor.
Fig. 2 is a circuit diagram of an energization controlling circuit of an outdoor unit of an air conditioner in accordance with the present invention, in which L denotes a live line of ac power, N denotes a neutral line of ac power, S21 denotes a first control switch, S22 denotes a second control switch, and R21 denotes a first resistor.
Fig. 3 is a circuit diagram of a detection circuit of an outdoor unit of an air conditioner according to the present invention, in which L represents a live line of ac power, N represents a neutral line of ac power, S31 represents a first control switch, S32 represents a second control switch, R31 represents a first resistor, R32 represents a second resistor, R33 represents a third resistor, D31 represents a first diode, and V31 represents a signal collection terminal.
Fig. 4 is a voltage waveform diagram of a signal collecting terminal in an embodiment of a detecting circuit of an outdoor unit of an air conditioner according to the present invention.
Fig. 5 is a voltage waveform diagram of a first resistor in an embodiment of a detection circuit of an outdoor unit of an air conditioner according to the present invention.
Detailed Description
The outdoor unit power-on control circuit of the air conditioner comprises an indoor control unit and an outdoor unit working circuit, wherein the outdoor unit working circuit comprises a plurality of capacitors, and the outdoor unit power-on control circuit of the air conditioner also comprises a first control switch, a second control switch and a first resistor which are positioned in an indoor unit; the first control switch is connected with the first resistor in series, and the second control switch is connected with a series circuit of the first control switch and the first resistor in parallel; one end of the second control switch is connected with a live wire of an alternating current power supply, and the other end of the second control switch is connected to an outdoor unit working circuit; the control end of the first control switch is connected with the indoor control unit, the control end of the second control switch is controlled by a control signal, the control signal is sent out after the capacitor in the working circuit of the outdoor unit is charged to an expected value, and the rated current of the first control switch is smaller than that of the second control switch.
Furthermore, one end of the second control switch is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the first control switch, and the other end of the first control switch is connected with the other end of the second control switch.
Furthermore, the power-on control circuit of the air conditioner outdoor unit further comprises a delay circuit unit, and the control signal is sent by the delay circuit unit.
Further, the control signal is sent by the indoor control unit.
Further, when the outdoor unit is powered on, the first control switch is intermittently closed.
Further, the method for judging the fault of the working circuit of the outdoor unit of the air conditioner is characterized in that a first threshold value and a second threshold value are set, the first threshold value is smaller than the second threshold value, and after the first control switch is closed, when the effective value of the voltage drop of the first resistor is lower than the first threshold value, the working circuit of the outdoor unit is in an open circuit state; when the effective voltage drop value of the first resistor is larger than the second threshold value, the working circuit of the outdoor unit is in short circuit; when the effective voltage drop value of the first resistor is between the first threshold and the second threshold, the outdoor unit working circuit is normal.
Furthermore, the detection circuit of the air conditioner outdoor unit comprises a first diode, a second resistor and a third resistor, wherein the anode of the first diode is connected with one end, away from the live wire, of the first resistor, the cathode of the first diode is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the third resistor, the other end of the third resistor is grounded, and the common end of the second resistor and the third resistor serves as a signal acquisition end of the working circuit of the detection outdoor unit.
Further, the method for judging the fault of the working circuit of the air conditioner outdoor unit by using the detection circuit comprises the following steps:
s01, acquiring a representative value V1 of the alternating current;
s02, closing the first control switch, collecting the voltage of the signal collection end, and calculating a representative value V2 of the collected voltage;
s03, when V1-V2 is less than VR1, the outdoor unit working circuit is broken; when V1-V2 is larger than VR2, the outdoor unit working circuit is short-circuited; otherwise, the working circuit of the outdoor unit is normal; the VR1 and VR2 are set thresholds, and VR1 < VR 2.
Further, the representative value is a valid value or a maximum value.
Example (b):
as shown in fig. 2, the power-on control circuit of the outdoor unit of the air conditioner of the present invention includes an indoor control unit and an outdoor unit working circuit, and further includes a first control switch S21, a second control switch S22 and a first resistor R21 located in the indoor unit; one end of the first resistor R21 is connected to one end of the second control switch S22 and to the ac power live wire L, the other end of the first resistor R21 is connected to one end of the first control switch S21, the other end of the first control switch S21 is connected to the other end of the second control switch S22 and to the outdoor unit working circuit, the control end of the first control switch S21 is connected to the indoor control unit, the control end of the second control switch S21 is controlled by a control signal, the control signal is sent out when the capacitor in the outdoor unit working circuit is charged as expected, and the rated current of the first control switch at the control end of the first control circuit is smaller than the rated current of the second control switch.
In this embodiment, the outdoor unit does not have a soft start switch, a resistor and a corresponding start switch control circuit, thereby solving the problem that the circuit complexity of the outdoor unit circuit is increased due to soft start in the prior art.
In this embodiment, the first control switch S21 may be a relay, an ac contactor, or other power switch device, the second control switch S22 may also be a relay, an ac contactor, or other power switch device, the first resistor R21 may be a PTC resistor or a general power resistor with a constant resistance value, the rated current of the first control switch S21 may be much smaller than the rated current of the second control switch S22, specifically, the rated current of the second control switch S22 needs to satisfy the power of the outdoor unit, and the rated current of the first control switch S21 only needs to satisfy the condition that the rated current is not smaller than the rated voltage of the operation of the air conditioner outdoor unit divided by the rated resistance of the first resistor R21, thereby solving the problem of high cost caused by using two control switches with larger rated circuits.
In this embodiment, when the outdoor unit needs to be powered on, the soft start control circuit composed of the first control switch S21, the second control switch S22 and the first resistor R21 first closes the first switch S21, closes the second control switch S22 after the outdoor unit is precharged, and opens the first control switch S21 or does not open after the second control switch S22 is closed, specifically, the second control switch may be controlled by the indoor control unit or controlled by the delay circuit unit, and the delay time is longer than the outdoor unit precharge time. In order to prevent the starting current from being too large due to the fact that part of the outdoor unit capacitor is too large in the power-on process, the first control switch S21 can be intermittently closed until the outdoor unit capacitor is charged, and therefore damage to other devices caused by large current is prevented.
For this embodiment, a detection circuit is designed, as shown in fig. 3, and includes a first diode D31, a second resistor R32, and a third resistor R33, where an anode of the first diode D31 is connected to a common end of the first control switch S31 and the first resistor R31, a cathode of the first diode D31 is connected to one end of the second resistor R32, another end of the second resistor R32 is connected to one end of the third resistor R33, another end of the third resistor R33 is grounded, and a common end of the second resistor R32 and the third resistor R33 serves as a signal acquisition end V31 of the outdoor unit detection operating circuit.
When the detection circuit is applied to a 3P variable-frequency air conditioner with a rated working voltage of 220V, the voltage waveform diagram of a signal acquisition end V31 is shown in figure 4, so that the method for judging the fault of the working circuit of the outdoor unit by using the detection circuit is designed, and comprises the following steps:
s01, acquiring a representative value V1 of the alternating current;
specifically, when the first control switch and the second control switch are both turned off, the voltage of the signal acquisition end is acquired, and a representative value V1 of the voltage in a period of time is calculated;
s02, closing the first control switch, collecting the voltage of the signal collection end, and calculating a representative value V2 of the collected voltage;
specifically, the first control switch is closed, the voltage of the signal acquisition end is acquired, and a representative value V2 of the voltage in the same time in step S01 is calculated;
s03, when V1-V2 is less than VR1, the outdoor unit working circuit is broken; when V1-V2 is larger than VR2, the outdoor unit working circuit is short-circuited; otherwise, the working circuit of the outdoor unit is normal; the VR1 and VR2 are set thresholds, and VR1 < VR2
Specifically, the representative value may be a significant value or a maximum value.
Taking an effective value as an example, the method is applied to a 3P inverter air conditioner with a rated working voltage of 220V, wherein a relay with a rated current of 5A is selected by a first control switch, a PTC resistor with a rated resistance of 50 ohms is selected by a first resistor, a relay with a rated current of 30A is selected by a second control switch, VR1 is set to 5V, VR2 is set to 215V, the sampling time is set to 10ms because the commercial power is 50HZ, an effective value V1 is set to 220V in step S01, if an effective value V2 obtained by calculation is greater than 215V in step S02, an outdoor unit working circuit is disconnected, if V2 is less than 5V, the outdoor unit working circuit is short-circuited, and if V2 is between 5 and 215, the outdoor unit working circuit is normal.
Therefore, the state of the working circuit of the outdoor unit can be judged by the indoor unit main control system, and the result is displayed by the display unit of the air conditioner.
In addition, in the present embodiment, the voltage waveform diagram of the first resistor is as shown in fig. 5, and thus, another method for determining a failure of the outdoor unit is designed, and the method is determined by checking the effective value of the voltage drop of the first resistor. Specifically, a first threshold value and a second threshold value are set, the first threshold value is smaller than the second threshold value, when the effective voltage drop value of the first resistor is lower than the first threshold value, the outdoor unit working circuit is in an open circuit state, when the effective voltage drop value of the first resistor is larger than the second threshold value, the outdoor unit working circuit is in a short circuit state, and when the effective voltage drop value of the first resistor is between the first threshold value and the second threshold value, the outdoor unit working circuit is normal.
In another embodiment of the present invention, the positions of the first control switch and the first resistor are switched, and the anode of the first diode of the corresponding detection circuit is connected to the common terminal of the first resistor and the second control switch.
Claims (9)
1. The outdoor unit electrification control circuit of the air conditioner comprises an indoor control unit and an outdoor unit working circuit, wherein the outdoor unit working circuit comprises a plurality of capacitors, and is characterized by further comprising a first control switch, a second control switch and a first resistor which are positioned in an indoor unit; the first control switch is connected with the first resistor in series, and the second control switch is connected with a series circuit of the first control switch and the first resistor in parallel; one end of the second control switch is connected with a live wire of an alternating current power supply, and the other end of the second control switch is connected to an outdoor unit working circuit; the control end of the first control switch is connected with the indoor control unit, the control end of the second control switch is controlled by a control signal, the control signal is sent out after the capacitor in the working circuit of the outdoor unit is charged to an expected value, and the rated current of the first control switch is smaller than that of the second control switch.
2. The outdoor unit power-on control circuit of claim 1, wherein one end of the second control switch is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the first control switch, and the other end of the first control switch is connected to the other end of the second control switch.
3. The outdoor unit energization control circuit of claim 1 or 2, further comprising a delay circuit unit, wherein the control signal is sent by the delay circuit unit.
4. The outdoor unit of claim 1 or 2, wherein the control signal is sent by the indoor control unit.
5. The outdoor unit power-on control circuit of claim 1 or 2, wherein the first control switch is intermittently closed when the outdoor unit is powered on.
6. The method for determining the fault of the working circuit of the outdoor unit of the air conditioner as claimed in claim 1 or 2, wherein a first threshold and a second threshold are set, the first threshold is smaller than the second threshold, and after the first control switch is closed, when the effective value of the voltage drop of the first resistor is lower than the first threshold, the working circuit of the outdoor unit is in an open circuit; when the effective voltage drop value of the first resistor is larger than the second threshold value, the working circuit of the outdoor unit is in short circuit; when the effective voltage drop value of the first resistor is between the first threshold and the second threshold, the outdoor unit working circuit is normal.
7. The detection circuit applied to the energization control circuit of the outdoor unit of an air conditioner as claimed in claim 1 or 2, wherein the detection circuit comprises a first diode, a second resistor and a third resistor, the anode of the first diode is connected to one end of the first resistor far from the live wire, the cathode of the first diode is connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third resistor, the other end of the third resistor is grounded, and the common end of the second resistor and the third resistor serves as a signal acquisition end for detecting the working circuit of the outdoor unit.
8. The method for determining the malfunction of the operating circuit of the outdoor unit of the air conditioner using the detecting circuit of claim 7, comprising the steps of:
s01, acquiring a representative value V1 of the alternating current;
s02, closing the first control switch, collecting the voltage of the signal collection end, and calculating a representative value V2 of the collected voltage;
s03, when V1-V2 is less than VR1, the outdoor unit working circuit is broken; when V1-V2 is larger than VR2, the outdoor unit working circuit is short-circuited; otherwise, the working circuit of the outdoor unit is normal; the VR1 and VR2 are set thresholds, and VR1 < VR 2.
9. The method as claimed in claim 8, wherein the representative value is a valid value or a maximum value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232724.5A CN113959060A (en) | 2021-10-22 | 2021-10-22 | Power-on control circuit, detection circuit and fault judgment method of air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232724.5A CN113959060A (en) | 2021-10-22 | 2021-10-22 | Power-on control circuit, detection circuit and fault judgment method of air conditioner outdoor unit |
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| Publication Number | Publication Date |
|---|---|
| CN113959060A true CN113959060A (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111232724.5A Pending CN113959060A (en) | 2021-10-22 | 2021-10-22 | Power-on control circuit, detection circuit and fault judgment method of air conditioner outdoor unit |
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| CN (1) | CN113959060A (en) |
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| CN112909892A (en) * | 2021-03-02 | 2021-06-04 | 四川长虹空调有限公司 | Air conditioner electrical safety control method and system |
| US20210270484A1 (en) * | 2020-03-02 | 2021-09-02 | Lennox Industries Inc. | System and method for identifying causes of hvac system faults |
| CN113432241A (en) * | 2021-06-21 | 2021-09-24 | Tcl空调器(中山)有限公司 | Air conditioner indoor and outdoor unit communication fault processing method, control system and air conditioner |
-
2021
- 2021-10-22 CN CN202111232724.5A patent/CN113959060A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105223428A (en) * | 2014-06-20 | 2016-01-06 | 青岛海尔科技有限公司 | A kind of air-condition faults pick-up unit, method and system |
| CN204794747U (en) * | 2015-06-24 | 2015-11-18 | 广州视源电子科技股份有限公司 | Air conditioner supply circuit |
| CN107143964A (en) * | 2016-03-01 | 2017-09-08 | 珠海格力电器股份有限公司 | Start-up circuit and air conditioner for starting air-conditioning |
| CN209169958U (en) * | 2019-01-16 | 2019-07-26 | 美的集团武汉制冷设备有限公司 | Power-supplying circuit and transducer air conditioning |
| US20210037626A1 (en) * | 2019-07-31 | 2021-02-04 | Consumer Lighting (U.S.), Llc | Dummy load circuit and electrical load for single live wire switch |
| US20210270484A1 (en) * | 2020-03-02 | 2021-09-02 | Lennox Industries Inc. | System and method for identifying causes of hvac system faults |
| CN112909892A (en) * | 2021-03-02 | 2021-06-04 | 四川长虹空调有限公司 | Air conditioner electrical safety control method and system |
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Application publication date: 20220121 |