CN112028141A - Control method of waste hot water collecting equipment - Google Patents
Control method of waste hot water collecting equipment Download PDFInfo
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- CN112028141A CN112028141A CN202010815782.XA CN202010815782A CN112028141A CN 112028141 A CN112028141 A CN 112028141A CN 202010815782 A CN202010815782 A CN 202010815782A CN 112028141 A CN112028141 A CN 112028141A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 298
- 239000002699 waste material Substances 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 238000001914 filtration Methods 0.000 claims abstract description 42
- 238000004140 cleaning Methods 0.000 claims abstract description 35
- 238000010926 purge Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims 8
- 239000012535 impurity Substances 0.000 abstract description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 2
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 2
- 241001330002 Bambuseae Species 0.000 abstract description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 2
- 239000011425 bamboo Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 206010060800 Hot flush Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a control method of waste hot water collecting equipment, wherein when a waste hot water collecting tank is at a normal liquid level, a first water pump runs in a constant liquid level variable frequency mode, and a second water pump is not started; if the collection amount of the waste hot water in the waste hot water collection tank is increased to a first set liquid level, the controller controls the second water pump to start; when the liquid level in the waste hot water collecting tank is lower than a second set liquid level, the controller controls the second water pump to stop running. The invention not only saves energy, but also can prevent the waste hot water tank from overflowing; the filtration equipment can regularly carry out the reverse cleaning according to time, sweep the process, avoid extravagant water source and compressed gas, regularly sweep and just wash when can straining a section of thick bamboo in the filtration equipment and have less impurity, wash promptly easily, the effect is still good to water conservation and compressed gas. After the control method is adopted, the waste hot water collecting tank is provided with the filtering equipment, so that the maintenance cost is greatly reduced, the quality of the waste hot water is better, and the utilization space is larger.
Description
Technical Field
The invention belongs to the technical field of waste heat utilization, and particularly relates to a control method of waste hot water collecting equipment.
Background
The waste hot water collecting device is a waste hot water collecting tank, and the waste hot water is collected into the waste hot water collecting tank and then discharged by a water pump to enter a heat exchanger for heat exchange, or is discharged into the device for utilization, or is directly discharged.
The water pump is also generally started and stopped according to the liquid level of the waste hot water tank, and the water pump is usually started when the liquid level of the waste hot water tank is high; when the liquid level of the waste heat water tank is low, the water pump stops, and if the waste heat water amount is suddenly increased, water overflow is easy to occur at a high liquid level. Although the waste hot water is directly collected into the equipment for utilization, the utilization rate of the waste hot water is highest, and both heat energy and water are utilized, the waste hot water is fed into the equipment for utilization, and a filtering device is additionally arranged at the rear end of a water pump to remove impurities or metal ions in the water. If the waste hot water is dirty, particularly if the collecting pipeline is made of carbon steel, the metal ion content is high, the filter cartridge is easy to block, and the cost for replacing the filter cartridge is high. And the filter equipment needs to be periodically disassembled and cleaned, which consumes a large amount of manpower and material resources. Because the temperature of waste hot water is very high, traditional useless hot water collection device not only consumes the electric energy, can appear overflowing sometimes moreover, influences the site environment.
Disclosure of Invention
The invention aims to provide a control method of waste hot water collecting equipment, which aims to solve the problems that waste heat utilization in the prior art consumes electric energy and overflowing water affects the field environment.
The invention is realized by the following technical scheme:
a control method of a waste hot water collecting apparatus, comprising the steps of:
s1, when the waste hot water collecting tank is at a normal liquid level, starting the equipment, wherein the first water pump runs in a constant liquid level variable frequency mode, and the second water pump is not started;
s2, if the collection amount of waste hot water in the waste hot water collection tank is increased, the controller receives a liquid level signal of the liquid level sensor, when the liquid level in the waste hot water collection tank is increased to a first set liquid level, the controller sends a starting signal to the second water pump, and the second water pump operates according to power frequency;
s3, the controller receives an instant liquid level signal of the liquid level sensor, and when the liquid level in the waste hot water collection tank is lower than a second set liquid level, the controller sends a stop operation signal to the second water pump;
when the liquid level in the waste hot water collecting tank is lower than the ultralow liquid level, the controller sends a stop operation signal to the first water pump, and when the liquid level in the waste hot water collecting tank reaches the normal liquid level, the controller sends a starting signal to the first water pump.
Preferably, the controller controls the first water pump and the second water pump to change the operation mode at intervals of a first set time according to the operation time of the water pump.
Preferably, the first set time is 2000 hours.
Preferably, when the pressure sensor in the waste hot water collection tank detects that the instant pressure is greater than a first set value, the controller sends a control signal to the electric valve at the top of the waste hot water collection tank to control the electric valve to open, flash steam in the waste hot water collection tank enters the water inlet tank, and when the pressure in the waste hot water collection tank drops to a second set value, the controller sends a closing signal to the electric valve to control the electric valve to close.
Preferably, after the waste hot water in the waste hot water collecting tank enters the filtering device for filtering, the water quality index of the filtered waste hot water is monitored by using an online water quality detector, and the following control is performed:
if the water quality index of the waste hot water is lower than or equal to the set value, the controller controls a first outlet of a three-way electric valve connected with a water outlet of the filtering equipment to be opened, and the filtered waste hot water enters a water inlet tank and is directly utilized;
if the water quality index of the waste hot water is higher than the set value, the controller controls a second outlet of a three-way electric valve connected with the water outlet of the filtering equipment to be opened, and the filtered waste hot water is discharged into a heat exchange system for utilization.
Preferably, when the filtering equipment needs to be cleaned, the controller judges whether the liquid level of the waste hot water tank is at a normal liquid level, if the liquid level of the waste hot water collecting tank is at the normal liquid level, the controller controls the first water pump or the second water pump to stop running, the controller controls the automatic cleaning program to start, and when the automatic cleaning program is finished, the controller controls the corresponding first water pump or the corresponding second water pump to start;
if the liquid level of the waste hot water collecting tank is higher than the normal liquid level, the controller controls the automatic cleaning program to be postponed, if the liquid level of the waste hot water collecting tank is reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be started, if the liquid level of the waste hot water collecting tank is not reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be not started within the cleaning period.
Preferably, the automatic cleaning process includes that the controller controls the water inlet electromagnetic valve and the water outlet electromagnetic valve of the filtering device to be closed, the reverse cleaning water inlet valve and the blowdown valve are opened, the reverse cleaning water inlet valve is closed after the reverse cleaning is carried out for the third set time, the blowdown valve continuously drains water for the fourth set time, the controller controls the purge valve to be opened, the purge valve is closed after the purge valve is purged for the fifth set time by using compressed gas, the reverse cleaning water inlet valve is opened again, the reverse cleaning water inlet valve and the blowdown valve are sequentially closed after the reverse cleaning is carried out for the sixth set time, and the automatic cleaning process is finished.
Preferably, in the automatic cleaning process, if the liquid level in the waste hot water collecting tank reaches a first set liquid level, the controller controls the automatic cleaning process to stop, the reverse cleaning water inlet valve or the purge valve is closed, the filtering equipment water inlet valve is opened, the first water pump and the second water pump are controlled to be started simultaneously, the blowdown valve is closed after 1 minute, the filtering equipment water outlet valve is opened, and the waste hot water collecting equipment enters a normal operation state.
The invention has the beneficial effects that:
according to the invention, only two water pumps are arranged at the water outlet of the waste hot water collecting tank, one water pump is operated at variable frequency and constant liquid level, and when the high liquid level is reached, the second water pump is also operated at power frequency, so that the water discharge is increased, and the controller is used for controlling the water pump, therefore, the energy is saved, and the overflow of the waste hot water tank can be prevented. At the water pump delivery port installation filtration equipment of used hot water collection tank, filtration equipment can regularly carry out reverse cleaning according to the time, the process of sweeping, regularly sweep and also need carry out reverse cleaning, sweep when filtration equipment pressure differential is less, at this moment can be with reverse cleaning, sweep the short of time settlement, avoid extravagant water source and compressed gas, regularly sweep and just wash when straining a section of thick bamboo in can with filtration equipment and having less impurity, wash promptly easily, the effect is still good, and water and compressed gas are practiced thrift. After the control method is adopted, the waste hot water collecting tank is provided with the filtering equipment, so that the maintenance cost is greatly reduced, the quality of the waste hot water is better, and the utilization space is larger.
Drawings
Fig. 1 is a flowchart illustrating a method for controlling a waste hot water collecting apparatus according to the present invention.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
The application aims at a control method of a waste hot water collecting system, and the waste hot water collecting system comprises a waste hot water collecting tank, a first water pump, a second water pump, filtering equipment, a water inlet tank, a heat exchange system and a controller; the water outlet of the waste hot water collecting tank is respectively connected with the water inlet of the first water pump and the water inlet of the second water pump through pipelines, the water outlet of the first water pump and the water outlet of the second water pump are both connected with the water inlet of the filtering equipment, the water inlet of the filtering equipment is provided with a water inlet electromagnetic valve of the filtering equipment, the water outlet of the filtering equipment is provided with a three-way electromagnetic valve, the first outlet is communicated with the water inlet tank through a pipeline, and the second outlet is communicated with the heat exchange system through a pipeline; an electric valve is arranged at the top of the waste hot water collecting tank, the outlet of the electric valve is communicated with the water inlet tank, and a pressure sensor and a liquid level sensor are arranged in the waste hot water collecting tank.
The filter equipment is provided with a reverse cleaning water inlet valve, a blowdown valve and a purge valve; the first water pump, the second water pump, the three-way electromagnetic valve, the electric valve, the pressure sensor, the liquid level sensor, the reverse cleaning water inlet valve, the blow-down valve and the water inlet electromagnetic valve of the filtering device are all in electric signal connection with the controller.
As shown in fig. 1, the present application provides a control method of a waste hot water collecting apparatus, including the steps of:
and S1, when the waste hot water collecting tank is at a normal liquid level, starting the equipment, wherein the first water pump runs by adopting constant liquid level frequency conversion to save electric energy, and the second water pump is not started.
S2, if the waste hot water collection amount of the waste hot water collection tank is increased, the controller receives a liquid level signal of the liquid level sensor, when the liquid level in the waste hot water collection tank is increased to a first set liquid level, the controller sends a starting signal to the second water pump, the second water pump runs according to the power frequency, and the first water pump and the second water pump run simultaneously at the moment.
S3, the controller receives an instant liquid level signal of the liquid level sensor, and when the liquid level in the waste hot water collection tank is lower than a second set liquid level, the controller sends a stop operation signal to the second water pump; at the moment, the first water pump still operates in a variable frequency mode.
If the quantity of the waste hot water is very small, when the liquid level in the waste hot water collecting tank is lower than the ultralow liquid level, the controller sends a stop operation signal to the first water pump, the first water pump stops operating, when the liquid level in the waste hot water collecting tank reaches the normal liquid level, the controller sends a starting signal to the first water pump, and the first water pump starts frequency conversion starting operation.
According to the running time of the water pumps, every 2000 hours, the controller controls the first water pump and the second water pump to change a one-time running mode, namely the second water pump runs in a frequency conversion mode, and the first water pump runs at a high liquid level, so that the running time of the two water pumps is equal.
This kind of start-up mode, under the normal conditions, first water pump frequency conversion operation to practice thrift the electric energy, even first water pump trouble because the second water pump opens the start-stop equipment according to height liquid level, the useless hot water in the useless hot water collection tank still can discharge, the unable exhaust condition of useless hot water can not appear.
When a pressure sensor in the waste hot water collecting tank detects that the instant pressure is greater than a first set value, a controller sends a control signal to an electric valve at the top of the waste hot water collecting tank to control the electric valve to open, flash hot steam in the waste hot water collecting tank enters a water inlet tank, and when the pressure in the waste hot water collecting tank drops to a second set value, the controller sends a closing signal to the electric valve to control the electric valve to close. Mainly prevents the excessive pressure of the flash steam in the waste hot water collecting tank and controls the utilization of the flash steam of the waste hot water.
After the waste hot water in the waste hot water collecting tank enters the filtering equipment for filtering, monitoring the water quality index of the filtered waste hot water by using an online water quality detector, and controlling the water quality index as follows:
if the water quality index of the waste hot water is lower than or equal to the set value, the controller controls the first outlet of the three-way electric valve connected with the water outlet of the filtering equipment to be opened, and the filtered waste hot water enters the water inlet tank to be directly utilized.
If the water quality index of the waste hot water is higher than the set value, the controller controls a second outlet of a three-way electric valve connected with the water outlet of the filtering equipment to be opened, and the filtered waste hot water is discharged into a heat exchange system for utilization.
The control method mainly comprises the steps that a water quality detector is arranged at a waste hot water outlet of the filtering equipment, when the water quality index of the waste hot water is low, the waste hot water is proved to be purer and can be directly fed into the equipment for utilization, at the moment, a first outlet of a three-way electric valve is opened, the waste hot water enters a water inlet tank and finally enters the equipment for utilization; if the water quality index is higher, the filtered waste hot water is still unqualified, the second outlet of the three-way electric valve is opened, the waste hot water enters the heat exchange system for heat exchange, and the heat energy is absorbed and utilized.
When the filtering equipment reaches a cleaning period and needs to be cleaned, the controller judges whether the liquid level of the waste hot water tank is at a normal liquid level, if the liquid level of the waste hot water collecting tank is at the normal liquid level, the controller controls the first water pump or the second water pump to stop running, the controller controls the automatic cleaning program to start, and when the automatic cleaning program is finished, the controller controls the corresponding first water pump or the corresponding second water pump to start.
If the liquid level of the waste hot water collecting tank is higher than the normal liquid level, the controller controls the automatic cleaning program to be postponed, if the liquid level of the waste hot water collecting tank is reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be started, if the liquid level of the waste hot water collecting tank is not reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be not started within the cleaning period.
The automatic cleaning program is that the controller controls the water inlet electromagnetic valve and the water outlet electromagnetic valve of the filtering equipment to be closed, the reverse cleaning water inlet valve and the blow-down valve to be opened, the reverse cleaning water inlet valve is closed after the reverse cleaning is carried out for 1 minute, the blow-down valve is continuously drained for 1 minute, the controller controls the blow-down valve to be opened, the blow-down valve is closed after the blow-down is carried out for 1 minute by using compressed gas, the reverse cleaning water inlet valve is opened again, the reverse cleaning water inlet valve and the blow-down valve are closed in sequence after the reverse cleaning is carried out for 1 minute. The reverse cleaning time and the purging time can be set as required.
In the automatic cleaning process, if the liquid level in the waste hot water collecting tank reaches a first set liquid level, the controller controls the automatic cleaning process to stop, the reverse cleaning water inlet valve or the purge valve is closed, the water inlet valve of the filtering equipment is opened, the first water pump and the second water pump are controlled to be started simultaneously, the blow-down valve is closed after 1 minute, the water outlet valve of the filtering equipment is opened, and the waste hot water collecting equipment enters a normal operation state. The control program can prevent the quantity of collected waste hot water from suddenly increasing in the automatic cleaning process of the filtering equipment, and prevent the waste hot water collecting tank from overflowing water or causing the waste hot water to flow back smoothly to cause system pressure boosting. Waste hot water collection tank water level is high, starts the water pump earlier, and the blowoff valve lasts to be opened 1 minute, will wash and still discharge at the interior impurity of filtration equipment, can prevent that the impurity that washs from blockking up the filter once more and preventing that impurity from getting into the following equipment, influence waste hot water quality of water.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A control method of a waste hot water collecting apparatus, comprising the steps of:
s1, when the waste hot water collecting tank is at a normal liquid level, starting the equipment, wherein the first water pump runs in a constant liquid level variable frequency mode, and the second water pump is not started;
s2, if the collection amount of waste hot water in the waste hot water collection tank is increased, the controller receives a liquid level signal of the liquid level sensor, when the liquid level in the waste hot water collection tank is increased to a first set liquid level, the controller sends a starting signal to the second water pump, and the second water pump operates according to power frequency;
s3, the controller receives an instant liquid level signal of the liquid level sensor, and when the liquid level in the waste hot water collection tank is lower than a second set liquid level, the controller sends a stop operation signal to the second water pump;
when the liquid level in the waste hot water collecting tank is lower than the ultralow liquid level, the controller sends a stop operation signal to the first water pump, and when the liquid level in the waste hot water collecting tank reaches the normal liquid level, the controller sends a starting signal to the first water pump.
2. The control method of a waste hot water collecting apparatus as set forth in claim 1, wherein the controller controls the first and second water pumps to be changed over to the one operation mode at intervals of a first set time according to an operation time of the water pumps.
3. The control method of a waste hot water collecting apparatus as set forth in claim 2, wherein the first set time is 2000 hours.
4. The method as claimed in claim 1, wherein the controller sends a control signal to an electric valve at the top of the waste hot water collection tank to control the opening of the electric valve when the pressure sensor in the waste hot water collection tank detects that the instantaneous pressure is greater than a first set value, the electric valve is controlled to open, the flash steam in the waste hot water collection tank enters the water inlet tank, and the controller sends a closing signal to the electric valve to control the electric valve to close when the pressure in the waste hot water collection tank drops to a second set value.
5. The method for controlling a waste hot water collecting apparatus according to claim 1, wherein after the waste hot water in the waste hot water collecting tank enters the filtering apparatus for filtering, the water quality index of the filtered waste hot water is monitored by an online water quality monitor, and the following control is performed:
if the water quality index of the waste hot water is lower than or equal to the set value, the controller controls a first outlet of a three-way electric valve connected with a water outlet of the filtering equipment to be opened, and the filtered waste hot water enters a water inlet tank and is directly utilized;
if the water quality index of the waste hot water is higher than the set value, the controller controls a second outlet of a three-way electric valve connected with the water outlet of the filtering equipment to be opened, and the filtered waste hot water is discharged into a heat exchange system for utilization.
6. The control method of the waste hot water collecting device according to claim 5, wherein when the filtering device needs to be cleaned, the controller judges whether the liquid level of the waste hot water tank is at a normal liquid level, if the liquid level of the waste hot water collecting tank is at the normal liquid level, the controller controls the first water pump or the second water pump to stop running, the controller controls the automatic cleaning program to start, and when the automatic cleaning program is finished, the controller controls the corresponding first water pump or the corresponding second water pump to start;
if the liquid level of the waste hot water collecting tank is higher than the normal liquid level, the controller controls the automatic cleaning program to be postponed, if the liquid level of the waste hot water collecting tank is reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be started, if the liquid level of the waste hot water collecting tank is not reduced to the normal liquid level within the second set time, the controller controls the automatic cleaning program to be not started within the cleaning period.
7. The method of claim 6, wherein the automatic washing process comprises the steps of closing both the inlet solenoid valve and the outlet solenoid valve of the filtering device, opening both the reverse washing inlet valve and the blowdown valve, closing the reverse washing inlet valve after a third set time of reverse washing, closing the blowdown valve after the blowdown valve continuously drains water for a fourth set time, opening the purge valve by the controller, closing the purge valve after a fifth set time of purging with compressed gas, opening the reverse washing inlet valve again, closing the reverse washing inlet valve and the blowdown valve sequentially after a sixth set time of reverse washing, and ending the automatic washing process.
8. The method as claimed in claim 7, wherein in the automatic cleaning process, if the liquid level in the waste hot water collecting tank reaches a first set liquid level, the controller stops the automatic cleaning process, closes both the reverse cleaning water inlet valve and the purge valve, opens the water inlet valve of the filtering device, controls the first water pump and the second water pump to start simultaneously, closes the blowdown valve after 1 minute, opens the water outlet valve of the filtering device, and makes the waste hot water collecting device enter a normal operation state.
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| CN202010815782.XA CN112028141A (en) | 2020-08-14 | 2020-08-14 | Control method of waste hot water collecting equipment |
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| CN202010815782.XA CN112028141A (en) | 2020-08-14 | 2020-08-14 | Control method of waste hot water collecting equipment |
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2020
- 2020-08-14 CN CN202010815782.XA patent/CN112028141A/en active Pending
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Application publication date: 20201204 |