CN107477931B - Multi-line system and its indoor unit power down control method - Google Patents
Multi-line system and its indoor unit power down control method Download PDFInfo
- Publication number
- CN107477931B CN107477931B CN201710653012.8A CN201710653012A CN107477931B CN 107477931 B CN107477931 B CN 107477931B CN 201710653012 A CN201710653012 A CN 201710653012A CN 107477931 B CN107477931 B CN 107477931B
- Authority
- CN
- China
- Prior art keywords
- line system
- heat exchanger
- power down
- flow path
- heat exchange
- Prior art date
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/01—Timing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/15—Power, e.g. by voltage or current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A kind of multi-line system of the present invention and its indoor unit power down control method, the power down control method is the following steps are included: judge that power down occurs with the presence or absence of any one indoor unit in multiple indoor units；If there are any one indoor units, and power down occurs in multiple indoor units, multi-line system is controlled into interior machine powered-off fault mode；When multi-line system enters interior machine powered-off fault mode, compressor low-frequency operation is controlled, and the aperture of first throttle element is turned down to the first default aperture and/or tunes up the aperture of the second restricting element to the second default aperture, so that outdoor unit continues to run.Power down control method of the invention, can indoors machine powered-off fault when, the comfortable sexual experience of user, so that outdoor unit continues to run, is substantially increased to control the position of refrigerant in systems by the running frequency and the aperture of restricting element that control compressor.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to the indoor unit power down control method and one of a kind of multi-line system
Kind multi-line system.
Background technique
With the fast development of multi-connected machine, requirement of the user to comfort is higher and higher.In general, the power supply of each air-conditioning internal machine
It is independent control, therefore, machine often will appear by the abnormal power-down situation of short time in machine or whole in part, for example, with
Family needs to adjust electromechanical source line in, and perhaps technical staff needs total electricity of machine program or interior machine in burning part again
The electric expansion valve that machine in loosening problem or part occurs in source line needs resetting etc..And above-mentioned situation can make outer machine stop
Machine, and then cause the interior machine of whole system all out of service, so that the comfortable experience property of user is very poor.And machine power down in part
The interior uncertain problem of machine electric expansion valve state can be brought, if electric expansion valve is in the state opened, refrigerant can be straight
It connects and flows back to outdoor pusher side, cause to evaporate insufficient, lead to that system oil return is abnormal, compressor has liquid hammer risk.
To solve the above-mentioned problems, in the related technology, by increasing board number in outdoor unit junction chamber in dominant systems
Lock function, during system runs well, if there is interior machine power-down conditions and certain time, then entire unit will
It shuts down.Unit restarting needs the reliability process for undergoing prolonged self-test starting raising frequency therefore to break from shutting down to restoring
Comfortable effect before electricity needs the time more than half an hour, and the comfortable sexual experience of the user of this period is excessively poor.
In addition, in the related technology, it can also be by machine backup power source in increasing or accumulation of energy component to prevent interior machine powered-off fault
Situation, but this method higher cost are not the methods of multi-line system self-adaptive processing, and there are backup power sources and accumulation of energy group
The risk that part goes wrong.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of indoor unit power down control method of multi-line system, energy
When enough machine powered-off faults indoors, by controlling the running frequency of compressor and the aperture of restricting element, it is being to control refrigerant
Position in system substantially increases the comfortable sexual experience of user so that outdoor unit continues to run.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Third object of the present invention is to propose a kind of multi-line system.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of indoor unit power down control of multi-line system
Method processed, the multi-line system include outdoor unit, multiple indoor units and part flow arrangement, and the outdoor unit includes compressor, institute
Stating part flow arrangement includes gas-liquid separator, First Heat Exchanger, the second heat exchanger, first throttle element and the second restricting element, institute
The entrance for stating the first heat exchange flow path of First Heat Exchanger is connected with the gas-liquid separator, the first heat exchange of the First Heat Exchanger
The outlet of flow path is connected by the first entrance for exchanging heat flow path of the first throttle element and second heat exchanger, and described the
It is flowed by the second heat exchange of second restricting element and second heat exchanger outlet of first heat exchange flow path of two heat exchangers
The entrance on road is connected, the outlet of the second heat exchange flow path of second heat exchanger and the second heat exchange flow path of the First Heat Exchanger
Entrance be connected, the First Heat Exchanger second heat exchange flow path outlet be connected with the tracheae of the outdoor unit, the power down
Control method is the following steps are included: judge that power down occurs with the presence or absence of any one indoor unit in the multiple indoor unit；If
There are any one indoor units, and power down occurs in the multiple indoor unit, then controls the multi-line system and fall extremely into interior machine
Power mode；When the multi-line system enters the interior machine powered-off fault mode, the compressor low-frequency operation is controlled, and will
The aperture of the first throttle element is turned down to the first default aperture and/or tunes up the aperture of second restricting element to
Two default apertures, so that the outdoor unit continues to run.
The indoor unit power down control method of multi-line system according to an embodiment of the present invention, first judge be in multiple indoor units
It is no that there are any one indoor units, and power down occurs, if it is, multi-line system is controlled into interior machine powered-off fault mode, and
When multi-line system enters interior machine powered-off fault mode, compressor low-frequency operation is controlled, and by the aperture tune of first throttle element
As low as first default aperture and/or the aperture of the second restricting element is tuned up to the second default aperture, so that outdoor unit is after reforwarding
Row.As a result, this method can indoors machine powered-off fault when, pass through the control running frequency of compressor and opening for restricting element
Degree, to control the position of refrigerant in systems, so that outdoor unit continues to run, substantially increases the comfortable sexual experience of user.
In addition, the indoor unit power down control method of multi-line system according to the above embodiment of the present invention can also have as
Under additional technical characteristic:
According to one embodiment of present invention, the part flow arrangement further includes the first on-off valve, and first on-off valve is set
Set outlet in the first heat exchange flow path of second heat exchanger and the second of the First Heat Exchanger the heat exchange flow path outlet it
Between, wherein the multi-line system enter the interior machine powered-off fault mode when, also control first on-off valve be in open
Open state.
According to one embodiment of present invention, when the multi-line system enters the interior machine powered-off fault mode, also
Whether the indoor unit that power down occurs for real-time judge, which receives, re-powers signal, wherein connects in case of the indoor unit of power down
It receives and re-powers signal, then according to normal control logic to the compressor, the first throttle element, second throttling
Element and first on-off valve are controlled.
According to one embodiment of present invention, in case of there are indoor units not to receive on again in the indoor unit of power down
Electric signal, then judge the multi-line system enter the interior machine powered-off fault mode time whether be greater than first it is default when
Between, wherein if the time that the multi-line system enters the interior machine powered-off fault mode is greater than first preset time,
It is out of service then to control the outdoor unit.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter is stored thereon with computer program, which realizes the indoor unit power down of above-mentioned multi-line system when being executed by processor
Control method.
The non-transitorycomputer readable storage medium of the embodiment of the present invention, by the room for executing above-mentioned multi-line system
Interior machine power down control method, can indoors machine powered-off fault when, by the running frequency and restricting element that control compressor
Aperture, so that outdoor unit continues to run, substantially increases the comfortable sexual experience of user to control the position of refrigerant in systems.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of multi-line system, comprising: outdoor unit, institute
Stating outdoor unit includes compressor；Multiple indoor units；Part flow arrangement, the part flow arrangement include gas-liquid separator, First Heat Exchanger,
Second heat exchanger, first throttle element and the second restricting element, wherein the entrance of the first heat exchange flow path of the First Heat Exchanger
Be connected with the gas-liquid separator, the First Heat Exchanger first heat exchange flow path outlet by the first throttle element with
The entrance of first heat exchange flow path of second heat exchanger is connected, and the outlet of the first heat exchange flow path of second heat exchanger passes through
Second restricting element is connected with the entrance of the second heat exchange flow path of second heat exchanger, and the second of second heat exchanger
The outlet of heat exchange flow path is connected with the entrance of the second heat exchange flow path of the First Heat Exchanger, and the second of the First Heat Exchanger is changed
The outlet of hot flowpath is connected with the tracheae of the outdoor unit；Control module whether there is in the multiple indoor unit for judging
Power down occurs for any one indoor unit, when power down occurs there are any one indoor unit in judging the multiple indoor unit, control
The multi-line system is made into interior machine powered-off fault mode, and enters the interior machine powered-off fault mould in the multi-line system
When formula, control the compressor low-frequency operation, and the aperture of the first throttle element turned down to the first default aperture and/or
The aperture of second restricting element is tuned up to the second default aperture, so that the outdoor unit continues to run.
Multi-line system according to an embodiment of the present invention, there are any one rooms in judging multiple indoor units for control module
When power down occurs for interior machine, control multi-line system enters interior machine powered-off fault mode, and enters interior machine exception in multi-line system
When power-down mode, control compressor low-frequency operation, and the aperture of first throttle element is turned down to the first default aperture and/or incited somebody to action
The aperture of second restricting element is tuned up to the second default aperture, so that outdoor unit continues to run.The system can be indoors as a result,
When machine powered-off fault, by controlling the running frequency of compressor and the aperture of restricting element, to control the position of refrigerant in systems
It sets, so that outdoor unit continues to run, substantially increases the comfortable sexual experience of user.
In addition, multi-line system according to the above embodiment of the present invention can also have the following additional technical features:
According to one embodiment of present invention, the part flow arrangement further includes the first on-off valve, and first on-off valve is set
Set outlet in the first heat exchange flow path of second heat exchanger and the second of the First Heat Exchanger the heat exchange flow path outlet it
Between, wherein when the multi-line system enters the interior machine powered-off fault mode, the control module also controls described first
On-off valve is in the open state.
According to one embodiment of present invention, when the multi-line system enters the interior machine powered-off fault mode, institute
Whether the indoor unit for stating control module also real-time judge generation power down, which receives, re-powers signal, wherein in case of power down
Indoor unit receive and re-power signal, the control module is then according to normal control logic to the compressor, described
First throttle element, second restricting element and first on-off valve are controlled.
According to one embodiment of present invention, in case of there are indoor units not to receive on again in the indoor unit of power down
Electric signal, the control module then judge the multi-line system enter the interior machine powered-off fault mode time whether be greater than
First preset time, wherein if the time that the multi-line system enters the interior machine powered-off fault mode is greater than described the
One preset time, it is out of service that the control module then controls the outdoor unit.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multi-line system according to an embodiment of the invention；
Fig. 2 is the logic signal of the indoor unit power down control method of multi-line system according to an embodiment of the invention
Figure；And
Fig. 3 is the flow chart of the indoor unit power down control method of multi-line system according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The indoor unit power down controlling party of the multi-line system proposed according to embodiments of the present invention described with reference to the accompanying drawings
Method and multi-line system.
Fig. 1 is the structural schematic diagram of multi-line system according to an embodiment of the invention.As shown in Figure 1, the present invention is real
The multi-line system for applying example may include that outdoor unit 10, multiple indoor units 20, part flow arrangement 30 and control module (are not shown specifically in figure
Out).
Wherein, outdoor unit 10 may include compressor 11, oil eliminator 12, four-way valve 13, outdoor heat exchanger 14, solenoid valve
15A, 15B and 15C.The gas outlet of compressor 11 is connected with the first end of oil eliminator 12, the second end of oil eliminator 12 and four
The end A of port valve 13 is connected, and the end B of four-way valve 13 passes through three solenoid valve 15A, 15B and 15C in parallel and 14 phase of outdoor heat exchanger
Even, outdoor heat exchanger 14 is connected with the first end of the gas-liquid separator 31 in part flow arrangement 30.The third end of oil eliminator 12 with
The gas returning port of compressor 11 is connected.
Multiple indoor units 20 may include first to fourth indoor unit, wherein the first indoor unit 21 may include indoor heat exchanger
211 and restricting element 212, the second indoor unit 22 may include indoor heat exchanger 221 and restricting element 222, third indoor unit 23 can
Including indoor heat exchanger 231 and restricting element 232, machine 24 may include indoor heat exchanger 241 and restricting element 242 in fourth ventricle.
Part flow arrangement 30 may include gas-liquid separator 301, First Heat Exchanger 302, the second heat exchanger 303, first throttle member
Part 304, the second restricting element 305, refrigeration solenoid valve 307A, 307B, 307C and 307D, heating solenoid valve 308A, 308B, 308C
With 308D, heating check valve 309A, 309B, 309C and 309D, refrigeration check valve 310A, 310B, 310C and 310D.Gas-liquid separation
The second end of device 301 is connected with the entrance of the first heat exchange flow path of First Heat Exchanger 302, the first heat exchange of First Heat Exchanger 302
The outlet of flow path is connected by first throttle element 304 with the entrance of the first heat exchange flow path of the second heat exchanger 304, the second heat exchange
It is indoor that the entrance of first heat exchange flow path of device 304 also passes through heating check valve 309A, 309B, 309C and 309D and first to fourth
The other end of restricting element is connected in machine.The outlet of first heat exchange flow path of the second heat exchanger 303 passes through the second restricting element 305
It is connected with the entrance of the second heat exchange flow path of the second heat exchanger 303, the outlet on the first change of current road of the second heat exchanger 303 is also distinguished
It is connected by refrigeration check valve 310A, 310B, 310C with the other end of restricting element in first to fourth indoor unit of 310D.Second
The entrance of second heat exchange flow path of the outlet and First Heat Exchanger 302 of the second heat exchange flow path of heat exchanger 303 is connected, the first heat exchange
The outlet of second heat exchange flow path of device 302 passes through refrigeration solenoid valve 307A, 307B, 307C and 307D and first to fourth Room respectively
In interior machine indoor heat exchanger the other end be connected, First Heat Exchanger 302 second heat exchange flow path outlet also with outdoor unit 10
Tracheae is connected.The third end of gas-liquid separator 301 pass through respectively heating solenoid valve 308A, 308B, 308C and 308D and first to
The other end of restricting element is connected in machine in fourth ventricle.
Wherein, the first of the first heat exchange flow path of First Heat Exchanger 302, first throttle element 304 and the second heat exchanger 303
Heat exchange flow path constitutes the main road of part flow arrangement 30, the second restricting element 305, the second heat exchanger 303 the second heat exchange flow path and
Second heat exchange flow path of First Heat Exchanger 302 constitutes the cold loop excessively of part flow arrangement 30.
When multi-line system is run with pure refrigeration mode, the high pressure gaseous refrigerant come out from compressor 11 is by room
External heat exchanger 14 radiates, and the two phase refrigerant of high-pressure gas-liquid after heat dissipation enters gas-liquid separator 301, from gas-liquid separator
The 301 high temperature gas-liquid mixtures or pure liquid refrigerants come out, successively pass through First Heat Exchanger 302 and the second heat exchanger 303, then
Degree of supercooling is obtained in the exit of the first heat exchange flow path of the second heat exchanger 303, a part passed through cold loop absorption main road and puts
Heat out, eventually enters into the low-pressure air pipe of outdoor unit 10, and another part is entered in refrigeration by the restricting element of machine in freezing
Machine also enters the low-pressure air pipe of outdoor unit 10, eventually passes back to compressor 11 after heat absorption.
When multi-line system is run with main refrigeration mode, the high pressure gaseous refrigerant come out from compressor 11 is by room
External heat exchanger 14 radiates, and the two phase refrigerant of high-pressure gas-liquid after heat dissipation enters gas-liquid separator 301, from gas-liquid separator
The high temperature gas-liquid mixture entered from the high-voltage tube of outdoor unit 10 is separated into high pressure liquid and high pressure gas by 301, wherein high pressure liquid is logical
Cross the supercooling of First Heat Exchanger 302, high pressure gas then enters heat in machine, in heating after machine heat release, and from First Heat Exchanger 302
After the liquid refrigerants mixing that first heat exchange flow path comes out, into the second heat exchanger 303.From the first heat exchange of the second heat exchanger 303
Flow path come out refrigerant, a part passed through cold loop absorb main road release heat, finally with from freeze in machine come out it is cold
The low-pressure air pipe for entering outdoor unit 10 after matchmaker's mixing eventually passes back to compressor 11, the throttling member that another part passes through machine in freezing
Part enters machine in refrigeration, and the space freezed to needs is freezed.
When multi-line system is freezed and heated simultaneously, system complex, valve body is numerous, needs perfect control logic
It can guarantee that system is run.In part in the case where machine powered-off fault, the restricting element Status unknown for the interior machine that freezes, interior machine blower
It shuts down, this will lead to the liquid refrigerants in indoor heat exchanger and is unable to fully evaporate, so that liquid refrigerants returns to compression
The return-air degree of superheat of machine, compressor is very low, and leading to compressor, there are liquid hammer risks.
Therefore, in an embodiment of the present invention, combined using the perfect valve body of multi-line system, essence is carried out to these valve bodies
The position of refrigerant in systems under refinement control refrigeration mode, comes the case where indirect transition handles interior machine powered-off fault, guarantee portion
In point in machine or whole when machine power down, outer machine will not hard stop, improve the comfortable sexual experience of user.
How valve body is controlled to be discussed in detail below, in machine in guarantee section or whole when machine power down, outer machine
It will not hard stop.
In an embodiment of the present invention, control module is indoor with the presence or absence of any one in multiple indoor units 30 for judging
Power down occurs for machine, when power down occurs there are any one indoor unit in multiple indoor units 20, in control multi-line system entrance
Machine powered-off fault mode, and when multi-line system enters interior machine powered-off fault mode, 11 low-frequency operation of compressor is controlled, and will
The aperture of first throttle element 304 is turned down to the first default aperture and/or tunes up the aperture of the second restricting element 305 to second
Default aperture, so that outdoor unit 10 continues to run.Wherein, the first default aperture and the second default aperture can according to the actual situation into
Rower is fixed.
Specifically, control module controls more there are when any one indoor unit power down in detecting multiple indoor units 20
On-line system enters interior machine powered-off fault mode, and when multi-line system enters interior machine powered-off fault mode, controls compressor
11 frequency reducings immediately operation, to guarantee that refrigeration system high pressure does not increase, does not increase the propulsive force of refrigerant.Control module will divide simultaneously
The aperture of primary flow path valve body (first throttle element 304) in stream device 30 is turned down to compared with small guide vane (e.g., the first default aperture),
It allows high pressure refrigerant to stay in outdoor heat exchanger, high pressure refrigerant is delayed to enter the room heat exchanger, have progradation to liquid refrigerants；Or
Person tunes up the aperture of the supercooling circuit valve body (the second restricting element 305) in part flow arrangement 30 to the second default aperture, allow compared with
The refrigerant of big pressure is walked from bypass as far as possible, to reduce the high pressure refrigerant flow into interior machine；Or by first throttle element
While 304 aperture is turned down to the first default aperture, the aperture 305 of the second restricting element is tuned up to the second default aperture,
So that outdoor unit 10 continues to run.
Therefore, the multi-line system of the embodiment of the present invention, can machine power down indoors when, by compressor and shunt fill
Valve body in setting is controlled, and to control the position of refrigerant in systems, prevents a large amount of high-pressure liquid from entering the room heat exchanger,
Compressor liquid hammer is caused, meanwhile, extend the judgement time that outer machine is shut down, improves comfort.
Machine high-pressure liquid cold medium flux is entered the room in order to be further reduced, according to one embodiment of present invention, is shunted
Device 30 may also include the first on-off valve 306, and the first heat exchange flow path of the second heat exchanger 303 is arranged in the first on-off valve 306
Between the outlet of second heat exchange flow path of outlet and First Heat Exchanger 302, wherein enter interior machine powered-off fault in multi-line system
When mode, it is in the open state that control module also controls the first on-off valve 306.
That is, control module is to first throttle element when multi-line system enters interior machine powered-off fault mode
304 and second restricting element 305 while controlled, also controllable first on-off valve 306 is in the open state, so that larger
The refrigerant of pressure is walked from bypass, to be further reduced the high pressure refrigerant for the machine of entering the room.
Due to that can only delay and reduce the high-pressure liquid refrigerant for the machine of entering the room by above-mentioned control, cannot prevent completely
Refrigerant enters the room machine, therefore, can only extend the time that outdoor unit 10 shuts down judgement.
After multi-line system enters interior machine power-down mode in order to prevent, 10 long-time of outdoor unit is continued to run, so that excessively
Liquid refrigerants return in compressor 11, cause compressor liquid hit phenomenon occur, according to one embodiment of present invention, multi-joint
When machine system enters interior machine powered-off fault mode, whether the indoor unit that power down occurs for control module also real-time judge is received again
Power on signal, wherein receive in case of the indoor unit of power down and re-power signal, control module is then according to normal control
Logic controls compressor 11, first throttle element 304, the second restricting element 305 and the first on-off valve 306.
Further, it in case of in the indoor unit of power down, is not received there are indoor unit and re-powers signal, control mould
Block then judge multi-line system enter interior machine powered-off fault mode time whether be greater than the first preset time, wherein if more
The time that on-line system enters interior machine powered-off fault mode is greater than the first preset time, and control module then controls the stopping of outdoor unit 10
Operation.Wherein, the first preset time can be demarcated according to the actual situation.
Specifically, control module judgement enters interior machine powered-off fault when multi-line system enters powered-off fault mode
Whether the time T1 of mode is greater than the first preset time T, i.e. 11 low frequency duration of runs T1 of compressor, if in T time, i.e. T1
≤ T, the interior machine that power down occurs, which receives, re-powers signal, then according to normal logic control compressor 11, first throttle member
Part 304, the second restricting element 305 and the first on-off valve 306.If it exceeds time T, i.e. T1 > T, do not receive interior machine again yet
It is out of service then to control outdoor unit 10 for the signal powered on.
Fig. 2 is the logic signal of the indoor unit power down control method of multi-line system according to an embodiment of the invention
Figure.As shown in Fig. 2, into interior machine powered-off fault mode, entering interior machine powered-off fault when detecting indoor unit power-off signal
After mode, start timing T1, while compressor is downconverted to L grade, the aperture of first throttle element turns that (first in advance to F aperture down
If aperture), the aperture of the second restricting element is tuned up to M aperture (the second default aperture), and the first on-off valve is in the open state, such as
Fruit T1≤T then restores to original state；If T1 > T, outdoor unit shutdown is controlled.
In conclusion multi-line system according to an embodiment of the present invention, control module exists in judging multiple indoor units
When power down occurs for any one indoor unit, control module controls multi-line system and enters interior machine powered-off fault mode, and multi-joint
Machine system enter interior machine powered-off fault mode when, control compressor low-frequency operation, and by the aperture of first throttle element turn down to
First default aperture and/or the aperture of the second restricting element is tuned up to the second default aperture, so that outdoor unit continues to run.By
This, the system can indoors machine powered-off fault when, by control compressor running frequency and restricting element aperture, to control
The position of refrigeration matchmaker in systems substantially increases the comfortable sexual experience of user so that outdoor unit continues to run.
Fig. 3 is the flow chart of the indoor unit power down control method of multi-line system according to an embodiment of the present invention.
In an embodiment of the present invention, multi-line system may include outdoor unit, multiple indoor units and part flow arrangement wherein, room
Outer machine may include compressor, and part flow arrangement may include gas-liquid separator, First Heat Exchanger, the second heat exchanger, first throttle element
It is connected with the entrance of the second restricting element, the first heat exchange flow path of First Heat Exchanger with gas-liquid separator, the of First Heat Exchanger
The outlet of one heat exchange flow path is connected by first throttle element with the entrance of the first heat exchange flow path of the second heat exchanger, the second heat exchange
First heat exchange outflux of device is connected by the second restricting element with the entrance of the second heat exchange flow path of the second heat exchanger, and second changes
The entrance of second heat exchange flow path of the outlet and First Heat Exchanger of the second heat exchange flow path of hot device is connected, and the second of First Heat Exchanger
The outlet of heat exchange flow path is connected with the tracheae of outdoor unit.
As shown in figure 3, the indoor unit power down control method of the multi-line system of the embodiment of the present invention can comprise the following steps that
S1 judges that power down occurs with the presence or absence of any one indoor unit in multiple indoor units.
S2 is controlled in multi-line system entrance if there are any one indoor units, and power down occurs in multiple indoor units
Machine powered-off fault mode.
S3 controls compressor low-frequency operation, and by first throttle when multi-line system enters interior machine powered-off fault mode
The aperture of element is turned down to the first default aperture and/or tunes up the aperture of the second restricting element to the second default aperture, so that
Outdoor unit continues to run.
According to one embodiment of present invention, part flow arrangement may also include the first on-off valve, and the setting of the first on-off valve is the
Between the outlet of second heat exchange flow path of the outlet and First Heat Exchanger of the first heat exchange flow path of two heat exchangers, wherein multi-joint
When machine system enters interior machine powered-off fault mode, it is in the open state also to control the first on-off valve.
According to one embodiment of present invention, when multi-line system enters interior machine powered-off fault mode, real-time judge is gone back
Whether the indoor unit that power down occurs, which receives, re-powers signal, wherein receives again in case of the indoor unit of power down
Power on signal then carries out compressor, first throttle element, the second restricting element and the first on-off valve according to normal control logic
Control.
According to one embodiment of present invention, in case of there are indoor units not to receive on again in the indoor unit of power down
Electric signal, then judge multi-line system enter interior machine powered-off fault mode time whether be greater than the first preset time, wherein such as
The time that fruit multi-line system enters interior machine powered-off fault mode is greater than the first preset time, then it is out of service to control outdoor unit.
Wherein, the first preset time can be demarcated according to the actual situation.
It should be noted that undisclosed thin in the indoor unit power down control method of the multi-line system of the embodiment of the present invention
Section, please refers to details disclosed in the multi-line system of the embodiment of the present invention, specifically repeats no more.
The indoor unit power down control method of multi-line system according to an embodiment of the present invention, first judge be in multiple indoor units
It is no that there are any one indoor units, and power down occurs, if it is, multi-line system is controlled into interior machine powered-off fault mode, and
When multi-line system enters interior machine powered-off fault mode, compressor low-frequency operation is controlled, and by the aperture tune of first throttle element
As low as first default aperture and/or the aperture of the second restricting element is tuned up to the second default aperture, so that outdoor unit is after reforwarding
Row.As a result, this method can indoors machine powered-off fault when, pass through the control running frequency of compressor and opening for restricting element
Degree, to control the position of refrigerant in systems, so that outdoor unit continues to run, substantially increases the comfortable sexual experience of user.
In addition, the embodiment of the present invention also proposed a kind of non-transitorycomputer readable storage medium, it is stored thereon with
Computer program, the program realize the indoor unit power down control method of above-mentioned multi-line system when being executed by processor.
The non-transitorycomputer readable storage medium of the embodiment of the present invention, by the room for executing above-mentioned multi-line system
Interior machine power down control method, can indoors machine powered-off fault when, by the running frequency and restricting element that control compressor
Aperture, so that outdoor unit continues to run, substantially increases the comfortable sexual experience of user to control the position of refrigerant in systems.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In addition, in the description of the present invention, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ",
"upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ", " inverse time
The orientation or positional relationship of the instructions such as needle ", " axial direction ", " radial direction ", " circumferential direction " is to be based on the orientation or positional relationship shown in the drawings,
Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of indoor unit power down control method of multi-line system, which is characterized in that the multi-line system include outdoor unit,
Multiple indoor units and part flow arrangement, the outdoor unit include compressor, and the part flow arrangement includes gas-liquid separator, the first heat exchange
Device, the second heat exchanger, first throttle element and the second restricting element, the First Heat Exchanger first heat exchange flow path entrance with
The gas-liquid separator is connected, and the outlet of the first heat exchange flow path of the First Heat Exchanger passes through the first throttle element and institute
The entrance for stating the first heat exchange flow path of the second heat exchanger is connected, and the outlet of the first heat exchange flow path of second heat exchanger passes through institute
It states the second restricting element to be connected with the entrance of the second heat exchange flow path of second heat exchanger, the second of second heat exchanger is changed
The outlet of hot flowpath is connected with the entrance of the second heat exchange flow path of the First Heat Exchanger, the second heat exchange of the First Heat Exchanger
The outlet of flow path is connected with the tracheae of the outdoor unit, the power down control method the following steps are included:
Judge that power down occurs with the presence or absence of any one indoor unit in the multiple indoor unit；
If there are any one indoor units, and power down occurs in the multiple indoor unit, control in the multi-line system entrance
Machine powered-off fault mode；
When the multi-line system enters the interior machine powered-off fault mode, the compressor low-frequency operation is controlled, and by institute
The aperture for stating first throttle element is turned down to the first default aperture and/or tunes up the aperture of second restricting element to second
Default aperture, so that the outdoor unit continues to run.
2. the indoor unit power down control method of multi-line system as described in claim 1, which is characterized in that the part flow arrangement
Further include the first on-off valve, first on-off valve be arranged in second heat exchanger first heat exchange flow path outlet with it is described
Between the outlet of second heat exchange flow path of First Heat Exchanger, wherein enter the interior machine powered-off fault in the multi-line system
When mode, it is in the open state also to control first on-off valve.
3. the indoor unit power down control method of multi-line system as claimed in claim 2, which is characterized in that in the multi-connected machine
When system enters the interior machine powered-off fault mode, whether the indoor unit that also power down occurs for real-time judge, which receives, re-powers letter
Number, wherein
Receive in case of the indoor unit of power down and re-power signal, then according to normal control logic to the compressor,
The first throttle element, second restricting element and first on-off valve are controlled.
4. the indoor unit power down control method of multi-line system as claimed in claim 3, which is characterized in that in case of power down
Indoor unit in do not received there are indoor unit and re-power signal, then it is abnormal to judge that the multi-line system enters the interior machine
Whether the time of power-down mode is greater than the first preset time, wherein
If the time that the multi-line system enters the interior machine powered-off fault mode is greater than first preset time, control
It is out of service to make the outdoor unit.
5. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt
The indoor unit power down control method such as multi-line system of any of claims 1-4 is realized when processor executes.
6. a kind of multi-line system characterized by comprising
Outdoor unit, the outdoor unit include compressor；
Multiple indoor units；
Part flow arrangement, the part flow arrangement include gas-liquid separator, First Heat Exchanger, the second heat exchanger, first throttle element and
Second restricting element, wherein the entrance of the first heat exchange flow path of the First Heat Exchanger is connected with the gas-liquid separator, described
The first heat exchange that the outlet of first heat exchange flow path of First Heat Exchanger passes through the first throttle element and second heat exchanger
The entrance of flow path is connected, and the outlet of the first heat exchange flow path of second heat exchanger passes through second restricting element and described the
The entrance of second heat exchange flow path of two heat exchangers is connected, the outlet and described first of the second heat exchange flow path of second heat exchanger
The entrance of second heat exchange flow path of heat exchanger is connected, the outlet of the second heat exchange flow path of the First Heat Exchanger and the outdoor unit
Tracheae be connected；
With the presence or absence of any one indoor unit power down occurs for control module in the multiple indoor unit for judging, judging
It states in multiple indoor units there are when the generation power down of any one indoor unit, controls the multi-line system into interior machine powered-off fault
Mode, and when the multi-line system enters the interior machine powered-off fault mode, the compressor low-frequency operation is controlled, and will
The aperture of the first throttle element is turned down to the first default aperture and/or tunes up the aperture of second restricting element to
Two default apertures, so that the outdoor unit continues to run.
7. multi-line system as claimed in claim 6, which is characterized in that the part flow arrangement further includes the first on-off valve, institute
The outlet for stating the first heat exchange flow path that second heat exchanger is arranged in the first on-off valve is changed with the second of the First Heat Exchanger
Between the outlet of hot flowpath, wherein when the multi-line system enters the interior machine powered-off fault mode, the control module
It is in the open state also to control first on-off valve.
8. multi-line system as claimed in claim 7, which is characterized in that it is abnormal to enter the interior machine in the multi-line system
When power-down mode, whether the indoor unit that power down occurs for the control module also real-time judge, which receives, re-powers signal, wherein
It receives in case of the indoor unit of power down and re-powers signal, the control module is then according to normal control logic pair
The compressor, the first throttle element, second restricting element and first on-off valve are controlled.
9. multi-line system as claimed in claim 7, which is characterized in that in case of there are indoor units in the indoor unit of power down
It does not receive and re-powers signal, the control module then judges that the multi-line system enters the interior machine powered-off fault mode
Time whether be greater than the first preset time, wherein
If the time that the multi-line system enters the interior machine powered-off fault mode is greater than first preset time, described
It is out of service that control module then controls the outdoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653012.8A CN107477931B (en) | 2017-08-02 | 2017-08-02 | Multi-line system and its indoor unit power down control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653012.8A CN107477931B (en) | 2017-08-02 | 2017-08-02 | Multi-line system and its indoor unit power down control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107477931A CN107477931A (en) | 2017-12-15 |
| CN107477931B true CN107477931B (en) | 2019-12-03 |
Family
ID=60597021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710653012.8A Active CN107477931B (en) | 2017-08-02 | 2017-08-02 | Multi-line system and its indoor unit power down control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107477931B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507118B (en) * | 2018-03-09 | 2020-08-14 | 珠海格力电器股份有限公司 | Power supply method and device of multi-split air conditioning system, external unit and internal unit |
| CN109579349A (en) * | 2018-12-05 | 2019-04-05 | 南京天加环境科技有限公司 | A kind of multi-line system and its control method reliable for operation |
| CN110687475A (en) * | 2019-11-18 | 2020-01-14 | 珠海格力电器股份有限公司 | Remote fault diagnosis circuit, detection method and multi-split air conditioning unit |
| CN113091220B (en) * | 2021-03-08 | 2022-04-01 | 珠海格力电器股份有限公司 | Multi-split system and power consumption determination method and device thereof, storage medium and processor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248235A (en) * | 1998-03-06 | 1999-09-14 | Sanyo Electric Co Ltd | Air conditioning system |
| JP2004239537A (en) * | 2003-02-07 | 2004-08-26 | Fujitsu General Ltd | Control method of multiple room type air conditioner |
| KR20080070239A (en) * | 2007-01-25 | 2008-07-30 | 삼성전자주식회사 | A multi-air conditioner system and driving method thereof |
| CN104110747A (en) * | 2013-10-22 | 2014-10-22 | 广东美的制冷设备有限公司 | Split-type air conditioner and starting control method and system of outdoor power source thereof |
| CN106123117A (en) * | 2016-06-29 | 2016-11-16 | 青岛海尔空调电子有限公司 | A kind of air conditioning unit and control method of multi-connected machine |
| CN106403142A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔空调电子有限公司 | Abnormal power-off protection method of VRV air-conditioning system indoor unit |
| CN106642602A (en) * | 2016-10-26 | 2017-05-10 | 珠海格力电器股份有限公司 | Multi-linked air conditioner system and detection control method and detection control device thereof |
-
2017
- 2017-08-02 CN CN201710653012.8A patent/CN107477931B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248235A (en) * | 1998-03-06 | 1999-09-14 | Sanyo Electric Co Ltd | Air conditioning system |
| JP2004239537A (en) * | 2003-02-07 | 2004-08-26 | Fujitsu General Ltd | Control method of multiple room type air conditioner |
| KR20080070239A (en) * | 2007-01-25 | 2008-07-30 | 삼성전자주식회사 | A multi-air conditioner system and driving method thereof |
| CN104110747A (en) * | 2013-10-22 | 2014-10-22 | 广东美的制冷设备有限公司 | Split-type air conditioner and starting control method and system of outdoor power source thereof |
| CN106403142A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔空调电子有限公司 | Abnormal power-off protection method of VRV air-conditioning system indoor unit |
| CN106123117A (en) * | 2016-06-29 | 2016-11-16 | 青岛海尔空调电子有限公司 | A kind of air conditioning unit and control method of multi-connected machine |
| CN106642602A (en) * | 2016-10-26 | 2017-05-10 | 珠海格力电器股份有限公司 | Multi-linked air conditioner system and detection control method and detection control device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107477931A (en) | 2017-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107477931B (en) | Multi-line system and its indoor unit power down control method | |
| US9506674B2 (en) | Air conditioner including a bypass pipeline for a defrosting operation | |
| KR101666428B1 (en) | Refrigerator and operation control method thereof | |
| US20070033962A1 (en) | Refrigerator and control method thereof | |
| CN109945330B (en) | Refrigerating system capable of continuously heating and defrosting control method | |
| JP6319334B2 (en) | Refrigeration equipment | |
| CN106403081B (en) | Multi-connected machine and its control method | |
| CN102645057A (en) | Oil returning method during heating of multi-split air-conditioning unit | |
| WO2020161803A1 (en) | Outdoor unit of refrigeration device and refrigeration device comprising same | |
| CN109945389A (en) | Control method, device and the air conditioner of air conditioner | |
| KR20180011413A (en) | Air conditining system for vehicle and its control method | |
| US7475557B2 (en) | Refrigerator | |
| CN107238161A (en) | Multiple on-line system and its mode switch control method | |
| KR100712196B1 (en) | Heat pump system and a method for eliminating frost on the outdoor heat exchanger of the heat pump system | |
| CN102331121A (en) | Air conditioner and control method thereof | |
| CN107401848B (en) | Multi-line system and its indoor unit power down control method | |
| CN109612026A (en) | Outdoor unit, air conditioner and its Defrost method | |
| CN103388881A (en) | Heat pump and air-conditioning system as well as control method thereof | |
| WO2015083392A1 (en) | Heat pump device | |
| WO2015198751A1 (en) | Heat pump type chiller | |
| CN109373529A (en) | Air conditioner and its control method | |
| CN110411066B (en) | Oil cooling system of water chilling unit and control method thereof | |
| CN110986440B (en) | Thermal fluorine defrosting device, air conditioning unit and defrosting control method | |
| CN106288544A (en) | Air-conditioner and control method thereof | |
| CN115366936A (en) | Air conditioning system for railway vehicle, control method of air conditioning system and railway vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |