CN106440569B - Multi-online cleaning method - Google Patents
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- 238000004140 cleaning Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003921 oil Substances 0.000 claims abstract description 158
- 238000002474 experimental method Methods 0.000 claims abstract description 26
- 239000010729 system oil Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000005057 refrigeration Methods 0.000 claims abstract description 5
- 239000012071 phase Substances 0.000 claims description 64
- 239000003507 refrigerant Substances 0.000 claims description 51
- 239000007791 liquid phase Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000010913 used oil Substances 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
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- 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
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/01—Heaters
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
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- 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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
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Abstract
The invention discloses a multi-online cleaning method, which comprises the following steps: (1) the oil quantity Q contained in the off-line experiment detection system and the time T required by the clean oil quantity Q are recorded in the experiment, and the time T = T/Q required by the clean unit oil quantity is calculated; (2) estimating a current system oil mass Q1, and calculating the time T1 required for cleaning the current system oil mass Q1 according to the time T = T/Q required by the unit oil mass, wherein T1= Q1 × T; (3) and the controller receives the cleaning command, performs the step of speed increasing and updating and filtering and controls the multi-split air conditioner to operate in the refrigeration mode. The multi-online cleaning method provided by the invention has the advantages that the online system does not need to be installed again, the multi-online machine can be controlled to complete cleaning in the operation process, the oil content of the system is calculated, the cleaning time can be accurately set, the waste of time and energy caused by overlong cleaning time for thorough cleaning can be avoided, and the used oil can be thoroughly cleaned.
Description
Technical Field
The invention belongs to the technical field of air conditioner cleaning, and particularly relates to a multi-split cleaning method.
Background
In about 2000 years, commercial multi-split air conditioners gradually enter the market for use, the technology of the commercial multi-split air conditioners is greatly upgraded from the initial single unit 8HP and 10HP to the current single unit 26HP from the fixed frequency to the full frequency, and the refrigerant is also updated from the R22 to the R410A system, and the first batch of multi-split air conditioners are obviously lagged behind in the aspects of performance, energy efficiency, unit reliability and the like after being used for ten years and enter the updating stage. If the common machine type is used for replacement, the built-in structure of the original building is damaged, a large number of waste piping parts are generated, the normal work of the existing owner is influenced, in addition, the disassembly and reinstallation of the refrigerant piping have huge engineering quantity, the construction period is long, the cost is high, and the investment is huge.
With the development of domestic economy, the living standard of people is improved, and more projects are provided for updating and modifying the old system, however, some refrigerating machine oil and impurities in the original system may be left in the piping of the old system, and the operation of the new R410A system is adversely affected. Although the existing piping can be cleaned by the automatic piping cleaning technology of the update machine systems of different manufacturers, in the actual application process, the amount of cleaning oil of the update system and the amount of oil existing in the old system are difficult to determine, so that the cleaning is difficult to complete.
Disclosure of Invention
The invention provides a multi-online cleaning method for solving the technical problems of high cost and incomplete cleaning of the existing multi-online cleaning, and can solve the problems.
In order to solve the technical problems, the invention adopts the following technical scheme:
a multi-online cleaning method comprises the following steps:
(1) the oil quantity Q contained in the off-line experiment detection system and the time T required by the clean oil quantity Q are recorded in the experiment, and the time T required by the clean unit oil quantity is calculated to be T/Q;
(2) estimating a current system oil mass Q1, and calculating the time T1 required for cleaning the current system oil mass Q1 according to the time T required by the unit oil mass, wherein T1 is Q1T;
(3) the controller receives a cleaning command, performs an acceleration updating filtering step, controls the multi-split air conditioner to operate in a refrigeration mode, and controls the fan to operate at a low wind speed, a liquid refrigerant and oil mixture enters the oil separator from an indoor unit air pipe, a heating device is arranged in the oil separator, an oil outlet is formed in the bottom of the oil separator, a refrigerant outlet is formed in the top of the oil separator, an inlet communicated with the indoor unit air pipe is further formed in the oil separator, the refrigerant outlet is communicated with the outdoor unit air pipe, after the liquid refrigerant and oil mixture enter the oil separator from the indoor unit air pipe, the heating device heats the liquid refrigerant, the liquid refrigerant is vaporized and is discharged from the refrigerant outlet, liquid oil is discharged from the oil outlet, and the continuous operation time of the acceleration updating filtering step is at least T35.
Further, the method for estimating the current system oil quantity Q1 in step (2) comprises the following steps: respectively estimating the oil content of the pipeline in the gas phase region of the current system, the oil content of the pipeline in the liquid phase region of the current system and the oil content of the evaporator in the gas-liquid two-phase region of the current system,
the current system oil mass Q1 is the oil content in the gas phase area pipeline of the current system + the oil content in the liquid phase area pipeline of the current system + the oil content in the gas-liquid two-phase area evaporator of the current system.
Further, the method for estimating the oil content of the pipeline in the gas phase region of the current system comprises the following steps:
the oil content Q11' per unit area of the gas phase section pipeline was detected by an off-line experiment: taking a section of tubing of a gas phase area pipeline, wherein the inner diameter of the section of tubing of the gas phase area pipeline is R1, the length of the tubing of the gas phase area pipeline is L1, and the weight of the tubing of the gas phase area pipeline is M1; then the sample is connected into a gas phase area pipeline for on-line experiment, and is removed after a period of time and weighed, wherein the weight is M2; the oil density in the system is rho; the oil content Q11' in the unit area of the gas phase area pipeline is calculated according to the following formula:
the oil content of the gas-phase area pipeline of the current system is 2 pi R3L 3Q 11', wherein R3 is the inner diameter of the gas-phase area pipeline of the current system, and L3 is the length of the gas-phase area pipeline of the current system.
Further, the method for estimating the oil content of the liquid phase region pipeline of the current system comprises the following steps:
the oil content Q12' in unit area of the liquid phase region pipeline is detected by an offline experiment: taking a section of tubing of the liquid phase region pipeline, wherein the inner diameter of the section of tubing of the liquid phase region pipeline is R2, the length of the section of tubing of the liquid phase region pipeline is L2, and the weight of the section of tubing of the liquid phase region pipeline is M3; then the sample is connected into a liquid phase region pipeline for on-line experiment, and is removed after a period of time and weighed, wherein the weight is M4; the oil density in the system is rho; the oil content Q12' in the unit area of the liquid phase region pipeline is calculated according to the following formula:
the oil content of the liquid phase region pipeline of the current system is 2 × pi × R4 × L4 × Q12', wherein R4 is the inner diameter of the liquid phase region pipeline of the current system, and L4 is the length of the liquid phase region pipeline of the current system.
Further, the method for estimating the oil content in the gas-liquid two-phase area evaporator of the current system comprises the following steps:
detecting the oil content Q13' in unit number of pieces of the gas-liquid two-phase evaporator by an off-line experiment, taking an internal machine with the number of pieces of X, and weighing the internal machine with the weight of M5 when the internal machine is not connected into a system; then the material is accessed into a system for online experiment, and is removed after a period of time and weighed, wherein the weight is M6; the oil density in the system is rho; the oil content Q3 in unit number of unit of the gas-liquid two-phase evaporator is calculated by the following formula:
the oil content of the gas-liquid two-phase region evaporator of the current system is Q13'. Y, wherein Y is the number of the indoor units of the current system.
Furthermore, the step of increasing the speed and updating the filtering also comprises the step of injecting new oil into the refrigerant circulation, when the heating device heats in the step (3), the new oil and the refrigerant are vaporized together, and the gas mixture of the new oil and the refrigerant is discharged from the refrigerant discharge port.
Furthermore, a filter is connected between the refrigerant discharge port and the outdoor unit air pipe and used for filtering impurities in the refrigerant.
Compared with the prior art, the invention has the advantages and positive effects that: the multi-online cleaning method provided by the invention has the advantages that the online system does not need to be installed again, the multi-online machine can be controlled to complete cleaning in the operation process, the oil content of the system is calculated, the cleaning time can be accurately set, the waste of time and energy caused by overlong cleaning time for thorough cleaning can be avoided, and the used oil can be thoroughly cleaned.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of an on-line cleaning method according to the present invention;
FIG. 2 is a schematic diagram of an oil separator according to an embodiment of the on-line cleaning method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment, this embodiment provides a multi-online cleaning method, as shown in fig. 1, including the following steps:
s1, detecting the oil quantity Q contained in the system through an offline experiment, recording the time T required by the oil quantity Q after cleaning through the experiment, and calculating the time T required by the cleaning unit oil quantity to be T/Q;
s2, estimating the current system oil mass Q1, and calculating the time T1 required for cleaning the current system oil mass Q1 according to the time T required by the unit oil mass, wherein T1 is Q1T;
the time t required by cleaning the oil mass of one unit is calculated through offline experimental detection, and because the flowing speed of a refrigerant in a pipeline is basically constant when the compressor is fixed at a certain frequency to operate, when other systems are updated and filtered, the time t required by cleaning the oil mass of one unit is calculated through offline experimental detection and is used as a reference, and the time required by cleaning the system to finish all the oil mass of the system can be obtained according to the actual oil mass of the system to be cleaned and the time t required by the oil mass of the unit.
In the step S1, the operation frequency of the air conditioner controlled when the time t required for checking the unit oil quantity under the line is consistent with the frequency when the multi-split air conditioner performs cleaning, so as to ensure that the flow speed of the refrigerant in the pipeline is consistent with the flow speed of the refrigerant when the test under the line is performed.
S3, the controller receives the cleaning command, carries out the step of speeding up and updating the filtration, controls the multi-split air conditioner to operate in the refrigeration mode, and the fan operates at low wind speed, at this time, the evaporator does not evaporate, the refrigerant in the air pipe of the indoor unit is liquid, the liquid refrigerant and oil mixture enter the oil separator from the air pipe of the indoor unit, as shown in figure 2, the oil separator is a schematic structural diagram of the oil separator, a heating device 12 is arranged in the oil separator 11, an oil outlet 13 is arranged at the bottom of the oil separator, a refrigerant outlet 14 is arranged at the top of the oil separator, an inlet 15 communicated with the air pipe of the indoor unit is further arranged on the oil separator, the refrigerant outlet 14 is communicated with the air pipe of the outdoor unit, after the liquid refrigerant and oil mixture enter the oil separator 11 from the air pipe of the indoor unit through the inlet 15, the, the time T1 required for discharging the current system oil amount Q1 has been calculated in step S2, and therefore, the speed-increasing updating filtering step is continued for at least T1 for the purpose of cleaning the oil thoroughly.
During the low wind operation of refrigeration, the liquid refrigerant and oil in the system pass through the oil separator, and under the condition that the heating device 12 accelerates the heating, the refrigerant and new oil in the system are gradually and completely separated from the old oil in the system.
The oil separator that filters oil and adopt in this embodiment through increasing heating device in the bottom, heats the inside refrigerant of oil content and oil and increases the refrigerant velocity of flow, makes the liquid refrigerant evaporation and takes away new oil and then filters the oil in the old system simultaneously, has increased the velocity of flow of refrigerant and new oil, does benefit to refrigerant and new oil gradually on the one hand and thoroughly separates with the old oil in the system, and on the other hand shortens the separation time, improves purification efficiency.
In the conventional system of the general indoor commercial air conditioner, where oil and foreign matters may exist, that is, in the high-pressure pipe, the low-pressure pipe and the indoor unit evaporator of the on-line pipe, they can be roughly divided into a gas phase region, a liquid phase region and a gas-liquid mixture region, and as a preferred embodiment, the method for estimating the current system oil amount Q1 in the step S2 is: respectively estimating the oil content of the pipeline in the gas phase region of the current system, the oil content of the pipeline in the liquid phase region of the current system and the oil content of the evaporator in the gas-liquid two-phase region of the current system,
the current system oil mass Q1 is the oil content in the gas phase area pipeline of the current system + the oil content in the liquid phase area pipeline of the current system + the oil content in the gas-liquid two-phase area evaporator of the current system. The sum of the oil amounts in the above three regions substantially corresponds to the oil amount of the entire system. Of course, it is not excluded that there is a certain error, which can be properly compensated for at the time of calculation.
Preferably, in this embodiment, the method for estimating the oil content in the pipeline in the gas phase region of the current system includes:
the oil content Q11' per unit area of the gas phase section pipeline was detected by an off-line experiment: taking a section of tubing of a gas phase zone pipeline, wherein the inner diameter of the section of tubing of the gas phase zone pipeline is R1, the length of the section of tubing of the gas phase zone pipeline is L1, and the weight of the tubing of the gas phase zone pipeline is M1 before the tubing of the gas phase zone pipeline is taken; then the pipe is connected into a gas-phase area pipeline for online experiment, the pipe is removed after running for a period of time and weighed, and the weight of a section of pipe of the gas-phase area pipeline is weighed to be M2; the oil density in the system is rho; the oil content Q11' in the unit area of the gas phase area pipeline is calculated according to the following formula:
therefore, the oil content of the current system gas phase area pipeline can be obtained by using the oil content Q11 'in the unit area of the gas phase area pipeline and the inner surface area of the current system gas phase area pipeline, and the inner surface area of the current system gas phase area pipeline can be calculated by using the inner diameter and the length (both known) of the pipeline, wherein the oil content of the current system gas phase area pipeline is 2 pi R3L 3Q 11', wherein R3 is the inner diameter of the current system gas phase area pipeline, and L3 is the length of the current system gas phase area pipeline.
Similarly, the method for estimating the oil content of the liquid phase region pipeline of the current system comprises the following steps:
the oil content Q12' in unit area of the liquid phase region pipeline is detected by an offline experiment: taking a section of tubing of the liquid phase region pipeline, wherein the inner diameter of the section of tubing of the liquid phase region pipeline is R2, the length of the section of tubing of the liquid phase region pipeline is L2, and the weight of the section of tubing of the liquid phase region pipeline is M3; then the sample is connected into a liquid phase region pipeline for on-line experiment, and after the sample is operated for a period of time, the sample is removed and weighed, wherein the weight of the sample is M4; it should be noted that when a section of the piping of the liquid phase region pipeline is removed and weighed after the system operates for a period of time, the refrigerant in the piping will become gaseous state at normal temperature and normal pressure and volatilize, and the weighing will not be affected, that is, the difference between M4 and M3 is the oil storage amount in the liquid phase region pipeline after the system operates for a period of time, and the oil density is rho; the oil content Q12' in the unit area of the liquid phase region pipeline is calculated according to the following formula:
the oil content of the liquid phase region pipeline of the current system is 2 × pi × R4 × L4 × Q12', wherein R4 is the inner diameter of the liquid phase region pipeline of the current system, and L4 is the length of the liquid phase region pipeline of the current system.
The evaporator is different from a method for calculating the oil quantity stored in a pipeline due to special structure, and in the embodiment, the method for estimating the oil quantity contained in the gas-liquid two-phase area evaporator of the current system comprises the following steps:
detecting the oil content Q13' in unit number of pieces of the gas-liquid two-phase evaporator by an off-line experiment, taking an internal machine with the number of pieces of X, and weighing the internal machine with the weight of M5 when the internal machine is not connected into a system; then the material is accessed into a system for online experiment, and is removed after a period of time and weighed, wherein the weight is M6; the oil density in the system is rho; the oil content Q3 in unit number of unit of the gas-liquid two-phase evaporator is calculated by the following formula:
the oil content of the gas-liquid two-phase region evaporator of the current system is Q13'. Y, wherein Y is the number of the indoor units of the current system.
Because the interior machine includes evaporimeter and other hardware structure, the position that probably has the long-pending oil is exactly the evaporimeter, consequently, around the multi-online operation, the hardware structure weight of interior machine can not change, what only leads to its weight to change is the long-pending oil at the evaporimeter when moving, consequently, through the weight change of the interior machine before and after the operation of weighing in this embodiment, and then can calculate the oil mass of long-pending in the evaporimeter, realize more easily, easy to operate.
In the step of speed-up filtering, since the old oil in the system is gradually filtered, in order to prevent the compressor from being damaged due to oil shortage in the system and shorten the service life of the compressor, the present embodiment further includes a step of injecting new oil into the refrigerant cycle, when the heating device heats in step S3, the new oil and the refrigerant are vaporized together, and the gas mixture of the new oil and the refrigerant is discharged from the refrigerant discharge port.
In order to filter out impurities in the refrigerant and prevent the impurities from entering the compressor to damage the compressor, as shown in fig. 2, a filter 16 is connected between the refrigerant discharge port 14 and the outdoor unit air pipe for filtering the impurities in the refrigerant.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A multi-online cleaning method is characterized by comprising the following steps:
(1) the oil quantity Q contained in the off-line experiment detection system and the time T required by the clean oil quantity Q are recorded in the experiment, and the time T = T/Q required by the clean unit oil quantity is calculated;
(2) estimating a current system oil mass Q1, and calculating the time T1 required for cleaning the current system oil mass Q1 according to the time T = T/Q required by the unit oil mass, wherein T1= Q1 × T;
(3) the controller receives a cleaning command, performs an acceleration updating filtering step, controls the multi-split air conditioner to operate in a refrigeration mode, and controls the fan to operate at a low wind speed, a liquid refrigerant and oil mixture enters the oil separator from an indoor unit air pipe, a heating device is arranged in the oil separator, an oil outlet is formed in the bottom of the oil separator, a refrigerant outlet is formed in the top of the oil separator, an inlet communicated with the indoor unit air pipe is further formed in the oil separator, the refrigerant outlet is communicated with the outdoor unit air pipe, after the liquid refrigerant and oil mixture enter the oil separator from the indoor unit air pipe, the heating device heats the liquid refrigerant, the liquid refrigerant is vaporized and is discharged from the refrigerant outlet, liquid oil is discharged from the oil outlet, and the continuous operation time of the acceleration updating filtering step is at least T35.
2. A multi-online cleaning method as claimed in claim 1, wherein the method for estimating the current system oil amount Q1 in step (2) comprises the following steps: respectively estimating the oil content of the pipeline in the gas phase region of the current system, the oil content of the pipeline in the liquid phase region of the current system and the oil content of the evaporator in the gas-liquid two-phase region of the current system,
the current system oil mass Q1= oil content in the gas phase area pipeline of the current system + oil content in the liquid phase area pipeline of the current system + oil content in the gas-liquid two-phase area evaporator of the current system.
3. The multi-online cleaning method as claimed in claim 2, wherein the method for estimating oil content in the gas phase zone pipeline of the current system comprises the following steps:
the oil content Q11' per unit area of the gas phase section pipeline was detected by an off-line experiment: taking a section of tubing of a gas phase area pipeline, wherein the inner diameter of the section of tubing of the gas phase area pipeline is R1, the length of the tubing of the gas phase area pipeline is L1, and the weight of the tubing of the gas phase area pipeline is M1; then the sample is connected into a gas phase area pipeline for on-line experiment, and is removed after a period of time and weighed, wherein the weight is M2; and the oil density in the system is rho, and the oil content Q11' in the unit area of the gas phase area pipeline is calculated according to the following formula:
oil content of gas phase area pipeline of current system =
Wherein R3 is the current system gas phase area pipelineInside diameter, L3 is the length of the current system gas phase section piping.
4. The multi-online cleaning method as claimed in claim 2, wherein the oil content estimation method of the liquid region pipeline of the current system is as follows:
the oil content Q12' in unit area of the liquid phase region pipeline is detected by an offline experiment: taking a section of tubing of the liquid phase region pipeline, wherein the inner diameter of the section of tubing of the liquid phase region pipeline is R2, the length of the section of tubing of the liquid phase region pipeline is L2, and the weight of the section of tubing of the liquid phase region pipeline is M3; then the sample is connected into a liquid phase region pipeline for on-line experiment, and is removed after a period of time and weighed, wherein the weight is M4; the oil density in the system is rho, and the oil content Q12' in unit area of the liquid phase region pipeline is calculated according to the following formula:
；
oil content of liquid phase region pipeline of current system =
Wherein, R4 is the inner diameter of the liquid phase region pipeline of the current system, and L4 is the length of the liquid phase region pipeline of the current system.
5. The multi-online cleaning method as claimed in claim 2, wherein the method for estimating the oil content in the gas-liquid two-phase evaporator of the current system comprises the following steps:
detecting the oil content Q13' in unit number of pieces of the gas-liquid two-phase evaporator by an off-line experiment, taking an internal machine with the number of pieces of X, and weighing the internal machine with the weight of M5 when the internal machine is not connected into a system; then the material is accessed into a system for online experiment, and is removed after a period of time and weighed, wherein the weight is M6; the oil density in the system is rho; the oil content Q3 in unit number of unit of the gas-liquid two-phase evaporator is calculated by the following formula:
oil content in gas-liquid two-phase region evaporator of current system =
And Y is the matching number of the indoor units of the current system.
6. A multi-on-line cleaning method as claimed in any one of claims 1 to 5, wherein the step of increasing the speed and refreshing the filtering further comprises the step of injecting new oil into the refrigerant cycle, and when the heating means performs heating in step (3), the new oil and the refrigerant are vaporized together, and the gas mixture of the new oil and the refrigerant is discharged from the refrigerant discharge port.
7. A multi-connected unit cleaning method as claimed in any one of claims 1 to 5, wherein a filter is further connected between the refrigerant discharge port and an outdoor unit air pipe for filtering impurities in the refrigerant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610845069.3A CN106440569B (en) | 2016-09-23 | 2016-09-23 | Multi-online cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610845069.3A CN106440569B (en) | 2016-09-23 | 2016-09-23 | Multi-online cleaning method |
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| CN108870633B (en) * | 2018-06-28 | 2019-10-25 | 珠海格力电器股份有限公司 | Control method and device of air conditioning system |
| CN109974193B (en) * | 2019-03-21 | 2021-04-09 | 广东美的制冷设备有限公司 | Control method of air conditioning system, server, terminal and medium |
| CN110410943B (en) * | 2019-07-23 | 2021-08-27 | 宁波奥克斯电气股份有限公司 | Oil return detection method and system and air conditioner |
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Effective date of registration: 20201113 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |