CN105588281B - Reheating mode under-fluorine control method for reheating dehumidification multi-split air conditioning system - Google Patents
Reheating mode under-fluorine control method for reheating dehumidification multi-split air conditioning system Download PDFInfo
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- CN105588281B CN105588281B CN201511005472.7A CN201511005472A CN105588281B CN 105588281 B CN105588281 B CN 105588281B CN 201511005472 A CN201511005472 A CN 201511005472A CN 105588281 B CN105588281 B CN 105588281B
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- Prior art keywords
- machine
- expansion valve
- fluorine
- control method
- heat exchanger
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- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 73
- 239000011737 fluorine Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007791 dehumidification Methods 0.000 title claims abstract description 26
- 238000003303 reheating Methods 0.000 title abstract description 8
- 238000004378 air conditioning Methods 0.000 title abstract description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims abstract description 9
- 230000002950 deficient Effects 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 4
- 230000007812 deficiency Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a reheating mode under-fluorine control method of a reheating dehumidification multi-split air-conditioning system, wherein the system comprises an outer machine and a plurality of inner machines, each inner machine comprises an inner machine first heat exchanger, an inner machine second heat exchanger, a first expansion valve connected to a pipeline of the inner machine first heat exchanger and a second expansion valve connected to a pipeline of the inner machine second heat exchanger, and the outer machine comprises an outer machine expansion valve connected to a pipeline of the outer machine heat exchanger; wherein the control method comprises the following steps: and detecting a first difference value between the actual superheat degree of the first heat exchanger of the started inner machine and a target superheat degree and a second difference value between the outlet pipe temperature of the outer machine gas-liquid separator and the refrigerant saturation temperature value corresponding to the low-pressure side pressure value, and judging whether the system is under-fluorinated or not according to the results of the first difference value and the second difference value. The reheating mode fluorine deficiency control method enables the reheating dehumidification multi-split air conditioner system to accurately judge whether fluorine deficiency exists or not, and therefore a foundation is laid for timely quitting of a fluorine deficiency state.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to a kind of reheat dehumidification multi-line system deficient fluorine control of heat pattern again
Method.
Background technology
In multi-line system, unit can automatic decision whether owe fluorine, if the action of deficient fluorine can also be executed automatically by owing fluorine, to move back
Go out deficient fluorine state.And for reheat dehumidification system, such as three control reheat dehumidification systems, when system operation is under heat pattern again
When, fluorine control method is owed there are no effective in the prior art, that is, whether owing fluorine firstly for system, is lacked in the prior art
Few effective judgment method.And for being in the system for owing fluorine state, it is used to exit the control of deficient fluorine state in the prior art
Effect is also not good mode (i.e. it is owed fluorine and executes action) for reheat dehumidification system.
Therefore, to solve the problems, such as that occurring owing fluorine under multi-joint unit reheating pattern cannot judge and further owe
Fluorine cannot execute the problem of effective action, and it is very necessary to propose that a kind of new heat pattern again owes fluorine control method.
Invention content
The main purpose of the present invention is to provide a kind of reheat dehumidification multi-line system, heat pattern owes fluorine control method again,
It can overcome the problems, such as that system cannot effectively judge to owe fluorine under reheat dehumidification pattern in the prior art.
Above-mentioned purpose is achieved through the following technical solutions：
Heat pattern owes fluorine control method again for a kind of reheat dehumidification multi-line system, and the system comprises outer machines and a plurality of interior
Machine, it is each in machine include interior machine First Heat Exchanger, the second heat exchanger of interior machine, be connected on interior machine First Heat Exchanger pipeline first
Expansion valve and the second expansion valve for being connected to the second Tube Sheet of Heat Exchanger of interior machine road, the outer machine include being connected to outer machine heat exchange
Outer machine expansion valve on device pipeline；Wherein, the control method includes owing fluorine judgment step：The first heat exchange of interior machine has been opened in detection
The practical degree of superheat of device and the first difference of target superheat degree, and outer machine gas-liquid separator outlet pipe temperature and low-pressure lateral pressure value
Second difference of corresponding refrigerant saturation temperature value, and according to the first difference and the second difference as a result, judging whether system owes
Fluorine.
Preferably, if more than half opened interior machine first difference be more than the first setting value, and the second difference be more than etc.
In the second setting value, then it is assumed that system owes fluorine.
Preferably, first setting value is within the scope of 1~4 DEG C, and second setting value is within the scope of 2~5 DEG C.
Preferably, after deficient fluorine judgment step, if it is considered to system owes fluorine, the control method further includes exiting deficient fluorine
The step of state：Adjust the aperture of the second expansion valve and outer machine expansion valve of not opening interior machine.
Preferably, the second expansion valve of interior machine is not opened in adjusting and the mode of the aperture of outer machine expansion valve includes：It is not opening
Each cycle opens step determining greatly on the basis of original aperture of second expansion valve of interior machine and original aperture of outer machine expansion valve
Number.
Preferably, the step number of the determination is 10~30 steps.
Preferably, after exiting deficient fluorine state, the control method executes conventional control step.
Preferably, in the step of exiting deficient fluorine state, do not open the second expansion valve of interior machine, opened interior machine second expansion
The aperture of valve and outer machine expansion valve is held in determining range.
The heat pattern again of the present invention owes fluorine control method and whether reheat dehumidification multi-line system accurate judgement is owed
Fluorine, to lay the foundation to owe exiting in time for fluorine state.Further, deficient fluorine action is exited in control method of the invention
The step of can more reasonably execute the action of deficient fluorine, it is ensured that system exits deficient fluorine state in time.In addition, the control method of the present invention
It enables a system to run in normal parameters, to ensure the moisture removal and reliability of unit.The controlling party of the present invention
Method is simple, system run all right.
Description of the drawings
Hereinafter reference will be made to the drawings, and to a kind of reheat dehumidification multi-line system according to the present invention, heat pattern owes fluorine controlling party again
The preferred embodiment of method is described.In figure：
Fig. 1 is the schematic diagram of reheat dehumidification system according to the present invention.
Specific implementation mode
Fig. 1 schematically illustrates the schematic diagram of reheat dehumidification system according to the present invention.
Typically, which includes outer machine (it includes compressor, outer machine heat exchanger 9) and a plurality of interior machines 7.Wherein, often
A interior machine 7 include interior machine First Heat Exchanger 3, the second heat exchanger of interior machine 4, be connected on interior 3 pipeline of machine First Heat Exchanger first
Expansion valve (preferably electric expansion valve) 5 and the second expansion valve (preferably electronics being connected on 4 pipeline of the second heat exchanger of interior machine
Expansion valve) 6.As shown, interior machine First Heat Exchanger 3 and the second heat exchanger of interior machine 4, which are arranged to the former, is located at the upper of air-out direction
Trip, the latter is located at the downstream of air-out direction, so that room air first passes through interior machine First Heat Exchanger 3, then using interior machine the
Two heat exchangers 4 and be blown out.
In addition, the system further includes that the first four-way valve 8 and the outer machine expansion valve being connected on 9 pipeline of outer machine heat exchanger are (excellent
Select electric expansion valve) 1, wherein the first four-way valve 8 is heated or is freezed for controlling outer machine, namely for connect compressor,
Outer machine heat exchanger and interior machine First Heat Exchanger, that is, common multi-line system (do not have the multi-joint of reheat dehumidification function
Machine system) in execution conventional func four-way valve.
Compared with common multi-line system, reheat dehumidification system of the invention increase one by outer machine to each interior machine into
The height air pipe of row heating, while interior machine the second heat exchanger 4 and the second expansion valve 6 are increased in each interior machine, the increased height of institute
The second four-way valve 2 is provided in low-pressure air pipe, for connect compressor and the second heat exchanger of interior machine 4, the second heat exchanger of interior machine 4
By the common adjusting of the second four-way valve 2 and the second expansion valve 6, it can be achieved that refrigeration and heating.In reheat dehumidification, room air
It first passes through interior machine First Heat Exchanger 3 and carries out refrigerated dehumidification, heated using the second heat exchanger of interior machine 4, to realize reheating
Dehumidifying.
In addition, the system further includes being connected to the gas-liquid separator at suction port of compressor end and being connected to compressor outlet
The oil eliminator at end.
When air-conditioner set runs on normal mode, to make unit switch to reheat dehumidification pattern, the first four-way can be made
The power-off of valve 8 (at this time its keep shown in figure conducting relationship), the second four-way valve 2 power on that (it is by interior machine that relationship, which is connected, in it at this time
Second heat exchanger 4 is connected with the outlet end of oil eliminator), then, the outlet end (namely outlet end of compressor) of oil eliminator
Two-way is divided to be respectively connected to outer machine heat exchanger 9 and the second heat exchanger of interior machine 4, that is, high temperature and pressure refrigerant flows separately through the two, makes
The two heats simultaneously, and two parts refrigerant is converged after flowing separately through the second expansion valve 6 of outer machine expansion valve 1 and interior machine again later
It closes, using interior machine First Heat Exchanger 3 is entered after the first expansion valve 5 of interior machine, is allowed to freeze.Then, air first passes through interior machine
First Heat Exchanger 3 dehumidifies, and heats up using the second heat exchanger of interior machine 4, just realizes the purpose of reheat dehumidification.
Outer machine expansion valve 1 reaches certain step number (aperture), the second expansion of interior machine from maximum step number (maximum opening) toward small
Valve 6 opens to the maximum step number (maximum opening), the temperature in the 6 co- controlling room of the second expansion valve of outer machine expansion valve 1 and interior machine, wet
Degree.
On the basis of above system, the present invention proposes a kind of reheat dehumidification multi-line system deficient fluorine control of heat pattern again
Method comprising owe fluorine judgment step：The of the practical degree of superheat and the target superheat degree of the First Heat Exchanger 3 of interior machine has been opened in detection
One difference (that is, the practical degree of superheat-target superheat degree of First Heat Exchanger 3=first difference), and detect outer machine gas-liquid separator
Second difference of outlet pipe temperature refrigerant saturation temperature value corresponding with low-pressure lateral pressure value is (that is, outer machine gas-liquid separator goes out tube temperature
The difference of the corresponding refrigerant saturation temperature value of degree-low-pressure lateral pressure value=second), and according to the knot of the first difference and the second difference
Fruit, judges whether system owes fluorine.
Wherein, to detect outer machine gas-liquid separator outlet pipe temperature, the present invention is provided with outer machine gas-liquid on gas-liquid separator
Separator outlet pipe temperature sensing package.
Preferably, if the first difference that most of (such as more than half) has opened interior machine is more than the first setting value, and the
Two differences are more than or equal to the second setting value, then it is assumed that system owes fluorine.
Preferably, first setting value is within the scope of 1~4 DEG C, and second setting value is within the scope of 2~5 DEG C.
Preferably, owing fluorine judgment step should carry out after unit starting reheat dehumidification runs a period of time.
Preferably, the first difference and the second difference are detected within continuous a period of time as a result, that is, if continuous
A period of time detects that most of (such as more than half) has opened the first difference of interior machine more than the first setting value, and second is poor
Value is more than or equal to the second setting value, then it is assumed that system owes fluorine.For example, within continuous a period of time, can according to set time between
It is multiple every detection, to obtain reliable and stable result.
After judging that system owes fluorine, unit can perform necessary the step of exiting deficient fluorine state namely deficient fluorine is executed and moved
Make, for example, deficient fluorine in the prior art executes action.Although the deficient fluorine execution action of the prior art is for reheat dehumidification system
Less effective, but the control method based on the present invention is to owing the accurate judgement of fluorine state, control effect generally still better than
The control method of the prior art.
Further, the present invention show that, when system owes fluorine, a unit refrigerant part is gathered in for above system analysis
Do not open in the second heat exchanger 4 of interior machine, another part because outer 1 aperture of machine expansion valve beat it is small due to be present in outer machine heat exchanger (condensation
Device) in 9, the aperture of the expansion valve 6 and outer machine expansion valve 1 of not opening interior machine is adjusted at this time, so that this two parts refrigerant enters work
It recycles.
It is therefore preferred that after deficient fluorine judgment step, if it is considered to system owes fluorine, the control method of the invention
Further include the step of preferred deficient fluorine proposed by the invention executes action, that is, exits deficient fluorine state：Adjusting does not open the second of interior machine
The aperture of expansion valve and outer machine expansion valve.
Preferably, the second expansion valve of interior machine is not opened in adjusting and the mode of the aperture of outer machine expansion valve includes：It is not opening
Each cycle opens step determining greatly on the basis of original aperture of second expansion valve of interior machine and original aperture of outer machine expansion valve
Number.
Preferably, the step number of the determination is 10~30 steps.
Above-mentioned adjusting action is executable until exiting deficient fluorine state.After exiting deficient fluorine state, the control method
Recovery automatically controls, that is, executing conventional control step.
In the step of exiting deficient fluorine state, to ensure the comfort of other interior machines, the second expansion valve, of interior machine is not opened
The aperture of the second expansion valve and outer machine expansion valve of opening interior machine is held in certain range.
The heat pattern again of the present invention owes fluorine control method and whether reheat dehumidification multi-line system accurate judgement is owed
Fluorine, to lay the foundation to owe exiting in time for fluorine state.Further, deficient fluorine action is exited in control method of the invention
The step of can more reasonably execute the action of deficient fluorine, it is ensured that system exits deficient fluorine state in time.In addition, the control method of the present invention
It enables a system to run in normal parameters, to ensure the moisture removal and reliability of unit.The controlling party of the present invention
Method is simple, system run all right.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each preferred embodiment can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from the basic of the present invention
In the case of principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details be made
It changes, is all included in scope of the presently claimed invention.
Claims (9)
1. heat pattern owes fluorine control method to a kind of reheat dehumidification multi-line system again, the system comprises outer machines and a plurality of interior
Machine, it is each in machine include interior machine First Heat Exchanger, the second heat exchanger of interior machine, be connected on interior machine First Heat Exchanger pipeline first
Expansion valve and the second expansion valve for being connected to the second Tube Sheet of Heat Exchanger of interior machine road, the outer machine include being connected to outer machine heat exchange
Outer machine expansion valve on device pipeline；It is characterized in that, further include the height air pipe heated to each interior machine by outer machine, it is described
The second four-way valve is provided in height air pipe, for connect compressor and second heat exchanger of interior machine；The controlling party
Method includes owing fluorine judgment step：It is first poor to have opened the practical degree of superheat and the target superheat degree of the First Heat Exchanger of interior machine for detection
Value, and outer machine gas-liquid separator outlet pipe temperature refrigerant saturation temperature value corresponding with low-pressure lateral pressure value the second difference, and
According to the first difference and the second difference as a result, judging whether system owes fluorine.
2. control method according to claim 1, which is characterized in that if more than half first difference for having opened interior machine is more than
First setting value, and the second difference is more than or equal to the second setting value, then it is assumed that and system owes fluorine.
3. control method according to claim 2, which is characterized in that first setting value is within the scope of 1~4 DEG C, institute
The second setting value is stated within the scope of 2~5 DEG C.
4. according to the control method described in one of claim 1-3, which is characterized in that after deficient fluorine judgment step, if recognized
Fluorine is owed for system, the control method further includes the steps that exiting deficient fluorine state：Adjust do not open interior machine the second expansion valve and
The aperture of outer machine expansion valve.
5. control method according to claim 4, which is characterized in that the second expansion valve of interior machine and outer machine are not opened in adjusting
The mode of the aperture of expansion valve includes：It is opened in the original aperture for the second expansion valve for not opening interior machine and outer the original of machine expansion valve
Each cycle opens step number determining greatly on the basis of degree.
6. control method according to claim 5, which is characterized in that the step number of the determination is 10~30 steps.
7. control method according to claim 4, which is characterized in that after exiting deficient fluorine state, the control method is held
Row conventional control step.
8. control method according to claim 4, which is characterized in that in the step of exiting deficient fluorine state, do not open interior machine
The second expansion valve, the second expansion valve and outer machine expansion valve of having opened interior machine aperture be held in determining range.
9. according to the control method described in one of claim 5-7, which is characterized in that in the step of exiting deficient fluorine state, not
Open the second expansion valve of interior machine, the aperture of the second expansion valve and outer machine expansion valve of having opened interior machine is held in determining model
In enclosing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005472.7A CN105588281B (en) | 2015-12-25 | 2015-12-25 | Reheating mode under-fluorine control method for reheating dehumidification multi-split air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005472.7A CN105588281B (en) | 2015-12-25 | 2015-12-25 | Reheating mode under-fluorine control method for reheating dehumidification multi-split air conditioning system |
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| Publication Number | Publication Date |
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| CN105588281A CN105588281A (en) | 2016-05-18 |
| CN105588281B true CN105588281B (en) | 2018-09-18 |
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| CN201511005472.7A Active CN105588281B (en) | 2015-12-25 | 2015-12-25 | Reheating mode under-fluorine control method for reheating dehumidification multi-split air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500668A (en) * | 2019-08-14 | 2019-11-26 | 珠海格力电器股份有限公司 | Mode switching device of three-pipe multi-split air conditioner, air conditioning system and control method of air conditioning system |
| CN110657489B (en) * | 2019-10-25 | 2021-04-13 | 南京天加环境科技有限公司 | Improved dehumidification reheating system and control method thereof |
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| CN1469084A (en) * | 2002-06-12 | 2004-01-21 | Lg������ʽ���� | Multi-type air conditioner and its operating method |
| KR20100064144A (en) * | 2008-12-04 | 2010-06-14 | 엘지전자 주식회사 | Multi-type air conditioner and control method of the same |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104807229A (en) * | 2015-04-27 | 2015-07-29 | 广东美的暖通设备有限公司 | Multi-split air conditioner and control method thereof |
| CN104990229A (en) * | 2015-07-28 | 2015-10-21 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
-
2015
- 2015-12-25 CN CN201511005472.7A patent/CN105588281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469084A (en) * | 2002-06-12 | 2004-01-21 | Lg������ʽ���� | Multi-type air conditioner and its operating method |
| KR20100064144A (en) * | 2008-12-04 | 2010-06-14 | 엘지전자 주식회사 | Multi-type air conditioner and control method of the same |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104807229A (en) * | 2015-04-27 | 2015-07-29 | 广东美的暖通设备有限公司 | Multi-split air conditioner and control method thereof |
| CN104990229A (en) * | 2015-07-28 | 2015-10-21 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
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| CN105588281A (en) | 2016-05-18 |
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