CN104482630B - Air conditioner fluorine deficiency protection method and device and air conditioner - Google Patents
Air conditioner fluorine deficiency protection method and device and air conditioner Download PDFInfo
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- CN104482630B CN104482630B CN201410796446.XA CN201410796446A CN104482630B CN 104482630 B CN104482630 B CN 104482630B CN 201410796446 A CN201410796446 A CN 201410796446A CN 104482630 B CN104482630 B CN 104482630B
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 45
- 239000011737 fluorine Substances 0.000 title claims abstract description 45
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title abstract description 38
- 230000007812 deficiency Effects 0.000 title abstract 2
- 239000003507 refrigerant Substances 0.000 claims abstract description 82
- 230000008859 change Effects 0.000 claims abstract description 30
- 230000004907 flux Effects 0.000 claims description 36
- 239000011159 matrix material Substances 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 7
- 238000010025 steaming Methods 0.000 claims 1
- 238000013507 mapping Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008717 functional decline Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- 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 method and a device for protecting an air conditioner against fluorine deficiency and an air conditionermAcquiring a normal mass flow Q corresponding to the current operating condition by inquiring a mapping relation table between the normal mass flow and the operating condition which is established in advance; then by mixing qmComparing with the normal mass flow Q to detect whether the refrigerant leaks; and based on said qmQ calculating the rate of change of the mass flow of the refrigerantη, detecting the leakage degree of the refrigerant by the value of η, when η is larger than the preset threshold, indicating that the refrigerant leaks more, and reaching the preset fluorine-lacking protection limit, at the moment, the method of the invention sends out the shutdown protection instruction in time to perform shutdown protection on the air conditioner.
Description
Technical field
The invention belongs to the detection of air conditioner, control technology field, more particularly to a kind of lack of fluorine of air-conditioners guard method, device
And air conditioner.
Background technology
Air conditioner causes its system the phenomenon that refrigerant is slowly leaked occur often because of many reasons, for example, air-conditioning
During installation, connecting tube and internal-external machine adapter position seals are poor, or connecting tube it is through walls when there is bending and split leakage, can all cause refrigeration
Agent is slowly leaked；In addition, if system pipeline is in adverse circumstances, pipeline is also easily leaked after long-term corrosion so that
Refrigerant amount in system is gradually decreased.
Slow refrigerant leakage phenomenon is more hidden, and difficulty or ease are found.If however, can not find leakage phenomenon simultaneously in time
Corresponding safeguard measure is taken, then Performance for Air Conditioning Systems can be caused to decline, while can also aggravate the abrasion of compressor, when serious even
Compressor can be damaged.
The content of the invention
In view of this, it is an object of the invention to provide a kind of lack of fluorine of air-conditioners guard method, device and air conditioner, to realize
Leakage situation to refrigerant is detected, and carries out protection control in time when refrigerant leakage is more, it is to avoid system occur
Hydraulic performance decline and the phenomenon for damaging compressor.
Therefore, the present invention is disclosed directly below technical scheme：
A kind of lack of fluorine of air-conditioners guard method, including：
When meeting default testing conditions, current refrigerant mass fluxes q in real time is obtainedm, while according to pre-establishing
Normal mass flow and operating condition between corresponding relation, obtain the normal mass flow Q corresponding to current operating condition；
In the current refrigerant mass fluxes q in real timemDuring less than the normal mass flow Q, preset formula is utilized
To the normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, obtain the mass flow of refrigerant
Rate of change η；
Judge whether the mass-flow change rate η is more than predetermined threshold value；
If the determination result is YES, then stoppage protection instruction is sent, stoppage protection is carried out to air conditioner to realize.
The above method, it is preferred that the current refrigerant mass fluxes q in real time of the acquisitionmIncluding：
Compensation temperature Δ t is obtained, and obtains current compressor air suction temperature t in real timeInhale, at first U pipe of evaporator
Temperature tEvaporator, compressor volume flow qV；
To the current compressor air suction temperature t in real timeInhale, temperature t at first U pipe of evaporatorEvaporatorAnd compensation temperature
Δ t processing is spent, current compressor air suction specific volume ν in real time is obtainedInhale；
Utilize formula qm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
The above method, it is preferred that if the compressor of air conditioner is to determine frequency machine, the compressor volume flow qVFor air-conditioning
The steady state value pre-entered in system；If the compressor of air conditioner is frequency changer, the compressor volume flow qVValue be qV
=f × Vp, wherein：
F represents the operating frequency of compressor, VpRepresent the swept volume of compressor.
The above method, it is preferred that under refrigeration mode, tEvaporator=tC evaporators；Under heating mode, tEvaporator=tH evaporators, wherein：
tC evaporatorsRepresent that indoor heat exchanger is used as temperature during evaporator at first U pipe, tH evaporatorsRepresent that outdoor heat exchanger is made
Temperature during for evaporator at first U pipe.
The above method, it is preferred that normal mass flow and the corresponding relation of operating condition that the foundation is pre-established, is obtained
The normal mass flow Q corresponding to current operating condition is taken, including：
From the mass flow matrix table pre-established, inquire and current indoor environment temperature tin, outdoor environment temperature
Spend toutCorresponding normal mass flow Q, wherein, the mass flow matrix table have recorded indoor and outdoor environment temperature and normal
Corresponding relation between mass flow.
The above method, it is preferred that the utilization preset formula is to the normal mass flow Q and current refrigerant in real time
Mass flow qmCalculated, obtaining the mass-flow change rate η of refrigerant includes：
Using formula η=| qm- Q |/Q*100% calculates the mass-flow change rate η of refrigerant.
The above method, it is preferred that the testing conditions are any one in following condition：
Preset duration Δ T is run after air conditioner start, or,
On the premise of air conditioner continuous service, when after last round of lack of fluorine of air-conditioners guard method execution terminates by Δ T
It is long.
The above method, it is preferred that also include：
If Δ qm>=0, then shutdown control instruction is not sent, air conditioner is continued to run with, and is continued to run with air conditioner pre-
If during duration Δ T, triggering the lack of fluorine of air-conditioners guard method；
If Δ qm<0, and η is not more than the predetermined threshold value, then does not send shutdown control instruction, continue to run with air conditioner,
And when air conditioner continues to run with preset duration Δ T, the lack of fluorine of air-conditioners guard method is triggered, wherein, Δ qm=qm- Q, η=|
Δqm|/Q0* 100%.
A kind of lack of fluorine of air-conditioners protection device, including：
Acquisition module, for when meeting default testing conditions, obtaining current refrigerant mass fluxes q in real timem, together
When according to the corresponding relation between the normal mass flow that pre-establishes and operating condition, obtain corresponding to current operating condition
Normal mass flow Q；
Computing module, in the current refrigerant mass fluxes q in real timemDuring less than the normal mass flow Q,
Using preset formula to the normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, freezed
The mass-flow change rate η of agent；
Judge module, for judging whether the mass-flow change rate η is more than predetermined threshold value；
Control module, during for being in judged result, sending stoppage protection instruction, air conditioner is shut down with realizing
Protection.
Said apparatus, it is preferred that the acquisition module includes first acquisition unit and second acquisition unit, wherein, it is described
First acquisition unit includes：
Subelement is obtained, for obtaining compensation temperature Δ t, and current compressor air suction temperature t in real time is obtainedInhale, steam
Send out the temperature t at first U pipe of deviceEvaporator, compressor volume flow qV；
Subelement is handled, for the current compressor air suction temperature t in real timeInhale, temperature at first U pipe of evaporator
Spend tEvaporatorAnd compensation temperature Δ t processing, obtain current compressor air suction specific volume ν in real timeInhale；
Computation subunit, for utilizing formula qm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
Said apparatus, it is preferred that the second acquisition unit includes：
Subelement is inquired about, for from the mass flow matrix table pre-established, inquiring and current indoor environment temperature
Spend tin, outdoor environment temperature toutCorresponding normal mass flow Q, wherein, the mass flow matrix table have recorded it is indoor,
Corresponding relation between external environment temperature and normal mass flow.
Said apparatus, it is preferred that the computing module includes：
Rate of change computing unit, for using formula η=| qm- Q |/Q*100% calculates the mass-flow change rate of refrigerant
η。
Said apparatus, it is preferred that also include：
First trigger module, in Δ qmWhen >=0, shutdown control instruction is not sent, air conditioner is continued to run with, and
When air conditioner continues to run with preset duration Δ t, the lack of fluorine of air-conditioners guard method is triggered；
Second trigger module, in Δ qm<0, and η is when being not more than the predetermined threshold value, and shutdown control instruction is not sent,
Air conditioner is continued to run with, and when air conditioner continues to run with preset duration Δ t, triggers the lack of fluorine of air-conditioners guard method, its
In, Δ qm=qm- Q, η=| Δ qm|/Q0* 100%.
A kind of air conditioner, including above-described lack of fluorine of air-conditioners protection device.
From above scheme, the present invention is when meeting default testing conditions, and detection air-conditioner system is currently real-time
Refrigerant mass fluxes qm, and by inquiring about the mapping table between the normal mass flow pre-established and operating condition, obtain
Take the normal mass flow Q corresponding to current operating condition；Afterwards by by qmCompared with the normal mass flow Q
Compared with to detect whether refrigerant leaks；And based on the qm, Q calculate refrigerant mass-flow change rate η, pass through η's
Numerical values recited detects the leakiness of refrigerant, when η is more than predetermined threshold value, characterizes refrigerant and leaks more, reaches default
Lack fluorine protection boundary, now the inventive method sends stoppage protection instruction in time, and stoppage protection is carried out to controller.It can be seen that, this
Invention can carry out effective detection to refrigerant leakage phenomenon, and can carry out stoppage protection in time when refrigerant leakage is more, keep away
The generation that systematic function declines and damages such phenomenons such as compressor is exempted from.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of flow chart of lack of fluorine of air-conditioners guard method disclosed in the embodiment of the present invention one；
Fig. 2 is another flow chart of lack of fluorine of air-conditioners guard method disclosed in the embodiment of the present invention two；
Fig. 3 is a kind of structural representation of lack of fluorine of air-conditioners protection device disclosed in the embodiment of the present invention three；
Fig. 4 is another structural representation of lack of fluorine of air-conditioners protection device disclosed in the embodiment of the present invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
The present embodiment one discloses a kind of lack of fluorine of air-conditioners guard method, and methods described is simultaneously suitable in determining frequency unit and change
Frequency unit carries out lacking fluorine protection, and with reference to Fig. 1, methods described may comprise steps of：
S101：When meeting default testing conditions, current refrigerant mass fluxes q in real time is obtainedm, while according to advance
Corresponding relation between the normal mass flow and operating condition of formulation, obtains the normal quality stream corresponding to current operating condition
Measure Q.
Wherein, the testing conditions are specially operation preset duration Δ T after air conditioner start, or, are persistently transported in air conditioner
On the premise of row, by Δ T durations after last round of lack of fluorine of air-conditioners guard method execution terminates.I.e. the present embodiment is specifically using fixed
When cycle detection mode, in air conditioner running, at interval of certain time be triggering the present invention processing logic to determining frequency
Unit or frequency converter sets carry out lacking fluorine detection, lack fluorine protection.
When meeting one testing conditions of any of the above, this step obtains current refrigerant in real time by following processing procedure
Mass flow qm：
1) compensation temperature Δ t is obtained, and obtains current compressor air suction temperature t in real timeInhale, first U of evaporator pipes
The temperature t at placeEvaporator, compressor volume flow qV；
2) to the current compressor air suction temperature t in real timeInhale, temperature t at first U pipe of evaporatorEvaporatorAnd compensation
Temperature Δ t processing, obtains current compressor air suction specific volume ν in real timeInhale；
3) formula q is utilizedm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
Specifically, refrigerant mass fluxes qmCalculating and compressor volume flow qV, compressor air suction specific volume νInhaleIt is relevant,
That is qm=qV/νInhale, unit is kg/s.
For invariable frequency compressor, its compressor volume flow qV(unit m3/ s) it is invariable, during installation, in system in advance
It has input compressor volume flow qVNumerical value, therefore,, can be directly to being for invariable frequency compressor during using the inventive method
The compressor volume flow number pre-entered in system is read out.
For frequency changer, its compressor volume flow qV=f × Vp, wherein, f represents compressor operation frequency, and unit is
Hz；VpCompressor operating volume is represented, unit is m3.Compressor operating volume V is have input during installation, in system in advancepNumber
Value, so that, during using the inventive method, for frequency-changeable compressor, the compressor operating that should be pre-entered first in reading system
Volume VpNumerical value, and simultaneously detect compressor operating frequency f, V is utilized afterwardspAnd f calculates the compressor volume flow of frequency converter sets
Measure qV。
In order to obtain compressor air suction specific volume (unit：m3/ kg), the present invention is in advance in compressor air suction mouthful, indoor heat exchange
Temperature-sensitive bag is respectively arranged at first U pipe of device and at first U pipe of outdoor heat exchanger, for carrying out corresponding temperature inspection
Survey, the temperature that three temperature-sensitive bags are detected is expressed as tInhale, tC evaporators、tH evaporators.Wherein, under refrigeration mode, indoor heat exchanger is made
For evaporator, so that, temperature is equal to temperature at first U pipe of indoor heat exchanger at first U pipe of evaporator under the pattern,
That is tEvaporator=tC evaporators；Under heating mode, outdoor heat exchanger as evaporator so that, under this pattern evaporator first U pipe
Locate temperature and be equal to temperature, i.e. t at first U pipe of outdoor heat exchangerEvaporator=tH evaporators。
When detecting compressor air suction temperature tInhale, temperature t at first U pipe of evaporatorEvaporatorAfterwards, the present invention is to tEvaporatorDo temperature
Degree compensation, calculates saturation temperature t ' at compressor air suction mouthfulInhale=tEvaporator+ Δ t, and then obtain corresponding saturation under the saturation temperature
Pressure pInhale, wherein Δ t is compensation temperature, unit DEG C；
On this basis, by tInhale、pInhaleObtain compressor air suction specific volume νInhale。
So as to finally using the compressor volume flow q of acquisitionVAnd compressor air suction specific volume νInhaleCalculate current real-time
Refrigerant mass fluxes qm：qm=qV/νInhale, as seen from the above description, compressor is q when determining frequency unitVFor steady state value, compression
When machine is frequency converter sets, qV=f × Vp, so that, qm=Vp×f/νInhale。
Meanwhile, the present invention is also previously according to indoor and outdoor environment temperature tin、toutFormulate mass flow matrix table.Wherein, will
Outdoor temperature is as abscissa, and by outdoor environment temperature toutIt is divided into n region：t1~t2For the 1st region, t2~t3For
2nd region, t3~t4For the 3rd region ... ..., tn~tn+1For n-th of region；Using indoor temperature as ordinate, and will
Indoor environment temperature tinIt is divided into m region：t′1~t '2For the 1st region, t '2~t '3For the 2nd region, t '3~t '4For
3rd region ... ..., t 'm~t 'm+1For m-th of region；It is as shown in the table, subsequently, the reality of indoor and outdoor environment temperature can be combined
Border operating mode inquires about the normal refrigerant mass fluxes Q of system corresponding to it.
Table 1
Step S101 of the present invention is obtaining current refrigerant mass fluxes q in real timemWhile, always according to what is detected
Current indoor, external environment temperature tin、toutThe normal quality corresponding to current working is read from the mass flow matrix table of table 1
Flow Q.
S102：In the current refrigerant mass fluxes q in real timemDuring less than normal mass flow Q, preset formula is utilized
To the normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, obtain the mass flow of refrigerant
Rate of change η.
Normal mass flow Q corresponding to the current working that this step reads step S101 passes through as reference data
To currently real-time refrigerant mass fluxes qmIt is compared with the normal mass flow Q, to detect whether refrigerant occurs
Leakage.Wherein, if Δ qm=qm- Q ＜ 0, i.e., described current refrigerant mass fluxes q in real timemLess than normal mass flow Q, then
Sign there occurs refrigerant leakage phenomenon.
Now, this step continue using formula η=| qm- Q |/Q*100% calculates the mass-flow change rate η of refrigerant, with η
Numerical values recited detect the leakiness of refrigerant, η values are bigger, characterize refrigerant leakage rate more.
S103：Judge whether the mass-flow change rate η is more than predetermined threshold value.
S104：If the determination result is YES, then stoppage protection instruction is sent, stoppage protection is carried out to air conditioner to realize.
When leakage rate reaches default scarce fluorine protection boundary, i.e. during η ＞ A, display lacks fluorine protection failure code and entered in time
Row stoppage protection.
Wherein, A is the predetermined threshold value, and the leakage of its embodiments system refrigerant reaches system when need to carry out stoppage protection
Cryogen mass-flow change accounts for the empirical value of refrigerant mass fluxes proportion under normal circumstances.
From above scheme, the present invention is when meeting default testing conditions, and detection air-conditioner system is currently real-time
Refrigerant mass fluxes qm, and by inquiring about the mapping table between the normal mass flow pre-established and operating condition, obtain
Take the normal mass flow Q corresponding to current operating condition；Afterwards by by qmCompared with the normal mass flow Q
Compared with to detect whether refrigerant leaks；And based on the qm, Q calculate refrigerant mass-flow change rate η, pass through η's
Numerical values recited detects the leakiness of refrigerant, when η is more than predetermined threshold value, characterizes refrigerant and leaks more, reaches default
Lack fluorine protection boundary, now the inventive method sends stoppage protection instruction in time, and stoppage protection is carried out to controller.It can be seen that, this
Invention can carry out effective detection to refrigerant leakage phenomenon, and can carry out stoppage protection in time when refrigerant leakage is more, keep away
The generation that systematic function declines and damages such phenomenons such as compressor is exempted from.
Embodiment two
In the present embodiment two, with reference to Fig. 2, methods described can also comprise the following steps：
S105：If Δ qm>=0, then shutdown control instruction is not sent, air conditioner is continued to run with, and continues fortune in air conditioner
During row preset duration Δ T, the lack of fluorine of air-conditioners guard method is triggered.
S106：If Δ qm<0, and η is not more than the predetermined threshold value, then does not send shutdown control instruction, continue air conditioner
Operation, and when air conditioner continues to run with preset duration Δ T, the lack of fluorine of air-conditioners guard method is triggered, wherein, Δ qm=qm- Q,
η=| Δ qm|/Q0* 100%.
I.e. specifically, if Δ qm>=0, then characterize and refrigerant leakage phenomenon does not occur, without carrying out stoppage protection, so that this
When can continue to run with air conditioner, and when continuing to run with Δ T durations, the processing procedure for lacking fluorine guard method is triggered again, it is real
Cycle detection now is carried out to refrigerant leakage situation.
If Δ qm<0 and η≤A, then characterize refrigerant and leak, but not up to need to carry out the degree of stoppage protection, so that
Air conditioner can be continued to run with, and equally continue to run with Δ T2During duration, trigger lack fluorine guard method progress circulation inspection again
Survey.
Embodiment three
The present embodiment three discloses a kind of lack of fluorine of air-conditioners protection device, described device with disclosed in embodiment one and embodiment two
Lack of fluorine of air-conditioners guard method is corresponding.
First, corresponding to embodiment one, with reference to Fig. 3, described device includes acquisition module 100, computing module 200, judged
Module 300 and control module 400.
Acquisition module 100, for when meeting default testing conditions, obtaining current refrigerant mass fluxes in real time
qm, while according to the corresponding relation between the normal mass flow and operating condition pre-established, obtaining current operating condition institute
Corresponding normal mass flow Q.
Wherein, the acquisition module 100 includes first acquisition unit and second acquisition unit.
First acquisition unit includes obtaining subelement, processing subelement and computation subunit, wherein：
Subelement is obtained, for obtaining compensation temperature Δ t, and current compressor air suction temperature t in real time is obtainedInhale, steam
Send out the temperature t at first U pipe of deviceEvaporator, compressor volume flow qV；
Subelement is handled, for the current compressor air suction temperature t in real timeInhale, temperature at first U pipe of evaporator
Spend tEvaporatorAnd compensation temperature Δ t processing, obtain current compressor air suction specific volume ν in real timeInhale；
Computation subunit, for utilizing formula qm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
Second acquisition unit includes inquiry subelement, and the unit is used for from the mass flow matrix table pre-established, looked into
Ask out and current indoor environment temperature tin, outdoor environment temperature toutCorresponding normal mass flow Q, wherein, the quality
Traffic matrix table have recorded corresponding relation between indoor and outdoor environment temperature and normal mass flow.
Computing module 200, in the current refrigerant mass fluxes q in real timemLess than the normal mass flow Q
When, using preset formula to the normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, made
The mass-flow change rate η of cryogen.
The computing module 200 includes rate of change computing unit, the unit be used for using formula η=| qm- Q |/Q*100% is counted
Calculate the mass-flow change rate η of refrigerant.
Judge module 300, for judging whether the mass-flow change rate η is more than predetermined threshold value.
Control module 400, during for being in judged result, sending stoppage protection instruction, air conditioner is carried out with realizing
Stoppage protection.
Corresponding to embodiment two, with reference to Fig. 4, described device also includes the first trigger module 500 and the second trigger module
600, wherein：
First trigger module, in Δ qmWhen >=0, shutdown control instruction is not sent, air conditioner is continued to run with, and
When air conditioner continues to run with preset duration Δ t, the lack of fluorine of air-conditioners guard method is triggered；
Second trigger module, in Δ qm<0, and η is when being not more than the predetermined threshold value, and shutdown control instruction is not sent,
Air conditioner is continued to run with, and when air conditioner continues to run with preset duration Δ t, triggers the lack of fluorine of air-conditioners guard method, its
In, Δ qm=qm- Q, η=| Δ qm|/Q0* 100%.
For lack of fluorine of air-conditioners protection device disclosed in the embodiment of the present invention three, because it is disclosed with various embodiments above
Lack of fluorine of air-conditioners guard method it is corresponding, so description it is fairly simple, related similarity is referred in various embodiments above
The explanation of lack of fluorine of air-conditioners guard method part, is no longer described in detail herein.
Example IV
The present embodiment four discloses a kind of air conditioner, and the air conditioner includes the lack of fluorine of air-conditioners protection dress described in embodiment three
Put, air conditioner by described device can timing (in running, at interval of certain time) detecting system in refrigerant mass flow
Amount, and it is compared with the initial mass flow value after installation, judge whether system refrigerant leaks, and when leaking generation
Continue to determine whether that leak more needs carries out stoppage protection in time.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
Realized by the mode of software plus required general hardware platform.Understood based on such, the technical scheme essence of the application
On the part that is contributed in other words to prior art can be embodied in the form of software product, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are to cause a computer equipment
(can be personal computer, server, or network equipment etc.) performs some of each embodiment of the application or embodiment
Method described in part.
Finally, in addition it is also necessary to explanation, herein, the relational terms of such as first, second, third and fourth or the like
It is used merely to make a distinction an entity or operation with another entity or operation, and not necessarily requires or imply these
There is any this actual relation or order between entity or operation.Moreover, term " comprising ", "comprising" or its is any
Other variants are intended to including for nonexcludability, so that process, method, article or equipment including a series of key elements
Not only include those key elements, but also other key elements including being not expressly set out, or also include being this process, side
Method, article or the intrinsic key element of equipment.In the absence of more restrictions, limited by sentence "including a ..."
Key element, it is not excluded that also there is other identical element in the process including the key element, method, article or equipment.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (14)
1. a kind of lack of fluorine of air-conditioners guard method, it is characterised in that including：
When meeting default testing conditions, current refrigerant mass fluxes q in real time is obtainedm, while normal according to what is pre-established
Corresponding relation between mass flow and operating condition, obtains the normal mass flow Q corresponding to current operating condition；
In the current refrigerant mass fluxes q in real timemDuring less than the normal mass flow Q, using preset formula to described
Normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, obtain the mass-flow change rate of refrigerant
η；Wherein, the mass-flow change rate η calculated using the preset formula value is bigger, characterizes refrigerant leakage rate and gets over
It is many；
Judge whether the mass-flow change rate η is more than predetermined threshold value；
If the determination result is YES, then stoppage protection instruction is sent, stoppage protection is carried out to air conditioner to realize.
2. according to the method described in claim 1, it is characterised in that described to obtain current refrigerant mass fluxes q in real timemBag
Include：
Compensation temperature Δ t is obtained, and obtains current compressor air suction temperature t in real timeInhale, temperature at first U pipe of evaporator
Spend tEvaporator, compressor volume flow qV；
To the current compressor air suction temperature t in real timeInhale, temperature t at first U pipe of evaporatorEvaporatorAnd compensation temperature Δ t
Handled, obtain current compressor air suction specific volume ν in real timeInhale；
Utilize formula qm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
3. method according to claim 2, it is characterised in that if the compressor of air conditioner is to determine frequency machine, the compression
Machine volume flow qVFor the steady state value pre-entered in air-conditioning system；If the compressor of air conditioner is frequency changer, the compression
Machine volume flow qVValue be qV=f × Vp, wherein：
F represents the operating frequency of compressor, VpRepresent the swept volume of compressor.
4. method according to claim 2, it is characterised in that under refrigeration mode, tEvaporator=tC evaporators；Under heating mode,
tEvaporator=tH evaporators, wherein：
tC evaporatorsRepresent that indoor heat exchanger is used as temperature during evaporator at first U pipe, tH evaporatorsRepresent that outdoor heat exchanger is used as steaming
Temperature when sending out device at first U pipe.
5. according to the method described in claim 1, it is characterised in that normal mass flow and operation that the foundation is pre-established
The corresponding relation of operating mode, obtains the normal mass flow Q corresponding to current operating condition, including：
From the mass flow matrix table pre-established, inquire and current indoor environment temperature tin, outdoor environment temperature tout
Corresponding normal mass flow Q, wherein, the mass flow matrix table have recorded indoor and outdoor environment temperature and normal quality
Corresponding relation between flow.
6. according to the method described in claim 1, it is characterised in that the utilization preset formula is to the normal mass flow Q
And current refrigerant mass fluxes q in real timemCalculated, obtaining the mass-flow change rate η of refrigerant includes：
Using formula η=| qm- Q |/Q*100% calculates the mass-flow change rate η of refrigerant.
7. according to the method described in claim 1, it is characterised in that the testing conditions are any one in following condition：
Preset duration Δ T is run after air conditioner start, or,
On the premise of air conditioner continuous service, by Δ T durations after last round of lack of fluorine of air-conditioners guard method execution terminates.
8. according to the method described in claim 1, it is characterised in that also include：
If Δ qm>=0, then shutdown control instruction is not sent, air conditioner is continued to run with, and continues to run with preset duration in air conditioner
During Δ T, the lack of fluorine of air-conditioners guard method is triggered；
If Δ qm＜ 0, and η is not more than the predetermined threshold value, then does not send shutdown control instruction, continue to run with air conditioner, and
When air conditioner continues to run with preset duration Δ T, the lack of fluorine of air-conditioners guard method is triggered, wherein, Δ qm=qm- Q, η=| Δ qm
|/Q0* 100%.
9. a kind of lack of fluorine of air-conditioners protection device, it is characterised in that including：
Acquisition module, for when meeting default testing conditions, obtaining current refrigerant mass fluxes q in real timem, while according to
According to the corresponding relation between the normal mass flow and operating condition pre-established, obtain normal corresponding to current operating condition
Mass flow Q；
Computing module, in the current refrigerant mass fluxes q in real timemDuring less than the normal mass flow Q, utilize
Preset formula is to the normal mass flow Q and current refrigerant mass fluxes q in real timemCalculated, obtain refrigerant
Mass-flow change rate η；Wherein, the mass-flow change rate η calculated using the preset formula value is bigger, characterizes
Refrigerant leakage rate is more；
Judge module, for judging whether the mass-flow change rate η is more than predetermined threshold value；
Control module, during for being in judged result, sending stoppage protection instruction, shutdown guarantor is carried out to air conditioner to realize
Shield.
10. device according to claim 9, it is characterised in that the acquisition module includes first acquisition unit and second
Acquiring unit, wherein, the first acquisition unit includes：
Subelement is obtained, for obtaining compensation temperature Δ t, and current compressor air suction temperature t in real time is obtainedInhale, evaporator
Temperature t at first U pipeEvaporator, compressor volume flow qV；
Subelement is handled, for the current compressor air suction temperature t in real timeInhale, temperature at first U pipe of evaporator
tEvaporatorAnd compensation temperature Δ t processing, obtain current compressor air suction specific volume ν in real timeInhale；
Computation subunit, for utilizing formula qm=qV/νInhaleCalculate the refrigerant mass fluxes qm。
11. device according to claim 10, it is characterised in that the second acquisition unit includes：
Subelement is inquired about, for from the mass flow matrix table pre-established, inquiring and current indoor environment temperature tin、
Outdoor environment temperature toutCorresponding normal mass flow Q, wherein, the mass flow matrix table have recorded indoor and outdoor environment
Corresponding relation between temperature and normal mass flow.
12. device according to claim 9, it is characterised in that the computing module includes：
Rate of change computing unit, for using formula η=| qm- Q |/Q*100% calculates the mass-flow change rate η of refrigerant.
13. device according to claim 9, it is characterised in that also include：
First trigger module, in Δ qmWhen >=0, shutdown control instruction is not sent, air conditioner is continued to run with, and in air-conditioning
When device continues to run with preset duration Δ t, the lack of fluorine of air-conditioners guard method is triggered；
Second trigger module, in Δ qm＜ 0, and η is when being not more than the predetermined threshold value, and shutdown control instruction is not sent, makes sky
Adjust device to continue to run with, and when air conditioner continues to run with preset duration Δ t, trigger the lack of fluorine of air-conditioners guard method, wherein, Δ
qm=qm- Q, η=| Δ qm|/Q0* 100%.
14. a kind of air conditioner, it is characterised in that including the device as described in claim 9-13 any one.
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| CN105423487B (en) * | 2015-11-17 | 2019-03-12 | 四川长虹电器股份有限公司 | A kind of information processing method and temperature control equipment |
| CN105890116B (en) * | 2016-04-27 | 2019-02-15 | 芜湖美智空调设备有限公司 | The detection method and system of air conditioner coolant leakage |
| CN106839276A (en) * | 2017-01-03 | 2017-06-13 | 青岛海尔空调器有限总公司 | The control method and air-conditioning of a kind of lack of fluorine of air-conditioners detection |
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| CN110094843B (en) * | 2019-05-07 | 2020-11-10 | 珠海格力电器股份有限公司 | Method and device for controlling air conditioner based on refrigerant shortage grade |
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