CN106403169B - Fluorine-deficient protection method and device and air conditioner - Google Patents

Fluorine-deficient protection method and device and air conditioner Download PDF

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CN106403169B
CN106403169B CN201610806996.4A CN201610806996A CN106403169B CN 106403169 B CN106403169 B CN 106403169B CN 201610806996 A CN201610806996 A CN 201610806996A CN 106403169 B CN106403169 B CN 106403169B
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temperature
air conditioning
conditioning equipment
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temperature variation
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CN106403169A (en
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邓李娇
荆振洋
张瀛龙
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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

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Abstract

The embodiment of the invention discloses a fluorine-deficient protection method and device and an air conditioner. Wherein, the method comprises the following steps: determining the temperature variation of the air conditioning equipment, correcting the temperature variation according to the running state of the air conditioning equipment, and controlling the air conditioning equipment to perform fluorine deficiency protection according to the corrected temperature variation. The technical scheme provided by the embodiment of the invention can more comprehensively and accurately judge the fluorine deficiency condition of the system and improve the reliability of fluorine deficiency protection of the system.

Description

Fluorine-deficient protection method and device and air conditioner
Technical Field
The embodiment of the invention relates to the technical field of air conditioner control, in particular to a fluorine-deficient protection method and device and an air conditioner.
Background
The air conditioner may have refrigerant leakage during operation. When the air conditioner is lack of refrigerant, the normal operation of the system is influenced and even danger is caused. For example, when the R32 refrigerant leaks, the R32 refrigerant is mixed with air and explodes.
The existing air conditioner fluorine deficiency protection method generally only judges whether the air conditioning system is fluorine deficient according to the temperature change in the air conditioning system. The existing fluorine-lacking protection method is inaccurate in fluorine-lacking judgment and low in reliability.
Disclosure of Invention
The invention provides a fluorine-deficient protection method and device and an air conditioner, which are used for accurately monitoring whether a refrigerant in an air conditioning system leaks or not and carrying out protection control when the refrigerant leaks.
In a first aspect, an embodiment of the present invention provides a fluorine deficiency protection method, including:
determining the temperature variation of the air conditioning equipment;
correcting the temperature variation according to the running state of the air conditioning equipment;
and controlling the air conditioning equipment to perform fluorine-lacking protection according to the corrected temperature change amount.
In a second aspect, an embodiment of the present invention further provides a fluorine-deficient protection device, where the device includes:
the temperature variation determining module is used for determining the temperature variation of the air conditioning equipment;
the temperature variation correction module is used for correcting the temperature variation according to the running state of the air conditioning equipment;
and the fluorine-lacking protection module is used for controlling the air conditioning equipment to perform fluorine-lacking protection according to the corrected temperature change amount.
In a third aspect, an embodiment of the present invention further provides an air conditioning apparatus, where the air conditioning apparatus includes the fluorine-deficient protection device provided in any embodiment of the present invention.
According to the embodiment of the invention, the temperature variation of the air conditioning equipment is determined, the temperature variation is corrected according to the running state of the air conditioning equipment, namely the change of the system temperature caused by the running state of the system is corrected, because the corrected temperature variation can better reflect whether the air conditioning equipment lacks fluorine, the air conditioning equipment is controlled to carry out fluorine-lacking protection according to the corrected temperature variation, the fluorine-lacking condition of the system can be judged comprehensively and accurately, and the reliability of the fluorine-lacking protection of the system is improved.
Drawings
FIG. 1 is a schematic flow chart of a fluorine deficiency protection method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a fluorine deficiency protection method according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a fluorine deficiency protection method provided by a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fluorine-deficient protection device according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic flow chart of a fluorine-deficient protection method according to an embodiment of the present invention. The embodiment can be applied to the condition of judging whether the air-conditioning equipment lacks fluorine and carrying out fluorine-lacking protection when the air-conditioning equipment lacks fluorine. The method can be carried out by a fluorine-deficient protection device, which can be implemented by hardware and/or software, in particular integrated in an air conditioning system. Referring to fig. 1, the method for protecting against fluorine deficiency provided in this embodiment includes:
and S110, determining the temperature variation of the air conditioning equipment.
The temperature variation of the air conditioner refers to the temperature variation of the air conditioner system in a period of time. The temperature change of the evaporator and the condenser of the air conditioning equipment can be specifically realized. For example, if the temperature of the air conditioner at the first time is T1 and the temperature of the air conditioner at the second time is T2, the amount of change in the temperature of the air conditioner is T2 to T1. Specifically, the temperature of the air conditioning equipment can be acquired through a temperature sensor on the air conditioning equipment, and then the temperature variation of the air conditioning equipment is determined.
And S120, correcting the temperature variation according to the operation state of the air conditioning equipment.
The temperature variation of the air conditioner is mainly a variation caused by the action of a refrigerant in the air conditioner, but the operating state of the air conditioner also affects the temperature variation. The operation state of the air conditioning equipment may include states of air volume, frequency and the like of an internal fan of the air conditioning equipment.
When the system state changes, the operation parameters of the system also change, and if the influence of the system operation state is not considered, the fluorine-lacking protection may fail. In order to more accurately determine the influence of the refrigerant on the temperature variation of the air conditioning equipment, the temperature variation may be corrected according to the operating state of the air conditioning equipment. The corrected temperature variation can more accurately reflect whether the refrigerant quantity in the air conditioning equipment system is lack or not. For example, the correction process may use the amount of temperature change of the air conditioning equipment to subtract the amount of temperature change of the system caused by the system operating state, so as to obtain the corrected temperature change amount.
And S130, controlling the air conditioning equipment to perform fluorine deficiency protection according to the corrected temperature change amount.
The modified temperature variation can more accurately reflect whether the refrigerant in the air-conditioning equipment system leaks, and when the air-conditioning equipment is controlled to perform fluorine-lacking protection according to the modified temperature variation, the refrigerant in the air-conditioning system can be accurately monitored to be leaked, and the protection control can be performed in time when the refrigerant leaks. Specifically, the controlling of the air conditioning equipment to perform the fluorine-deficient protection according to the corrected temperature variation may be to judge whether the corrected temperature variation satisfies a preset condition for the fluorine-deficient protection, and if the corrected temperature variation satisfies the preset condition for the fluorine-deficient protection, the air conditioning equipment is controlled to perform the fluorine-deficient protection. When the air conditioning equipment is controlled to perform fluorine-lacking protection, the internal and external fans, the display interface, the compressor, the four-way valve and the like of the air conditioning equipment can be respectively controlled to perform corresponding actions. For example, the compressor and the outer fan are controlled to stop running, the four-way valve is not reversed, the inner fan continues running, and a warning signal of a fluorine-lacking fault can be displayed on a display screen of the air conditioning equipment.
According to the technical scheme provided by the embodiment of the invention, the temperature variation of the air conditioning equipment is determined, the temperature variation is corrected according to the running state of the air conditioning equipment, namely the change of the system temperature caused by the running state of the system is corrected, because the corrected temperature variation can better reflect whether the air conditioning equipment lacks fluorine, the air conditioning equipment is controlled to carry out fluorine-lacking protection according to the corrected temperature variation, the fluorine-lacking condition of the system can be judged comprehensively and accurately, and the reliability of the fluorine-lacking protection of the system is improved.
Example two
Fig. 2 is a schematic flow chart of a fluorine-deficient protection method according to a second embodiment of the present invention. The present embodiment performs an optimization operation based on the first embodiment. Referring to fig. 2, the fluorine deficiency method provided in this embodiment includes:
and S210, determining the temperature variation of the air conditioning equipment.
And S220, correcting the temperature variation according to the air volume of the indoor fan of the air conditioning equipment.
Specifically, in the cooling mode, the temperature change amount may be corrected using the following equation:
corrected temperature change amount is the absolute value of the temperature change amount
Figure GDA0002600587840000051
And k is a positive integer and is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
For example, when the air conditioning equipment has four gears of a low gear, a medium gear, a high gear and an ultra-high gear, when the air conditioning equipment is operated in the low gear, k is 1; when the air conditioning equipment runs in a medium gear, k is 2; when the air conditioning equipment runs in a high wind gear, k is 3; when the air conditioning equipment runs in the super-strong gear, k is 4.
In the heating mode, the temperature change amount may be corrected using the following equation:
corrected temperature change amount is the absolute value of the temperature change amount
Figure GDA0002600587840000052
And k is a positive integer and is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
And S130, controlling the air conditioning equipment to perform fluorine deficiency protection according to the corrected temperature change amount.
According to the technical scheme provided by the embodiment, the temperature variation, namely the variation of the system temperature caused by the system air volume and the like is corrected according to the air volume of the indoor fan of the air conditioning equipment, and the corrected temperature variation can better reflect whether the air conditioning equipment is lack of fluorine or not, and the air conditioning equipment is controlled to carry out fluorine deficiency protection according to the corrected temperature variation, so that the fluorine deficiency condition of the system can be judged comprehensively and accurately, and the reliability of the fluorine deficiency protection of the system is improved.
EXAMPLE III
Fig. 3 is a schematic flow chart of a fluorine deficiency protection method according to a third embodiment of the present invention. The present embodiment performs an optimization operation based on the second embodiment. Referring to fig. 3, the fluorine deficiency method provided in this embodiment includes:
s310, acquiring the indoor environment temperature of the air conditioning equipment at the first moment and the evaporator pipe temperature of the evaporator of the air conditioning equipment at the first moment.
And S320, acquiring the tube temperature of the evaporator of the air conditioning equipment at the second moment.
S330, acquiring the condenser pipe temperature of the air conditioning equipment condenser at a first moment and the condenser pipe temperature of the condenser at a second moment.
Specifically, the indoor environment temperature of the air conditioner at the first moment, the evaporator pipe temperature of the evaporator at the first moment, the condenser pipe temperature of the condenser at the first moment, the evaporator pipe temperature of the evaporator at the second moment and the condenser pipe temperature of the condenser at the second moment can be acquired through the temperature sensor on the air conditioner. Preferably, the first time may be a compressor turn-on time of the air conditioner.
The second time is a time that is located after the first time. Preferably, the second time is after the first time, and a preset time is arranged between the second time and the fan gear shifting time. The temperature of the evaporator and the temperature of the condenser are not detected within the preset time after the gear shift of the fan, and the temperature of the evaporator and the condenser is detected after the preset time after the gear shift of the fan. After the gear of the fan is switched, the system is in an unstable state, and the parameters of the system are unstable, so that if the temperature of the evaporator and the temperature of the tubes and the temperature of the condenser are detected immediately at the moment, and fluorine deficiency judgment is carried out, the error may be relatively large.
And S340, determining a first temperature variation and a second temperature variation of the air conditioning equipment.
The first temperature variation is the temperature difference between the tube temperature of the evaporator at the second moment and the indoor environment temperature of the air conditioning equipment at the first moment, and the second temperature variation is the difference between the tube temperature of the evaporator at the second moment and the tube temperature of the evaporator at the first moment.
For example, the tube temperature of the evaporator at the second time is T2, the indoor environment temperature of the air conditioner at the first time is T1, and the first temperature variation amount is T2 to T1.
And S350, correcting the first temperature variation and the second temperature variation according to the air volume of an indoor fan of the air conditioning equipment.
And S360, if the corrected first temperature variation is in a first preset range, the corrected second temperature variation is in a second preset range, and the condenser tube temperature of the condenser at the second moment and the condenser tube temperature of the condenser at the first moment are in a third preset range, controlling the air conditioning equipment to perform fluorine-lacking protection.
The technical scheme provided by the embodiment can realize comprehensive and accurate judgment of the fluorine lack condition of the system and improve the reliability of fluorine lack protection of the system.
The technical solution is described in detail by way of example below:
(1) and starting the air conditioning equipment, and operating the air conditioning equipment in a refrigeration mode.
Indoor environment temperature T of air conditioning equipment at starting time of collecting compressorRing 0Evaporator tube temperature TInner pipe 0And condenser tube temperature TOuter tube 0. Collecting the tube temperature T of the evaporator after the compressor is started and continuously runs for N minutesInner pipe 1And condenser tube temperature TOuter tube 1. Determining a first temperature change Δ T1＝TInner pipe 1-TInner ring 0Second temperature change amount Δ T2＝TInner pipe 1-TInner pipe 0. And in X minutes after the wind gear is switched, the temperature of the evaporator tube and the temperature of the condenser tube are not detected and collected, and the detection is started after X minutes.
And detecting the gear of the indoor fan of the air conditioner, and correcting the first temperature variation and the second temperature variation according to the air volume of the indoor fan. Corrected first temperature variation Δ TCorrection 1Absolute value of first temperature variation
Figure GDA0002600587840000071
Corrected second temperature variation Δ TCorrection 2Absolute value of second temperature variation
Figure GDA0002600587840000072
Wherein k is an integer greater than zero. The value of k is related to the gear of the inner fan, and when the gear of the inner fan is larger, the value of k is larger;
judgment correctionThe first temperature variation, the second temperature variation and the condenser tube temperature TOuter tube 1And the pipe temperature T of the condenser pipeOuter tube 0Whether the difference satisfies the following conditions:
ΔTcorrection 1≤TRefrigeration fluorine deficiency protection threshold 1；
ΔTCorrection 2≤TRefrigeration fluorine deficiency protection threshold 2；
TOuter tube 1-TOuter tube 0≤TRefrigeration fluorine deficiency protection threshold 3；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
Wherein, TRefrigeration fluorine deficiency protection threshold 1＝A℃，TRefrigeration fluorine deficiency protection threshold 2＝B℃，TRefrigeration fluorine deficiency protection threshold 3C ═ C. A. The values of B, C, k, X and N can be set according to actual conditions. If they can be equal to 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9, they can be the same or different.
(2) And starting the air conditioning equipment, and operating the air conditioning equipment in a heating mode.
Indoor environment temperature T of air conditioning equipment at starting time of collecting compressorRing 0Evaporator tube temperature TInner pipe 0And condenser tube temperature TOuter tube 0. Collecting the tube temperature T of the evaporator after the compressor is started and continuously operated for M minutesInner pipe 1Condenser tube temperature TOuter tube 1And outdoor ambient temperature TRing 1. Determining a first temperature change Δ T1＝TInner pipe 1-TInner ring 0Second temperature change amount Δ T2＝TInner pipe 1-TInner pipe 0. And in X minutes after the wind gear is switched, the temperature of the evaporator tube and the temperature of the condenser tube are not detected and collected, and the detection is started after X minutes.
And detecting the gear of the indoor fan of the air conditioner, and correcting the first temperature variation and the second temperature variation according to the air volume of the indoor fan. Corrected first temperature variation Δ TCorrection 1Absolute value of first temperature variation
Figure GDA0002600587840000081
Corrected second temperature variation Δ TCorrection 2Absolute value of second temperature variation
Figure GDA0002600587840000082
k >0 and is an integer. The value of k is related to the gear of the inner fan, and when the gear of the inner fan is larger, the value of k is larger;
at TRing 1When the temperature is more than or equal to W ℃, the corrected first temperature variation, the corrected second temperature variation and the condenser tube temperature T are judgedOuter tube 1And the pipe temperature T of the condenser pipeOuter tube 0Whether the difference satisfies the following conditions:
ΔTcorrection 1≤THeating fluorine deficiency protection threshold value 1；
ΔTCorrection 2≤THeating fluorine deficiency protection threshold 2；
TOuter tube 0-TOuter tube 1≥THeating fluorine deficiency protection threshold 3；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
At TRing 1When the temperature is lower than W ℃, the corrected first temperature variation, the corrected second temperature variation and the condenser tube temperature T are judgedOuter tube 1And the pipe temperature T of the condenser pipeOuter tube 0Whether the difference satisfies the following conditions:
ΔTcorrection 1≤THeating fluorine-deficient protection threshold 4；
ΔTCorrection 2≤THeating fluorine-deficient protection threshold 5；
TOuter tube 0-TOuter tube 1≥THeating fluorine-deficient protection threshold 6；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
Wherein, THeating fluorine deficiency protection threshold value 1＝T1℃,THeating fluorine deficiency protection threshold 2＝U1℃,THeating fluorine deficiency protection threshold 3＝V1℃；
TProtection threshold for lack of fluorine in heating4＝T2℃；THeating fluorine-deficient protection threshold 5＝U2℃，THeating fluorine-deficient protection threshold 6＝V2℃；
M, X, T1, T2, U1, U2, V1 and V2 can be set according to actual conditions, for example, 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 are equal, and they may be the same or different. The value of W can also be set according to the actual situation, such as-15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, etc.
(3) And starting the air conditioning equipment, and operating the air conditioning equipment in a refrigeration mode.
Indoor environment temperature T of air conditioning equipment at starting time of collecting compressorRing 0Evaporator tube temperature TInner pipe 0And condenser tube temperature TOuter tube 0. Under the current fan gear, after the compressor continuously runs for 4 minutes, the temperature T of the evaporator tube is collectedInner pipe 1Condenser tube temperature TOuter tube 1. Determining a first temperature change Δ T1＝TInner pipe 1-TInner ring 0Second temperature change amount Δ T2＝TInner pipe 1-TInner pipe 0。
And detecting the gear of the indoor fan of the air conditioner, and correcting the first temperature variation and the second temperature variation according to the air volume of the indoor fan. Corrected first temperature variation Δ TCorrection 1Absolute value of first temperature variation
Figure GDA0002600587840000091
Corrected second temperature variation Δ TCorrection 2Absolute value of second temperature variation
Figure GDA0002600587840000092
Wherein k >0 and is an integer. The value of k is related to the gear of the inner fan, and the value of k corresponds to the following:
low wind gear, k is 1; a middle gear, k is 2; high gear, k is 3; and k is 4.
Detecting that the gear of the indoor fan of the air conditioner is a high gear, wherein at the moment, the delta TCorrection 1＝|ΔT1|-0.88；
Judging the corrected first temperature variation, the corrected second temperature variation and the condenser tube temperature TOuter tube 1And the pipe temperature T of the condenser pipeOuter tube 0The difference satisfies the following conditions:
ΔTcorrection 1≤2°；
ΔTCorrection 2≤2°；
TOuter tube 1-TOuter tube 0≤3°；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
(4) And starting the air conditioning equipment, and operating the air conditioning equipment in a heating mode.
Indoor environment temperature T of air conditioning equipment at starting time of collecting compressorRing 0Evaporator tube temperature TInner pipe 0And condenser tube temperature TOuter tube 0. Collecting the tube temperature T of the evaporator after the compressor continuously runs for 3 minutes under the current fan gearInner pipe 1Condenser tube temperature TOuter tube 1And outdoor ambient temperature TRing 1. Determining a first temperature change Δ T1＝TInner pipe 1-TInner ring 0Second temperature change amount Δ T2＝TInner pipe 1-TInner pipe 0。
And detecting the gear of the indoor fan of the air conditioner, and correcting the first temperature variation and the second temperature variation according to the air volume of the indoor fan. Corrected first temperature variation Δ TCorrection 1Absolute value of first temperature variation
Figure GDA0002600587840000101
Corrected second temperature variation Δ TCorrection 2Absolute value of second temperature variation
Figure GDA0002600587840000102
Wherein k >0 and is an integer. The value of k is related to the gear of the inner fan, and the value of k corresponds to the following:
low wind gear, k is 1; a middle gear, k is 2; high gear, k is 3; and k is 4.
At the moment, the gear of the indoor fan of the air conditioner is detected to be a high gear, delta TCorrection 1＝|ΔT1|-0.44；
At TRing 1When the temperature is more than or equal to-10 ℃, judging whether the corrected first temperature variation, the second temperature variation and the difference between the condenser tube temperature T outer tube 1 and the condenser tube temperature T outer tube 0 simultaneously meet the following conditions:
ΔTcorrection 1≤7°；
ΔTCorrection 2≤7°；
TOuter tube 0-TOuter tube 1≥15°；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
At TRing 1Judging the corrected first temperature variation, the corrected second temperature variation and the condenser tube temperature T when the temperature is less than-10 DEG COuter tube 1And the pipe temperature T of the condenser pipeOuter tube 0Whether the difference satisfies the following conditions:
ΔTcorrection 1≤7°；
ΔTCorrection 2≤7°；
TOuter tube 0-TOuter tube 1≥11°；
And if the conditions are met simultaneously, determining that the air conditioning equipment is lack of fluorine, and performing fluorine-lack protection.
Example four
Fig. 4 is a schematic structural diagram of a fluorine-deficient protection device according to a fourth embodiment of the present invention. Referring to fig. 4, the apparatus includes:
a temperature variation determining module 410 for determining a temperature variation of the air conditioning equipment;
a temperature variation correction module 420 for correcting the temperature variation according to the operation state of the air conditioning equipment;
and a fluorine deficiency protection module 430, configured to control the air conditioning equipment to perform fluorine deficiency protection according to the corrected temperature variation.
Further, the temperature variation correction module 420 is specifically configured to:
and correcting the temperature variation according to the air volume of the indoor fan of the air conditioning equipment.
Further, the temperature variation determining module 410 includes:
a first temperature obtaining unit 411, configured to obtain an indoor ambient temperature at which the air conditioner is located at a first time and an evaporator tube temperature of an evaporator of the air conditioner at the first time;
a second temperature obtaining unit 412, configured to obtain an evaporator tube temperature of the air conditioning equipment at a second time;
a temperature change amount determination unit 413 for determining a first temperature change amount and a second temperature change amount of the air conditioning apparatus;
the first temperature variation is the temperature difference between the tube temperature of the evaporator at the second moment and the indoor environment temperature of the air conditioning equipment at the first moment, and the second temperature variation is the difference between the tube temperature of the evaporator at the second moment and the tube temperature of the evaporator at the first moment.
Further, the temperature variation correction module 420 is specifically configured to:
in the cooling mode, the first temperature variation amount and the second temperature variation amount are corrected using the following equations:
corrected temperature change amount is the absolute value of the temperature change amount
Figure GDA0002600587840000121
And k is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
Further, the temperature variation correction module 420 is specifically configured to:
in the heating mode, the first temperature variation amount and the second temperature variation amount are corrected using the following equations:
corrected temperature change amount is the absolute value of the temperature change amount
Figure GDA0002600587840000122
And k is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
Further, the apparatus further comprises:
a third temperature obtaining module 440, configured to obtain a condenser tube temperature of the condenser of the air conditioning equipment at a first time and a condenser tube temperature of the condenser at a second time before correcting the temperature variation according to the operating state of the air conditioning equipment to control the air conditioning equipment to perform fluorine deficiency protection according to the corrected temperature variation;
the fluorine deficiency protection module 430 is configured to control the air conditioning equipment to perform fluorine deficiency protection if the corrected first temperature variation is within a first preset range, the corrected second temperature variation is within a second preset range, and the condenser tube temperature of the condenser at the second time and the condenser tube temperature of the condenser at the first time are within a third preset range.
The device can execute the fluorine-lacking protection method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
The embodiment of the invention also provides air conditioning equipment which comprises the fluorine-deficient protection device in any embodiment of the invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A fluorine deficient protection method comprising:
determining the temperature variation of the air conditioning equipment;
correcting the temperature variation according to the running state of the air conditioning equipment;
the correcting the temperature variation amount according to the operation state of the air conditioning equipment includes: correcting the temperature variation according to the air volume of an indoor fan of the air conditioning equipment;
controlling the air conditioning equipment to perform fluorine-lacking protection according to the corrected temperature change amount;
the correcting the temperature variation according to the air volume of the indoor fan of the air conditioning equipment includes:
in the cooling mode, the temperature variation is corrected using the following equation:
corrected temperature change amount is the absolute value of the temperature change amount
Figure FDA0002600587830000011
And k is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
2. The method of claim 1, wherein determining the temperature change amount of the air conditioning equipment comprises:
acquiring the indoor environment temperature of the air conditioning equipment at a first moment and the evaporator tube temperature of an evaporator of the air conditioning equipment at the first moment;
acquiring the tube temperature of the evaporator of the air conditioning equipment at a second moment;
determining a first temperature variation and a second temperature variation of the air conditioning equipment;
the first temperature variation is the temperature difference between the tube temperature of the evaporator at the second moment and the indoor environment temperature of the air conditioning equipment at the first moment, and the second temperature variation is the difference between the tube temperature of the evaporator at the second moment and the tube temperature of the evaporator at the first moment.
3. The method according to claim 1, wherein the correcting the temperature variation amount according to an indoor fan air volume of an air conditioning apparatus further comprises:
in the heating mode, the temperature change amount is corrected using the following equation:
corrected temperature change amount is the absolute value of the temperature change amount
Figure FDA0002600587830000021
And k is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
4. The method according to claim 2, wherein before correcting the temperature change amount according to the operating state of the air conditioning equipment, the method further comprises:
acquiring the condenser pipe temperature of the condenser of the air conditioning equipment at a first moment and the condenser pipe temperature of the condenser at a second moment;
the method for controlling the air conditioning equipment to perform fluorine-lacking protection according to the corrected temperature change amount comprises the following steps:
and if the corrected first temperature variation is in a first preset range, the corrected second temperature variation is in a second preset range, and the difference between the condenser pipe temperature of the condenser at the second moment and the condenser pipe temperature of the condenser at the first moment is in a third preset range, controlling the air conditioning equipment to perform fluorine-lacking protection.
5. A fluorine deficient protective device comprising:
the temperature variation determining module is used for determining the temperature variation of the air conditioning equipment;
the temperature variation correction module is used for correcting the temperature variation according to the running state of the air conditioning equipment;
the temperature variation correction module is specifically used for correcting the temperature variation according to the air volume of an indoor fan of the air conditioning equipment;
wherein, in the cooling mode, the temperature variation is corrected using the following formula:
corrected temperature change amount is the absolute value of the temperature change amount
Figure FDA0002600587830000022
K is in direct proportion to the gear of an indoor fan of the air conditioning equipment;
and the fluorine-lacking protection module is used for controlling the air conditioning equipment to perform fluorine-lacking protection according to the corrected temperature change amount.
6. The apparatus of claim 5, wherein the temperature change determination module comprises:
the air conditioning system comprises a first temperature acquisition unit, a second temperature acquisition unit and a control unit, wherein the first temperature acquisition unit is used for acquiring the indoor environment temperature of the air conditioning equipment at a first moment and the evaporator pipe temperature of an evaporator of the air conditioning equipment at the first moment;
the second temperature acquisition unit is used for acquiring the tube temperature of the evaporator of the air conditioning equipment at a second moment;
a temperature change amount determination unit for determining a first temperature change amount and a second temperature change amount of the air conditioning apparatus;
the first temperature variation is the temperature difference between the tube temperature of the evaporator at the second moment and the indoor environment temperature of the air conditioning equipment at the first moment, and the second temperature variation is the difference between the tube temperature of the evaporator at the second moment and the tube temperature of the evaporator at the first moment.
7. The apparatus according to claim 5, wherein the temperature variation correction module is further specifically configured to:
in the heating mode, the temperature change amount is corrected using the following equation:
corrected temperature change amount is the absolute value of the temperature change amount
Figure FDA0002600587830000031
And k is in direct proportion to the gear of an indoor fan of the air conditioning equipment.
8. The apparatus of claim 6, further comprising:
the third temperature acquisition module is used for acquiring the condenser temperature of the condenser of the air conditioning equipment at a first moment and the condenser temperature of the condenser at a second moment before correcting the temperature variation according to the running state of the air conditioning equipment;
the fluorine-lacking protection module is used for controlling the air conditioning equipment to perform fluorine-lacking protection if the corrected first temperature variation is within a first preset range, the corrected second temperature variation is within a second preset range, and the difference between the condenser pipe temperature of the condenser at the second moment and the condenser pipe temperature of the condenser at the first moment is within a third preset range.
9. An air conditioning apparatus comprising the fluorine-deficient protective device according to any one of claims 5 to 8.
CN201610806996.4A 2016-09-06 2016-09-06 Fluorine-deficient protection method and device and air conditioner Active CN106403169B (en)

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CN109764490A (en) * 2019-01-21 2019-05-17 宁波奥克斯电气股份有限公司 Air conditioner coolant supply state detection method, device and air-conditioning and storage medium
CN112815478A (en) * 2020-12-31 2021-05-18 青岛海尔空调电子有限公司 Fluorine deficiency determination method for air conditioning system and air conditioning system

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