CN105066370B - Overload of compressor protects control method and device and air conditioner - Google Patents
Overload of compressor protects control method and device and air conditioner Download PDFInfo
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- CN105066370B CN105066370B CN201510557778.7A CN201510557778A CN105066370B CN 105066370 B CN105066370 B CN 105066370B CN 201510557778 A CN201510557778 A CN 201510557778A CN 105066370 B CN105066370 B CN 105066370B
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of overload of compressor protection control method and device and air conditioner.Wherein, overload of compressor protection control method includes：Detect the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner；Then the temperature difference of indoor temperature and inner tube temperature is calculated, obtains first temperature difference；The difference of first temperature difference and fiducial temperature is calculated again, obtains second temperature difference, wherein, fiducial temperature is the temperature difference in predetermined time indoor temperature and inner tube temperature；Judge whether compressor overload protection occurs according to second temperature difference；If it is judged that when overload protection occurs in compressor, control compressor is out of service.By the present invention, reduce compressor and the possibility that overload protection easily triggers system pipeline booster occurs.
Description
Technical field
The present invention relates to field of air conditioning, and control method and device and sky are protected in particular to a kind of overload of compressor
Adjust device.
Background technology
In today's society, the problem of energy and environment, increasingly attracts people's attention, especially the energy consumption and
The pollution of environment and destruction aspect.R22 refrigerants are that a kind of more refrigerant is applied in chlorofluoromethane refrigerant, since it is to smelly
Oxygen layer destruction is very big, has seriously endangered the living environment of the mankind and overall ecological environment, will gradually eliminate.R410A refrigerants are
As a kind of refrigerant of R22 substitutes, ozone layer is not destroyed, makes air-conditioning work efficient, but R22 refrigerants, R410A systems
The global warming potential (Global Warming Potentials, referred to as GWP) of cryogen is higher, belongs to the system of non-environmental protection
Cryogen.Therefore, the relatively low novel environment-friendly refrigerant of GWP value, such as exploitation R32 refrigerants are developed.R32 refrigerants do not destroy not only
Ozone layer, and good energy-conserving effect.But the saturation pressure of R32 refrigerants is higher by about 2.5% than R410A refrigerant, and
R32 refrigerants have certain combustibility, when R32 refrigerants are spilt because air-conditioning system pipeline booster is split, can trigger certain danger
It is dangerous.Thus for R32 refrigerants, the urgency that air-conditioning system pipeline booster splits leakage is prevented to be significantly larger than R22 refrigeration
Agent and R410A refrigerants.
At present, air conditioner, such as, air-conditioner with fixed frequency does not have overload of compressor to protect feedback function.When the compression of air conditioner
When overload protection occurs for machine, the main control computer of air conditioner cannot receive the overload protection information of compressor, can so make air conditioner
High frequent carry out overload protection, cause air-conditioning system pipeline continually to be impacted be subject to pulse, add system
The possibility of pipeline booster.On the other hand, after compressor is out of service, and indoor fan and outdoor fan continue to operate,
When special air conditioner is in heating mode, air conditioner there is a situation where to blow a cold wind over, and then have impact on the comfort that air conditioner uses.
The problem of for system pipeline booster is easily triggered due to compressor generation overload protection in correlation technique, at present still
Effective solution is not proposed.
The content of the invention
It is a primary object of the present invention to provide a kind of overload of compressor protection control method and device and air conditioner, so that
Solve the problems, such as easily to trigger system pipeline booster since overload protection occurs for compressor in correlation technique less.
To achieve these goals, according to an aspect of the invention, there is provided a kind of overload of compressor protects controlling party
Method, this method include：Detect the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner；Calculate indoor
The temperature difference of temperature and inner tube temperature, obtains first temperature difference；The difference of first temperature difference and fiducial temperature is calculated, obtains second temperature difference,
Wherein, fiducial temperature is the temperature difference in predetermined time indoor temperature and inner tube temperature；Whether compressor is judged according to second temperature difference
There is overload protection；If it is judged that when overload protection occurs in compressor, control compressor is out of service.
Further, second temperature difference is calculated in multiple periods, judges whether compressor occurs according to second temperature difference
Overload protection includes judging whether second temperature difference when the first preset time period meets the first preset condition；If it is judged that
Second temperature difference when the first preset time period meets the first preset condition, judges second when the second preset time period
Whether the temperature difference meets the second preset condition and judges whether second temperature difference when three preset time periods meets that the 3rd is default
Condition；If it is judged that second temperature difference when the second preset time period meets the second preset condition and when the 3rd is default
Between section when second temperature difference meet the 3rd preset condition, determine that overload protection occurs in compressor.
Further, after overload protection occurs in definite compressor, this method further includes：Statistics compressor overloads
The number of protection；Judge whether the number that overload protection occurs in compressor reaches preset times；If it is judged that compressor occurs
The number of overload protection reaches preset times, exports fault-signal, wherein, fault-signal is used to indicate that compressor breaks down.
Further, fault-signal can be released by performing any one following operation to air conditioner：Power-off, close
Machine or conversion operation pattern.
Further, if it is judged that overload protection occurs in compressor, after control compressor is out of service, this method is also
Including：Detect the operational mode of air conditioner；Control the outdoor fan of air conditioner to shut down, detecting that air conditioner is in refrigeration mode
When, control the indoor fan of air conditioner to start shooting, when detecting that air conditioner is in heating mode, control the indoor fan of air conditioner
Shut down.
To achieve these goals, according to another aspect of the present invention, a kind of overload of compressor protection control is additionally provided
Device, the device include：Detection unit, for detecting in the indoor temperature of air conditioner local environment and the compressor of air conditioner
Tube temperature degree；First computing unit, for calculating the temperature difference of indoor temperature and inner tube temperature, obtains first temperature difference；Second calculates list
Member, for calculating the difference of first temperature difference and fiducial temperature, obtains second temperature difference, wherein, fiducial temperature is in predetermined time room
The temperature difference of interior temperature and inner tube temperature；First judging unit, for judging whether compressor overload occurs and protect according to second temperature difference
Shield；Control unit, for when judging that overload protection occurs in compressor, control compressor to be out of service.
Further, second temperature difference is calculated within multiple periods, and the first judging unit of the device includes：First
Judgment module, for judging whether second temperature difference when the first preset time period meets the first preset condition；Second judges
Module, meets the first preset condition for second temperature difference when judging every the first preset time period, judges every second
Whether second temperature difference during preset time period meets the second preset condition and judges the second temperature when three preset time periods
Whether difference meets the 3rd preset condition；Determining module, expires for second temperature difference when judging every the second preset time period
The second preset condition of foot and second temperature difference the 3rd preset condition of satisfaction when three preset time periods, determine that compressor occurs
Overload protection.
Further, which further includes：, there is the number of overload protection for counting compressor in statistic unit；Second
Judging unit, for judging whether the number that overload protection occurs in compressor reaches preset times；Output unit, for judging
Go out the number that overload protection occurs in compressor and reach preset times, export fault-signal, wherein, fault-signal is used to indicate to compress
Machine breaks down.
Further, which further includes：Lifting unit, for being solved by performing any one following operation to air conditioner
Except fault-signal：Power-off, shutdown or conversion operation pattern.
Further, which further includes：Detection unit, for detecting the operational mode of air conditioner, wherein, control unit
Outdoor fan for controlling air conditioner is shut down, and when detecting that air conditioner is in refrigeration mode, controls the indoor wind of air conditioner
Machine is started shooting, and when detecting that air conditioner is in heating mode, controls the indoor fan of air conditioner to shut down.
To achieve these goals, according to another aspect of the present invention, a kind of air conditioner is additionally provided, the air conditioner bag
Include the overload of compressor protection control device of the present invention.
By the present invention, using the indoor temperature and the interior tube temperature of the compressor of air conditioner for detecting air conditioner local environment
Degree；Then according to the indoor temperature of air conditioner local environment and the inner tube temperature computation indoor temperature of the compressor of air conditioner with it is interior
The temperature difference of tube temperature degree, obtains first temperature difference, and second temperature difference can be calculated within multiple periods；Calculate again first temperature difference with
The difference of fiducial temperature, obtains second temperature difference, wherein, fiducial temperature is the temperature in predetermined time indoor temperature and inner tube temperature
Difference；Finally judge whether compressor overload protection occurs according to second temperature difference, if it is judged that when overload protection occurs in compressor,
Control compressor out of service, realize overload of compressor protection feedback function.Solve since overload protection occurs for compressor
The problem of easily triggering system pipeline booster, thereby reduces compressor generation overload protection and easily triggers system pipeline booster
Possibility.
Brief description of the drawings
The attached drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of overload of compressor protection control method according to a first embodiment of the present invention；
Fig. 2 is the flow chart of overload of compressor protection control method according to a second embodiment of the present invention；
Fig. 3 is the schematic diagram of overload of compressor protection control device according to a first embodiment of the present invention；
Fig. 4 is the schematic diagram of overload of compressor protection control device according to a second embodiment of the present invention；And
Fig. 5 is the schematic diagram of overload of compressor protection control device according to a third embodiment of the present invention.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
In order to make those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Attached drawing, is clearly and completely described the technical solution in the embodiment of the present application, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's all other embodiments obtained without making creative work, should all belong to the model of the application protection
Enclose.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
The present invention provides a kind of overload of compressor to protect control method.
Fig. 1 is the flow chart of overload of compressor protection control method according to a first embodiment of the present invention, and this method is used for
Overload of compressor protection is controlled.As shown in Figure 1, overload of compressor protection control method comprises the following steps：
Step S102, detects the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner.
After the compressor operating of air conditioner, the indoor temperature of air conditioner local environment and the pressure of air conditioner are detected respectively
The inner tube temperature of contracting machine.Alternatively, the compressor of the continuous indoor temperature for detecting air conditioner local environment and air conditioner is distinguished
The inner tube temperature of inner tube temperature, the indoor temperature of air conditioner local environment and the compressor of air conditioner has one by one at different moments
Corresponding relation.Preferably, after compression start operation, to residing for the air conditioner that has been detected by when preset time period
The indoor temperature of environment and the inner tube temperature of the compressor of air conditioner are sampled, such as, preset time period is 1 minute, or
30 seconds, or 2 minutes, then every 1 minute, either 30 seconds or 2 minutes to the indoor temperature of air conditioner local environment and with sky
Adjust device local environment the corresponding inner tube temperature of indoor temperature sampled, obtain when 1 minute, either 30 seconds when or 2
The indoor temperature of air conditioner local environment and inner tube temperature corresponding with the indoor temperature of air conditioner local environment during minute.
Step S104, calculates the temperature difference of indoor temperature and inner tube temperature, obtains first temperature difference.
After the indoor temperature and the inner tube temperature of the compressor of air conditioner for detecting air conditioner local environment, obtain indoor
Temperature and inner tube temperature corresponding with indoor temperature.The temperature difference of indoor temperature and inner tube temperature is calculated, that is, calculating indoor temperature
The temperature difference of inner tube temperature corresponding with indoor temperature, obtains first temperature difference.Preferably, after compressor start operation, often
The temperature difference of indoor temperature and inner tube temperature corresponding with indoor temperature is calculated when preset time period, is obtained every preset time period
When first temperature difference, such as, preset time period is 1 minute, either 30 seconds or 2 minutes, then every 1 minute, or 30 seconds,
Or 2 minutes temperature difference for calculating indoor temperature and inner tube temperature corresponding with indoor temperature, obtain every 1 minute, or 30 seconds,
Or first temperature difference at 2 minutes.
Specifically, when air conditioner is in refrigeration mode, first temperature difference is subtracted for indoor temperature obtained by inner tube temperature
Difference, when air conditioner is in heating mode, first temperature difference subtracts the obtained difference of indoor temperature for inner tube temperature.
Step S106, calculates the difference of first temperature difference and fiducial temperature, obtains second temperature difference, wherein, fiducial temperature be
The temperature difference of predetermined time indoor temperature and inner tube temperature.
Alternatively, predetermined time includes the initial launch moment of compressor.Compressor was obtained at the initial launch moment
The indoor temperature of the air conditioner local environment detected and inner tube temperature corresponding with indoor temperature, calculate indoor temperature at this time
With the temperature difference of inner tube temperature, the first temperature difference △ T are obtained0, fiducial temperature includes this first temperature difference △ T0.After compressor operating,
Continuous detection is every the indoor temperature of the air conditioner local environment in the first preset time period and the compressor of air conditioner respectively
Inner tube temperature, calculates the first temperature difference △ T1i, wherein, i is every the i-th moment in the first preset time period.Obtain every the
The first temperature difference △ T in one preset time period1iWith fiducial temperature △ T0Difference, obtain multiple second temperature difference △ T1i-△T0, lead to
Cross more multiple second temperature difference △ T1i-△T0It can obtain multiple second temperature difference △ T1i-△T0Minimum value T1。
First temperature difference when the first preset time period is obtained, according to fiducial temperature △ T0It can obtain pre- every first
If second temperature difference during period, alternatively, first temperature difference △ T of the compressor operating afterwards when 1 minute is obtained11, calculate
First temperature difference △ T11With fiducial temperature △ T0Difference, second temperature difference when 1 minute is obtained, that is, △ T11-△T0Gained
The value arrived.
Alternatively, predetermined time further includes the normal operation moment of compressor.Compressor is in the jth at normal operation moment
Quarter detects the indoor temperature of air conditioner local environment and inner tube temperature corresponding with indoor temperature, and the first temperature difference △ is calculated
Tj, fiducial temperature includes this first temperature difference △ Tj。
First temperature difference when the second preset time period is obtained, alternatively, the second preset time period is 30 seconds, obtains pressure
The first temperature difference △ T after contracting machine normal operation from the jth moment when 30 secondsj+1, calculate the first temperature difference △ Tj+1With default temperature
Poor △ TjDifference, obtain every the second preset time period be 30 seconds when the second temperature difference △ Tj+1-△Tj.Obtain pre- every the 3rd
If first temperature difference of period, alternatively, the 3rd preset time period is 2 minutes, obtains the jth moment after compressor normal operation
The first temperature difference △ T when rising at intervals of two minutesj+4, calculate the first temperature difference △ Tj+4With fiducial temperature △ TjDifference, obtain every
Second temperature difference when three preset time periods are 2 minutes, alternatively, second temperature difference when the 3rd preset time period is 2 minutes
For △ Tj-△Tj+4。
Alternatively, the indoor temperature and air conditioner of the air conditioner local environment in the 3rd preset time period are continuously detected respectively
Compressor inner tube temperature, calculate first temperature difference, obtain first temperature difference and the 3rd preset time in the 3rd preset time period
Multiple differences of the fiducial temperature of section, obtain multiple second temperature difference, obtain the minimum value T of multiple second temperature difference2。
Step S108, judges whether compressor overload protection occurs according to second temperature difference.
Second temperature difference when preset time period is obtained, alternatively, obtains the second temperature difference △ T when 1 minute11-
△T0.According to judging multiple second temperature difference △ T in step S1061i-△T0Minimum value T1, judge △ T11-△T0With T1It is whether full
Sufficient △ T11-△T0≥T1The first preset condition.As △ T11-△T0≥T1During establishment, then obtain at the i-th moment subsequently every the
The second temperature difference △ T when two preset time periods are 30 secondsj+1-△Tj, i and j refer to synchronization herein.Judge △ Tj+1-△TjWith 0
DEG C whether meet △ Tj+1-△TjThe second preset condition of 0 DEG C of ＞, meanwhile, obtain subsequently every the 3rd preset time period be 2 points
The second temperature difference △ T during clockj-△Tj+4, judge △ Tj-△Tj+4With T2Whether △ T is metj-△Tj+4≥T2The 3rd default article
Part, alternatively, T2To be second temperature difference of minimum in 2 minutes every the 3rd preset time period.If the first preset condition into
After vertical, the second preset condition and the 3rd preset condition also meet at the same time, then may determine that compressor has occurred
Overload protection.
Second temperature difference of the embodiment of the present invention can be calculated in multiple periods, judge every the first preset time period
When second temperature difference whether meet the first preset condition, if it is judged that second temperature difference when the first preset time period meets
First preset condition, judge second temperature difference when the second preset time period whether meet the second preset condition and judge every
Whether second temperature difference during three preset time periods meets the 3rd preset condition, if it is judged that when the second preset time period
Second temperature difference meet the second preset condition and second temperature difference when three preset time periods meets the 3rd preset condition, then
Determine that overload protection occurs in compressor, whether the first preset condition is met by second temperature difference in different time periods, second is default
Condition and the 3rd preset condition are it is achieved thereby that overload of compressor protects feedback function.
Step S110, if it is judged that when overload protection occurs in compressor, control compressor is out of service.
If it is judged that overload protection occurs in compressor, after control compressor is out of service, air conditioner is controlled first
Outdoor fan shut down, the pattern for then judging air conditioner is refrigeration mode or heating mode, if it is judged that at air conditioner
In refrigeration mode, it is necessary to reach refrigeration effect, then the indoor fan start of air conditioner is controlled, is blown a cold wind over, if it is judged that air-conditioning
Device is in heating mode, it is necessary to reach heating effect, then controls the indoor fan of air conditioner to shut down, avoid blowing a cold wind over, so as to keep away
After having exempted from compressor operating stopping, indoor fan and outdoor fan remain in operation, and blow a cold wind over, carry when needing heating effect
The comfort that high air conditioner uses.
After overload protection occurs in definite compressor, compressor is out of service, and air conditioner can control compressor to open again
It is dynamic.Overload protection often occurs for compressor, that is, often carrying out once out of service and starting operation, then air conditioner statistics is pressed
Then contracting machine judges that the number that overload protection occurs in compressor is from starting to work to currently occurring the number of overload protection altogether
It is no to reach preset times, wherein, preset times is allow compressor most numbers of overload protection occur, if it is judged that compression
The number that overload protection occurs in machine has reached pre- and sets number, then output can serve to indicate that the failure letter that compressor breaks down
Number.
The fault-signal of compressor can be optional exporting prompt message in a manner of prompting uncompression machine failure
Ground, prompt message are shutdown prompt message, such as：The prompt message of " system work at present is abnormal, will shut down ", shutdown prompting
Information can perform air conditioner shutdown processing, and operation irregularity can refer to the number that overload protection occurs in compressor and reach herein
Preset times.Prompt message can also be break prompt information, such as, the prompting of " system work at present is abnormal, will power off "
Information, the working performance for avoiding the compressor for having occurred and that failure further deteriorate, and influence the working condition of air conditioner.Prompting
Information can also be the prompt message of conversion operation pattern, such as：" system work at present is abnormal, that is, is converted into safe mode "
Prompt message, for prompting to change the operational mode of air conditioner, for example safe mode is refrigeration mode, heating mould
Conversion between formula, dehumidification mode and air supply pattern, it is ensured that compressor operating avoids pressure under the safe mode of air conditioner
Contracting machine frequently occurs overload protection, reduces compressor and the possibility that overload protection easily triggers system pipeline booster occurs.
After compressor exports fault-signal, compressor is by performing air conditioner power-off, shutdown or conversion operation
The operation of pattern carrys out the failure of uncompression machine, works normally compressor.
The overload of compressor protection control method of the embodiment is using the indoor temperature and sky for detecting air conditioner local environment
The temperature of the inner tube of the compressor of device is adjusted, the temperature difference of the temperature of indoor temperature and inner tube is then calculated, obtains first temperature difference, then count
Calculate the difference of first temperature difference and fiducial temperature, obtain second temperature difference, wherein, fiducial temperature be predetermined time indoor temperature with it is interior
The temperature difference of the temperature of pipe, finally judges whether compressor overload protection occurs according to second temperature difference, if it is judged that compressor goes out
During existing overload protection, control compressor is out of service.When judging that the number that overload protection occurs in compressor reaches preset times,
Then output can serve to indicate that the fault-signal that compressor breaks down, and by performing power-off, shutdown to air conditioner or turning
Change operational mode and carry out the failure of uncompression machine, easily trigger system pipeline booster so as to reduce compressor and overload protection occurs
Possibility.
Fig. 2 is the flow chart of overload of compressor protection control method according to a second embodiment of the present invention.Need what is illustrated
It is that the overload of compressor protection control method of the embodiment can be as the preferred embodiment of first embodiment of the invention, such as Fig. 2
Shown, overload of compressor protection control method comprises the following steps：
Step S202, detects the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner.
The indoor temperature of continuous detection air conditioner local environment and corresponding respectively after the compressor operating of air conditioner
The inner tube temperature of the compressor of air conditioner.After compression start operation, every preset time period to the air-conditioning that has been detected by
The indoor temperature of device local environment and the inner tube temperature of the compressor of air conditioner are sampled, such as, preset time period is 1 point
Clock, either 30 seconds or 2 minutes, then every 1 minute, either 30 seconds or 2 minutes Indoor Temperatures to air conditioner local environment
Degree and inner tube temperature corresponding with the indoor temperature of air conditioner local environment are sampled, and are obtained when 1 minute, or 30 seconds
When, or the indoor temperature of air conditioner local environment and inner tube corresponding with the indoor temperature of air conditioner local environment at 2 minutes
Temperature.
The temperature difference of indoor temperature and inner tube temperature is calculated, obtains first temperature difference.
Step S204, △ T were detected after start operation every 1 minute11-△T0≥T1。
In this step, △ T11For first temperature difference after compressor operating every 1 minute when, △ T0It is compressor first
The fiducial temperature of time of running beginning, T1For every in first temperature difference and multiple differences of fiducial temperature in the first preset time period
Minimum value.
First temperature difference when the first preset time period is obtained, according to fiducial temperature △ T0It can obtain pre- every first
If second temperature difference during period, alternatively, first temperature difference △ T of the compressor operating afterwards when 1 minute is obtained11, calculate
First temperature difference △ T11With fiducial temperature △ T0Difference, second temperature difference when 1 minute is obtained, that is, △ T11-△T0Gained
The value arrived.Judge △ T11-△T0With T1Whether △ T is met11-△T0≥T1The first preset condition.If meet the first default bar
Part, then perform step S206, otherwise, performs step S202, detects the indoor temperature of air conditioner local environment and the pressure of air conditioner
The inner tube temperature of contracting machine.
Step S206, subsequently detected △ T every 30 secondsj+1-△Tj0 DEG C of ＞ and △ is subsequently detected at intervals of two minutes
Tj-△Tj+4≥T2。
In this step, △ Tj+1For first temperature difference from the jth moment after compressor normal operation every 30 seconds when, △
TjFor first temperature difference at jth moment, that is, fiducial temperature, △ Tj+4For from the jth moment after compressor normal operation every 2 points
First temperature difference during clock, T2For every the minimum value of multiple differences of first temperature difference and fiducial temperature in the 3rd preset time period.
First temperature difference and fiducial temperature △ T when after judging compressor operating every 1 minute0Difference meet △
T11-△T0≥T1If being the jth moment of compressor operating at this time, after the jth moment, the first temperature when 30 seconds is obtained
Poor △ Tj+1, calculate the first temperature difference △ Tj+1With fiducial temperature △ TjDifference, obtain every the second preset time period be 30 seconds when
The second temperature difference △ Tj+1-△Tj, and the first temperature difference △ when obtaining after compressor normal operation from the jth moment at intervals of two minutes
Tj+4, calculate the first temperature difference △ Tj+4With fiducial temperature △ TjDifference, obtain the when the 3rd preset time period is 2 minutes
Two temperature difference, alternatively, second temperature difference when the 3rd preset time period is 2 minutes is △ Tj-△Tj+4, while judge △
Tj+1-△TjWhether △ T is metj+1-△TjThe second preset condition of ＞ 0, △ Tj-△Tj+4Whether △ T is metj-△Tj+4≥T2's
3rd preset condition, if the secondth preset condition and the 3rd preset condition are set up at the same time, performs step S208.Otherwise, hold
Row step S202, detects the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner.
Step S208, determines that overload protection occurs for compressor.
When judging △ Tj+1-△TjMeet △ Tj+1-△TjThe second preset condition of ＞ 0, and △ Tj-△Tj+4Meet △
Tj-△Tj+4≥T2The 3rd preset condition, then can determine that there occurs overload protection for compressor.
After overload protection occurs for definite compressor, control compressor is out of service, and alternatively, compressor can pass through
A.C. contactor is disconnected further to control compressor out of service.If air conditioner is in refrigeration mode, indoor fan is opened
Machine, if air conditioner is in heating mode, indoor fan is shut down, meanwhile, control outdoor fan is shut down, so as to avoid compression
After machine operation stops, indoor fan and outdoor fan remain in operation, and occur situation about blowing a cold wind over when needing heating effect, improve
The comfort that air conditioner uses.
The embodiment is using the indoor temperature for detecting air conditioner local environment and the inner tube temperature of the compressor of air conditioner, meter
The temperature difference of indoor temperature and inner tube temperature is calculated, obtains first temperature difference, then detected △ every 1 minute after detection start operation
T11-△T0≥T1, and subsequently △ T were detected every 30 secondsj+1-△Tj0 DEG C of ＞, is subsequently detecting △ T at intervals of two minutesj-△
Tj+4≥T2, then compressor can be determined there occurs overload protection, easily triggered so as to reduce compressor and overload protection occurs and be
The possibility of road booster under the overall leadership.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
Performed in computer system, although also, show logical order in flow charts, in some cases, can be with not
The order being same as herein performs shown or described step.
Present invention also offers a kind of overload of compressor protection control device, it is necessary to explanation, the compression of the embodiment
Machine overload protection controlling device can be used for the overload of compressor protection control method for performing the embodiment of the present invention.
Fig. 3 is the schematic diagram of overload of compressor protection control device according to a first embodiment of the present invention.As shown in figure 3,
The device includes：Detection unit 10, the first computing unit 20, the second computing unit 30, the first judging unit 40 and control unit
50。
Detection unit 10, the temperature of the inner tube for detecting the indoor temperature of air conditioner local environment and the compressor of air conditioner
Degree.After the compressor operating of air conditioner, detection unit 10 detects the indoor temperature and air-conditioning of air conditioner local environment respectively
The inner tube temperature of the compressor of device, alternatively, detection unit 10 respectively the indoor temperature of continuous detection air conditioner local environment and
The inner tube temperature of the inner tube temperature of the compressor of air conditioner, the indoor temperature of air conditioner local environment and the compressor of air conditioner exists
There is one-to-one relation at different moments.Preferably, after compression start operation, every preset time period to detection unit
The indoor temperature of the 10 air conditioner local environments having been detected by and the inner tube temperature of the compressor of air conditioner are sampled, and are obtained
The inner tube temperature of the compressor of the indoor temperature of air conditioner local environment and air conditioner when preset time period.
First computing unit 20, the temperature difference of the temperature for calculating indoor temperature and inner tube, obtains first temperature difference.Detecting
After unit 10 detects the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of air conditioner, indoor temperature is obtained
Inner tube temperature corresponding with indoor temperature, the first computing unit 20 calculate the temperature difference of indoor temperature and inner tube temperature, that is, the
One computing unit 20 calculates the temperature difference of indoor temperature and inner tube temperature corresponding with indoor temperature, obtains first temperature difference.Preferably,
Compressor start operation after, the first computing unit 20 calculated when preset time period indoor temperature and with indoor temperature pair
The temperature difference for the inner tube temperature answered, obtains first temperature difference when preset time period.
Specifically, when air conditioner is in refrigeration mode, first temperature difference that the first computing unit 20 calculates is indoor temperature
The obtained difference of inner tube temperature is subtracted, when air conditioner is in heating mode, first temperature difference that the first computing unit 20 calculates is interior
Tube temperature degree subtracts the obtained difference of indoor temperature.
Second computing unit 30, for calculating the difference of first temperature difference and fiducial temperature, obtains second temperature difference, wherein, in advance
If the temperature difference is the temperature difference in predetermined time indoor temperature and the temperature of inner tube.Alternatively, predetermined time includes the initial of compressor
The time of running.Compressor obtains the indoor temperature of air conditioner local environment and corresponding with indoor temperature at the initial launch moment
Inner tube temperature, the first computing unit 20 calculate the temperature difference of indoor temperature and inner tube temperature at this time, obtain the first temperature difference △ T0, in advance
If the temperature difference includes this first temperature difference △ T0.After compressor operating, continuous detection is default every first respectively for detection unit 10
The inner tube temperature of the indoor temperature of air conditioner local environment in period and the compressor of air conditioner, the first computing unit 20 are counted
Calculate the first temperature difference △ T1i, wherein, i is every the i-th moment in the first preset time period.Second computing unit 30 calculate every
The first temperature difference △ T in first preset time period1iWith fiducial temperature △ T0Difference, obtain multiple second temperature difference △ T1i-△T0,
Pass through more multiple second temperature difference △ T1i-△T0It can obtain multiple second temperature difference △ T1i-△T0Minimum value T1。
First computing unit 20 calculates first temperature difference when the first preset time period, according to fiducial temperature △ T0Can be with
Second temperature difference when the first preset time period is obtained, it is alternatively, every after the first computing unit 20 calculating compressor operating
The first temperature difference △ T when 1 minute11, the first temperature difference △ T of the second computing unit 30 calculating11With fiducial temperature △ T0Difference, obtain
To second temperature difference every 1 minute when, that is, △ T11-△T0Obtained value.
Alternatively, predetermined time includes the normal operation moment of compressor.Detection unit 10 is in compressor normal operation
The jth moment at quarter detects the indoor temperature of air conditioner local environment and inner tube temperature corresponding with indoor temperature, and first calculates
The first temperature difference △ T are calculated in unit 20j, fiducial temperature includes this first temperature difference △ Tj。
First temperature difference when the second preset time period is obtained, alternatively, the second preset time period is 30 seconds, obtains pressure
The first temperature difference △ T after contracting machine normal operation from the jth moment when 30 secondsj+1, the second computing unit 30 first temperature difference of calculating
△Tj+1With fiducial temperature △ TjDifference, obtain every the second preset time period be 30 seconds when the second temperature difference △ Tj+1-△Tj。
First temperature difference every the 3rd preset time period is obtained, alternatively, the 3rd preset time period is 2 minutes, and it is normal to obtain compressor
After operation from the jth moment at intervals of two minutes when the first temperature difference △ Tj+4, the first temperature difference △ T of the second computing unit 30 calculatingj+4With
Fiducial temperature △ TjDifference, obtain every the 3rd preset time period be 2 minutes when second temperature difference, alternatively, every the 3rd
Second temperature difference when preset time period is 2 minutes is △ Tj-△Tj+4。
Detection unit 10 continuously detects the indoor temperature and sky of the air conditioner local environment in the 3rd preset time period respectively
The inner tube temperature of the compressor of device is adjusted, the first computing unit 20 calculates first temperature difference, and the second computing unit 30 calculates pre- the 3rd
If multiple differences of first temperature difference and fiducial temperature in the period, multiple second temperature difference are obtained, obtain multiple second temperature difference most
Small value T2。
First judging unit 40, for judging whether compressor overload protection occurs according to second temperature difference.Second temperature difference exists
It is calculated in multiple periods, wherein, the first judging unit 40 includes：First judgment module, can judge mould by first
Block judges whether second temperature difference when the first preset time period meets the first preset condition.Second judgment module, Ke Yitong
Cross second temperature difference of second judgment module when judging every the first preset time period and meet the first preset condition, judge every
Whether second temperature difference during the second preset time period meets the second preset condition and judges when three preset time periods
Whether two temperature difference meet the 3rd preset condition；Determining module, can judged every the second preset time by determining module
Second temperature difference during section meets the second preset condition and second temperature difference when three preset time periods meets the 3rd default article
Part, determines that overload protection occurs in compressor.
Second computing unit 30 obtains second temperature difference when preset time period, alternatively, obtains when 1 minute
Second temperature difference △ T11-△T0.Multiple second temperature difference △ T being calculated according to the second computing unit 301i-△T0Minimum value
T1, the first judgment module judges △ T11-△T0With T1Whether △ T is met11-△T0≥T1The first preset condition.As △ T11-△
T0≥T1During establishment, then the second computing unit 30 is calculated in second of the i-th moment subsequently when the second preset time period is 30 seconds
Temperature difference △ Tj+1-△Tj, i and j refer to synchronization herein.Second judgment module judges △ Tj+1-△TjWhether meet △ with 0 DEG C
Tj+1-△TjThe second preset condition of 0 DEG C of ＞, meanwhile, 30 calculated for subsequent of the second computing unit is 2 every the 3rd preset time period
The second temperature difference △ T during minutej-△Tj+4, the 3rd judgment module judges △ Tj+4-△TjWith T2Whether △ T is metj-△Tj+4≥T2
The 3rd preset condition, alternatively, T2To be second temperature difference of minimum in 2 minutes every the 3rd preset time period.If
After one preset condition is set up, the second preset condition and the 3rd preset condition also meet at the same time, it is determined that module can be determined
Has there is overload protection in compressor.
Control unit 50, for when judging that overload protection occurs in compressor, control compressor to be out of service.It is preferred that
Ground, which includes detection unit, for detecting the operational mode of air conditioner.Judging that overload protection occurs in compressor, controlling
After compressor processed is out of service, control unit 50 also controls the outdoor fan of air conditioner to shut down.Sky is detected in detection unit
When tune device is in refrigeration mode, control unit 50 also controls the indoor fan of air conditioner to start shooting, and air-conditioning is detected in detection unit
When device is in heating mode, control unit 50 also controls the indoor fan of air conditioner to shut down, and stops so as to avoid compressor operating
After only, indoor fan and outdoor fan remain in operation, and when needing heating effect, situation about blowing a cold wind over occur, improve air-conditioning
The comfort that device uses.
Fig. 4 is the schematic diagram of overload of compressor protection control device according to a second embodiment of the present invention.The present invention's
In one embodiment, which includes：Statistic unit 60, the second judging unit 70 and output unit 80.As shown in figure 4, the pressure
Contracting machine overload protection controlling device includes：Detection unit 10, the first computing unit 20, the second computing unit 30, first judges list
Member 40, control unit 50, statistic unit 60, the second judging unit 70 and output unit 80.
, there is the number of overload protection for counting compressor in statistic unit 60.
Second judging unit 70, for judging whether the number that overload protection occurs in compressor reaches preset times.
Output unit 80, for judging that the number that overload protection occurs in compressor reaches preset times, exports failure
Signal, wherein, fault-signal is used to indicate that compressor breaks down.
For the embodiment of the present invention after overload protection occurs in definite compressor, compressor is out of service, and air conditioner can control
Compressor is again started up.Overload protection often occurs for compressor, that is, often carrying out once out of service and starting operation, then
Statistic unit 60 counts compressor from starting to work to currently occurring the number of overload protection altogether, then the second judging unit 70
Judge whether the number that overload protection occurs in compressor reaches preset times, wherein, preset times occurred for permission compressor
Most numbers of protection are carried, if the second judging unit 70 judges that the number that overload protection occurs in compressor reaches default time
Number, the then output of output unit 80 can serve to indicate that the fault-signal that compressor breaks down.
Fig. 5 is the schematic diagram of overload of compressor protection control device according to a third embodiment of the present invention.The present invention's
In one embodiment, overload of compressor protection control device includes：Lifting unit 90.As shown in figure 5, the device includes：Inspection
Survey unit 10, the first computing unit 20, the second computing unit 30, the first judging unit 40, control unit 50, statistic unit 60,
Second judging unit 70, output unit 80 and lifting unit 90.
Lifting unit 90, for releasing fault-signal by performing any one following operation to air conditioner：Power-off, shutdown
Or conversion operation pattern.After the fault-signal that 80 output indication compressor of output unit breaks down, lifting unit 90
By being powered off, being shut down to air conditioner or the operation of conversion operation pattern is come the failure of uncompression machine, so that compression
Machine recovers normal work.
Alternatively, the air conditioner in the overload of compressor protection control device in the embodiment is air-conditioner with fixed frequency.When fixed
When overload protection occurs in frequency air conditioner, control unit 50 controls the outdoor fan of air-conditioner with fixed frequency to shut down, if air-conditioner with fixed frequency
In refrigeration mode, control unit 50 controls the indoor fan start of air-conditioner with fixed frequency, if air conditioner is in heating mode, control
Unit 50 processed controls the indoor fan of air-conditioner with fixed frequency to shut down, so as to avoid compressor it is out of service after, air-conditioner with fixed frequency
Indoor fan and outdoor fan remain in operation, need heating when there is the phenomenon blown a cold wind over, improve what air conditioner used
Comfort.Air-conditioner with fixed frequency can count compressor by statistic unit 60 and the number of overload protection occurs, judge by second
Unit 70 judges whether the number that overload protection occurs in compressor has reached preset times, if the second judging unit 70 is judged
The number that overload protection occurs in the compressor of air-conditioner with fixed frequency reaches preset times, it is determined that the compressor for going out air-conditioner with fixed frequency goes out
Existing failure, at this time, air-conditioner with fixed frequency cisco unity malfunction is in refrigeration mode or heating mode.Air-conditioner with fixed frequency passes through output again
Unit 80 exports fault-signal instruction compressor and breaks down, can be disconnected by being performed to air-conditioner with fixed frequency by lifting unit 90
Electricity, shutdown or the operation of conversion operation pattern carry out the failure of uncompression machine, avoid high frequent and overload protection occur
And causing system pipeline frequently to be impacted be subject to pulse, the compressor for realizing air-conditioner with fixed frequency is fed back with overload protection
Function, so that the main control computer of air-conditioner with fixed frequency can receive the overload protection information of compressor, overloads compressor
The possibility that overload protection easily triggers system pipeline booster occurs for protection, the compressor for reducing air-conditioner with fixed frequency.
The overload of compressor protection control device of the embodiment of the present invention detects air conditioner local environment by detection unit 10
Indoor temperature and air conditioner compressor inner tube temperature, then by the first computing unit 20 calculate indoor temperature with it is interior
The temperature difference of the temperature of pipe, obtains first temperature difference, then the difference of first temperature difference and fiducial temperature is calculated by the second computing unit 30,
Second temperature difference is obtained, wherein, fiducial temperature is the temperature difference in predetermined time indoor temperature and the temperature of inner tube, is judged by first
Unit 40 judges whether compressor overload protection occurs according to second temperature difference, is judging compressor finally by control unit 50
When there is overload protection, control compressor is out of service, easily triggers system pipes so as to reduce compressor and overload protection occurs
The possibility of road booster.
The embodiment of the present invention additionally provides a kind of air conditioner, the air conditioner can be air-conditioner with fixed frequency, it is necessary to explanation,
The air conditioner of the embodiment of the present invention can be used for the overload of compressor protection control device for performing the embodiment of the present invention, can also hold
The overload of compressor protection control method of the row embodiment of the present invention.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Performed in the storage device by computing device, either they are fabricated to respectively each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention be not restricted to it is any specific
Hardware and software combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of overload of compressor protects control method, it is characterised in that including：
Detect the indoor temperature of air conditioner local environment and the inner tube temperature of the compressor of the air conditioner；
The temperature difference of the indoor temperature and said inner tube temperature is calculated, obtains first temperature difference；
The difference of first temperature difference and fiducial temperature is calculated, obtains second temperature difference, wherein, the fiducial temperature is when default
Carve the temperature difference of the indoor temperature and said inner tube temperature；
Judge whether the compressor overload protection occurs according to second temperature difference；And
If it is judged that when overload protection occurs in the compressor, control the compressor out of service；
Wherein, second temperature difference is calculated within multiple periods, judges that the compressor is according to second temperature difference
No there is overload protection and include：
Judge whether second temperature difference when the first preset time period meets the first preset condition；
If it is judged that second temperature difference when the first preset time period meets first preset condition, judge every
Whether second temperature difference during the second preset time period meets the second preset condition and judges when three preset time periods
Whether two temperature difference meet the 3rd preset condition；And
If it is judged that second temperature difference when the second preset time period meets second preset condition and every
Second temperature difference during three preset time periods meets the 3rd preset condition, determines that overload protection occurs in the compressor.
2. according to the method described in claim 1, it is characterized in that, after there is overload protection in the definite compressor, institute
The method of stating further includes：
Count the compressor and the number of overload protection occur；
Judge whether the number that overload protection occurs in the compressor reaches preset times；And
If it is judged that the number that overload protection occurs in the compressor reaches the preset times, fault-signal is exported, wherein,
The fault-signal is used to indicate that the compressor breaks down.
3. according to the method described in claim 2, it is characterized in that, the fault-signal can be by performing the air conditioner
Any one operation is released below：
Power-off, shutdown or conversion operation pattern.
4. according to the method described in claim 1, it is characterized in that, if it is judged that there is overload protection in the compressor, control
Make the compressor it is out of service after, the method further includes：
Detect the operational mode of the air conditioner；And
The outdoor fan of the air conditioner is controlled to shut down,
When detecting that the air conditioner is in refrigeration mode, the indoor fan of the air conditioner is controlled to start shooting, detecting
When stating air conditioner and being in heating mode, the indoor fan of the air conditioner is controlled to shut down.
5. a kind of overload of compressor protects control device, it is characterised in that including：
Detection unit, for detecting the inner tube temperature of the indoor temperature of air conditioner local environment and the compressor of the air conditioner；
First computing unit, for calculating the temperature difference of the indoor temperature and said inner tube temperature, obtains first temperature difference；
Second computing unit, for calculating the difference of first temperature difference and fiducial temperature, obtains second temperature difference, wherein, it is described
Fiducial temperature is the temperature difference in indoor temperature described in predetermined time and said inner tube temperature；
First judging unit, for judging whether the compressor overload protection occurs according to second temperature difference；
And
Control unit, for when judging that overload protection occurs in the compressor, controlling the compressor out of service；
Wherein, second temperature difference is calculated within multiple periods, and first judging unit includes：
First judgment module, for judging whether second temperature difference when the first preset time period meets the first preset condition；
Second judgment module, for if it is judged that second temperature difference when the first preset time period meets described first
Preset condition, judges whether second temperature difference when the second preset time period meets the second preset condition and judge every the 3rd
Whether second temperature difference during preset time period meets the 3rd preset condition；And
Determining module, for judge it is described every the second preset time period when second temperature difference meet the described second default bar
Part and second temperature difference when three preset time periods meets the 3rd preset condition, determines that the compressor overloads
Protection.
6. device according to claim 5, it is characterised in that described device further includes：
, there is the number of overload protection for counting the compressor in statistic unit；
Second judging unit, for judging whether the number that overload protection occurs in the compressor reaches preset times；
And
Output unit, for judging that the number that overload protection occurs in the compressor reaches the preset times, output therefore
Hinder signal, wherein, the fault-signal is used to indicate that the compressor breaks down.
7. device according to claim 6, it is characterised in that described device further includes：
Lifting unit, for releasing fault-signal by performing any one following operation to air conditioner：
Power-off, shutdown or conversion operation pattern.
8. device according to claim 5, it is characterised in that described device further includes：
Detection unit, for detecting the operational mode of the air conditioner,
Wherein, described control unit is used to control the outdoor fan of the air conditioner to shut down, and is detecting that the air conditioner is in
During refrigeration mode, the indoor fan of the air conditioner is controlled to start shooting, when detecting that the air conditioner is in heating mode, control
The indoor fan of the air conditioner is shut down.
9. a kind of air conditioner, it is characterised in that protect control including the overload of compressor any one of claim 5 to 8
Device.
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| CN106150999B (en) * | 2016-07-04 | 2018-02-16 | 珠海格力电器股份有限公司 | Overload of compressor protection detection, the method and device of control |
| CN109442674B (en) * | 2018-11-01 | 2020-11-13 | Tcl空调器(中山)有限公司 | Air conditioner compressor protection method, equipment, device, storage medium and air conditioner |
| CN110595015B (en) * | 2019-09-25 | 2020-12-11 | 珠海格力电器股份有限公司 | Adjusting method and device of frequency conversion equipment |
| CN114216201B (en) * | 2021-12-02 | 2024-03-22 | 珠海格力电器股份有限公司 | Control method of fixed-frequency air conditioner and fixed-frequency air conditioner |
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