CN105004008B - Convertible frequency air-conditioner low-temperature starting control method, control system and its air conditioner - Google Patents
Convertible frequency air-conditioner low-temperature starting control method, control system and its air conditioner Download PDFInfo
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- CN105004008B CN105004008B CN201510427687.1A CN201510427687A CN105004008B CN 105004008 B CN105004008 B CN 105004008B CN 201510427687 A CN201510427687 A CN 201510427687A CN 105004008 B CN105004008 B CN 105004008B
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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
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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
- F24F11/62—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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/59—Remote control for presetting
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Abstract
The present invention relates to convertible frequency air-conditioner low-temperature starting control method, control system and its air conditioner.Comprise the following steps：Control main transformer frequency compressor frequency rises to predeterminated frequency Fa1；Judge whether convertible frequency air-conditioner needs preheating, if it is not, then continuing regular boot up sequence；If desired preheat, then control main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and be maintained at Fa3 stable operations；Other compressors are opened successively simultaneously, control other compressor frequencies to be maintained at Fa3 stable operations；Judge whether to terminate warm, if terminating warm, control main frequency-changeable compressor and other compressors to continue to run with or directly close.The invention provides a kind of preheating starting method suitable for low-temperature heating; it ensure that convertible frequency air-conditioner at low ambient temperatures; it still can normally, stably, quickly preheat and startup is heated; not only improve and heat speed; and have protective effect to compressor, improve the service life and user's usage comfort of convertible frequency air-conditioner.
Description
Technical field
The present invention relates to airconditioning control field, more particularly to a kind of convertible frequency air-conditioner low-temperature starting control method, control system
And its air conditioner.
Background technology
In recent years, there is increasingly colder trend in China's weather, and constantly refresh lowest temperature record for national each province, persistently low
Temperature makes energy industry meet with crisis again and again, is that heat supply in winter problem proposes acid test, at the same time, also have stimulated market
To the demand of low-temperature heating air conditioner, low-temperature heating by be air-conditioning market develop inexorable trend.It is well known that ultra-low temperature surroundings are not
The heating effect of air-conditioning is only influenceed, and easily consumes the excessive energy, some air-conditionings even can not be just when temperature is especially low
Often start.General heat pump type air conditioning system cold-starting process, in terms of compressor start with conventional heating start substantially without
Difference, i.e., open compressor according to ability need.Cryogenic refrigeration generally has when heating startup the preheating of system refrigerant slow etc.
Technological difficulties, due to refrigerant under low temperature and oily sticky increase, flowing is sluggish, and it is whole that usual startup needs longer time just to make
The refrigerant circulation of individual system gets up, so that indoor set realizes that refrigerating/heating effect is slower, especially for containing multiple pressures
The outer machine system of contracting machine, when indoor unit capability demand only requires the single compressor of one outer machine of unlatching, starts especially slow.
The content of the invention
The technical problems to be solved by the invention be to provide a kind of convertible frequency air-conditioner low-temperature starting control method, control system and
Its air conditioner, solves during prior art air-conditioning system cold-starting, starts slow technical problem.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of convertible frequency air-conditioner low-temperature starting control method, bag
Include following steps：
Step 1, gather and judge parameter and for judging whether to terminate preheating for judging whether to the first of preheating
Second judges parameter；
Step 2, the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises to first frequency Fa1 set in advance；
Step 3, judge parameter according to described first, judge whether convertible frequency air-conditioner needs preheating, need not such as preheat, then become
Frequency air-conditioning continues regular boot up sequence；If desired for preheating, then into step 4；
Step 4, control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keep pre-heat frequency Fa3 stable
Operation；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；
Step 5, judge that parameter judges whether to terminate warm according to described second, if terminating warm, basis
Indoor unit capability demand, controls main frequency-changeable compressor and other compressors to continue to run with or directly close.
The beneficial effects of the invention are as follows：The invention provides a kind of preheating starting method suitable for low-temperature heating, it is ensured that
Convertible frequency air-conditioner at low ambient temperatures, still can normally, stably, quickly preheating and startup heat, not only improve and heat speed
Degree, and have protective effect to compressor, improve the service life and user's usage comfort of convertible frequency air-conditioner.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, described first judges that parameter includes air conditioning operating mode, main transformer frequency compressor chamber temperature, preheats and open
Environment temperature and/or main transformer frequency compressor shutdown time before dynamic；Described second judges that parameter includes preheating time and/or main transformer frequency
The discharge superheat of compressor.
Further, in step 3, judge whether the convertible frequency air-conditioner needs preheating to specifically include following steps：
Step 301, the first reference temperature t1 of setting, the first reference time T1, second frequency Fa2 and the second reference temperature
t2；
Step 302, air conditioning operating mode is judged for heating mode or refrigeration mode, if refrigeration mode, then convertible frequency air-conditioner
Continue regular boot up sequence；If heating mode, then four-way valve commutation is controlled, and control the main transformer frequency compressor frequency to decline
To the second frequency Fa2, subsequently into step 303；
Step 303, judge whether the difference of environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating is more than
The first reference temperature t1, if no more than described first reference temperature t1, into step 304；Such as larger than described first ginseng
Temperature t1 is examined, then without warm, the convertible frequency air-conditioner continues regular boot up sequence；
Step 304, the downtime of the frequency-changeable compressor is judged, if less than the first reference time T1, if not
Less than the first reference time T1, then into step 305；If less than the first reference time T1, without preheated
Journey, the convertible frequency air-conditioner continues regular boot up sequence；
Step 305, judge whether environment temperature is more than the second reference temperature t2 before the pipeline start up by preheating, if being not more than
The second reference temperature t2, then into the warm of the step 4；If more than the second reference temperature t2, not entering
Row warm, the convertible frequency air-conditioner continues regular boot up sequence.
Further, first reference time T1 is 30min；When environment temperature is less than 0 DEG C before the pipeline start up by preheating,
The first reference temperature t1 is set to 20 DEG C, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, and described first with reference to temperature
Degree t1 is set to 30 DEG C；The second reference temperature t2 for [- 7 DEG C, 0 DEG C) or [- 15 DEG C, -8 DEG C) arbitrary value in two intervals.
Further, in step 5, judge whether that terminating warm specifically includes following steps：
Step 501, the second reference time T2 and the 3rd reference temperature t3 is set；
Step 502, judge whether preheating time is less than the second reference time T2, if less than the second reference time T2,
Into step 503；If not less than the second reference time T2, terminating warm；
Step 503, judge whether the discharge superheat of the frequency-changeable compressor is less than the 3rd reference temperature t3, if less than institute
The 3rd reference temperature t3 is stated, then proceeds preheating；If not less than the 3rd reference temperature t3, terminating warm；
Step 504,502~503 are repeated the above steps, until warm terminates.
Further, when environment temperature is less than 0 DEG C before the pipeline start up by preheating, second reference time T2 is set to
10min, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, second reference time T2 is set to 7min；When described pre-
When environment temperature is less than 0 DEG C before thermal starting, the 3rd reference temperature t3 is set to 10 DEG C, when environment temperature before the pipeline start up by preheating
When being not less than 0 DEG C, the 3rd reference temperature t3 is set to 15 DEG C.
A kind of convertible frequency air-conditioner cold-starting control system, including acquisition module, control module, pipeline start up by preheating judge module,
Warm-up block and preheating terminate judge module；
The acquisition module is gathered judges parameter and for judging whether to terminate for judging whether to the first of preheating
The second of preheating judges parameter；
The control module is used for before preheating judgement is carried out, and the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises to
First frequency Fa1 set in advance；And after the warm terminates, according to indoor unit capability demand, control main transformer frequency is pressed
Contracting machine and other compressors are continued to run with or directly closed；
The pipeline start up by preheating judge module is used to judge parameter according to described first, judges whether convertible frequency air-conditioner needs pre-
Heat；
The warm-up block is used to control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keeps preheating
Frequency Fa3 stable operations；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；
The preheating, which terminates judge module, to be used to judge that parameter judges whether to terminate warm according to described second.
Further, the pipeline start up by preheating judge module includes the first setup unit, the first judging unit, the first control list
Member, the second judging unit, the 3rd judging unit and the 4th judging unit,
First setup unit is used to set the first reference temperature t1, the first reference time T1, second frequency Fa2 and the
Two reference temperature t2；
First judging unit is used to judge air conditioning operating mode for heating mode or refrigeration mode；
First control unit is used for when air conditioning operating mode is heating mode, control four-way valve commutation, and control
The main transformer frequency compressor frequency drops to the second frequency Fa2；
Second judging unit is used to judge environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating
Whether difference is more than the first reference temperature t1；
3rd judging unit is used to judge whether the downtime of the frequency-changeable compressor to be less than the described first reference
Time T1；
4th judging unit is used to judge before the pipeline start up by preheating whether environment temperature to be more than described second with reference to temperature
Spend t2；
The preheating, which terminates judge module, includes the second setup unit, the 5th judging unit and the 6th judging unit,
Second setup unit is used to set the second reference time T2 and the 3rd reference temperature t3；
5th judging unit is used to judge whether preheating time is less than the second reference time T2；
6th judging unit is used to judge whether the discharge superheat of the frequency-changeable compressor to be less than the 3rd with reference to temperature
Spend t3.
A kind of air conditioner, including the convertible frequency air-conditioner cold-starting control system.
Further, the air conditioner includes a frequency-changeable compressor and a constant speed compressor in parallel；Or one
Frequency-changeable compressor and multiple constant speed compressors in parallel；Or multiple frequency-changeable compressors in parallel, and one of them is main frequency conversion
Compressor.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of convertible frequency air-conditioner low-temperature starting control method of the invention；
Fig. 2 is a kind of schematic flow sheet of convertible frequency air-conditioner low-temperature starting control method step 3 of the invention；
Fig. 3 is a kind of schematic flow sheet of convertible frequency air-conditioner low-temperature starting control method step 5 of the invention；
Fig. 4 is a kind of structural representation of convertible frequency air-conditioner cold-starting control system of the invention；
Fig. 5 is the structural representation of air conditioner of the present invention；
Fig. 6 is the structural representation of the air conditioner of the embodiment of the present invention.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Fig. 1 be a kind of schematic flow sheet of convertible frequency air-conditioner low-temperature starting control method of the invention, as shown in figure 1, including with
Lower step：
Step 1, gather and judge parameter and for judging whether to terminate preheating for judging whether to the first of preheating
Second judges parameter；In the present embodiment, described first judges that parameter includes air conditioning operating mode, main transformer frequency compressor chamber body temperature
Environment temperature and/or main transformer frequency compressor shutdown time before degree, pipeline start up by preheating；Described second judges that parameter includes preheating time
And/or the discharge superheat of main frequency-changeable compressor.
Step 2, the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises to first frequency Fa1 set in advance, described
The frequency of main frequency-changeable compressor rise to first frequency Fa1 raising frequency time by the main frequency-changeable compressor voluntarily the duration of runs and
It is fixed.It is preferred that, the scope of the first frequency Fa1 is 30~60HZ.
Step 3, judge parameter according to described first, judge whether convertible frequency air-conditioner needs preheating, need not such as preheat, then become
Frequency air-conditioning continues regular boot up sequence；If desired for preheating, then into step 4.As shown in Fig. 2 for the present embodiment judge whether into
The schematic flow sheet of row preheating, specifically includes following steps：
Step 301, the first reference temperature t1 of setting, the first reference time T1, second frequency Fa2 and the second reference temperature
t2；
Step 302, air conditioning operating mode is judged for heating mode or refrigeration mode, if refrigeration mode, then convertible frequency air-conditioner
Continue regular boot up sequence；If heating mode, then four-way valve commutation is controlled, and control the main transformer frequency compressor frequency to decline
To the second frequency Fa2, subsequently into step 303；It is preferred that, the scope of the second frequency Fa2 is 20~40HZ；
Step 303, judge whether the difference of environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating is more than
The first reference temperature t1, if no more than described first reference temperature t1, into step 304；Such as larger than described first ginseng
Temperature t1 is examined, then without warm, the convertible frequency air-conditioner continues regular boot up sequence；It is preferred that, the first reference temperature t1
Different values can be set to according to different environment temperature intervals, such as when environment temperature is less than 0 DEG C before the pipeline start up by preheating,
The first reference temperature t1 is set to 20 DEG C, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, and described first with reference to temperature
Degree t1 is set to 30 DEG C；
Step 304, the downtime of the frequency-changeable compressor is judged, if less than the first reference time T1, if not
Less than the first reference time T1, then into step 305；If less than the first reference time T1, without preheated
Journey, the convertible frequency air-conditioner continues regular boot up sequence；It is preferred that, first reference time T1 is set to 30min；
Step 305, judge whether environment temperature is more than the second reference temperature t2 before the pipeline start up by preheating, if being not more than
The second reference temperature t2, then into the warm of the step 4；If more than the second reference temperature t2, not entering
Row warm, the convertible frequency air-conditioner continues regular boot up sequence.It is preferred that, the second reference temperature t2 for [- 7 DEG C, 0 DEG C)
[- 15 DEG C, -8 DEG C) arbitrary value in two intervals, wherein " (", ") " represents not including, " [", "] " represents to include.
Step 4, control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keep pre-heat frequency Fa3 stable
Operation；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；It is preferred that, it is described
Pre-heat frequency Fa3 scope is 50~80HZ.
Step 5, judge that parameter judges whether to terminate warm according to described second, if terminating warm, basis
Indoor unit capability demand, control compressor proceeds to target frequency or directly closed.As shown in figure 3, being the present embodiment
Judge whether the schematic flow sheet for terminating to preheat, specifically include following steps：
Step 501, the second reference time T2 and the 3rd reference temperature t3 is set；
Step 502, judge whether preheating time is less than the second reference time T2, if less than the second reference time T2,
Into step 503；If not less than the second reference time T2, terminating warm；The purpose that T2 is set is guarantee system
Not by the pre- heat affecting long time, it is ensured that it enters normal operating mode as early as possible.It is preferred that, T2 can be according to different environment temperature
Degree is set as below different values, such as 0 DEG C of environment temperature being 10min, and environment temperature more than 0 DEG C (including 0 DEG C) is 7min；
Step 503, judge whether the discharge superheat of the frequency-changeable compressor is less than the 3rd reference temperature t3, if less than institute
The 3rd reference temperature t3 is stated, then proceeds preheating；If not less than the 3rd reference temperature t3, terminating warm；It is excellent
Choosing, t3 can be set as before different values, such as pipeline start up by preheating that environment temperature is less than 0 DEG C according to different environment temperature intervals
When, the 3rd reference temperature t3 is set to 10 DEG C, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, the 3rd ginseng
Examine temperature t3 and be set to 15 DEG C；
Step 504,502~503 are repeated the above steps, until warm terminates.
Fig. 4 is a kind of structural representation of convertible frequency air-conditioner cold-starting control system of the invention, as shown in figure 4, including adopting
Collect module, control module, pipeline start up by preheating judge module, warm-up block and preheating and terminate judge module；
The acquisition module is gathered judges parameter and for judging whether to terminate for judging whether to the first of preheating
The second of preheating judges parameter；
The control module is used for before preheating judgement is carried out, and the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises to
First frequency Fa1 set in advance；And after the warm terminates, according to indoor unit capability demand, control main transformer frequency is pressed
Contracting machine and other compressors are continued to run with or directly closed；
The pipeline start up by preheating judge module is used to judge parameter according to described first, judges whether convertible frequency air-conditioner needs pre-
Heat；
The warm-up block is used to control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keeps preheating
Frequency Fa3 stable operations；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；
The preheating, which terminates judge module, to be used to judge that parameter judges whether to terminate warm according to described second.
In the present embodiment, the pipeline start up by preheating judge module includes the first setup unit, the first judging unit, the first control
Unit, the second judging unit, the 3rd judging unit and the 4th judging unit,
First setup unit is used to set the first reference temperature t1, the first reference time T1 and the second reference temperature
t2；
First judging unit is used to judge air conditioning operating mode for heating mode or refrigeration mode；
First control unit is used for when air conditioning operating mode is heating mode, control four-way valve commutation, and control
The main transformer frequency compressor frequency drops to the second frequency Fa2；
Second judging unit is used to judge environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating
Whether difference is more than the first reference temperature t1；
3rd judging unit is used to judge whether the downtime of the frequency-changeable compressor to be less than the described first reference
Time T1；
4th judging unit is used to judge before the pipeline start up by preheating whether environment temperature to be more than described second with reference to temperature
Spend t2.
In the present embodiment, the preheating terminates judge module and sentenced including the second setup unit, the 5th judging unit and the 6th
Disconnected unit,
Second setup unit is used to set the second reference time T2 and the 3rd reference temperature t3；
5th judging unit is used to judge whether preheating time is less than the second reference time T2；
6th judging unit is used to judge whether the discharge superheat of the frequency-changeable compressor to be less than the 3rd with reference to temperature
T3 is spent, if less than the 3rd reference temperature t3, proceeding preheating；If not less than the 3rd reference temperature t3, tying
Beam warm.
Fig. 5 is the structural representation of air conditioner of the present invention, as shown in figure 5, including the control of above-mentioned convertible frequency air-conditioner cold-starting
System.Fig. 6 is a kind of structural representation of air conditioner of the embodiment of the present invention, eliminates the convertible frequency air-conditioner low-temperature starting in Fig. 6
Autocontrol system, as shown in fig. 6, the air conditioner includes a frequency-changeable compressor and a constant speed compressor in parallel, it is described
Frequency-changeable compressor and constant speed compressor include exhaust outlet and gas returning port respectively, and the frequency-changeable compressor is high pressure cavity compressor；Four
Port valve includes exhaust port, condensation port, evaporator port and air-breathing pipe port, and the exhaust port connects the constant speed respectively
The exhaust outlet of the exhaust outlet of compressor and the variable speed compressor；Outdoor heat exchanger arrival end connects the four-way valve condensation end
Mouthful, the port of export is connected by outdoor expansion valve and is provided with outdoor wind on liquid side stop valve arrival end, the outdoor air cooling heat exchanger
Machine；The liquid side stop valve port of export connects gas side stop valve arrival end by indoor set heat exchanger (being not drawn into figure), described
The gas side stop valve port of export connects the evaporator port of the four-way valve；The air-breathing pipe port connection low-pressure tank of the four-way valve
Arrival end, the port of export of low-pressure tank connects the gas returning port of the frequency-changeable compressor and constant speed compressor respectively.In other embodiment
In, the air conditioner can also include a frequency-changeable compressor and multiple constant speed compressors in parallel or multiple frequency conversions in parallel
Compressor, and one of them is main frequency-changeable compressor, when there is multiple constant speed compressors or frequency-changeable compressor, in step 4,
All constant speed compressors are opened successively to be preheated.
The invention provides a kind of preheating starting method suitable for low-temperature heating, it is ensured that convertible frequency air-conditioner is in low temperature environment
Under, it still can normally, stably, quickly preheat and startup is heated, not only improve and heat speed, and have protection to compressor
Effect, improves the service life and user's usage comfort of convertible frequency air-conditioner.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of convertible frequency air-conditioner low-temperature starting control method, it is characterised in that comprise the following steps：
Step 1, gather and judge parameter and for judging whether to terminate the second of preheating for judging whether to the first of preheating
Judge parameter；
Step 2, the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises to first frequency Fa1 set in advance；
Step 3, judge parameter according to described first, judge whether convertible frequency air-conditioner needs preheating, need not such as preheat, then frequency conversion is empty
Adjust and continue regular boot up sequence；If desired for preheating, then into step 4；
Step 4, control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keep the stable fortune of pre-heat frequency Fa3
OK；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；
Step 5, judge that parameter judges whether to terminate warm according to described second, if terminating warm, according to interior
Machine ability need, controls main frequency-changeable compressor and other compressors to continue to run with or directly close.
2. control method according to claim 1, it is characterised in that：Described first judges that parameter includes operation of air conditioner mould
Environment temperature and/or main transformer frequency compressor shutdown time before formula, main transformer frequency compressor chamber temperature, pipeline start up by preheating；Described second
Judge that parameter includes the discharge superheat of preheating time and/or main frequency-changeable compressor.
3. control method according to claim 2, it is characterised in that：In step 3, judge whether the convertible frequency air-conditioner needs
Preheating specifically includes following steps：
Step 301, the first reference temperature t1 of setting, the first reference time T1, second frequency Fa2 and the second reference temperature t2；
Step 302, air conditioning operating mode is judged for heating mode or refrigeration mode, if refrigeration mode, then convertible frequency air-conditioner continues
Regular boot up sequence；If heating mode, then four-way valve commutation is controlled, and control the main transformer frequency compressor frequency to drop to institute
Second frequency Fa2 is stated, subsequently into step 303；
Step 303, judge the difference of environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating whether more than described
First reference temperature t1, if no more than described first reference temperature t1, into step 304；Such as larger than described first with reference to temperature
T1 is spent, then without warm, the convertible frequency air-conditioner continues regular boot up sequence；
Step 304, the downtime of the frequency-changeable compressor is judged, if less than the first reference time T1, if being not less than
The first reference time T1, then into step 305；If less than the first reference time T1, without warm, institute
State convertible frequency air-conditioner and continue regular boot up sequence；
Step 305, judge whether environment temperature is more than the second reference temperature t2 before the pipeline start up by preheating, if being not more than described
Second reference temperature t2, then into the warm of the step 4；If more than the second reference temperature t2, without pre-
Thermal process, the convertible frequency air-conditioner continues regular boot up sequence.
4. control method according to claim 3, it is characterised in that：First reference time T1 is 30min；When described
When environment temperature is less than 0 DEG C before pipeline start up by preheating, the first reference temperature t1 is set to 20 DEG C, when environment temperature before the pipeline start up by preheating
When degree is not less than 0 DEG C, the first reference temperature t1 is set to 30 DEG C；The second reference temperature t2 for [- 7 DEG C, 0 DEG C) or [- 15
DEG C, -8 DEG C) arbitrary value in two intervals.
5. control method according to claim 2, it is characterised in that：In step 5, judge whether that end warm is specific
Comprise the following steps：
Step 501, the second reference time T2 and the 3rd reference temperature t3 is set；
Step 502, judge whether preheating time is less than the second reference time T2, if less than the second reference time T2, entering
Step 503；If not less than the second reference time T2, terminating warm；
Step 503, judge whether the discharge superheat of the frequency-changeable compressor is less than the 3rd reference temperature t3, if less than described the
Three reference temperature t3, then proceed preheating；If not less than the 3rd reference temperature t3, terminating warm；
Step 504,502~503 are repeated the above steps, until warm terminates.
6. control method according to claim 5, it is characterised in that：When environment temperature is less than 0 DEG C before the pipeline start up by preheating
When, second reference time T2 is set to 10min, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, second ginseng
The time T2 of examining is set to 7min；When environment temperature is less than 0 DEG C before the pipeline start up by preheating, the 3rd reference temperature t3 is set to 10
DEG C, when environment temperature is not less than 0 DEG C before the pipeline start up by preheating, the 3rd reference temperature t3 is set to 15 DEG C.
7. a kind of convertible frequency air-conditioner cold-starting control system, it is characterised in that：Including acquisition module, control module, pipeline start up by preheating
Judge module, warm-up block and preheating terminate judge module；
The acquisition module is gathered judges parameter and for judging whether to terminate preheating for judging whether to the first of preheating
Second judge parameter；
The control module is used for before preheating judgement is carried out, and the main transformer frequency compressor frequency of control convertible frequency air-conditioner rises in advance
The first frequency Fa1 of setting；And after the warm terminates, according to indoor unit capability demand, control main frequency-changeable compressor
Continue to run with or directly close with other compressors；
The pipeline start up by preheating judge module is used to judge parameter according to described first, judges whether convertible frequency air-conditioner needs preheating；
The warm-up block is used to control the main transformer frequency compressor frequency to rise to pre-heat frequency Fa3, and keeps pre-heat frequency
Fa3 stable operations；Other compressors are opened successively simultaneously, and control other compressors with pre-heat frequency Fa3 stable operations；
The preheating, which terminates judge module, to be used to judge that parameter judges whether to terminate warm according to described second.
8. control system according to claim 7, it is characterised in that：The pipeline start up by preheating judge module includes the first setting
Unit, the first judging unit, the first control unit, the second judging unit, the 3rd judging unit and the 4th judging unit,
First setup unit is used to set the first reference temperature t1, the first reference time T1, the ginsengs of second frequency Fa2 and second
Examine temperature t2；
First judging unit is used to judge air conditioning operating mode for heating mode or refrigeration mode；
First control unit is used for when air conditioning operating mode is heating mode, control four-way valve commutation, and control is described
Main transformer frequency compressor frequency drops to the second frequency Fa2；
Second judging unit is used for the difference for judging environment temperature before frequency-changeable compressor cavity temperature and the pipeline start up by preheating
Whether the first reference temperature t1 is more than；
3rd judging unit is used to judge whether the downtime of the frequency-changeable compressor to be less than first reference time
T1；
4th judging unit is used to judge before the pipeline start up by preheating whether environment temperature to be more than the second reference temperature t2；
The preheating, which terminates judge module, includes the second setup unit, the 5th judging unit and the 6th judging unit,
Second setup unit is used to set the second reference time T2 and the 3rd reference temperature t3；
5th judging unit is used to judge whether preheating time is less than the second reference time T2；
6th judging unit is used to judge whether the discharge superheat of the frequency-changeable compressor to be less than the 3rd reference temperature t3.
9. a kind of air conditioner, it is characterised in that：Including convertible frequency air-conditioner cold-starting control system described in claim 7 or 8.
10. air conditioner according to claim 9, it is characterised in that：The air conditioner includes a frequency-changeable compressor and one
Individual constant speed compressor in parallel；Or a frequency-changeable compressor and multiple constant speed compressors in parallel；Or multiple changes in parallel
Frequency compressor, and one of them is main frequency-changeable compressor.
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| CN108954714B (en) * | 2018-07-25 | 2020-12-15 | 广东美的暖通设备有限公司 | Air conditioner and starting control method thereof |
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| CN113531802B (en) * | 2021-06-22 | 2022-10-28 | 青岛海尔空调器有限总公司 | Method for preheating air conditioner, air conditioner and air conditioning system |
| CN113531803A (en) * | 2021-06-22 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method and device for preheating heat insulation cotton of air conditioner, air conditioner and air conditioning system |
| CN113623793B (en) * | 2021-08-23 | 2022-09-16 | 宁波奥克斯电气股份有限公司 | Compressor preheating control method, air conditioner and computer readable storage medium |
| CN113969889B (en) * | 2021-11-18 | 2024-05-14 | 四川长虹空调有限公司 | Preheating control method and system for variable frequency compressor |
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