CN109210711A - Method and apparatus based on distance controlling compressor of air conditioner - Google Patents
Method and apparatus based on distance controlling compressor of air conditioner Download PDFInfo
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- CN109210711A CN109210711A CN201810966456.1A CN201810966456A CN109210711A CN 109210711 A CN109210711 A CN 109210711A CN 201810966456 A CN201810966456 A CN 201810966456A CN 109210711 A CN109210711 A CN 109210711A
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Classifications
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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
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
- F24F2120/12—Position of occupants
Abstract
The invention discloses a kind of method and apparatus based on distance controlling compressor of air conditioner, the described method includes: circulation executes following winding switching control processes: determining the real-time range between indoor occupant and air conditioner indoor unit, the real-time range is made comparisons with the first set distance threshold value；If the real-time range is not less than the first set distance threshold value, the winding for controlling compressor is triangle connection type；If the real-time range is less than the first set distance threshold value, the winding for controlling compressor is star-like connection mode.With the application of the invention, being able to ascend the overall operation performance of air conditioner.
Description
Technical field
The invention belongs to air-conditioning technique fields, specifically, being to be related to the control of air conditioner, more specifically, are
It is related to the method and apparatus based on distance controlling compressor of air conditioner.
Background technique
Existing transducer air conditioning by being adjusted to compressor operating frequency, have it is more accurate than air-conditioner with fixed frequency temperature control,
The advantage of the few, low noise of power consumption etc..For compressor, there is star-like connection mode and triangles for internal winding connection
Shape connection type, when compressor runs same frequency, compressor efficiency corresponding to different winding connections is endless
Exactly the same.The winding connection of major part compressor in air conditioner is after factory it has been determined that in the process of running at present
It cannot change, under certain running frequencies, compressor efficiency is not optimal under the winding connection of this determination, therefore,
The optimal of efficiency cannot be reached in entire operation of air conditioner frequency range.
To solve the problems, such as that compressor is non-optimal in whole service frequency range internal efficiency, occurring can be in operational process
The technology of middle adjustment compressor winding connection.For example, the Chinese patent application of Publication No. CN107395093A proposes
A kind of air conditioner, the air conditioner include compressor, and compressor includes control circuit, in compressor low-frequency operation, control
One end of each winding of circuit control compressor links together, and forms star-like connection mode；In the operation of compressor high frequency, control
The head and the tail of all windings of circuit control compressor processed connect, and form triangle connection type.In turn, control circuit is according to compressor
Running frequency control winding connection type switches between star and triangle, to improve operational efficiency.
It in the above-described techniques, is to influence compressor according to the switching of compressor operating frequency control winding connection type
This direct factor of the frequency of operational efficiency is the most directly, effectively for raising efficiency as control condition.But
It is that the main function of air conditioner is the comfort for adjusting indoor environment, improves human comfort.Merely according to compressor frequency
The switching of rate control winding connection type, although compressor operational efficiency can be improved, do not ensure that relaxing for indoor environment
Adaptive.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus based on distance controlling compressor of air conditioner, promote air conditioner
Overall operation performance.
For achieving the above object, method provided by the invention, which adopts the following technical solutions, is achieved:
A method of based on distance controlling compressor of air conditioner, which comprises
Circulation executes following winding switching control processes:
It determines the real-time range between indoor occupant and air conditioner indoor unit, the real-time range and the first set distance threshold value is made
Compare；
If the real-time range is not less than the first set distance threshold value, the winding for controlling compressor is triangle connection side
Formula；
If the real-time range is less than the first set distance threshold value, the winding for controlling compressor is star-like connection mode.
Preferably, the method also includes: during the winding switching control,
While the winding for controlling compressor is triangle connection type, the running frequency for controlling compressor is faced not less than setting
Boundary's frequency；
While the winding for controlling compressor is star-like connection mode, the running frequency for controlling compressor is less than the setting and faces
Boundary's frequency.
Preferably, the method also includes:
If the real-time range is not less than the first set distance threshold value, then the real-time range and the second set distance
Threshold value；The second set distance threshold value is greater than the first set distance threshold value；
If the real-time range is not less than the first set distance threshold value and is not more than the second set distance threshold value,
While the winding for controlling compressor is triangle connection type, corresponding relationship and the reality based on known distance and frequency
When distance adjustment compressor running frequency.
Preferably, the method also includes:
It is triangle connection type in the winding of control compressor if the real-time range is greater than the second set distance threshold value
While, compressor is controlled to fix running frequency operation.
Preferably, the method also includes:
While the winding for controlling compressor is star-like connection mode, corresponding relationship and institute based on known distance and frequency
State the running frequency of real-time range adjustment compressor.
Method as described above, control compressor winding by triangle connection type be switched to star-like connection mode or
When being switched to triangle connection type by star-like connection mode, control compressor is first shut down, and is then switched again.
Preferably, the method also includes: air-conditioning booting after, operation of air conditioner meet setting service condition after, execute institute
State winding switching control process.
Preferably, the method also includes:
After air-conditioning booting, when operation of air conditioner does not meet the setting service condition, the winding of compressor is controlled as triangle connection
Mode.
To realize aforementioned invention purpose, device provided by the invention, which adopts the following technical solutions, to be achieved:
A kind of device based on distance controlling compressor of air conditioner, described device include:
Compressor winding control unit is triangle connection type or star-like connection mode for controlling compressor winding；
Real-time range acquiring unit, for obtaining the real-time range between indoor occupant and air conditioner indoor unit；
Real-time range comparing unit for the real-time range to be made comparisons with set distance threshold value, and exports comparison result；Institute
Set distance threshold value is stated including at least the first set distance threshold value；
The compressor winding control unit is that the real-time range is not small in the output result of the real-time range comparing unit
The winding that compressor is controlled when the first set distance threshold value is triangle connection type, also in the real-time range comparing unit
Output result be the real-time range be less than the first set distance threshold value when control compressor winding be star-like connection
Mode.
Preferably, described device further include:
Compressor frequency control unit is at least triangle for the winding in compressor winding control unit control compressor
While shape connection type, the running frequency of compressor is controlled not less than setting critical frequency；It is controlled in the compressor winding
While the winding of unit control compressor is star-like connection mode, the running frequency for controlling compressor is critical less than the setting
Frequency.
Compared with prior art, the advantages and positive effects of the present invention are: being filled using control method of the invention and control
It sets, using the real-time range between indoor occupant and indoor unit as the condition of switching compressor winding connection, in order to realize
The comfort of personnel needs the frequency to air-conditioning, wind speed etc. to make different adjustment under different distances, that is, difference away from
From under, the different control strategies for realizing indoor environment comfort are corresponding with, it is therefore, reversed between the distance between personnel and indoor unit
The comfort for having reflected indoor environment was both able to achieve compared with the prior art is using the switching of compressor frequency control connection type
Compressor is controlled based on ambient intelligence, reaches taking into account for amenity and compressor operational efficiency；Also, indoor occupant and room
Although the distance between interior machine is the indirect factor for reflecting compressor operational efficiency, but adjusts compressor frequency and make room
It is interior it is comfortable with reference to direct parameter, thus, with the switching of distance controlling winding connection, can be realized to compressor around
It organizes the anticipation of connection type and controls in advance, be swift in response, control reliability is higher.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Detailed description of the invention
Fig. 1 is the flow chart of method one embodiment the present invention is based on distance controlling compressor of air conditioner；
Fig. 2 is that the present invention is based on the flow charts of another embodiment of the method for distance controlling compressor of air conditioner；
Fig. 3 is the structural block diagram of device one embodiment the present invention is based on distance controlling compressor of air conditioner.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples,
Invention is further described in detail.
Referring to Figure 1, which show the stream of method one embodiment the present invention is based on distance controlling compressor of air conditioner
Cheng Tu is specifically the compressor control method stream of the one embodiment for taking into account amenity and compressor operational efficiency
Cheng Tu.
As shown in Figure 1, the method that the embodiment realizes compressor of air conditioner control includes the following steps that the winding to be formed switches
Control process:
Step 101: the real-time range between indoor occupant and air conditioner indoor unit is determined, by real-time range and the first set distance threshold
Value is made comparisons.
Real-time range is after air-conditioning booting operation, according to the setting sample frequency indoor occupant that constantly obtains and update
The distance between air-conditioning.The determination of distance of the detection of indoor occupant and personnel and air conditioning room can be using the prior art come real
It is existing.For example, being come by the way that infrared sensor array or common infrared distance sensor are arranged on air-conditioning in conjunction with certain algorithm
It calculates and determines, which is not construed as limiting and elaborates to this.First set distance threshold value is preset known distance value, is used
The size of distance between reflection indoor occupant and indoor unit.The threshold value can be preset one in a control program when factory
Default value is also possible to a value by air conditioner user's sets itself, can be modified by authorization.Get in real time away from
From later, with the first set distance threshold value comparison size, different compressor controls is executed according to comparison result and is handled.
Step 102: judging real-time range whether less than the first set distance threshold value.If so, executing the control of step 103；
Otherwise, the control of step 104 is executed.
Step 103: if step 102 determine real-time range less than the first set distance threshold value, by control compressor around
Group is star-like connection mode.
If real-time range is less than the first set distance threshold value, real-time range is smaller at this time, shows personnel apart from indoor unit
It is relatively close.In this case, compressor generally will be with low frequency to avoid outlet air from causing discomfort because temperature is not suitable for blowing on human body
Rate operation.Therefore, the winding for controlling compressor in advance is star-like connection mode, under subsequent compression machine low frequency operating status
More preferably compressor operational efficiency can be obtained.
Step 104: if step 102 determines that real-time range is not less than the first set distance threshold value, compressor will be controlled
Winding is triangle connection type.
If real-time range is not less than the first set distance threshold value, real-time range is larger at this time, shows that personnel's distance is indoor
Machine is farther out.In this case, to improve the remotely comfort of personnel's ambient enviroment and then improving personnel's comfort, compressor one
As will be run with high-frequency.Therefore, the winding for controlling compressor in advance is triangle connection type, in subsequent compression machine high frequency
More preferably compressor operational efficiency can be obtained under rate operating status.
Control compressor is star-like connection mode or is triangle connection type, can be realized using the prior art,
The embodiment is not construed as limiting this.
Also, the winding switching control process that above steps is constituted, which recycles, to be executed.That is, in control compressor with star
In connection type or the triangle connection type course of work, still constantly executes step 101 and obtain real-time range and subsequent
Which kind of winding connection is multilevel iudge process, meet, then controls compressor winding and be switched to the on-link mode (OLM).
Using the cooler compressor control method of the embodiment, the real-time range between indoor occupant and indoor unit is made
It under different distances, is needed to air-conditioning to switch the condition of compressor winding connection in order to realize the comfort of personnel
Frequency, wind speed etc. make different adjustment, that is, being corresponding with the different controls for realizing indoor environment comfort under different distance
System strategy, therefore, the distance between personnel and indoor unit reflect the comfort of indoor environment indirectly, with the prior art using pressure
The switching of contracting unit frequency control connection type is compared, and has both been able to achieve and has been controlled compressor based on ambient intelligence, has reached amenity
With taking into account for compressor operational efficiency；Although also, the distance between indoor occupant and indoor unit are reflection compressor operation effects
The indirect factor of rate, but adjust compressor frequency make indoor comfortable with reference to direct parameter, thus, with distance
The switching of control winding connection type can be realized the anticipation to compressor winding connection and control in advance, is swift in response,
It is higher to control reliability.
Fig. 2 is referred to, which show that the present invention is based on the method for distance controlling compressor of air conditioner another embodiments
Flow chart specifically, and takes into account the compressor control side of one embodiment of amenity and compressor operational efficiency
Method flow chart.
As shown in Fig. 2, the method that the embodiment realizes compressor of air conditioner control includes the following steps the process to be formed:
Step 201: air-conditioning booting operation.
Step 202: judge whether operation of air conditioner meets setting service condition, and according to judging result execute step 203 or
Person's step 204.
Setting service condition be for judge Air conditioners running mode if appropriate for execute winding switching control process condition,
The running frequency that runing time including but not limited to after air conditioner booting reaches after setting runing time or booting reaches and sets
Determine running frequency.
Step 203: if step 202 determine operation of air conditioner do not meet setting service condition also, by control compressor around
Group is triangle connection type.
Generally, air-conditioning can reach setting service condition with faster speed, also, after air-conditioning booting, air-conditioning one
As be all high frequency operation, rapidly reach higher frequency.In light of this situation, in this embodiment, by triangle connection side
Initial connection mode of the formula as compressor winding after booting avoids continually switching winding connection in the operation of air conditioner initial stage
Mode.
Meanwhile in the control stage, compressor operating frequency is not construed as limiting, can be run for the frequency of putting of non-frequency limit,
It is fixed and for higher frequency to be also possible to operation one, realizes the quick adjusting of room temperature.
Step 204: if step 202 determines that operation of air conditioner meets setting service condition, being based on real-time range for executing
Winding connection control.
Specifically, it is real-time range between determining indoor occupant and air conditioner indoor unit, real-time range is set with first
Set a distance threshold value is made comparisons.The step more specifically realizes corresponding description of the process refering to fig. 1 in embodiment step 101.
Step 205: judging real-time range whether less than the first set distance threshold value.If so, executing step 209；Otherwise, it holds
Row step 206.
Step 206: if step 205 determines that real-time range is not less than the first set distance threshold value, then comparing real-time range
With the size of the second set distance threshold value, judge whether real-time range is greater than the second set distance threshold value.It is held according to judging result
The control of row step 207 or step 208.
Wherein, the second set distance threshold value is greater than the first set distance threshold value and preset numerical value, reflects indoor occupant
The size of distance between indoor unit.Likewise, the second set distance threshold value can be when factory it is preset in a control program
One default value is also possible to a value by air conditioner user's sets itself, can be modified by authorization.
Step 207: if it is determined that real-time range is not less than the first set distance threshold value and is not more than the second set distance threshold
Value, shows that real-time range is of moderate size, and is triangle connection type by the winding for controlling compressor, to improve compressor operation effect
Rate.Meanwhile compressor operating frequency will also be adjusted, corresponding relationship specifically based on known distance and frequency and
Real-time range adjusts the running frequency of compressor, realizes the technical effect that the adjustment of transducer air conditioning temperature is accurate, low energy consumption.
Specifically, being previously stored with corresponding relationship of the distance with frequency in the memory of air-conditioning master control borad, wherein distance
Refer to the distance between indoor human body and air conditioner indoor unit, frequency refers to the running frequency of compressor.Preferably, distance and frequency
Corresponding relationship be by research staff under theoretical direction, Neng Goujin obtained by a large amount of operation of air conditioner simulated experiment
Air-conditioning comfort and energy saving may be taken into account.Moreover, positively related relationship is presented between distance and frequency.That is, distance is got over
Small, frequency is also lower；Vice versa.Moreover, the corresponding relationship between distance and frequency, can be calculated by specific calculation
A kind of relationship obtained is also possible to the one-to-one relationship by way of table.It is counted if it is by calculation
It calculates, then calculation is stored in advance, after obtaining real-time range, real-time range is calculated according to real-time range and calculation
Corresponding frequency.It can basis after obtaining real-time range if the one-to-one relationship formed by way of table
Real-time range takes the mode tabled look-up to read out the corresponding frequency of real-time range.Compressor operating frequency is adjusted by distance, it can
To improve outlet air comfort, and then personnel's comfort is improved, energy consumption can also be reduced.
Step 208: if it is determined that real-time range is greater than the second set distance threshold value, showing that real-time range is larger, will control
The winding of compressor is triangle connection type, to improve compressor operational efficiency.Meanwhile compressor operating frequency to also be made
Adjustment controls compressor specifically to fix running frequency operation, and the fixation running frequency is generally higher frequency,
Reach in quickly-conditioning indoor temperature to the technical effect of level of comfort.
Step 209: if step 205 determine real-time range less than the first set distance threshold value, by control compressor around
Group is star-like connection mode.
If real-time range is less than the first set distance threshold value, real-time range is smaller at this time, shows personnel apart from indoor unit
It is relatively close.In this case, compressor generally will be with low frequency to avoid outlet air from causing discomfort because temperature is not suitable for blowing on human body
Rate operation.Therefore, the winding for controlling compressor in advance is star-like connection mode, under subsequent compression machine low frequency operating status
More preferably compressor operational efficiency can be obtained.Meanwhile compressor operating frequency will also be adjusted, specifically it is also based on
The corresponding relationship and real-time range of known distance and frequency adjust the running frequency of compressor, realize transducer air conditioning temperature tune
Whole technical effect accurate, low energy consumption.More specific frequency adjusting method referring to step 207 description.
In some other preferred embodiment, in the step 207 and step 208 of winding switching control process, controlling
While the winding of compressor is triangle connection type, the running frequency of control compressor is not less than setting critical frequency.
Wherein, setting critical frequency is known frequency values, and generally compressor operational efficiency under two kinds of winding connections occurs
The frequency values of turnover can be determined according to compressor operational efficiency curve.As a result, by compressor under triangle connection type
Running frequency make the restriction of minimum running frequency so that compressor maintains higher operation under the winding connection
Efficiency.
Likewise, the winding in the step 209 control compressor of winding switching control process is the same of star-like connection mode
When, the running frequency for controlling compressor is less than setting critical frequency.Pass through the operation to compressor under star-like connection mode as a result,
Frequency makees the restriction of maximum frequency of operation, so that compressor also maintains higher operation effect under the winding connection
Rate.
Cooler compressor is controlled using the method for the embodiment, had both been able to achieve based on environmental amenity degree intelligent control pressure
Contracting machine reaches taking into account for amenity and compressor operational efficiency, not will cause compressor also because continually switching winding connects
The comfort for reducing indoor environment brought by mode, the generation for reducing the problem of compressor service life are connect, air-conditioning is improved
Device overall performance.
In other some preferred embodiments, star is switched to by triangle connection type in the winding of control compressor
Connection type or when being switched to triangle connection type by star-like connection mode, control compressor is first shut down, and is then switched again, is protected
The safety for demonstrate,proving compressor, further increases operational reliability and compressor service life.
Fig. 3 is referred to, which show the knot of device one embodiment the present invention is based on distance controlling compressor of air conditioner
Structure block diagram.
As shown in figure 3, the function of structural unit included by the device of the embodiment, each structural unit and between each other
Relationship it is as follows:
Real-time range acquiring unit 301, for obtaining the real-time range between indoor occupant and air conditioner indoor unit.
Real-time range comparing unit 302 for the real-time range to be made comparisons with set distance threshold value, and exports and compares
As a result；Set distance threshold value includes at least the first set distance threshold value.
Compressor winding control unit 303, the winding for controlling compressor 304 are that triangle connection type or star connect
Connect mode.It specifically, is that compressor winding connection side is controlled according to the comparison result that real-time range comparing unit 302 exports
Formula.Further, compressor winding control unit 303 real-time range comparing unit 302 output result be real-time range not
The winding that compressor is controlled when less than the first set distance threshold value is triangle connection type, also in real-time range comparing unit
302 output result be real-time range less than the first set distance threshold value when control compressor winding be star-like connection mode.
As preferred embodiment, control device can also include:
Compressor frequency control unit, at least for being controlled in compressor winding control unit 303 during winding switching control
While the winding of compressor 304 processed is triangle connection type, the running frequency of control compressor 304 is critical not less than setting
Frequency；While the winding that compressor winding control unit 303 controls compressor 304 is star-like connection mode, control compression
The running frequency of machine 304 is less than setting critical frequency.
Compressor control device with above structure can be applied in air-conditioning, run corresponding software program, and press
Compressor operation control is executed according to the process of Fig. 1, Fig. 2 or other preferred embodiments, is realized based on environmental amenity degree intelligence
Compressor is controlled, taking into account for amenity and compressor operational efficiency, promotion air conditioner overall performance are reached.It is more specifically former
Reason and process are refering to the above-mentioned description as described in control method.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method based on distance controlling compressor of air conditioner, which is characterized in that the described method includes:
Circulation executes following winding switching control processes:
It determines the real-time range between indoor occupant and air conditioner indoor unit, the real-time range and the first set distance threshold value is made
Compare；
If the real-time range is not less than the first set distance threshold value, the winding for controlling compressor is triangle connection side
Formula；
If the real-time range is less than the first set distance threshold value, the winding for controlling compressor is star-like connection mode.
2. the method according to claim 1, wherein the method also includes: in the winding switching control
Cheng Zhong,
While the winding for controlling compressor is triangle connection type, the running frequency for controlling compressor is faced not less than setting
Boundary's frequency；
While the winding for controlling compressor is star-like connection mode, the running frequency for controlling compressor is less than the setting and faces
Boundary's frequency.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
If the real-time range is not less than the first set distance threshold value, then the real-time range and the second set distance
Threshold value；The second set distance threshold value is greater than the first set distance threshold value；
If the real-time range is not less than the first set distance threshold value and is not more than the second set distance threshold value,
While the winding for controlling compressor is triangle connection type, corresponding relationship and the reality based on known distance and frequency
When distance adjustment compressor running frequency.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
It is triangle connection type in the winding of control compressor if the real-time range is greater than the second set distance threshold value
While, compressor is controlled to fix running frequency operation.
5. according to the method described in claim 2, it is characterized in that, the method also includes:
While the winding for controlling compressor is star-like connection mode, corresponding relationship and institute based on known distance and frequency
State the running frequency of real-time range adjustment compressor.
6. the method according to claim 1, wherein the winding in control compressor is cut by triangle connection type
When being changed to star-like connection mode or being switched to triangle connection type by star-like connection mode, control compressor is first shut down, then
Switch again.
7. method according to any one of claim 1 to 6, which is characterized in that the method also includes:
After air-conditioning booting, after operation of air conditioner satisfaction setting service condition, the winding switching control process is executed.
8. the method according to the description of claim 7 is characterized in that the method also includes:
After air-conditioning booting, when operation of air conditioner does not meet the setting service condition, the winding of compressor is controlled as triangle connection
Mode.
9. a kind of device based on distance controlling compressor of air conditioner, which is characterized in that described device includes:
Compressor winding control unit is triangle connection type or star-like connection mode for controlling compressor winding；
Real-time range acquiring unit, for obtaining the real-time range between indoor occupant and air conditioner indoor unit；
Real-time range comparing unit for the real-time range to be made comparisons with set distance threshold value, and exports comparison result；Institute
Set distance threshold value is stated including at least the first set distance threshold value；
The compressor winding control unit is that the real-time range is not small in the output result of the real-time range comparing unit
The winding that compressor is controlled when the first set distance threshold value is triangle connection type, also in the real-time range comparing unit
Output result be the real-time range be less than the first set distance threshold value when control compressor winding be star-like connection
Mode.
10. device according to claim 9, which is characterized in that described device further include:
Compressor frequency control unit is at least used for during winding switching control, in the compressor winding control unit
While the winding for controlling compressor is triangle connection type, the running frequency of compressor is controlled not less than the critical frequency of setting
Rate；While the winding of compressor winding control unit control compressor is star-like connection mode, compressor is controlled
Running frequency is less than the setting critical frequency.
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