CN107143979A - Control method, control device and the air conditioner of multi-split air conditioner - Google Patents
Control method, control device and the air conditioner of multi-split air conditioner Download PDFInfo
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Abstract
The control method of multi-split air conditioner, including：The corresponding compressor rated frequency of the rated cooling capacity stored in controller of air conditioner is called, outer function power ratio is calculated, the temperature difference of indoor environment temperature, computing environment temperature and design temperature is gathered, actual temperature difference weighted value and actual wind speed weighted value is calculated；Calculate compressor operating frequency, compressor operating frequency is equal to outer function power than, the product of compressor rated frequency, actual temperature difference weighted value and actual wind speed weighted value；Compressor is run according to compressor operating frequency, judge whether all indoor set temperature difference are less than first amplitude, if respectively less than first amplitude, controls compressor to continue to run with the setting cycle according to compressor operating frequency, variation tendency of the temperature difference in the setting cycle is judged；If variation tendency of all temperature difference in the setting cycle is satisfied by imposing a condition, the running frequency of compressor is reduced.Control device and air conditioner are also disclosed.The present invention has the advantages that energy consumption is low and control accuracy is high.
Description
Technical field
The present invention relates to apparatus of air conditioning technical field, more particularly to a kind of control method of multi-split air conditioner, control
Device processed and the multi-split air conditioner using this kind of control method.
Background technology
Multi-split air conditioner, refers to that an outdoor unit can arbitrarily match the indoor set of different operating modes, according to indoor set
Feature is controlled.It is different from traditional air conditioner, because indoor set can arbitrarily enter in the range of the service ability of outdoor unit
Row matching, so, the capital equipment, the control signal of such as compressor, outdoor fan and four-way valve in control kind of refrigeration cycle are by room
Outer machine control chip output.
The characteristics of different because indoor set has, in control, existing mode is according to fixed operating condition calculating
And one fixed running frequency of compressor is distributed to, and control compressor to be run according to the running frequency.Due to operating condition
Division be discrete, so, the accuracy of running frequency that compressor distribution is obtained is relatively low, especially close to design temperature
When, it is difficult to continue frequency reducing, it is impossible to reach the purpose of preferable low-frequency operation power saving.
The content of the invention
The present invention provides a kind of control method of multi-split air conditioner, distributes what is obtained to solve compressor in the prior art
Running frequency accuracy is relatively low, it is impossible to the problem of reaching preferable low-frequency operation.
The present invention provides a kind of control method of multi-split air conditioner, comprises the following steps：
Air conditioner is started shooting, and controller of air conditioner receives design temperature and setting mode of operation；
The designed capacity of each indoor set in open state, and outdoor unit design maximum ability are called, outer machine is calculated
Ability ratio, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+indoor set n designed capacitys）/ room
Outer machine design maximum ability；
The compressor rated frequency stored in controller of air conditioner is called, is gathered residing for each indoor set in open state
The temperature difference of the real-time indoor environment temperature of air-conditioned room, computing environment temperature and design temperature, according to environment temperature and setting temperature
The temperature difference of degree call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Operation mode calls wind speed the weighted value Ki, i of each indoor fan in open state=(1,2 ... n), calculates the actual temperature difference
Weighted value P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/ ∑ Pi, wherein the compression
Machine rated frequency is running frequency when compressor exports rated cooling capacity；
Outdoor controller utilizes the compressor rated frequency, actual temperature difference weighted value, actual wind speed weighted value and outer function
Power is equal to outer function power ratio, compressor rated frequency, actual temperature difference power than calculating compressor operating frequency, compressor operating frequency
The product of weight values and actual wind speed weighted value；
Outdoor controller control compressor is run according to compressor operating frequency, judges that each of which platform is in open state
Whether indoor set environment temperature and the temperature difference of design temperature are less than first amplitude, if the temperature difference of all indoor sets is respectively less than
First amplitude, then control compressor to proceed to setting end cycle according to the compressor operating frequency, judges each
Whether variation tendency of the temperature difference of indoor set in the setting cycle, which meets, imposes a condition；If the temperature of all indoor sets
Variation tendency of the difference in the setting cycle is satisfied by imposing a condition, then outdoor controller pro-active intervention, control reduction compressor
Running frequency operation.
Further, when judging variation tendency of the temperature difference in the setting cycle, set described in controller of air conditioner collection
The first temperature signal when fixed cycle starts, and the second temperature signal during the setting end cycle, if second temperature difference is believed
Number being less than the first temperature signal and the second temperature signal is more than or equal to 0, then judges that change of the temperature difference in the setting cycle becomes
Gesture meets and imposed a condition, the running frequency operation of reduction compressor.
Further, if when setting end cycle, second temperature signal is more than the first amplitude, then control pressure
Contracting machine is run according to compressor operating frequency.
Further, imposed a condition if variation tendency of the temperature difference in the setting cycle is met, control compressor is pressed
According to frequency of amendment operation, the frequency of amendment is the difference of the integral multiple of compressor operating frequency and the first correction value.
Further, multiple frequency of amendments that control compressor is reduced according to gradient successively distinguish the multiple settings of circular flow
Unit interval, and judge whether the temperature difference is less than first amplitude and more than 0 at the end of each setting unit interval；Wherein, such as
The fruit temperature difference is less than first amplitude and more than 0, then continues to reduce the frequency of amendment until the frequency of amendment is equal to compressor most
Small frequency；Compressor minimum frequency is the minimum output frequency of compressor.
It is preferred that, value≤1 DEG C of the first amplitude.
It is preferred that, first correction value is 0.5Hz, 1Hz or 2Hz.
Multi-split air conditioner control method proposed by the invention, when the temperature difference is smaller and within the specific limits, outdoor unit
Controller pro-active intervention controls compressor operating frequency, and control compressor is run according to frequency of amendment, is ensureing air-conditioning effect
Meanwhile, the precision of compressor frequency control is improved, the power consumption of air conditioner is simultaneously effective reduced, reaches the skill of energy-conserving and environment-protective
Art effect.
The invention also discloses a kind of multi-split air conditioner control device, including：
Setup unit, for receiving air conditioner design temperature and setting mode of operation；
First computing unit, the designed capacity for calling each indoor set in open state, and outdoor unit are maximum
Designed capacity, the outer function power ratio of calculating, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+room
Interior machine n designed capacitys）/ outdoor unit design maximum ability；
Parameter setting unit, for calling compressor rated frequency, sky residing for each indoor set in open state of collection
The temperature difference of real-time indoor environment temperature between transferring house, computing environment temperature and design temperature, according to environment temperature and design temperature
The temperature difference call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Wind speed the weighted value Ki, i of each indoor fan in open state of mode invocation=(1,2 ... n), calculates actual temperature difference power
Weight values P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/∑Pi；Wherein described compressor
Rated frequency is the running frequency that compressor exports rated cooling capacity；
Second computing unit, for utilizing outer function power ratio, compressor rated frequency, actual temperature difference weighted value, actual wind speed power
Weight values calculate compressor operating frequency, and compressor operating frequency is equal to outer function power ratio, compressor rated frequency, actual temperature difference power
The product of weight values and actual wind speed weighted value；
Control unit, for controlling compressor to be run according to compressor operating frequency；
First identifying unit, for when compressor is run according to compressor operating frequency, judging that each of which platform is in start
Whether the indoor set environment temperature of state and the temperature difference of design temperature are less than first amplitude；
First execution unit, for when the temperature difference of all indoor sets is respectively less than first amplitude, control compressor to be according to pressure
Contracting machine running frequency is run to setting end cycle；
Second identifying unit, for judging in the setting cycle, the temperature difference of each indoor set in open state becomes
Whether change trend, which meets, imposes a condition；
Second execution unit, for being satisfied by setting bar in the difference variation trend of all indoor sets in open state
During part, the running frequency operation of pro-active intervention control reduction compressor.
Further, the process that the second execution unit pro-active intervention control reduction compressor operating frequency is run is such as
Under：
If the temperature difference is respectively less than first amplitude, multiple frequency of amendments that control compressor is reduced according to gradient successively distinguish circulating
Row multiple setting unit interval, and judge whether the temperature difference is respectively less than first amplitude and big at the end of each setting unit interval
In 0；If the temperature difference is respectively less than first amplitude and more than 0, continue to reduce frequency of amendment until frequency of amendment is equal to compressor most
Small frequency；Wherein compressor minimum frequency is the minimum output frequency of compressor.
Multi-split air conditioner control device disclosed in this invention is smaller and solid in the temperature difference by the way of pro-active intervention
When being scheduled on certain limit, accurate control compressor low-frequency operation significantly reduces the overall power of compressor.
A kind of air conditioner is also disclosed, using multi-split air conditioner control method, multi-split air conditioner control method bag
Include following steps：
Air conditioner is started shooting, and controller of air conditioner receives design temperature and setting mode of operation；
The designed capacity of each indoor set in open state, and outdoor unit design maximum ability are called, outer machine is calculated
Ability ratio, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+indoor set n designed capacitys）/ room
Outer machine design maximum ability；
The compressor rated frequency stored in controller of air conditioner is called, is gathered residing for each indoor set in open state
The temperature difference of the real-time indoor environment temperature of air-conditioned room, computing environment temperature and design temperature, according to environment temperature and setting temperature
The temperature difference of degree call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Operation mode calls wind speed the weighted value Ki, i of each indoor fan in open state=(1,2 ... n), calculates the actual temperature difference
Weighted value P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/ ∑ Pi, wherein the compression
Machine rated frequency is running frequency when compressor exports rated cooling capacity；
Outdoor controller utilizes the compressor rated frequency, actual temperature difference weighted value, actual wind speed weighted value and outer function
Power is equal to outer function power ratio, compressor rated frequency, actual temperature difference power than calculating compressor operating frequency, compressor operating frequency
The product of weight values and actual wind speed weighted value；
Outdoor controller control compressor is run according to compressor operating frequency, judges that each of which platform is in open state
Whether indoor set environment temperature and the temperature difference of design temperature are less than first amplitude, if the temperature difference of all indoor sets is respectively less than
First amplitude, then control compressor to proceed to setting end cycle according to the compressor operating frequency, judges each
Whether variation tendency of the temperature difference of indoor set in the setting cycle, which meets, imposes a condition；If the temperature of all indoor sets
Variation tendency of the difference in the setting cycle is satisfied by imposing a condition, then outdoor controller pro-active intervention, control reduction compressor
Running frequency operation.
Air conditioner disclosed in this invention has the advantages that energy consumption is low and comfort level is high.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of multi-split air conditioner control method embodiment one of the present invention；
Fig. 2 drags many flow charts of air conditioning control method embodiment two for the present invention one.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It as shown is a kind of flow chart of specific embodiment of multi-split air conditioner control method disclosed in this invention.This
The multi-split air conditioner that embodiment is refered in particular to, the quantity and ability of indoor set can be according to actual needs in the design works of outdoor unit
Make to be chosen in the range of ability, controller of air conditioner includes the indoor machine controller set in each indoor set, and
The outdoor controller set in outdoor unit.The independent switching on and shutting down instruction of each indoor machine controller reception and remote control are defeated
The design temperature signal and setting mode of operation gone out, and exported by COM1 to outdoor controller.When indoor set control
Device is received after start-up command and design temperature signal, and indoor set brings into operation.Outdoor controller is according to many indoor sets
Setup parameter generates compressor control signal.
Specifically, as shown in figure 1, outdoor controller calls each indoor set in open state to set first
Meter ability, and outdoor unit design maximum ability, the outer function power ratio of calculating, its China and foreign countries' function power ratio=（The designed capacity of indoor set 1+
The designed capacity of indoor set 2+...+indoor set n designed capacitys）/ outdoor unit design maximum ability, n is the interior in open state
The number of units of machine.
Outdoor controller is further called at the compressor rated frequency stored in controller of air conditioner, each of collection
The temperature of the real-time indoor environment temperature of air-conditioned room residing for indoor set in open state, computing environment temperature and design temperature
Difference, the temperature difference weighted value Pi of each indoor set in open state is called according to the temperature difference of environment temperature and design temperature,
I=(1,2 ... n), according to setting mode of operation call each in open state indoor fan wind speed weighted value Ki, i=
(1,2 ... n), calculates actual temperature difference weighted value P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*
Pi）/ ∑ Pi, wherein the running frequency when compressor rated frequency is compressor output rated cooling capacity.
One group of preferred temperature difference weighted value Pi is as follows, when air conditioner is operated in refrigeration or dehumidification mode, if the temperature difference
Less than or equal to 1 DEG C, then temperature difference weighted value is 0.6；If the temperature difference is more than 1 DEG C and less than 2 DEG C, temperature difference weighted value is 0.9；If
The temperature difference is more than 2 DEG C and less than 3 DEG C, then temperature difference weighted value is 1.1；If the temperature difference is more than 3 DEG C and less than 4 DEG C, temperature difference weighted value
For 1.2；If the temperature difference is more than 4 DEG C, temperature difference weighted value is 1.4.When air conditioner is operated in heating mode, if the temperature difference is less than
Equal to 1 DEG C, then temperature difference weighted value is 0.5；If the temperature difference is more than 1 DEG C and less than 2 DEG C, temperature difference weighted value is 0.7；If the temperature difference
More than 2 DEG C and less than 3 DEG C, then temperature difference weighted value is 1；If the temperature difference is more than 3 DEG C and less than 4 DEG C, temperature difference weighted value is 1.4；
If the temperature difference is more than 4 DEG C, temperature difference weighted value is 1.6.The different working modes of correspondence setting, one group of preferred wind of indoor fan
Fast weighted value Ki is as follows, and when indoor fan is gentle breeze state, wind speed weighted value is 0.7, when indoor fan is low wind conditions,
Wind speed weighted value is 0.75, and when indoor fan is apoplexy state, wind speed weighted value is 0.9, when indoor fan is high wind state
When, wind speed weighted value is 1.15, and when indoor fan is blown for strength, wind speed weighted value is 1.3；When indoor set is in Jing Yin mould
When formula or healthy flow pattern, wind speed weighted value is 0.5.If setting indoor fan as automatic ventilating state, wind speed weight
It is worth for 1.15.
Outdoor controller utilizes the outer function power ratio, compressor rated frequency, actual temperature difference weighted value, actual wind speed
Weighted value calculates compressor operating frequency, and compressor operating frequency is equal to outer function power ratio, compressor rated frequency, the actual temperature difference
The product of weighted value and actual wind speed weighted value.
Outdoor controller control compressor is run according to compressor operating frequency, in the running of air conditioner, room
Outer machine controller continues to calculate the running frequency of compressor according to the temperature difference and the running status of indoor fan.
In the process of running, for the air-conditioned room residing for each indoor set, between room temperature and design temperature
Deviation persistently reduces, and now controller of air conditioner persistently judges the environment temperature of each air conditioner room unit in open state
Whether the temperature difference of degree and design temperature is less than first amplitude.First amplitude is respectively less than if all of the temperature difference, then it needs to be determined that empty
Adjust whether the working condition of device is stablized, discharge the interference of specific factor, and enter next stage accurately controlled.It is specific next
Say, control compressor continues to run with a setting cycle according to compressor operating frequency, and judges the temperature difference in the setting cycle
Whether variation tendency, stablized with the working condition for determining air conditioner.If in the setting cycle, all temperature difference still become lasting
It is small, then it is determined as that variation tendency of the temperature difference in the setting cycle is met and imposes a condition, outdoor controller pro-active intervention, reduction pressure
The running frequency operation of contracting machine.So as to realizing when the temperature difference is narrowed down in certain interval range, compressor power consumption and gradually is reduced
The deviation reduced between design temperature and indoor air temperature in air conditioned building is preferably experienced there is provided user.
When judging variation tendency of the temperature difference in the setting cycle, preferably, the collection setting cycle starts one kind
When the first temperature signal and setting end cycle when the second temperature signal, if the second temperature signal be less than first temperature difference letter
Number, and the second temperature signal is more than or equal to 0, then judges that variation tendency of the temperature difference in the setting cycle is met and impose a condition, be i.e. room
The deviation of gentle design temperature in less scope, then actively reduces the running frequency operation of compressor.And if
When setting end cycle, wherein the second temperature signal of any one indoor set is more than the operation shape of first amplitude, then air conditioner
The air condition of state and air-conditioned room is still unstable, then controls compressor to continue to run according to compressor operating frequency, control is empty
Temperature between transferring house is reduced in comfortable scope and reaches stabilization as early as possible, to lift Consumer's Experience.Certainly, judge that the temperature difference is being set
Variation tendency in fixed cycle such as can also form each indoor set institute using other forms using outdoor controller
Locate the changing trend diagram in the air-conditioned room temperature difference and setting cycle, and calculate the slope of changing trend diagram, by the slope calculated with
The slope of predetermined temperature difference chart is compared, and is judged whether variation tendency meets and is imposed a condition.But the latter needs outdoor unit control
Utensil has stronger data-handling capacity, and this can increase the holistic cost of equipment.
In the present embodiment, the first correction value is mainly utilized when pro-active intervention reduces the running frequency of compressor.Calculate pressure
The difference of contracting machine running frequency and the first correction value, obtains frequency of amendment, and control compressor to be run according to frequency of amendment.Specifically
For, the running frequency of pro-active intervention reduction compressor is preferred to use the mode of gradient control, to avoid the temperature in room from going out
Existing excessive fluctuation.Specifically, when the temperature difference of setting end cycle and all air-conditioned rooms of outdoor controller judgement is being set
When variation tendency in fixed cycle is satisfied by imposing a condition, calculates and obtain first with compressor operating frequency and the first correction value
One frequency of amendment, the frequency of amendment=correction value of compressor operating frequency-the first, outdoor controller controls compressor according to repairing
The positive frequency run unit time, and it is to determine whether that the temperature difference of all air-conditioned rooms is all higher than being equal to again to terminate in the unit interval
0 DEG C and less than first amplitude.If greater than equal to 0 DEG C, and less than first amplitude, then the temperature difference then continues in controllable scope
Reduce the first correction value on the basis of frequency of amendment, and control compressor according to reducing the frequency of amendment of the first correction value again
Operation, repeats said process, until frequency of amendment is equal to the setting minimum frequency of compressor.In each cycle, amendment frequency
Rate=correction value the * of compressor operating frequency-the first N, N are the number of unit time, and frequency of amendment is compressor operating frequency and the
The difference of one correction value integral multiple, so that the data processing amount of outdoor controller is controlled in controllable scope, it is to avoid waste
Hardware resource.Maintain compressor according to setting minimum frequency operation, until the temperature difference be more than first amplitude, then control compressor according to
Compressor operating frequency is run.In this process, compressor is reduced according to gradient successively under the control of outdoor controller
Multiple frequency of amendments difference circular flow multiple setting unit interval, and each setting unit interval at the end of judge to open
Whether the indoor set correspondence temperature difference of machine, which meets, imposes a condition.So as to control compressor being gradually lowered to the minimum frequency of compressor setting
Rate, while multiple indoor mechanism colds or heating effect is ensured, realizes the accurate control to compressor actual frequency, reduces
Energy consumption.
In order to ensure that air-conditioned room is rapidly reached design temperature, it is preferred that value≤1 DEG C of the first amplitude.First
The representative value of amplitude is 0.5 DEG C or 1 DEG C.I.e. when the difference of indoor air temperature in air conditioned building and design temperature is 0.5 DEG C or 1 DEG C, just to pressure
Contracting unit frequency carries out pro-active intervention.To improve control accuracy, the first correction value is 0.5Hz, 1Hz or 2Hz, preferably 1Hz.
Multi-split air conditioner control method disclosed in the present embodiment, the characteristics of for independent assortment air conditioner, no matter room
Interior machine select which kind of specification, can it is smaller in the temperature difference and within the specific limits when, compressed by outdoor controller pro-active intervention
Machine running frequency, control compressor while air-conditioning effect is ensured, is improved according to the minimum output frequency of frequency of amendment runtime value
The precision of compressor frequency control, while effectively reducing the power consumption of multi-split air conditioner complete machine, reaches the skill of energy-conserving and environment-protective
Art effect.
Present invention simultaneously provides a kind of multi-split air conditioner control device, including：
Setup unit, for receiving air conditioner design temperature and setting mode of operation；
First computing unit, the designed capacity for calling each indoor set in open state, and outdoor unit are maximum
Designed capacity, the outer function power ratio of calculating, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+room
Interior machine n designed capacitys）/ outdoor unit design maximum ability；
Parameter setting unit, for calling compressor rated frequency, sky residing for each indoor set in open state of collection
The temperature difference of real-time indoor environment temperature between transferring house, computing environment temperature and design temperature, according to environment temperature and design temperature
The temperature difference call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Wind speed the weighted value Ki, i of each indoor fan in open state of mode invocation=(1,2 ... n), calculates actual temperature difference power
Weight values P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/∑Pi；Wherein described compressor
Rated frequency is the running frequency that compressor exports rated cooling capacity；
Second computing unit, for utilizing outer function power ratio, compressor rated frequency, actual temperature difference weighted value, actual wind speed power
Weight values calculate compressor operating frequency, and compressor operating frequency is equal to outer function power ratio, compressor rated frequency, actual temperature difference power
The product of weight values and actual wind speed weighted value；
Control unit, for controlling compressor to be run according to compressor operating frequency；
First identifying unit, for when compressor is run according to compressor operating frequency, judging that each of which platform is in start
Whether the indoor set environment temperature of state and the temperature difference of design temperature are less than first amplitude；
First execution unit, for when the temperature difference of all indoor sets is respectively less than first amplitude, control compressor to be according to pressure
Contracting machine running frequency is run to setting end cycle；
Second identifying unit, for judging in the setting cycle, the temperature difference of each indoor set in open state becomes
Whether change trend, which meets, imposes a condition；
Second execution unit, for being satisfied by setting bar in the difference variation trend of all indoor sets in open state
During part, the running frequency operation of pro-active intervention control reduction compressor.
The process of the second execution unit pro-active intervention control reduction compressor operating frequency operation is as follows：
If the temperature difference is less than first amplitude, multiple frequency of amendments that control compressor is reduced according to gradient successively distinguish circular flow
Multiple setting unit interval, and judge whether the temperature difference is less than first amplitude and more than 0 at the end of each setting unit interval；
If the temperature difference is less than first amplitude and more than 0, continue to reduce frequency of amendment until frequency of amendment is equal to compressor minimum frequency；
Wherein compressor minimum frequency is the minimum output frequency of compressor.
Multi-split air conditioner control device disclosed in this invention, is not limiting the condition of matching indoor set designed capacity
Under, by the way of pro-active intervention, the temperature difference it is smaller and it is fixed within the specific limits when, accurate control compressor low-frequency operation,
Significantly reduce the overall power of compressor.
The present invention also discloses a kind of air conditioner, using the multi-split air conditioner described in detail by above-described embodiment
Control method.Control method will not be repeated here referring to the detailed description of above-described embodiment and Figure of description.Institute of the invention is public
The air conditioner opened can reach same technique effect.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. the control method of multi-split air conditioner, it is characterised in that comprise the following steps：
Air conditioner is started shooting, and controller of air conditioner receives design temperature and setting mode of operation；
The designed capacity of each indoor set in open state, and outdoor unit design maximum ability are called, outer machine is calculated
Ability ratio, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+indoor set n designed capacitys）/ room
Outer machine design maximum ability；
The compressor rated frequency stored in controller of air conditioner is called, is gathered residing for each indoor set in open state
The temperature difference of the real-time indoor environment temperature of air-conditioned room, computing environment temperature and design temperature, according to environment temperature and setting temperature
The temperature difference of degree call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Operation mode calls wind speed the weighted value Ki, i of each indoor fan in open state=(1,2 ... n), calculates the actual temperature difference
Weighted value P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/ ∑ Pi, wherein the compression
Machine rated frequency is running frequency when compressor exports rated cooling capacity；
Outdoor controller utilizes the compressor rated frequency, actual temperature difference weighted value, actual wind speed weighted value and outer function
Power is equal to outer function power ratio, compressor rated frequency, actual temperature difference power than calculating compressor operating frequency, compressor operating frequency
The product of weight values and actual wind speed weighted value；
Outdoor controller control compressor is run according to compressor operating frequency, judges that each of which platform is in open state
Whether indoor set environment temperature and the temperature difference of design temperature are less than first amplitude, if the temperature difference of all indoor sets is respectively less than
First amplitude, then control compressor to proceed to setting end cycle according to the compressor operating frequency, judges each
Whether variation tendency of the temperature difference of indoor set in the setting cycle, which meets, imposes a condition；If the temperature of all indoor sets
Variation tendency of the difference in the setting cycle is satisfied by imposing a condition, then outdoor controller pro-active intervention, control reduction compressor
Running frequency operation.
2. the control method of multi-split air conditioner according to claim 1, it is characterised in that judge the temperature difference in setting
During variation tendency in the cycle, controller of air conditioner gathers first temperature signal of setting cycle when starting, and described
The second temperature signal during end cycle is set, if the second temperature signal is less than the first temperature signal and the second temperature signal is more than
Equal to 0, then judge that variation tendency of the temperature difference in the setting cycle is met and impose a condition, the running frequency fortune of reduction compressor
OK.
3. the control method of multi-split air conditioner according to claim 2, it is characterised in that if in setting end cycle
When, second temperature signal is more than the first amplitude, then controls compressor to be run according to compressor operating frequency.
4. the control method of multi-split air conditioner according to claim 3, it is characterised in that if the temperature difference is in setting week
Interim variation tendency meets and imposed a condition, then controls compressor to be run according to frequency of amendment, and the frequency of amendment is compressor
The difference of the integral multiple of running frequency and the first correction value.
5. the control method of multi-split air conditioner according to claim 4, it is characterised in that control compressor successively according to
Multiple frequency of amendments difference circular flow multiple setting unit interval of gradient reduction, and terminate in each setting unit interval
When judge whether the temperature difference is less than first amplitude and more than 0；Wherein, if the temperature difference is less than first amplitude and more than 0, continue to reduce
The frequency of amendment is until the frequency of amendment is equal to compressor minimum frequency；Compressor minimum frequency is minimum defeated for compressor
Go out frequency.
6. the control method of multi-split air conditioner according to claim 5, it is characterised in that the value of the first amplitude
≤1℃。
7. the control method of multi-split air conditioner according to claim 6, it is characterised in that first correction value is
0.5Hz, 1Hz or 2Hz.
8. a kind of multi-split air conditioner control device, it is characterised in that including：
Setup unit, for receiving air conditioner design temperature and setting mode of operation；
First computing unit, the designed capacity for calling each indoor set in open state, and outdoor unit are maximum
Designed capacity, the outer function power ratio of calculating, its China and foreign countries' function power ratio=（The designed capacity of 1 designed capacity of indoor set+indoor set 2+...+room
Interior machine n designed capacitys）/ outdoor unit design maximum ability；
Parameter setting unit, for calling compressor rated frequency, sky residing for each indoor set in open state of collection
The temperature difference of real-time indoor environment temperature between transferring house, computing environment temperature and design temperature, according to environment temperature and design temperature
The temperature difference call each in open state indoor set the temperature difference weighted value Pi, i=(1,2 ... n), according to setting work
Wind speed the weighted value Ki, i of each indoor fan in open state of mode invocation=(1,2 ... n), calculates actual temperature difference power
Weight values P, P=∑（Ki*Pi）/ ∑ Ki, calculates actual wind speed weighted value K, K=∑（Ki*Pi）/∑Pi；Wherein described compressor
Rated frequency is the running frequency that compressor exports rated cooling capacity；
Second computing unit, for utilizing outer function power ratio, compressor rated frequency, actual temperature difference weighted value, actual wind speed power
Weight values calculate compressor operating frequency, and compressor operating frequency is equal to outer function power ratio, compressor rated frequency, actual temperature difference power
The product of weight values and actual wind speed weighted value；
Control unit, for controlling compressor to be run according to compressor operating frequency；
First identifying unit, for when compressor is run according to compressor operating frequency, judging that each of which platform is in start
Whether the indoor set environment temperature of state and the temperature difference of design temperature are respectively less than first amplitude；
First execution unit, for when the temperature difference of all indoor sets is respectively less than first amplitude, control compressor to be according to pressure
Contracting machine running frequency is run to setting end cycle；
Second identifying unit, for judging in the setting cycle, the temperature difference of each indoor set in open state becomes
Whether change trend, which is satisfied by, imposes a condition；
Second execution unit, for being satisfied by setting bar in the difference variation trend of all indoor sets in open state
During part, the running frequency operation of pro-active intervention control reduction compressor.
9. multi-split air conditioner control device according to claim 8, it is characterised in that the second execution unit master
The dynamic process for intervening control reduction compressor operating frequency operation is as follows：
If all temperature difference are respectively less than first amplitude, multiple frequency of amendments that control compressor is reduced according to gradient successively are followed respectively
Inscription of loop multiple setting unit interval, and judge whether the temperature difference is respectively less than first amplitude at the end of each setting unit interval
And more than 0；If the temperature difference is respectively less than first amplitude and more than 0, continue to reduce frequency of amendment until frequency of amendment is equal to compression
Machine minimum frequency；Wherein compressor minimum frequency is the minimum output frequency of compressor.
10. a kind of air conditioner, it is characterised in that using the control of the multi-split air conditioner as described in any one of claim 1 to 7
Method.
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