CN107166647A - A kind of multi-connected machine control method and system - Google Patents
A kind of multi-connected machine control method and system Download PDFInfo
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- CN107166647A CN107166647A CN201710356354.3A CN201710356354A CN107166647A CN 107166647 A CN107166647 A CN 107166647A CN 201710356354 A CN201710356354 A CN 201710356354A CN 107166647 A CN107166647 A CN 107166647A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
Abstract
The multi-connected machine control method and system of the present invention, obtain actual environment temperature, design temperature, actual environment humidity, the setting humidity of each start indoor set, calculate the comfort rate of load condensate of each start indoor set, total comfort load is calculated, according to total comfort load adjustment compressor frequency and the expansion valve opening of indoor set；The multi-connected machine control method of the present embodiment, consider temperature, humidity, indoor unit capability number, calculate total comfort load, then according to total comfort load adjustment compressor frequency and the expansion valve opening of start indoor set, both avoided compressor frequency fluctuation frequent, also improve comfort judgment accuracy, improve the comfort of indoor set, realize preferable indoor set comfort, improve the harmony and stability of multi-connected machine, user's satisfaction is improved, the market competitiveness of multi-connected machine is improved.
Description
Technical field
It is to be related to a kind of multi-connected machine control method and system specifically the invention belongs to air-conditioning technical field.
Background technology
In multiple on-line system, a usual outdoor unit connects multiple indoor sets.Each indoor set has an expansion valve, leads to
The aperture for crossing control expansion valve gets in the cold medium flux of machine heat exchanger to adjust, and realizes and is exchanged with the cold and hot amount in the external world.
Environment residing for indoor set is different, and the requirement to air quality is widely different.Judge the comfort of every indoor set
And reach that system is stable within the most short time, the preferable air conditioner surroundings of indoor set are realized, are the keys of multi-connected machine control.
At present, the comfort of indoor set judges simply to consider temperature factor, and comfort judges inaccurate.And each is indoor
The aperture of machine expansion valve is controlled by indoor set oneself, and whole multiple on-line system harmony is poor, and frequently, system is very for frequency fluctuation
Hardly possible is stable.
The content of the invention
The invention provides a kind of multi-connected machine control method, the comfort of indoor set is improved.
In order to solve the above technical problems, the present invention is achieved using following technical proposals：
A kind of multi-connected machine control method, the multi-connected machine includes outdoor unit and multiple indoor sets, in each indoor set and room
Expansion valve is laid with the connecting line of outer machine；The control method includes：
(1) obtain i-th start actual environment temperature Tai of indoor set, design temperature Tsi, actual environment humidity Hai,
Set humidity Hsi, wherein i=1,2,3 ..., N；N is the quantity of start indoor set；
(2) the comfort rate of load condensate Loadi of i-th start indoor set is calculated：
During cooling condition：
During heating condition：
Wherein, x is that weight shared by temperature factor, y are weight shared by humidity factor, x+y=1；
(3) total comfort load is calculated
HPi is the ability number of i-th start indoor set；
(4) expansion valve opening of compressor frequency and indoor set is adjusted according to total comfort load SumLoad.
Further, the expansion valve of the total comfort load SumLoad adjustment compressor frequencies of the basis and indoor set is opened
Degree, is specifically included：
When SumLoad >=first given threshold, compressor frequency is improved, reduces the interior that comfort rate of load condensate is less than 0
The aperture of machine expansion valve；
When SumLoad the second given thresholds of ＜, compressor frequency is reduced, increase comfort rate of load condensate is more than 0 interior
The aperture of machine expansion valve；
When the second given threshold≤SumLoad the first given thresholds of ＜, compressor frequency is constant, reduces comfort load
Rate is less than the aperture of 0 indoor set expansion valve, and increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；
Wherein, the first given threshold ＞ 0, the second given threshold ＜ 0.
Further, when SumLoad >=first given threshold, compressor frequency is improved, is specifically included：
Calculate frequency correction value HzVal=SumLoad* coefficient of frequencies；Wherein coefficient of frequency is the performance parameter of compressor；
The new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor.
Further, when SumLoad >=first given threshold, indoor set of the comfort rate of load condensate less than 0 is reduced swollen
The aperture of swollen valve, is specifically included：
Calculate aperture correction value Vj=Lj*Loadj*Hz1/Hz0；Vj is the aperture amendment of the expansion valve of j-th of indoor set
Value；Lj is the current opening value of the expansion valve of j-th of indoor set；
According to aperture correction value Vj, reduce the expansion valve opening that corresponding comfort rate of load condensate is less than 0 indoor set.
Further, when SumLoad the second given thresholds of ＜, compressor frequency is reduced, is specifically included：
Calculate frequency correction value HzVal=SumLoad* coefficient of frequencies；Wherein coefficient of frequency is the performance parameter of compressor；
The new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor.
It is preferred that, when SumLoad the second given thresholds of ＜, increase comfort rate of load condensate is more than 0 indoor set expansion valve
Aperture, specifically include：
Calculate aperture correction value Vk=Lk*Loadk*Hz0/Hz1；Vk is the aperture amendment of the expansion valve of k-th of indoor set
Value；Lk is the current opening value of the expansion valve of k-th of indoor set；
According to aperture correction value Vk, increase the expansion valve opening that corresponding comfort rate of load condensate is more than 0 indoor set.
Further, when the second given threshold≤SumLoad the first given thresholds of ＜, reduce comfort rate of load condensate and be less than
The aperture of 0 indoor set expansion valve, increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；Specifically include：
Calculate aperture correction valueWherein, ∑ LoadnHPn represents all easypro
Suitable sense rate of load condensate be less than the comfort rate of load condensate of 0 indoor set and ability number product add up and；Vj is j-th of indoor set
The aperture correction value of expansion valve；Lj is the current opening value of the expansion valve of j-th of indoor set；
According to aperture correction value Vj, reduce the expansion valve opening that corresponding comfort rate of load condensate is less than 0 indoor set；
Calculate aperture correction valueWherein, ∑ LoadmHPm represents all
Comfort rate of load condensate be more than comfort rate of load condensate and the ability number product of 0 indoor set add up and；Vk is k-th of indoor set
Expansion valve aperture correction value；Lk is the current opening value of the expansion valve of k-th of indoor set；
According to aperture correction value Vk, increase the expansion valve opening that corresponding comfort rate of load condensate is more than 0 indoor set.
A kind of multi-connected unit control system, including：Acquisition module, for obtaining the actual environment temperature of start indoor set, setting
Constant temperature degree, actual environment humidity, setting humidity；Comfort rate of load condensate computing module, the comfort for calculating start indoor set
Rate of load condensate；Total comfort load calculation module, for calculating total comfort load；Adjusting module, for negative according to total comfort
Lotus adjusts the expansion valve opening of compressor frequency and indoor set.
Further, the adjusting module specifically for：When total comfort load >=first given threshold, compression is improved
Unit frequency, reduces the aperture that comfort rate of load condensate is less than 0 indoor set expansion valve；When the second given thresholds of total comfort load ＜
When, compressor frequency is reduced, increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；When the second given threshold≤
During total comfort load the first given thresholds of ＜, compressor frequency is constant, reduces the indoor set expansion that comfort rate of load condensate is less than 0
The aperture of valve, increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；Wherein, the first given threshold ＞ 0, second
Given threshold ＜ 0.
Compared with prior art, advantages and positive effects of the present invention are：The multi-connected machine control method and system of the present invention,
Actual environment temperature, design temperature, actual environment humidity, the setting humidity of each start indoor set are obtained, each start is calculated
The comfort rate of load condensate of indoor set, calculates total comfort load, according to total comfort load adjustment compressor frequency and indoor set
Expansion valve opening；The multi-connected machine control method of the present embodiment, it is contemplated that temperature, humidity, indoor unit capability number, is calculated total
Comfort load, then according to total comfort load adjustment compressor frequency and the expansion valve opening of start indoor set, was both avoided
Compressor frequency fluctuation is frequent, also improves comfort judgment accuracy, improves the comfort of indoor set, realizes preferably
Indoor set comfort, improves the harmony and stability of multi-connected machine, improves user's satisfaction, improve the market of multi-connected machine
Competitiveness.
After the embodiment that the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Brief description of the drawings
Fig. 1 is the structured flowchart of multi-connected machine；
Fig. 2 is the flow chart of one embodiment of multi-connected machine control method proposed by the invention；
Fig. 3 is the structured flowchart of multi-connected unit control system proposed by the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below with reference to drawings and examples,
The present invention is described in further detail.
Multi-connected machine includes outdoor unit and multiple indoor sets, is laid with the connecting line of each indoor set and outdoor unit
Expansion valve.Expansion valve is typically laid in the liquid pipe of indoor set, and regulation flows into the cold medium flux of indoor set.Each indoor set liquid pipe
It is connected with the liquid pipe of outdoor unit.For example, with reference to shown in Fig. 1, expansion valve 1 is laid with the liquid pipe of machine 1 indoors, indoors machine 2
Liquid pipe on be laid with expansion valve 2, be laid with expansion valve 3 in the liquid pipe of machine 3 indoors ... ..., indoors cloth in machine N liquid pipe
Provided with expansion valve N.
The multi-connected machine control method of the present embodiment, mainly comprises the steps, shown in Figure 2.
Step S1：Obtain the actual environment temperature Tai, design temperature Tsi, actual environment humidity of i-th start indoor set
Hai, setting humidity Hsi, wherein i=1,2,3 ..., N；N is the quantity of start indoor set；
Specifically, actual environment temperature Ta1, design temperature Ts1, the actual environment for obtaining the 1st start indoor set are wet
Spend Ha1, setting humidity Hs1；Actual environment temperature Ta2, design temperature Ts2, the actual environment for obtaining the 2nd start indoor set are wet
Spend Ha2, setting humidity Hs2；Actual environment temperature Ta3, design temperature Ts3, the actual environment for obtaining the 3rd start indoor set are wet
Spend Ha3, setting humidity Hs3；……；Obtain the actual environment temperature TaN, design temperature TsN, reality of N platforms start indoor set
Ambient humidity HaN, setting humidity HsN.
Step S2：Calculate the comfort rate of load condensate Loadi of i-th start indoor set：
During cooling condition：
During heating condition：
Wherein, x is that weight shared by temperature factor, y are weight shared by humidity factor, x+y=1.X, y are according to the realities of each department
Border weather conditions are designed.For example, southern high humidity, humidity influence is big, y can be set to greatly；Northern weather is relatively dry,
Humidity is low, and people are more sensitive to temperature change, and x can be set to greatly.It can be set after x, y value, sent by remote control
Indoor set control panel is given, outdoor unit control panel is sent to through indoor set control panel.
During cooling condition：The comfort rate of load condensate of 1st start indoor set
The comfort rate of load condensate of 2nd start indoor set..., the start of N platforms
The comfort rate of load condensate of indoor set
During heating condition：The comfort rate of load condensate of 1st start indoor set2nd
The comfort rate of load condensate of platform start indoor set..., N platforms start room
The comfort rate of load condensate of interior machine
As Loadi=0, illustrate that i-th indoor set just meets the demand of user；
When Loadi is more than 0, illustrate that i-th indoor set does not meet the demand of user；
When Loadi is less than 0, illustrate that i-th indoor set alreadys exceed the demand of user.
Loadi absolute value representation deviates the degree of desired value, and desired value is 0.
Step S3：Calculate total comfort load
HPi is the ability number of i-th start indoor set.Such as 1HP, 3HP.
SumLoad integrally considers that the capacity of water of every indoor set is different from multi-connected machine, the ability of indoor set with
Adjustable room area is corresponding, and room area is big, and the indoor unit capability of selection will be larger.Therefore, from overall next
Consider, SumLoad calculating needs to increase the ability number factor of indoor set.
Step S4：The expansion valve opening of compressor frequency and indoor set is adjusted according to total comfort load SumLoad.
The frequency of compressor is adjusted according to total comfort load SumLoad, it is to avoid frequency fluctuation is frequent, according to total
Comfort load SumLoad is adjusted to the expansion valve opening for indoor set of starting shooting, and is improved the comfort of indoor set, is improved many
Online harmonious and stability.
The multi-connected machine control method of the present embodiment, obtains actual environment temperature, design temperature, the reality of each start indoor set
Border ambient humidity, setting humidity, calculate the comfort rate of load condensate of each start indoor set, total comfort load are calculated, according to total
The expansion valve opening of comfort load adjustment compressor frequency and indoor set；The multi-connected machine control method of the present embodiment, it is contemplated that
Temperature, humidity, indoor unit capability number, calculate total comfort load, then according to total comfort load adjustment compressor frequency
The expansion valve opening of rate and start indoor set, had both avoided compressor frequency fluctuation frequent, and had also improved comfort judgment accuracy,
The comfort of indoor set is improved, preferable indoor set comfort is realized, the harmony and stability of multi-connected machine is improved, carries
High user's satisfaction, improves the market competitiveness of multi-connected machine.
The expansion valve opening of compressor frequency and indoor set is adjusted according to total comfort load SumLoad, is specifically included down
State content：
First, when SumLoad >=first given threshold, compressor frequency is improved, reduces the room that comfort rate of load condensate is less than 0
The aperture of interior machine expansion valve.First given threshold ＞ 0, such as 0.5.
(1) when SumLoad >=first given threshold, illustrate that multi-connected machine can not meet the demand of user on the whole, because
This needs the frequency for improving compressor of outdoor unit, the ability such as refrigerating/heating, humidification/dehumidifying to improve multi-connected machine, to meet use
The demand at family.
First, frequency correction value HzVal=SumLoad* coefficient of frequencies are calculated.In the present embodiment, coefficient of frequency is represented
Conversion coefficient between compressor load and frequency, is the performance parameter of compressor itself, can be by checking and accepting the specification of compressor
Book is obtained.Coefficient of frequency is more than 0, such as 1.5.
Then, the new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor is calculated.Because SumLoad is more than
0, therefore HzVal is more than 0, compressor frequency rise.
(2) comfort rate of load condensate is less than 0 indoor set, due to alreading exceed the demand of user, when compressor frequency rise
When, it certainly will may proceed to exceed user's request, therefore the expansion valve opening of indoor set of the comfort rate of load condensate less than 0 needs to reduce,
To reduce cold medium flux, comfort rate of load condensate is set to try one's best close to 0, it is to avoid energy waste.
First, aperture correction value Vj=Lj*Loadj*Hz1/Hz0 is calculated；Vj is the aperture of the expansion valve of j-th of indoor set
Correction value；Lj is the current opening value of the expansion valve of j-th of indoor set；Loadj is the comfort rate of load condensate of j-th of indoor set.
In correction value calculating, it is contemplated that the change of compressor frequency, in order to obtain rational correction value, reduce respective chambers machine
Cold medium flux, it is to avoid energy waste.
Then, according to aperture correction value Vj, the expansion valve for reducing the indoor set that corresponding comfort rate of load condensate is less than 0 is opened
Degree.
(3) comfort rate of load condensate is more than 0 indoor set, due to when compressor frequency is raised, refrigeration/system of indoor set
The abilities such as heat, humidification/dehumidifying are improved, and will certainly be reduced comfort rate of load condensate, be made comfort rate of load condensate close to 0, gradually meet
The demand of user, therefore comfort rate of load condensate is more than 0 expansion valve opening of indoor set and do not adjust.
(4) comfort rate of load condensate is equal to 0 indoor set, and due to having met the demand of user, the aperture of expansion valve is not made
Adjustment.
2nd, when SumLoad the second given thresholds of ＜, compressor frequency is reduced, increase comfort rate of load condensate is more than 0 room
The aperture of interior machine expansion valve.Second given threshold ＜ 0, such as -0.5.
(1) when SumLoad the second given thresholds of ＜, illustrate that multi-connected machine alreadys exceed the demand of user on the whole, because
This needs to reduce the frequency of compressor, the ability such as refrigerating/heating, humidification/dehumidifying to reduce multi-connected machine, it is to avoid energy waste.
First, frequency correction value HzVal=SumLoad* coefficient of frequencies are calculated.
Then, the new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor is calculated.Because SumLoad is less than
0, therefore HzVal is less than 0, compressor frequency reduction.
(2) comfort rate of load condensate is more than 0 indoor set, due to being unsatisfactory for user's request, when compressor frequency is reduced, gesture
User's request must be more unsatisfactory for, therefore the expansion valve opening of indoor set of the comfort rate of load condensate more than 0 needs increase, to increase
Plus cold medium flux, comfort rate of load condensate is tried one's best close to 0, compensation is carried due to performance reduction caused by compressor frequency reduction
Rise user's comfort.
First, aperture correction value Vk=Lk*Loadk*Hz0/Hz1 is calculated；Vk is the aperture of the expansion valve of k-th of indoor set
Correction value；Lk is the current opening value of the expansion valve of k-th of indoor set；Loadk is the comfort rate of load condensate of k-th of indoor set.
In correction value calculating, it is contemplated that the change of compressor frequency, in order to obtain rational correction value, increase cold medium flux,
Meet the demand of user.
Then, according to aperture correction value Vk, the expansion valve for increasing the indoor set that corresponding comfort rate of load condensate is more than 0 is opened
Degree.
(3) comfort rate of load condensate is less than 0 indoor set, due to when compressor frequency is reduced, refrigeration/system of indoor set
The abilities such as heat, humidification/dehumidifying are reduced, and will certainly be increased comfort rate of load condensate, be made comfort rate of load condensate close to 0, gradually meet
The demand of user, therefore comfort rate of load condensate is less than 0 expansion valve opening of indoor set and do not adjust.
(4) comfort rate of load condensate is equal to 0 indoor set, and due to having met the demand of user, the aperture of expansion valve is not made
Adjustment.
3rd, when the second given threshold≤SumLoad the first given thresholds of ＜, compressor frequency is constant, reduces comfort
Rate of load condensate is less than the aperture of 0 indoor set expansion valve, and increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve.
(1) when the second given threshold≤SumLoad the first given thresholds of ＜, illustrate that multi-connected machine meets user on the whole
Demand, for keep multi-connected machine stabilization, compressor frequency keep it is constant.
(2) comfort rate of load condensate is less than 0 indoor set, alreadys exceed the demand of user.When compressor frequency is constant, subtract
Small comfort rate of load condensate is less than the aperture of 0 indoor set expansion valve, to reduce cold medium flux, makes comfort rate of load condensate as far as possible to 0
It is close, it is to avoid energy waste.
First, aperture correction value is calculatedWherein, ∑ LoadnHPn is represented
All comfort rate of load condensates be less than comfort rate of load condensate and the ability number product of 0 indoor set add up and；Vj is j-th of Room
The aperture correction value of the expansion valve of interior machine；Lj is the current opening value of the expansion valve of j-th of indoor set；Loadj is indoor j-th
The comfort rate of load condensate of machine, HPj is the ability number of j-th of indoor set.In correction value calculating, it is contemplated that indoor unit capability
The factor of number, in order to obtain rational correction value, reduces the cold medium flux of respective chambers machine, it is to avoid energy waste.
Then, according to aperture correction value Vj, the expansion valve for reducing the indoor set that corresponding comfort rate of load condensate is less than 0 is opened
Degree.
(3) comfort rate of load condensate is more than 0 indoor set, illustrates the demand for being unsatisfactory for user.When compressor frequency is constant,
Increase the aperture that comfort rate of load condensate is more than 0 indoor set expansion valve, to increase cold medium flux, make comfort rate of load condensate as far as possible to
0 is close, lifts user's comfort.
First, aperture correction value is calculatedWherein, ∑ LoadmHPm tables
Show all comfort rate of load condensates be more than comfort rate of load condensate and the ability number product of 0 indoor set add up and；Vk is k-th
The aperture correction value of the expansion valve of indoor set；Lk is the current opening value of the expansion valve of k-th of indoor set；Loadk is k-th of Room
The comfort rate of load condensate of interior machine, HPk is the ability number of k-th of indoor set.In correction value calculating, it is contemplated that compressor frequency
The change of rate, in order to obtain rational correction value, increases cold medium flux, meets the demand of user.
Then, according to aperture correction value Vk, the expansion valve for increasing the indoor set that corresponding comfort rate of load condensate is more than 0 is opened
Degree.
(4) comfort rate of load condensate is equal to 0 indoor set, and due to having met the demand of user, the aperture of expansion valve is not made
Adjustment.
Below, by taking cooling condition as an example, indoor set quantity N=5, x=0.7, y=0.3, the first given threshold of start=
0.5, the second given threshold=- 0.5 exemplified by coefficient of frequency=1.5, is carried out detailed to the specific steps of multi-connected machine control method
Description.
Table one：
(1) Tsi, Tai, His, Hai in x, y and table one, the comfort for calculating i-th start indoor set is born
Lotus rateInsert table one.
(2) calculateThat is SumLoad is more than the first given threshold.
(3) compressor frequency is improved：
Frequency correction value HzVal=SumLoad* coefficient of frequencies=1.3*1.5=1.95Hz.
If current frequency Hz0=50Hz, then the new frequency Hz1=50Hz+1.95Hz=51.95Hz of compressor.
(4) adjustment of indoor set expansion valve opening：
The comfort rate of load condensate Load1=0.3 ＞ 0 of 1# indoor sets, the comfort rate of load condensate Load2=0.16 of 2# indoor sets
＞ 0, therefore the expansion valve opening of 1# and 2# indoor sets do not adjust.
The comfort rate of load condensate Load3=-0.05 ＜ 0 of 3# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction value is ≈ -8 of V3=L3*Load3*Hz1/Hz0=153* (- 0.05) * 51.95/50, new valve opening
For 153-8=145.
The comfort rate of load condensate Load4=-0.06 ＜ 0 of 4# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction value is ≈ -9 of V4=L4*Load4*Hz1/Hz0=142* (- 0.06) * 51.95/50, new valve opening
For 142-9=133.
The comfort rate of load condensate Load5=-0.06 ＜ 0 of 5# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction value is ≈ -6 of V5=L5*Load5*Hz1/Hz0=89* (- 0.06) * 51.95/50, new valve opening
For 89-6=83.
Table two：
(1) Tsi, Tai, His, Hai in x, y and table two, the comfort for calculating i-th start indoor set is born
Lotus rateInsert table two.
(2) calculateThat is -0.5 ＜ SumLoad ＜ 0.5.
(3) compressor frequency is constant.
(4) adjustment of indoor set expansion valve opening：
The comfort rate of load condensate of 1#, 2# indoor set is all higher than 0, it is necessary to increase expansion valve opening；
The comfort rate of load condensate of 3#, 4#, 5# indoor set is respectively less than 0, it is necessary to reduce expansion valve opening.
The comfort rate of load condensate Load1=0.04 ＞ 0 of 1# indoor sets are, it is necessary to increase its expansion valve opening：
Aperture correction valueNew valve opening is 130+3
=133.
The comfort rate of load condensate Load2=0.13 ＞ 0 of 2# indoor sets are, it is necessary to increase its expansion valve opening：
Aperture correction valueNew valve opening is 160+
10=170.
The comfort rate of load condensate Load3=-0.05 ＜ 0 of 3# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction valueNew
Valve opening is 126-3=123.
The comfort rate of load condensate Load4=-0.08 ＜ 0 of 4# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction valueNew
Valve opening is 118-2=116.
The comfort rate of load condensate Load5=-0.06 ＜ 0 of 5# indoor sets are, it is necessary to reduce its expansion valve opening：
Aperture correction valueNew
Valve opening is 76-2=74.
The present embodiment also proposed a kind of multi-connected unit control system, including acquisition module, comfort rate of load condensate computing module,
Total comfort load calculation module, adjusting module etc., it is shown in Figure 3.
Acquisition module, for the actual environment temperature of acquisition start indoor set, design temperature, actual environment humidity, setting
Humidity.
Comfort rate of load condensate computing module, the comfort rate of load condensate for calculating start indoor set.
Total comfort load calculation module, for calculating total comfort load.
Adjusting module, for the expansion valve opening according to total comfort load adjustment compressor frequency and indoor set.
The adjusting module specifically for：When total comfort load >=first given threshold, compressor frequency is improved, is subtracted
Small comfort rate of load condensate is less than the aperture of 0 indoor set expansion valve；When total comfort load the second given thresholds of ＜, reduction pressure
Contracting unit frequency, increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；When the second given threshold≤total comfort is born
During lotus the first given thresholds of ＜, compressor frequency is constant, reduces the aperture that comfort rate of load condensate is less than 0 indoor set expansion valve,
Increase the aperture that comfort rate of load condensate is more than 0 indoor set expansion valve；Wherein, the first given threshold ＞ 0, the second given threshold ＜
0。
The course of work of specific multi-connected unit control system, is described in detail, herein not in above-mentioned multi-connected machine control method
Give and repeating.
The multi-connected unit control system of the present embodiment, obtains actual environment temperature, design temperature, the reality of each start indoor set
Border ambient humidity, setting humidity, calculate the comfort rate of load condensate of each start indoor set, total comfort load are calculated, according to total
The expansion valve opening of comfort load adjustment compressor frequency and indoor set；The multi-connected machine control method of the present embodiment, it is contemplated that
Temperature, humidity, indoor unit capability number, calculate total comfort load, then according to total comfort load adjustment compressor frequency
The expansion valve opening of rate and start indoor set, had both avoided compressor frequency fluctuation frequent, and had also improved comfort judgment accuracy,
The comfort of indoor set is improved, preferable indoor set comfort is realized, the harmony and stability of multi-connected machine is improved, carries
High user's satisfaction, improves the market competitiveness of multi-connected machine.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although with reference to foregoing reality
Apply example the present invention is described in detail, for the person of ordinary skill of the art, can still implement to foregoing
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed or replaced
Change, the essence of appropriate technical solution is departed from the spirit and scope of claimed technical solution of the invention.
Claims (9)
1. a kind of multi-connected machine control method, the multi-connected machine includes outdoor unit and multiple indoor sets, in each indoor set and outdoor
Expansion valve is laid with the connecting line of machine；It is characterized in that：The control method includes：
(1) the actual environment temperature Tai of i-th start indoor set of acquisition, design temperature Tsi, actual environment humidity Hai, setting
Humidity Hsi, wherein i=1,2,3 ..., N；N is the quantity of start indoor set；
(2) the comfort rate of load condensate Loadi of i-th start indoor set is calculated：
During cooling condition：
During heating condition：
Wherein, x is that weight shared by temperature factor, y are weight shared by humidity factor, x+y=1；
(3) total comfort load is calculated
HPi is the ability number of i-th start indoor set；
(4) expansion valve opening of compressor frequency and indoor set is adjusted according to total comfort load SumLoad.
2. multi-connected machine control method according to claim 1, it is characterised in that：The total comfort load of basis
SumLoad adjusts the expansion valve opening of compressor frequency and indoor set, specifically includes：
When SumLoad >=first given threshold, compressor frequency is improved, reduces indoor set of the comfort rate of load condensate less than 0 swollen
The aperture of swollen valve；
When SumLoad the second given thresholds of ＜, compressor frequency is reduced, the indoor set that increase comfort rate of load condensate is more than 0 is swollen
The aperture of swollen valve；
When the second given threshold≤SumLoad the first given thresholds of ＜, compressor frequency is constant, reduces comfort rate of load condensate small
In the aperture of 0 indoor set expansion valve, increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；
Wherein, the first given threshold ＞ 0, the second given threshold ＜ 0.
3. multi-connected machine control method according to claim 2, it is characterised in that：When SumLoad >=first given threshold,
Compressor frequency is improved, is specifically included：
Calculate frequency correction value HzVal=SumLoad* coefficient of frequencies；Wherein coefficient of frequency is the performance parameter of compressor；
The new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor.
4. multi-connected machine control method according to claim 3, it is characterised in that：When SumLoad >=first given threshold,
Reduce the aperture that comfort rate of load condensate is less than 0 indoor set expansion valve, specifically include：
Calculate aperture correction value Vj=Lj*Loadj*Hz1/Hz0；Vj is the aperture correction value of the expansion valve of j-th of indoor set；Lj
For the current opening value of the expansion valve of j-th of indoor set；
According to aperture correction value Vj, reduce the expansion valve opening that corresponding comfort rate of load condensate is less than 0 indoor set.
5. multi-connected machine control method according to claim 2, it is characterised in that：When SumLoad the second given thresholds of ＜,
Compressor frequency is reduced, is specifically included：
Calculate frequency correction value HzVal=SumLoad* coefficient of frequencies；Wherein coefficient of frequency is the performance parameter of compressor；
The new frequency Hz1=current frequencies Hz0+ frequencies correction value HzVal of compressor.
6. multi-connected machine control method according to claim 5, it is characterised in that：When SumLoad the second given thresholds of ＜,
Increase the aperture that comfort rate of load condensate is more than 0 indoor set expansion valve, specifically include：
Calculate aperture correction value Vk=Lk*Loadk*Hz0/Hz1；Vk is the aperture correction value of the expansion valve of k-th of indoor set；Lk
For the current opening value of the expansion valve of k-th of indoor set；
According to aperture correction value Vk, increase the expansion valve opening that corresponding comfort rate of load condensate is more than 0 indoor set.
7. multi-connected machine control method according to claim 2, it is characterised in that：As the second given threshold≤SumLoad ＜
During the first given threshold, reduce the aperture that comfort rate of load condensate is less than 0 indoor set expansion valve, increase comfort rate of load condensate is more than
The aperture of 0 indoor set expansion valve；Specifically include：
Calculate aperture correction valueWherein, ∑ LoadnHPn represents all comforts
Rate of load condensate be less than comfort rate of load condensate and the ability number product of 0 indoor set add up and；Vj is the expansion of j-th of indoor set
The aperture correction value of valve；Lj is the current opening value of the expansion valve of j-th of indoor set；
According to aperture correction value Vj, reduce the expansion valve opening that corresponding comfort rate of load condensate is less than 0 indoor set；
Calculate aperture correction valueWherein, ∑ LoadmHPm represents all comfortable
Feel rate of load condensate be more than 0 indoor set comfort rate of load condensate and ability number product add up and；Vk is the swollen of k-th indoor set
The aperture correction value of swollen valve；Lk is the current opening value of the expansion valve of k-th of indoor set；
According to aperture correction value Vk, increase the expansion valve opening that corresponding comfort rate of load condensate is more than 0 indoor set.
8. a kind of multi-connected unit control system, it is characterised in that：Including：
Acquisition module, actual environment temperature, design temperature, actual environment humidity, setting humidity for obtaining start indoor set；
Comfort rate of load condensate computing module, the comfort rate of load condensate for calculating start indoor set；
Total comfort load calculation module, for calculating total comfort load；
Adjusting module, for the expansion valve opening according to total comfort load adjustment compressor frequency and indoor set.
9. control system according to claim 8, it is characterised in that：The adjusting module specifically for：
When total comfort load >=first given threshold, compressor frequency is improved, reduces the interior that comfort rate of load condensate is less than 0
The aperture of machine expansion valve；
When total comfort load the second given thresholds of ＜, compressor frequency is reduced, increase comfort rate of load condensate is more than 0 interior
The aperture of machine expansion valve；
When the second given threshold≤total comfort load the first given thresholds of ＜, compressor frequency is constant, reduces comfort and bears
Lotus rate is less than the aperture of 0 indoor set expansion valve, and increase comfort rate of load condensate is more than the aperture of 0 indoor set expansion valve；
Wherein, the first given threshold ＞ 0, the second given threshold ＜ 0.
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