CN106225152B - A kind of control method and control device of air-conditioner water system - Google Patents

A kind of control method and control device of air-conditioner water system Download PDF

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CN106225152B
CN106225152B CN201610592428.9A CN201610592428A CN106225152B CN 106225152 B CN106225152 B CN 106225152B CN 201610592428 A CN201610592428 A CN 201610592428A CN 106225152 B CN106225152 B CN 106225152B
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circuit
pressure difference
air
impedance
flow
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CN106225152A (en
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宋志春
孙振华
王亚静
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POLYTRON TECHNOLOGIES Inc
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POLYTRON TECHNOLOGIES Inc
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Abstract

The invention discloses a kind of control method of air-conditioner water system and the control devices of air-conditioner water system, comprising: obtain the air-conditioner water system sets pressure difference as the first pressure difference;According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;If second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to second pressure difference;The water pump in the air-conditioner water system is controlled according to second pressure difference.There is the higher technical problem that consumes energy for solving air-conditioner water system in the prior art in the technical solution provided through the invention.

Description

A kind of control method and control device of air-conditioner water system
Technical field
The present invention relates to air conditioner energy saving control field, in particular to the control method and control dress of a kind of air-conditioner water system It sets.
Background technique
Currently, in large commercial, civil high-rise buildings, the energy consumption of central air conditioner system account about whole building can 60% is even higher.So higher requirements are also raised for efficient operation and energy saving igniter for air-conditioning system.
The energy consumption of central air conditioner system mostlys come from the operation of distributing system, and therefore, the energy conservation of distributing system is got over instantly More be taken seriously, a large amount of electric energy can be saved by the system that pump variable frequency is transformed, but after transformation it is often the case that It is " water pump is not energy-efficient ".Studying carefully its essence is lift surplus, and the control parameter of water system sets unreasonable such as common pressure difference control Mode processed.Set available pressure when either being designed for pressure difference set by cold season, heating season or conditioning in Transition Season for system Difference, a large amount of power are consumed in the resistance devices such as valve or bypass drainage etc..
As it can be seen that in the prior art there is the higher technical problem that consumes energy in air-conditioner water system.
Summary of the invention
The embodiment of the present invention provides the control method and control device of a kind of air-conditioner water system, for solving in the prior art There is the higher technical problem that consumes energy in air-conditioner water system, to reach the technical effect for reducing air-conditioner water system operation energy consumption.
On the one hand, the embodiment of the present application provides a kind of control method of air-conditioner water system, comprising the following steps:
Obtain the air-conditioner water system sets pressure difference as the first pressure difference;
According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
If second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to second pressure difference;
The water pump in the air-conditioner water system is controlled according to second pressure difference.
Optionally, described according to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference, packet It includes:
Obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and corresponding with every circuit Circuit flow, wherein M is the integer greater than zero;
Based on the impedance loop and the circuit flow, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, described to be based on the impedance loop and the circuit flow, obtain the practical pressure of the air-conditioner water system Difference is the second pressure difference, comprising:
Successively take i from 1 to M, obtain in the M circuit first impedance in the first segment circuit in i-th circuit and with institute The corresponding first flow of the first impedance, second impedance in second segment circuit and second flow corresponding with second impedance are stated, The third impedance in third section circuit and third flow corresponding with the third impedance;Wherein, the first segment circuit is described I-th circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is The circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;
Based on first impedance, the first flow, second impedance, the second flow, the third impedance, The third flow obtains i-th pressure difference in the i circuit;
When i is M, the M pressure difference in the M circuit is obtained;
Based on the M pressure difference, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, the first flow, second segment for obtaining the first segment circuit in i-th circuit in the M circuit returns The second flow on road, third section circuit third flow, comprising:
Obtain that the incidence matrix in i-th circuit, quiet inbound traffics, the i item of each node return on i-th circuit The lift in the impedance in each section of circuit and each section of circuit on the road;
It is returned based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and described each section Road lift obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
Optionally, described to be based on the impedance loop and the circuit flow, obtain the practical pressure of the air-conditioner water system Difference is the second pressure difference, comprising:
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is institute State in the circuit of end for the circuit between the return water main pipe in water conduit tube and the end circuit;
Based on the bypass flow and the branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, described according to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference, packet It includes:
Obtain the M leaving water temperature and M return air temperature of M surface air cooler in the air-conditioning system;
The setting pressure difference is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length, with The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, described according to the adjustment of the M leaving water temperature, the M return air temperature and preset pressure step-length Pressure difference is set, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference, comprising:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature be pre- If within the scope of return air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature The setting pressure difference is then added the preset pressure step-length, obtains the sky by degree within the scope of the default return air temperature The actual pressure differential of water transfer system is the second pressure difference;
If N number of leaving water temperature is described beyond the maximum value in the default outlet water temperature range in the M leaving water temperature P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in M return air temperature The preset pressure step-length is gone, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
On the other hand, the embodiment of the present application also provides a kind of control device, comprising:
Processor sets pressure difference as the first pressure difference for obtain the air-conditioner water system;According to prefixed time interval, obtain The actual pressure differential for taking the air-conditioner water system is the second pressure difference;And if second pressure difference is different from first pressure difference, incites somebody to action The setting pressure difference is adjusted to second pressure difference;
Controller is connected to the processor, for according to second pressure difference to the water pump in the air-conditioner water system It is controlled.
Optionally, the processor is used for:
Obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and corresponding with every circuit Circuit flow, wherein M is the integer greater than zero;
Based on the impedance loop and the circuit flow, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, the processor is used for:
Successively take i from 1 to M, obtain in the M circuit first impedance in the first segment circuit in i-th circuit and with institute The corresponding first flow of the first impedance, second impedance in second segment circuit and second flow corresponding with second impedance are stated, The third impedance in third section circuit and third flow corresponding with the third impedance;Wherein, the first segment circuit is described I-th circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is The circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;
Based on first impedance, the first flow, second impedance, the second flow, the third impedance, The third flow obtains i-th pressure difference in the i circuit;
When i is M, the M pressure difference in the M circuit is obtained;
Based on the M pressure difference, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, the processor is used for:
Obtain that the incidence matrix in i-th circuit, quiet inbound traffics, the i item of each node return on i-th circuit The lift in the impedance in each section of circuit and each section of circuit on the road;
It is returned based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and described each section Road lift obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
Optionally, the processor is used for:
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is institute State in the circuit of end for the circuit between the return water main pipe in water conduit tube and the end circuit;
Based on the bypass flow and the branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, the control device further include:
M surface air cooler;
M sensor is connect with the M surface air cooler respectively, for obtaining M surface air cooler in the air-conditioning system M leaving water temperature and M return air temperature;
The processor is used for:
The setting pressure difference is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length, with The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, the processor is used for:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature be pre- If within the scope of return air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature The setting pressure difference is then added the preset pressure step-length, obtains the sky by degree within the scope of the default return air temperature The actual pressure differential of water transfer system is the second pressure difference;
If N number of leaving water temperature is described beyond the maximum value in the default outlet water temperature range in the M leaving water temperature P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in M return air temperature The preset pressure step-length is gone, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects Fruit:
One, due to the technical solution in the embodiment of the present application, obtain the air-conditioner water system sets pressure difference as the first pressure Difference;According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;If second pressure difference and institute The first pressure difference difference is stated, then the setting pressure difference is adjusted to second pressure difference;According to second pressure difference to the air-conditioning Water pump in water system is controlled.Common pressure difference control mode will not be used as in the prior art, water system controls, Such as: main pipe pressure difference or the control of end pressure difference, are either system for pressure difference set by cold season, heating season or conditioning in Transition Season Set available pressure difference when design causes a large amount of power to be consumed in the resistance devices such as valve or bypass drainage, and In the technical scheme, analytical calculation is carried out according to actual operating data, and adjusts air-conditioner water system according to prefixed time interval Setting pressure difference, to reduce the operation energy consumption of air-conditioner water system.It is deposited thus it is possible to effectively solve air-conditioner water system in the prior art In the higher technical problem of energy consumption, and then substantially reduce the technical effect of air-conditioner water system operation energy consumption.
Two, it due to the technical solution in the embodiment of the present application, provides in the embodiment of the present application a variety of for obtaining air-conditioning The method of the actual pressure differential of water system, such as: obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and with The corresponding circuit flow in every circuit, wherein M is the integer greater than zero;It is flowed based on the impedance loop and the circuit Amount, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;Or to obtain M surface air cooler in the air-conditioning system M leaving water temperature and M return air temperature;According to the M leaving water temperature, the M return air temperature and preset pressure step-length The setting pressure difference is adjusted, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference.Those of ordinary skill in the art Any of them acquisition methods can be selected according to system actual design situation, to reach the diversified technology effect of implementation Fruit.
Detailed description of the invention
Fig. 1 is a kind of specific implementation flow chart for control method that the embodiment of the present application one provides;
The specific implementation flow chart of step S102 in a kind of control method that Fig. 2 provides for the embodiment of the present application one;
Fig. 3 is the schematic diagram for the air-conditioner water system that the embodiment of the present application one provides;
The specific implementation flow chart of step S202 in a kind of control method that Fig. 4 provides for the embodiment of the present application one;
The specific implementation flow chart of step S202 in a kind of control method that Fig. 5 provides for the embodiment of the present application one;
The specific implementation flow chart of step S102 in a kind of control method that Fig. 6 provides for the embodiment of the present application one;
Fig. 7 is a kind of structural schematic diagram for control device that the embodiment of the present application two provides.
Specific embodiment
Technical solution provided by the embodiments of the present application, for solving in the prior art, that there are energy consumptions is higher for air-conditioner water system Technical problem, to reach the technical effect for reducing air-conditioner water system operation energy consumption.
Technical solution in the embodiment of the present application is in order to solve the above technical problems, general thought is as follows:
Obtain the air-conditioner water system sets pressure difference as the first pressure difference;
According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
If second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to second pressure difference;
The water pump in the air-conditioner water system is controlled according to second pressure difference.
In above-mentioned technical proposal, obtain the air-conditioner water system sets pressure difference as the first pressure difference;According between preset time Every the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;If second pressure difference is different from first pressure difference, The setting pressure difference is adjusted to second pressure difference;The water pump in the air-conditioner water system is carried out according to second pressure difference Control.It i.e. will not be as in the prior art, water system control uses common pressure difference control mode, such as: main pipe pressure difference or end pressure Difference control, set available pressure when being either system design for pressure difference set by cold season, heating season or conditioning in Transition Season Difference causes a large amount of power to be consumed in the resistance devices such as valve or bypass drainage, and in the technical scheme, according to reality Border operation data carries out analytical calculation, and according to the setting pressure difference of prefixed time interval adjustment air-conditioner water system, to reduce air-conditioning The operation energy consumption of water system.Thus it is possible to effectively solve in the prior art air-conditioner water system there are the higher technical problem of energy consumption, And then substantially reduce the technical effect of air-conditioner water system operation energy consumption.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Referring to FIG. 1, a kind of control method of the air-conditioner water system provided for the embodiment of the present application one, comprising:
S101: obtain the air-conditioner water system sets pressure difference as the first pressure difference;
S102: according to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
S103: if second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to described second Pressure difference;
S104: the water pump in the air-conditioner water system is controlled according to second pressure difference.
A kind of control method of air-conditioner water system provided by the embodiments of the present application can be applied to a kind of central air-conditioning, packet Include but be not limited to large commercial, in civil high-rise buildings.
In the embodiment of the present application, step S101 is first carried out: obtain the air-conditioner water system sets pressure difference as first Pressure difference.
During specific implementation, the pressure for setting pressure difference and being had determined as air-conditioner water system in design of air-conditioner water system Difference, such as: 100Kpa, 120Kpa or 150Kpa, or be other setting pressure difference, those of ordinary skill in the art can basis Actual needs setting, is not especially limited in the embodiment of the present application.
After executing the step S101, S102 is thened follow the steps: according to prefixed time interval, obtaining the air-conditioning water system The actual pressure differential of system is the second pressure difference.
In the embodiment of the present application, prefixed time interval is specifically as follows a season, such as: spring, summer, autumn, winter;It can also be with One month, a season is perhaps 2 hours or is other time interval, those of ordinary skill in the art can be according to reality Border is set, and is not especially limited in the embodiment of the present application.
In the embodiment of the present application, the actual pressure differential of air-conditioner water system is obtained specifically there are two types of implementation, separately below Both implementations are described in detail.
The first implementation, referring to FIG. 2, including the following steps:
S201: obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and with every circuit Corresponding circuit flow, wherein M is the integer greater than zero;
S202: being based on the impedance loop and the circuit flow, and the actual pressure differential for obtaining the air-conditioner water system is the Two pressure differences.
In the embodiment of the present application, step S201 is first carried out: obtaining in the air-conditioner water system every time in M circuit The impedance loop on road and circuit flow corresponding with every circuit, wherein M is the integer greater than zero.
During specific implementation, referring to FIG. 3, being the structural schematic diagram of air-conditioner water system.It include 3 circuits in Fig. 3, Such as: circuit 1, circuit 2 and circuit 3, wherein by taking circuit 1 as an example, including 3 sections, first segment: for water conduit tube;Second segment: return water is dry Pipe;And positioned at for the Duan Zhilu between water conduit tube and return water main pipe.
During specific implementation, the impedance loop and circuit flow in every circuit are obtained, as: first segment is for water conduit tube Water supply trunk tube impedance and flow, the return water trunk tube impedance and flow of second segment return water main pipe, the impedance of third section pipeline section (including Table cold impedance) and valve impedance and corresponding flow.
In the embodiment of the present application, for the actual pressure differential of air-conditioner water system, to different control methods, the tool that uses Body method is different, specifically includes the following two kinds method, both methods is described in detail separately below.
First method, referring to FIG. 4, specifically comprising the following steps:
S401: successively taking i from 1 to M, obtain in the M circuit first impedance in the first segment circuit in i-th circuit and First flow corresponding with first impedance, second impedance in second segment circuit and second corresponding with second impedance Amount, the third impedance in third section circuit and third flow corresponding with the third impedance;Wherein, the first segment circuit is institute State i-th circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, third section circuit For the circuit between water conduit tube and the return water main pipe, i is the integer greater than zero and less than or equal to M;
S402: first impedance, the first flow, second impedance, the second flow, the third are based on Impedance, the third flow, obtain i-th pressure difference in the i circuit;
S403: when i is M, the M pressure difference in the M circuit is obtained;
S404: being based on the M pressure difference, and the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
In the embodiment of the present application, M item is shared, M is for 3, if i is opened from 1 with continued reference to Fig. 3 for step S401 Begin, that is, obtains impedance and the flow of the first segment, second segment and third section in first circuit, three sections of impedance and flow Meaning specific explanations are as above, and details are not described herein again.
After executing the step S401, S402 is thened follow the steps: based on first impedance, the first flow, institute The second impedance, the second flow are stated, the third impedance, the third flow obtain i-th pressure difference in the i circuit.
In the embodiment of the present application, the first impedance is SSi, first flow GWSi;Second impedance is SRi, second flow is GWRi;Third impedance is SBi+SVi+SCi, third flow is GWi
During specific implementation, the specific implementation of calculation used during to(for) each section of the impedance in each circuit Also not identical, it is illustrated separately below.
S in the first impedance, the second impedance and the third impedance of first segment and second segmentViCalculation method, specifically include Following steps:
First step calculates Reynolds number, prejudges fluid type according to Reynolds number.
Re=du ρ/μ
Wherein, d is internal diameter of the pipeline, and unit is millimeter (mm);U is fluids within pipes speed, and ρ is fluid density, and unit is Kilogram every cubic metre (kg/m3);μ is fluid viscosity, and unit is rice pa seconds (mPa.s).If Re is less than or equal to 2000, flowing Type is laminar flow;When Re is more than or equal to 4000, pattern of flow is turbulent flow;When Re is more than or equal to 2000 less than or equal to 4000, flowing Type is transitional region.
Second step selects the absolute roughness of tube wall, calculates relative roughness, column coefficient of friction equation.
If Re is less than or equal to 2000:
λ=64/Re (1)
If Re is more than or equal to 2000 and is more than or equal to 4000 less than or equal to 4000 or Re:
Or
λ=0.0055* (1+ (2000* ε/d+10^6/Re) ^1/3) (3)
Wherein, ε is absolute roughness, and value range is (0.01~0.03).
Third step, computing impedance.
(1)、SBPipe impedance calculates
SPIPE=8 λ l/g π2d5 (4)
Wherein, l is length of pipe, and unit is rice (m);D is pipeline diameter, and unit is rice (m);λ is pipeline frictional resistance Coefficient is calculated using not enlightening formula, specific as follows:
Wherein, Δ is pipeline absolute roughness.
(2)、SVLocal impedance calculates
SLOCAL=8 ξ/g π2d5 (5)
Wherein, ξ is coefficient of partial resistance, only related with the geometry of resistance elements.
(3)、SCSurface air cooler impedance computation
Sc=8344.29*Qc -0.103 (6)
Wherein, QcFor the cold warm water flow of surface air cooler, unit is cube meter per second, (m3/ s), remaining similar to resistances such as evaporators, Equipment circulating resistance range itself can be used.
Further, in the embodiment of the present application, first of the first segment circuit in i-th circuit in the M circuit is obtained Flow, the second flow in second segment circuit, third section circuit third flow, comprising:
Obtain that the incidence matrix in i-th circuit, quiet inbound traffics, the i item of each node return on i-th circuit The lift in the impedance in each section of circuit and each section of circuit on the road;
It is returned based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and described each section Road lift obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
During specific implementation, 7 nodes are shared still by taking Fig. 3 as an example, in figure, 10 sections of branches are (such as: the Arab in figure Number mark), according to graph theory, there is randomly topologically structured air-conditioner water system pipe network can be described as following formula:
Wherein, A is the fundamental interconnection matrix of network management, A=[aij]n×m;G is the m rank column vector of each bypass flow, (G1, G2,…,Gm)T;Q is the n rank vector of the quiet inbound traffics of each node, enters to be positive, be negative out, (Q1,Q2…,Qn)T;P is n section The n rank column vector of point pressure, (P1,P2,…,Pn)T;S is the m rank column vector that each roadlock resists, (S1,S2,…Sm)T;Δ H is each The m rank column vector of road pump lift, (Δ H1, Δ H2..., Δ Hm)T;If i-th section of branch road does not have water pump, Δ Hi=0.
For incidence matrix A, if network as shown in Figure 3 is made of n+1 node and m branch, then A is n × m square Battle array, is defined as follows:
Wherein, it is connected in the fluid of branch j with node i, direction is a when leaving node iij=1;Branch j fluid with Node i is connected, and direction is a when being directed toward node iij=-1;When the fluid and node i of branch j are not attached to, aij=0.
In the above scheme, for n with 6, m for 10, the quiet inbound traffics of each node can be according to the total of air-conditioner water system Flow demand QAlwaysIt is allocated according to node to obtain, wherein QAlways=G1* Δ T* constant coefficient, after the temperature difference is selected, total flow is just It can calculate, G1It is returned and is calculated back by the load of prediction.
The flow of every section of branch can be calculated by formula (7), wherein the also flow just comprising i-th branch.Then The pressure difference in i circuit is thenThus, it is possible to calculate air-conditioning water system Total pressure difference of system are as follows:
Second method, referring to FIG. 5, specifically comprising the following steps:
S501: the bypass flow of the branch in end circuit and branch impedance in the M circuit are obtained, wherein the branch Road is in the end circuit for the circuit between the return water main pipe in water conduit tube and the end circuit;
S502: being based on the bypass flow and the branch impedance, and the actual pressure differential for obtaining the air-conditioner water system is the Two pressure differences.
During specific implementation, the end circuit in M circuit is the circuit between node 5 and node 7 in Fig. 3.M The bypass flow of the branch in end circuit can be found out by the formula (7) in first method in circuit, with GWMIt indicates, end The branch impedance of the branch of end loop can be found out by formula in first method (4), (5), (6), with SVM+SBM+SCMTable Show, here, just repeating no more.
After obtaining bypass flow and branch impedance, then the pressure difference in end circuit can be calculated, specifically:
Δ P2=(SVM+SBM+SCM)×GWM 2 (10)
Second of implementation, referring to FIG. 6, specifically comprising the following steps:
S601: the M leaving water temperature and M return air temperature of M surface air cooler in the air-conditioning system are obtained;
S602: the setting is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length and is pressed Difference, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference.
In the embodiment of the present application, step S601 is first carried out: obtaining M of M surface air cooler in the air-conditioning system Leaving water temperature and M return air temperature.
During specific implementation, temperature sensor can be set in air-conditioner water system, for acquiring air-conditioner water system In M surface air cooler M leaving water temperature and M return air temperature.
In the leaving water temperature for obtaining M surface air cooler with after M return air temperature, thens follow the steps S602: being gone out according to the M Coolant-temperature gage, the M return air temperature and preset pressure step-length adjust the setting pressure difference, to obtain the reality of the air-conditioner water system Border pressure difference is the second pressure difference.
During specific implementation, for the specific implementation process of step S602, specifically comprise the following steps:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature be pre- If within the scope of return air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature The setting pressure difference is then added the preset pressure step-length, obtains the sky by degree within the scope of the default return air temperature The actual pressure differential of water transfer system is the second pressure difference;
If N number of leaving water temperature is described beyond the maximum value in the default outlet water temperature range in the M leaving water temperature P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in M return air temperature The preset pressure step-length is gone, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
In the embodiment of the present application, different reference values can be set according to outdoor weather, such as: meteorological temperature, humidity are lower In the case where, surface air cooler, which presets outlet water temperature range, may be set to 13~15 DEG C, and the default return air temperature range of surface air cooler can be set It is set to 25~27 DEG C.
In the embodiment of the present application, preset pressure step-length is specifically as follows 10Kpa or 12Kpa or 15Kpa, or is it Its pressure difference step-length, as long as those of ordinary skill in the art can carry out according to actual needs ± the 20% of setting pressure difference Setting, is not especially limited in the embodiment of the present application.
In the embodiment of the present application, preset pressure step-length is with 100Kpa, and M for 3, distinguish by 3 leaving water temperatures of acquisition It is 9 DEG C, 10 DEG C or 11 DEG C;3 return air temperatures are 25.5 DEG C, 26 DEG C, 26.5 DEG C.Then successively judge that 3 obtained go out water temperature Whether degree and 3 return air temperatures are within the scope of default outlet water temperature range and default return air temperature.During specific implementation, 3 A leaving water temperature is below 13 DEG C of the minimum in default outlet water temperature range, and 3 return air temperatures are in default return air temperature model In enclosing, and the duration be more than it is predetermined often, such as: half an hour, 1 hour or it is other it is predetermined often, then will setting pressure difference reduce it is pre- If pressure difference step-length, as 90Kpa, conversely, then needing to improve setting pressure difference.
During specific implementation, if 3 leaving water temperatures obtained are 17 DEG C, 14 DEG C, 14.5 DEG C;3 return air temperatures are 29 DEG C, 26 DEG C, 25 DEG C, then there are one 17 DEG C to be higher than default 15 DEG C of outlet water temperature range maximum value, return air temperature in leaving water temperature In there are one 29 DEG C to be higher than default 27 DEG C of return air temperature range maximum value, remaining leaving water temperature, return air temperature are being set out in advance Within the scope of coolant-temperature gage range and default return air temperature, such situation shows that this section of branch hydro-thermal power is uneven, needs to increase air-conditioning Water system pressure difference.
After executing the step S102, S103 is thened follow the steps: if second pressure difference is different from first pressure difference, The setting pressure difference is then adjusted to second pressure difference.
During specific implementation, if what is obtained sets pressure difference as 100Kpa, actual pressure differential 110Kpa and sets pressure difference Setting pressure difference is then adjusted to actual pressure differential by difference, i.e., current sets pressure difference as 110Kpa.
After executing the step S103, S104 is thened follow the steps: according to second pressure difference to the air-conditioner water system In water pump controlled.
In the embodiment of the present application, if after the setting pressure difference of adjustment air-conditioner water system, according to setting pressure difference adjustment Water pump in air-conditioner water system.During specific implementation, if the setting pressure difference of air-conditioner water system is improved, increase air-conditioning The revolving speed or running frequency of water pump in water system;If the setting pressure difference of air-conditioner water system is reduced, air-conditioner water system is reduced The revolving speed or running frequency of middle water pump, to reduce the resistance of pipe network, reduce energy consumption to reduce the revolving speed or running frequency of water pump.
Embodiment two
Referring to FIG. 7, being a kind of control device of air-conditioner water system provided by the embodiments of the present application, comprising:
Processor 70 sets pressure difference as the first pressure difference for obtain the air-conditioner water system;According to prefixed time interval, The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;And if second pressure difference is different from first pressure difference, The setting pressure difference is adjusted to second pressure difference;
Controller 71, is connected to the processor, for according to second pressure difference to the water in the air-conditioner water system Pump is controlled.
Optionally, the processor 70 is used for:
Obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and corresponding with every circuit Circuit flow, wherein M is the integer greater than zero;
Based on the impedance loop and the circuit flow, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, the processor 70 is used for:
Successively take i from 1 to M, obtain in the M circuit first impedance in the first segment circuit in i-th circuit and with institute The corresponding first flow of the first impedance, second impedance in second segment circuit and second flow corresponding with second impedance are stated, The third impedance in third section circuit and third flow corresponding with the third impedance;Wherein, the first segment circuit is described I-th circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is The circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;
Based on first impedance, the first flow, second impedance, the second flow, the third impedance, The third flow obtains i-th pressure difference in the i circuit;
When i is M, the M pressure difference in the M circuit is obtained;
Based on the M pressure difference, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, the processor 70 is used for:
Obtain that the incidence matrix in i-th circuit, quiet inbound traffics, the i item of each node return on i-th circuit The lift in the impedance in each section of circuit and each section of circuit on the road;
It is returned based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and described each section Road lift obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
Optionally, the processor 70 is used for:
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is institute State in the circuit of end for the circuit between the return water main pipe in water conduit tube and the end circuit;
Based on the bypass flow and the branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, the control device further include:
M surface air cooler 72;
M sensor 73 is connect with the M surface air cooler respectively, for obtaining M surface air cooler in the air-conditioning system M leaving water temperature and M return air temperature;
In the embodiment of the present application, sensor 73 is specifically as follows temperature sensor, for acquiring the water outlet of surface air cooler 72 Temperature and return air temperature.
The processor 70 is used for:
The setting pressure difference is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length, with The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, the processor 70 is used for:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature be pre- If within the scope of return air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature The setting pressure difference is then added the preset pressure step-length, obtains the sky by degree within the scope of the default return air temperature The actual pressure differential of water transfer system is the second pressure difference;
If N number of leaving water temperature is described beyond the maximum value in the default outlet water temperature range in the M leaving water temperature P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in M return air temperature The preset pressure step-length is gone, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects Fruit:
One, due to the technical solution in the embodiment of the present application, obtain the air-conditioner water system sets pressure difference as the first pressure Difference;According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;If second pressure difference and institute The first pressure difference difference is stated, then the setting pressure difference is adjusted to second pressure difference;According to second pressure difference to the air-conditioning Water pump in water system is controlled.Common pressure difference control mode will not be used as in the prior art, water system controls, Such as: main pipe pressure difference or the control of end pressure difference, are either system for pressure difference set by cold season, heating season or conditioning in Transition Season Set available pressure difference when design causes a large amount of power to be consumed in the resistance devices such as valve or bypass drainage, and In the technical scheme, analytical calculation is carried out according to actual operating data, and adjusts air-conditioner water system according to prefixed time interval Setting pressure difference, to reduce the operation energy consumption of air-conditioner water system.It is deposited thus it is possible to effectively solve air-conditioner water system in the prior art In the higher technical problem of energy consumption, and then substantially reduce the technical effect of air-conditioner water system operation energy consumption.
Two, it due to the technical solution in the embodiment of the present application, provides in the embodiment of the present application a variety of for obtaining air-conditioning The method of the actual pressure differential of water system, such as: obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and with The corresponding circuit flow in every circuit, wherein M is the integer greater than zero;It is flowed based on the impedance loop and the circuit Amount, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;Or to obtain M surface air cooler in the air-conditioning system M leaving water temperature and M return air temperature;According to the M leaving water temperature, the M return air temperature and preset pressure step-length The setting pressure difference is adjusted, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference.Those of ordinary skill in the art Any of them acquisition methods can be selected according to system actual design situation, to reach the diversified technology effect of implementation Fruit.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Specifically, the corresponding computer program instructions of control method in the embodiment of the present application can be stored in light Disk, hard disk, on the storage mediums such as USB flash disk, when the computer program instructions corresponding with control method in storage medium are by an electronics Equipment reads or is performed, and includes the following steps:
Obtain the air-conditioner water system sets pressure difference as the first pressure difference;
According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
If second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to second pressure difference;
The water pump in the air-conditioner water system is controlled according to second pressure difference.
Stored in the storage medium and step: it is described according to prefixed time interval, obtain the air-conditioner water system Actual pressure differential is the corresponding computer instruction of the second pressure difference during being specifically performed, comprising the following steps:
Obtain in the air-conditioner water system impedance loop in the M circuit circuit Zhong Meitiao and corresponding with every circuit Circuit flow, wherein M is the integer greater than zero;
Based on the impedance loop and the circuit flow, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, stored in the storage medium and step: it is described to be based on the impedance loop and the circuit flow, The actual pressure differential for obtaining the air-conditioner water system is the corresponding computer instruction of the second pressure difference during being specifically performed, including Following steps:
Successively take i from 1 to M, obtain in the M circuit first impedance in the first segment circuit in i-th circuit and with institute The corresponding first flow of the first impedance, second impedance in second segment circuit and second flow corresponding with second impedance are stated, The third impedance in third section circuit and third flow corresponding with the third impedance;Wherein, the first segment circuit is described I-th circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is The circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;
Based on first impedance, the first flow, second impedance, the second flow, the third impedance, The third flow obtains i-th pressure difference in the i circuit;
When i is M, the M pressure difference in the M circuit is obtained;
Based on the M pressure difference, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, stored in the storage medium and step: described to obtain in the M articles of circuit the of i-th article of circuit The first flow in one section of circuit, the second flow in second segment circuit, third section circuit third flow, corresponding computer Instruction is during being specifically performed, comprising the following steps:
Obtain that the incidence matrix in i-th circuit, quiet inbound traffics, the i item of each node return on i-th circuit The lift in the impedance in each section of circuit and each section of circuit on the road;
It is returned based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and described each section Road lift obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
Optionally, stored in the storage medium and step: it is described to be based on the impedance loop and the circuit flow, The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference, and corresponding computer instruction is during being specifically performed, packet Include following steps:
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is institute State in the circuit of end for the circuit between the return water main pipe in water conduit tube and the end circuit;
Based on the bypass flow and the branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure Difference.
Optionally, stored in the storage medium and step: it is described according to prefixed time interval, obtain the air conditioner water The actual pressure differential of system is the second pressure difference, and corresponding computer instruction is during being specifically performed, comprising the following steps:
Obtain the M leaving water temperature and M return air temperature of M surface air cooler in the air-conditioning system;
The setting pressure difference is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length, with The actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
Optionally, stored in the storage medium and step: described according to the M leaving water temperature, the M return air Temperature and preset pressure step-length adjust the setting pressure difference, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference, Corresponding computer instruction is during being specifically performed, comprising the following steps:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature be pre- If within the scope of return air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature The setting pressure difference is then added the preset pressure step-length, obtains the sky by degree within the scope of the default return air temperature The actual pressure differential of water transfer system is the second pressure difference;
If N number of leaving water temperature is described beyond the maximum value in the default outlet water temperature range in the M leaving water temperature P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in M return air temperature The preset pressure step-length is gone, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
The above, above embodiments are only described in detail to the technical solution to the application, but the above implementation The explanation of example is merely used to help understand method and its core concept of the invention, should not be construed as limiting the invention.This In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover Within protection scope of the present invention.

Claims (4)

1. a kind of control method of air-conditioner water system, comprising:
Obtain the air-conditioner water system sets pressure difference as the first pressure difference;
According to prefixed time interval, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
If second pressure difference is different from first pressure difference, the setting pressure difference is adjusted to second pressure difference;
The water pump in the air-conditioner water system is controlled wherein according to second pressure difference, it is described according between preset time Every the actual pressure differential for obtaining the air-conditioner water system is any one of second pressure difference, including following two mode:
First way: it obtains the impedance loop in the M circuit circuit Zhong Meitiao in the air-conditioner water system and is returned with described every The corresponding circuit flow in road, and it is based on the impedance loop and the circuit flow, obtain the reality of the air-conditioner water system Pressure difference is the second pressure difference, and M is the integer greater than zero;
Wherein, described to be based on the impedance loop and the circuit flow, the actual pressure differential for obtaining the air-conditioner water system is the Two pressure differences, comprising:
It successively takes i from 1 to M, obtains in the M articles of circuit first impedance in the first segment circuit in i-th article of circuit and with described The corresponding first flow of one impedance, second impedance in second segment circuit and second flow corresponding with second impedance, third The third impedance of Duan Huilu and third flow corresponding with the third impedance, wherein the first segment circuit is described i-th Circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is the confession Circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;And based on first impedance, The first flow, second impedance, the second flow, the third impedance, the third flow obtain the i item I-th pressure difference in circuit;And when i is M, the M pressure difference in the M circuit is obtained;And it is based on the M pressure difference, obtain institute The actual pressure differential for stating air-conditioner water system is the second pressure difference;
Alternatively,
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is the end In end loop for the circuit between the return water main pipe in water conduit tube and the end circuit;And based on the bypass flow and The branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
The second way: obtaining the M leaving water temperature and M return air temperature of M surface air cooler in the air-conditioner water system, with And the setting pressure difference is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length, to obtain The actual pressure differential for stating air-conditioner water system is the second pressure difference, and M is the integer greater than zero;
Wherein, described that the setting pressure is adjusted according to the M leaving water temperature, the M return air temperature and preset pressure step-length Difference, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference, comprising:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature is being preset back Within the scope of air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature is equal Within the scope of the default return air temperature, then the setting pressure difference is added into the preset pressure step-length, obtain the air conditioner water The actual pressure differential of system is the second pressure difference;
If N number of leaving water temperature is beyond the maximum value in the default outlet water temperature range in the M leaving water temperature, the M is a P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in return air temperature The preset pressure step-length, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
2. the method as described in claim 1, which is characterized in that in the first way, obtain in the M articles of circuit The first flow in the first segment circuit in i circuit, the second flow in second segment circuit, third section circuit third flow, Include:
Obtain the incidence matrix in i-th circuit, quiet inbound traffics of each node on i-th circuit, on the i circuit The impedance in each section of circuit and the lift in each section of circuit;
It is raised based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and each section of circuit Journey obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
3. a kind of control device of air-conditioner water system, comprising:
Processor sets pressure difference as the first pressure difference for obtain the air-conditioner water system;According to prefixed time interval, institute is obtained The actual pressure differential for stating air-conditioner water system is the second pressure difference;And if second pressure difference is different from first pressure difference, will be described Setting pressure difference is adjusted to second pressure difference;
Controller is connected to the processor, for being carried out according to second pressure difference to the water pump in the air-conditioner water system Control;
Wherein, the processor is used to obtain the second pressure difference according to any mode in following two mode:
First way: it obtains the impedance loop in the M circuit circuit Zhong Meitiao in the air-conditioner water system and is returned with described every The corresponding circuit flow in road, and it is based on the impedance loop and the circuit flow, obtain the reality of the air-conditioner water system Pressure difference is the second pressure difference, and M is the integer greater than zero;
In the first way, the processor is used for:
It successively takes i from 1 to M, obtains in the M articles of circuit first impedance in the first segment circuit in i-th article of circuit and with described The corresponding first flow of one impedance, second impedance in second segment circuit and second flow corresponding with second impedance, third The third impedance of Duan Huilu and third flow corresponding with the third impedance;Wherein, the first segment circuit is described i-th Circuit for water conduit tube, the second segment circuit is the return water main pipe in i-th circuit, and third section circuit is the confession Circuit between water conduit tube and the return water main pipe, i are the integer greater than zero and less than or equal to M;And based on first impedance, The first flow, second impedance, the second flow, the third impedance, the third flow obtain the i item I-th pressure difference in circuit;And when i is M, the M pressure difference in the M circuit is obtained;And it is based on the M pressure difference, obtain institute The actual pressure differential for stating air-conditioner water system is the second pressure difference;
Alternatively,
Obtain the bypass flow of the branch in end circuit and branch impedance in the M circuit, wherein the branch is the end In end loop for the circuit between the return water main pipe in water conduit tube and the end circuit;And based on the bypass flow and The branch impedance, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference;
The second way: in the M biography that the control device further includes M surface air cooler and connect respectively with the M surface air cooler When sensor, according to M leaving water temperature of the M surface air cooler obtained with the M sensor, M return air temperature and preset Pressure difference step-length adjusts the setting pressure difference, to obtain the actual pressure differential of the air-conditioner water system as the second pressure difference;
In the second way, the processor is used for:
Determine the M leaving water temperature whether in default outlet water temperature range and whether the M return air temperature is being preset back Within the scope of air temperature;
If the M leaving water temperature is below the minimum value in the default outlet water temperature range, and the M return air temperature is equal Within the scope of the default return air temperature, then the setting pressure difference is added into the preset pressure step-length, obtain the air conditioner water The actual pressure differential of system is the second pressure difference;
If N number of leaving water temperature is beyond the maximum value in the default outlet water temperature range in the M leaving water temperature, the M is a P return air temperature then subtracts the setting pressure difference beyond the maximum value in the default return air temperature range in return air temperature The preset pressure step-length, the actual pressure differential for obtaining the air-conditioner water system is the second pressure difference.
4. control device as claimed in claim 3, which is characterized in that in the first way, the processor is used for:
Obtain the incidence matrix in i-th circuit, quiet inbound traffics of each node on i-th circuit, on the i circuit The impedance in each section of circuit and the lift in each section of circuit;
It is raised based on the incidence matrix, the quiet inbound traffics of each node, the impedance in each section of circuit and each section of circuit Journey obtains first flow, the second flow in second segment circuit and the third flow in third section circuit in first segment circuit.
CN201610592428.9A 2016-07-26 A kind of control method and control device of air-conditioner water system Active CN106225152B (en)

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Application Number Priority Date Filing Date Title
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CN106225152B true CN106225152B (en) 2019-07-16

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CN103994554A (en) * 2014-05-30 2014-08-20 厦门立思科技股份有限公司 Variable pressure difference control device, method and system for air-conditioner
CN105757851A (en) * 2016-03-31 2016-07-13 深圳市新环能科技有限公司 Chilled water flow-variable energy-saving control method and system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102865641A (en) * 2011-07-06 2013-01-09 香港理工大学 Device and method for reverse flow elimination
CN102889664A (en) * 2011-07-19 2013-01-23 香港理工大学 System and method for controlling water discharge
CN102705956A (en) * 2012-06-01 2012-10-03 武汉裕生智能节能设备有限公司 Optimal control device and method for primary pump variable flow system
CN103994554A (en) * 2014-05-30 2014-08-20 厦门立思科技股份有限公司 Variable pressure difference control device, method and system for air-conditioner
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