CN202581682U - Central air-conditioning system - Google Patents
Central air-conditioning system Download PDFInfo
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- CN202581682U CN202581682U CN 201220145925 CN201220145925U CN202581682U CN 202581682 U CN202581682 U CN 202581682U CN 201220145925 CN201220145925 CN 201220145925 CN 201220145925 U CN201220145925 U CN 201220145925U CN 202581682 U CN202581682 U CN 202581682U
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Abstract
The utility model discloses a central air-conditioning system, which comprises a circulating water loop, a plurality of circulating water branch circuits, temperature controllers, tail-end fan coil units, a fresh air processor unit and an air-handling unit, wherein the circulating water branch circuits are arranged in the circulating water loop in parallel; each temperature controller is arranged in each room; the circulating water loop comprises a water inflow main pipe and a returning water main pipe; the circulating water branch circuits comprise water inflow branch pipes and returning water branch pipes; the tail-end fan coil units, the fresh air processor unit and the air-handling unit are respectively arranged on the circulating water branch circuits in parallel; area flow balancing valves used for controlling the flow rate of the returning water branch pipes are respectively arranged on the returning water branch pipes; energy balancing valves are respectively arranged on water return pipes of the tail-end fan coil units; and the energy balancing valves respectively receive signals that are output by tail-end return water temperature sensors on the water return pipes of the tail-end fan coil units and the temperature controllers. The central air-conditioning system has the advantages as follows: the tail ends have uniform heat quantity, and the system is stable; the central air-conditioning system is convenient to perform balance adjustment; the energy consumption is low; and the requirements of comfort and energy conservation can be satisfied at the same time.
Description
Technical field
The utility model relates to central air conditioner system balance regulation technology, especially relates to a kind of heating ventilation air-conditioning system water balance control technique.
Background technology
The main purpose that central air conditioner system is set is in order to obtain comfortable indoor environment; Common central air conditioner system adopts different formula transmission & distribution to arrange circulating water pipework; Several kinds of problems below in use tending to occur: 1, can not always in all terminal rooms, obtain required temperature; After particularly changing appears in the terminal thermic load of Where topical, can not in time be adjusted to required temperature; Even 2 colds or heat output device have under the situation of enough capacity, still phenomenon uneven in temperature can appear in the system; 3, when room temperature reaches desired value, terminal output still can constantly be vibrated; 4, from the near room of water supply trunk line water hammer is appearring often; 5, indoorly had cold or tedious blowing feeling sometimes.
These problems occur and not only can cause comfortableness not good enough, but also cause system energy consumption to increase.The comparatively satisfied system of ruuning situation also can many power consumptions 40%.Trace it to its cause; Mainly be that everywhere water resistance is not quite similar in the needed flow of end equipment and the pipeline that is connected on the pipeline; Assignment of traffic to reality has very big influence; Make discharge fail reasonably to be assigned in the whole water circulating system, have the unbalanced problem of current, cause the generation of " undercurrent " phenomenon in the equipment away from the water supply trunk line near " overcurrent " phenomenon of the equipment of water supply trunk line.
Therefore,, obtain energy-saving effect to greatest extent, must carry out the flow equilibrium regulation and control circulating water loop in order to promote comfortableness.
For the pressure drop in the compensation cycle water lines, reach the effect of balance sysmte pressure, the water-flow circuit with journey transmission & distribution mode (three transmission & distribution pipes are arranged) has appearred adopting.Though this mode makes and supplies, the distance of backwater main institute road warp is equal basically; The on-way resistance that promptly consumes is basic identical, so the resistance of each loop is in a basic balance, but the different relatively formula transmission & distribution of this arrangement; Increased the length of backwater main; The expense material of taking a lot of work consuming time has increased the part investment cost, and the pipeline that increases also certainly will the produce power loss.In addition, owing to be impossible guarantee that all pipeline sections all have identical pressure drop in the actual engineering of construction, therefore actual pressure reduction still can be inconsistent.
To the problems referred to above, the method for pressure balance method control central air conditioning water system circulation has appearred utilizing, and this method is on the basis of different formula transmission & distribution; Install differential pressure balancing valve additional; The aperture of utilizing differential pressure action to come control valve utilizes the change in pressure drop of spool to remedy the variation of pipe resistance, in certain range of flow; The pressure reduction that can control controlled system effectively is constant, thereby still can keep pressure reduction constant basically when making working conditions change.Adopt this mode, differential pressure balancing valve is inner to occur obstruction easily, and each differential pressure balancing valve all needs debugging; The debugging work relative complex of whole system, high to debugging person's experience requirement, and also debugging work is all carried out under static state; After debugging is accomplished; The resistance relative fixed of each differential pressure balancing valve, the variation of adaptive system load at any time can not guarantee the balance of system all the time.Normally carry out system debug with 20 ℃ water in addition, when cooling, common water is under 7 ℃-12 ℃ normal operation, and the hydraulic equilibrium that originally obtains can be kept; But for the water that contains 30% ethylene glycol, under 7 ℃-12 ℃ operating mode, duct pressure loss is big by 4% during than 20 ℃; When heating, average water temperature reaches 60 ℃, and duct pressure loss approximately descends 15%, and the pipeline hydraulic resistance reduces, and original balance can be broken.
Problem to the existence of pressure balance method; Flow-balance controlling method has appearred in recent years; End in different formula distributing system is set up flow balance valve, can eliminate the residual head and the caused flow deviation of pressure oscillation of pipeline automatically directly according to setting the terminal flow of flowing through; No matter how system pressure changes all can keep the terminal flow unchanged of setting; The pipe network Flow-rate adjustment is once accomplished, become simple assignment of traffic to debugging work, solve the hydraulic equilibrium imbalance of pipe network effectively.And flow balance valve is set the flow of each terminal units is consistent, thereby solve original because pipeline was more, static balancing is inaccurate and the influence of water temperature causes the problem of system balancing difficulty.
When system's end is provided with flow balance valve; The setting value of valve control is to load according to the design of this terminal units to choose; The maximum stream flow that is flow balance valve is the negotiable flow of terminal units of living under the maximum planned load condition; Flow balance valve mainly plays the effect of current limliting in actual use, in case the workload demand of terminal units surpasses former design busy hour, just can't go to increase again and flow through the cold medium flux of this terminal units; Cause comfortableness to descend, can't be implemented in the allotment of a regional self-energy.
This shows, select a kind of suitable central air conditioning plant and control method, play important effect for satisfying comfortableness and energy-saving effect simultaneously.
Summary of the invention
The purpose of the utility model provides a kind of central air conditioner system that can take into account comfortableness and energy-conservation requirement.
The technical solution of the utility model is: a kind of central air conditioner system; The water circulating pump, water circulating pump frequency converter, the parallel connection that comprise freezing unit, chilled(cooling) water return (CWR), be arranged on cooling water pump, cooling water pump frequency converter, circulating water loop on the chilled(cooling) water return (CWR), are arranged on the circulating water loop are arranged on the some recirculated water branch roads on the circulating water loop and are arranged on the temperature controller in each room, terminal fan coil, new blower fan group and air-treatment unit; Wherein circulating water loop comprises water inlet manifold and return main; The recirculated water branch road comprises into water arm and return branch; Terminal fan coil, new blower fan group and air processing machine group parallel connection respectively are arranged on the recirculated water branch road; On each said return branch, be respectively equipped with the regional flow balance valve that is used to control the return branch flow; On the return pipe of each said terminal fan coil, be respectively equipped with the energy balance valve, this energy balance valve receives the signal of the terminal return water temperature sensor that is arranged on the said terminal fan coil return pipe and the output of said temperature controller respectively.
The a lot of recirculated water branch roads of meeting parallel connection on the circulating water loop; For example the hotel of multilayer, office etc. use the place of central air conditioner system, and every layer all can be provided with the recirculated water branch road, and the terminal fan coil in each room, new blower fan group and air-treatment unit all are connected in parallel on the recirculated water branch road; Different recirculated water branch roads to water circulating pump outlet distance different; Through setting area flow balance valve on the recirculated water branch road, can detect the circling water flow rate of this recirculated water branch road of flowing through automatically, set flow value control band flow equilibrium valve opening according to arm; Thereby the flow of control recirculated water branch road is no more than arm and sets flow value; Reach the effect of maximum weight feed in certain area coverage, and can effectively solve the contradiction that near-end pressure reduction is big, far-end pressure reduction is little, thereby reduce the systemic circulation water consumption on the whole; Can in time carry out frequency conversion, effectively conserve energy to water circulating pump; The energy balance valve that is provided with on the fan coil endways can be supplied with according to the energy that terminal backwater set temperature value and setting value at room temperature are in time regulated this end; No matter should the interior thermic load of end how to change; Return water temperature that can constant terminal fan coil reaches designing requirement, thereby guarantees that the end heat exchange efficiency is the highest, can satisfy workload demand just; Can in time the heat supply and demand be shifted again, thereby improve the comfortableness of this end.Regional flow balance valve and terminal energy balance valve are combined; Can guarantee the requirement of end comfortableness; Can adapt to the various characteristics of end load variations again; In time thermic load is shifted in certain zone, can also guarantee that the flow of distributing in this zone is no more than design load simultaneously, reach and take into account comfortableness and energy-conservation effect.
On the return pipe of each said new blower fan group and air-treatment unit, be respectively equipped with the energy balance valve, this energy balance valve receives the signal of the terminal return water temperature sensor that is arranged on said new blower fan group, the air-treatment unit return pipe and the output of said temperature controller respectively.Can require the timely energy of regulating new blower fan group and air-treatment unit place to supply with according to terminal return water temperature and room temperature; No matter should the interior thermic load of end how to change; Can constant new blower fan group and the return water temperature of air-treatment unit reach designing requirement; Thereby guarantee that the end heat exchange efficiency is the highest, can satisfy workload demand just, can in time the heat supply and demand be shifted again.
On said return branch, be provided with arm return water temperature sensor, said regional flow balance valve receives the signal of this arm return water temperature sensor output.The zone flow balance valve can further be accepted water temperature and regulate on the basis of current limliting, when thermic load shifts between different recirculated water branch roads, can improve adjusting efficient, shortens to reach balance time and then conserve energy.
On the return pipe of each said new blower fan group and air-treatment unit, be respectively equipped with the terminal flow balance valve that is used to control circling water flow rate, this end flow balance valve receives the signal of the terminal return water temperature sensor that is arranged on said new blower fan group, the air-treatment unit return pipe and the output of said temperature controller respectively.New blower fan group and air-treatment unit belong to large-scale unit, and water consumption is big, has serious Static Water force unbalance problem; Return pipe on terminal flow balance valve is set; Can limit the maximum stream flow of these large-scale end-equipments of flowing through, practice thrift the unnecessary water yield, on the basis that maximum is limited the quantity of; Carry out the adjusting of return water temperature, thereby realize best counterbalance effect.
The utility model has the advantages that: 1, solved the problem uneven in temperature that static state and dynamic unbalance cause, made system more stable, directly controlled to the heat exchange efficiency and air-supply effect of cell end, promoted comfort level;
2, because whole water system obtains balance and carried out VFC, guaranteed that refrigeration unit and water pump with the operation of duty the most efficiently, realize energy-saving effect to greatest extent;
3, reducing the design work amount, use different formula to carry the official website, need not carry out loaded down with trivial details hydraulic equilibrium to pipe network and calculate, reduce design difficulty, is complicated debugging work simplification simple assignment of traffic and energy allotment.
4, as far as unit in charge of construction, same Cheng Guandao need be installed, need not carry out system debug, practice thrift the area and the space of project cost, plenty of time, use, reduce energy consumption, increase economic efficiency.
5, because the flow equilibrium and the energy balance of water system are to carry out automatically, and the changes in temperature operating mode also is automatic conversion, the energy-saving and frequency-variable operation also is to accomplish automatically to regulate, and has stopped the possibility of people for maloperation.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment 1;
Accompanying drawing 2 is the control principle figure of energy balance valve among the utility model embodiment 1;
Accompanying drawing 3 is the structural representation of the utility model embodiment 2;
Accompanying drawing 4 is the control principle figure of regional flow balance valve among the utility model embodiment 2;
Accompanying drawing 5 is the structural representation of the utility model embodiment 3;
Accompanying drawing 6 is the control principle figure of terminal flow balance valve among the utility model embodiment 3;
1, freezing unit, 2, evaporimeter, 3, condenser, 4, water circulating pump, 5, cooling water pump, 6, recirculated water return water temperature sensor; 7, recirculated water inflow temperature sensor, 8, the cold in-water temperature sensor, 9, cooling water return water temperature sensor, 10, regional flow balance valve, 11, water collector; 12, water knockout drum, 13, the air-treatment unit, 14, the room, 15, the energy balance valve, 16, terminal fan coil; 17, new blower fan group, 18, the cooling water pump frequency converter, 19, the water circulating pump frequency converter, 20, cooling tower, 21, differential pressure pickup; 22, by-passing valve, 23, temperature controller, 24, the divided current device, 25, water inlet manifold, 26, the return main; 27, water inlet arm, 28, return branch, 29, terminal return water temperature sensor, 30, arm return water temperature sensor, 31, terminal flow balance valve.
The specific embodiment
Because central air conditioner system is very common, is the prior art common device like equipment such as fan coil, air-treatment unit, freezing unit, water pumps, does not do describing in further detail in the utility model content.
Embodiment 1:
Consult Fig. 1; A kind of central air conditioner system; Comprise freezing unit 1, chilled(cooling) water return (CWR), be arranged on cooling water pump 5, cooling water pump frequency converter 18, the circulating water loop on the chilled(cooling) water return (CWR), water circulating pump 4, water circulating pump frequency converter 19, the parallel connection that is arranged on the circulating water loop is arranged on the some recirculated water branch roads on the circulating water loop and is arranged on temperature controller 23, terminal fan coil 16, new blower fan group 17 and the air-treatment unit 13 in each room 14; Wherein circulating water loop comprises water inlet manifold 25 and return main 26; The recirculated water branch road comprises into water arm 27 and return branch 28; Terminal fan coil 16, new blower fan group 17 and air-treatment unit 13 parallel connection respectively are arranged on the recirculated water branch road; On each said return branch 28, be respectively equipped with the regional flow balance valve 10 that is used to control the return branch flow; On the return pipe of each said terminal fan coil 16, be respectively equipped with energy balance valve 15, this energy balance valve 15 receives respectively and is arranged on said terminal fan coil 16 and beams back terminal return water temperature sensor 29 and the signal of said temperature controller 23 outputs on the water pipe.Be applied in the cooling condition,, divide zones of different according to the characteristics of building; For example with different buildings difference partitions; Or with the different floors zoning of same building thing, setting area flow balance valve 10 on the return branch in zone detects the return branch flow through its built-in flow sensor; And with set the compare aperture of control valve of flow value, make the arm flow restriction in design load.
On the return pipe of the terminal fan coil of each in each regional room 14 16, air-treatment unit 13, new blower fan group 17 energy balance valve 15 is set respectively; Terminal return water temperature sensor 29 is set on the return pipe of each end-equipment; Energy balance valve 15 is at first compared with settings according to terminal return water temperature sensor 29 detected return water temperatures; Controlling opening of valve; The return water temperature that makes the end-equipment water return pipeline is more than or equal to settings, guarantees that the heat exchange supply of terminal fan coil 16, air-treatment unit 13, new blower fan group 17 is consistent with workload demand, at this moment most effective; The instruction fine tuning valve aperture that provides according to room temperature controller 23 then makes terminal flow satisfy the comfortableness requirement.
Consult Fig. 2, be the Principles of Regulation figure of energy balance valve 15, comprising following steps:
A1, terminal backwater water temperature detect, and obtain actual water temperature through terminal return water temperature sensor, get into next step;
A2, judge cold and hot operating mode, get into next step;
A3, select the return water temperature settings, get into next step according to cold and hot operating mode;
A4, comparison actual water temperature and return water temperature settings, and get into next step;
A5, judge whether actual water temperature is less than or equal to settings, in this way, get into the A6 step,, get into the A7 step as not;
A6, output order reduce valve opening, return the A1 step;
A7, accept room temperature controller signal controlling, replacement return water temperature settings is the temperature controller setting value, and gets into next step;
A8, whether judge actual water temperature, in this way, get into the A9 step,, get into the A10 step as not greater than settings;
A9, output order increase valve opening, and return the A1 step;
A10, output order reduce valve opening, and return the A1 step.
Be arranged on and mainly comprise evaporimeter 2 and condenser 3 in the freezing unit 1 on the circulating water loop.The cold in-water temperature sensor 8 that is inserted on condenser 3 inlet pipelines sends to frequency-variable controller 18 to detected water temperature signal with the cooling water return water temperature sensor 9 that is inserted on condenser 3 outlet pipelines; Be positioned at the cooling water pump 5 that is connected with condenser 3 on the circulating water loop, the operating frequency of control cooling water pump 5 by frequency-variable controller 18 output controls again.Same; The recirculated water return water temperature sensor 6 that is inserted on evaporimeter 2 inlet pipelines sends to frequency-variable controller 19 to detected water temperature signal with the recirculated water inflow temperature sensor 7 that is inserted on evaporimeter 2 outlet pipelines; Be positioned at the water circulating pump 4 that is connected with evaporimeter 2 on the circulating water loop, the operating frequency of control water circulating pump 4 by frequency-variable controller 19 output controls again.Be connected cooling tower 20 on the chilled(cooling) water return (CWR) water-cooled after with the condenser heat exchange but.Be connected between water collector 11 and the water knockout drum 12 on the circulating water loop and be connected to differential pressure pickup 21; Divided current device 24 is accepted the signal of differential pressure pickup 21 and temperature sensor 7; Output is controlled at the by-passing valve 22 that is provided with between the confession backwater road, guarantees the safe handling of main frame and the normal operation of pipeline.
Consult Fig. 3; A kind of central air conditioner system; Comprise freezing unit 1, chilled(cooling) water return (CWR), be arranged on cooling water pump 5, cooling water pump frequency converter 18, the circulating water loop on the chilled(cooling) water return (CWR), water circulating pump 4, water circulating pump frequency converter 19, the parallel connection that is arranged on the circulating water loop is arranged on the some recirculated water branch roads on the circulating water loop and is arranged on temperature controller 23, terminal fan coil 16, new blower fan group 17 and the air-treatment unit 13 in each room 14; Wherein circulating water loop comprises water inlet manifold 25 and return main 26; The recirculated water branch road comprises into water arm 27 and return branch 28; Terminal fan coil 16, new blower fan group 17 and air-treatment unit 13 parallel connection respectively are arranged on the recirculated water branch road; On each said return branch 28, be respectively equipped with the regional flow balance valve 10 that is used to control the return branch flow; On the return pipe of each said terminal fan coil 16, be respectively equipped with energy balance valve 15, this energy balance valve 15 receives respectively and is arranged on said terminal fan coil 16 and beams back terminal return water temperature sensor 29 and the signal of said temperature controller 23 outputs on the water pipe.On return branch 28, be provided with arm return water temperature sensor 30, regional flow balance valve 10 receives the signal of these arm return water temperature sensor 30 outputs.
Be applied in the cooling condition,, divide zones of different according to the characteristics of building; For example with different buildings difference partitions; Or with the different floors zoning of same building thing, setting area flow balance valve 10 on the return branch in zone detects the return branch flow through its built-in flow sensor; And with set the compare aperture of control valve of flow value, make the arm flow restriction in design load.
Consult Fig. 3, be the control principle figure of regional flow balance valve, it may further comprise the steps:
Backwater water temperature in B1, the detection return branch is obtained actual water temperature through arm return water temperature sensor, gets into next step;
B2, judge that cold and hot operating mode is set and whether change, in this way, get into the B3 step,, get into the B4 step as not;
B3, select the return water temperature settings, get into the B7 step according to current cold and hot operating mode;
B4, the actual circling water flow rate value of detection, and get into next step;
Whether B5, the actual circling water flow rate value of comparison are less than or equal to settings, in this way, get into the B7 step, as not, get into the B6 step;
B6, output order reduce valve opening, and return the B4 step;
Whether B7, comparison actual water temperature as not, get into B6 step more than or equal to the return water temperature settings, in this way, get into the B8 step;
B8, output order increase valve opening, and return the B1 step.
On the return pipe of the terminal fan coil of each in each regional room 14 16, air-treatment unit 13, new blower fan group 17 energy balance valve 15 is set respectively; Terminal return water temperature sensor 29 is set on the return pipe of each end-equipment; Energy balance valve 15 is at first compared with settings according to terminal return water temperature sensor 29 detected return water temperatures; Controlling opening of valve; The return water temperature that makes the end-equipment water return pipeline is more than or equal to settings, guarantees that the heat exchange supply of terminal fan coil 16, air-treatment unit 13, new blower fan group 17 is consistent with workload demand, at this moment most effective; The instruction fine tuning valve aperture that provides according to room temperature controller 23 then makes terminal flow satisfy the comfortableness requirement.
The Principles of Regulation of energy balance valve 15 are identical with embodiment 1, do not repeat them here.
Be arranged on and mainly comprise evaporimeter 2 and condenser 3 in the freezing unit 1 on the circulating water loop.The cold in-water temperature sensor 8 that is inserted on condenser 3 inlet pipelines sends to frequency-variable controller 18 to detected water temperature signal with the cooling water return water temperature sensor 9 that is inserted on condenser 3 outlet pipelines; Be positioned at the cooling water pump 5 that is connected with condenser 3 on the circulating water loop, the operating frequency of control cooling water pump 5 by frequency-variable controller 18 output controls again.Same; The recirculated water return water temperature sensor 6 that is inserted on evaporimeter 2 inlet pipelines sends to frequency-variable controller 19 to detected water temperature signal with the recirculated water inflow temperature sensor 7 that is inserted on evaporimeter 2 outlet pipelines; Be positioned at the water circulating pump 4 that is connected with evaporimeter 2 on the circulating water loop, the operating frequency of control water circulating pump 4 by frequency-variable controller 19 output controls again.Be connected cooling tower 20 on the chilled(cooling) water return (CWR) water-cooled after with the condenser heat exchange but.Be connected between water collector 11 and the water knockout drum 12 on the circulating water loop and be connected to differential pressure pickup 21; Divided current device 24 is accepted the signal of differential pressure pickup 21 and temperature sensor 7; Output is controlled at the by-passing valve 22 that is provided with between the confession backwater road, guarantees the safe handling of main frame and the normal operation of pipeline.
Embodiment 3:
Consult Fig. 5; Be another central air conditioner system; Comprise freezing unit 1, chilled(cooling) water return (CWR), be arranged on cooling water pump 5, cooling water pump frequency converter 18, the circulating water loop on the chilled(cooling) water return (CWR), water circulating pump 4, water circulating pump frequency converter 19, the parallel connection that is arranged on the circulating water loop is arranged on the some recirculated water branch roads on the circulating water loop and is arranged on temperature controller 23, terminal fan coil 16, new blower fan group 17 and the air-treatment unit 13 in each room 14; Wherein circulating water loop comprises water inlet manifold 25 and return main 26; The recirculated water branch road comprises into water arm 27 and return branch 28; Terminal fan coil 16, new blower fan group 17 and air-treatment unit 13 parallel connection respectively are arranged on the recirculated water branch road; On each said return branch 28, be respectively equipped with the regional flow balance valve 10 that is used to control the return branch flow; On the return pipe of each said terminal fan coil 16, be respectively equipped with energy balance valve 15, this energy balance valve 15 receives respectively and is arranged on said terminal fan coil 16 and beams back terminal return water temperature sensor 29 and the signal of telecommunication of said temperature controller 23 outputs on the water pipe.
Be applied in the cooling condition,, divide zones of different according to the characteristics of building; For example with different buildings difference partitions; Or with the different floors zoning of same building thing, setting area flow balance valve 10 on the return branch in zone detects the return branch flow through its built-in flow sensor; And with set the compare aperture of control valve of flow value, make the arm flow restriction in design load.
On the return pipe of each the terminal fan coil 16 in each regional room 14 energy balance valve 15 is set respectively; On the return pipe of air-treatment unit 13, new blower fan group 17, terminal flow balance valve 31 is set respectively; Terminal return water temperature sensor 29 is set on the return pipe of each end-equipment; Energy balance valve 15 is at first compared with settings according to terminal return water temperature sensor 29 detected return water temperatures, controlling opening of valve, and the return water temperature that makes the end-equipment water return pipeline is more than or equal to settings; Guarantee that terminal fan coil 16 heat exchange supplies are consistent with workload demand; This moment is most effective, and the instruction fine tuning valve aperture that provides according to room temperature controller 23 then makes terminal flow satisfy the comfortableness requirement.
Consult Fig. 6, be the control principle figure of terminal flow balance valve 31, it may further comprise the steps:
Backwater water temperature in C1, the detection return pipe is obtained actual water temperature through terminal return water temperature sensor, gets into next step;
C2, judge that cold and hot operating mode is set and whether change, in this way, get into the C3 step,, get into the C4 step as not;
C3, select the return water temperature settings, get into the C7 step according to current cold and hot operating mode;
C4, the actual circling water flow rate value of detection, and get into next step;
Whether C5, the actual circling water flow rate value of comparison are less than or equal to settings, in this way, get into the C7 step, as not, get into the C6 step;
C6, output order reduce valve opening, and return the C4 step;
Whether C7, comparison actual water temperature are less than or equal to the return water temperature settings, as not, get into the C6 step, in this way, get into the C8 step;
C8, accept room temperature controller signal controlling, replacement return water temperature settings is the temperature controller setting value, and gets into next step;
C9, whether judge actual water temperature, in this way, get into the C10 step,, get into the C11 step as not greater than settings;
C10, output order increase valve opening, and return the C1 step;
C11, output order reduce valve opening, and return the C1 step.
Be arranged on and mainly comprise evaporimeter 2 and condenser 3 in the freezing unit 1 on the circulating water loop.The cold in-water temperature sensor 8 that is inserted on condenser 3 inlet pipelines sends to frequency-variable controller 18 to detected water temperature signal with the cooling water return water temperature sensor 9 that is inserted on condenser 3 outlet pipelines; Be positioned at the cooling water pump 5 that is connected with condenser 3 on the circulating water loop, the operating frequency of control cooling water pump 5 by frequency-variable controller 18 output controls again.Same; The recirculated water return water temperature sensor 6 that is inserted on evaporimeter 2 inlet pipelines sends to frequency-variable controller 19 to detected water temperature signal with the recirculated water inflow temperature sensor 7 that is inserted on evaporimeter 2 outlet pipelines; Be positioned at the water circulating pump 4 that is connected with evaporimeter 2 on the circulating water loop, the operating frequency of control water circulating pump 4 by frequency-variable controller 19 output controls again.Be connected cooling tower 20 on the chilled(cooling) water return (CWR) water-cooled after with the condenser heat exchange but.Be connected between water collector 11 and the water knockout drum 12 on the circulating water loop and be connected to differential pressure pickup 21; Divided current device 24 is accepted the signal of differential pressure pickup 21 and temperature sensor 7; Output is controlled at the by-passing valve 22 that is provided with between the confession backwater road, guarantees the safe handling of main frame and the normal operation of pipeline.
Below further specify the beneficial effect of the utility model through experiment:
Test environment is two-layer commercial office building, comprises hall, meeting room, office and small depot, and central air conditioner system is mainly and satisfies the refrigeration demand in summer, and cooling area is 1740m
2, 151 of resident personnels.Above-mentioned environment is divided into three zones, and hall and meeting room are a district, and office is two districts, and the warehouse is three districts, and each zone is provided with the recirculated water arm respectively, and the terminal fan coil in each room is connected in parallel on respectively on each regional recirculated water arm.The SPV020F80 type zone flow balance valve that the new water chestnut in Guangzhou (Fugang) Air-conditioner cooling Equipment Co., Ltd produces is set, three of quantity on the return branch in zone; The SEV01G20 type energy balance valve that the new water chestnut in Guangzhou (Fugang) Air-conditioner cooling Equipment Co., Ltd produces is set, 24 of quantity on the water return pipeline of each end-equipment; Warm temperature controller is provided with 25 ℃ of temperature in the room, and terminal cooling water temperature is according to 7 ℃ of water inlets, 12 ℃ of settings of backwater; The total flow meter is set on recirculated water is responsible for detects cooling institute water consumption; Water circulating pump and cooling water pump are the GD65-30 type water pump that a wide pump is already produced; Electric energy meter is that the DT862 type three-phase and four-line active electric energy meter that appearance is produced is breathed out in Shanghai, and the model that timer uses Xingling Electrical Co., Ltd. to produce is the Multi-function Time relay of (glad spirit) ZN4896.
Below choosing service data describes:
Experiment 1:
Environment (dried, wet bulb) temperature: 11 are recorded as 30 ℃, 26.9 ℃, and 16 are recorded as 33.5 ℃, 27 ℃,
Under the power frequency, water circulating pump and cooling water pump be power consumption 3.6 degree per hour, move 9 hours every day; Power consumption in one day is 32.4 degree, adopt the utility model method after, power consumption 2.94 degree per hour under the frequency conversion state; Move 9 hours every day; Power consumption in one day 26.46 degree are compared and are saved 5.94 degree, energy-conservation 18.3% under the power frequency state.
Experiment 2:
Environment (dried, wet bulb) temperature: 12 are recorded as 27 ℃, 21.5 ℃, and 15 are recorded as 28.5 ℃, 21.5 ℃, and 17 are recorded as 27.9 ℃, 20.6 ℃
Under the power frequency, water circulating pump and cooling water pump be power consumption 3.6 degree per hour, move 8 hours every day; Power consumption in one day is 28.8 degree, adopt the utility model method after, power consumption 1.75 degree per hour under the frequency conversion state; Move 8 hours every day; Power consumption in one day 14 degree are compared and are saved 14.8 degree/skies, energy-conservation 51.4% under the power frequency state.
Above-listed detailed description is to the specifying of the utility model possible embodiments, and this embodiment is not the claim in order to restriction the utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.
Claims (4)
1. central air conditioner system; The water circulating pump, water circulating pump frequency converter, the parallel connection that comprise freezing unit, chilled(cooling) water return (CWR), be arranged on cooling water pump, cooling water pump frequency converter, circulating water loop on the chilled(cooling) water return (CWR), are arranged on the circulating water loop are arranged on the some recirculated water branch roads on the circulating water loop and are arranged on the temperature controller in each room, terminal fan coil, new blower fan group and air-treatment unit; Wherein circulating water loop comprises water inlet manifold and return main; The recirculated water branch road comprises into water arm and return branch; Terminal fan coil, new blower fan group and air processing machine group parallel connection respectively are arranged on the recirculated water branch road; It is characterized in that: on each said return branch, be respectively equipped with the regional flow balance valve that is used to control the return branch flow; On the return pipe of each said terminal fan coil, be respectively equipped with the energy balance valve, this energy balance valve receives the signal of the terminal return water temperature sensor that is arranged on the said terminal fan coil return pipe and the output of said temperature controller respectively.
2. a kind of central air conditioner system according to claim 1; It is characterized in that: on the return pipe of each said new blower fan group and air-treatment unit, be respectively equipped with the energy balance valve, this energy balance valve receives the signal of the terminal return water temperature sensor that is arranged on said new blower fan group, the air-treatment unit return pipe and the output of said temperature controller respectively.
3. a kind of central air conditioner system according to claim 1 and 2 is characterized in that: on said return branch, be provided with arm return water temperature sensor, said regional flow balance valve receives the signal of arm return water temperature sensor output.
4. a kind of central air conditioner system according to claim 1; It is characterized in that: on the return pipe of each said new blower fan group and air-treatment unit, be respectively equipped with the terminal flow balance valve that is used to control circling water flow rate, this end flow balance valve receives the signal of the terminal return water temperature sensor that is arranged on said new blower fan group, the air-treatment unit return pipe and the output of said temperature controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145925 CN202581682U (en) | 2012-04-06 | 2012-04-06 | Central air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145925 CN202581682U (en) | 2012-04-06 | 2012-04-06 | Central air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202581682U true CN202581682U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220145925 Expired - Lifetime CN202581682U (en) | 2012-04-06 | 2012-04-06 | Central air-conditioning system |
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| Country | Link |
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| CN (1) | CN202581682U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607146A (en) * | 2012-04-06 | 2012-07-25 | 谭仲禧 | Central air-conditioning system and control method thereof |
| CN109163415A (en) * | 2018-07-23 | 2019-01-08 | 成都慧云阵信息技术有限公司 | Central air conditioning water system adjustment method, method for diagnosing faults, running optimizatin method |
| CN112061366A (en) * | 2020-09-21 | 2020-12-11 | 上海欧星空调科技有限公司 | Operation control method of heating and refrigerating system based on double-circulation cooling system |
| CN113063297A (en) * | 2021-04-22 | 2021-07-02 | 山东钢铁集团日照有限公司 | Water quantity balance matching system and matching method for LF refining furnace cover water-cooling coil |
-
2012
- 2012-04-06 CN CN 201220145925 patent/CN202581682U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607146A (en) * | 2012-04-06 | 2012-07-25 | 谭仲禧 | Central air-conditioning system and control method thereof |
| WO2013149507A1 (en) * | 2012-04-06 | 2013-10-10 | Tan Zhongxi | Central air conditioning system and control method therefor |
| CN102607146B (en) * | 2012-04-06 | 2014-09-10 | 谭仲禧 | Central air-conditioning system and control method thereof |
| US9845983B2 (en) | 2012-04-06 | 2017-12-19 | Zhongxi Tan | Central air-conditioning system and control method thereof |
| CN109163415A (en) * | 2018-07-23 | 2019-01-08 | 成都慧云阵信息技术有限公司 | Central air conditioning water system adjustment method, method for diagnosing faults, running optimizatin method |
| CN109163415B (en) * | 2018-07-23 | 2020-12-08 | 成都慧云阵信息技术有限公司 | Debugging method, fault diagnosis method and operation optimization method for central air conditioning water system |
| CN112061366A (en) * | 2020-09-21 | 2020-12-11 | 上海欧星空调科技有限公司 | Operation control method of heating and refrigerating system based on double-circulation cooling system |
| CN113063297A (en) * | 2021-04-22 | 2021-07-02 | 山东钢铁集团日照有限公司 | Water quantity balance matching system and matching method for LF refining furnace cover water-cooling coil |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20140910 |
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| RGAV | Abandon patent right to avoid regrant |