CN205425171U - Fan coil temperature control device based on air return temperature and delivered air quantity control water valve aperture - Google Patents
Fan coil temperature control device based on air return temperature and delivered air quantity control water valve aperture Download PDFInfo
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- CN205425171U CN205425171U CN201620152592.3U CN201620152592U CN205425171U CN 205425171 U CN205425171 U CN 205425171U CN 201620152592 U CN201620152592 U CN 201620152592U CN 205425171 U CN205425171 U CN 205425171U
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Abstract
The utility model relates to a fan coil temperature control device based on air return temperature and delivered air quantity control water valve aperture, including fan coil, electric water valve, controller and control panel, its characterized in that: control panel has a plurality of control signal output and feedback signal input, is equipped with the fan in fan coil, is equipped with the air return temperature sensor in fan coil's return air entrance, and electric water valve sets up in fan coil's refrigerated water return water pipe, the signal output part of air return temperature sensor, the feedback signal output part of electric water valve aperture, the feedback signal output part of fan rotational speed are connected respectively to each analog signal input of controller, and control signal input, the fan rotational speed control signal input of electric water valve aperture are connected respectively to each analog signal output, by controller electric control valve's aperture and fan rotational speed, form the structure according to air return temperature and air supply volume automatic adjustment fan rotational speed and electric water valve aperture. The utility model discloses the beneficial effect who has improvement freezing water system's stability.
Description
Technical field
This utility model relates to a kind of fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output, belongs to HVAC technical field.
Background technology
Fan coil is the end prod of central air-conditioning, it is made up of heat exchanger, water pipe, filter, fan, drip tray, air bleeding valve and support etc., its operation principle is the air in constantly room, recirculation place in unit, bypass air through after cold water (hot water) coil pipe cooled (heating), to keep the constant of room temperature.
Along with the development of fan coil technology, the field of utilization becomes greatly the most therewith, is now mainly used in some places such as office, hospital, scientific research institution.Fan coil mainly by relying on the positive action of blower fan, is got a desired effect by the effect of surface cooler.
In prior art, the ruuning situation of system is had a great impact by the end heat exchange property of central air-conditioning system.General fan coil, air quantity can artificially regulate, and water route uses electric two-way valve to carry out break-make control.When air intake parameter is fixed, and air quantity is design air flow, only when the water yield and cold are design conditions, import and export the temperature difference and be only designed temperature difference.If discharge reduction, then cold reduces, and imports and exports the temperature difference simultaneously and can be more than designed temperature difference.If the water yield is excessive, then imports and exports the temperature difference and can be less than designed temperature difference.In order to ensure the energy-saving effect of chilled water system, it is necessary for limiting the phenomenon of " big flow, the little temperature difference ", it is ensured that the heat transfer effect of end and rational hydraulic equilibrium performance.
Being limited by the exchange capability of heat of fan coil, when return air temperature is relatively low, owing to heat transfer temperature difference is little, water effluent amount should reduce, and otherwise can cause the super stream of the water yield, reduce the heat-exchanging water temperature difference of this fan coil.Meanwhile, when air output is less, coil heat exchange ability declines, and water effluent amount should reduce, and otherwise can cause the super stream of the water yield, reduce the heat-exchanging water temperature difference of this fan coil.Therefore, time under different return water temperatures, different air output states, the maximum opening of reply water valve has limited.
The fan coil pipe structure of prior art, owing to being not provided with controlling the structure of water valve check according to return air temperature and air output, therefore, heat exchange coil end branch needs to regulate heat exchange amount when, suddenly rapid closing valve is opened, the water heat transfer temperature difference causing water route resistance and this end branch is neglected to rise and is neglected fall, affects the defect of the control stability of whole chilled water system.
Utility model content
The purpose of this utility model, be for solve prior art wind machine coil pipe Inlet and outlet water dynamoelectric water valve aperture is uncontrollable, dynamoelectric water valve is suddenly opened suddenly to close and caused that discharge in fan coil is suddenly big or suddenly small, heat transfer temperature difference is neglected and risen the problem neglected fall, affect the heat exchange stability of chilled water system, it is provided that a kind of based on return air temperature and the fan coil temperature control equipment of air output control water valve aperture.This device controls water valve aperture according to return air temperature and air output, has accurately regulation fan coil water pipe flow, the feature of raising chilled water system stability.
The purpose of this utility model can be reached by following technical scheme:
The fan coil temperature control equipment of water valve aperture is controlled based on return air temperature and air output, including fan coil, dynamoelectric water valve, controller and control panel, its construction features is: control panel has several control signal outfan and feedback signal input terminal, the control signal outfan of control panel connects the control signal input of controller, and the feedback signal input terminal of control panel connects the feedback signal output of controller；Blower fan it is provided with in fan coil, return air temperature sensor it is provided with at the return air inlet of fan coil, it is provided with air output sensor in the air-supply exit of fan coil, air output sensor has air volume test head and air volume signal outfan, and dynamoelectric water valve is arranged in the chilled water water return pipeline of fan coil；Controller has several input end of analog signal, several analog signal outputs, several digital signal input ends and several digital signal output ends；Each input end of analog signal connects the signal output part of return air temperature sensor respectively, the feedback signal output of dynamoelectric water valve aperture, the feedback signal output of rotation speed of fan and the air volume signal outfan of air output sensor, each analog signal output connects the control signal input of dynamoelectric water valve aperture respectively, rotation speed of fan control signal input, each digital quantity input connecting fan respectively opens/stops status signal output, manual/auto status signal output, failure alarm signal outfan, digital output end connecting fan respectively opens/stops control signal input, manual/auto changeover control signal input；Design temperature is inputted by control panel, the temperature data fed back according to return air temperature sensor by controller contrasts with setting air output signal with difference and the air output feedback signal of design temperature, control aperture and the rotation speed of fan of dynamoelectric water valve, formed and automatically adjust rotation speed of fan and the structure of dynamoelectric water valve aperture according to return air temperature and air output.
The purpose of this utility model can also be reached by following technical scheme:
Further, control panel is provided with display screen and operation button, operation button is as manual ringing input, the input setting value of room temperature, the spacing value of dynamoelectric water valve aperture and arrange air output, display screen is one or more for showing that current indoor temperature, design temperature, fan coil open/stop in state and air force information.
Further, controller is provided with multiple I/O port, wherein, analog input port AI includes return air temperature signal input part, dynamoelectric water valve open degree feedback signal input part, rotation speed of fan feedback signal input terminal, analog output port AO includes dynamoelectric water valve opening control signal outfan, rotation speed of fan control signal outfan, digital quantity input port DI includes blower fan start and stop state signal input terminal, manual auto state signal input part, failure alarm signal input, digital output port DO includes blower fan on off control signal output part, the most automatically changeover control signal outfan.
Further, the input/output between control panel and controller is directly connected to or is connected by RS485 communication interface.
Further, described control panel can press key assignments room temperature, air output and dynamoelectric water valve check value by input；Controller is according to current return air temperature and the deviation of the setting value of room temperature, after utilizing built-in PID arithmetic to process, operation result is sent to as control signal the control input of dynamoelectric water valve, it is made to carry out synchronization action, control indoor temperature, and when regulating dynamoelectric water valve, maximum opening is not more than the check that control panel end sets.
Further, described dynamoelectric water valve is electric control valve, and its power supply is directly supplied by controller power source, and valve opening is regulated by controller.
Further, described blower fan is direct current brushless motor or frequency conversion fan, and when fan coil normally works, fan static pressure is 10～50Pa, and fan static pressure maximum is less than 100Pa.
Further, control panel together constitutes, with the signal transmission of signal transmission, controller AI and the AO port of controller, the signal transmission structure that device runs automatically.
Further, the check that described return air temperature is corresponding with air output, actual air output inputted in controller by control panel as statistical standard, water valve check with the ratio of blower fan maximum quantity of wind and the deviation value of return air temperature and design temperature.
Further, the check relation that described return air temperature is corresponding with air output, is to add up according to room load situation, air conditioning water system situation and water valve hydraulic characteristic(s) to draw.
This utility model has a beneficial effect highlighted below:
1, this utility model is provided with return air temperature sensor at fan coil return air inlet, is provided with blower fan in fan coil；The maximum being controlled dynamoelectric water valve aperture according to return air temperature and air output by controller is spacing, to control the aperture regulation of dynamoelectric water valve in the range of check；Controller is by detecting the output signal of return air temperature sensor, it is judged that indoor temperature and the deviation of design temperature, carries out with the aperture regulation and rotation speed of fan regulation synchronization controlling dynamoelectric water valve；Temperature sets and is inputted by control panel and be sent to controller, the data that controller feeds back according to return air temperature sensor determine indoor temperature, and desired temperature and the indoor temperature data of acquisition are compared process, obtain rotation speed of fan control signal and dynamoelectric water valve aperture, constitute the fan coil temperature control system being automatically adjusted rotation speed of fan and dynamoelectric water valve aperture according to the deviation of indoor temperature and desired temperature；Therefore, it is possible to the water heat transfer temperature difference solving resistance and this end branch that existing fan coil pipe structure exists water route is neglected and risen the problem suddenly dropping, affecting the control stability of whole chilled water system, there is the beneficial effect accurately regulating fan coil water pipe flow, improving the stability of chilled water system.
2, utilize the relation of return air temperature and air output, determine that the maximum opening that dynamoelectric water valve aperture sets is spacing, be prevented effectively from the chilled water phenomenon of " big flow; the little temperature difference ", while ensureing to provide the heat exchange amount needed, the chilled-water flow of fan coil is relatively low, chilled water system good energy-conserving effect.
3, on the basis of limiting dynamoelectric water valve maximum opening, controller adjusts dynamoelectric water valve aperture and rotation speed of fan further according to the ambient temperature of change, improve the heat transfer temperature difference of chilled water system, and turn avoid chilled-water flow beyond demand, the effectively traditional water valve of solution is suddenly opened and is suddenly closed the water heat transfer temperature difference the caused fall suddenly of liter suddenly, heat-exchange performance is stable, and the chilled water temperature difference is relatively big, and heat exchange property is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of a specific embodiment of the present utility model.
Detailed description of the invention
With specific embodiment, embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Specific embodiment 1:
With reference to Fig. 1, the present embodiment includes fan coil 1, dynamoelectric water valve 2, controller 3 and control panel 4；Control panel 4 has several control signal outfan and feedback signal input terminal, and the control signal outfan of control panel 4 connects the control signal input of controller 3, and the feedback signal input terminal of control panel 4 connects the feedback signal output of controller 3；It is provided with blower fan in fan coil 1, return air temperature sensor 5 it is provided with at the return air inlet of fan coil 1, it is provided with air output sensor in the air-supply exit of fan coil 1, air output sensor has air volume test head and air volume signal outfan, and dynamoelectric water valve 2 is arranged in the chilled water water return pipeline of fan coil 1；Controller 3 has several input end of analog signal, several analog signal outputs, several digital signal input ends and several digital signal output ends；Each input end of analog signal connects the signal output part of return air temperature sensor 5 respectively, the feedback signal output of dynamoelectric water valve 2 aperture, the feedback signal output of rotation speed of fan and the air volume signal outfan of air output sensor, each analog signal output connects the control signal input of dynamoelectric water valve 2 aperture respectively, rotation speed of fan control signal input, each digital quantity input connecting fan respectively opens/stops status signal output, manual/auto status signal output, failure alarm signal outfan, digital output end connecting fan respectively opens/stops control signal input, manual/auto changeover control signal input；Design temperature is inputted by control panel 4, the temperature data fed back according to return air temperature sensor 5 by controller 3 contrasts with setting air output signal with difference and the air output feedback signal of design temperature, control aperture and the rotation speed of fan of dynamoelectric water valve 2, formed and automatically adjust rotation speed of fan and the structure of dynamoelectric water valve 2 aperture according to return air temperature and air output.
In the present embodiment:
Control panel 4 is provided with display screen and operation button, operation button is as manual ringing input, the input setting value of room temperature, the spacing value of dynamoelectric water valve 2 aperture and arrange air output, display screen is one or more for showing that current indoor temperature, design temperature, fan coil 1 open/stop in state and air force information.
Fan coil 1 uses the fan coil of routine techniques, dynamoelectric water valve 2 uses motorized adjustment water valve in routine techniques, controller 3 uses field controller or the singlechip controller of routine techniques, and control panel 4 uses the display screen of several function signals of routine techniques band input button to constitute.
The monitoring of all parts be can be displayed on control panel 4 by controller 3, control panel 4 is made up of display screen and operation button, can be by operation button design temperature, also can be by operation key-press input control signal, as to the on off control of blower fan, manual auto-changeover control etc.；Display screen can show multiple data simultaneously, such as room Current Temperatures, design temperature, fan coil 1 start and stop state, air force and dynamoelectric water valve 2 aperture, also can arrange and only show one of which；Input/output between control panel 4 and controller 3 is directly connected to or is connected by RS485 communication interface.
For convenience of operator, the debugging detection of device is also had statistic etc., key assignments room temperature, air output and dynamoelectric water valve 2 check value can be pressed by the input of control panel 4.Under different return air temperatures and air output, different dynamoelectric water valve 2 check values is set, device operation efficiency data under different dynamoelectric water valve 2 check can be counted；At the check that control panel 4 end sets with debud mode, after being sent to controller 3, controller 3 is according to current return air temperature and the deviation of the setting value of room temperature, after utilizing built-in PID arithmetic to process, operation result is sent to the control input of dynamoelectric water valve 2 so that it is carry out synchronization action as control signal, controls indoor temperature, and when regulating dynamoelectric water valve 2, maximum opening is not more than the check that control panel 4 end sets.
Controller 3 carries multiple signal transmission port, and wherein analog signals transmission port includes that AI and AO two kinds, digital quantity signal transmission port include DI and DO two kinds.Analog input port AI includes return air temperature signal input part, dynamoelectric water valve 2 open degree feedback signal input part, rotation speed of fan feedback signal input terminal, analog output port AO includes dynamoelectric water valve 2 opening control signal outfan, rotation speed of fan control signal outfan, digital quantity input port DI includes blower fan start and stop state signal input terminal, manual auto state signal input part, failure alarm signal input, and digital output port DO includes blower fan on off control signal output part, the most automatically changeover control signal outfan.
The annexation of each signal transmission port includes, return air temperature sensor 5 signal output part, blower motor tach signal outfan and dynamoelectric water valve 2 opening amount signal outfan connect controller 3AI signal input port；Blower motor inverter control signal input and dynamoelectric water valve 2 aperture control input and connect controller 3AO signal output port；Blower fan on off controller 3 signal output part, manual automatic switchover device signal output part and automatic alarm for fault signal output part connect controller 3DI signal input part；Blower fan on off controller 3 signal input part and manual automatic switchover device signal input part connect controller 3DO signal output part (for simplifying utility model structure, the prior art such as alarm, manual automatic switchover device not shown in accompanying drawing).
Controller 3 can receive return air temperature sensor 5 measured value, blower motor rotary speed data and dynamoelectric water valve 2 aperture data by AI signal transmission port；Send control signal by AO signal transmission port and control blower fan speed change and dynamoelectric water valve 2 aperture；Can the start and stop state of supervising device, manual automatic control state and the running status of automatic alarm for fault by DI port；Export control signal by DO port, blower fan is started or stoped, is manually or automatically controlled switching.
When the indoor temperature that air conditioning system records is not up to design temperature, controller 3 will be circulated action control variations in temperature.The signal transmission of signal transmission, controller 3AI and the AO port of control panel 4 and controller 3 together constitutes the signal transmission structure of device automatic cycling operating.The signal transmission structure of device automatic cycling operating, provides lasting variable signal source for device at automatic cycling operating and adaptation environmental change, makes device can automatically adjust self operating state according to variable signal.Controller 3, when calculating rotation speed of fan and dynamoelectric water valve 2 aperture, is determined indoor temperature according to the data of return air temperature sensor 5 feedback, and utilizes the deviation value of indoor environment temperature and design temperature to be obtained by PID arithmetic.Return air temperature sensor 5 test constantly indoor environment temperature to controller 3 feedback data during work, when indoor environment temperature changes, controller 3 re-starts the calculating of indoor temperature and design temperature deviation value, and utilize new deviation value to carry out PID arithmetic process, obtain new rotation speed of fan control signal and dynamoelectric water valve 2 opening control signal, readjust rotation speed of fan and the aperture of dynamoelectric water valve 2, reach according to the running of indoor temperature change generated in case automatic regulating apparatus to improve the effect of chilled water system stability.
The check that return air temperature is corresponding with air output, by the deviation value of actual air output and the ratio of blower fan maximum quantity of wind and return air temperature and design temperature as statistical standard, add up according to room load situation, air conditioning water system situation and water valve hydraulic characteristic(s) and draw.Water valve check inputs in controller 3 by control panel 4 before device works, controller 3 persistently sends valve opening control signal according to variation of ambient temperature, owing to variation of ambient temperature speed is slower, the valve opening changed therewith the most slowly adjusts, guarantee that valve opening rate of change is relatively low, it is prevented effectively from valve and suddenly opens the situation generation of rapid pass, guarantee that water pipe end branch heat transfer temperature difference will not rise suddenly suddenly to drop, improve the heat exchange stability of chilled water system, simultaneously, valve is when regulating aperture, and valve maximum opening is not more than check.
Blower fan in fan coil 1 is direct current brushless motor or frequency conversion fan, so that the adjustment that controller 3 is to rotation speed of fan, when fan coil 1 normally works, fan static pressure is 10-50Pa, and fan static pressure maximum is less than 100Pa, it is ensured that the safety and stability of device work.
Dynamoelectric water valve 2 is electric control valve, can be changed the aperture of valve, and then the negotiability of control valve by the signal of telecommunication, controls to enter the water yield of heat exchange coil.In actual application, flow detection head can be set at the water outlet of dynamoelectric water valve, detect the flow of dynamoelectric water valve by flow detection head and deliver to the flow feedback input of controller 3, controller judging the aperture of dynamoelectric water valve 2 according to flow.
It is FC800 that the present embodiment applies fan coil 1 model, and under GB operating mode, during middle-grade air quantity, cold is 6550W, and heat is 9260W, and rotation speed of fan is adjustable, and blower fan maximum quantity of wind is 1360m3/h.Being designed for backwater temperature difference is 5 degree.The water valve check relation table that return air temperature, air output are corresponding is as follows:
Water valve check (%) value table
When the deviation of return air temperature and design temperature is less than 1 degree, actual air output be less than with the ratio of maximum quantity of wind 33% corresponding water valve check be 10%, be less than 66% corresponding water valve check more than 33% be 15%, the water valve check corresponding more than 66% is 25%；When the deviation of return air temperature and design temperature more than 1 degree less than 3 degree time, actual air output be less than with the ratio of maximum quantity of wind 33% corresponding water valve check be 25%, be less than 66% corresponding water valve check more than 33% be 40%, the water valve check corresponding more than 66% is 50%；When the deviation of return air temperature and design temperature more than 3 degree less than 5 degree time, actual air output be less than with the ratio of maximum quantity of wind 33% corresponding water valve check be 40%, be less than 66% corresponding water valve check more than 33% be 60%, the water valve check corresponding more than 66% is 75%；When the deviation of return air temperature and design temperature is more than or equal to 5 degree, actual air output be less than with the ratio of maximum quantity of wind 33% corresponding water valve check be 60%, be less than 66% corresponding water valve check more than 33% be 80%, the water valve check corresponding more than 66% is 100%；
nullSet indoor temperature，If setting value is 25 degree，Assume that now indoor temperature is 29 degree，Controller 3 is according to current return air temperature and the deviation of the setting value of room temperature，I.e. 4 degree，After utilizing PID arithmetic to process，Obtain rotation speed of fan control signal and dynamoelectric water valve 2 opening control signal，It is simultaneously sent to blower fan speed changing structure，Such as converter and dynamoelectric water valve 2，Control blower fan speed change and dynamoelectric water valve 2 aperture simultaneously，Control blower fan running speed and i.e. determine actual air output，Dynamoelectric water valve 2 check of correspondence is determined according to relation table，The aperture regulation simultaneously making dynamoelectric water valve 2 is not more than check，Owing to limiting the maximum opening of dynamoelectric water valve 2，I.e. limit chilled water maximum flow of water amount，Guarantee that the fan coil 1 intake-outlet temperature difference will not be less than designed temperature difference，Heat transfer effect and the hydraulic equilibrium performance of chilled water system are ensured.
Applicant is actually used to be shown:
Fan coil supplies, backwater temperature difference is certain, and supply water temperature is the highest, and refrigerating capacity amount of decrease is the biggest, and dehumidifying effect declines.Fan coil air quantity is certain, supply water temperature is certain, during output change, refrigerating capacity changes with the change of output, add up according to part fan coil pipe properties of product, when supply water temperature is 7 DEG C, when output is reduced to 80%, refrigerating capacity is original about 92%, illustrates that when output changes the impact on refrigerating capacity is the slowest.
Fan coil supplies, backwater temperature difference is certain, and when supply water temperature raises, refrigerating capacity is along with minimizing, and according to statistics, when supply water temperature raises 1 DEG C, refrigerating capacity reduces about 10%, and supply water temperature is the highest, and amount of decrease is the biggest, dehumidifying effect decline.
Water supply conditions is certain, and when fan coil air quantity changes, refrigerating capacity and air-treatment enthalpy difference are along with change, and usually refrigerating capacity reduces, and enthalpy difference increases, and specific refrigerating effect blower fan power consumption change is little.
When the fan coil water-in and water-out temperature difference increases, discharge reduction, the heat transfer coefficient of heat exchange coil is along with reduction.It addition, heat transfer temperature difference also there occurs change, therefore, the refrigerating capacity of fan coil reduces with the increase of supply backwater temperature difference, is 7 DEG C when supply water temperature according to statistics, and for, backwater temperature difference in time bringing up to 7 DEG C for 5 DEG C, refrigerating capacity can reduce about 17%.
Thermal environment condition refers to the comprehensive function that the thermal comfort of human body is occurred by physical parameter.These physical parameters mainly include the relative humidity of air dry-bulb temperature, air, speed air flow, mean radiant temperature, the metabolism amount of human body and clothing etc. six.Wherein, temperature and the flowing velocity of air is to evaluate the important parameter of the thermal environment comfort conditions that fan coil is provided.
Specific embodiment 2:
It is FC600 that the present embodiment applies fan coil 1 model, and under GB operating mode, during middle-grade air quantity, cold is 4850W, and heat is 6850W, and rotation speed of fan is adjustable, and blower fan maximum quantity of wind is 1020m3/h.Being designed for backwater temperature difference is 5 degree.The water valve check relation table that return air temperature, air output are corresponding is as follows:
Water valve check (%) value table
When the deviation of return air temperature and design temperature is less than 1.5 degree, actual air output and the ratio of maximum quantity of wind less than 25% corresponding water valve check be 10%, be less than 50% corresponding water valve check more than 25% be 15%, be less than 75 corresponding water valve check more than 50% is 15%, the water valve check corresponding more than 75% is 20%；When the deviation of return air temperature and design temperature more than 1.5 degree less than 3.5 degree time, actual air output be less than with the ratio of maximum quantity of wind 25% corresponding water valve check be 25%, be less than 50% corresponding water valve check more than 25% be 30%, be less than 75% corresponding water valve check more than 50% is 35%, the water valve check corresponding more than 75% is 40%；When the deviation of return air temperature and design temperature more than 3.5 degree less than 5.5 degree time, actual air output be less than with the ratio of maximum quantity of wind 25% corresponding water valve check be 40%, be less than 50% corresponding water valve check more than 25% be 45%, be less than 75% corresponding water valve check more than 50% is 55%, the water valve check corresponding more than 75% is 60%；When the deviation of return air temperature and design temperature more than 5.5 degree less than 7.5 degree time, actual air output be less than with the ratio of maximum quantity of wind 25% corresponding water valve check be 60%, be less than 50% corresponding water valve check more than 25% be 65%, be less than 75% corresponding water valve check more than 50% is 75%, the water valve check corresponding more than 75% is 80%；When the deviation of return air temperature and design temperature is more than 7.5 degree, actual air output be less than with the ratio of maximum quantity of wind 25% corresponding water valve check be 80%, be less than 50% corresponding water valve check more than 25% be 85%, be less than 75% corresponding water valve check more than 50% is 95%, the water valve check corresponding more than 75% is 100%.
nullSet indoor temperature，If setting value is 20 degree，Assume that now indoor temperature is 26 degree，Controller 3 is according to current return air temperature and the deviation of the setting value of room temperature，I.e. 6 degree，After utilizing PID arithmetic to process，Obtain rotation speed of fan control signal and dynamoelectric water valve 2 opening control signal，It is simultaneously sent to blower fan speed changing structure，Such as converter and dynamoelectric water valve 2，Control blower fan speed change and dynamoelectric water valve 2 aperture simultaneously，Control blower fan running speed and i.e. determine actual air output，Dynamoelectric water valve 2 check of correspondence is determined according to relation table，The aperture regulation simultaneously making dynamoelectric water valve 2 is not more than check，Owing to limiting the maximum opening of dynamoelectric water valve 2，I.e. limit chilled water maximum flow of water amount，Guarantee that the fan coil 1 intake-outlet temperature difference will not be less than designed temperature difference，Heat transfer effect and the hydraulic equilibrium performance of chilled water system are ensured.
This utility model is in use, controller 3 is less than check all the time to automatically adjusting of dynamoelectric water valve 2, effectively control the fan coil 1 Inlet and outlet water temperature difference, avoid the phenomenon occurring the temperature difference too low, and in the case of heat exchange amount abundance, fan coil 1 chilled-water flow, without departing from the flow needed, makes the actual Inlet and outlet water temperature difference equivalent in designed temperature difference, improves energy-saving effect and the heat exchange stability of air conditioning system.
Above in conjunction with drawings and Examples, preferred implementation of the present utility model is explained in detail; but this utility model is not limited to above-mentioned embodiment; in the ken that those of ordinary skill in the art are possessed; the various changes made without departing from this utility model objective with equivalent or change etc., broadly fall into the scope of this utility model protection.
Claims (10)
1. the fan coil temperature control equipment of water valve aperture is controlled based on return air temperature and air output, including fan coil (1), dynamoelectric water valve (2), controller (3) and control panel (4), it is characterized in that: control panel (4) has several control signal outfan and feedback signal input terminal, the control signal outfan of control panel (4) connects the control signal input of controller (3), and the feedback signal input terminal of control panel (4) connects the feedback signal output of controller (3)；It is provided with blower fan in fan coil (1), return air temperature sensor (5) it is provided with at the return air inlet of fan coil (1), it is provided with air output sensor in the air-supply exit of fan coil (1), air output sensor has air volume test head and air volume signal outfan, and dynamoelectric water valve (2) is arranged in the chilled water water return pipeline of fan coil (1)；Controller (3) has several input end of analog signal, several analog signal outputs, several digital signal input ends and several digital signal output ends；Each input end of analog signal connects the signal output part of return air temperature sensor (5) respectively, the feedback signal output of dynamoelectric water valve (2) aperture, the feedback signal output of rotation speed of fan and the air volume signal outfan of air output sensor, each analog signal output connects the control signal input of dynamoelectric water valve (2) aperture respectively, rotation speed of fan control signal input, each digital quantity input connecting fan respectively opens/stops status signal output, manual/auto status signal output, failure alarm signal outfan, digital output end connecting fan respectively opens/stops control signal input, manual/auto changeover control signal input；Design temperature is inputted by control panel (4), the temperature data fed back according to return air temperature sensor (5) by controller (3) contrasts with setting air output signal with difference and the air output feedback signal of design temperature, control aperture and the rotation speed of fan of dynamoelectric water valve (2), formed and automatically adjust rotation speed of fan and the structure of dynamoelectric water valve (2) aperture according to return air temperature and air output.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterized in that: control panel (4) is provided with display screen and operation button, operation button is as manual ringing input, the input setting value of room temperature, the spacing value of dynamoelectric water valve (2) aperture and arrange air output, it is one or more that display screen is used for showing that current indoor temperature, design temperature, fan coil (1) open/stop in state and air force information.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterized in that: controller (3) is provided with multiple I/O port, wherein, analog input port AI includes return air temperature signal input part, dynamoelectric water valve (2) open degree feedback signal input part, rotation speed of fan feedback signal input terminal, analog output port AO includes dynamoelectric water valve (2) opening control signal outfan, rotation speed of fan control signal outfan, digital quantity input port DI includes blower fan start and stop state signal input terminal, manual auto state signal input part, failure alarm signal input, digital output port DO includes blower fan on off control signal output part, the most automatically changeover control signal outfan.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterised in that: the input/output between control panel (4) and controller (3) is directly connected to or is connected by RS485 communication interface.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterised in that: described control panel (4) can press key assignments room temperature, air output and dynamoelectric water valve (2) check value by input；Controller (3) is according to current return air temperature and the deviation of the setting value of room temperature, after utilizing built-in PID arithmetic to process, operation result is sent to as control signal the control input of dynamoelectric water valve (2), it is made to carry out synchronization action, control indoor temperature, and when regulating dynamoelectric water valve (2), maximum opening is not more than the check that control panel (4) end sets.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterized in that: described dynamoelectric water valve (2) is electric control valve, its power supply is directly supplied by controller (3) power supply, and valve opening is regulated by controller (3).
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterized in that: described blower fan is direct current brushless motor or frequency conversion fan, during fan coil (1) normally work, fan static pressure is 10-50Pa, and fan static pressure maximum is less than 100Pa.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterised in that: control panel (4) together constitutes, with the signal transmission of controller (3), the signal transmission of controller (3) AI and AO port, the signal transmission structure that device runs automatically.
The fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output the most according to claim 1, it is characterized in that: the check that described return air temperature is corresponding with air output, inputted in controller (3) by control panel (4) as statistical standard, water valve check with the ratio of blower fan maximum quantity of wind and the deviation value of return air temperature and design temperature by actual air output.
10. according to the fan coil temperature control equipment controlling water valve aperture based on return air temperature and air output described in claim 1 or 9, it is characterized in that: the check relation that described return air temperature is corresponding with air output, be to add up according to room load situation, air conditioning water system situation and water valve hydraulic characteristic(s) to draw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605684A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device for controlling opening degree of water valve based on return air temperature and air supply amount |
| CN109506332A (en) * | 2018-10-15 | 2019-03-22 | 平安科技（深圳）有限公司 | Wind speed control method, device and the electronic equipment of air-conditioning system |
| CN110431358A (en) * | 2016-11-22 | 2019-11-08 | 香港城市大学 | Thermostat device and humidity control system |
| CN111829146A (en) * | 2020-06-11 | 2020-10-27 | 华帝股份有限公司 | Control method of kitchen air conditioner |
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2016
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605684A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device for controlling opening degree of water valve based on return air temperature and air supply amount |
| CN110431358A (en) * | 2016-11-22 | 2019-11-08 | 香港城市大学 | Thermostat device and humidity control system |
| CN110431358B (en) * | 2016-11-22 | 2021-12-14 | 香港城市大学 | Thermostat device and temperature adjustment system |
| CN109506332A (en) * | 2018-10-15 | 2019-03-22 | 平安科技（深圳）有限公司 | Wind speed control method, device and the electronic equipment of air-conditioning system |
| CN111829146A (en) * | 2020-06-11 | 2020-10-27 | 华帝股份有限公司 | Control method of kitchen air conditioner |
| CN111829146B (en) * | 2020-06-11 | 2022-04-05 | 华帝股份有限公司 | Control method of kitchen air conditioner |
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