CN205641166U - Fan coil temperature control device based on match and receive air return temperature , delivered air quantity control with water pipe pipe diameter - Google Patents
Fan coil temperature control device based on match and receive air return temperature , delivered air quantity control with water pipe pipe diameter Download PDFInfo
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- CN205641166U CN205641166U CN201620146456.3U CN201620146456U CN205641166U CN 205641166 U CN205641166 U CN 205641166U CN 201620146456 U CN201620146456 U CN 201620146456U CN 205641166 U CN205641166 U CN 205641166U
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Abstract
The utility model relates to a fan coil temperature control device based on match and receive air return temperature, delivered air quantity control with water pipe pipe diameter, including fan coil, electric water valve, controller and control panel, be equipped with the fan in fan coil, its characterized in that: electric water valve installs the end of intaking at fan coil, and fan coil's model and water pipe pipe diameter mate the most spacing with control electric water valve aperture, and controller control electric water valve's aperture is adjusted at the spacing within range of aperture, the constitution is according to the fan coil temperature control structure of fan coil with water pipe pipe diameter matching automatically regulated electric water valve aperture, control panel has a plurality of control signal output and feedback signal input, forms the structure according to air return temperature and air supply volume automatic adjustment fan rotational speed and electric water valve aperture, fan coil's model is FC800, and perhaps the fan coil model is FC400. The utility model discloses by the biggest the most spacing beneficial effect that have accurate adjust fan coil water pipe flow, improve freezing water system's stability of controller according to fan coil's water pipe pipe diameter matching electric control valve aperture.
Description
Technical field
This utility model relate to a kind of based on water pipe match of pipe diameter and the fan coil that controlled by return air temperature, air output
Temperature control equipment.Belong to HVAC technical field.
Background technology
Fan coil is the end prod of central air-conditioning, by heat exchanger, water pipe, filter, fan, drip tray,
Air bleeding valve and support etc. form, and its operation principle is the air in constantly room, recirculation place in unit, bypasses 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, existing be mainly used in office,
Some places such as hospital, scientific research institution.Fan coil is mainly by relying on the positive action of blower fan, by surface cooler
Effect gets a desired effect.
In prior art, the ruuning situation of system is had a great impact by the end heat exchange property of central air-conditioning system.One
As fan coil, air quantity can artificially regulate, water route use electrodynamic valve carry out break-make control.When air intake parameter is fixed,
When 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 import and export the temperature difference
Designed temperature difference can be less than.In order to ensure the energy-saving effect of chilled water system, it is necessary for limiting " big flow, the little temperature difference "
Phenomenon, it is ensured that the heat transfer effect of end and rational hydraulic equilibrium performance.
The chilled-water flow of fan coil end branch is simultaneously by the water resistance of fan coil, fan coil water inlet pipe and water outlet pipe
The impact of the Water path valve resistance etc. of water resistance and fan coil.Wherein, the water resistance of fan coil water inlet pipe and water outlet pipe includes edge
Journey resistance and the water resistance of local resistance, on-way resistance is mainly affected by water pipe caliber and pipe range.Size due to valve
Being that the caliber according to water pipe is chosen, therefore the size of Water path valve water resistance is also affected by the caliber of water inlet pipe and water outlet pipe.Real
Border application in, when water pipe caliber excessive or too small time, the aperture of valve just should be relevant with the caliber of water pipe；Otherwise, need
When regulating the heat exchange amount of this section of end branch, if suddenly opening rapid closing valve, the resistance in water route and the water heat exchange of this end branch
The temperature difference also can suddenly rise and suddenly drop, and affects the control stability of whole chilled water system.
Additionally, 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, air output is worked as
Time less, coil heat exchange ability declines, and water effluent amount should reduce, and otherwise can cause the super stream of the water yield, reduce this fan coil
The heat-exchanging water temperature difference.
The fan coil pipe structure of prior art, owing to being not provided with and water pipe match of pipe diameter and by return air temperature, air output
Control the structure of water valve check, when there is the heat exchange amount of this section of end branch of regulation, need to suddenly open rapid closing valve, cause
The water heat transfer temperature difference of the resistance in water route and this end branch is neglected to rise and is neglected fall, affects the control stability of whole chilled water system
Defect.Water valve is controlled according to fan coil with its water pipe match of pipe diameter relation, return air temperature and air output it is thus desirable to provide
The fan coil temperature control equipment of check.
Utility model content
The purpose of this utility model, is resistance and this end branch that there is water route in order to solve existing fan coil pipe structure
Water heat transfer temperature difference neglect the problem that suddenly drops, affect the control stability of whole chilled water system of liter, it is provided that a kind of based on water
Pipe match of pipe diameter and the fan coil temperature control equipment controlled by return air temperature, air output, this device is electronic by controlling
The maximum opening of water valve and set the actual aperture of dynamoelectric water valve according to the deviation value of indoor temperature Yu design temperature further,
There is the feature of the accurately stability of regulation fan coil water pipe flow, raising chilled water system.
The purpose of this utility model can be reached by following technical scheme:
Based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, including
Fan coil, dynamoelectric water valve, controller and control panel, be provided with blower fan in fan coil；Its construction features is:
1) dynamoelectric water valve is arranged on fan coil water inlet end, and the model of fan coil and water pipe match of pipe diameter are electronic to control
The maximum of water valve aperture is spacing, and controller controls the aperture of dynamoelectric water valve and regulates in the range of check；Constitute according to wind
Machine coil pipe and water pipe match of pipe diameter are automatically adjusted the fan coil temperature control system of dynamoelectric water valve aperture；
2) control panel has several control signal outfan and feedback signal input terminal, the control signal of control panel
Outfan connects controller control signal input, and the feedback signal input terminal of control panel connects the feedback signal of controller
Outfan；At the return air inlet of fan coil, it is provided with return air temperature sensor, is provided with in the air-supply exit of fan coil
Air output sensor, air output sensor has air volume test head and air volume signal outfan, and dynamoelectric water valve is arranged on blower fan
In the chilled water water return pipeline of coil pipe；Controller have 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 back to air temperature respectively
The signal output part of sensor, 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 of dynamoelectric water valve aperture respectively
Input, rotation speed of fan control signal input, each digital quantity input connecting fan respectively opens/stops status signal output
End, manual/auto status signal output, failure alarm signal outfan, digital output end connecting fan respectively opens/
Stop control signal input, manual/auto changeover control signal input；Formed automatic according to return air temperature and air output
Adjust rotation speed of fan and the structure of dynamoelectric water valve aperture；
3) model of fan coil is FC800, and when middle-grade air quantity, cold is 6550W, and heat is 9260W, wind
Machine maximum quantity of wind is 1360m3/ h, being designed for backwater temperature difference is 5 degree；Or fan coil model is FC400, in
During shelves air quantity, cold is 3290W, and heat is 4530W, and blower fan maximum quantity of wind is 680m3/ h, is designed for backwater temperature difference
It it is 5 degree；When the water pipe caliber that fan coil connects is 1 inch or less, the check of dynamoelectric water valve can reach water valve
The 100% of aperture；When the water pipe caliber that fan coil connects be more than 1 inch be less than or equal to 1 inch half time, electric
The check of dynamic water valve can reach the 80% of water valve aperture；The water pipe caliber connected when fan coil is more than 1 inch
Time, the check of dynamoelectric water valve is the 60% of water valve aperture.
During actual application, control panel input design temperature, controller the temperature fed back according to return air temperature sensor
Degrees of data contrasts with setting air output signal with difference and the air output feedback signal of design temperature, controls dynamoelectric water valve
Aperture and rotation speed of fan.
The purpose of this utility model reaches also by following technical scheme:
Further, controller is provided with multiple I/O port, and wherein, analog input port AI includes that return air temperature is believed
Number input, 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 signal transmission of the analog input port AI and analog output port AO of described controller is altogether
With the signal transmission structure constituting automatic cycling operating.
Further, controller determines indoor temperature, and the temperature that will obtain according to the data that return air temperature sensor feeds back
Degree setting value and indoor temperature data separate PID arithmetic process, and obtain rotation speed of fan control signal and dynamoelectric water valve aperture
Control signal.
Further, described dynamoelectric water valve is electric control valve, and valve opening is regulated by the signal of telecommunication, its power supply by
Controller power source is directly supplied, and controls valve opening by the control signal of controller.
Further, described water valve check is before device works in writing controller, and controller is according to ambient temperature
Change persistently sends valve opening control signal, it is ensured that valve opening rate of change is relatively low, and valve maximum opening is not more than aperture
Spacing.
Further, described control panel can press key assignments room temperature, air output and dynamoelectric water valve aperture by input
Spacing value；Controller, according to current return air temperature and the deviation of the setting value of room temperature, utilizes built-in PID to transport
After calculation processes, operation result is sent to the control input of dynamoelectric water valve so that it is carry out synchronization action as control signal,
Control indoor temperature, and when regulating dynamoelectric water valve, maximum opening is not more than the check that control panel end sets.
Further, described blower fan is direct current brushless motor or frequency conversion fan, and when fan coil normally works, blower fan is quiet
Pressure is 10-50Pa, and fan static pressure maximum is less than 100Pa.
Further, the check that described return air temperature is corresponding with air output, by actual air output and blower fan strong wind
The deviation value of the ratio of amount and return air temperature and design temperature is as statistical standard, and water valve check is defeated by control panel
Enter in controller.
Further, the check relation that described return air temperature is corresponding with air output, be according to room load situation,
Air conditioning water system situation and water valve hydraulic characteristic(s) statistics 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 wind in fan coil
Machine；The maximum being controlled dynamoelectric water valve aperture according to the water pipe match of pipe diameter of fan coil by controller is spacing, electronic to control
The aperture of water valve regulates 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, carried out with the aperture regulation and rotation speed of fan regulation synchronization controlling dynamoelectric water valve；Temperature
Degree sets and is inputted and be sent to controller by control panel, and the data that controller feeds back according to return air temperature sensor determine room
Interior temperature, and desired temperature and the indoor temperature data of acquisition are compared process, obtain rotation speed of fan control signal
With dynamoelectric water valve aperture, constitute and be automatically adjusted rotation speed of fan and dynamoelectric water valve according to the deviation of indoor temperature and desired temperature
The fan coil temperature control system of aperture；Therefore, it is possible to solve existing fan coil pipe structure to there is resistance and this end in water route
The water heat transfer temperature difference of end branch road is neglected and is risen the problem suddenly dropping, affecting the control stability of whole chilled water system, has accurately tune
Save the beneficial effect of the stability of fan coil water pipe flow, raising chilled water system.
2, this utility model is spacing by dynamoelectric water valve is set maximum opening, is prevented effectively from " big flow, the little temperature difference "
Chilled water phenomenon, ensure provide need heat exchange amount while, the chilled-water flow of fan coil is relatively low, chilled water
Energy saving of system is effective.
3, this utility model is on the basis of limiting dynamoelectric water valve maximum opening, and controller enters according to the ambient temperature of change
One successive step dynamoelectric water valve aperture and rotation speed of fan, improves the heat transfer temperature difference of chilled water system, and turn avoid chilled water flow
Measuring and exceed demand, the effectively traditional dynamoelectric water valve of solution is suddenly opened and is suddenly closed the water heat transfer temperature difference caused liter suddenly fall, heat-exchange performance suddenly
Stable, 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.
Fig. 2 is the check structural representation that this utility model controls dynamoelectric water valve.
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:
Seeing figures.1.and.2, the present embodiment includes fan coil 1, dynamoelectric water valve 2, controller 3 and control panel 4,
It is provided with blower fan in fan coil 1；Dynamoelectric water valve 2 is arranged on fan coil 1 water inlet end, the model of fan coil 1 with
Water pipe match of pipe diameter is spacing with the maximum controlling dynamoelectric water valve 2 aperture, and controller 3 controls the aperture regulation of dynamoelectric water valve 2
In the range of check；Constitute the wind being automatically adjusted dynamoelectric water valve 2 aperture according to fan coil 1 and water pipe match of pipe diameter
Machine coil pipe 1 temperature control system；Control panel 4 has several control signal outfan and feedback signal input terminal, control
The control signal outfan of panel 4 processed connects the control signal input of controller 3, and the feedback signal of control panel 4 is defeated
Enter end and connect the feedback signal output of controller 3；It is provided with return air temperature sensor at the return air inlet of fan coil 1
5, 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 wind
Amount signal output part, dynamoelectric water valve 2 is arranged in the chilled water water return pipeline of fan coil 1；Controller 3 has some
Individual input end of analog signal, several analog signal outputs, several digital signal input ends and several digital signals
Outfan；Each input end of analog signal connects the signal output part of return air temperature sensor 5, dynamoelectric water valve 2 aperture respectively
The air volume signal outfan of feedback signal output, the feedback signal output of rotation speed of fan and air output sensor, respectively
Analog signal output connects the control signal input of dynamoelectric water valve 2 aperture, the input of rotation speed of fan control signal respectively
End, each digital quantity input connecting fan respectively open/stop status signal output, manual/auto status signal output,
Failure alarm signal outfan, digital output end connecting fan respectively open/stop control signal input, manual/auto turn
Change control signal input；Formed and automatically adjust rotation speed of fan and dynamoelectric water valve 2 aperture according to return air temperature and air output
Structure；
3) model of fan coil 1 is FC800, and when middle-grade air quantity, cold is 6550W, and heat is 9260W,
Blower fan maximum quantity of wind is 1360m3/ h, being designed for backwater temperature difference is 5 degree；The water pipe caliber that fan coil 1 connects is 1
Inch or following time, the check of dynamoelectric water valve 2 can reach the 100% of water valve aperture；When fan coil 1 connection
Water pipe caliber is more than 1 inch when being less than or equal to 1 inch half, and the check of dynamoelectric water valve 2 can reach water valve and opens
The 80% of degree；When the water pipe caliber that fan coil 1 connects is more than 1 inch, the check of dynamoelectric water valve 2 is
The 60% of water valve aperture.
During actual application, control panel 4 input design temperature, anti-according to return air temperature sensor 5 by controller 3
The temperature data of feedback contrasts with setting air output signal with the difference of design temperature and air output feedback signal, controls electricity
The aperture of dynamic water valve 2 and rotation speed of fan.
In the present embodiment, dynamoelectric water valve 2 is electric control valve, and valve opening can be regulated by the signal of telecommunication, its power supply by
Controller 3 power supply is directly supplied, and can control valve opening by the control signal of controller 3.Described controller 3
Analog input port AI and the signal transmission of analog output port AO together constitute the letter of automatic cycling operating
Number transmission structure.
Fan coil 1 uses the fan coil of routine techniques, dynamoelectric water valve 2 to use motorized adjustment water valve in routine techniques,
Controller 3 uses field controller or the singlechip controller of routine techniques, and control panel 4 uses routine techniques band some
The display screen of individual function signal input button is constituted.
The monitoring of all parts be can be displayed on control panel 4 by controller 3, and described control panel 4 can be by input
By key assignments room temperature, air output and dynamoelectric water valve 2 check value；Controller 3 according to current return air temperature and
The deviation of the setting value of room temperature, after utilizing built-in PID arithmetic to process, sends out operation result as control signal
Give the control input of dynamoelectric water valve 2 so that it is carry out synchronization action, control indoor temperature, and at regulation dynamoelectric water valve
When 2, maximum opening is not more than the check that control panel 4 end sets.
Described blower fan is direct current brushless motor or frequency conversion fan, and when fan coil 1 normally works, fan static pressure is
10-50Pa, fan static pressure maximum is less than 100Pa.
The check that described return air temperature is corresponding with air output, by actual air output and blower fan maximum quantity of wind ratio and
Return air temperature inputs controller as statistical standard, water valve check by control panel 4 with the deviation value of design temperature
In 3.The check relation that described return air temperature is corresponding with air output, is according to room load situation, air conditioning water
System situation and water valve hydraulic characteristic(s) statistics draw.
Controller 3 carries multiple signal transmission port, and wherein analog signals transmission port includes analog input port AI
And analog output port AO two kinds, return air temperature sensor 5 signal output part, blower motor tach signal outfan
Controller 3AI signal input port is connected with dynamoelectric water valve 2 opening amount signal outfan；Blower motor Frequency Converter Control is believed
Number input and dynamoelectric water valve 2 aperture control input and connect controller 3AO signal output port；
Digital quantity signal transmission port includes DI and DO two kinds, blower fan on off controller 3 signal output part, manually from
Dynamic switch 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
(note: for simplifying utility model structure, the prior art such as alarm, manual automatic switchover device not shown in accompanying drawing)；Control
Device processed 3 can the start and stop state of supervising device, manual automatic control state and the fortune of automatic alarm for fault by DI port
Row state, can export control signal by DO port, start or stop blower fan, be manually or automatically controlled cutting
Change.
The signal transmission of the analog input port AI and analog output port AO of controller 3 together constitutes device
The signal transmission structure of automatic cycling operating.The signal transmission structure of device automatic cycling operating, for device in Automatic Cycle
Run and adapt to environmental change and provide lasting variable signal source, make device can automatically adjust self fortune according to variable signal
Make state.Controller 3 is when calculating rotation speed of fan and dynamoelectric water valve 2 aperture, according to return air temperature sensor 5 feedback
Data determine indoor temperature, and utilize the deviation value of indoor environment temperature and design temperature to be obtained by PID arithmetic.Work
Return air temperature sensor 5 test constantly indoor environment temperature to controller 3 feedback data when making, works as indoor environment temperature
When changing, controller 3 re-starts the calculating of indoor temperature and design temperature deviation value, and utilizes new deviation value
Carry out PID arithmetic process, obtain new rotation speed of fan control signal and dynamoelectric water valve 2 opening control signal, again adjust
Whole rotation speed of fan and the aperture of dynamoelectric water valve 2, reach to operate according to indoor temperature change generated in case automatic regulating apparatus to improve freezing
The effect of water system stability.
The check of dynamoelectric water valve 2 is before device works in writing controller 3, and controller 3 becomes according to ambient temperature
Changing and persistently send valve opening control signal, owing to variation of ambient temperature speed is relatively slow, the valve opening changed therewith is also delayed
Slow adjustment, it is ensured that valve opening rate of change is relatively low, is prevented effectively from valve and suddenly opens the situation generation of rapid pass, it is ensured that water pipe end
Branch road heat transfer temperature difference will not suddenly rise and suddenly drop, improve chilled water system heat exchange stability, meanwhile, valve regulate aperture time,
Valve maximum opening is not more than check.
Blower fan in fan coil 1 is direct current brushless motor or frequency conversion fan, in order to controller 3 is to rotation speed of fan
Adjusting, when fan coil 1 normally works, fan static pressure is 10-50Pa, and fan static pressure maximum is less than 100Pa.
Dynamoelectric water valve 2 is electric control valve, can be changed the aperture of valve, and then the stream of control valve by the signal of telecommunication
Logical ability, controls to enter the water yield of heat exchange coil.In actual application, flow can be set at the water outlet of dynamoelectric water valve
Detection head, detects the flow of dynamoelectric water valve by flow detection head and delivers to the flow feedback input of controller 3, by controlling
Device processed judges the aperture of dynamoelectric water valve 2 according to flow.
It is under FC800 that this utility model is applied in fan coil 1 model, and under GB operating mode, during middle-grade air quantity, cold is
6550W, heat is 9260W.Rotation speed of fan is adjustable, and blower fan maximum quantity of wind is 1360m3/h.It is designed for backwater temperature difference
It it is 5 degree.This fan coil 1 water valve check relation table is as follows:
X1 value table
| Water pipe caliber (mm) | Water valve check (%) |
| ≤DN25 | 100 |
| DN25-DN40 | 80 |
| ＞ DN40 | 60 |
Fan coil described in table and the Data Matching of water pipe caliber, refer to set in the present embodiment: when fan coil 1
When the water pipe caliber connected is 1 inch or less, the check of dynamoelectric water valve 2 can reach the 100% of water valve aperture；
When fan coil 1 connect water pipe caliber be more than 1 inch be less than or equal to 1 inch half time, opening of dynamoelectric water valve 2
Spend and spacing can reach the 80% of water valve aperture；When the water pipe caliber that fan coil 1 connects is more than 1 inch, electronic
The check of water valve 2 is the 60% of water valve aperture；Now using model is the fan coil of FC800, sets GB
Under operating mode during middle-grade air quantity cold be 6550W, heat be 9260W, blower fan maximum quantity of wind be 1360m3/ h, it is designed for
In the case of backwater temperature difference is 5 degree, the caliber size of the connecting fan coil pipe that should select.
The relation table controlling dynamoelectric water valve 2 aperture according to return air temperature and actual air output of table 2.
X2 value table: water valve check (%) value table
Now, indoor return air temperature is 29 degree, and actual air volume is the 50% of maximum quantity of wind, then X2=60%.
Total water valve check X=X1*X2=60%.
Two water-through valves aperture under current air output is not more than this two water-through valves check.According to current return air temperature
The deviation of the setting value of degree and room temperature, after utilizing PID arithmetic to process, sends operation result as control signal
Mechanism to two water-through valves so that it is carry out synchronization action, controls indoor temperature.
Test shows: determines water pipe pipe diameter size, i.e. determines water valve check, in air-conditioning cold load range, surveys
Fixed each design temperature impact on fan coil 1 heat exchange property, under each desired temperature, indoor temperature is not up to
During design temperature, controller 3, according to current return air temperature and the deviation of room temperature set point, utilizes PID arithmetic
After process, operation result is converted to control signal and is sent to the converter of dynamoelectric water valve and blower fan, control water valve simultaneously and open
Degree and rotation speed of fan, adjust indoor temperature, and during dynamoelectric water valve 2 aperture regulates, maximum opening is not more than aperture limit
, there is not " big flow, the little temperature difference " phenomenon in position, water yield cold all reaches design conditions.
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, and supply water temperature is certain, and during output change, refrigerating capacity changes with the change of output,
Adding 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
About 92% originally, 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, according to statistics, supplies water
When temperature raises 1 DEG C, refrigerating capacity reduces about 10%, and supply water temperature is the highest, and amount of decrease is the biggest, and dehumidifying effect declines.
Water supply conditions is certain, and when fan coil air quantity changes, refrigerating capacity and air-treatment enthalpy difference, along with change, are 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, and therefore, the refrigerating capacity of fan coil reduces with the increase of supply backwater temperature difference, according to statistics
When supply water temperature is 7 DEG C, confession, backwater temperature difference are in time bringing up to 7 DEG C for 5 DEG C, and 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.In these physical parameters
Mainly include the relative humidity of air dry-bulb temperature, air, speed air flow, mean radiant temperature, the metabolism of human body
Amount and clothing etc. six.Wherein, temperature and the flowing velocity of air is to evaluate the comfortable bar of thermal environment that fan coil is provided
The important parameter of part.
Specific embodiment 2:
The feature of the present embodiment is, fan coil 1 model is FC400, and when middle-grade air quantity, cold is 3290W, heat
Amount is 4530W, and blower fan maximum quantity of wind is 680m3/ h, being designed for backwater temperature difference is 5 degree；Indoor temperature setting value is
25 degree.The water pipe caliber of connecting fan coil pipe is DN30.
X1 value table
| Water pipe caliber (mm) | Water valve check (%) |
| ≤DN20 | 100 |
| DN20-DN40 | 80 |
| ＞ DN40 | 60 |
Fan coil described in table and the Data Matching of water pipe caliber, refer to set in the present embodiment: when fan coil 1
When the water pipe caliber connected is 1 inch or less, the check of dynamoelectric water valve 2 can reach the 100% of water valve aperture；
When fan coil 1 connect water pipe caliber be more than 1 inch be less than or equal to 1 inch half time, opening of dynamoelectric water valve 2
Spend and spacing can reach the 80% of water valve aperture；When the water pipe caliber that fan coil 1 connects is more than 1 inch, electronic
The check of water valve 2 is the 60% of water valve aperture；Now using model is the fan coil of FC800, sets GB
Under operating mode during middle-grade air quantity cold be 6550W, heat be 9260W, blower fan maximum quantity of wind is 1360m3/h, is designed for
In the case of backwater temperature difference is 5 degree, the caliber size of the connecting fan coil pipe that should select.
The relation table controlling dynamoelectric water valve 2 aperture according to return air temperature and actual air output of table 2.
According to above-mentioned control planning table, owing to the water pipe caliber of connecting fan coil pipe is DN30, set X1=80%.
X2 value table
Now, indoor return air temperature is 31 degree, and actual air volume is the 85% of maximum quantity of wind, then X2=80%.
Total water valve check X=X1*X2=64%.
Then, two water-through valves aperture under current return air temperature and air output is not more than this two water-through valves check.
According to current return air temperature and the deviation of the setting value of room temperature, after utilizing PID arithmetic to process, by operation result
It is sent to the mechanism of two water-through valves as control signal so that it is carry out synchronization action, controls indoor temperature.
When the water pipe caliber that fan coil 1 connects is 20mm or following, the check of dynamoelectric water valve 2 can reach
The 100% of water valve aperture；When fan coil 1 connect water pipe caliber be more than 20mm be less than or equal to 40mm time,
The check of dynamoelectric water valve 2 can reach the 80% of water valve aperture；The water pipe caliber connected when fan coil 1 is 40mm
Or time above, the check of dynamoelectric water valve 2 is the 60% of water valve aperture.
Determine water pipe pipe diameter size, i.e. determine water valve check, in air-conditioning cold load range, measure each and set
The temperature impact on fan coil 1 heat exchange property, under each desired temperature, when indoor temperature is not up to design temperature,
Controller 3 is according to current return air temperature and the deviation of room temperature set point, after utilizing PID arithmetic to process, and will fortune
Calculation result is converted to control signal and is sent to water valve and fan frequency converter, controls water valve aperture and rotation speed of fan simultaneously, adjusts
Indoor temperature, during the regulation of dynamoelectric water valve 2 aperture, maximum opening is not more than check, also do not occur " big flow,
The little temperature difference " phenomenon, water yield cold all reaches design conditions.
In use, automatically adjusting of dynamoelectric water valve 2 is limited this utility model by controller 3 all the time less than aperture
Position, effectively controls the fan coil 1 Inlet and outlet water temperature difference, it is to avoid the phenomenon that the temperature difference is too low occurs, and in heat exchange amount abundance
In the case of, 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,
Improve 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 practicality
Novel it is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, with equivalent
Or the various changes that change etc. is made without departing from this utility model objective, broadly fall into the scope of this utility model protection.
Claims (7)
1. based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, including fan coil (1), dynamoelectric water valve (2), controller (3) and control panel (4), in fan coil (1), be provided with blower fan；It is characterized in that:
1) dynamoelectric water valve (2) is arranged on fan coil (1) water inlet end, the model of fan coil (1) and water pipe match of pipe diameter are spacing with the maximum controlling dynamoelectric water valve (2) aperture, and controller (3) controls the aperture of dynamoelectric water valve (2) and regulates in the range of check；Constitute fan coil (1) temperature control system being automatically adjusted dynamoelectric water valve (2) aperture according to fan coil (1) and water pipe match of pipe diameter；
2) 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)；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；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；
3) model of fan coil (1) is FC800, and when middle-grade air quantity, cold is 6550W, and heat is 9260W, and blower fan maximum quantity of wind is 1360m3/ h, being designed for backwater temperature difference is 5 degree；Or fan coil (1) model is FC400, when middle-grade air quantity, cold is 3290W, and heat is 4530W, and blower fan maximum quantity of wind is 680m3/ h, being designed for backwater temperature difference is 5 degree；When the water pipe caliber that fan coil (1) connects is 1 inch or less, the check of dynamoelectric water valve (2) can reach the 100% of water valve aperture；When the water pipe caliber that fan coil (1) connects be more than 1 inch be less than or equal to 1 inch half time, the check of dynamoelectric water valve (2) can reach the 80% of water valve aperture；When the water pipe caliber that fan coil (1) connects is for during more than 1 inch, and the check of dynamoelectric water valve (2) is the 60% of water valve aperture.
The most according to claim 1 based on water pipe match of pipe diameter and by return air temperature, the fan coil temperature control equipment that air output controls, 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 most according to claim 2 based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, it is characterised in that: the signal transmission of the analog input port AI and analog output port AO of described controller (3) together constitutes the signal transmission structure of automatic cycling operating.
The most according to claim 1 based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, it is characterized in that: described dynamoelectric water valve (2) is electric control valve, valve opening is regulated by the signal of telecommunication, its power supply is directly supplied by controller (3) power supply, and controls valve opening by the control signal of controller (3).
The most according to claim 1 based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, 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 most according to claim 1 based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, 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.
7. according to described in claim 1 or 6 based on water pipe match of pipe diameter and the fan coil temperature control equipment that controlled by return air temperature, air output, 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.
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| CN201620146456.3U CN205641166U (en) | 2016-02-28 | 2016-02-28 | Fan coil temperature control device based on match and receive air return temperature , delivered air quantity control with water pipe pipe diameter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588208A (en) * | 2016-02-28 | 2016-05-18 | 广州市设计院 | Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume |
| TWI626407B (en) * | 2017-03-29 | 2018-06-11 | 動態技術有限公司 | Air conditioning system and air conditioning control method |
| CN112771315A (en) * | 2018-09-28 | 2021-05-07 | 三菱电机株式会社 | Air conditioner |
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2016
- 2016-02-28 CN CN201620146456.3U patent/CN205641166U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588208A (en) * | 2016-02-28 | 2016-05-18 | 广州市设计院 | Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume |
| TWI626407B (en) * | 2017-03-29 | 2018-06-11 | 動態技術有限公司 | Air conditioning system and air conditioning control method |
| CN112771315A (en) * | 2018-09-28 | 2021-05-07 | 三菱电机株式会社 | Air conditioner |
| CN112771315B (en) * | 2018-09-28 | 2022-04-29 | 三菱电机株式会社 | Air conditioner |
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