CN202328636U - End control system of fan coil system - Google Patents
End control system of fan coil system Download PDFInfo
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- CN202328636U CN202328636U CN201120462361XU CN201120462361U CN202328636U CN 202328636 U CN202328636 U CN 202328636U CN 201120462361X U CN201120462361X U CN 201120462361XU CN 201120462361 U CN201120462361 U CN 201120462361U CN 202328636 U CN202328636 U CN 202328636U
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Abstract
The utility model relates to an end control system of a fan coil system. The end control system comprises a break-make ratio determining device, a temperature sensor and a water valve control device, wherein the break-make ratio determining device is connected with a cyclic start control device, a temperature setting device, the water valve control device and the temperature sensor respectively through circuits; and the water valve control device is connected with a thermal expansion valve. The end control system has the beneficial effects that the technical prejudice that the thermal expansion valve cannot be used as an end water flow control valve in the fan coil system is overcome; since the thermal expansion valve with long service life is used in the fan coil system according to the technical scheme, the service life of the end water flow control valve of the system is prolonged, and the stability of the system is enhanced; and because the concept of break-make ratio control is introduced into the system, the indoor temperature fluctuation is reduced by using a complex algorithm, and the indoor comfort is improved.
Description
Technical field
The utility model relates to the utility model and relates to central air conditioner system, relates in particular to a kind of end control system of fan coil system.
Background technology
At present, central air conditioner system has obtained application more and more widely in various building constructions such as dwelling house, commercial office building, hotel.The end equipment of air-conditioning system directly affects the control effect to indoor environment, has also directly reflected the cold and hot amount of system.Form according to air-conditioning system is different; The end of air-conditioning system also has various ways; Situation with regard to the present air-conditioning system of China; Primary air fan-coil system is to use the widest air-conditioning system in domestic all kinds of offices at present and the hotel architecture, in the central air conditioner system of China is used in occupation of main status.The Energy Saving Control of research fan coil system has great significance.
Fan coil cooling unit belongs to half central air-conditioning system, also is a kind of principal mode of air-water air-conditioning system.Fan coil units mainly is made up of blower fan, coil pipe, air cleaner, adjusting device and casing.Fan coil is directly installed in the air-conditioned room, and flow through cold water or hot water and the coil pipe air generation heat exchange outward of flowing through in the coil pipe reach the purpose of air conditioning.Easy for installation, the flexible arrangement of fan coil, but independent regulation room temperature and other rooms are not exerted an influence basically, the adjusting needs when being prone to adapt to the fluctuation of building internal loading are convenient to building and are increased the expansion air-conditioning system; The fan coil type is little, and it is few to take space, practices thrift the building floor height, and owing to there is not airduct, fire and smoke exhaust and noise transfer problem all solve than being easier to; As far as water system, because the drag losses of fan coil is bigger, thereby water system is difficult for imbalance in addition.
The control of fan coil is exactly in order to regulate the cooling amount of coil pipe.Can know that from the principle of fan coil the cold adjusting can adopt air quantity adjusting, the water yield to regulate and water temperature is regulated, wherein water temperature is regulated the concentrated regulating measure of genus, mainly according to load condition whole system is regulated; It mainly is manual third gear fan speed regulation that air quantity is regulated, temperature control blower fan three-step timing; Water yield control mainly is the control of temperature control electromagnetic break-make.At present, control mainly is through accomplishing with the temperature controller of the corresponding setting of each fan coil for the end of fan coil, and automaticity is higher mainly contains temperature control force 3 wind machine speed governing type and the speed governing of force 3 wind machine and add electronic flow control valve and control temperature controller.Temperature control force 3 wind machine mode of speed regulation will be through being arranged on the real time temperature that temperature sensor in the room records the room, according to the temperature value of setting, and the manner of execution that judgement should be taked, the too high corresponding reduction gear of temperature, temperature is crossed the low gear of then heightening.Because the simplicity of this regulative mode self; Have some defectives: because the thermal inertia of air-conditioned room is very big; Water coil in the fan coil also has bigger thermal inertia; Therefore so simple control just causes bigger fluctuations in indoor temperature, especially under the situation of underload, very easily produces imbalance.The reason that this phenomenon occurs relies on indoor temperature to judge that the method for regulating direction does not have " foresight " merely with regard to being; Only controlled the direction of regulating, but accurately do not held, because the hysteresis quality that air-conditioning system is regulated for " amount " of regulating; The corresponding action of regulating, sensor just takes place after detecting the tolerance interval that temperature exceeds design temperature; But this moment, indoor temperature can not return in the tolerance interval after action takes place immediately, if during this period, temperature controller does not in time change regulates rule; Still according to former regular further adjusting; Then be easy to make controlled plant generation overshoot, the phenomenon of indoor temperature recurrent fluctuations so just occurs, influence indoor comfort level.
And; At present; The main temperature control electromagnetic break-make that adopts of the water yield control of fan coil system is controlled; Yet the service life of magnetic valve is shorter, and service life long heating power expansion valve because its break-make sluggish, overshoot and cause the fluctuation of room temperature and generally believed and can't in fan coil system, use easily.
The utility model content
The purpose of the utility model provides a kind of end control system of fan coil system, to overcome the deficiency that present prior art exists.
The purpose of the utility model is to realize through following technical scheme:
A kind of end control system of fan coil system; Comprise that make-to-break ratio confirms device, temperature sensor and water valve control device; Said make-to-break ratio confirms that device passes through circuit and is connected with cycle initiation control device, temperature setting device, water valve control device and temperature sensor respectively, and the water valve control device is connected with heating power expansion valve.Said make-to-break ratio confirms that device is used for confirming according to the difference of indoor preferred temperature and indoor Current Temperatures the make-to-break ratio and the output of said next control cycle of heating power expansion valve.Said water valve control module is connected with heating power expansion valve, is used to receive said make-to-break ratio, and said heating power expansion valve is controlled in said next control cycle with said make-to-break ratio.Said temperature setting device is used to receive the indoor preferred temperature of user's setting and export to said make-to-break ratio and confirm device.Said temperature sensor is used to obtain indoor Current Temperatures and exports to said make-to-break ratio and confirm device.Said cycle initiation control device is used for triggering make-to-break ratio according to the external command that receives and confirms device.Said heating power expansion valve is used to control the coil pipe current.
The beneficial effect of the utility model is: overcome and can't use heating power expansion valve as this technological prejudice of terminal water flow control valve in the fan coil system; Because the technical scheme that the utility model provides has been used long heating power expansion valve in service life in fan coil system; Thereby increased the service life of the terminal water flow control valve of system, strengthened the stability of system; Owing in the utility model, introduced the notion of make-to-break ratio control, utilize complicated algorithm to reduce fluctuations in indoor temperature, improved indoor comfort level.
Description of drawings
According to accompanying drawing the utility model is done further explain below.
Fig. 1 is the structured flowchart of the end control system of the described fan coil system of the utility model embodiment.
Among the figure:
1, make-to-break ratio is confirmed device; 2, temperature sensor; 3, water valve control device; 4, cycle initiation control device; 5, temperature setting device; 6, heating power expansion valve.
The specific embodiment
As shown in Figure 1; The end control system of the described a kind of fan coil system of the utility model embodiment; Comprise that make-to-break ratio confirms device 1, temperature sensor 2 and water valve control device 3; Said make-to-break ratio confirms that device 1 is connected with cycle initiation control device 4, temperature setting device 5, water valve control device 3 and temperature sensor 2 respectively through circuit, and water valve control device 3 is connected with heating power expansion valve 6.Said make-to-break ratio confirms that device 1 is used for confirming according to the difference of indoor preferred temperature and indoor Current Temperatures the make-to-break ratio and the output of said next control cycle of heating power expansion valve.Said water valve control module 3 is connected with heating power expansion valve, is used to receive said make-to-break ratio, and said heating power expansion valve is controlled in said next control cycle with said make-to-break ratio.Said temperature setting device 5 is used to receive the indoor preferred temperature of user's setting and export to said make-to-break ratio and confirm device.Said temperature sensor 2 is used to obtain indoor Current Temperatures and exports to said make-to-break ratio and confirm device.Said cycle initiation control device 4 is used for triggering make-to-break ratio according to the external command that receives and confirms device.The external command that cycle initiation control device 4 receives can be to be used to control the setting device of the initial moment of control in each initial moment of end period in the system send; This controls initial moment setting device; Can be used for the initial moment of each terminal control cycle of fan coil system is provided with; Be engraved on the time shaft when making each corresponding control cycle of terminal institute initial and evenly distribute, promptly each terminal calculate make-to-break ratio the time be engraved in evenly distribution on the time shaft.Said heating power expansion valve 6 is used to control the coil pipe current.
The utility model is through heating power expansion valve 6 control system current; And the control method of this heating power expansion valve 6 may further comprise the steps: obtain the difference of indoor preferred temperature and indoor Current Temperatures, and confirm the make-to-break ratio of heating power expansion valve 6 in next control cycle according to said difference; Said heating power expansion valve 6 is controlled in said next control cycle with said make-to-break ratio.Above-mentioned make-to-break ratio is meant the time of opening and the ratio of cycle duration.Through such control method, make that adopting heating power expansion valve 6 to carry out terminal current control becomes possibility, overcome existing technological prejudice, increased the service life of terminal water flow control valve 6; And; Owing in the utility model, introduced the notion of make-to-break ratio control, not only control to adjust direction, and the cold of control and regulation; Make above-mentioned control that foresight arranged to heating power expansion valve; Overcome in the prior art the significantly overshoot that the hysteresis quality owing to air-conditioning system causes, reduced the amplitude of room temperature fluctuation, improved indoor comfort level.
The control method of the fan coil system that the utility model embodiment provides may further comprise the steps:
1) obtains indoor preferred temperature and indoor Current Temperatures through temperature setting device 5 and temperature sensor 2;
In the fan coil system that present embodiment relates to; Exist and each fan coil terminal corresponding temperature setting device 5 and temperature sensor 2; Said temperature sensor 2 is installed in the terminal room of being regulated of fan coil, is used for the indoor Current Temperatures of real-time perception; Said temperature setting device 5 can be installed in the terminal room of being regulated of fan coil, also may reside in the place of the room temperature in the terminal room of being regulated of any convenient control fan coil, is used to receive the indoor preferred temperature that the user is provided with.
2) calculate the difference of above-mentioned indoor preferred temperature and indoor Current Temperatures;
3) confirm the make-to-break ratio of heating power expansion valve 6 in next control cycle according to this difference;
Adopt PID (PID; Proportion Integration Differentiation) any one in algorithm, fuzzy algorithmic approach, self-adaptive PID algorithm or the adaptive fuzzy algorithm carries out computing according to the difference of indoor preferred temperature and indoor Current Temperatures, confirms the make-to-break ratio of heating power expansion valve in next control cycle.
4) heating power expansion valve 6 is controlled in next control cycle with this make-to-break ratio.
In the present embodiment; The control cycle of heating power expansion valve 6 should be set in advance; When the control cycle that heating power expansion valve 6 is set in advance is 30 minutes; The then per computing that can do once its make-to-break ratio in 30 minutes, and in next 30 minutes cycle, adopt this make-to-break ratio that draws that heating power expansion valve 6 is controlled.
When the make-to-break ratio that calculates is 50%, then as long as in 30 minutes of this cycle, the opening of heating power expansion valve 6 accumulative total is 15 minutes, and closed condition accumulative total is to get final product in 15 minutes.But, in order to reach better control effect, then according to the make-to-break ratio that calculates; When next control cycle begins; The state of controlling said heating power expansion valve 6 is for opening, and reach that said make-to-break ratio confirms open duration after (when make-to-break ratio is 50%, the cycle is under 30 minutes the situation; Promptly after reaching 15 minutes), the state of controlling said heating power expansion valve 6 is for closing.Keeping that this moment is continuous opened or closing state, can reduce the state variation of heating power expansion valve 6, increases the life-span of heating power expansion valve 6.
The utility model can utilize long heating power expansion valve 6 in service life, has overcome at present for the technological prejudice that can't use heating power expansion valve as terminal water flow control valve in the fan coil system.And; Because the technical scheme that the utility model provides has been used long heating power expansion valve 6 in service life in fan coil system; Thereby increased the service life of the terminal water flow control valve of system; Avoided because valve damages, be in for a long time close or opening and cause indoor can't cooling or cooling amount situation about can't mediate through valve, thereby strengthened the stability of system.And, owing in the utility model, introduced the notion of make-to-break ratio control, utilize complicated algorithm to reduce fluctuations in indoor temperature, improved indoor comfort level.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is made any pro forma restriction; Though the utility model discloses as above with preferred embodiment, yet be not that any professional and technical personnel of being familiar with is not in breaking away from the utility model technical scheme scope in order to qualification the utility model; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be content, and the technical spirit of the utility model all still belong within the protection domain of the utility model any simple modification, equivalent variations and modification that above embodiment has done for disengaging the utility model technical scheme.
Claims (1)
1. the end of a fan coil system is controlled system; Comprise that make-to-break ratio confirms device (1), temperature sensor (2) and water valve control device (3); It is characterized in that: said make-to-break ratio confirms that device (1) is connected with cycle initiation control device (4), temperature setting device (5), water valve control device (3) and temperature sensor (2) respectively through circuit, and water valve control device (3) is connected with heating power expansion valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120462361XU CN202328636U (en) | 2011-11-18 | 2011-11-18 | End control system of fan coil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120462361XU CN202328636U (en) | 2011-11-18 | 2011-11-18 | End control system of fan coil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202328636U true CN202328636U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120462361XU Expired - Fee Related CN202328636U (en) | 2011-11-18 | 2011-11-18 | End control system of fan coil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202328636U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236001A (en) * | 2013-06-17 | 2014-12-24 | 珠海格力电器股份有限公司 | Air-conditioning control system and air-conditioning control method |
| CN112146252A (en) * | 2020-09-18 | 2020-12-29 | 新奥数能科技有限公司 | Central air conditioner cooling regulation method, device and system based on-off valve |
-
2011
- 2011-11-18 CN CN201120462361XU patent/CN202328636U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236001A (en) * | 2013-06-17 | 2014-12-24 | 珠海格力电器股份有限公司 | Air-conditioning control system and air-conditioning control method |
| CN112146252A (en) * | 2020-09-18 | 2020-12-29 | 新奥数能科技有限公司 | Central air conditioner cooling regulation method, device and system based on-off valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20131118 |