CN1448703A - Draught fan coil pipe air-conditioning system cold / heat quantity metering arrangement - Google Patents
Draught fan coil pipe air-conditioning system cold / heat quantity metering arrangement Download PDFInfo
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- CN1448703A CN1448703A CN 03116150 CN03116150A CN1448703A CN 1448703 A CN1448703 A CN 1448703A CN 03116150 CN03116150 CN 03116150 CN 03116150 A CN03116150 A CN 03116150A CN 1448703 A CN1448703 A CN 1448703A
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Abstract
The cold/heat amount measurer for blower-coil pipe air conditioner is one intelligent measurer based on the blower-coil pipe heat transferring theory as calculation base and calculating according to the wind inlet air temperature, wind inlet air humidity, cold water inlet temperature, cold water flow rate, blower wind pressure and other parameters. The cold/heat amount measurer includes temperature sensor, humidity sensor, blower voltage probe, temperature and humidity converting amplifier, voltage shaper, multiplex A/D converter, CPU, data memory chip, RS-485 communication data converting chip, LCD, etc. During engineering construction, the measurer is installed near the wind inlet of blower coil pipe, the temperature sensor and the humidity sensor are fixed in the center of the blower coil pipe, the voltage probe is connected to the shift switch of the blower and connected to cold/heat source managing computer via the RS-485 communication data converting chip.
Description
Technical field
The present invention relates to be a kind of air-conditioning system cold/thermal gauge, particularly a kind of cold/thermal gauge that is suitable for fan coil cooling unit.Belong to Building Environment and Equipment Engineering and Refrigeration Engineering technical field.
Background technology
Along with China's air-conditioning cold/appearance successively of heat household metering fees policy, the air-conditioning expense of calculating by area methodology or installation load method more and more can not satisfy air-conditioning residential building estate management person and user's demand.Like this, the market potential of bringing has thus been seen by more domestic enterprises, begins one's study in succession and produces relevant energy meter product.At present, the air-conditioning that occurs on the market cold/the heat metering instrument mainly contains two kinds of the two warm discharge methods of chronometry and water side.
Chronometry is cold/and heat measuring meter is the fan coil place that is directly installed on the central air conditioner system end, running status to motorized valve state and blower fan detects in real time, and with the unlatching of motorized valve as the basic foundation of using central air conditioner, the user is used the time of air-conditioning to add up and preserves, use the central air conditioner equivalent time to charge according to each user then.As Foshan, Guangzhou Ai Ke AKE-C02 time type central air conditioner individual user fee counter.This metering method can accurately be calculated the time of each applying unit air-conditioning system cooling, and is more rational from service time, but has following problem:
1. do not consider the variation of cold/hot water flow, under the very unsettled situation of cold/hot water system, will bring bigger error to cold/heat metering;
2. do not consider the cold/hot water variation of temperature.Like this, the fan coil units cold/hot water changes big situation for, backwater temperature difference under, can't really react user's reality with cold or use heat;
3. do not consider the influence of user's room air state parameter to fan coil units cooling/heat, thereby make cold/heat metering result and user's actual usefulness cold/heat differs greatly.
The two warm discharge methods of water side are cold/heat measuring meter be according to monitoring by the cold/hot water flow of air conditioner end equipment and the variation of water temperature, the usefulness that calculates the user of unit in one period is cold/heat.Each metering units of this system has two sleeving temperature sensors, a cover flow sensor.Detect the cold/hot water flow and the import and export temperature of the automatic continuous detecting air conditioner end equipment of indicator, calculate cold/heat then.
This metering system is very perfect in theory, and cold/hot water flow and variation of temperature have all been considered, and is cold/heat metering data accuracy height.In the prior art.Application number is (01247151), and name is called the patent of invention at (totally digitilized family with cold/heat measuring meter); Application number is (00241599), and name is called the patent of invention of (a kind of monolithic devices heat meter calorimeter); Application number is (98241444), and name is called the patent of invention of (changes in temperature amount metering device), all adopts this metering method.But owing to following deficiency has restricted this metering method applying in China.
1. the pipe network form there is specific (special) requirements.Adopt this kind metering method to require each user to have only a cold/hot water inlet, must form an individual branches with indoor several coil pipes, the dirigibility that this certainly will reduce system layout is unfavorable for the overall co-ordination with construction pattern.
2. install complicated, difficult in maintenance.Because this measuring apparatus need be destroyed the water system of air-conditioning system, construction is got up cumbersome.And when device is out of order when it is keeped in repair, dismantlement work is difficulty in the extreme.
Summary of the invention
In order to overcome the shortcomings and deficiencies of prior art, adapt to China's intelligent building air-conditioning cold/development of hot metering cause, the present invention designs a kind of parameters such as wind side-entrance air themperature, wind side-entrance air humidity, cooling water inlet temperature, cold water flow and blower voltage by the monitoring fan coil, and with the heat transfer theory of air-conditioning coil pipe serve as calculate the intelligent fan coil cooling unit on basis cold/thermal gauge.
The present invention mainly comprises temperature sensor, humidity sensor, blower voltage probe, temperature, humidity converter amplifier circuit, voltage shaping circuit, multi-channel A/D change-over circuit, the cpu data process chip, pin-saving chip, RS-485 communication data conversion chip and liquid crystal display circuit etc.Highly sensitive temperature sensor and highly sensitive humidity sensor are respectively to the air intake air themperature t of fan coil
aWith air intake air humidity d
aMonitor, voltage probe is to the blower voltage U of fan coil
fAir quantity G when monitoring and utilizing (1) formula to obtain the fan coil operation
a, simultaneously by with the supply water temperature t of the communication of cold/heat source central management machine monitoring cold/heat source
ZwWith water supply total flow G
ZwAnd utilize (2) formula and (3) formula to obtain the inflow temperature t of fan coil respectively
wWith flow of inlet water G
wLike this, the cooling/thermal load of fan coil can be calculated by (4) formula, and to obtaining the cooling/heat of fan coil in following period of time after the time accumulative total, thereby realize the cold/heat metering of fan coil.
t
w＝t
zw+c (2)
In the following formula, a, b, c, K
x, K
z, K
s, m
1, m
2, m
3, m
4, n
1, n
2, n
3, n
4Be undetermined coefficient, determine by engineering debug; N is user's fan coil sum of whole air-conditioning system.
Fan coil cooling unit of the present invention is cold/parameter that thermal gauge is monitored is divided into two types: the real-time monitoring parameter of a kind of user's of being fan coil, comprise fan coil EAT, humidity and blower voltage, they by this device directly monitoring obtain; Another kind is the controlled variable of cold/heat source cold/hot water system, comprises supply water temperature and total water supply flow, and they pass to this device by network communication from the central management machine of cold/heat source.
When engineering construction, only this measuring apparatus need be installed near the fan coil air inlet, its temperature sensor and humidity sensor are fixed on fan coil air inlet central authorities, its voltage probe links to each other with the driving switch of blower fan, utilizes RS-485 communication data conversion chip that it is connected with the supervisor of cold/heat source simultaneously.
This cold/thermal gauge need not destroy air-conditioner water system, and convenient for installation and maintenance, variable is with a high credibility, and the cold/heat that is particularly suitable for existing fan coil cooling unit charges and transforms, and has remarkable social benefit and economic benefit.
The drawings and the specific embodiments:
Fig. 1 fan coil cooling unit is cold/the thermal gauge structural representation
Fig. 2 fan coil cooling unit is cold/the thermal gauge workflow diagram
Among the figure, the 1st, temperature sensor, the 2nd, humidity sensor, the 3rd, blower voltage probe, the 4th, temperature conversion circuit, the 5th, humidity change-over circuit, the 6th, voltage shaping circuit, the 7th, temperature voltage signal amplifying circuit, the 8th, humidity voltage signal amplifying circuit, the 9th, multi-channel a/d converter, the 10th, cpu data process chip, the 11st, pin-saving chip, the 12nd, trigger, the 13rd, liquid crystal display circuit, the 14th, RS-485 communication data conversion chip.
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, apparatus of the present invention mainly comprise temperature sensor 1, humidity sensor 2, blower voltage probe 3, temperature conversion circuit 4, humidity change-over circuit 5, voltage shaping circuit 6, temperature voltage signal amplifying circuit 7, humidity voltage signal amplifying circuit 8, multi-channel a/d converter 9, cpu data process chip 10, pin-saving chip 11, trigger 12, liquid crystal display circuit 13, RS-485 communication data conversion chip 14.
The output signal end of temperature sensor 1, humidity sensor 2 is connected with the input end of temperature conversion circuit 4, humidity change-over circuit 5 respectively; The output terminal of temperature conversion circuit 4, humidity change-over circuit 5 respectively with temperature voltage signal amplifying circuit 7, the input end of humidity voltage signal amplifying circuit 8 is connected; Temperature voltage signal amplifying circuit 7, the output terminal of humidity voltage signal amplifying circuit 8 is connected with the analog quantity input end of multi-channel a/d converter 9; The output signal of blower voltage probe 3 is connected with the input end of voltage shaping circuit 6, trigger 12 respectively; The output terminal of voltage shaping circuit 6 is connected with the analog quantity input end of multi-channel a/d converter 9; The output terminal of trigger 12 is connected with the input end of cpu data process chip 10; The output terminal of multi-channel a/d converter 9 is connected with the input end of cpu data process chip 10; Pin-saving chip 11, RS-485 communication data conversion chip 14 interconnect with cpu data process chip 10 respectively; The output terminal of cpu data process chip 10 is connected with the input end of liquid crystal display circuit 13, and RS-485 conversion chip 14 links to each other with the central management machine of cold/heat source.
This cold/heat metering device is by A/D conversion chip 9, temperature with fan coil air intake air, analog signal conversion such as humidity and fan operation voltage become digital signal, utilize RS-485 communication data conversion chip 14 to obtain the relevant information (mainly comprising: cold/heat source supply water temperature and total water supply flow) of cold/heat source central management machine, these information are handled by cpu data process chip 10, and calculate the cooling/thermal load of fan coil according to correlation formula mentioned above, again to obtaining cooling amount or the heating load of fan coil in a certain period behind the accumulated time; Simultaneously related data is kept at E as required
2In the PROM pin-saving chip 11, and be presented on the LCDs by the cold/thermal load and the cold/heat of liquid crystal display circuit 13 with fan coil.
The moisture signal that temperature signal that is obtained by temperature sensor 1 and humidity sensor 2 obtain is respectively by behind temperature conversion circuit 4 and the humidity change-over circuit 5, become amplitude 5V, the standard electric pulse signal of pulsewidth 20MS, sort signal is respectively through after temperature voltage signal amplifying circuit 7 and 8 processing of humidity voltage signal amplifying circuit, send into after multi-channel A/D conversion chip 9 carries out analog to digital conversion through interface circuit, give cpu data process chip 10 again and handle.On the one hand by becoming amplitude 5V behind the voltage shaping circuit 6, the standard electric pulse signal of pulsewidth 20MS is undertaken sending into cpu data process chip 10 after the analog to digital conversion by A/D conversion chip 9 and handles blower voltage probe 3 with the blower voltage signal that detects; On the other hand, blower voltage probe 3 is passed to trigger 12 with the blower voltage signal that detects, whether trigger 12 is used for controlling cpu data process chip 10 needs work, only under the non-vanishing situation of the blower voltages that blower voltage probe 3 is surveyed, cpu data process chip 10 is just in running order.
As shown in Figure 2, in concrete metering process, this device is monitored the blower voltage of user's fan coil all the time, if voltage is zero, judges that then the user need not be cold or need not heat, and this moment, the other parts of this measuring apparatus were in idle state; If the blower voltage that monitors is non-vanishing, then determine the air quantity of blower fan according to voltage swing, simultaneously, other detection system of this measuring apparatus is started working, air temperature, the humidity at place, monitoring fan unit manage-style side entrance, its communication system also is activated, and sends request signal to the central management machine of cold/heat source, to obtain cold/hot water supply water temperature value and total flow value at that time.Then, according to the relevant data that stores in these parameter values and the chip, utilize foregoing formula to calculate the cold/thermal load of fan coil this moment, at last accumulated time is obtained the cooling/heat of fan coil in a period of time, thereby realize cold/heat metering.
Claims (1)
1, a kind of fan coil cooling unit is cold/thermal gauge, mainly comprise temperature sensor (1), humidity sensor (2), blower voltage probe (3), temperature conversion circuit (4), humidity change-over circuit (5), voltage shaping circuit (6), temperature voltage signal amplifying circuit (7), humidity voltage signal amplifying circuit (8), multi-channel a/d converter (9), cpu data process chip (10), pin-saving chip (11), trigger (12), liquid crystal display circuit (13), RS-485 communication data conversion chip (14), it is characterized in that this device is the wind side-entrance air themperature by the monitoring fan coil, air humidity, the cooling water inlet temperature, parameters such as cold water flow and blower voltage, and serve as to calculate cold/heat metering that fan coil cooling unit is carried out on the basis with the heat transfer theory of air-conditioning coil pipe, temperature sensor (1), the output terminal of humidity sensor (2) respectively with temperature conversion circuit (4), the input end of humidity change-over circuit (5) is connected, temperature conversion circuit (4), the output terminal of humidity change-over circuit (5) respectively with temperature voltage signal amplifying circuit (7), the input end of humidity voltage signal amplifying circuit (8) is connected, temperature voltage signal amplifying circuit (7), the output terminal of humidity voltage signal amplifying circuit (8) is connected with the analog quantity input end of multi-channel A/D conversion (9); The output signal of blower voltage probe (3) respectively with voltage shaping circuit (6), the input end of trigger (12) is connected, the output terminal of voltage shaping circuit (6) is connected with the analog quantity input end of multi-channel a/d converter (9), the output terminal of trigger (12) is connected with the input end of cpu data process chip (10), the output terminal of multi-channel a/d converter (9) is connected with the input end of cpu data process chip (10), pin-saving chip (11), RS-485 communication data conversion chip (14) interconnects with cpu data process chip (10) respectively, the output terminal of cpu data process chip (10) is connected with the input end of liquid crystal display circuit (13), and RS-485 conversion chip (14) links to each other with the central management machine of cold/heat source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031161502A CN1177205C (en) | 2003-04-03 | 2003-04-03 | Draught fan coil pipe air-conditioning system cold / heat quantity metering arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031161502A CN1177205C (en) | 2003-04-03 | 2003-04-03 | Draught fan coil pipe air-conditioning system cold / heat quantity metering arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1448703A true CN1448703A (en) | 2003-10-15 |
| CN1177205C CN1177205C (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031161502A Expired - Fee Related CN1177205C (en) | 2003-04-03 | 2003-04-03 | Draught fan coil pipe air-conditioning system cold / heat quantity metering arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177205C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362441C (en) * | 2005-07-06 | 2008-01-16 | 张诚实 | Fan coil metering control apparatus and heat metering method |
| CN101644588B (en) * | 2009-06-24 | 2011-07-06 | 华南理工大学 | Real-time monitoring and cooling capacity metering method and system for cooling loads of air conditioner end equipment |
-
2003
- 2003-04-03 CN CNB031161502A patent/CN1177205C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362441C (en) * | 2005-07-06 | 2008-01-16 | 张诚实 | Fan coil metering control apparatus and heat metering method |
| CN101644588B (en) * | 2009-06-24 | 2011-07-06 | 华南理工大学 | Real-time monitoring and cooling capacity metering method and system for cooling loads of air conditioner end equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177205C (en) | 2004-11-24 |
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