CN101038496A - Air-conditioning intelligent sensor - Google Patents
Air-conditioning intelligent sensor Download PDFInfo
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- CN101038496A CN101038496A CN 200610059840 CN200610059840A CN101038496A CN 101038496 A CN101038496 A CN 101038496A CN 200610059840 CN200610059840 CN 200610059840 CN 200610059840 A CN200610059840 A CN 200610059840A CN 101038496 A CN101038496 A CN 101038496A
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Abstract
The invention discloses an intelligent sensor for a new air conditioner, characterized in that this sensor has a heating wire constant temperature circuit formed by Wheatstone bridge and negative feedback amplifier; two input terminals of the negative feedback amplifier are respectively connected with the output voltage terminals of Wheatstone bridge, the output terminal of negative feedback amplifier is connected with the supply terminal of Wheatstone bridge, a constant temperature heating wire sensor and one adjustable resistor are connected in series between both output voltage terminals of the Wheatstone bridge and earth terminal. The heating wire constant temperature circuit in the invention is used as the intelligent sensor of air conditioner, which may keep the surface temperature and skin cooling speed at a comfortable range, substantially improve the comfort sense of air conditioner.
Description
Technical field
The present invention relates to a kind of artificial atmosphere, heating, ventilation and equipment thereof.Be particularly related to a kind of intelligent air condition sensor that is used for the air governor of room high degree of comfort requirement.
Background technology
Air governor is divided into industrial air-conditioning and comfort air conditioning.Air-conditioning the earliest is applied in industrial earlier, is called industrial air-conditioning, develops comfort air conditioning afterwards gradually, is installed between residential houses.Industrial air-conditioning originates from the 15th century end, to the second half in 19th century be greatly developed.First room air conditioner of China is to be produced by Shanghai air-conditioning factory nineteen sixty-five.Along with improving constantly of China's air-conditioning industrial boom and living standards of the people, the output of air-conditioning, kind, style, function, quality etc. have very big breakthrough and development.
The nineties in 20th century, the air conditioner that China family buys all is a fixed speed air conditioner.Along with the arrival of new century convertible frequency air-conditioner also and then enters family, the capability and performance of air-conditioning is become better and better.The sensor of the electrical control part that wherein plays a major role is also being brought in constant renewal in the replacement.In the window air conditioner of producing in the past the eighties in 20th century, all be to adopt the mechanical pressure type temperature controller, its temperature regulating range is 18 ℃～30 ℃, control accuracy is ± 2 ℃; Afterwards, use thermistor (temperature) sensor to cooperate single-chip microcomputer, can the automatic start-stop air conditioner, and the effect with holding circuit and fault judgement, wherein the temperature fluctuation of fixed speed air conditioner is greater than 1.5 ℃, and transducer air conditioning is ± 0.5 ℃.Hence one can see that, and up to the present transducer air conditioning is the highest air conditioner of comfort level.But all air-conditionings that comprise convertible frequency air-conditioner all are being to adopt thermistor as the indoor temperature controller aspect the indoor control, just considered of the influence of the temperature difference of skin and atmosphere to the skin radiating rate, do not consider the influence of skin surface heat transfer coefficient, still not ideal enough for the comfort level index.Moreover, to compare with thermal resistance as the thermistor of temperature sensor itself, its interchangeability and stability are all relatively poor, and non-linear more serious, also directly have influence on the quality of control.
Life process belongs to the biochemical process that does not intermittently consume chemical energy, release reaction heat under permanent body temperature.All the time be within the normal scope in order to keep body temperature, have quite a few reaction heat to be discharged in the atmospheric environment by skin.When people's activity intensity one timing, need be relatively-stationary by the speed of skin heat radiation.The skin radiating rate not only is directly proportional with the temperature difference of skin and ambient atmosphere, but also is directly proportional with the skin surface heat transfer coefficient.The height of ambient temperature is by the skin perception, the scope of the shell temperature that the people feels comfortably cool compared with the variation range of atmospheric temperature wanted much narrow.Desirable air conditioner should be under comfortable shell temperature be directly set and control skin radiating rate, has the function that shell temperature and skin radiating rate is maintained simultaneously comfort standard.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioning intelligent sensor, use the air conditioner of this sensor can make the comfort level index in room higher.It is skin heat radiation mechanism and the air conditioner intelligent sensor that designs in the simulation life cyclic process.
A kind of air-conditioning intelligent sensor of the present invention is formed the heated filament constant-temperature circuit by Wheatstone bridge and negative-feedback amplifier; Two input ends of described negative-feedback amplifier connect the output voltage terminal of Wheatstone bridge respectively, what be connected in series between the power end of the output termination Wheatstone bridge of negative-feedback amplifier, two output voltage terminals of described Wheatstone bridge and earth terminal is respectively a constant-temperature heating wires sensor and an adjustable resistance
Aforesaid a kind of air-conditioning intelligent sensor, constant-temperature heating wires sensor wherein are the filament that carbon fiber-the platinum compound substance is made.
Aforesaid a kind of air-conditioning intelligent sensor, constant-temperature heating wires are the thick platinum films of plating one deck 4-6 μ m on the carbon fiber of φ 5-10 μ m.
Aforesaid a kind of air-conditioning intelligent sensor, described negative-feedback amplifier comprise input end, amplifying circuit, holding circuit, variable quantity supercircuit, power circuit and the output terminal that connects successively.
Heated filament constant-temperature circuit of the present invention is as the intelligence sensor of air conditioner, can make air conditioner have the function that shell temperature and skin radiating rate is maintained simultaneously comfort standard, heat radiation intension and comfort need that more can objective expression skin have practical significance to improving existing air conditioner comfort.
Description of drawings
Fig. 1 is heated filament constant-temperature circuit figure of the present invention.
Fig. 2 is the circuit block diagram of negative-feedback amplifier of the present invention.
Fig. 3 is the air-conditioner control system block diagram that the present invention adopts heated filament constant-temperature circuit sensor.
Embodiment
The present invention is in order to reach the requirement of desirable air conditioner, the constant-temperature heating wires that is close with normal body temperature with heated filament constant-temperature circuit control, as the air conditioner intelligent sensor to replace common thermistor air conditioner temperature sensor, radiating rate with constant-temperature heating wires there is the heated filament constant-temperature circuit output voltage U of definite corresponding relation as the basic setup parameter of air-conditioner control system, and air-conditioning system is controlled with real-time output voltage values, the space air parameter is regulated and control, with the construction more comfortable living space of human body sensory of sening as an envoy to.
The heated filament constant-temperature circuit is seen Fig. 1, uses constant-temperature heating wires simulated skin surface radiating, and the heated filament constant-temperature circuit is used for air-conditioner control system as the air conditioner intelligent sensor.It is made up of Hui Sitong bridge and negative-feedback amplifier.In the Hui Sitong bridge, Rw is the filament that carbon fiber-the platinum compound substance is made of micron-scale.Be located under the environment temperature Ta, its resistance is Ra, as electric current by the time, resistance changes along with the variation of electric current, i.e. electric current I w big more (little), temperature T
wHigh more (low), R
wBig more (little).The principle of work of heated filament constant-temperature circuit: when the circuit operate as normal, negative-feedback amplifier has automatic adjusting and is applied to output voltage U on the Hui Sitong bridge, changes the R that flows through
wElectric current I
wSize makes R
wResistance value constantly be higher than it at environment temperature T
aUnder resistance R
aThe function of a certain setting resistance value, promptly have the R of making
wTemperature be arranged on the constant environment temperature T that is higher than
aThe function of a certain numerical value.We can be R
wTemperature T
wBe set in people and feel comfortable normal skin temperature T
s(corresponding electric current is I
s, resistance is R
s).In this circuit, by adjusting R
cCan obtain R
sThereby obtain T
sPromptly Mo Ni skin temperature can be by R
cSet.
The temperature of sensing element (" constant-temperature heating wires ") is set in people feels comfortable normal skin temperature, " under steady state (SS), the heat that atmosphere is taken away from ' constant-temperature heating wires ' in the unit interval equals the heat that constant-temperature circuit provides electric current to produce to ' constant-temperature heating wires ' in the unit interval in utilization." this principle; can obtain; bridge output voltage square and the heat taken away from constant-temperature heating wires of atmosphere between exist linear relationship, can utilize the size of voltage signal of the easy collection of heated filament constant-temperature circuit output directly to express the speed (radiating rate) of constant-temperature heating wires distribute heat; Can also release bridge output voltage is atmospheric temperature, flow velocity, the isoparametric comprehensive statement of humidity.When within the skin temperature scope that the temperature constant of heated filament is made the people feel comfortably cool, ambient atmosphere is more similar to the cooling condition of skin to ambient atmosphere to the cooling condition of constant-temperature heating wires, just can simulate the speed of the radiating rate of assessment skin surface with reference to the speed of the radiating rate of constant-temperature heating wires, promptly can learn the speed of (or judgement) skin radiating rate by the size that detects heated filament constant-temperature circuit output voltage U.By theoretical derivation and experimental verification: U is atmospheric temperature, flow velocity, the isoparametric comprehensive statement of humidity (K is relevant with thermal conductivity).So U is the key parameter that the duty of air conditioner is carried out optimization control, the heated filament constant-temperature circuit can be used as the intelligence sensor of air conditioner, this be common with thermistor as temperature sensor can not compare.Because, the heated filament constant-temperature circuit is substituted original temperature sensor as a kind of novel sensor, can make air conditioner have the function that skin temperature and skin radiating rate is maintained simultaneously comfort standard.This sensor also can be used for the detection of humidity and control.
The composition frame chart of amplifier such as Fig. 2: the electric signal that at first picks up the representative environmental change of being exported by the Hui Sitong bridge is also amplified, and then with the fixed power source stack, is added to the power end of bridge again.What also promptly add to electric bridge is not changeless DC voltage when using usually, but the voltage that changes along with environmental change.In addition, this circuit also has defencive function, when heated filament open circuit or electric bridge fault, can cut off the power supply to electric bridge automatically.The effect of circuit: the voltage automatic tracking loop border condition that is added on the electric bridge is changed, and the temperature of keeping heated filament is constant in setting value, and this voltage is exactly the control voltage to air conditioner.
Go up plating one deck platinum film (4-6 μ m is thick) alternative metals filament (φ 5-25 μ m platinum filament or tungsten filament) at carbon fiber (φ 5-10 μ m), can effectively reduce the breakdown rate of sensor, and easily welding.
The advantage of compound substance: compare with tinsel (platinum filament or tungsten filament), because of carbon fiber elastic modulus and tensile strength height, resistivity is than pure platinum height, can prepare little, the easy welding of length-diameter ratio, durable sensor after compound with platinum, helps improving the stability of constant-temperature circuit work.
Applicating example of the present invention: form as the air-conditioner control system of air conditioner intelligent sensor with the heated filament constant-temperature circuit and to see also shown in Figure 3ly, wherein MCU includes program storage, data-carrier store, IO interface, calculation process and control program etc.
As previously mentioned, activity intensity one timing as the people, speed by the skin heat radiation has a comfortable scope, its correspondence a scope of heated filament constant-temperature circuit output voltage U, be referred to as " suitable voltage range ", therefrom can select some different suitable magnitude of voltage Uo to be stored in the data-carrier store in advance, and encode according to the order of sequence, select when supplying to enable air conditioner.When using air conditioner, just can select Uo very easily arbitrarily like this by " remote control reception or panel setting ".When amblent air temperature is crossed when cold or overheated, heated filament constant-temperature circuit output voltage U will exceed " suitable voltage range ".After air conditioner started, " MCU " will be by constantly comparing the size of U and Uo, and voltage is controlled in output after calculation process, regulates the running parameter of compressor and blower fan automatically, changes refrigerating capacity and wind speed etc., to dwindle the difference of U and Uo as early as possible.Promptly make the skin radiating rate reach stable as early as possible, build comfortable indoor air environment.
Claims (4)
1, a kind of air-conditioning intelligent sensor is characterized in that this sensor forms the heated filament constant-temperature circuit by Wheatstone bridge and negative-feedback amplifier; Two input ends of described negative-feedback amplifier connect the output voltage terminal of Wheatstone bridge respectively, what be connected in series between the power end of the output termination Wheatstone bridge of negative-feedback amplifier, two output voltage terminals of described Wheatstone bridge and earth terminal is respectively a constant-temperature heating wires sensor and an adjustable resistance.
2, a kind of air-conditioning intelligent sensor as claimed in claim 1 is characterized in that: constant-temperature heating wires sensor wherein is the filament that carbon fiber-the platinum compound substance is made.
3, a kind of air-conditioning intelligent sensor as claimed in claim 2 is characterized in that: the thick platinum film of plating one deck 4-6 μ m on the carbon fiber of φ 5-10 μ m.
4, a kind of air-conditioning intelligent sensor as claimed in claim 1 is characterized in that: described negative-feedback amplifier comprises input end, amplifying circuit, holding circuit, variable quantity supercircuit, power circuit and the output terminal that connects successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100598400A CN100483287C (en) | 2006-03-15 | 2006-03-15 | Air-conditioning intelligent sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100598400A CN100483287C (en) | 2006-03-15 | 2006-03-15 | Air-conditioning intelligent sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038496A true CN101038496A (en) | 2007-09-19 |
| CN100483287C CN100483287C (en) | 2009-04-29 |
Family
ID=38889433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100598400A Expired - Fee Related CN100483287C (en) | 2006-03-15 | 2006-03-15 | Air-conditioning intelligent sensor |
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| Country | Link |
|---|---|
| CN (1) | CN100483287C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589743A (en) * | 2012-03-15 | 2012-07-18 | 西安广芯电子科技有限公司 | Digital display temperature detection system and digital display temperature detection method |
-
2006
- 2006-03-15 CN CNB2006100598400A patent/CN100483287C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589743A (en) * | 2012-03-15 | 2012-07-18 | 西安广芯电子科技有限公司 | Digital display temperature detection system and digital display temperature detection method |
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| Publication number | Publication date |
|---|---|
| CN100483287C (en) | 2009-04-29 |
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Granted publication date: 20090429 Termination date: 20110315 |