CN101275760B - Three-temperature sensor heat distributor - Google Patents

Abstract

The invention discloses a heating heat metering tri-temperature sensor thermal distributor, including a single chip computer, an influent temperature sensor, a backwater temperature sensor, an indoor temperature sensor and a display, wherein the tri-temperature sensor and the display are respectively connected with the I/O port of the single chip computer storing three formulas: 1.computing the radiator characteristic coefficient A, 2.computing the logarithm average difference in temperature, 3.computing the radiating quantity of the radiator. The tri-temperature sensor thermal distributor isinput with the related parameters of the radiating quantity of the radiator and the interval time into the single chip computer before the installation; the program executes the following steps when computing: reading the temperature of the temperature sensor in fixed interval, computing the logarithm average difference in temperature according to the three read temperature by the formula 2, thenobtaining the radiating quantity of the radiator using the logarithm average difference in temperature and storing into the accumulator of the single chip computer. The invention is suitable for the heating heat metering of the buildings, such as the house, the enterprise and institution and the business building.

Description

Three-temperature sensor heat distributor

Affiliated technical field

The present invention relates to a kind of heating heat distributor, particularly a kind of three-temperature sensor heat distributor.

Background technology

At present, the electronic type heat distributor that domestic and international heating heat metering is used is divided into two classes substantially, one class is the single temperature sensor heat distributor, another kind of is the double temperature sensor heat distributor, the former only calculates heat dissipation capacity according to measuring on the spreader surface certain any temperature as average surface temperature, and the latter is a heat dissipation capacity of measuring radiator according to the temperature difference of spreader surface mean temperature and room temperature.Its shortcoming is:

1, this lacks rationale according to the temperature or the metering method of radiator and room temperature two place's temperature of any on the radiator;

2, because the uncertainty that the radiator mean temperature is measured is inaccurate so heat distributor is fixed on a point measurement mean temperature;

3, correction factor is too many and makeover process is too complicated;

4, for above-mentioned reasons the reading of heat distributor be not reflection actual use heat, so, cause the confusion of charge with regard to this year and last year same reading and the heat of being paid is taken different phenomenons having occurred.

Summary of the invention

In order to overcome above-mentioned deficiency, the invention provides a kind of heating heat metering three-temperature sensor heat distributor, and adopting the logarithm temperature differential method to measure the heat dissipation capacity of radiator, the heat that it measured and showed is the heat of heating agent release that is the heat dissipation capacity of radiator reality in theory.Make the heat of this heat distributor measure more science, it is more reasonable, more fair to charge.

The technical solution used in the present invention is: according to the principle of calorimeter metering heat and the method that computing formula is derived the spreader surface heat dissipation capacity, measure the heating heat.

Three-temperature sensor heat distributor provided by the invention, comprise: one-chip computer and inflow temperature sensor, return water temperature sensor, indoor temperature transmitter and a display, described inflow temperature sensor is installed in the water inlet of radiator, the return water temperature sensor is installed in the water return outlet of radiator, indoor temperature transmitter is installed in measures the indoor temperature place, is storing following three computing formula in the described one-chip computer:

$A=\frac{a\×f\×n\×\mathrm{\θ}}{{\mathrm{\β}}_1\×{\mathrm{\β}}_2\×{\mathrm{\β}}_3}$ ①

The characteristic coefficient of a in the formula---radiator, (producer provides);

The area of dissipation that f---specific radiator is every, m ²

The sheet number that n---specific radiator is every group, sheet;

θ---calculate the time of radiator heat-dissipation amount, s;

β ₁---radiator assembling sheet is counted correction factor;

β ₂---radiator type of attachment correction factor;

β ₃---radiator installation form correction factor;

$\mathrm{\&Delta;}{t}_m=\frac{t_g-t_h}{\ln \frac{t_g-t_n}{t_h-{\mathrm{<figure-callout\; id="2"\; label="t\; n"\; filenames="S07171963020070417E000011.png"\; state="\{\{state\}\}">t</figure-callout>}}_n}}$ ②

Δ tm in the formula: logarithmic mean temperature difference (LMTD), ℃;

t _g: the inflow temperature of radiator, ℃;

t _h: the return water temperature of radiator, ℃;

t _n: the indoor temperature of building, ℃;

Q _θ＝A·(Δt _m) ^1+b ③

Q in the formula _θ---the heat dissipation capacity of radiator, J;

A---1. calculate by formula and to try to achieve;

The characteristic coefficient of b---radiator, (producer provides);

Described heat distributor also should be carried out the following step:

(1), before three-temperature sensor heat distributor is installed: after the model of determining measured radiator, every group sheet are counted θ blanking time, radiator type of attachment and the installation form of n, reading temperature sensor, will calculate parameter a, f, n, θ, the β of A ₁, β ₂, β ₃Formula in the input one-chip computer 1.; With parameter b be input in the one-chip computer formula 3.;

(2), three-temperature sensor heat distributor when the heat of metering radiator, the program in the one-chip computer is carried out the following step:

A, every machine-readable three detected temperature value of temperature sensor of time θ monolithic;

B, according to detected inflow temperature t _g, return water temperature t _hWith indoor temperature t _n2. the substitution formula calculates logarithmic mean temperature difference (LMTD) Δ t _m

C, again with logarithmic mean temperature difference (LMTD) Δ t _mThe substitution formula is tried to achieve the heat dissipation capacity Q of radiator at period θ in 3. _θ

D, with the calorie value Q that tries to achieve _θDeposit the accumulator in the one-chip computer in.

Described three-temperature sensor heat distributor also comprises a communication port, is used for and other intelligent terminal or host computer communication.

The invention has the beneficial effects as follows:

1, the calorie value that utilizes the present invention to survey approaches theoretical value, and the hot numerical value that three-temperature sensor heat distributor shows is the actual calorie value that distributes of radiator;

2, do not need to adjust complicated correction factor;

3, three-temperature sensor heat distributor can be away from radiator, thus the working stability of three-temperature sensor heat distributor, the long service life of device;

4, can not cause the same and different phenomenon of charging of the reading of two heating phase heat distributors.

The present invention is applicable to the heating heat metering of the convector radiator of buildings such as dwelling house, enterprises and institutions, commercial building.

Description of drawings

Fig. 1 is the three-temperature sensor heat distributor hardware block diagram;

Fig. 2 is the three-temperature sensor heat distributor main program flow chart.

One-chip computer 1 inflow temperature sensor 2 return water temperature sensors 3 among the figure

Indoor temperature transmitter 4 displays 5 one-chip computer serial ports 6

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:

Since the characteristic coefficient of the type decided radiator of radiator, thereby different heat transfer properties is just arranged, in a single day selected fansink-type is decided, and then parameter a, f, b also determine thereupon.

If the sheet number of every group of radiator is determined, type of attachment is also definite with the time interval of installation form and reading temperature sensor, then parameter n, θ, β ₁, β ₂, β ₃Value also just determine so far a, f, b, n, θ, β thereupon ₁, β ₂, β ₃Be constant, in its substitution formula; Next as long as according to detected inflow temperature t _g, return water temperature t _hWith indoor temperature t _nCan directly calculate the heat dissipation capacity of radiator.

The radiator that present embodiment is used is two post M-132 types, 10 one group, advance, return pipe is homonymy, and go out under enterprising, mounting means is for being contained in the wall tabernacle, radiator head room clearance 40mm, time interval θ=60 of single-chip microcomputer reading temperature sensor second.Table look-up:

A=2.426, b=0.286, every area f=0.24m ², β ₁=1.00, β ₂=1.00, β ₃=1.11

With a=2.426, f=0.24, n=10, θ=60, β ₁=1.00, β ₂=1.00, β ₃1.=1.11 substitution formula try to achieve A=314.7243

Again with A=314.7243 and b=0.286 substitution formula in 3.:

Q ₆₀＝314.7243(Δt _m) ^1.286；

Need only by t in the following formula _g, t _h, t _nObtain logarithmic mean temperature difference (LMTD):

$\mathrm{\&Delta;}{t}_m=\frac{t_g-t_h}{\ln \frac{t_g-t_n}{t_h-t_n}}$ Can calculate calorie value Q ₆₀

Whenever calculate Q then one time ₆₀Value adds up once, just can obtain the heat of using of whole heating phase.

The invention will be further described below in conjunction with accompanying drawing:

See also Fig. 1, Fig. 1 is the three-temperature sensor heat distributor hardware block diagram.In the present embodiment, that temperature sensor is selected for use is RTD P _t1000, and temperature sensor 2 matches through strict with temperature sensor 3; Display is LCD.

See also Fig. 2, Fig. 2 is the three-temperature sensor heat distributor main program flow chart; System is in step 201 initialization, read clock in step 202 then, judge whether that in step 203 60 seconds regularly: be, then in the data of step 204 reading temperature sensor, calculate calorie value in step 205 according to formula then, at step 206 calorie value that adds up, carry out other handling procedures in step 207, and jump to step 202 circulation and carry out; If, then forward step 207 to and carry out other handling procedures, and jump to step 202 circulation execution if deny in the judged result of step 203.

Claims (2)

1. three-temperature sensor heat distributor, it comprises an one-chip computer (1), inflow temperature sensor (2), return water temperature sensor (3), indoor temperature transmitter (4) and a display (5), described inflow temperature sensor (2) is installed in the water inlet of radiator, return water temperature sensor (3) is installed in water return outlet, indoor temperature transmitter (4) is installed in measures the indoor temperature place, is storing following three computing formula in the described one-chip computer (1):

$A=\frac{a\&times;f\&times;n\&times;\mathrm{\&theta;}}{{\mathrm{\&beta;}}_1\&times;{\mathrm{\&beta;}}_2\&times;{\mathrm{\&beta;}}_3}$ ①

The characteristic coefficient of a in the formula---radiator, producer provides;

The area of dissipation that f---specific radiator is every, m ²

The sheet number that n---fixed radiator is every group, sheet;

θ---calculate the time of radiator heat-dissipation amount, s;

β ₁---radiator assembling sheet is counted correction factor;

β ₂---radiator type of attachment correction factor;

β ₃---radiator installation form correction factor;

$\mathrm{\&Delta;}{t}_m=\frac{t_g-t_h}{\ln \frac{t_g-t_n}{\mathrm{th}-\mathrm{tn}}}$ ②

Δ t in the formula _m: logarithmic mean temperature difference (LMTD), ℃;

t _g: the inflow temperature of radiator, ℃;

t _h: the return water temperature of radiator, ℃;

t _n: the indoor temperature of building, ℃;

Q _θ＝A·(Δt _m) ^1+b ③

In the formula _QThe heat dissipation capacity of θ---radiator, J;

A---1. calculate by formula and to try to achieve;

The characteristic coefficient of b---radiator, producer provides;

It is characterized in that described three-temperature sensor heat distributor also should be carried out the following step:

(1), before three-temperature sensor heat distributor is installed, after the model of determining measured radiator, every group sheet are counted θ blanking time, radiator type of attachment and the installation form of n, reading temperature sensor, will calculate parameter a, f, n, θ, the β of A ₁, β ₂, β ₃Formula in the input one-chip computer 1.; With parameter b be input in the one-chip computer (1) formula 3.;

(2), three-temperature sensor heat distributor when the heat of metering radiator, the program in the one-chip computer is carried out the following step:

A, every machine-readable three detected temperature value of temperature sensor of time θ monolithic;

B, according to detected inflow temperature t _g, return water temperature t _hWith indoor temperature t _n2. the substitution formula calculates logarithmic mean temperature difference (LMTD) Δ t _m

C, again with logarithmic mean temperature difference (LMTD) Δ t _mValue substitution formula try to achieve the heat dissipation capacity Q of radiator in 3. at period θ _θ

D, with the calorie value Q that tries to achieve _θDeposit the accumulator in the one-chip computer in.

2. three-temperature sensor heat distributor according to claim 1 is characterized in that, it also comprises a communication port.

Images