KR20090110963A - Revising control method of heating time in proportion to open and close of heating valve - Google Patents

Abstract

PURPOSE: A method for compensating heating time according to opening and closing of a heating valve is provided to keep the total flow rate supplied to rooms during a temperature measuring period uniform. CONSTITUTION: A method for compensating heating time according to opening and closing of a heating valve comprises a step of calculating a flow rate of heating water supplied to each room using resistance and pumping head of heating water circulation(S100), a step of setting a heating time to the temperature difference of ΔT which is the difference between the actual temperature and the set heating temperature of each room(S200), and a step of correcting the heating time of each room according to the flow rate change resulting from opening/closing of a heating valve of each room(S300).

Description

REVISING CONTROL METHOD OF HEATING TIME IN PROPORTION TO OPEN AND CLOSE OF HEATING VALVE}

The present invention relates to a heating time compensation control method according to the opening and closing of the heating valve in the heating control system of each room using a temperature measuring cycle, and more particularly, by the heating piping length (or heating area) and opening and closing of the heating valve of each room. The present invention relates to a heating time compensation control method according to opening and closing of a heating valve configured to minimize unnecessary overheating or underheating for each room by correcting and controlling heating time in real time according to a flow rate change.

In general, the thermostat applied to each room heating system compares the present temperature with the set temperature and stops heating when the present temperature reaches the set temperature, or repeatedly operates and stops the heating at a set time. In addition, these two methods are applied in combination.

However, the conventional heating temperature control method has a problem that causes a sudden change in the room temperature and waste of unnecessary heating heat, in particular, in the case of the heating control method for controlling the heating time according to the temperature difference between the set temperature and the room temperature When measuring indoor temperature, indoor air temperature is measured, not indoor floor temperature.

At this time, when heated by the boiler, the indoor floor warms up and the heat storage gradually warms up the indoor air, and the indoor air goes up after a certain heating time, so the indoor floor temperature must be heated much higher than the set temperature. The temperature will reach the set temperature.

As a result, even if the indoor temperature reaches the set temperature, even if the heating of the boiler is stopped, the indoor air is continuously heated by the heat storage of the indoor floor, resulting in an overheating condition in which the indoor temperature exceeds the set temperature.

Patent No. 371896, developed to improve this conventional problem, sets a temperature measurement period, which is a measurement period of the indoor temperature T1 by a temperature sensor, and then sets the temperature when the indoor temperature T1 ≥ a set temperature T0. Boiler heating is terminated during the measurement period, and if the room temperature (T1) <set temperature (T0), the boiler is heated for the heating time set according to the magnitude of the temperature difference (ΔT). A heating control method using a temperature measurement cycle has been published, which is characterized by controlling the boiler heating to be stopped for a time.

However, the heating control method using the temperature measuring cycle described above simply changes the flow rate of the heating water according to the opening and closing of the heating valve of the hot water distributor and the size of the temperature difference ΔT without considering the heating piping length (or heating area) of each room. Since the heating time is determined according to the heating efficiency is lowered, there is a problem that the heating time is absolutely insufficient or unnecessary increase.

The present invention has been made to improve the problem of the heating control method using the conventional temperature measurement cycle, the heating time in real time according to the flow rate change by the heating pipe length (or heating area) and opening and closing of the heating valve during heating. The purpose of the present invention is to provide a heating time compensation control method according to opening and closing of a heating valve configured to control the sum of flow rates during a temperature measuring cycle supplied to each room, thereby preventing unnecessary overheating or underheating. .

In order to achieve the above object, the present invention is a heating control method using a temperature measuring cycle, which is supplied to each room using the resistance (R1, R2, Rp1, Rp2 ..) and head (V) of the heating water circulation. A flow rate value calculating step (S100) for calculating a flow rate (Q1, Q2 ...) of the heating water; A heating time setting step (S200) of a temperature difference ΔT for setting a heating time for a temperature difference ΔT between an actual temperature of each room and a heating preset temperature; Heating valve during heating of each room to correct the heating time of each room according to the change in flow rate by opening and closing the heating valve (v1, v2 ...) of each room during heating (S400); heating valve characterized in that consisting of It provides a heating time compensation control method according to the opening and closing of the.

The present invention configured as described above provides an effect of minimizing unnecessary overheating or underheating by controlling the heating time so that the sum of the flow rates during the temperature measuring cycles supplied to each room is constant according to the heating conditions of each room. Done.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

1 is a control process diagram illustrating an embodiment of a heating time compensation control method according to opening and closing of a heating valve according to the present invention.

In general, in the heating control system of each room using the temperature measurement cycle, the heating time of each room means the sum of the flow rates supplied to each room during the set temperature measurement cycle, and the flow rate supplied to each room as the heating valve of each room opens and closes. If the heating time is not corrected according to the change of the flow rate, it will be less than or exceed the sum of the flow rates to be supplied to each room. If the sum of the flow rates supplied to the room is excessive, there is a problem in that the heating of the room is excessive.

Therefore, the present invention is to control the heating time of each room during the predetermined temperature measurement cycle in real time according to the opening and closing of the heating valve of each room, that is, each room is controlled to be heated by the set heating time, but the heating valve of any of the heating The flow rate supplied to each room is changed while being opened and closed, and the heating time of the heating room is corrected and controlled in real time according to the changed flow rate.

Specifically, the present invention, as shown in Figure 1, using the resistance of the heating water circulation and the head of the circulation pump to calculate the flow rate value of each room for calculating the flow rate of the heating water supplied to each room (S100) and The heating time setting step of the temperature difference ΔT for setting the heating time for the temperature difference ΔT between the actual temperature and the heating set temperature of each room, based on the average flow rate value of each room calculated in the flow rate value calculating step (S100) of each room (S200). And a heating time correction step (S300) before heating of each room for correcting the heating time of each room calculated in the heating time setting step (S200) of the temperature difference ΔT according to the conditions of each room, and according to opening and closing of the heating valve of each room during heating. The heating time correction step of heating of each room for correcting the heating time of each room; consists of.

1. In the flow rate calculation step (S100) of each room, the flow rate of the heating water supplied to each room is calculated by using various resistances and the head of the circulation pump in the heating water circulation.

For example, a four-hole hot water distributor is used for four rooms (1 to 4) with heating pipe lengths or heating areas of 100m (Rp1), 80m (Rp2), 60m (Rp3), and 40m (Rp4), respectively. When heating by using a circulating pump having a head (V) of 800 mbar, calculate the total resistance of the boiler and the resistance of the return pipe R1 to the equivalent length of a pipe having a diameter of 15mm, and calculated as a total of 30m, At the same time, converting R2, which is the resistance generated in the valves, distributors, and connections of each room (1-4) into 20 m, respectively, the head of the circulation pump (V) is 1 mbar to 1 Volt, and the resistances (R1, R2) and heating piping length (Or heating area) (Rp1 to Rp4), 1m is 1Ω, and flow rate (Q) is 1LPM of 1A, the head of the circulation pump (V) = flow rate (Q) x {resistance (R1, R2) + Heating piping length (or heating area) (Rp1 ~ Rp4)}], it is possible to make the electric circuit equivalent circuit of heating water circulation as follows.

At this time, if the total resistance Rm of all rooms is obtained from the equivalent circuit,

1 / Rm = 1 / Rm1 + 1 / Rm2 + 1 / Rm3 + 1 / Rm4 = 1/120 + 1/100 + 1/80 + 1/60 = 0.0475

Rm ≒ 21m,

Flow rate value Q = Total head lift (V) / Total resistance (R1 + Rm)

Since Q = 800 / (21 + 30) m, Q = 15.7 LPM can be obtained.

At this time, Vr is 800 × 21/51 ≒ 329 mbar from the relationship between total head (V) / total resistance (R1 + Rm) = room head (Vr) / room load (resistance) (Rm),

Furthermore, when each flow rate value Q1, Q2, Q3, Q4 of the heating water of each room 1-4 according to the head value Vr = 329 mbar of the heating water supplied to each room similarly is calculated | required,

Q1 = Vr / Rm1 = 329/120 ≒ 2.8LPM

Q2 = Vr / Rm2 = 329/100 ≒ 3.3LPM

Q3 = Vr / Rm3 = 329/80 ≒ 4.1LPM

Q4 = Vr / Rm4 = 329/60 ≒ 5.5LPM

The total flow rate Q = Q1 + Q2 + Q3 + Q4 = 15.7 LPM of the heating water supplied to all the rooms becomes, and the average flow rate value phi = Q / 4 = 3.9 LPM supplied to each room.

2. In the heating time setting step (S200) of the temperature difference ΔT, each room (1 to 1) based on the average flow rate value φ and the average heating pipe length (or average heating area) of each room calculated in the flow rate value calculating step (S100) of each room. The heating time for the temperature difference ΔT between the actual temperature and the set heating temperature of 4) is set.

When average flow rate φ = 3.9LPM is supplied to 70m (280m / 4) of average heating pipe length (or average heating area) of each room, ΔT = 0.5 ℃ for the temperature difference ΔT between each room's actual temperature and heating set temperature. If you set the time to 5 minutes,

For example, when it is assumed that the temperature difference ΔT of each room is 2 ° C., the heating time of each room is set to be controlled by 20 minutes .

3. In the heating time correction step (S300) before heating of each room, the heating time of each room calculated in the heating time setting step (S200) of the temperature difference ΔT is corrected according to the conditions of each room.

If the temperature difference ΔT of each room is assumed to occur 2 ℃, the heating time of each room should be controlled by 20 minutes, but in the present invention, the heating time of each room and the conditions of each room, that is, heating piping length or heating area (Rp1 ~ Rp4) The control is performed to correct according to the flow rate values Q1 to Q4.

In other words, the heating time should be long in proportion to the heating pipe length or the heating area Rp1 to Rp4, and the heating time should be controlled to be shorter as the flow rate values Q1 to Q4 are larger.

1) heating time correction cost calculation step (S301);

In the present invention, the heating time correction ratio is calculated according to the heating piping length or the heating area Rp1 to Rp4 of each room based on the setting of heating time determined based on the average heating pipe length (average heating area) of each room.

That is, the heating time correction ratio for each room is calculated by using the formula of heating pipe length (or heating area) of each room / average heating pipe length (average heating area) of each room as follows.

Heating time compensation ratio of room 1 (Tr1) = 100m / 70m ≒ 1.43

Heating time correction ratio of room 2 (Tr2) = 80m / 70m ≒ 1.14

Heating time correction ratio of room 3 (Tr3) = 60m / 70m ≒ 0.85

Heating time correction ratio of room 4 (Tr4) = 40m / 70m ≒ 0.57

2) setting heating time correction step (S302);

The heating time of each room set on the basis of the average flow rate φ = 3.9 LPM is corrected for the flow rate values Q1 to Q4 of each room.

Room 1's corrected heating time (HT1) = Set heating time × Room 1's heating time correction ratio (Tr1) × Average flow rate value φ / Room 1 flow rate value Q1 = 20 minutes × 1.43 × 3.9 LPM / 2.7 LPM ≒ 41.3 minutes

Room 2's corrected heating time (HT2) = 20 minutes × 1.14 × 3.9 LPM / 3.3 LPM ≒ 26.9 minutes

Room 3's corrected heating time (HT3) = 20 minutes × 0.85 × 3.9 LPM / 4.1 LPM ≒ 16.2 minutes

Room temperature calibrated heating time (HT4) = 20 minutes × 0.57 × 3.9 LPM / 5.5 LPM ≒ 8.1 min

4. In the heating time correction step (S400) of heating of each room, the heating time of each room is corrected according to opening and closing of the heating valves (v1, v2, v3, v4) of each room during heating.

1) When the heating for each room is started according to the corrected heating time (HT1 ~ HT4), the heating for room 4 is stopped after 8.1 minutes and the heating valve v4 is controlled to be automatically closed and supplied to the heating pipe of room 4 Since the flow rate is supplied to the heating piping of the rooms 1,2,3,

When the correction resistance Rm 'of the room 1, 2, 3 is obtained from the equivalent circuit,

1 / Rm '= 1 / Rm1 + 1 / Rm2 + 1 / Rm3 = 1/120 + 1/100 + 1/80 = 0.0308

Rm '≒ 32.5m,

Corrected flow rate Q '= total lift (V) / corrected total resistance (R1 + Rm')

Q '= 800 / (32.5 + 30) m, so Q' = 12.8 LPM ,

Vr ' = 800 x 32.5 / 62.5 = 416 mbar can be obtained from the relational expression of room's correction head (Vr') = total head (V) x room's correction resistance (Rm ') / room total correction (R1 + Rm').

In addition, when each correction flow rate Q1 ', Q2', Q3 'of the heating water of each room 1-3 is calculated according to the correction head Vr' = 416 mbar of the heating water supplied to each room equally,

Q1 '= Vr' / Rm1 = 416/120 ≒ 3.5LPM

Q2 '= Vr' / Rm2 = 416/100 ≒ 4.2LPM

Q3 '= Vr' / Rm3 = 416/80 = 5.2LPM,

The heating time for rooms 1, 2, 3 is calibrated as follows.

Room 1's corrected heating time is (41.3 minutes-8.1 minutes) x Q1 (2.8) / Q1 '(3.5)-26.6 minutes,

Room2's corrected heating time is (26.9 min.-8.1 min.) × Q2 (3.3) / Q2 '(4.2) ≒ 14.8 min,

Room 3's corrected heating time is shortened to (16.2 minutes-8.1 minutes) x Q3 (4.1) / Q3 '(5.2)-6.4 minutes.

2) If the heating to room 3 is stopped after 6.4 minutes, the heating valve v3 is automatically closed and the flow rate supplied to the heating pipe of room 3 is supplied to the heating pipes of room 1 and 2,

When the correction resistance Rm '' of room 1,2 is obtained,

1 / Rm '' = 1 / Rm1 + 1 / Rm2 = 1/120 + 1/100 = 0.0183

Rm '' ≒ 54.6m

Corrected flow Q '' = total lift (V) / corrected total resistance (R1 + Rm '')

Since Q '' = 800 / (54.6 + 30) m, Q '' = 9.5 LPM ,

Vr ' = 800 × 54.6 / 84.6 ≒ 516mbar can be obtained from the relational equation of the room's correction head (Vr'') = total head (V) x room's correction resistance (Rm'') / room correction (R1 + Rm''). Can be.

In addition, when each correction flow rate Q1 '', Q2 '' of the heating water of each room (1-2) according to the correction head Vr '' = 516 mbar of the heating water supplied to each room is obtained,

Q1 '' = Vr '' / Rm1 = 516/120 = 4.3LPM

Q2`` = Vr '' / Rm2 = 516/100 ≒ 5.2LPM

The correction heating time for rooms 1 and 2 is corrected and controlled as follows.

Room 1's corrected heating time is (26.6 minutes-6.4 minutes) × Q1 '(3.5) / Q1' '(4.3) ≒ 16.4 minutes,

The heating time for the room 2 is shortened to (14.8 minutes-6.4 minutes) x Q2 '(4.2) / Q2' '(5.2)-6.8 minutes.

3) Finally, when the heating to room 2 is stopped after 6.8 minutes, the heating valve v2 is automatically closed, and the flow rate supplied to the heating pipe of room 2 is supplied to the heating pipe of room 1,

The resistance of room 1 is Rp1 + R2 = 100 + 20 = 120

Rm '' '≒ 120m,

Corrected flow rate Q '' '= total lift (V) / corrected total resistance (R1 + Rm' '')

Q '''= 800 / (30 + 120) m, so Q'' = 5.3 LPM ,

Number correction head (Vr ''') = total head (V) × number correction resistor (Rm''') / the corrected total resistance (R1 + Rm ''') from the relation of Vr''' = 800 × 120 / 150 = 640 mbar .

Room 1's corrected heating time is shortened to (16.4 minutes-6.8 minutes) x Q1 '' (4.3) / Q '' '(5.3) ≒ 7.8 minutes.

In short, in the present invention, the heating time for each room can be shortened as follows by correcting and controlling the heating time according to opening and closing of the heating valve of each room.

The heating time of room 1; Initial heating time 41.3 minutes → Final control heating time 29.1 minutes

The heating time of room 2; Initial heating time 26.9 minutes → Final control heating time 21.3 minutes

Heating time in room 3; Initial heating time 16.2 minutes → Final control heating time 14.5 minutes

Heating time of room 4; Initial heating time 8.1 minutes → Final control heating time 8.1 minutes

Thus, in the present invention, the heating time of each room during the temperature measurement cycle is set according to the heating pipe length or the heating area of each room, and even if the flow rate supplied to each room is changed by opening and closing the heating valve of each room during heating, It would be technical feature to minimize unnecessary overheating or insufficient heating for each room by correcting and controlling the heating time in real time so that the sum of the flow rates during the temperature measurement cycle is set.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention.

Therefore, the substantial scope of the present invention should not be limited by the above-described embodiment, but should be defined by the same structure as the claims as well as the claims described below.

1 is a control process diagram illustrating an embodiment of a heating time compensation control method according to a heating valve opening and closing according to the present invention.

Claims (3)

In the heating control method using a temperature measuring cycle, Step of calculating the flow rate of each room that calculates the flow rate (Q1, Q2 ...) of the heating water supplied to each room by using the resistance of the heating water circulation (R1, R2, Rp1, Rp2 ..) and the head (V). (S100); A heating time setting step (S200) of a temperature difference ΔT for setting a heating time for a temperature difference ΔT between an actual temperature of each room and a heating preset temperature; Heating valve during heating of each room to correct the heating time of each room according to the change in flow rate by opening and closing the heating valve (v1, v2 ...) of each room during heating (S400); heating valve characterized in that consisting of Heating time compensation control method according to opening and closing of The method according to claim 1, Each room set in the heating time setting step (S200) of the temperature difference ΔT based on the average flow rate value (φ) and the average heating pipe length (or average heating area) of each room in the flow rate value calculating step (S100) of each room. And a heating time correction step (S300) before heating of each room to correct the heating time according to the flow rate (Q1, Q2 ...) and the heating pipe length (or heating area) Rp1, Rp2 .. of each room. Heating time compensation control method according to opening and closing of the heating valve. The method according to claim 2, The heating time correction step before the heating of each room (S300) is performed to correct the heating time of each room set based on the average heating pipe length (or average heating area) of each room in the heating time setting step (S200) of the temperature difference ΔT. A heating time correction ratio calculation step (S301) for calculating a heating time correction ratio (Tr1, Tr2 ...) according to the heating pipe length (or heating area) Rp1, Rp2 .. of the room; In the heating time setting step (S200) of the temperature difference ΔT, the heating time of each room set based on the average flow rate value φ of each room is determined by the heating time correction ratios (Tr1, Tr2 ...) and the flow rates of the respective rooms (Q1, Q2). Heating time correction control method according to the opening and closing of the heating valve, characterized in that consisting of; set heating time correction step (S302) to correct according to.

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