KR101101772B1 - The heating water flow control system by flow detection - Google Patents

Abstract

PURPOSE: A flow sensing type hot water dispersing system is provided to prevent noise and flow rate leaning by uniformly maintaining differential pressure by circulating and supplying a fixed rate of hot water. CONSTITUTION: A flow sensing type hot water dispersing system comprises a supply pipe hot water distributor(2), a return pipe hot water distributor(3), a valve driver(8), an electric valve(9), a main valve(6), a flow sensor(4), and a flow control main valve actuator(5). The supply pipe hot water distributor and return pipe hot water distributor are connected to a supply pipe(1) and a return pipe(7), respectively. The valve drivers and electric valves are mounted on each branch pipe between the hot water distributors. The electric valve is opened and closed by a control box(10) connected to a temperature controller. The main valve and the flow sensor are installed in the return pipe and restrict the maximum warming quantity provided to the hot water distributor. The flow control main valve actuator controls the main valve.

Description

The heating water flow control system by flow detection

The present invention relates to a flow rate sensing hot water distribution flow rate control system, and more specifically, in the hot water distributor in which the electric valves are opened and closed by the temperature controllers of each room are provided with electric valves for opening and closing the hot water flowing in each room In addition, a flow sensor, a main valve, and a control box are provided on the return pipe (or supply pipe) side, and the opening position of each electric valve is initially set, and the frictional resistance of the pipe inside the heating coil and the frictional resistance of the valve are initially set. In consideration of this, allocated flow rate of each room is converted into search flow rate and compared with the real-time flow rate of the flow sensor and stored in the control box at the optimum position, and then only the summed flow flows whenever each electric valve is opened by a predetermined opening degree. It relates to a flow rate sensing hot water distribution flow rate control system in which the flow rate sensor and the main valve controls the flow rate in real time The.

In general, the heating system installed in a house or apartment can control the temperature by opening and closing the heating water flowing to each room by controlling individual electric valves attached to the hot water distributors in the temperature controllers installed in each room. However, when the individual valves in a specific room are closed, the head is increased due to the characteristic of the pump that circulates the whole hot water, and the supply pipe pressure of the hot water distributor is increased so that the flow rate is increased. Falling phenomenon occurs. In particular, in the case of central heating or district heating, which calculates the heating cost based on the total flow rate for each household, the heating cost reduction effect by adjusting the amount of hot water may not be measured.

In view of this, Korean Patent No. 902306 detects the opening / closing of each branch pipe valve (individual valve) of the hot water distributor, and calculates the opening ratio of the number of open valves, which is the ratio of the number of open branch pipe valves, to the total number of branch pipe valves. Therefore, a technique for controlling the flow regulating valve has been proposed such that a flow rate value of the heating water passing through the supply pipe and the return pipe is a flow rate value obtained by multiplying the maximum flow rate value by the opening ratio of the valve opening.

However, because these technologies have different maximum flow rate values for each generation, it is time-consuming to measure and adjust the exact flow rate value for each generation. Also, if the heating load changes by extending the veranda or expanding or remodeling the room, a technician is called. There was an irrationality that the maximum flow rate value had to be adjusted again.

In Korean Patent No. 835707, a mechanical differential pressure control system has been proposed. The differential pressure control valve for controlling the pressure difference is connected to the water supply header and the return header to adjust the internal pressure of the hot water distributor. The differential pressure control valve, which receives the pressure through the positive pressure signal tube, is connected to the fluid passage by the movement of the piston. By adjusting the opening and closing of the automatic control of the flow rate discharged to the return pipe through the return header to reduce the pressure difference between the water supply header and the return header.

However, the conventional differential pressure control valve using a mechanical diaphragm has a disadvantage that it is made of a combination of small parts such as a spring and a piston, and the internal structure is complicated, the product is expensive, and malfunction occurs when scale is generated due to corrosion.

In addition, Korean Patent No. 10-0980753 has been proposed an electronic differential pressure control system to supplement the problems of the above patent, and in Korean Patent No. 10-0865948, the flow rate is set by direct electric valve opening degree adjustment without manual micro flow rate control valve There is also a proposed system.

In addition, Korean Patent No. 924360 includes a control program for distributing a flow rate, an angle value according to the opening area of the flow valve, and a motor driving time are stored in a table, and a memory for storing various data generated during flow rate distribution; An angle of a flow valve which is connected to the plurality of temperature controllers and finally determines a flow rate for supplying the respective chambers according to the operation of the plurality of temperature controllers, and supplies the flow rate to the chambers corresponding to the finally determined flow rate. A central processing unit for generating a control signal has been disclosed. The central processing unit is an angle control signal generated by the plurality of temperature controller when the flow rate exceeds the reference flow rate compared to the consumption flow rate and the reference flow rate that varies depending on the operation of the plurality of temperature controller when determining the flow rate of each chamber If the consumption flow rate is smaller than the reference flow rate, the supply flow rate of each chamber is determined based on the heating length and the differential pressure information of the chamber to be heated, and the corresponding flow valve according to the determined supply flow rate of each chamber. Generates an angle control signal for adjusting the opening area of the.

However, since the conventional patent only calculates the supply flow rate and the flow rate by calculation, it is impossible to accurately match the supply flow rate with the consumption flow rate by measuring the real-time flow rate flowing through the heating pipe, and thus it is impossible to prevent the flow of water from flowing perfectly. If the length of the heating pipe is changed due to the expansion and contraction, the calculation formula does not fit, there was a disadvantage such as not available.

In view of the conventional problems, the present inventors patented a flow control system in which the differential pressure is kept constant and the flow rate is eliminated by proportionally controlling the main valve by real-time monitoring the combined flow rate according to the opening and closing of the electric valve in each room with a flow sensor. He is being elected as 2011-0003855.

The present invention embodies a patent of the inventor of the present application, and an object of the present invention is to install a flow rate sensor and a main valve on the return (or supply) side of the hot water distributor, and to return (or supply) the flow rate required by the hot water distributor. The differential pressure (supply pressure-return pressure) is kept constant so that noise and flow rate dropping does not occur when opening and closing the control valves attached to the hot water distributor, and also supplying (or returning) the hot water distributor. Since the maximum flow rate is controlled by the main valve to flow only the required flow rate (open number of the electric valves) is to provide a flow-sensitive hot water distribution flow control system that does not require a separate constant flow valve.

Another object of the present invention is a method of setting the opening position of a corresponding electric valve so that the flow rate assigned to each heating coil always flows constantly, without simply determining the opening degree of the electric valve close to the flow rate assigned to each room. In order to automatically search and store at the optimum position by comparing the flow rate obtained by the program-input formula and the real-time flow rate of the flow rate sensor, taking into consideration the flow loss part due to the internal pipe frictional resistance and the frictional resistance of the valve. Therefore, when each electric valve is opened, it is automatically opened at the initial opening only as much as the stored opening position, so that the assigned flow rate is precisely flowed. Thus, the accuracy is higher than the manual scale dial operation fine control valve or the data writing method. Flow-sensitive hot water distribution to reduce errors Is the amount of control systems to provide.

Thus, the present invention maintains the differential pressure and has the function of a separate constant flow valve, and the flow-sensitive hot water distribution flow rate control has the advantage that the flow rate allocated to each room flows correctly when the room electric valve is opened. To provide a system

The present invention provides a differential pressure maintaining function of the first hot water distributor: to supply the hot water distributor only as much as the sum of the flow rates assigned to the heating coils in each room, and the sum of the flow rates of the open rooms by the flow rate value of each room preset by the temperature controller. The main valve is adjusted by comparing with the feedback flow rate value calculated in the control box and measured by the flow rate sensor. As a result, the differential pressure applied to the hot water dispenser is kept constant so that the residual flow of the coil due to the closing of the valve does not increase the flow rate or cause noise.

Second, the flow rate limiting function to limit the flow rate by generation: The total flow rate of the flow rate value allocated to each coil is the limit flow rate value by generation, and the heating water is not supplied above this value by the flow sensor and the main valve.

Third, automatic search and storage of electric valve opening position of each room: The initial differential pressure applied to the hot water distributor when the opening of the electric valve opening of each room is initially set will open (100% open) the electric valve of the room with the longest heating coil, After the valve is completely closed, if the flow sensor and the main valve are adjusted to flow the assigned flow rate in the room with the longest heating coil, the pressure in this state becomes the standard differential pressure. Based on this, the search flow value for finding the opening position of the electric valve that can flow the flow rate allocated to the other rooms is calculated and the main valve is left open. When the flow rate detection seek flow is reached (in error range), the position is stored in the storage box of the control box. The other motorized valves are searched in the same order.

The present invention is a real-time flow rate obtained by the flow rate sensor based on the search flow rate value obtained by the calculation formula previously input into the control box in consideration of the portion of the flow loss due to the internal frictional resistance of the heating coil and the frictional resistance of the valve inside, etc. Since the opening degree is determined so that the flow rate assigned to the corresponding electric valve flows, it is different from the conventional valve opening determination obtained only by the experimental data DATE, and more accurate individual flow rate setting is possible.

According to the present invention, the differential pressure (supply pipe hot water distributor header pressure-return pipe hot water distributor header pressure) is kept constant even when the electric valves for opening and closing the heating water flowing to the heating coils by the temperature controllers installed in each room are open or closed. Therefore, stable heating is maintained by not changing the heating flow rate of the open heating coil, and there is no noise caused by the flow rate phenomenon. In addition, the heating cost is saved by measuring the amount of heating water used.

The maximum flow rate of the heating water (sum of the flow rate assigned to each heating coil) is the flow rate limited to the constant flow rate valve. This function is performed by the main valve of the present invention, and thus a separate flow rate valve installation is omitted. Since the automatic valves at the initial setting open the electric valves in each room by the set opening position, the correct heating flow flows, so the flow rate is proportional to the length of the heating coil in the room. Micro flow control valve is omitted. Since the opening position of each electric valve is stored, there is no risk of changing the flow rate setting value. Also, the opening degree is set compared with the real-time flow rate of the flow sensor, so the flow rate application error assigned to each heating coil or the valve actuator provided in the electric valve Accurate flow distribution can be achieved because the actual flow error due to the mechanical error can be eliminated.

In addition, the flow rate sensor and main valve are installed on the return pipe side of the hot water distributor to supply hot water to each room, so the differential pressure of the hot water dispenser is kept constant by precise flow control by detecting the flow rate, so no noise or flow dropping occurs. It's a system that works for you. In addition, the fixed flow valve restricting the supply flow rate by generation and the manual fine flow valve installed for balancing the heating water supply flow rate in rooms with different heating coil lengths are omitted, and these functions are performed by the main valve and the electric valve for each room. It is a system that can control heating water flow rate.

1 is a conceptual diagram of a flow control system of an embodiment of the present invention
Figure 2 is a block diagram of a flow control system of one embodiment of the present invention
3 is a flow chart of the flow control system of an embodiment of the present invention
Figure 4 is a cross-sectional view of the main valve of the flow control system of an embodiment of the present invention
5 is a cross-sectional view of a flow sensor of the flow control system of an embodiment of the present invention

The present invention is provided with a supply pipe (1) and a supply pipe hot water distributor (2) and a return pipe hot water distributor (3) connected to the supply pipe 1 and the return pipe (7) in which the heating water is circulated as shown in FIGS. The hot water distributors (2) and (3) are installed in each home, and between them a valve driver (8) and a motor valve (9) are installed in a set for each of a plurality of branch pipes according to the number of rooms. It is opened and closed by a control box 10 connected to the temperature controller 11 of the room. The return pipe (3) is provided with a main valve (6) and a flow rate sensor (4) for limiting the maximum amount of heating water supplied to the hot water distributor (2) (3), the main valve (6) is the flow rate control main It is controlled by the valve driver (5).

In FIG. 5, the flow sensor 4 has an impeller 4b which rotates in proportion to the flow of the heating water in the inner passage 4a, and the permanent magnet 4c is contained in the circular ring attached to the impeller shaft. Detects an electrical signal. The flow rate signal detected in real time is sent to the flow rate detection unit 18 of the control box 10, the control signal according to the flow rate required in the control box 10 to the main valve driver (5) by the stepping motor to the main valve ( 6) is adjusted.

In FIG. 4, the main valve 5 and the main valve driver 6 are coupled to each other to operate. The main valve 5 has a passage 6a in which heating water flows in one direction, and the valve plate 6b for adjusting the passage 6a is vertically elevated with respect to the passage 6a. Connected with The valve shaft 15 is held upward by the valve plate 6b by the spring 6c. Inside the main valve driver 5, the valve shaft 15 moves up and down in accordance with the rotation of the elliptical protrusion 14 provided on the horizontal shaft 13 in which the bidirectional stepping motor 12 is coupled to the output shaft gear 12a. The flow rate is controlled by adjusting the passage 6a through which the heating water flows.

The control box 10 has a power supply unit 22 and a control unit 21 on the PCB electronic circuit board and is provided with a number of input and output terminals. The flow rate values assigned by the temperature controllers 11 of the respective rooms are summed up by the flow rate setting unit 19 of the control box 10 (rooms in the heating state) and sent to the control unit 21. The real-time flow rate value detected by the flow rate sensor 4 is sent to the control unit 21 via the flow rate detecting unit 18, and the control unit 21 calculates the flow rate comparison unit 23 and outputs the signal from the main valve driving unit 16. And convert it to main valve driver (5) to control main valve (6). In addition, the flow rate value detected by the flow rate sensor 4 in real time is displayed on the flow rate display unit 20 in the control box 10.

And the position search operation part 24 for setting the opening position of each electric valve 9 is provided. Each room has an assigned flow rate depending on the length, diameter and flow rate of the heating coil.Because the flow loss caused by the internal pipe frictional resistance of the heating coil and the frictional resistance inside the valve is different, the opening degree of the electric valve in each room is adjusted. To ensure that the assigned flow rate flows. The present invention calculates the search flow rate (SQN) obtained by the calculation formula (Equation 1 to be described later) input in advance into the control box 10 in consideration of this in each room at the time of initial setting to store in the storage unit 25 do.

In the initial setting, the main valve 6 closes all the electric valves 9 in the open state, and gradually opens only the electric valve 9 to set the opening degree, and the real-time flow rate obtained from the search flow rate and the flow rate sensor 4. When the opening degree of the electric valve 9 is fixed at the optimum position compared with the flow rate comparison determination section 23, the position search calculation unit 24 calculates the valve opening position value at that time and stores the same in the storage unit 25. Save it.

The valve actuator 8 and the electric valve 9 of each room open or close these electric valves 9 by the heating conditions of the corresponding temperature regulator 11. The signal coming into the control box 10 from the temperature controller 11 is input to the control unit 21 via the valve opening and closing instruction unit 26 and converted into an output signal from the electric valve driving unit 17 to the valve drivers 8 of each side. When sent, the electric valves 9 in each room are opened and closed.

The function of controlling the opening degree of the electric valve 9 is to flow only the flow rate assigned to each heating coil is the core of the present invention. Each valve driver 8 includes a magnet AC motor and rotates by the number of input pulses. The maximum opening takes 15 seconds and the number of pulses is 900. In other words, it has a resolution of about 1/900 so that the valve opening degree can be adjusted. Each room has an assigned flow rate value. The assigned flow rate value compares the real-time flow rate obtained by the search flow rate (SQN) with the flow rate sensor (4) only once at the initial setting of the optimum position at which the corresponding electric valve (9) should be opened. Automatically search to store the position in the storage unit 25 of the control box 10.

Each of the electric valves 9 are operated by reading the open position from the storage unit 25 when the opening operation is performed according to the opening signal, which automatically detects the opening degree so that the electric valves 9 of each room are opened by the assigned flow rate. The algorithm is as follows. First, when setting the opening degree of the electric valves 9 in each room, the differential pressure condition should be constant.

Diagram of Differential Pressure on Hot Water Dispenser

In the hot water distributor (2) (3), the main valve (6) is automatically operated by the flow sensor (4) so that the assigned flow rate flows while the electric valve (9) of the room with the longest heating coil is opened in the open state. Adjust. In this state, the opening and closing conditions of the respective electric transmission valves 9 depended on the hot water distributor 2 and 3 as the reference differential pressure ΔP 1 applied to the hot water distributor are provided. ) Is the pressure to maintain. In this differential pressure, the valve opening position should be searched according to the flow rate of other chambers.

The abbreviations of the variables required for explanation are as follows.

RL: Piping resistance of longest coil + valve resistance in expanded state

RX: Main valve (6) resistance in the state where the flow rate regulated by the flow rate flows while only one valve (9) of the longest coil is opened (100% open)

ΔP1: P1-P2, ΔP2: P2-P3, P: ΔP2 / ΔP1

QL: Flow rate assigned to the longest heating coil (ℓ / min)

QN: Flow rate assigned to each heating coil (ℓ / min)

SQN: Each room heating coil search flow rate for searching the opening position (ℓ / min)

Estimation of flow rate to flow to each room coil for automatic search of valve opening position

In Table 1, the supply water pressure P1 applied to the heating pipe network is

       P1 = (DELTA) P1 + (DELTA) P2 and P1 is the same as the value of "Table 1".

       P1 = (RL + RX) x QL and ΔP1 becomes RL x QL.

From `` Table 2 ''

       The RN value is a condition under which the differential pressure in Table 1 must be the same.

       Can be calculated as RN = RL x QL / QN,

The search flow rate SQN, which can search the open position, can be obtained from the following equation.

                 RL x QL + P x RL x QL

        SQN = -------------------------

                    RN + P x RL

                 (1 + P) x RL x QL

           = ----------------------

RL x QL / QN + P x RL

                 (1 + P) x RL x QL x QN

          = -------------------------------

RL x QL + P x RL x QN

   (1 + P) x QL  x QN

          = -------------------------- (Equation 1)

QL  + P x QN

In general, in a hot water distributor, the heating coil flows from 0.008 to 0.015 (l / min) per meter (based on lease or general house). A total of 400 meters of heating coil is 3.3 to 6 (l / min). Here, the supply pressure and the return pressure (parallel differential pressure across the pure heating coil: ΔP1) are determined and ΔP2 is calculated assuming the supply pressure P1.

 Heating coil length and flow rate relationship by room Room number Heating coil length (m) Allocated Flow Rate (ℓ / min) Search flow rate (ℓ / min) Room 1 120 1.8 1.8 2nd room 100 1.5 1.74 Room 3 80 1.2 1.66 Room 4 60 0.8 1.49 Room 5 40 0.6 1.35

In the above "Table 1" and "Table 3", it is assumed that the longest heating coil length is 120 (m) and the resistance value is 12 in proportion to the length, and the assigned flow rate is 1.8 (l / min) and P value. ΔP1 is 12 × 1.8 = 21.6, ΔP2 is 21.6 × 5 = 108, and P1 = 21.6 + 108 = 129.6. At this time, the resistance value applied to the main valve 6 is 60 (108 / 1.8).

Assuming that the heating coil length of the second room is 100 (m) and the assigned flow rate is 1.5 (ℓ / min), the search flow rate SQN = 16.2 / (1.8 + 7.5) = 1.74 at this time.

Assuming that the heating coil length of the third chamber is 80 (m) and the flow rate is 1.2 (ℓ / min), the search flow rate SQN = 1.66 at this time is given by Equation 1,

Assuming that the heating coil length of the 4th room is 60 (m) and the flow rate is 0.8 (ℓ / min), the search flow rate SQN = 1.49 at this time according to Equation 1,

Assuming that the heating coil length of the fifth chamber is 40 (m) and the flow rate is 0.6 (L / min), the search flow rate SQN at this time is 1.35 according to Equation 1.

In order to flow the allotted flow rate under the same differential pressure condition, the search flow rate value is calculated by the formula converted into the pressure distribution in order to equalize the conditions when the opening position is found. In practice, the allocation flow rate value and the search flow rate value are different as shown in Table 3.

The water distribution to be distributed in the hot water distributor and the assigned flow rate are determined so that the differential pressure ΔP1 can be measured in advance, and since the supply water pressure P1 can also be measured and known, the P value can be calculated. The search flow rate value according to the valve opening position and the predetermined allotted flow rate value are compared at the flow rate comparison determination section 23 of the controller 21 so that they are optimally adjusted, and the opening position at the time of the electric valve 9 is then searched. ) Can be stored in the storage unit 25, and the P value (pressure distribution coefficient) is input in advance.

Referring to Figure 3 describes the automatic opening process of the opening position of each electric valve,

First, the initial setting of the main thermostat 11 for the living room is entered, and the flow rate values assigned to the respective electric valves 9 are sequentially stored. After that, the pressures P1, P2 and P3 applied to both ends of the hot water distributor 2 and 3 and the main valve 6 are measured to calculate and store the differential pressure (P value). Then, when the valve opening position search start is pressed, the electric valve 9 of the room with the longest heating coil is opened to the maximum, and the electric valve 9 of the other room is closed. In normal operation, the opening position of the electric valve (9) with the longest heating coil in the hot water distributor always remains open (the longest coil does not adjust the opening). When the electric valve 9 of the long room is opened, the main valve 6 is adjusted and fixed to the assigned flow rate. In this state, the opening position of the electric valve 9 in the other rooms is automatically found and stored by the search flow rate.

The flow rate comparison unit 23 of the control box 10 compares the real-time flow rate detected by the flow rate sensor 4 with the first flow rate input from the flow rate setting unit 19 to close the main valve. The control signal is sent to the main valve driving unit 16 through the control unit 21 so that the 6 is stopped. Since the main valve 6 is fixed at the adjusted position, the first electric valve 9 of the longest heating coil is closed.

The opening position search method of the electric valve 9 of other rooms is found by the search flow rate (SQN) value calculated by the flow rate value assigned to the heating coil of each room. The first valve electric valve 9 is closed and the main valve 6 ) Is a real-time flow rate obtained by the flow rate detection of the flow rate sensor 4 and the corresponding electric valve by gradually opening the electric valve 9 of the room (rooms 2, 3, 4, 5) to be searched while maintaining the opening degree thereof. At the position where the search flow rate SQN set in (9) is close, it is determined as the opening position of the electric valve 9, and the opening position is calculated by the position search calculation unit 24 to store the storage unit ( 25). In the same way, the opening position of the electric valves 9 of the other rooms is searched and stored. When the search end display appears in the display unit of the main temperature controller 11 for the living room to complete the initial setting.

Thus, in normal operation, since each opening of the electric valve 9 is performed, the opening position is set by the search flow rate, so the actual flow rate considering the frictional resistance of the pipe flows, and the main valve 6 opens the electric valve 9. Since the opening and closing is adjusted in proportion to the real-time flow rate and the total flow rate of the flow rate sensor 4 so that only the sum of the flow rate assigned to the field flows, the differential pressure applied to the hot water distributors 2 and 3 is kept constant, and each electric valve 9 Flow rate assigned to the) flows accurately, and since the main valve (6) limits the total flow rate limiting the supply for each generation, there is no need for a separate flow rate valve.

1: supply pipe 2: supply pipe hot water distributor
3: return pipe hot water distributor 4: flow sensor
5: Main valve driver 6: Main valve
7: return pipe 8: valve actuator
9: electric valve 10: control box
11: temperature controller 12: stepping motor
13: horizontal axis 14: elliptical protrusion
15: valve shaft 16: main valve drive unit
17: electric valve drive unit 18: flow rate detection unit
19: flow rate setting part 20: flow rate display part
21 control unit 22 power supply unit
23: flow rate comparison unit 24: position search operation unit
25: storage unit 26: valve opening and closing instruction unit

Claims (5)

delete A plurality of electric valves (9) are provided between the supply pipe hot water distributor (2) and the return pipe hot water distributor (3) to adjust the flow rate circulated to the hot water coils in each room, and the return pipe (7) has a flow sensor (4) and In the flow rate sensing hot water distribution flow rate control system provided with a main valve (6) to adjust the total flow rate,
At the time of initial setting, the flow rate allocated to each room is converted into the search flow rate SQN calculated in consideration of the pipe frictional resistance, and compared with the real-time flow rate detected by the flow rate sensor 4, and at a position close to the search flow rate. By setting the opening position of the corresponding electric valve 9 in each room and storing the value in the control box 10, the electric valves 9 of the other rooms are also set and stored under a predetermined differential pressure condition. 9) They are opened only by a predetermined opening degree and the main valve 6 is adjusted in real time by the flow sensor 4 so that the combined flow rate of each room is maintained,
In the initial setting, the electric heating valve 9 of the longest heating coil is opened to the maximum, and the main valve 6 is gradually opened, and the real-time flow rate detected by the flow rate sensor 4 is compared with the allotted flow rate of the longest room. By fixing the opening degree of the main valve (6) in the proximity position, and then close the electric valve (9) of the longest room and set the opening of the electric valve (9) of the remaining rooms to the search flow rate of the corresponding electric valve (9) , Flow rate sensing hot water distribution flow rate control system characterized in that the opening degree setting is made under a constant differential pressure condition. A plurality of electric valves (9) are provided between the supply pipe hot water distributor (2) and the return pipe hot water distributor (3) to adjust the flow rate circulated to the hot water coils in each room, and the return pipe (7) has a flow sensor (4) and In the flow rate sensing hot water distribution flow rate control system provided with a main valve (6) to adjust the total flow rate,
At the time of initial setting, the flow rate allocated to each room is converted into the search flow rate SQN calculated in consideration of the pipe frictional resistance, and compared with the real-time flow rate detected by the flow rate sensor 4, and at a position close to the search flow rate. By setting the opening position of the corresponding electric valve 9 in each room and storing the value in the control box 10, the electric valves 9 of the other rooms are also set and stored under a predetermined differential pressure condition. 9) They are opened only by a predetermined opening degree and the main valve 6 is adjusted in real time by the flow sensor 4 so that the combined flow rate of each room is maintained,
The control box 10 is provided with a flow rate setting unit 19 for summing the flow rate value set in each room temperature controller 11 and sending it to the control unit 21, the real-time flow rate input from the flow rate sensor 4 and the A flow rate comparison judging part 23 for adjusting the opening degree of the main valve 6 by comparing the set flow rate of the flow rate setting part 19 is provided, and a storage part for storing the opening positions of the electric valves 9 of the respective rooms. (25) is provided, characterized in that the valve opening and closing instruction unit 26 is provided so that the electric valves 9 corresponding to the respective temperature controllers 11 are opened only by the opening position recorded in the storage unit 25. Flow sensing type hot water distribution flow control system. The method of claim 3, wherein
In the control box 10, when the opening position of each electric valve 9 is searched at the initial setting, a position search for sending a control command to the control unit 21 to calculate the position value and store it in the storage unit 25 is performed. Flow detection type hot water distribution flow rate control system characterized in that the operation unit 24 is provided. A plurality of electric valves (9) are provided between the supply pipe hot water distributor (2) and the return pipe hot water distributor (3) to adjust the flow rate circulated to the hot water coils in each room, and the return pipe (7) has a flow sensor (4) and In the flow rate sensing hot water distribution flow rate control system provided with a main valve (6) to adjust the total flow rate,
At the time of initial setting, the flow rate allocated to each room is converted into the search flow rate SQN calculated in consideration of the pipe frictional resistance, and compared with the real-time flow rate detected by the flow rate sensor 4, and at a position close to the search flow rate. By setting the opening position of the corresponding electric valve 9 in each room and storing the value in the control box 10, the electric valves 9 of the other rooms are also set and stored under a predetermined differential pressure condition. 9) They are opened only by a predetermined opening degree and the main valve 6 is adjusted in real time by the flow sensor 4 so that the combined flow rate of each room is maintained,
In the initial setting of the main temperature controller 11 for the living room, the flow rate values assigned to the respective electric valves 9 are sequentially set, and when the opening of the electric valves 9 of the respective rooms is started, the electric heating of the room with the longest heating coil is started. The valve 9 is opened to the maximum and the electric valves 9 of the other rooms are all closed. Then, the flow rate sensor 4 detects the flow rate so that the assigned flow rate flows, and the main flow rate approaches the real time flow rate and the assigned flow rate. The valve 6 is opened and closed, and when the opening degree of the main valve 6 is determined, the electric valve 9 of the room with the longest heating coil is closed with the position fixed, and the remaining rooms to set the opening degree are driven. When the valve 9 is sequentially opened and the opening degree of the electric valve 9 is determined at the position where the real-time flow rate of the flow sensor 4 and the search flow rate of the electric valve 9 are close, the control box 10 is determined. All in the storage unit 25 And the flow rate sensing the hot water distribution system, characterized in that the flow control to the normal operation proceeds then ends the initial setting.

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