KR100557506B1 - Valve for regulating flux automatically and heating-system using the same - Google Patents

Abstract

The present invention is a valve for opening and closing the flow path, the hollow body-shaped flow path tube in which the inlet and outlet are formed at both ends in the flow path direction and the opening and closing jaw is formed between the inlet and the outlet, a motor for generating a rotational force, and a reciprocating motion An opening and closing means for opening and closing the opening and closing jaw, a cam for reciprocating the opening and closing means by applying the rotational force of the motor, a sensing unit for detecting the rotation angle of the cam and outputting a cam rotation angle signal, and an operation signal input from the outside; It is configured to include a control unit for controlling the operation of the motor by receiving the cam rotation angle signal from the sensing unit, it can automatically open and close the flow path according to the user's selection, and the flow rate is automatically adjusted according to the temperature of the fluid flowing along the flow path It provides flow control valve and heating system that can control and control the temperature of each room individually.

Heating, flow, regulation, actuator, cam

Description

Valve for regulating flux automatically and heating-system using the same}

Figure 1a is a cross-sectional configuration of the hot water discharge of the conventional hot water temperature control valve for heating.

FIG. 1B is a cross-sectional view of a state in which the thermo actuator is moved downward so that the flow path is closed in the state of FIG. 1A.

2 is a cross-sectional view of the flow control valve according to the present invention.

Figure 3 is an exploded perspective view showing a coupling structure of the cam applied to the present invention.

4A and 4B illustrate a shape in which the valve stem is moved downward in the state of FIG. 2 to close the opening and closing jaw.

 5A and 5B illustrate a shape in which the opening and closing jaw is closed by the protrusion of the moving rod in the state of FIG. 2.

6A and 6B illustrate a shape in which the valve stem is moved downward in the state of FIG. 4B.

7 is a configuration diagram of a heating system according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: valve 102: O-ring

110: euro tube 111: upper opening jaw

112: lower opening jaw 120: lower cap

130: upper cap 200: motor

210: motor shaft 300: thermo actuator

310: body 320: packing

330: moving rod 410: first elastic body

420: second elastic body 430: rod cap

500: cam 510: cam plate

520: camshaft 530: needle bearing

540: valve stem 600: detection unit

610: magnet 620: detection sensor

The present invention relates to a valve for automatically adjusting the flow rate of hot water and a heating system using the same, and more particularly, a flow rate control valve configured to automatically adjust the flow rate of the hot water and open and close the flow path even if the user does not directly operate it. And, it relates to a heating system configured to be remotely controlled using such a flow control valve.

In general, the heating system for controlling the indoor temperature is roughly divided into the room temperature detection method and the return temperature detection method according to the temperature detection method.

The former senses the indoor temperature and adjusts the heating hot water circulation to maintain the indoor temperature.Therefore, the controller is indoors, so the basic structure is suitable for maintaining the indoor temperature appropriately and is convenient for operation. If the sensor is installed in the representative room, it is difficult to maintain the overall temperature because the temperature distortion of the other room is large, and the reaction time is very slow until the temperature change after changing the circulation of hot water in the ondol structure. . In addition, only the on-off control method is usefully utilized.

On the other hand, the latter detects the return temperature, so the control response to the change in the floor temperature is fast, the temperature amplitude is very small, and it is controlled by sensing the combined return temperature of each room. There is a suitable advantage, and there is a trend in commercialization in recent years.

However, the valve used in such a return temperature sensing method has a problem in that it has no problem of using its own hot water locking valve due to its own locking function. Not only does the temperature measurement not be accurate, but the actuator structure used for blocking or releasing the valve packing is combined with the valve, which makes the coupling structure complicated and difficult to repair. there was.

In order to solve such a problem, the 'hot water temperature control valve for heating (application number: 20-2003-0034685)' configured to control the flow rate by directly measuring the temperature of the hot water, and to open and close the flow path according to the user's selection is the present invention. It was filed by the applicant of.

Hereinafter, a conventional hot water temperature control valve for heating will be described with reference to the accompanying drawings.

Figure 1a is a cross-sectional configuration of the hot water discharge of the conventional hot water temperature control valve for heating.

As shown in Figure 1a, the valve body 10 of the conventional heating hot water temperature control valve is formed with an inlet (I) on one side and the outlet (O) on the other side, according to the hot water flow direction, According to the operation of the coupling groove 11 for mounting the snap ring 61, the upper cap 50 and the female threaded portion 12a for screwing, and the thermo actuator 30 which is the opening and closing means of the hot water control valve, Opening and closing adjustment jaw (13a) (13b) to control whether the opening and closing, the hollow body is formed in the center of the female screw portion (12b) sequentially screwed with the male screw 24 of the lower cap (22). The lower cap 22 is screwed into the female threaded portion 12b of the valve body 10 as described above, and the lower cap 22 has an insertion groove 25 in which an O-ring 21a is placed. Is formed, there is formed a space in which the lower spring 23 can be interpolated. Therefore, after placing the lower spring 23 into the lower cap 22, the O-ring 21a is inserted into the insertion groove 25 to screw the lower cap 22 to the valve body 10. On the other hand, the thermo actuator 30 is configured to be embedded into the lower spring 23 is in contact with one end surface of the lower spring 23 so that the lower spring 23 can be located in the lower cap 22. Steps 33 are formed, and a screw part (not shown) is extended and formed on the top of the step 33, and the end thereof is movable up and down in accordance with the expansion or contraction of the thermal sensing expansion part of the thermo actuator 30. It can be seen that it is composed of a moving rod (31). The nut 42 is screwed to the thermo actuator 30 together with the packing member 41, and has a structure 43 having a wider outer diameter than the packing member 41 coupled together. Screwed to the thermo-actuator 30 in a form surrounding the top of the bar, the cap-shaped housing 44 is located on one end of the movable rod 31, the housing 44 is the top spring 45 ) Is used as a means to settle, an insertion groove 52 for mounting the O-ring 21b at the lower end is formed, and a threaded part 51 is formed at the side, so that the upper female thread part of the valve body 10 is formed ( It consists of a configuration of the upper cap 50 is screwed to 12a).

FIG. 1B is a cross-sectional view of a state in which the thermo actuator is moved downward so that the flow path is closed in the state of FIG. 1A.

When the user wants to completely block the flow path of hot water, the upper portion of the upper end of the valve body 10 is coupled to the packing member 41 to the state that can be in contact with the opening and closing adjustment jaw (13a) (13b) The cap 50 is rotated to the inside of the valve body 10 by a screw tightening mechanism, for example, a driver. As such, when the packing member 41 is kept in contact with the opening / closing adjustment jaw 13a and 13b, the conventional heating hot water temperature control valve may also serve as a lock valve to completely block the flow of hot water. Is configured to.

However, the conventional heating hot water temperature control valve has a disadvantage in that it is inconvenient to use because the user must manually tighten the upper cap 50 of each valve in order to completely block the flow of hot water.

In particular, in the current trend in which home automation is commercialized, a flow control valve configured to automatically open and close a flow path according to a user's selection, and a necessity of a heating system using the flow control valve is further increased. It is emerging.

The present invention has been made to solve the above problems, and the flow control valve is configured to automatically open and close the flow path according to the user's selection and to automatically control the flow rate according to the temperature of the fluid flowing along the flow path and It is an object of the present invention to provide a heating system using such a flow control valve.

The flow control valve according to the present invention for achieving the above object is a valve for opening and closing the flow path, the inlet and outlet are formed at both ends in the flow path direction, the hollow body shape of the opening and closing jaw is formed between the inlet and the outlet A flow pipe; A motor for generating a rotational force; Opening and closing means for opening and closing the opening and closing jaw through a reciprocating motion; A cam for reciprocating the opening and closing means by receiving the rotational force of the motor; A sensing unit which detects a rotation angle of the cam and outputs a cam rotation angle signal; It is configured to include a control unit for controlling the operation of the motor by receiving the operation signal input from the outside and the cam rotation angle signal from the sensing unit.

The sensing unit includes one or more magnets coupled to one side of the cam so as to be spaced apart from the rotating shaft by one side, and one or more sensing sensors coupled to the cam so as to be spaced apart from each other by the cam to sense magnetic force of the magnet.

The sensor detects the magnet position according to whether the flow path is opened, and outputs a cam rotation angle signal including information about how much the cam is rotated, and the controller controls the flow path of the flow path according to an input signal input from the outside. The operation of the motor is controlled to be fully open or fully closed or partially open.

The opening and closing means is a thermocouple including a body coupled to the structure capable of reciprocating movement, a packing for opening and closing the opening and closing jaw through the reciprocating movement of the body, and a moving rod coupled to one side of the body and changing the protrusion distance according to the temperature of the fluid. An actuator; A first elastic body for applying an elastic force to the thermo actuator in a direction in which the packing opens and closes the jaw; It is formed to have an elastic modulus larger than that of the first elastic body, and is coupled in a structure capable of reciprocating by a cam, and an elastic force is applied to the moving rod so that the packing closes the opening and closing jaw when the moving rod protrudes or the cam rotates to close the flow path. It is comprised including the 2nd elastic body to apply.

At this time, the cam is additionally coupled to the annular ring of the needle bearing or a material of low friction force to the contact with the opening and closing means when rotating.

In addition, the heating system according to the present invention, in the heating system for controlling the heating temperature of each room by detecting the hot water temperature returned to the return pipe through the water supply pipe of the boiler, the structure that can operate independently without an external power source according to the hot water temperature A valve installed in each room to open the hot water flow path at or below the set temperature, and close the hot water flow path at or above the set temperature; A valve actuator coupled to each valve to control the operation of the valve to regulate the temperature at which the valve opens and closes the flow path; A temperature controller which receives a set temperature of each room from the outside and outputs a set temperature signal of each room; A valve controller which receives a set temperature signal output from the temperature controller and controls an operation of each valve actuator; It consists of a flow sensor that detects the flow of hot water in the return pipe to stop the operation of the boiler if the flow of hot water for more than a certain time.

The valve includes a hollow flow path tube having inlets and outlets formed at both ends in a flow path direction, and opening and closing jaws formed between the inlets and outlets; A thermo actuator comprising a body coupled to the structure capable of reciprocating movement, a packing for opening and closing the opening and closing jaw through the reciprocating movement of the body, and a moving rod coupled to one side of the body and having a protrusion distance changed according to the temperature of the fluid; A first elastic body for applying an elastic force to the thermo actuator in a direction in which the packing opens and closes the jaw; It is formed to have an elastic modulus larger than that of the first elastic body, and is coupled in a structure capable of reciprocating by a cam, and an elastic force is applied to the moving rod so that the packing closes the opening and closing jaw when the moving rod protrudes or the cam rotates to close the flow path. It is comprised including the 2nd elastic body to apply.

The valve actuator includes a motor for generating a rotational force; A cam for reciprocating the thermo actuator by the rotational force of the motor, a sensing unit for detecting the cam rotation angle and outputting the cam rotation angle signal, a motion signal input from the outside and a cam rotation angle signal from the sensing unit It is configured to include a control unit for controlling the operation of the motor.

Therefore, using the heating system according to the present invention, it is possible to adjust the temperature of each room without measuring the water temperature using a separate water temperature detection sensor.

Hereinafter, an embodiment of a flow control valve and a heating system according to the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view of the flow control valve according to the present invention.

As shown in Figure 2, the flow control valve according to the present invention, the flow path is formed in the horizontal direction therein, the opening and closing jaw (111, 112) for opening and closing the flow path is formed in the flow path interruption and the opening and closing jaw (111, 112) Hollow body-shaped flow path tube 110, the opening is formed in the upper and lower portions of the formed portion, the upper cap 130 and the lower cap 120 are respectively coupled to the upper and lower openings of the flow path tube 110 Valves 100 coupled to each other; A motor 200 generating a rotational force; Thermo actuator 300 for opening and closing the opening and closing jaw (111, 112) through a reciprocating motion; A cam 500 for reciprocating the thermo actuator 300 by receiving the rotational force of the motor 200; A sensing unit 600 for detecting a rotation angle of the cam 500 and outputting a cam rotation angle signal; It is configured to include a controller (not shown) for controlling the operation of the motor by receiving the operation signal input from the outside and the cam rotation angle signal from the sensing unit 600.

Opening and closing jaw (111, 112) is formed so that the flow path of the fluid flowing into the flow path tube 110 in the vertical direction, it is divided into the upper opening and closing jaw 111 and the lower opening and closing jaw (112). At this time, the upper opening and closing jaw 111 is formed to serve as an inlet of the opening and closing portion, the lower opening and closing jaw 112 is formed so that the passage is narrower than the upper opening and closing jaw (111).

The lower cap 120 and the upper cap 130 are coupled to the opening of the flow path tube 110 by a screw coupling structure, and the leakage of the fluid flowing into the flow path tube 110 into a portion coupled to the flow path tube 110. O-rings 102 are coupled to each other to prevent them.

Thermo actuator 300, the body 310 is inserted into the opening and closing jaw (111, 112) coupled to the structure capable of reciprocating movement, and the opening and closing jaw (111, 112) through the reciprocating motion of the body (310) It is configured to include a packing 320 for opening and closing, and a moving rod 330 coupled to one side of the body 310 and the protrusion distance is changed according to the temperature of the fluid.

In addition, the flow control valve according to the present invention includes a first elastic body 410 for applying an elastic force to the body 310 in the direction in which the packing 320 opens and closes the opening and closing jaw (111, 112); It is formed to have a larger elastic modulus than the first elastic body 410, coupled to the structure capable of reciprocating by the cam 500, the movable rod 330 protrudes or the cam 500 rotates for closing the flow path The packing 320 further includes a second elastic body 420 that applies an elastic force to the moving rod 330 to close the opening and closing jaw. At this time, the lower end of the second elastic body 420 and the moving rod 330 between the second elastic body 420 and the moving rod 330 so that the elastic force of the second elastic body 420 can be transmitted to the moving rod 330. The rod cap 430 of the shape capable of simultaneous contact with the upper end of the) is coupled.

In the present embodiment, the first elastic body 410 and the second elastic body 420 are applied as a coil spring, but the type of the first elastic body 410 and the second elastic body 420 is not limited thereto. If the structure can be applied to the elastic force can be changed to a leaf spring or other elastic material.

The cam 500 is a disc-shaped cam plate 510 coupled to the motor shaft 210 of the motor 200 to rotate, a cam shaft 520 protruding along the rotation axis of the cam plate 510, and a cam plate 510. It is configured to include a valve stem 540 to reciprocate in the vertical direction by the rotation of the second elastic body 420 to compress and relax. Each sub coupling structure of the cam 500 will be described in detail with reference to the separate drawings.

The sensing unit 600 is coupled to one side of the cam plate 510 at a point spaced apart from the rotational axis of the cam 500 by a magnet 610 and the cam plate 510 so as to be spaced apart by a predetermined distance of the magnet 610. It is configured to include a detection sensor 620 for detecting a magnetic force. At this time, the magnet 610 is coupled to one side of the cam plate 510 of the point corresponding to the sensor 620 when the cam plate 510 is rotated so that the valve stem 540 is located at the uppermost point, the control unit is in this state It is determined that the flow path is completely open.

The sensor 620 detects the position of the magnet 610 and outputs a cam rotation angle signal indicating how much the cam plate 510 is rotated, and the controller receives the cam rotation angle signal to completely open or close the flow path. Alternatively, in order to partially open, it is determined how much the cam plate 510 should be rotated to control the operation of the motor 200. In addition, a plurality of detection sensors 620 applied to the present invention may be mounted along the movement path of the magnet 610 so as to more accurately detect the rotation angle of the cam plate 510.

As described above, since the sensing unit 600 that determines the position of a specific component using magnetic force is already commercialized for various purposes, a detailed description thereof will be omitted.

In addition, the controller sets the maximum opening area of the flow path differently according to the temperature setting signal input by the user. That is, when the user inputs the temperature setting signal by increasing the desired temperature, the controller controls the operation of the motor 200 to widen the maximum opening area of the flow path, and when the user inputs the temperature setting signal by lowering the desired temperature, the controller The operation of the motor 200 is controlled to narrow the maximum opening area of the flow path.

Figure 3 is an exploded perspective view showing a coupling structure of the cam applied to the present invention.

As shown in FIG. 3, the valve stem 540 is coupled to the camshaft 520 at a right angle, and reduces frictional force with the valve stem 540 on the outer circumferential surface of the cam plate 510 in contact with the valve stem 540. The needle bearing 530 is further coupled for the purpose.

The needle bearing 530 is coupled to a plurality of needle rollers 532 having a rotation axis parallel to the cam shaft 520 on the inner surface of the needle bearing 530 which is in contact with the outer circumferential surface of the cam plate 510, thereby significantly reducing frictional force with the cam plate 510. At the same time, even if the cam plate 510 rotates, the rotary motion is not performed. Therefore, the valve stem 540 is linearly moved without friction with the needle bearing 530.

At this time, in order to reduce the friction between the cam plate 510 and the valve stem 540 with a simpler structure, the needle bearing 530 is formed of a material having a small friction force and is annular ring fixed to the outer circumferential surface of the cam plate 510. It can be changed and applied.

When the annular ring is coupled to the outer circumferential surface of the cam plate 510, the annular ring also rotates according to the rotation of the cam plate 510, but friction occurs between the annular ring and the valve stem 540, but the annular ring itself has a small frictional force. Since the cam plate 510 and the valve stem 540 are directly contacted, the frictional resistance can be reduced compared to the case in which the cam plate 510 is directly contacted. In addition, when the annular ring is coupled to the outer circumferential surface of the cam plate 510 as described above, the cam plate 510 need not necessarily be limited to a disc shape, and may be changed to a general elliptical flat plate shape.

FIG. 4A illustrates a shape in which the valve stem is moved downward in the state of FIG. 2 to close the opening and closing jaw, and FIG. 4B illustrates a left side shape of FIG. 4A.

As shown in FIG. 2, when the magnet 610 is located at a point facing the detection sensor 620, the detection sensor 620 detects that the magnet 610 is positioned at the top, and the detection unit 600 is It is determined that the valve stem 540 is located at the top.

In this state, when the input signal for the complete closing of the flow path is transmitted to the control unit, the control unit drives the motor 200 to rotate the cam plate 510 180 °, and thus the packing 320 is shown in FIG. 4A. It is in close contact with the opening and closing jaws 111 and 112. Since the packing 320 is in close contact with the opening and closing jaws 111 and 112, the flow path in the flow path pipe 110 is completely closed.

 5A illustrates a shape in which the opening and closing jaw is closed by the protrusion of the movable rod in the state of FIG. 2, and FIG. 5B illustrates the left side shape of FIG. 5A.

When the temperature of the hot water flowing into the flow pipe 110 in the state shown in FIG. 2 increases and the thermo actuator 300 is operated, the moving rod 330 protrudes upward as shown in FIGS. 5A and 5B. .

At this time, since the second elastic body 420 is set to have a larger elastic modulus than the first elastic body 410, the body 310 moves downwardly in a direction in which the first elastic body 410 is compressed, that is, the opening and closing jaw 111. , 112 is sealed by the packing 320.

Since the operation of the thermo actuator 300 applied to the present invention is the same as the operation of the thermo actuator applied to the warm water temperature control valve for the heating mentioned in the prior art, a detailed description thereof will be omitted.

6A and 6B show a shape in which the valve stem is moved downward in the state of FIGS. 5A and 5B.

In the state of FIGS. 5A and 5B, when an input signal for completely closing the flow path is transmitted to the controller, the controller drives the motor 200 to rotate the cam plate 510 180 ° like in the case of FIGS. 4A and 4B. Accordingly, the valve stem 540 moves downward.

However, since the thermo actuator 300 is already moved downward so that the packing 320 is in close contact with the opening and closing jaws 111 and 112, the thermo actuator 300 is no longer moved and is shown in FIG. 4C. 2 elastic body 420 is compressed.

Therefore, the valve 100 and the thermo actuator 300 are not damaged even if the input signal for the complete closure of the flow path is input in the state where the opening and closing jaws 111 and 112 are closed by the operation of the thermo actuator 300. .

7 is a configuration diagram of a heating system according to the present invention.

As shown in FIG. 7, the heating system according to the present invention includes a boiler A10 for heating water to generate hot water at high temperature, a boiler controller A16 for driving the boiler A10, and a boiler A10. Water supply pipe (A12) for supplying the hot water discharged from each room (A20), return pipe (A14) for returning the water of which temperature is reduced while turning each room (A20) to the boiler (A10), and hot water Valves A30 and A30, which are installed in each room (A20) and can be operated independently without external power according to the temperature, open the hot water flow path below the set temperature and close the hot water flow path above the set temperature. The valve actuator A40 is coupled to each valve A30 to control the temperature of opening and closing the flow path and controls the operation of the valve A30, and receives the set temperature of each room from the outside to receive the set temperature signal of each room. Output temperature controller (A50), The valve controller A60 controls the operation of each valve actuator A40 by receiving the set temperature signal output from the temperature controller A50, and the hot water flow of the return pipe A12 is sensed to detect the flow of hot water for a predetermined time. If not detected is configured to include a flow sensor (70) for stopping the operation of the boiler (A10).

At this time, since the operation structure of the valve A30 and the valve actuator A40 to which the heating system according to the present invention is applied is the same as the operation structure of the flow regulating valve according to the present invention, a detailed description thereof will be omitted.

When the user operates the temperature controller A50 and outputs a set temperature signal for each room, the valve controller A60 receives this set temperature signal to individually control the valve actuator A40 for each room. That is, the valve actuator A40 in the room where the set temperature signal is set to low operates the valve A30 so that the flow rate of hot water decreases, and the valve actuator A40 in the room in which the set temperature signal is set high increases the flow rate of the hot water. A30) is operated.

In addition, the temperature controller A50 is integrally formed with a temperature controller A16 for controlling the operation of the boiler A10. Therefore, the user operates the boiler A10 only by operating the temperature controller A50 even if the user does not directly lock or open the hot water valve of each room A20 at the same time. It can be heated to temperature.

In addition, the temperature controller (A50) of such a system can be configured to enable remote control, it is possible to implement a more complete home automation.

In addition, the heating system according to the present invention is to prevent overheating of the boiler (A10) by stopping the operation of the boiler (A10) when the return pipe (A12) is clogged or leaks, or other devices are broken. It is composed.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to a specific embodiment and should be interpreted by the attached claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

By using the flow control valve and the heating system according to the present invention, it is possible to open and close the flow path automatically according to the user's selection, it is possible to automatically control the flow rate in accordance with the temperature of the fluid flowing along the flow path, the temperature of each room The advantage is that they can be adjusted individually.

Claims (12)

A hollow flow path tube 110 having inlets and outlets formed at both ends in a flow path direction, and opening and closing jaws 111 and 112 formed between the inlets and outlets; A motor 200 generating a rotational force; Opening and closing means for opening and closing the opening and closing jaw (111, 112) through a reciprocating motion; A cam 500 for reciprocating the opening and closing means by receiving the rotational force of the motor 200; A sensing unit 600 for sensing a rotation angle of the cam 500 and outputting a cam rotation angle signal; A controller configured to control an operation of the motor 200 by receiving an operation signal input from an external device and a cam rotation angle signal from the detection unit 600; Flow control valve characterized in that comprises a The method of claim 1, The detection unit 600, At least one magnet 610 coupled to one side of the cam 500 so as to be spaced apart from the rotating shaft by a predetermined distance; One or more detection sensors 620 coupled to the cam 500 to be spaced apart from each other by a predetermined distance to detect magnetic force of the magnet 610; Flow control valve characterized in that comprises a The method of claim 2, The detection sensor 620, Detecting the position of the magnet 610 according to whether the flow path is opened and outputting different cam rotation angle signals; The control unit, Flow control valve, characterized in that for controlling the operation of the motor 200 to be completely open or completely closed or partially open according to the input signal input from the outside. The method according to any one of claims 1 to 3, The opening and closing means, Body 310 is coupled to the structure capable of reciprocating, the packing 320 for opening and closing the opening and closing jaw (111, 112) through the reciprocating motion of the body 310, and is coupled to one side of the body 310 A thermo actuator 300 including a moving rod 330 whose projection distance is changed according to the temperature of the fluid; A first elastic body 410 for applying an elastic force to the thermo actuator 300 in a direction in which the packing 320 opens the opening and closing jaws 111 and 112; It is formed to have a larger elastic modulus than the first elastic body 410, coupled to the structure capable of reciprocating by the cam 500, the moving rod 330 protrudes or the cam 500 for the passage closed A second elastic body 420 for applying an elastic force to the moving rod 330 so that the packing 320 closes the opening and closing jaws 111 and 112 when the rotation is performed; Flow control valve characterized in that comprises a. The method according to any one of claims 1 to 3, The control unit, Flow control valve, characterized in that for setting the maximum opening area of the flow path in accordance with the temperature setting signal input from the outside. The method according to any one of claims 1 to 3, The cam 500 is, It is formed in the shape of a disk, the flow rate control valve, characterized in that the needle bearing 530 is further coupled to the portion in contact with the opening and closing means when rotating. The method according to any one of claims 1 to 3, The cam 500 is, Flow control valve, characterized in that the annular ring of low friction material is further coupled to the contact with the opening and closing means when rotating. In the heating system for controlling the heating temperature of each room by detecting the hot water temperature returned to the return pipe (A14) through the water supply pipe (A12) of the boiler (A10), A valve A30 installed in each room A20 in a structure that can be operated independently without an external power source according to the hot water temperature, opening the hot water flow path at or below the set temperature, and closing the hot water flow path at or above the set temperature; A valve actuator (A40) coupled to each (A30) valve for controlling the temperature at which the valve (A30) opens and closes the flow path and controls the operation of the valve (A30); A temperature controller A50 for receiving a set temperature of each room from the outside and outputting a set temperature signal of each room; A valve controller (A60) which receives a set temperature signal output from the temperature controller (A50) and controls the operation of each valve actuator (A40); Heating system, characterized in that configured to include. The method of claim 8, The valve A30, A hollow flow path tube 110 having inlets and outlets formed at both ends in a flow path direction, and opening and closing jaws 111 and 112 formed between the inlets and outlets; Body 310 is coupled to the structure capable of reciprocating, the packing 320 for opening and closing the opening and closing jaw (111, 112) through the reciprocating motion of the body 310, and is coupled to one side of the body 310 A thermo actuator 300 including a moving rod 330 whose projection distance is changed according to the temperature of the fluid; A first elastic body 410 for applying an elastic force to the thermo actuator 300 in a direction in which the packing 320 opens the opening and closing jaws 111 and 112; It is formed to have a larger elastic modulus than the first elastic body 410, coupled to the structure capable of reciprocating by the cam 500, the moving rod 330 protrudes or the cam 500 for the passage closed A second elastic body 420 for applying an elastic force to the moving rod 330 so that the packing 320 closes the opening and closing jaws 111 and 112 when the rotation is performed; Heating system, characterized in that configured to include. The method of claim 9, The valve actuator A40 is, A motor 200 generating a rotational force; A cam 500 for reciprocating the thermo actuator 300 by receiving the rotational force of the motor 200; A sensing unit 600 for sensing a rotation angle of the cam 500 and outputting a cam rotation angle signal; A controller configured to control an operation of the motor 200 by receiving an operation signal input from an external device and a cam rotation angle signal from a detection unit; Heating system, characterized in that configured to include. The method according to any one of claims 8 to 10, The temperature controller A50, Heating system, characterized in that integrated with the temperature controller (A16) for controlling the operation of the boiler (A10). The method according to any one of claims 8 to 10, By detecting the hot water flow of the return pipe (A12), if the flow of hot water for more than a predetermined time is characterized in that it further comprises a flow sensor (70) for stopping the operation of the boiler (A10) system.

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