KR100541825B1 - Control method of 3-way valve for boiler - Google Patents

Abstract

The present invention relates to a control method of a three-way flow path switching valve for a boiler, the object of which is the water hammering occurred in the conventional three-way flow path switching valve according to the opening and closing operation by the suction force and the weight of gravity of the solenoid ) Can be completely prevented. The present invention for achieving this object is an inlet port to which the pumped water is introduced from the circulation pump of the boiler, the first and second discharge port through which the water introduced through the inlet port is discharged, and the first and second For a boiler having a valve member for selectively communicating with any one of the discharge port and the solenoid for changing the communication flow path by generating an electromagnetic force by applying the output signal of the microcomputer and moving the valve member up and down In the three-way flow path switching valve, the three-way flow path switching valve for the boiler is applied to the output signal of the microcomputer and the driving of the pump is stopped, the pressure of the solenoid and the driving force of the solenoid in the state of the same pressure Switching the flow path by the force only characterized in that the control without water hammering when switching the mode of the boiler Preventing water hammer ring (Water Hammering) generated by the three-way flow-route switching valve which changes flow passage through the rotating force of the motor box and, at the same time, there is an effect that it is possible to reduce power consumption.

Description

 CONTROL METHOD OF 3-WAY VALVE FOR BOILER}

1 is a system schematic diagram of a boiler to which a three-way flow path switching valve of the present invention is applied.

Figure 2 is a cross-sectional view showing the internal structure of the three-way flow path switching valve of FIG.

Figure 3 is a block diagram of a control means for controlling the operation of the boiler is configured with a three-way flow path switching valve according to the present invention.

4 and 5 are views showing the operating state of the three-way flow path switching valve for the boiler according to the present invention.

Figure 6 is a flow chart of the operation of the three-way flow path switching valve when the boiler is operated in the heating mode in the stopped state.

Figure 7 is a flow chart of the operation of the three-way flow path switching valve when the heating mode operation of the boiler of Figure 6 ends.

8 is a flow chart of the operation of the three-way flow path switching valve when the boiler is operated in the hot water mode in the stopped state and the end of the hot water operation.

Fig. 9 is a flow chart of a three-way flow path switching valve at the time of hot water operation and hot water termination in a boiler heating / hot water simultaneous mode;

Explanation of symbols on main parts of drawing

10 .. Water Tank 12 .. Pump

14 .. Main heat exchanger 17 .. Hot water heat exchanger

20. Flow switch 100. Three-way flow valve

111 .. Inlet 112.113. Outlet

120. valve element 130. armature rod

140. Solenoid assembly 200. Control means (control panel)

210 .. Power supply 220 .. Microcomputer

240 .. Heating, hot water switch 250 .. Hot water switch

The present invention relates to a control method of a three-way flow path switching valve for a boiler, and more particularly, to a three-way flow path switching valve for a boiler capable of preventing water hammering by operating a flow path switching member through a solenoid. It relates to a control method.

In general, a boiler is divided into a heating conduit for heating water by burning fuel and heating while the heated water circulates through a predetermined heating zone, and a hot water conduit for tapping hot water. Heating water is circulated in the heating pipe by the operation of the circulation pump. At this time, the heating water is heated in the main heat exchanger through a burner in the circulation process and is supplied to the three-way flow path switching valve side, and the heating water passing through the three-way flow path switching valve performs a substantial heating function while passing through the heating coil. Return through return piping. In addition, the hot water pipe is configured so that the direct water (tap water) flowing through the hot water pipe passes through the inside of the hot water heat exchanger.

One of the components of the conventional boiler, the three-way flow path switching valve is a drive shaft directly connected to the motor rotates the switching member according to the switch signal, and thus the outlet port is selectively opened and closed, according to the rotational force of the motor from the hot water to the heating Or there is a lot of power consumption as it is operated in a manner that is switched from heating to hot water.

In addition, the conventional three-way flow path switching valve has a problem that a pressure difference occurs according to the operation of the pump, thereby causing a water hammering (Water Hammering) phenomenon.

In addition, the conventional three-way flow path switching valve operates without stopping the pump, but it takes time to switch from heating to hot water according to the use of gears, and at least two drive relays are used so that power consumption applied to these drive relays is large. There is.

Accordingly, the object of the present invention is to solve such a problem, the object of the present invention is to operate the water mode by switching only the suction power and gravity force of the solenoid mode was switched to hot water ↔ heating through the rotational force of the water (water The present invention provides a control method of a three-way flow path switching valve for a boiler that can completely prevent hammering and reduce power consumption.

The present invention for achieving this object is;

An inlet port into which pumped water flows from a circulation pump of a boiler, first and second discharge ports through which water introduced through the inlet port is discharged, and one of the first and second discharge ports and the inlet port In the three-way flow path switching valve for a boiler having a valve member for selectively communicating with a solenoid for generating an electromagnetic force by receiving the output signal of the microcomputer and moving the valve member up and down to change the communication flow path,

The three-way flow path switching valve for the boiler receives the output signal of the microcomputer and when the driving of the pump is stopped, the flow path is switched only by the driving force of the solenoid and the force of gravity while the pressure of the inlet and the outlet is the same. When the mode of the boiler is characterized in that the control without water hammering.

With reference to the accompanying drawings, a three-way flow path switching valve for a boiler according to the present invention will be understood by the embodiments described in detail below.

As shown in the schematic diagram of the boiler system shown in FIG. 1, a boiler system to which a three-way flow path switching valve is applied, burns fuel to heat water supplied from the water tank 10, while heated water circulates through a predetermined heating zone. It is divided into the heating pipe path 19 which performs heating, and the hot water pipe path 16 which taps hot water. At this time, the heating water is heated in the main heat exchanger 14 through a burner (not shown) in the circulation process and is supplied to the three-way flow path switching valve 100, the heating water passing through the three-way flow path switching valve 100 is a heating coil ( 18) while performing a substantial heating function and continues to return through the return pipe (11). And inside the hot water heat exchanger 17 is configured to direct water (tap water) flowing through the hot water pipe (15) via the inside of the hot water heat exchanger (17).

Referring to the cross-sectional view showing the internal structure of the three-way flow path switching valve of Figure 2, the three-way flow path switching valve 100 is installed in the hot water and heating conduits such as boilers to change the flow direction of heating or hot water, inlet port 111 and the first and second discharge ports 112 and 113 are formed to face up and down, and are linearly movable up and down in the flow path switching chamber 114 for communicating them with each other. A valve member 120 for selectively communicating with any one of the two discharge ports 112 and 113 and the inflow port 111, and the first discharge port formed on the upper side for operating the valve member 120 ( The armature rod 30 connected to the valve member 120 in a straight line through 112 and the solenoid assembly disposed above the valve housing 10 to move the armature rod 130 upward in accordance with an electrical signal. Equipped with 140.

The valve housing 110 has a flow path switching chamber 114 in which fluid can be moved therein, and an inflow port 111 through which fluid is introduced is provided at a side of the flow path switching chamber 114, and the flow path switching chamber 114 is provided. The first discharge port 112 and the second discharge port 113 are provided to face each other so that the fluid flows out of the upper and lower sides of the upper and lower sides.

In addition, a guide partition wall 115 is installed in the flow path switching chamber 114 to guide the vertical movement of the valve member 120 on the side opposite to the inflow port 111. The guide partition wall 115 is formed integrally with the valve housing 110, and upper and lower communication passages 116 and 117 are formed at upper and lower portions thereof so as to communicate with upper and lower spaces of the flow path switching chamber 114. Accordingly, the valve member 120 may facilitate the vertical movement of the valve member 120 through the guide partition wall 115, and the fluid flowing through the inlet port 111 may be the first discharge port 112 or the second discharge port. Direct to the port 113 side.

Meanwhile, the solenoid assembly 140 includes a sleeve 141 having an upper end of the armature rod 130 vertically movable up and down, and is arranged to surround the outside of the sleeve 141 and is applied by an electromagnetic force applied from the outside. The coil for operating 130 includes a solenoid 143 wound thereon.

Referring to the configuration of the control means (control panel) of Figure 3, the control means 200 is provided for the control of the boiler consisting of a three-way flow path switching valve is converted to a predetermined DC voltage by receiving a normal AC power 220V The power supply unit 210 to input the power, the power switch 230 for applying power to the control means 200, and the driving power supplied through the power switch 230 to operate the pump 12. Whether the power is supplied (applied or cut off) to the solenoid 143 of the solenoid assembly 140 of the three-way flow path switching valve 100 and the output signals of various switches 240, 250 and 20 to be described later are applied to the boiler. A microcomputer 220 for outputting a control signal to a corresponding part of the control unit, a heating / hot water switch 240 for applying a control signal to the microcomputer 220, a hot water switch 250, and a fluid amount of the water pipe 15. Flow switch 260 for detecting the, when the boiler is operating in heating mode And heat with temperature controller 270 to set the desired temperature at the option of the user, a memory 290 and a timer 280 for storing a program set up in the microprocessor 220.

4 and 5, the operation of the three-way flow path switching valve will be briefly described.

First, in FIG. 4, the second discharge port 113 below the flow path switching chamber 114 is closed while the power is not applied to the solenoid 143 of the solenoid assembly 140, while the inlet port 111 and the inlet port 111 are closed. In the state in which the first discharge port 112 is in communication with each other, this time corresponds to the hot water mode to be described below in detail. In this state, when the circulation pump 12 is driven, the fluid flows into the flow path switching chamber 114 through the inflow port 111 and then continues through the first discharge port 112. At this time, the static pressure is applied to the valve member 120 while the fluid is directly guided to the first discharge port 112 side, and thus the valve member 120 is in close contact with the second discharge port 113. To keep it closed.

And, as shown in FIG. 5, when the power is applied to the solenoid 143 to drive the solenoid assembly 140 to change the flow of the fluid, first, the user controls the control unit (control panel) 200 (FIG. 3), when the driving of the circulation pump 12 is stopped and power is applied to the solenoid 143 while the pressure is constant on the upper and lower sides of the valve member 120, the first discharge port ( 112 is closed while the inlet port 111 and the second outlet port 113 are in communication with each other.

In this state, when the circulation pump 12 is driven, the fluid flows into the flow path switching chamber 114 through the inflow port 111 and continues to exit through the second discharge port 113 (arrow of FIG. 5). In this case, the fluid is directly guided to the second discharge port 113 side, so that the positive pressure acts on the valve member 120 side, which causes the valve member 120 to close the first discharge port 112 more closely. Will remain in the state.

Hereinafter, a detailed operation of the three-way flow path switching valve of the present invention and the effects thereof will be described with reference to FIGS. 3 to 9.

When the boiler is not supplied with power, the three-way flow path switching valve 100 maintains the stop state as shown in FIG. 4. Thus, when the boiler is stopped 300, the inlet port 111 and the first discharge port 112 of the three-way flow path switching valve 100 is in a communication state 302, while the second discharge port 113 is closed. It is kept in a state. In this state, when the boiler heating operation is started 304 in a state in which the user sets a desired temperature through the heating temperature controller 270, a control signal of the microcomputer 220 starts to be output from this time.

First, the operation sequence (step) of the three-way flow path switching valve 100 during the heating operation in the boiler stop state will be described in detail below. (See the operation flow diagram of FIGS. 6 and 7).

The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the stop mode to the heating mode, the heating mode to the heating end mode

(S1) maintaining the inflow port 111 and the first discharge port 112 in communication;

(S2) when the user sets a key to the heating mode through the heating switch 240 from the step S1, the solenoid 143 receives power from the microcomputer 220;

(S3) power is supplied to the solenoid 143 through the step S2 and the pump 12 is driven after a predetermined delay time T1;

(S4) a step in which the pump 12 is driven through the step S3 and the power applied to the solenoid 143 is cut off after a predetermined delay time T1;

(S5) Although the power is cut off to the solenoid 143 through the step S4, the pressure P1 of the inlet port 111 is substantially the same as the pressure P3 of the second discharge port 113. Maintaining a pressure higher than the pressure (P2) of the discharge port 112, the first discharge port 112 is completely closed and the communication state of the inlet port 111 and the second discharge port 113 is maintained ; As described above, even when the power of the three-way flow path switching valve is cut off, the pressure, that is, P1? P3 > P5? P4? P2 and eventually P1 > As described above, the inflow port 111 and the second discharge port 113 are to maintain the communication state. For reference, in the claims, the pressure of the inlet port 111 is referred to as the pressure of the inlet end, and the pressure of the first and second outlet ports is collectively described as the pressure of the outlet end.)

(S6) when the heating operation of the boiler which was operated in the step (S5) is finished, the solenoid 143 is receiving power from the microcomputer 220;

(S7) power is supplied to the solenoid 143 through the step S6, and the power of the pump 12 is cut off after a predetermined delay time T1;

(S8) the power is cut off from the pump 12 through the step S7 and the power applied to the solenoid 143 is cut off after a predetermined delay time T2;

(S9) When power is cut off to the solenoid 143 through the step S8, the valve member 120 is moved downward by its own gravity (gravity) so that the second discharge port 113 is in a completely closed state. Maintained;

(S10) the second discharge port 113 is closed through the step (S9) and at the same time the heating mode is terminated in a state in which the inlet port 111 and the first discharge port 112 is in communication; It is made to include.

On the other hand, the delay time (T1) is set to 1-2 seconds, the delay time (T2) is set to 2-3 seconds.

Next, the operation sequence (step) of the three-way flow path switching valve will be described in detail when the boiler starts to operate the hot water for the first time while the boiler is stopped.

The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the stop mode to the hot water mode, the hot water mode to the end of the hot water mode

(S11) maintaining the second discharge port 113 in a closed state;

(S12) when the user enters the hot water mode by setting the key of the hot water switch 250 while maintaining the state of the step (S11), the pump 12 is pumped by receiving power from the microcomputer 220;

(S13) When power is applied to the pump 12 through the step (S12), the pressure (P1) of the inlet port 111 is substantially the same as the pressure (P2) of the first discharge port 112, the second discharge Forming a pressure higher than the pressure P3 of the port 113 to maintain the closed state of the second discharge port 113; As such, once power is applied to the pump 12, the pressure P, ie, P1 ≒ P2> P4 ≒ P5 ≒ P3 as shown in FIG. 1, becomes P1〉 P3 based on the second discharge port 113. ) Will be completely blocked.

(S14) the boiler that was operated in the step (S13) is a step of terminating the hot water operation by shutting off the power of the pump 12;

Next, the operation sequence of the three-way flow path switching valve when the boiler is switched to the hot water mode while operating in the heating mode will be described in detail.

The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the heating mode to the hot water mode, the hot water mode to the heating mode

(S15) the boiler is operated in the heating mode by the inflow port 111 and the second discharge port 113 are in communication with each other;

(S16) When the user's key (turns on the hot water switch 250) while operating in the heating mode of the step (S15) state or the hot water mode according to a predetermined program is set, the solenoid 143 is the microcomputer ( Receiving power from 220;

(S17) a step in which power is applied to the solenoid 220 through the step S16 and the power of the pump 12 is cut off after a predetermined delay time T3;

(S18) cutting off the power of the pump 12 through the step S17 and cutting off the power applied to the solenoid 143 after a predetermined delay time T3;

(S19) maintaining the communication state between the inlet port 111 and the first discharge port 112 even when power is cut off to the solenoid 143 through the step S18;

(S20) After the hot water mode is terminated according to the user's key setting (heating switch 240 is turned on) or a predetermined program after the above (S19), the heating mode is switched, and if the hot water mode is not finished, the above step And repeating the steps S16, S17, S18, and S19.

On the other hand, the delay time (T3) is set to 1-2 seconds. However, the above-described delay time T1 (T2) T3 is not limited to this embodiment and can be changed.

In this way, the opening and closing of the three-way flow path switching valve 100 after the predetermined delay time outputted through the microcomputer 220 before and after the pump 12 starts and stops, the driving force and the self-weight (gravity) of the solenoid 143 By using only the force of the conventional three-way flow path switching valve and the pump at the same time the pressure difference occurs (pressure difference between the inlet and outlet end) in the state of opening and closing of the three-way flow path switching valve is caused by this, water hammering ( Water Hammering can be completely prevented.

As described above, embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to one embodiment of the present invention.

As can be seen from the above description, the control method of the three-way flow path switching valve for a boiler according to the present invention operates the mode that the mode was switched to hot water ↔ heating through the rotational force of the conventional motor only by the suction force and the force of gravity of the solenoid. As a result, the water hammering phenomenon is completely prevented and power consumption is reduced.

Claims (6)

An inlet port into which pumped water flows from a circulation pump of a boiler, first and second discharge ports through which water introduced through the inlet port is discharged, and one of the first and second discharge ports and the inlet port In the three-way flow path switching valve for a boiler having a valve member for selectively communicating with a solenoid for generating an electromagnetic force by receiving the output signal of the microcomputer and moving the valve member up and down to change the communication flow path, The three-way flow path switching valve for the boiler When the driving of the pump is stopped by receiving the output signal of the microcomputer, the valve member is moved up and down by switching the flow path only by the driving force of the solenoid and the force of gravity while the pressure of the inlet end and the outlet end is the same to switch the mode of the boiler. Control method of the three-way flow path switching valve for the boiler, characterized in that the control without water hammering when switching. The method of claim 1, The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the stop mode to the heating mode, the heating mode to the heating end mode (S1) maintaining the inflow port and the first discharge port in communication; (S2) when the user sets a key to a heating mode from the step (S1), the solenoid receives power from the microcomputer; (S3) applying power to the solenoid through the step (S2) and driving the pump after a predetermined delay time (T1); (S4) a step in which the pump is driven through the step (S3) and the power applied to the solenoid is cut off after a delay time (T1) 1-2 seconds; (S5) Even though the solenoid is cut off through the step (S4), the pressure P1 of the inlet port which is substantially the same as the pressure P3 of the second discharge port is higher than the pressure P2 of the first discharge port. The first discharge port is completely closed and the communication state between the inflow port and the second discharge port is maintained; (S6) when the heating operation of the boiler that was operated in the step (S5) is finished, the solenoid is receiving power from the microcomputer; (S7) power is supplied to the solenoid through the step (S6) and the power of the pump is cut off after a predetermined delay time (T1) 1-2 seconds; (S8) turning off the power to the pump through the step (S7) and shutting off the power applied to the solenoid after a predetermined delay time (T2) 2-3 seconds; (S9) when the power to the solenoid is cut through the step (S8), the valve member is moved downward by the weight (gravity) to maintain the second discharge port in the closed state; (S10) the second discharge port is closed through the step (S9) and at the same time the heating mode is terminated in a state in which the inlet port and the first discharge port is in communication; three directions for the boiler comprising a Control method of flow path switching valve. delete The method of claim 1, The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the stop mode to the hot water mode, the hot water mode to the end of the hot water mode (S11) maintaining the second discharge port in a closed state; (S12) when the hot water mode is set by the user's key setting while being maintained in the step (S11), the pump is pumped by receiving power from the microcomputer; (S13) When the power of the pump is applied through the step (S12) and the pressure (P1) of the inlet port substantially the same as the pressure (P2) of the first discharge port is formed higher than the pressure (P3) of the second discharge port Maintaining a closed state of the second discharge port; (S14) the boiler was operated in step (S13) the step of shutting off the power of the pump to end the hot water operation; control method of the three-way flow path switching valve for the boiler comprising a. The method of claim 1, The control method of the three-way flow path switching valve for the boiler when the boiler is switched from the heating mode to the hot water mode, the hot water mode to the heating mode (S15) the boiler is in communication with the inlet port and the second discharge port is operated in the heating mode; (S16) when the solenoid is supplied with power from the microcomputer when it is in the hot water mode according to a user's key setting and a predetermined program while operating in the heating mode of the step (S15); (S17) power is supplied to the solenoid through the step (S16) and the power of the pump is cut off after a predetermined delay time (T3); (S18) cutting off the power of the pump through the step (S17) and cutting off the power applied to the solenoid after a predetermined delay time (T3); (S19) maintaining the communication state between the inflow port and the first discharge port even if the solenoid power is cut through the step (S18); (S20) If the hot water mode is terminated according to the user's key setting or a predetermined program after the step (S19), the mode is switched to the heating mode, and if the hot water mode is not finished, the steps (S16) (S17) (S18) ( Repeating step S19); the control method of the three-way flow path switching valve for a boiler comprising a. The method of claim 5, The delay time (T3) is a control method of the three-way flow path switching valve for the boiler, characterized in that 1-2 seconds.

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