KR920001968Y1 - 3-way valve - Google Patents

Abstract

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Description

3-way Valve for Gas Boiler Using Shape Memory Alloy

1 is a system diagram of a conventional gas boiler.

2 is a cross-sectional view of a conventional three-way valve.

3 is a schematic diagram of a gas boiler to which the present invention is applied.

4 is a cross-sectional view of a three-way valve according to the present invention.

5 is a partial cutaway perspective view of a three-way valve according to the present invention.

6 is a plan view of the present invention.

* Explanation of symbols for main parts of the drawings

10: valve body 11: valve chamber

11a: hot water distribution room 11b: direct distribution room

12: hot water supply inlet 13, 14: hot water supply inlet

15: plate 16: heat detection unit

17: direct inlet 18: direct inlet

19: valve rod 20a, 20b: valve cone

21: spring receiving plate 22: shape memory alloy coil spring

23: bias coil spring 24: switch operating rod

25: adjusting spring 26: adjusting screw

27: temperature control unit 28: reed switch

The present invention relates to a three-way valve for a one-pipe, two-channel gas boiler, and in particular, can be switched to a heating use state and a hot water use state without installing a separate water flow switch. The present invention relates to a three-way valve for a gas boiler using a shape memory alloy that minimizes power consumption, minimizes power consumption, reduces the number of parts, and reduces cost due to a simple structure. .

Generally, there are several types of gas boilers, but for the home, a single-pipe 2-channel gas boiler is widely used from the viewpoint of economical use of heating and hot water.

As shown in FIG. 1, the one-pipe two-channel gas boiler is provided with a heating coil 103 wound around a heat exchanger 102 installed at an upper portion of the gas burner 101, and the inflow stage thereof is a pump 104. Branch connected to the supplementary water tank 105 and the hot water heater 106 through the () and the supply end is connected to the supply side of the hot water heater 106 and the heating pipe 108 through the three-way valve 107, The hot tub 106 has a built-in hot water heating coil 109 and one end is connected to the water line 110, the other end is connected to the hot water discharge pipe 111, the water flow switch 112 in the middle of the direct water line 110 Installed and the supplementary water tank 105 is connected to the return side of the heating pipe 108.

When the heating is used in the above-described one-pipe two-channel gas boiler, since the water flow of the hot water direct line 110 is stopped, the water flow switch 112 is turned off, and the three-way valve 107 is connected to the heating coil ( 103 is switched to the state connecting the heating pipe 108 so that the heating hot water is mixed with the supplemental water tank 105 on the return side of the heating pipe 108 is supplied to the heating coil 103 through the pump 104, Heated and supplied again to the supply side of the heating pipe 108 through the three-way valve 107 is heated while circulating the heating pipe 108.

On the other hand, when hot water is used, when the hot water valve 113 is opened and the hot water outlet 111 is opened, there is water flow in the direct water line 110, the water flow switch 112 is turned on by the water flow, and the three-way valve 107 is a heating coil. Switched to the state connecting the 103 and the hot water heating tube 106, the circulation of the heating hot water on the heating pipe 108 side is blocked and from the hot water heating tube 106 to the heating coil 103 through the pump 104 The hot-water supply water introduced and heated by the combustion heat of the gas burner 101 is supplied to the hot water heating tube 106 through the three-way valve 107, and the hot water heating coil 109 in the direct water line 110 by this hot water supply. Direct water flowing into is heated to be supplied to the hot water discharge pipe 111 will be able to use hot water.

The switching operation between the above-described heating use state and hot water use state is performed by the operation of the three-way valve 107. The operation of the three-way valve 107 is performed by the direct water line 110 for hot water during heating. The water flow is stopped and the water flow switch 112 is turned off. Accordingly, as shown in FIG. 2, the motor 5 of the three-way valve 107 is also turned off to generate no torque, and the torque of the motor 5 is not generated. The valve ball 4 in the valve 107 blocks the port 3 on the hot water heater 106 by the force of an opposing spring (not shown) installed so that the force acts in the opposite direction to the heating pipe. Open the supply side port (2) of 108 so that the heating hot water from the heating coil (103) of the heat exchanger (102) flows through the port (2) to the heating pipe (108) to be heated by return and circulation. It is.

On the other hand, when the hot water is used, when the hot water valve 113 of the hot water discharge pipe 111 is opened, the water flows into the water line 110 and the water flow switch 112 is turned on by the water flow of the water. The drive motor 5 is operated and the valve ball 4 blocks the heating side port 2 and the port 3 on the hot water heater 106 side is opened to release the heating coil 103 from the heat exchanger 102. The hot water flowing into the inlet 1 is supplied into the hot water heater 106 to heat the direct water flowing from the direct water line 110 into the hot water heating coil 109 and again by the circulation pump 104 to the heating coil 103. ) To allow hot water to be used (see solid line in Figure 2).

However, such a conventional three-way valve 107 for the gas boiler in the above-described switching operation in the case of switching from the heating use state to the hot water use state to move the valve ball 4 by the rotational force of the motor (5), on the contrary In the case of switching from the hot water use state to the heating use state, since the valve ball 4 is switched by the elastic restoring force of the opposing spring, the time required for switching between the heating use state and the hot water use state is not constant. Since the switching operation is unstable and power is continuously applied to the motor 5 of the three-way valve 107, there is a problem that power consumption is increased and durability is lowered.

In addition, the motor used for the three-way valve 107 should use a synchronous motor (Synchronous Motor), which is a state of no domestic production, so the situation is causing a huge waste of foreign currency because the total amount depends on imports from foreign countries to be.

On the other hand, there was a method of opening and closing a three-way valve by installing a heat sensing part using fly fins. However, the valve has a large number of components, is complex, has high manufacturing cost, and has a high hysteresis due to the characteristics of paraffin. .

In addition, the paraffin used in this case could not be adequate for domestic production, so it was necessary to rely on imports, resulting in waste of foreign currency.

Therefore, the object of the present invention is that the time required for switching between the heating use state and the hot water use state is constant, so that the switching operation is not only stable, but also the power consumption is minimized, the number of parts is small, and the structure is simple to reduce the cost. It is to provide a three-way valve for a gas boiler using a shape memory alloy.

Another object of the present invention is to enable a smooth switching operation between the heating use state and the hot water use state without installing a separate water flow switch in the direct line.

Hereinafter, a three-way valve for a gas boiler using a shape memory alloy according to the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 show a three-way valve using a shape memory alloy according to the present invention, and FIG. 3 shows a system of a gas boiler to which the three-way valve according to the present invention is applied. The valve chamber 11, the hot water supply inlet 12, the two hot water supply outlets 13 and 14, the direct water inlet 17 and the direct water outlet 18 are formed.

The hot water supply inlet 12 and the hot water supply outlet 13 and 14 are passages through which the hot water is heated in the heating coil 103 of the heat exchanger 102 shown in FIG.

The inside of the valve chamber 11 of the valve body 10 is partitioned into the hot water supply distribution chamber 11a and the direct water distribution chamber 11b by the heat sensing unit 16 using both diaphragms 15 and the shape memory alloy. The direct water inlet 17 and the direct water outlet 18 are formed in a direction different from the water flow direction of the hot water inlet 12 and the hot water outlet 13, 14, for example, orthogonal.

In the direct water distribution chamber 11b, a valve rod 19 penetrating the diaphragm 15 is installed and at both ends thereof, a valve cone positioned between the diaphragm 15 and both hot water supply outlets 13 and 14 ( 20a) 20b is fixedly installed, and a spring support plate 21 is fixedly installed at the middle of the valve rod 19 to the valve rod 19, and a shape memory alloy is formed between the side plates 15 and the spring support plate 21. Coil springs 22 and bias coil springs 23, which are general coil springs, are provided facing each other.

The shape memory alloy coil spring 22, when the heat of relatively hot phosphorous water is transferred, its transformation force is stronger than the elastic force of the bias coil spring 23, which is a general coil spring, and transfers heat of relatively low temperature when hot water is used. When the transformation force is dissipated, it is assumed that the transformation force is weaker than the elastic force of the bias coil spring 23.

In addition, the shape memory alloy coil spring 22 is installed so that the transformation generating force acts in the direction in which the valve cone 20b closes the hot water supply outlet 14 on the side of the hot water heater 106, the bias coil spring 23 ) Is installed so that the elastic force acts in the direction of closing the hot water supply outlet 13 on the heating pipe 108 side.

The valve body 10 forms an extension case part 10a to penetrate the switch actuating rod 24 connected to the end of the spring support plate 21, and at one end thereof, an adjustment spring 25 and a temperature adjusting screw 26. And a temperature controller 27 having a) and a reed switch 28 for controlling the gas boiler by sending a switching state signal of a three-way valve to an electronic control unit (not shown).

In the system of the one-pipe two-channel gas boiler to which the three-way valve of the present invention configured as described above is applied, the heating coil 103 is wound around the heat exchanger 102 installed on the upper part of the gas burner 101 as in the third diagram. The inlet end is connected to the supplementary water tank 105 and the hot water heater 106 through the pump 104, the supply end is a hot water heater 106 and the heating pipe 108 through the three-way valve 107 Branch connected to the supply side, and the hot water heating coil 106 has a built-in hot water heating coil 109, one end of which is connected to the water line 110, and the other end of the three-way valve 107 of the direct shoe distribution room (11b) It is connected to the hot water discharge pipe 111 through the), and the supplementary water tank 105 is connected to the return side of the heating pipe 108.

In the use of the gas boiler to which the three-way valve of the gas boiler using the shape memory alloy spring of the present invention is applied, the transformation force of the shape memory alloy coil spring 22 is greater than the elastic force of the bias coil spring 23 when heating is used. To open the supply side hot water supply outlet 13 of the heating pipe 108 and close the hot water supply outlet 106 side the hot water supply outlet 14 to supply the hot water introduced through the hot water inlet 12 from the heating coil 103. The water is supplied to the heating pipe 108 to perform heating, and when the user opens the hot water valve 113 of the hot water discharge pipe 111 to use hot water, the direct water passes through the direct distribution chamber 11b. The transformation occurs in the shape memory alloy coil spring 22 and its spring elasticity becomes weaker than the elastic force of the bias coil spring 23, thereby opening the hot water supply outlet 14 on the hot water heater 106 and opening the heating pipe 108. ball The hot water supply hot water outlet 13 is closed to supply hot water to the hot water heater 106 so that hot water can be used.

That is, during the use of heating, the hot water of the hot water flowing through the hot water inlet 12 of the three-way valve 107 from the heating coil 103 flows in the hot water supply distribution chamber 11a. It is transmitted to the shape memory alloy coil spring 22 through the branch 16, and the transformation occurs in the shape memory alloy coil spring 22 so that the spring elastic force is greater than the elastic force of the bias coil spring 23, and thus the shape memory alloy coil The spring 22 pushes the spring support plate 21 against the bias coil spring 23, and the valve cone 20b fixed to the spring support plate 21 is pushed while the valve rod 19 fixed to the spring support plate 21 is pushed. The valve cone 20a fixed to the other side by closing the hot water supply outlet 106 side hot water supply outlet 14 and opening the hot water supply outlet 13 side of the heating pipe 108 opens the hot water supply inlet 12. The introduced hot water is supplied to the heating pipe 108 through the hot water outlet 13. As class is circulated to be heated to a continuously repeated cycle operation while being heated is returned to the heating coil 103 via a pump 104 again after the heat-exchange action, and as a supplement water tank (105).

At this time, when the temperature supplied to the heating pipe 108 is lower than the set comfort heating temperature, the temperature transferred to the shape memory alloy coil spring 22 through the heat sensing unit 16 is the transformation of the shape memory alloy coil spring 22. Since the transformation of the shape memory alloy coil spring 22 hardly occurs since the temperature is lower than the temperature, the elastic force of the shape memory alloy spring 22 is smaller than the elastic force of the bias coil spring 23, so that the bias coil spring 23 is The valve rod 19 and the valve cones 20a and 20b are moved against the shape memory alloy coil spring 22 to close the hot water supply outlet 13 on the heating piping 108 side and the hot water heater 106 side. Opening the hot water supply outlet 14 allows the hot water circulating the hot water heating path to shorten the hot water heating path to shorten the time to reach the comfort heating temperature, and also enter the heat exchanger 102 at the beginning of the operation of the gas boiler felled When the temperature of the heating water is low, it is possible to minimize condensation that may occur in the process of heating to the set temperature of the hot water via the path of the long heating pipe 108 side circulation path.

On the other hand, when the direct water flows to the direct water line 110 by opening the hot water valve 113 of the hot water discharge pipe 111 in order to use hot water, the low temperature direct water flows through the direct water inlet 17 of the three-way valve 107. As the water flows into the water distribution chamber 11b and comes into contact with the heat sensing unit 16 and the shape memory alloy coil spring 22, the temperature of the shape memory alloy coil spring 22 is lowered so that its transformation hardly occurs and its elastic force is biased. The bias coil spring 23 is smaller than the elastic force of the coil spring 23, and thus the bias coil spring 23 has the valve rod 19 and the valve cone 20a, 206 with respect to the shape memory alloy coil spring 22 as described above. Is moved in the opposite direction so that the valve cone 20a closes the hot water supply outlet 13 on the heating pipe 108 and opens the hot water supply outlet 14 on the hot water heater 106 to heat the heating pipe 108. Side hot water supply is cut off and hot water supply is hot water heater 106 The hot water is supplied to the heating coil passing through the heating coil 109 to be able to supply hot water.

In the hot water use state, when the valve rod 19 is moved by the bias coil spring 23, the valve rod 19 is penetrated through the extension case 10a of the valve body 10 and the valve rod 19 is provided by the spring support plate 21. The switch operation rod 24 connected to the main body is pressed by the reed switch 28 installed on the outer surface of the body 10, and the electric signal generated at this time is transmitted to the electronic control unit (not shown) so that the operation state of the gas boiler is hot water. Allows you to detect the status of use.

The reed switch 28 transmits the operation state of the three-way valve 107 to the electronic unit to enable a proportional control when using heating and hot water so that it can be controlled to a state suitable for using heating and hot water.

The temperature control unit 27 adjusts the pressure of the adjustment spring 25 elastically installing the switch operating rod 24 by the adjustment screw 26 on / off operation of the reed switch 28 during heating and hot water use. You can adjust the temperature according to.

The above-mentioned hot water use state is continuously maintained while the user opens the hot water valve 113 of the hot water discharge pipe 111, and the hot water supply water passing through the hot water supply distribution room 11a when the user locks the hot water valve 113. As the temperature of the shape memory alloy coil spring 22 rises due to the transformation, the transformation occurs and the three-way valve 107 is switched to the above-described heating use state.

As described above, according to the present invention, the valve in the three-way valve 107 using the shape memory alloy coil spring 22 and the general bias coil spring 23 which acts against each other in switching from the heating use state to the hot water use state. Since it is made according to the temperature of the water flow passing through the chamber 11, the time required for switching between these use states becomes constant, so that the switching operation is not only stable but also the power consumption is minimized, the number of parts is small, and the structure is simple. The cost can be reduced.

In addition, since the switching operation between the heating use state and the hot water use state is performed smoothly without installing a separate water flow switch in the direct water line 110, the piping and facilities of the gas boiler are simplified, and each state is detected to detect the heating and hot water use states. It can be controlled in an appropriate state.

Claims (3)

In the valve body 10, the valve chamber 11, the hot water supply inlet 12, and the hot water supply outlets 13 and 14 on both sides, the inside of the valve chamber 11 of the valve body 10 is hot water The water supply chamber 11a and the water distribution chamber 11b are partitioned to form a water inlet 17 and a water outlet 18 in the water distribution chamber 11b, and a valve rod (11) in the water distribution chamber 11b. 19) and the valve cones 20a and 20b which are positioned between both sides of the hot water supply outlets 13 and 14 are fixed to both ends thereof, and the spring support plate 21 is fixed to the middle of the valve rod 19. A three-way valve for a gas boiler using a shape memory alloy, which is installed and loaded on both sides of the shape memory alloy coil spring 22 and the bias coil spring 23 which is a general coil spring. The hot water supply distribution chamber (11a) and the direct water distribution distribution chamber (11b) in the valve chamber (11) are partitioned by heat detectors (16) using both diaphragms (15) and shape memory alloys. 3-way valve for gas boiler using phosphorus shape alloy. According to claim 1, wherein the valve body (10) is formed by extending the casing portion (10a) through the switch operating rod 24 connected to the end of the spring support plate (21) and one end of the adjustment spring (25) And a temperature controller 27 having a temperature adjusting screw 26, and on the other end, a reed switch 28 for controlling a gas boiler by sending a switching state signal of a three-way valve to an electronic control unit. 3-way valve for gas boiler using memory alloy.