KR20090012911U - Water heaters, including expansion tanks with rotating shut-off valves, and expansion tanks for water heaters used therein - Google Patents

Abstract

Disclosed are a water heater including an expansion tank having a rotation type on / off valve capable of stably opening and closing a hot water inlet installed in an expansion tank, and an expansion tank for a water heater used therein.

The water heater is a hot water tank for heating and storing the water contained therein; And a hot water inlet through which hot water is introduced from the hot water tank when the hot water tank is overheated, and installed at the hot water inlet, and rotated around the rotating shaft by buoyancy of hot water introduced from the hot water tank to open the hot water inlet. And an expansion tank having an on / off valve for closing the hot water inlet by rotating about the rotating shaft when the introduced hot water returns to the hot water tank.

According to such a water heater, since the opening and closing valve is limited to the movement trajectory, it is possible to accurately block the hot water inlet of the expansion tank at a desired moment, thereby preventing the air from flowing into the hot water tank through the hot water inlet.

Water heater, expansion tank, on / off valve, rotating, contact member, sealing member

Description

Water heater and expansion tank for water heater including the expansion tank having a rotational opening and closing valve {Water Heater And Expansion Tank Used Therefor}

The present invention relates to a water heater having an expansion tank for receiving water overheated in a hot water tank and an expansion tank for a water heater used therein, and more specifically, to a hot water inlet and / or an air distribution port installed in an expansion tank. The present invention relates to a water heater including an expansion tank having a rotary type on / off valve that can be opened and closed stably and an expansion tank for a water heater used therein.

A water heater is a device for discharging hot water by heating water, which may be provided in a device for purifying water, such as a water purifier or an ionizer, or may be directly connected to a tap water in a sink or the like.

Such a water heater has a phenomenon in which a large volume of hot water is discharged through the faucet when the hot water filled in the hot water tank is overheated (overheating).

In order to solve this problem, a water heater having an expansion tank has been proposed as shown in FIG. 1 to accommodate the overheated and expanded hot water.

The water heater 10 shown in FIG. 1 is of a built-in type, which is disposed inside the sink not shown and connected to a facet on the top of the sink to discharge hot water.

As shown in FIG. 1, the conventional water heater 10 includes a hot water tank 20 that heats water through a heater 25 and stores heated hot water, and the hot water tank 20 is overheated. When the hot water tank 20 is provided with an expansion tank 30 for receiving the volume of hot water.

At this time, the hot water tank 20 heats and stores the water supplied through the raw water inlet pipe 41 when the valve 42 is opened, and supplies the heated hot water to the faucet 50 through the hot water outlet 26. Done.

In addition, the raw water inlet pipe 41 and the expansion tank 30 is connected via a connecting pipe 46. Therefore, when overheating occurs in the hot water tank 20 to increase the volume of the hot water, the hot water rising through the raw water inlet pipe 41 is accommodated in the expansion tank 30.

At this time, when the amount of the expanded hot water exceeds the capacity of the expansion tank 30, the discharge pipe connecting the faucet 50 and the expansion tank 30 so as to discharge the hot water through the faucet 50 ( 47). On the other hand, so that the hot water discharged through the hot water outlet 26 is not introduced into the expansion tank 30 through the discharge pipe 47, the faucet 50 is discharge pipe for discharging the hot water overheated in the expansion tank (30) An inner tube 55 partitioning the flow path through which the hot water is discharged from the 47 and the hot water tank 20 is formed.

With reference to Figures 1 and 2a, 2b looks at the operation of the conventional water heater (10).

First, when the user opens the valve 42 to use hot water, raw water is supplied from a water tap or a water purifier (water filter), which is not shown. The supplied raw water is introduced into the hot water tank 20 through the raw water inlet pipe 41, heated by the heater 25 in the hot water tank 20, and the hot water received in the hot water tank 20 receives the pressure of the raw water introduced. By the discharge through the hot water outlet 26 and the facet 50.

In addition, when the user closes the valve 42 after the use of the hot water, the discharge of the hot water through the hot water outlet 26 is terminated and the water in the hot water tank 20 is heated to an appropriate temperature by the heater 25.

On the other hand, when the hot water in the hot water tank 20 is overheated due to overheating of the heater 25 or the like, the volume of the hot water increases due to the temperature increase of the water. As a result, the water level of the hot water rises, and the raw water is filled into the flow path above the raw water inlet pipe 41 and the hot water outlet 26.

As shown in FIG. 2A, the water filled in the raw water inflow pipe 41 is introduced into the expansion tank 30 through the connection pipe 46.

The hot water continuously introduced into the expansion tank 30 is pushed up the ball-shaped float 33 located at the hot water inlet 31 side of the expansion tank 30 as shown in FIG. ) Is housed inside. At this time, the float 33 is made of a material having a specific gravity smaller than the water so that it can rise by the buoyancy of hot water flowing into the expansion tank (30).

If the overheating is performed in excess of the capacity of the expansion tank 30, the overheated hot water is externally supplied through the air outlet 32, the discharge pipe 47, and the inner pipe 55 of the facet 50. To be discharged.

On the other hand, when the temperature of the hot water contained in the hot water tank 20 is lowered due to the supply of raw water of low temperature or the stop of the heater 25, etc., the hot water remaining in the expansion tank 30 is opened. Will be moved back to the hot water tank 20 through the connector (46).

Due to this, the water level of the expansion tank 30 is lowered, and as the water level of the expansion tank 30 is lowered, the float 33 is guided to the guide member 34 to move toward the hot water inlet 31, and the expansion tank ( In the state where the hot water discharge in 30 is completely terminated, the hot water inlet 31 is blocked to prevent air from flowing into the hot water tank 20.

Such a conventional water heater 10 can be effectively prepared for overheating by having an expansion tank 30, the float 33 closes the hot water inlet 31 when the expansion tank 30 is empty, the hot water tank 20 Air is introduced into the air) to minimize the phenomenon that bubbles are generated.

On the other hand, in the conventional water heater 10, when the valve 42 is opened and the raw water of low temperature is supplied, a pressure drop occurs while the raw water passes through the pressure reducing member 43 made of an orifice or the like, and thus the pressure reducing member 43 is downstream. Due to the pressure difference between the raw water inlet pipe 41 and the expansion tank 30, the hot water in the expansion tank 30 is rapidly moved to the raw water inlet pipe 41 side. As such, when the hot water in the expansion tank 30 is suddenly escaped, the float 33 is severely flowed near the hot water inlet 31, so that the hot water inlet 31 is closed after a little after the discharge of the hot water. There is a case.

That is, when hot water moves from the expansion tank 30 to the hot water tank 20, the hot water is completely discharged and the hot water inlet 31 must be closed to prevent the inflow of air into the hot water tank 20. Since the water heater 10 is not limited in the motion trajectory of the float 33, the float 33 rotates rapidly or vibrates at the hot water inlet 31 side, and thus the hot water inlet 31 cannot be closed at a desired moment. There is a problem that the air flows into the (20).

In the conventional water heater 10, when the overheating is performed in excess of the capacity of the expansion tank 30, the overheated hot water is discharged to the outside through the inner pipe 55 of the discharge pipe 47 and the facet 50. It has a configuration to discharge. Therefore, since the facet 50 should be a double pipe structure having an inner tube 55, the manufacturing cost of the facet 50 increases and a flow path connecting the discharge tube 47 and the facet 50 is formed. There has been a problem that the flow path is complicated and difficult to install because it should be.

In addition, the conventional water heater should be provided with a guide member 34 for guiding the float 33 to move around the hot water inlet 31, the guide member 34 is made of a rib of thin thickness expansion tank (30) Since the height of the guide member 34 needs to be increased, it is difficult to form the guide member 34 inside the expansion tank 30, which causes a problem that the manufacturing of the expansion tank 30 is difficult.

The present invention has been made to solve at least some of the problems of the prior art described above, and includes an expansion tank having a rotational shut-off valve that can accurately block the hot water inlet and / or air outlet of the expansion tank at the desired moment. An object of the present invention is to provide a water heater and an expansion tank for a water heater used therein.

In addition, an object of the present invention is to provide a water heater including an expansion tank having a rotational open / close valve capable of stably sealing the hot water inlet and / or the air outlet of the expansion tank and an expansion tank for a water heater used therein. do.

In addition, the present invention aims to provide a water heater including an expansion tank having a rotation type on / off valve and an expansion tank for a water heater used therein to prevent the overheated hot water from being discharged through the air outlet.

In addition, an object of the present invention is to provide a water heater including an expansion tank having a rotational open / close valve, and an expansion tank for a water heater used therein, which is easy to manufacture the expansion tank.

As one aspect for achieving the above object, the present invention is a hot water tank for heating and storing the water contained therein; And a hot water inlet through which hot water is introduced from the hot water tank when the hot water tank is overheated, and installed at the hot water inlet, and rotated around the rotating shaft by buoyancy of hot water introduced from the hot water tank to open the hot water inlet. And an expansion tank having an on / off valve for closing the hot water inlet by rotating about the rotating shaft when the introduced hot water returns to the hot water tank.

Preferably, the opening and closing valve may include a shaft member constituting a rotating shaft, and a contact member connected to the shaft member to rotate and close the hot water inlet.

At this time, the shaft member may be rotatably installed on the shaft support member provided in the expansion tank.

Preferably, the on-off valve may be further provided with a stopper for preventing the rotation to more than the set position when rotating to open the hot water inlet.

More preferably, the stopper extends from the shaft member to the opposite side of the contact member and may contact the protrusion provided on the bottom surface of the expansion tank when the on / off valve rotates.

Preferably, the contact member may include a contact portion which contacts the circumference of the hot water inlet and closes the hot water inlet, and a depression formed in the center of the contact portion upwardly.

Also preferably, the contact member may be a flat, spherical or hemispherical contact portion for closing the hot water inlet.

Preferably, a soft sealing member may be installed at a portion of the circumference of the hot water inlet contacting the contact member.

Also preferably, the contact member may be provided with a soft sealing member in contact with the circumference of the hot water inlet to close the hot water inlet.

In this case, the sealing member may be made of silicon.

As another aspect, the present invention is a hot water tank for heating and storing the water contained therein; And a hot water inlet through which hot water flows from the hot water tank when the hot water tank is overheated, an air distribution port through which external air flows, and a buoyancy force of the hot water introduced from the hot water tank. Provides a water heater comprising; an expansion tank which rotates around the rotation shaft and rotates around the rotary shaft to open the air distribution port when the hot water is returned to the hot water tank by rotating to the center. do.

In another aspect, the present invention is an expansion tank for a water heater for storing the hot water introduced from the hot water tank when the hot water tank is overheated, the hot water inlet for the hot water is introduced from the hot water tank; And installed at the hot water inlet, and rotates around the rotary shaft by buoyancy of the hot water introduced from the hot water tank to open the hot water inlet, and rotates around the rotary shaft when the introduced hot water returns to the hot water tank. It provides an expansion tank for a water heater, including; a first opening and closing valve for closing the hot water inlet.

Preferably, the expansion tank for the water heater is an air distribution port through which the outside air flows; And installed in the air outlet, and rotates around the axis of rotation by the buoyancy of the hot water introduced from the hot water tank to close the air outlet, around the axis of rotation when the incoming hot water is returned to the hot water tank It may further include a; second opening and closing valve to rotate to open the air outlet.

According to an embodiment of the present invention, since the movement trajectory of the on / off valve is limited by rotating the on / off valve about the rotary shaft, the on / off valve can accurately block the hot water inlet and / or the air outlet of the expansion tank at a desired moment. It is possible to obtain the effect of preventing the inflow of hot water into the hot water tank through the inlet or discharge of hot water through the air outlet.

In addition, according to an embodiment of the present invention, by providing a sealing member in the contact portion between the on-off valve and the hot water inlet and / or the air outlet, there is an effect that it is possible to stably seal the hot water inlet and / or the air outlet.

And, according to an embodiment of the present invention, by providing a depression in the contact member provided in the on-off valve, it is possible to obtain the effect of smoothly rotating the on-off valve by the buoyancy of hot water flowing into the expansion tank.

In addition, according to an embodiment of the present invention by closing the air outlet port of the expansion tank through the rotary type on-off valve, no separate flow path for discharging hot water over the expansion tank capacity is required and the facet There is no need to set up a double pipe structure, thereby reducing the manufacturing cost of the facet and simplifying the configuration of the flow path.

In addition, according to one embodiment of the present invention, unlike the conventional water heater, since a separate guide member for preventing the detachment of the float (opening and closing valve) is not required, the expansion tank may be easily manufactured.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in more detail.

Figure 3 is a schematic diagram showing the configuration of the water heater according to the present invention, Figure 4 is a schematic diagram showing an embodiment of an expansion tank of the water heater according to the present invention, Figure 5 is another embodiment of the expansion tank of the water heater according to the present invention 6 is a schematic view showing an example, and FIG. 6 is a perspective view of the on / off valve shown in FIGS. 4 and 5. In addition, Figure 7 and Figure 8 is a schematic view showing another embodiment of the expansion tank of the water heater according to the present invention, Figure 7 (a) and Figure 8 (a) is a state in which the heated water is introduced into the expansion tank 7 (b) and 8 (b) are schematic views of a state in which hot water overheated in the expansion tank is discharged.

As shown in FIG. 3, the water heater 100 according to an embodiment of the present invention includes a hot water tank 110 and an expansion tank 120, as shown in FIGS. 4 to 8. The tank 120 is provided with a rotation type on / off valve 200, 200 ′.

First, referring to Figure 3 looks at the overall configuration of the water heater 100 according to an embodiment of the present invention.

As shown in FIG. 3, the water heater 100 according to the present invention includes a hot water tank 110 for heating water through a heater 115 and storing heated hot water, and the hot water tank 110 overheating. It is provided with an expansion tank 120 for receiving the hot water volumetric expansion in the hot water tank (110).

At this time, the hot water tank 110 heats and stores the water supplied through the raw water inlet pipe 141 when the valve 142 is opened, and the heated hot water through the hot water outlet 116 and the discharge pipe 147. Discharge to 150.

In addition, the expansion tank 120 receives the hot water in which the volume is expanded when the hot water tank 110 is overheated, and a hot water inlet 121 through which hot water flows from the hot water tank 110 on the lower surface of the expansion tank 120. ) Is formed. In addition, the hot water inlet 121 is connected through the raw water inlet pipe 141 and the connection pipe 130. Therefore, when the overheating occurs in the hot water tank 110 to increase the volume of the hot water, the hot water whose water level is increased is accommodated in the expansion tank 120 through the raw water inlet pipe 141 and the hot water inlet 121.

Then, the upper side of the expansion tank 120 is formed with an air distribution port 122 in communication with the external atmosphere to facilitate the inflow or outflow of hot water in the expansion tank (120).

On the other hand, the raw water inlet pipe 141 is provided with a pressure reducing member 143 made of an orifice so that the pressure drop occurs when the valve 142 is opened to supply the raw water of low temperature. Therefore, when raw water is introduced, hot water in the expansion tank 120 is discharged to the raw water inflow pipe 141 due to the pressure difference between the raw water inflow pipe 141 and the expansion tank 120 in the downstream portion of the pressure reducing member 143. Return to the hot water tank (110).

The expansion tank 120 will be described in more detail with reference to FIG. 4.

As shown in FIG. 4, the on / off valve 200 is installed at the hot water inlet 121 of the expansion tank 120, and the expansion tank 120 has two openings to facilitate the manufacture and installation of the on / off valve 200. It may be formed separately from more than one member (120a, 120b).

When the overheating occurs in the hot water tank 110, the on-off valve 200 is rotated around the rotating shaft by the buoyancy of hot water flowing from the hot water tank 110 to open the hot water inlet 121, expansion tank 120 When the hot water introduced into the back is returned to the hot water tank 110, it rotates around the rotating shaft to close the hot water inlet 121. To this end, the on-off valve 200 is preferably formed of a material having a specific gravity less than 1, or at least an average specific gravity less than 1.

As shown in FIGS. 4 and 6, the open / close valve 200 includes a shaft member 210 that forms a rotating shaft, a connection member 240 extending from the shaft member 210, and the connection member 240. The contact member 220 is connected to the shaft member 210 and rotates to be in contact with the circumference of the hot water inlet 121 or the contact is released to open and close the hot water inlet 121. At this time, the shaft member 210 is rotatably installed on the shaft support member 123 provided in the expansion tank (120).

In addition, the opening and closing valve 200 may be further provided with a stopper 230 to prevent the rotation of the hot water inlet 121 of the expansion tank 120 to rotate more than the set position when rotating. The stopper 230 is formed to extend from the shaft member 210 to the opposite side of the contact member 220 and to contact the protruding protrusion 124 provided on the bottom surface of the expansion tank 120 when the on / off valve 200 is rotated. It may be configured, but if the rotation of the on-off valve 200 can be limited, the structure or position is not particularly limited.

Through the configuration of the stopper 230, the rotation range of the on-off valve 200 is limited, and thus, when the hot water flows into and out of the expansion tank 120, the rotation of the on-off valve 200 is caused by the buoyancy of the hot water. It can be made stable.

Meanwhile, as shown in FIGS. 4 and 6, the contact member 220 of the open / close valve 200 is in contact with a circumference of the hot water inlet 121 to close the hot water inlet 121, and a contact part ( 221 may be provided with a recessed portion 222 recessed upward in the center. At this time, the contact portion 221 may have a configuration to make a curved surface and the line contact with the circumference of the hot water inlet 121, the shape is not limited to this may be made of a plane if a stable closing of the hot water inlet 121 is possible. have.

In addition, the contact member 220 is formed with a recessed portion 222 recessed upwardly so that the contact member 220 can easily float due to the buoyancy of the hot water when the heated water is introduced into the expansion tank 120. do.

In addition, as illustrated in FIG. 4, the expansion tank 120 may have a soft sealing member 250 installed around the hot water inlet 121. The sealing member 250 is in contact with the contact portion 221 of the contact member 220, the on-off valve 200 is able to reliably seal the hot water inlet 121. However, the sealing member 250 may be installed in the contact portion 221 of the contact member 220 as shown in FIG. 7 to be described later.

The sealing member 250 may be formed of silicon, but is not limited thereto if it can secure the sealing performance.

As described above, the water heater 100 and the expansion tank 120 for the water heater according to the present invention rotate the on / off valve 200 about the rotational axis so that the movement trajectory of the on / off valve 200 is limited, so the on / off valve 200 is expanded. The hot water inlet 121 of the tank 120 can be blocked precisely at a desired moment, thereby preventing the air from flowing into the hot water tank 110 through the hot water inlet 121.

In addition, the conventional water heater 10 shown in Figs. 1, 2A and 2B vertically guides the guide member 34 made of a thin rib to guide the float 33 to move around the hot water inlet 31. There is a problem in that it is difficult to manufacture the expansion tank 30 because it should be formed long, but according to the present invention does not need to provide a separate rib it is easy to manufacture the expansion tank 120.

As shown in FIG. 5, the expansion tank 120 provided in the water heater 100 according to the present invention may be provided with an opening / closing valve 200 ′ at the air outlet 122 as well as the hot water inlet 121. .

The on-off valve 200 'installed at the air distribution port 122 side also has a shaft member 210' constituting a rotating shaft and the shaft member 210 ', similarly to the on-off valve 200 installed at the hot water inlet 121. Connected to the shaft member 210 'and rotated through the connecting member 240' extending from the connecting member 240 'and the connecting member 240'. A contact member 220 'for opening and closing the sphere 122 may be provided. At this time, the shaft member 210 'is rotatably installed on the shaft support member 123' provided at the upper portion of the expansion tank 120.

In addition, the opening and closing valve 200 ′ may further include a stopper 230 ′ so as to prevent rotation of the expansion valve 120 when the air outlet 122 of the expansion tank 120 is rotated beyond a set position. have. The stopper 230 ′ is formed to extend from the shaft member 210 ′ to the opposite side of the contact member 220 ′ and protruded protrusion 124 provided on the upper surface of the expansion tank 120 when the on / off valve 200 ′ is rotated. ') Can be configured to contact, but if the rotation of the on-off valve 200' can be limited, its structure or position is not particularly limited.

The rotation range of the on-off valve 200 'is limited through the configuration of the stopper 230', and thus the on-off valve 200 'is caused by the buoyancy of the hot water when the hot water flows into and out of the expansion tank 120. The rotation of can be achieved stably.

Meanwhile, referring to FIG. 5, the rotary type on / off valve 200 ′ installed in the air outlet 122 may have the same shape as the rotary type on / off valve 200 installed on the hot water inlet 121 shown in FIG. 6. However, the present invention is not limited thereto, and may have a shape of the rotation type on / off valves 200 and 200 ′ shown in FIG. 7 or 8. In addition, although FIG. 5 illustrates that the rotary type on / off valves 200 and 200 ′ are installed at both sides of the air distribution port 122 and the hot water inlet 121, the on / off valve may be formed on only one side. In addition, the on / off valve 200 'installed at the hot water inlet 121 and the air outlet 122 may have other types of on / off valves.

In addition, a soft sealing member 250 ′ made of silicon or the like is installed around the air outlet 122 of the expansion tank 120 so that the on / off valve 200 ′ can stably close the air outlet 122. Can be.

As such, when the water heater 100 and the expansion tank 120 for the water heater according to the present invention is provided with the rotation type opening / closing valve 200 'at the air distribution port 122 side, the expansion tank 120 becomes full level, By opening / closing the valve 200 ′ and closing the air outlet 122 accurately, it is possible to prevent the outflow of the heated hot water through the air outlet 122. That is, since the on / off valve 200 'is rotated about the rotational axis, the movement trajectory of the on / off valve 200' is limited, and therefore the on / off valve 200 'accurately opens the air outlet 122 of the expansion tank 120. You can block.

In addition, the conventional water heater 10 shown in FIGS. 1, 2A, and 2B is connected to the air outlet 32 when the heated water is overheated when the overheating occurs in excess of the capacity of the expansion tank 30. It is configured to discharge to the outside of the water heater 10 through the discharge pipe 47 and the inner pipe 55 of the facet 50, the cost of forming a double pipe structure of the facet 50, as well as the air outlet There was a problem in that a separate discharge tube 47 for connecting the inner tube 55 of the 32 and the facet 50 is required. However, in the present invention, since the open / close valve 200 ′ closes the air outlet 122, hot water is not discharged to the outside of the expansion tank 30 so that the hot water heater 10 may be discharged. There is no need for a complicated flow path configuration and there is no need for a separate structure for the facet 150.

In addition, the on / off valve 200 ′ accurately closes the air outlet 122 to prevent hot water from being discharged into the water heater 100, thereby preventing malfunction or electric shock of the water heater 100. do.

On the other hand, in case overheating occurs in excess of the capacity of the expansion tank 120, the capacity of the expansion tank 120 may be increased or a method of sufficiently controlling the temperature of the hot water tank 110 may be used. Even if the open / close valve 200 ′ closes the air outlet 122, a problem due to overheating exceeding the capacity of the expansion tank 120 can be prevented.

7 (a) and 7 (b) show another embodiment of the expansion tank 120, FIG. 7 (a) shows a state in which hot water is completely introduced into the expansion tank 120, and FIG. 7 (b) shows a state in which hot water is completely discharged from the expansion tank (120).

7 (a) and 7 (b), the contact members 220 and 220 'of the rotary type on / off valves 200 and 200' are formed in contact with the hot water inlet 121 or the air outlet 122 in a flat surface. In addition, since the sealing members 250 and 250 ′ are installed at the contact portions of the plane, they are similar to the on / off valves 200 and 200 ′ of FIG. 5, and thus, detailed descriptions thereof will be omitted to avoid overlapping descriptions.

8 (a) and 8 (b) show another embodiment of the expansion tank 120, FIG. 8 (a) shows a state in which hot water is completely introduced into the expansion tank 120, and FIG. 8 (b) shows a state in which hot water is completely discharged from the expansion tank 120.

The contact member 220 of the on-off valve 200 shown in FIGS. 8 (a) and 8 (b) is the on / off valve of FIG. 4 except that the contact portion contacting the hot water inlet 121 is formed in a spherical surface. Since it is similar to (200), specific details will be omitted in order to avoid duplicate description.

In addition, the on-off valve 200 shown in FIGS. 8A and 8B has a contact portion formed as a spherical surface, but the contact portion may be formed as a hemispherical surface.

As such, when the contact member 220 of the open / close valve 200 is formed in a spherical shape or a hemispherical shape, the hot water inlet 121 may have a hot water inlet 121 so as to stably seal the hot water inlet 121. It may have an inclined surface as shown in a) and Figure 8 (b).

Although specific embodiments of the present invention have been illustrated and described, those of ordinary skill in the art can vary the present invention without departing from the spirit and scope of the present invention as described in the following Utility Model Registration Claims. It will be clear that it can be modified and changed.

1 is a schematic view showing the configuration of a water heater according to the prior art.

Figure 2a is a schematic diagram of a state just before the hot water is introduced into the expansion tank of the water heater shown in FIG.

Figure 2b is a schematic diagram of a state in which hot water is introduced into the expansion tank of the water heater shown in FIG.

3 is a schematic view showing the configuration of a water heater according to the present invention.

Figure 4 is a schematic diagram showing an embodiment of an expansion tank of the water heater according to the present invention.

Figure 5 is a schematic diagram showing another embodiment of the expansion tank of the water heater according to the present invention.

6 is a perspective view of the on-off valve shown in FIGS. 4 and 5.

7 is a schematic view showing another embodiment of the expansion tank of the water heater according to the present invention,

  7 (a) is a schematic diagram of a state in which hot water overheated in an expansion tank is introduced;

  Figure 7 (b) is a schematic diagram of a state in which the heated hot water is discharged from the expansion tank.

8 is a schematic view showing another embodiment of the expansion tank of the water heater according to the present invention,

  8 (a) is a schematic diagram of a state in which hot water overheated in an expansion tank is introduced,

  Figure 8 (b) is a schematic view of a state in which the heated hot water discharged from the expansion tank.

Explanation of symbols on the main parts of the drawings

100 ... water heater 110 ... hot water tank

120 ... Expansion tank 121 ... Hot water inlet

122 ... Air outlet 123,123 '... Shaft support member

200, 200 '... opening valve 210.210' ... shaft member

220, 220 '... contact member 230, 230' ... stopper

250, 250 '... Sealing member

Claims (13)

Hot water tank for heating and storing the water contained therein; And When the hot water tank is overheated, the hot water inlet through which hot water is introduced from the hot water tank and the hot water inlet are installed at the hot water inlet, and rotate around the rotating shaft by buoyancy of the hot water introduced from the hot water tank to open the hot water inlet. And an expansion tank having an on / off valve for closing the hot water inlet by rotating about the rotating shaft when the introduced hot water returns to the hot water tank. The method of claim 1, The on-off valve has a shaft member constituting a rotating shaft and a contact member connected to the shaft member to rotate and close the hot water inlet. The method of claim 2, The shaft member is a water heater, characterized in that rotatably installed on the shaft support member provided in the expansion tank. The method of claim 2, The on-off valve, the water heater further comprises a stopper to prevent the rotation to the rotation of the setting position or more when opening the hot water inlet. The method of claim 4, wherein The stopper extends from the shaft member to the opposite side of the contact member, and the water heater is in contact with the projection provided on the lower surface of the expansion tank when the on-off valve is rotated. The method according to any one of claims 2 to 5, The contact member is provided with a contact portion for closing the hot water inlet in contact with the circumference of the hot water inlet, and a water heater characterized in that the depression formed in the upper portion in the center of the contact portion. The method according to any one of claims 2 to 5, The contact member is a hot water heater, characterized in that the contact portion for closing the hot water inlet is flat, spherical or hemispherical. The method of claim 2, The water heater, characterized in that a soft sealing member is installed in the portion of the circumference of the hot water inlet contacting the contact member. The method of claim 2, The contact member is a hot water heater, characterized in that it is provided with a soft sealing member in contact with the circumference of the hot water inlet to close the hot water inlet. The method according to claim 8 or 9, The sealing member is a water heater, characterized in that made of silicon. Hot water tank for heating and storing the water contained therein; And When the hot water tank is overheated, the hot water inlet through which hot water flows from the hot water tank, an air distribution port through which external air flows, and the air distribution port are installed around the rotating shaft by buoyancy of the hot water introduced from the hot water tank. An expansion tank that rotates to close the air outlet port and includes an on / off valve that rotates about the rotating shaft to open the air outlet port when the introduced hot water returns to the hot water tank; Water heater comprising a. In the expansion tank for water heaters for storing the hot water introduced from the hot water tank when the hot water tank is overheated, A hot water inlet through which hot water flows from the hot water tank; And It is installed in the hot water inlet, and rotates around the rotary shaft by the buoyancy of the hot water introduced from the hot water tank to open the hot water inlet, and when the introduced hot water returns to the hot water tank to rotate around the rotary shaft A first on-off valve for closing the hot water inlet; Expansion tank for water heater comprising a. The method of claim 12, An air distribution port through which outside air flows; And It is installed in the air distribution port, and rotates around the rotary shaft by the buoyancy of hot water introduced from the hot water tank to close the air distribution port, and rotates around the rotary shaft when the introduced hot water is returned to the hot water tank. A second on / off valve for opening the air outlet; Expansion tank for water heater, characterized in that it further comprises.

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