JP2013213615A - Main stop-system electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main stop-system electric water heater which suppresses effect of a front end pressure loss of a water faucet and a difference of discharge flow rates, and suppresses necessity of having many different kinds of expansion water processing joints.SOLUTION: A main stop-system electric water heater includes: an opening/closing valve; a tank; and an expansion water processing joint having a first internal flow channel in which hot water supplied from the tank flows, a second internal flow channel in which the hot water from the first internal flow channel is guided to a side of a water discharge part of discharging water to an external, and a third internal flow channel in which the hot water from the first internal flow channel is guided to a side of a drain hopper of draining to a drain pipe. The expansion water processing joint closes the third internal flow channel by energizing a flow of the hot water when a flow rate of the hot water flowing in the first internal flow channel is higher than a predetermined flow rate, and opens the third internal flow channel when the flow rate of the hot water flowing in the first internal flow channel is lower than the predetermined flow rate.

Description

  Aspects of the present invention generally relate to a pre-stop electric water heater.

  Generally, an electric water heater with a stoppage has a structure in which water is stored in a tank and heated. Therefore, in the former type electric water heater, expanded water is generated by expansion of the volume of water due to heating. Inflated water drops from the faucet. Therefore, the user may misunderstand that the expanded water dripping from the faucet is a water leak.

  On the other hand, for example, there is a cheese joint that is an aspirator that guides water to a branch pipe when the flow rate of water flowing in the pipe is slow in the middle of the pipe connecting the water discharge part of the main water heater and the faucet. There is a former stop type electric water heater system provided (Patent Document 1). The aspirator of the main-stop type electric water heater system described in Patent Document 1 guides water to the drain hopper side or the automatic faucet side according to the flow rate of hot water or water flowing in the aspirator. That is, water having a slow flow rate in the aspirator, such as expanded water, is guided to the flow path on the drain hopper side and drained to the drain pipe. On the other hand, water having a high flow velocity in the aspirator, such as water at the time of general water discharge, is guided to the automatic faucet side by the ejector effect.

  However, in the main-stop electric water heater system described in Patent Document 1, the flow rate of water discharged from the automatic faucet varies depending on the automatic faucet to be combined. Therefore, when the flow rate is relatively slow, there is room for improvement in that the amount of water guided to the drain hopper side is relatively large even when water is discharged from the automatic faucet. In addition, the automatic faucet is designed according to the customer's request, and the tip pressure loss and water discharge flow rate are changed in consideration of the customer's usage, so there is a difference in the tip pressure loss and water discharge flow rate of the automatic faucet. is there. Therefore, there is room for improvement in that it is necessary to stock several types of aspirators according to the automatic faucet.

JP 2003-130469 A

  The present invention has been made on the basis of recognition of such a problem, and can suppress the influence of the tip pressure loss of the faucet and the difference in the water discharge flow rate, and can suppress the necessity of assembling various kinds of expansion water treatment joints. An object is to provide an electric water heater with a stop.

  According to a first aspect of the present invention, there is provided an on-off valve for switching between supply and stop of water, a tank for storing and heating water supplied via the on-off valve, and a first internal flow through which hot water supplied from the tank flows. A drainage hopper for draining hot water from the first internal flow path to a drain pipe, a second internal flow path for guiding the hot water from the first internal flow path to a water discharger side An expansion water treatment joint having a third internal flow path leading to the first flow path, wherein the expansion water treatment joint has a flow rate of hot water flowing through the first internal flow path higher than a predetermined flow rate. The third internal channel is closed by energizing the flow of hot water, and the third internal channel is opened when the flow rate of the hot water flowing through the first internal channel is slower than a predetermined flow rate. A non-stop type electric water heater having an internal channel opening / closing means.

  According to this stop-type electric water heater, the internal flow path opening / closing means opens and closes the third internal flow path that guides the hot water to the drain hopper side using the flow of hot water in the internal flow path. Therefore, it is possible to suppress the influence due to the tip pressure loss of the faucet and the difference in the discharged water flow rate, and to suppress the necessity of assembling various types of expansion water treatment joints.

  According to a second aspect of the present invention, in the first aspect of the invention, the internal flow path opening / closing means opens the third internal flow path by its own weight.

  According to this main-stop electric water heater, when the flow rate of the hot water flowing through the first internal flow path becomes lower than the predetermined flow rate, the internal flow path opening / closing means has the third internal flow path by its own weight. open. Therefore, the structure for opening and closing the third internal flow path by the internal flow path opening / closing means can be further simplified.

  Further, according to a third aspect of the present invention, in the first or second aspect, the extending direction of the first internal flow path is parallel to the extending direction of the third internal flow path, and the internal flow path The opening / closing means is provided between the first internal flow path and the third internal flow path. The direction in which hot water flows through the first internal flow path is determined by the internal flow path opening / closing means being the third internal flow path. It is a main stop type electric water heater characterized by being parallel to the direction energized by the flow of hot water when closing the internal flow path.

  According to this main-stop electric water heater, the direction in which the hot water flows through the first internal flow path is the direction in which the internal flow path opening / closing means is energized by the flow of hot water when closing the third internal flow path. Parallel. Therefore, the internal channel opening / closing means can more reliably close the third internal channel.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the internal flow path opening / closing means has a rotatable spherical shape.

  According to this stop-type electric water heater, the internal flow path opening / closing means has a rotatable spherical shape, and therefore is relatively easy to rotate when hot water flows. Therefore, the internal channel opening / closing means can relatively easily open and close the third internal channel. Therefore, it is possible to suppress the occurrence of problems in the opening / closing operation of the internal channel opening / closing means.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the internal flow path opening / closing means has a recess formed in the spherical surface.

  According to this main-stop type electric water heater, when the flow rate of the hot water flowing through the first internal flow path is slow compared with the case where no recess is formed, the internal flow path opening / closing means and the internal flow path A gap is easily formed between the inner wall and the inner wall. Thereby, it can suppress that an internal flow-path opening-and-closing means will be in the state which has closed the 3rd internal flow path.

  According to a sixth aspect of the present invention, in the fourth or fifth aspect, the expansion water treatment joint is configured to open and close the internal flow path when the flow rate of the hot water flowing through the first internal flow path is slower than a predetermined flow rate. A non-removable electric water heater having a channel recess for receiving means.

  According to this primary electric water heater, when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate, the internal channel opening / closing means is prevented from freely moving in the internal channel. Can do. Thereby, the internal channel opening / closing means can more reliably open the third internal channel when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate. In other words, when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate, the internal channel opening / closing means can be prevented from being in a state of closing the third internal channel. .

  According to a seventh aspect, in the fourth or fifth aspect, the expansion water treatment joint has an inclined surface that is inclined downward as it goes from the third internal flow path to the first internal flow path. This is a non-stop type electric water heater characterized by that.

  According to this main-stop type electric water heater, since the expansion water treatment joint has an inclined surface inclined downward as it goes from the third internal flow path to the first internal flow path, The force is received in the direction from the three internal flow paths toward the first internal flow path. Therefore, when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate, the internal channel opening / closing means rotates on the inclined surface and moves to the first internal channel side. Thereby, the internal channel opening / closing means can more reliably open the third internal channel when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate. In other words, when the flow rate of the hot water flowing through the first internal channel is slower than the predetermined flow rate, the internal channel opening / closing means can be prevented from being in a state of closing the third internal channel. .

  Further, according to an eighth invention, in any one of the first to third inventions, the expansion water treatment joint is connected to a weight portion biased by a flow of hot water and the weight portion, and the third An electric water heater according to claim 1, comprising a plate portion capable of closing the internal flow path, and a support shaft for pivotally supporting the plate portion.

  According to this main-stop electric water heater, even when the flow rate of hot water flowing through the first internal flow path suddenly increases, the momentum of the hot water flow is directly transmitted to the weight portion. Therefore, even when the flow rate of hot water flowing through the first internal flow path suddenly increases, the internal flow path opening / closing means can rotate more reliably around the support shaft. And a board part can block the 3rd internal channel more certainly. That is, the internal channel opening / closing means can more reliably close the third internal channel.

  According to a ninth invention, in the first or second invention, the expansion water treatment joint has a cylindrical shape and is erected on a bottom surface portion urged by a flow of hot water and a peripheral portion of the bottom surface portion. And a side-stop portion capable of closing the third internal flow path.

  According to this primary stop electric water heater, even when the flow of the hot water in the first internal flow path swirls and a force in the rotational direction is applied to the internal flow path opening / closing means, the internal flow path opening / closing means Can move in the direction. Therefore, the internal channel opening / closing means can more reliably close the third internal channel.

  According to the aspect of the present invention, there is provided a non-stop type electric water heater that can suppress the influence due to the tip pressure loss of the faucet and the difference in the discharged water flow rate, and can suppress the necessity of assorting various types of expansion water treatment joints. The

It is a block diagram showing the principal part structure of the former stop | fastening type electric water heater concerning embodiment of this invention. It is typical sectional drawing which illustrates the example of the expansion water treatment joint of this embodiment. It is typical sectional drawing which illustrates the example of the expansion water treatment joint of this embodiment. It is a typical sectional view which illustrates the internal channel opening-and-closing means of this example. It is a typical sectional view which illustrates other internal channel opening-and-closing means of this example. It is typical sectional drawing which illustrates the other specific example of the expansion water processing joint of this embodiment. It is typical sectional drawing which illustrates the other specific example of the expansion water processing joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. FIG. 6 is a schematic cross-sectional view illustrating still another specific example of the expanded water treatment joint of this embodiment. It is a typical perspective view which illustrates the internal channel opening-and-closing means of this example.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a block diagram showing a main configuration of a main-stop electric water heater according to an embodiment of the present invention.
In addition, FIG. 1 represents together the principal part structure of the waterway system and the electrical system.

  The former stop type electric water heater 100 according to the present embodiment includes an on-off valve 110, a tank 120, and an expansion water treatment joint 130. The on-off valve 110 switches between supply and stop of water supplied through the water supply pipe 101 to the tank 120. The tank 120 is connected to the water supply pipe 101 and stores water supplied via the on-off valve 110. A heater 121 is provided inside the tank 120. The heater 121 can heat the water stored in the tank 120 into hot water (hot water).

  The expanded water treatment joint 130 is provided on the downstream side of the tank 120. A water discharge pipe 103 is provided between the tank 120 and the expansion water treatment joint 130. The outlet pipe 103 can guide the hot water supplied from the tank 120 to the expansion water treatment joint 130.

  The expanded water treatment joint 130 includes a first internal channel 131, a second internal channel 132, and a third internal channel 133. The first internal flow path 131 can guide hot water supplied from the tank 120 through the drain pipe 103 to the second internal flow path 132 or the third internal flow path 133. The second internal channel 132 can guide hot water supplied through the first internal channel 131 to the faucet (water discharger) 210 attached to the wash basin 220. A faucet connection pipe 105 is provided between the expansion water treatment joint 130 and the faucet 210. The faucet connecting pipe 105 can guide hot water supplied from the expansion water treatment joint 130 to the faucet 210.

  The third internal flow path 133 can guide hot water supplied through the first internal flow path 131 to the drain hopper 140 side. A drainage connection pipe 107 is provided between the expansion water treatment joint 130 and the drainage hopper 140. The drainage connection pipe 107 can guide hot water supplied from the expansion water treatment joint 130 to the drainage hopper 140.

  The drain hopper 140 has a drain trap 141 connected to the drain pipe 109 and prevents, for example, bad odors and insects from entering the room from the drain pipe 109.

In addition, the primary electric water heater 100 according to the present embodiment includes a control unit 160. The controller 160 controls the opening / closing operation of the opening / closing valve 110 based on a signal transmitted from the sensor 211 provided in the faucet 210 via the sensor code 212.
When the user holds his hand over the sensor 211, the control unit 160 opens the on-off valve 110 based on a signal transmitted from the sensor 211 and discharges hot water from the faucet 210. On the other hand, when the sensor 211 no longer detects the user's hand due to the end of hand washing or the like, the control unit 160 closes the on-off valve 110 based on a signal transmitted from the sensor 211 and discharges hot water from the faucet 210. Stop.

  Furthermore, an internal channel opening / closing means 135 is provided inside the expansion water treatment joint 130. When the flow rate of the hot water flowing through the first internal flow channel 131 is faster than a predetermined flow rate, the internal flow channel opening / closing means 135 closes the third internal flow channel 133 by energizing the flow of hot water. On the other hand, the internal channel opening / closing means 135 opens the third internal channel 133 when the flow rate of the hot water flowing through the first internal channel 131 is slower than a predetermined flow rate.

  According to this, the internal flow path opening / closing means 135 opens and closes the third internal flow path that guides the hot water to the drain hopper 140 side using the flow of hot water in the internal flow path. Therefore, it is possible to suppress the influence of the tip pressure loss of the faucet 210 and the difference in the discharged water flow rate, and to suppress the necessity of assembling various types of the expansion water treatment joints 130.

  Moreover, the expansion water treatment joint 130 of this embodiment makes the internal flow path of the expansion water treatment joint 130 and the inside of the faucet connection pipe 105 empty after the discharge of hot water from the faucet 210 is stopped. Can do. Therefore, when the hot water is discharged again after a lapse of time after the hot water discharge is stopped, the hot water can be discharged immediately from the faucet 210. Thereby, it can suppress giving a user discomfort by cold water coming out of the faucet 210 first.

Next, a specific example of the expanded water treatment joint 130 of the present embodiment will be described with reference to the drawings.
2 and 3 are schematic cross-sectional views illustrating specific examples of the expanded water treatment joint of this embodiment.
FIG. 4 is a schematic cross-sectional view illustrating the internal channel opening / closing means of this example.
FIG. 5 is a schematic cross-sectional view illustrating another internal channel opening / closing means of this example.
FIG. 2 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means closes the third internal channel. FIG. 3 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means opens the third internal channel.

As shown in FIG. 2 and FIG. 3, the internal channel opening / closing means 135 a of this specific example is inside the expansion water treatment joint 130 a, and includes the first internal channel 131, the third internal channel 133, and the like. It is provided between. As shown in FIG. 4, the internal channel opening / closing means 135a has a spherical shape and has a recess 136a on the surface thereof. Alternatively, as shown in FIG. 5, the internal channel opening / closing means 135 a has a spherical shape and has a convex portion 136 b on the surface thereof.
In addition, a seal member 139 such as an O-ring formed of an elastic body is provided on the upstream side of the third internal channel 133.

  When the flow rate of the hot water flowing through the first internal channel 131 is higher than a predetermined flow rate as in general water discharge, the momentum of the hot water flow is relatively strong. Therefore, as shown in FIG. 2, the internal flow path opening / closing means 135 a is pushed toward the seal member 139 with the momentum of the hot water flow. The internal channel opening / closing means 135a is pressed against the seal member 139 and is in close contact with the seal member 139. Thereby, the internal flow path opening / closing means 135a closes the third internal flow path 133. For this reason, hot water having a flow rate higher than a predetermined flow rate, such as general hot water at the time of water discharge, is represented by the first internal flow path 131 and the second internal flow as indicated by arrows A1 and A2 shown in FIG. The water passes through the passage 132 and is discharged from the faucet 210.

  On the other hand, if the flow rate of the hot water flowing through the first internal channel 131 becomes slower than the predetermined flow rate due to, for example, the end of hand washing, the momentum of the hot water flow becomes relatively weak. That is, when the flow rate of the hot water flowing through the first internal channel 131 is slower than the predetermined flow rate as in the case where the expanded water flows, the momentum of the hot water flow is relatively weak. Therefore, as shown in FIG. 3, the internal flow path opening / closing means 135 a moves away from the seal member 139 due to its own weight and moves toward the first internal flow path 131. Thereby, the internal flow path opening / closing means 135a opens the third internal flow path 133. Therefore, hot water having a flow rate slower than a predetermined flow rate, such as expanded water, passes through the first internal channel 131 and the third internal channel 133 as indicated by arrows A1 and A3 shown in FIG. The water is drained to the drain pipe 109 through the drain hopper 140.

  According to this specific example, the extending direction of the first internal channel 131 is substantially parallel to the extending direction of the third internal channel 133. The direction in which the hot water flows through the first internal channel 131 (see arrow A1) is substantially the same as the direction in which the internal channel opening / closing means 135a is energized by the hot water flow when closing the third internal channel 133. Parallel. Therefore, the internal flow path opening / closing means 135a can more reliably close the third internal flow path 133.

  Further, the internal channel opening / closing means 135a of this specific example has a spherical shape that can rotate in the internal channel. Therefore, the internal channel opening / closing means 135a is relatively easy to rotate when hot water flows. Thereby, the internal flow path opening / closing means 135a is relatively easy to open and close the third internal flow path 133. Therefore, it is possible to suppress the occurrence of problems in the opening / closing operation of the internal channel opening / closing means 135a.

  Further, as described above, the internal channel opening / closing means 135a has the concave portion 136a or the convex portion 136b on the surface thereof. Therefore, compared to the case where the concave portion 136a and the convex portion 136b are not formed, when the flow rate of the hot water flowing through the first internal flow passage 131 becomes slow, the internal flow passage opening / closing means 135a and the inner wall of the internal flow passage Or a gap is easily generated between the internal channel opening / closing means 135a and the seal member 139. Thereby, it can suppress that the internal flow-path opening-and-closing means 135a will be in the state which has closed the 3rd internal flow path 133. FIG.

  Further, in this specific example, in a state where the internal flow path opening / closing means 135 a closes the third internal flow path 133, the internal flow path opening / closing means 135 a is the third internal flow path of the second internal flow path 132. It is located on the third internal flow path 133 side with respect to the extension line of the inner wall 132a on the 133 side (see the two-dot chain line shown in FIG. 2). Thereby, when hot water passes the 1st internal flow path 131 and the 2nd internal flow path 132, it can suppress that the internal flow path opening / closing means 135a vibrates.

6 and 7 are schematic cross-sectional views illustrating other specific examples of the expanded water treatment joint of this embodiment.
FIG. 6 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means closes the third internal channel. FIG. 7 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means opens the third internal channel.

  As shown in FIGS. 6 and 7, the expanded water treatment joint 130b of the present specific example includes the first internal flow path 133 to the first flow path at the bottom of the internal flow path provided with the internal flow path opening / closing means 135a. An inclined surface 137b that is inclined downward toward the internal flow path 131 is formed. Other structures of the expanded water treatment joint 130b and the internal flow path opening / closing means 135a are the same as the structures of the expanded water treatment joint 130a and the internal flow path opening / closing means 135a described above with reference to FIGS. However, the internal channel opening / closing means 135a of this specific example does not necessarily have the concave portion 136a or the convex portion 136b.

  In the expanded water treatment joint 130b of this specific example, since the inclined surface 137b is formed at the bottom of the internal flow path provided with the internal flow path opening / closing means 135a, the internal flow path opening / closing means 135a is connected to the third internal flow opening / closing means 135a. A force is applied in a direction from the path 133 toward the first internal flow path 131. Therefore, when the flow rate of the hot water flowing through the first internal channel 131 is faster than a predetermined flow rate, as in general water discharge, the internal channel opening / closing means as indicated by an arrow A4 shown in FIG. 135a is pushed to the seal member 139 side by the momentum of the hot water flow against the force received from the inclined surface 137b. The internal channel opening / closing means 135a is pressed against the seal member 139 and is in close contact with the seal member 139. Thereby, the internal flow path opening / closing means 135a closes the third internal flow path 133. For this reason, hot water having a flow rate higher than a predetermined flow rate, such as general hot water at the time of water discharge, has the first internal flow path 131 and the second internal flow as indicated by arrows A1 and A2 shown in FIG. The water passes through the passage 132 and is discharged from the faucet 210.

  On the other hand, when the flow rate of the hot water flowing through the first internal channel 131 is slower than a predetermined flow rate, such as when the expanded water flows, the internal channel opening / closing means as indicated by an arrow A5 shown in FIG. 135a separates from the seal member 139 by its own weight, rotates on the inclined surface 137b, and moves to the first internal flow path 131 side.

  Thereby, the internal flow path opening / closing means 135a can more reliably open the third internal flow path 133 when the flow rate of the hot water flowing through the first internal flow path 131 is slower than the predetermined flow rate. In other words, when the flow rate of the hot water flowing through the first internal flow path 131 is slower than the predetermined flow rate, the internal flow path opening / closing means 135a is prevented from remaining in the state where the third internal flow path 133 remains closed. be able to.

Then, hot water having a flow rate slower than a predetermined flow rate, such as expanded water, passes through the first internal flow path 131 and the third internal flow path 133 as indicated by arrows A1 and A6 shown in FIG. The water is drained to the drain pipe 109 through the drain hopper 140.
Moreover, the effect similar to the expansion water treatment joint 130a mentioned above regarding FIGS. 2-5 is acquired.

8 and 9 are schematic cross-sectional views illustrating still other specific examples of the expanded water treatment joint of this embodiment.
FIG. 8 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means closes the third internal channel. FIG. 9 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means opens the third internal channel.

  As shown in FIGS. 8 and 9, the expanded water treatment joint 130 c of this specific example can insert the internal flow path opening / closing means 135 b at the bottom of the internal flow path where the internal flow path opening / closing means 135 b is provided. Or the flow path recessed part 137c which can be received is formed. Further, the concave portion 136a and the convex portion 136b are not formed on the surface of the internal channel opening / closing means 135b of this specific example. Other structures of the expanded water treatment joint 130c and the internal flow path opening / closing means 135b are the same as the structures of the expanded water treatment joint 130a and the internal flow path opening / closing means 135a described above with reference to FIGS.

  In the expanded water treatment joint 130c of this specific example, a channel recess 137c is formed at the bottom of the internal channel provided with the internal channel opening / closing means 135b. Therefore, as shown in FIG. 8, when the flow rate of the hot water flowing through the first internal flow path 131 is higher than a predetermined flow rate as in general water discharge, the internal flow path opening / closing means 135b is It is pulled out of the flow path recess 137c with the momentum of the hot water flow and pushed toward the seal member 139. The internal channel opening / closing means 135b is pressed against the seal member 139 and is in close contact with the seal member 139. Thereby, the internal flow path opening / closing means 135b closes the third internal flow path 133. For this reason, hot water having a flow rate higher than a predetermined flow rate, such as general hot water at the time of water discharge, is represented by the first internal flow path 131 and the second internal flow as indicated by arrows A1 and A2 shown in FIG. The water passes through the passage 132 and is discharged from the faucet 210.

  On the other hand, as shown in FIG. 9, when the flow rate of the hot water flowing through the first internal flow path 131 is slower than the predetermined flow rate, as in the case where the expanded water flows, the internal flow path opening / closing means 135b is It is separated from the seal member 139 by its own weight, falls into the channel recess 137c, and is substantially held. Therefore, when the flow rate of the hot water flowing through the first internal flow channel 131 is slower than the predetermined flow rate, the internal flow channel opening / closing means 135b can be prevented from freely moving in the internal flow channel.

  As a result, the internal channel opening / closing means 135b can more reliably open the third internal channel 133 when the flow rate of the hot water flowing through the first internal channel 131 is slower than the predetermined flow rate. In other words, when the flow rate of the hot water flowing through the first internal channel 131 is slower than the predetermined flow rate, the internal channel opening / closing means 135b is prevented from remaining in the state where the third internal channel 133 is closed. be able to.

Then, the hot water having a flow rate slower than the predetermined flow rate, such as the expanded water, passes through the first internal flow path 131 and the third internal flow path 133 as indicated by arrows A1 and A7 shown in FIG. The water is drained to the drain pipe 109 through the drain hopper 140.
Moreover, the effect similar to the expansion water treatment joint 130a mentioned above regarding FIGS. 2-5 is acquired.

10 and 11 are schematic cross-sectional views illustrating still other specific examples of the expanded water treatment joint of this embodiment.
FIG. 10 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means closes the third internal channel. FIG. 11 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means opens the third internal channel.

  The internal channel opening / closing means 135c of this specific example includes a weight portion 136c, a plate portion 136d, and a support shaft 136e. As shown in FIGS. 10 and 11, the weight portion 136c is connected to one end portion of the plate portion 136d. The plate part 136d of the internal flow path opening / closing means 135c is pivotally supported by the internal flow path of the expansion water treatment joint 130d on the support shaft 136e, and can rotate about the support shaft 136e.

  As shown in FIG. 11, when the flow rate of the hot water flowing through the first internal channel 131 is slower than a predetermined flow rate, such as when the expanded water flows, the weight portion 136c of the internal channel opening / closing means 135c. Is positioned below the support shaft 136e due to its own weight. At this time, a gap exists between the weight portion 136c and the inner wall of the internal flow path. Thereby, the internal flow path opening / closing means 135c opens the third internal flow path 133. Therefore, hot water having a flow rate slower than a predetermined flow rate, such as expanded water, passes through the first internal flow path 131 and the third internal flow path 133 as indicated by an arrow A10 shown in FIG. Drained to the drain pipe 109 via 140.

  On the other hand, when the flow rate of the hot water flowing through the first internal channel 131 is higher than a predetermined flow rate as in general water discharge, the weight portion 136c receives the momentum of the hot water flow. As a result, the internal channel opening / closing means 135c rotates about the support shaft 136e substantially as shown by an arrow A11 shown in FIG. Then, as shown in FIG. 10, the plate portion 136 d closes the third internal flow path 133. Thereby, the internal flow path opening / closing means 135c closes the third internal flow path 133. For this reason, hot water having a flow rate higher than a predetermined flow rate, such as hot water at the time of general water discharge, causes the first internal flow path 131 and the second internal flow path 132 to pass through as indicated by an arrow A9 shown in FIG. The water passes through and is discharged from the faucet 210.

  According to this specific example, even when the flow rate of the hot water flowing through the first internal channel 131 suddenly increases, the momentum of the hot water flow is directly transmitted to the weight portion 136c. Therefore, even when the flow rate of the hot water flowing through the first internal flow path 131 suddenly increases, the internal flow path opening / closing means 135c can rotate more reliably about the support shaft 136e. The plate portion 136d can more reliably block the third internal flow path 133. That is, the internal flow path opening / closing means 135c can more reliably close the third internal flow path 133.

12 and 13 are schematic cross-sectional views illustrating still another specific example of the expanded water treatment joint of this embodiment.
FIG. 14 is a schematic perspective view illustrating the internal channel opening / closing means of this example.
FIG. 12 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means closes the third internal channel. FIG. 13 is a schematic cross-sectional view showing a state in which the internal channel opening / closing means opens the third internal channel.

  As shown in FIGS. 12 and 13, the internal channel opening / closing means 135d of this specific example is provided inside the expansion water treatment joint 130e, and is movable in the vertical direction in the internal flow channel of the expansion water treatment joint 130e. is there. As shown in FIG. 14, the internal channel opening / closing means 135d has a cylindrical shape, and includes a bottom surface portion 136f and a side surface portion 136h erected on the peripheral edge portion of the bottom surface portion 136f. A through-hole 136g that penetrates the bottom surface portion 136f is formed in the bottom surface portion 136f. The side surface portion 136h can close the third internal flow path 133.

  As shown in FIG. 13, when the flow rate of hot water flowing through the first internal flow path 131 is slower than a predetermined flow rate as in the case where the expansion water flows, the internal flow path opening / closing means 135d It is located below the third internal flow path 133. Thereby, the internal flow path opening / closing means 135d opens the third internal flow path 133. Therefore, hot water having a flow rate slower than a predetermined flow rate, such as expanded water, as shown by an arrow A13 in FIG. 13, the first internal channel 131, the through-hole 136g of the internal channel opening / closing means 135d, and the first 3 passes through the internal flow path 133 and is drained to the drain pipe 109 via the drain hopper 140.

  On the other hand, when the flow rate of the hot water flowing through the first internal channel 131 is higher than a predetermined flow rate, such as during general water discharge, the bottom surface portion 136f of the internal channel opening / closing means 135d causes the flow of hot water to flow. Receive. As a result, the internal channel opening / closing means 135d moves upward as indicated by an arrow A14 shown in FIG. Then, as illustrated in FIG. 12, the side surface portion 136 h of the internal channel opening / closing means 135 d closes the third internal channel 133. Thereby, the internal channel opening / closing means 135d closes the third internal channel 133. Therefore, hot water having a flow rate higher than a predetermined flow rate, such as hot water at the time of general water discharge, penetrates through the first internal channel 131 and the internal channel opening / closing means 135d as indicated by an arrow A12 shown in FIG. The water passes through the hole 136g and the second internal flow path 132, and is discharged from the faucet 210.

  According to this specific example, even when the flow of hot water in the first internal flow path 131 is swirled and a force in the rotational direction is applied to the internal flow path opening / closing means 135d, the internal flow path opening / closing means 135d Can be moved to. Therefore, the internal channel opening / closing means 135d can close the third internal channel 133 more reliably.

  In this specific example, a biasing means such as a “spring” for biasing the internal channel opening / closing means 135d upward may be provided below the internal channel opening / closing means 135d. According to this, even if the internal channel opening / closing means 135d is difficult to move in the vertical direction due to, for example, water scale, the urging means urges the internal channel opening / closing means 135d upward, and the third internal channel opening / closing means 135 133 can be closed more reliably.

  Alternatively, a biasing means such as a “spring” for biasing the internal flow path opening / closing means 135d downward may be provided above the internal flow path opening / closing means 135d. According to this, even if the internal channel opening / closing means 135d is difficult to move in the vertical direction due to, for example, water scale, the urging means urges the internal channel opening / closing means 135d downward, and the third internal channel opening / closing means 135d. 133 can be opened more reliably.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, dimensions, material, arrangement, etc. of each element included in the main-stop type electric water heater 100 and the expansion water treatment joints 130, 130a to 130e, and the installation forms of the internal channel opening / closing means 135, 135a to 135d are It is not necessarily limited to what was illustrated and can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  100 water stop type electric water heater, 101 water supply pipe, 103 water discharge pipe, 105 faucet connection pipe, 107 drainage connection pipe, 109 drainage pipe, 110 on-off valve, 120 tank, 121 heater, 130, 130a, 130b, 130c, 130d , 130e expansion water treatment joint, 131 first internal flow path, 132 second internal flow path, 132a inner wall, 133 third internal flow path, 135, 135a, 135b, 135c, 135d internal flow path opening / closing means, 136a Recessed portion, 136b Protruding portion, 136c Weight portion, 136d Plate portion, 136e Support shaft, 136f Bottom surface portion, 136g Through hole, 136h Side surface portion, 137b Inclined surface, 137c Channel recess portion, 139 Seal member, 140 Drainage hopper, 141 Drainage trap , 160 control unit, 210 faucet, 2 1 sensor, 212 sensor cord, 220 washbasin

Claims (9)

An on-off valve that switches between water supply and stop,
A tank for storing and heating water supplied through the on-off valve;
A first internal flow path through which hot water supplied from the tank flows, a second internal flow path for guiding the hot water from the first internal flow path to the side of the water discharger, and the first A third internal flow path for guiding the hot water from the internal flow path to a drain hopper for draining the drain pipe to the drain pipe;
With
The expansion water treatment joint closes the third internal flow path by energizing the flow of hot water when the flow rate of the hot water flowing through the first internal flow path is higher than a predetermined flow speed, An electric water heater according to claim 1, further comprising an internal channel opening / closing means for opening the third internal channel when the flow rate of the hot water flowing through the internal channel is slower than a predetermined flow rate.   2. The main-stop electric water heater according to claim 1, wherein the internal flow path opening / closing means opens the third internal flow path by its own weight. The extending direction of the first internal flow path is parallel to the extending direction of the third internal flow path,
The internal channel opening / closing means is provided between the first internal channel and the third internal channel,
The direction in which hot water flows through the first internal flow path is parallel to the direction in which the internal flow path opening / closing means is urged by the flow of hot water when closing the third internal flow path. The primary electric water heater according to claim 1 or 2.   The said internal flow path opening-and-closing means exhibits the spherical shape which can rotate, The former stop type electric water heater of Claim 3 characterized by the above-mentioned.   The said internal flow-path opening-and-closing means has a recessed part formed in the said spherical shaped surface, The former stop type | formula electric water heater of Claim 4 characterized by the above-mentioned.   5. The expansion water treatment joint according to claim 4, further comprising a channel recess that receives the internal channel opening / closing means when a flow rate of hot water flowing through the first internal channel is slower than a predetermined flow rate. 5. A water-stop electric water heater according to 5.   The said expansion water treatment joint has an inclined surface which inclines below as it goes to the said 1st internal flow path from the said 3rd internal flow path, The stop | fastening type | formula electricity of Claim 4 or 5 characterized by the above-mentioned. Water heater.   The expansion water treatment joint includes a weight portion biased by a flow of hot water, a plate portion connected to the weight portion and capable of closing the third internal flow path, and the plate portion pivotally supported. The stop-type electric water heater according to any one of claims 1 to 3, further comprising a support shaft.   The expanded water treatment joint has a cylindrical shape, and includes a bottom surface portion that is urged by a flow of hot water, and a side surface portion that stands on a peripheral edge portion of the bottom surface portion and can close the third internal flow path. The main-stop electric water heater according to claim 1 or 2, characterized by comprising:

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