JP2003172549A - Draining hopper and electric water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a draining hopper for preventing expanded water from the upstream side of an open space from overflowing a floor through the open space even in the case where a check valve of the draining hopper is operated to close the open space at its downstream side, and an electric water heater with the draining hopper. <P>SOLUTION: When the water level of a water reserving portion 26 of the draining hopper 11 rises and the check valve 16 rises until it contacts a sealing portion 15, a discharge port opening/closing valve 17 provided in the check valve 16 contacts the sealing portion 19 provided in a discharge port 18 to close a flow path. Thus, the expanded water from the discharge port 18 is prevented from overflowing the floor through the open space 25. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain hopper for flowing expanded water from an electric water heater installed in a washroom or the like into a drain pipe such as a washbasin, and an electric water heater provided with the drain hopper. It is a thing.

[0002]

2. Description of the Related Art A conventional drain hopper of this type is constructed so as to receive expanded water generated by an increase in pressure inside a hot water storage tank when an electric water heater is boiling, and to discharge the expanded water to a drain pipe. . In addition, the drain hopper is used for waste water (drain pipe)
There is an open space inside to prevent backflow to the electric water heater side by cutting the edge with the side. Further, the drain hopper has a built-in check valve so that if the drain pipe is blocked or if a reverse pressure is applied from the drain pipe, the wastewater will not flow back and overflow from the open space.

[0003]

However, in the above-mentioned conventional drainage hopper, when the check valve operates due to the drainage pipe being blocked or the reverse pressure being applied from the drainage pipe,
The downstream side of the open space is closed to prevent backflow from the sewage (drain pipe) side, but in this state, if the expanded water continues to be discharged from the upstream side of the open space, There was a problem that it could overflow the open space and wet the floor.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a check valve of a drainage hopper which is activated to close the downstream side of an open space.
An object of the present invention is to provide a drain hopper and an electric water heater provided with the drain hopper, in which expanded water from the upstream side of the open space does not overflow the open space and wet the floor.

[0005]

[Means for Solving the Problems and Their Actions and Effects] In order to achieve the above-mentioned object, the first aspect of the present invention is to provide a discharge port connected to an expansion water drain pipe of an electric water heater for discharging the expansion water, and from the discharge port. A drainage part that receives the drainage of water, a drainage connection part that connects the drainage from the drainage part to a drainage pipe, and a check to prevent the backflow by blocking the inlet of the reservoir part due to the rise of the water level in the drainage part. In the drainage hopper having a valve, the check valve is provided with a water outlet closing unit that closes the water outlet by increasing the water level in the water reservoir. Therefore, when the check valve operates, the spouting outlet of the expansion water is closed, so that the expansion water does not overflow from the open space of the drain hopper and wet the floor.

According to a second aspect of the present invention, there is provided a prestop type electric water heater including a hot water storage tank having a heater, a water supply pipe for supplying water to the hot water storage tank, and a hot water discharge pipe for discharging hot water from the hot water storage tank. There is provided the drainage hopper according to claim 1, an overpressure relief valve provided in the water supply pipe, and an expansion water drainage pipe that guides inflation water from the overpressure relief valve to the drainage hopper. Therefore, the expansion water from the electric water heater does not overflow the open space of the drain hopper and wet the floor.

According to a third aspect of the present invention, in the electric water heater according to the second aspect, a pressure sensor for detecting the pressure in the water supply pipe is provided, and when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the heater is energized. Decided to shut off. When the discharge port of the expansion water is blocked, the discharge path of the expansion water generated in the hot water storage tank is lost when the heater is activated, and a large pressure may be applied to the hot water storage tank, the water supply pipe, and the hot water discharge pipe, which may cause damage. Therefore, when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the energization of the heater is cut off, so that the hot water storage tank or the like can be prevented from being damaged by the pressure.

According to a fourth aspect of the present invention, there is provided a hot water storage tank equipped with a heater, a water supply pipe for supplying water to the hot water storage tank, and a hot water discharge pipe for discharging hot water from the hot water storage tank. There is a drainage hopper according to claim 1, a solenoid valve provided in the water supply pipe, a cheese joint provided in the hot water outlet pipe, and an expansion water drainage pipe branched from the cheese joint and connected to the drainage hopper. Prepared Therefore, the expansion water from the electric water heater does not overflow the open space of the drain hopper and wet the floor.

According to a fifth aspect, in the electric water heater according to the fourth aspect, the cheese joint is a three-way valve provided with a flow path switching mechanism for guiding the hot water flowing in the hot water outlet pipe to the expanded water drain pipe. It was decided to be. When the discharge port of the expansion water is blocked, the discharge path of the expansion water generated in the hot water storage tank is lost when the heater is activated, and a large pressure may be applied to the hot water storage tank, the water supply pipe, and the hot water discharge pipe, which may cause damage. Therefore, by properly switching the flow path of the three-way valve, it is possible to prevent damage to the hot water storage tank or the like due to the pressure of the expansion water.

According to a sixth aspect of the present invention, in the electric water heater according to the fifth aspect, a pressure sensor for detecting the pressure in the water supply pipe is provided, and when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the hot water pipe and the hot water pipe are provided. The flow path switching mechanism is controlled to cut off the communication of the expansion water drain pipe. Therefore,
When the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the expansion water does not flow to the drain hopper side, so that the hot water storage tank or the like can be prevented from being damaged by the pressure.

According to a seventh aspect, in the electric water heater according to the fifth aspect, a pressure sensor for detecting the pressure in the water supply pipe is provided, and when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the heater is energized. Decided to shut off. Therefore, when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the heater is de-energized, so that the hot water storage tank or the like can be prevented from being damaged by the pressure.

According to an eighth aspect of the present invention, in the electric water heater according to the fourth aspect, the cheese joint is an aspirator that conducts water to the expansion water drain pipe when the flow velocity of the hot water flowing in the hot water discharge pipe is slow. . When the discharge port of the expansion water is blocked, the discharge path of the expansion water generated in the hot water storage tank is lost when the heater is activated, and a large pressure may be applied to the hot water storage tank, the water supply pipe, and the hot water discharge pipe, which may cause damage. Therefore, since the cheese joint is used as an aspirator, when the outlet of the expanded water is blocked, the expanded water can be discharged from the hot water outlet pipe, so that damage to the hot water storage tank or the like due to the pressure of the expanded water can be prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic connection diagram of a drainage hopper 11 showing an embodiment of the present invention.
The expansion water generated when the front stop type electric water heater 1 is heated is made to flow into the drain pipe 13 of the washbasin 12.

As shown in FIG. 1, a first stop type electric water heater 1
Is a hot water storage tank 7, a water supply pipe 3 for supplying water from a water source to the hot water storage tank 7, a pressure reducing valve 2, a heater 4 for heating the supplied water, and hot water in the hot water storage tank 7. A hot water outlet pipe 5 leading to the stopper 6 is provided. Further, the water supply pipe 3 is provided with a pressure sensor 8 for detecting a pressure, and an overpressure relief valve 9 which is activated when the pressure sensor 8 detects a certain pressure or more to release the expanded water and the pressure. The expanded water from the overpressure relief valve 9 is guided to the drain hopper 11 via the expanded water discharge pipe 10. On the other hand, the hot water discharged from the hot water tap 6 toward the washbasin 12 is drained to the drain pipe 13. In addition, the drain pipe 13 is provided on the downstream side of the drain hopper 11.
And discharges the expanded water to the drain pipe 13.

FIG. 2 is a sectional view of the drain hopper 11. The drainage hopper 11 includes a water discharge port 18 and a main body 14, and an open space 25 is provided between the two. Also,
Inside the main body 14, a check valve 16 that moves up and down depending on the water level of the reservoir 26 of the main body 14 is provided. This check valve 16
If the drainage pipe 13 is blocked or a reverse pressure is applied from the drainage pipe 13 and the water level of the water reservoir 26 rises above a certain level, the contact with the seal portion 15 in the main body 14 occurs. It plays a role of blocking the flow path and preventing the situation where water from the drain pipe 13 side overflows from the open space 25 and wets the floor.

Further, the check valve 16 in this embodiment is
As shown in FIG. 2, a water outlet opening / closing valve 17 is provided above. The water spout opening / closing valve 17 is normally located in the open space 25, but when the water level in the water reservoir 26 rises and the check valve 16 rises until it comes into contact with the seal portion 15, the water spout opening / closing valve 17 opens / closes. The valve 17 comes into contact with the seal portion 19 provided on the water discharge port 18 to close the flow path on the water discharge port 18 side. As a result, when the drain pipe 13 is blocked or a reverse pressure is applied from the drain pipe 13 to block the flow path due to the contact between the check valve 16 and the seal portion 15, the flow on the side of the water outlet 18 is simultaneously caused. Since the passage is closed, it is possible to prevent the situation where the expanded water from the water discharge port 18 side, which has lost its place due to the blockage of the flow path at the seal portion 15, overflows from the open space 25 and wets the floor.

However, as described above, the spout opening / closing valve 1
If the heater 7 operates while the hot water tap 6 is closed when 7 contacts the seal portion 19 to block the flow path, the discharge path for the expanded water generated in the hot water storage tank 7 disappears, and the hot water storage tank 7 and the water supply pipe 3 and the hot water discharge pipe 5 may be damaged due to a large pressure. In order to prevent this, when the pressure sensor 8 detects a pressure equal to or higher than a predetermined pressure, the heater 4 is controlled so that the power supply to the heater 4 is cut off. After that, when the drainage pipe 13 is closed or the back pressure is not applied from the drainage pipe 13, the water level of the water reservoir 26 is lowered, and the water outlet opening / closing valve 17
The expanded water is discharged from the seal portion 19, and the pressure in the hot water storage tank 7, the water supply pipe 3, and the hot water discharge pipe 5 is reduced. In this case, the signal from the pressure sensor 8 is controlled to restart the energization of the heater 4. The pressure sensor 8 may be provided not only in the water supply pipe 3 but also in the hot water storage tank 7 or the hot water discharge pipe 5.

FIG. 3 is a schematic connection diagram of the drain hopper 11 showing another embodiment of the present invention.
Is configured to flow the expansion water generated when the main water heater 20 is heated to the drain pipe 13 of the washbasin 12.

As shown in FIG. 3, a main stop type electric water heater 2
Reference numeral 0 indicates a hot water storage tank 7, a water supply pipe 3 for supplying water from a water source to the hot water storage tank 7, a solenoid valve 21, a heater 4 for heating the supplied water, and hot water in the hot water storage tank 7. A hot water outlet pipe 23 leading to an automatic faucet 24 is provided. Hot water pipe 23
A three-way valve 22 having a flow path switching mechanism is provided in the middle of the path, and an expansion water discharge pipe 27 branches from the three-way valve 22 and is connected to the drain hopper 11. On the other hand, the hot water discharged from the automatic faucet 24 toward the washbasin 12 is drained to the drain pipe 13. Further, the downstream side of the drain hopper 11 is connected to the drain pipe 13, and the expanded water is discharged to the drain pipe 13. Further, the water supply pipe 3 has a pressure sensor 8 for detecting pressure.
Equipped with.

In FIG. 3, when a hand is brought close to the automatic water faucet 24, an open signal is sent from the sensor (not shown) of the automatic water faucet 24 to the solenoid valve 21 to open the solenoid valve 21 and the automatic water faucet 2
Hot water comes out from 4. At this time, in the three-way valve 22, the tap pipe 23
And the expanded water discharge pipe 27 are cut off from each other, and hot water does not flow to the drain hopper 11 side. Then, when the automatic faucet 24 is released, a closing signal is sent from the sensor (not shown) of the automatic faucet 24 to the electromagnetic valve 21, the electromagnetic valve 21 is closed, and the water discharge from the automatic faucet 24 is completed. . At this time, in the three-way valve 22, the hot water outlet pipe 23 and the expanded water discharge pipe 27 are switched to communicate with each other, and the expanded water generated by energizing the heater 4 is
Allow it to flow to the drain hopper 11 side.

As described with reference to FIG. 2, the drain hopper 11
The check valve 16 is configured such that the discharge port opening / closing valve 17 comes into contact with the seal portion 19 to block the flow path if the drain pipe 13 is closed or a reverse pressure is applied from the drain pipe 13. ing. When the heater 4 operates in this state, the discharge path for the expansion water generated in the hot water storage tank 7 disappears, and the hot water storage tank 7, the water supply pipe 3, the hot water discharge pipe 23, and the expansion water discharge pipe 27 are removed.
It may be damaged due to the large pressure applied inside. In order to prevent this, when the pressure sensor 8 detects a pressure equal to or higher than a predetermined pressure, the three-way valve 22 is switched so as to cut off the communication between the hot water outlet pipe 23 and the expanded water discharge pipe 27. By doing so, the expanded water is not fed to the drain hopper 11 but to the automatic faucet 24.
Heads out and is discharged from here. After that, when the drain pipe 13 is closed or the back pressure is no longer applied from the drain pipe 13, the three-way valve 22 is switched by the signal from the pressure sensor 8 so that the hot water outlet pipe 23 and the expanded water discharge pipe 27 communicate with each other. The pressure sensor 8 may be provided not only in the water supply pipe 3 but also in the hot water outlet pipe 23 and the hot water storage tank 7 upstream of the three-way valve 22.

In this embodiment, when the water outlet opening / closing valve 17 comes into contact with the seal portion 19 and the flow path is blocked, the expansion water is discharged from the automatic faucet 24.
Expansion water will drip from the automatic faucet 24 even though it is not in use. If you don't like this,
Similar to the embodiment of FIG. 1, control may be performed so that the energization of the heater 4 is cut off when the pressure sensor 8 detects a predetermined pressure or higher.

In place of the three-way valve 22 which is a cheese joint, the automatic faucet 2 is used in the case of normal spouting water flowing at a constant flow rate or more.
In the case of expansion water drainage that flows to the side of 4 and less than that, an aspirator (not shown) having an ejector mechanism that flows to the side of the drain hopper 11 may be used. At this time, when the drainage pipe 13 is closed or a reverse pressure is applied from the drainage pipe 13 and the spout opening / closing valve 17 comes into contact with the seal portion 19 to block the flow path, the expansion water is also filled with the automatic faucet 24. More discharged. In this case, the pressure sensor 8 becomes unnecessary.

In the above embodiment, the drain hopper 11 is combined with an electric water heater, but the present invention is not limited to this, and the drain hopper 11 may be combined with other water heaters that require a drain hopper, such as a gas water heater and an oil water heater. Is also possible.

[Brief description of drawings]

FIG. 1 is a schematic connection diagram of a drain hopper 11 showing an embodiment of the present invention.

FIG. 2 is a sectional view of the drainage hopper 11.

FIG. 3 is a drainage hopper 11 showing another embodiment of the present invention.
Schematic connection diagram of

[Explanation of symbols]

1 ... Stopping type electric water heater 2 ... Pressure reducing valve 3 ... Water supply pipe 4 ... Heater 5… Swimming pipe 6 ... Hot water tap 7 ... Hot water storage tank 8 ... Pressure sensor 9 ... Overpressure relief valve 10 ... Expanded water discharge pipe 11 ... Drainage hopper 12 ... washbasin 13 ... Drainage pipe 14 ... Main body 15 ... Seal part 16 ... Check valve 17 ... Spout valve 18 ... Spout 19 ... Seal part 20 ... Main stop type electric water heater 21 ... Solenoid valve 22 ... Three-way valve 23 ... Hot water pipe 24 ... Automatic faucet 25 ... Open space 26 ... Reservoir part 27 ... Expansion water discharge pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuru Kawaguchi             43-1, Uozakihama, Higashinada-ku, Kobe-shi, Hyogo Japan             Within Yupro Corporation F-term (reference) 2D061 BG04 BG10                 3H058 AA03 BB28 CC01 CD29 DD13                       DD17 EE02

Claims (8)

[Claims] 1. A water spout connected to an expansion water drain of an electric water heater to drain the expansion water, a reservoir for receiving drainage from the spout, and drain from the reservoir connected to the drain. In a drainage hopper provided with a drainage connection part that does, and a check valve that closes the inlet of the reservoir part by the rise of the water level in the reservoir part and prevents a backflow, in the check valve, the water level in the reservoir part A drainage hopper provided with a spout closing means for closing the spout by rising. 2. A front stop type electric water heater comprising: a hot water storage tank having a heater; a water supply pipe for supplying water to the hot water storage tank; and a hot water discharge pipe for discharging hot water from the hot water storage tank.
The drainage hopper according to claim 1, an overpressure relief valve provided in the water supply pipe, and an expansion water drainage pipe for guiding expansion water from the overpressure relief valve to the drainage hopper. Electric water heater. 3. A pressure sensor for detecting the pressure in the water supply pipe, wherein when the pressure sensor detects a pressure equal to or higher than a predetermined pressure, the energization of the heater is cut off. Electric water heater. 4. A main-stop type electric water heater comprising a hot water storage tank equipped with a heater, a water supply pipe for supplying water to the hot water storage tank, and a hot water discharge pipe for discharging hot water from the hot water storage tank.
The drainage hopper according to claim 1, an electromagnetic valve provided in the water supply pipe, a cheese joint provided in the hot water outlet pipe, and an expansion water drainage pipe branched from the cheese joint and connected to the drainage hopper. An electric water heater characterized by. 5. The electric machine according to claim 4, wherein the cheese joint is a three-way valve having a flow path switching mechanism for guiding hot water flowing in the hot water outlet pipe to the expanded water drain pipe. Water heater. 6. A flow sensor provided with a pressure sensor for detecting a pressure in the water supply pipe, wherein the flow passage switching is performed so as to cut off communication between the hot water pipe and the expansion water drain pipe when the pressure sensor detects a pressure equal to or higher than a predetermined pressure. The electric water heater according to claim 5, which controls a mechanism. 7. The pressure sensor according to claim 5, further comprising a pressure sensor for detecting the pressure in the water supply pipe, wherein the heater is turned off when the pressure sensor detects a pressure equal to or higher than a predetermined pressure. Electric water heater. 8. The electric water heater according to claim 4, wherein the cheese joint is an aspirator that conducts water to the expansion water drain pipe when the flow velocity of the hot water flowing in the hot water discharge pipe is slow.