JP7009975B2 - Hot water storage type electric water heater - Google Patents

Description

The present invention relates to a hot water storage type electric water heater that discharges stored hot water.

As a hot water storage type electric water heater for supplying appropriate hot water to a faucet installed in a hand-washing device or the like, the one described in Patent Document 1 below has been proposed. In the hot water storage type electric water heater described in Patent Document 1 below, water supplied from a water supply source is once stored in a hot water storage tank through a check valve portion and a pressure reducing valve. In the hot water storage tank, the supplied water is heated by an electric heater, the heated hot water passes through a hot water outlet pipe, and water mixed at an appropriate temperature by a hot water mixing means is discharged from a faucet.

Japanese Unexamined Patent Publication No. 2014-178874

In the hot water storage type electric water heater described in Patent Document 1, the check valve portion and the pressure reducing valve are integrated as a valve unit, and the check valve portion and the valve unit of the pressure reducing valve are arranged by a relatively large pressure reducing valve. Restrictions will occur, and the size of the hot water storage type electric water heater will increase. Since the hot water storage type electric water heater is located below the hand-washing device, if the hot water storage type electric water heater becomes large, the feet of the wheelchair user will come into contact with the hot water storage type electric water heater, so it is necessary to reduce the size. There is.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a small hot water storage type electric water heater by separating the check valve portion and the pressure reducing valve of the hot water storage type electric water heater. It is in.

In order to solve the above problems, the hot water storage type electric water heater according to the present invention is a hot water storage type electric water heater that discharges stored hot water, and includes a case constituting the outer shell of the hot water storage type electric water heater and a heater. A hot water storage tank provided, a water supply pipe for supplying water to the hot water storage tank, a check valve portion provided in the water supply pipe to prevent backflow of water, and a check valve portion provided in the water supply pipe and the check valve portion. A pressure reducing valve provided on the downstream side of the water supply to reduce the pressure of the supplied water, a hot water outlet pipe for discharging hot water from the hot water storage tank, and an external water supply pipe between the check valve portion and the pressure reducing valve. It is characterized by having an air passage for guiding air to the water supply pipe and an operation unit for opening and closing the air passage.

In the hot water storage type electric water heater of the first invention, by arranging the pressure reducing valve on the downstream side of the check valve portion, the degree of freedom in arranging the check valve portion and the pressure reducing valve can be increased, and the hot water storage type electric hot water can be arranged. The vessel can be miniaturized. In addition, if the check valve and the pressure reducing valve are separated in this way, the air does not replace the check valve because the opening of the valve in the pressure reducing valve is small, and the water supply pipe between the check valve and the pressure reducing valve is used. Water will stay. If water stays in the water supply pipe in this way, the water may freeze and the water supply pipe may be damaged in areas where the temperature is low. Therefore, by providing an air passage for guiding the outside air to the water supply pipe between the check valve and the pressure reducing valve, the air is supplied to the water supply pipe, so that the water does not stay on the downstream side. Since it flows, it is possible to prevent the water from freezing and damaging the water supply pipe.

The hot water storage type electric water heater of the second invention further includes a fixing member for fixing the check valve portion, and the check valve portion is fixed to the fixing member and in the vicinity of the fixing member. The intake operation unit is arranged above the fixing member, and the air passage is arranged with the water supply pipe so that the angle formed from the upstream side to the downstream side of the water supply pipe is an acute angle. It is characterized by being communicated.

In the hot water storage type electric water heater of the second invention, the check valve portion is fixed to the fixing member and arranged in the vicinity of the fixing member, and the intake operation portion is arranged on the upper side of the fixing member to provide an air passage. It can be shortened and the opening and closing operation of the air passage can be facilitated. Further, the size can be reduced by making the angle formed by the air passage and the water supply pipe an acute angle. More specifically, for example, when the angle formed by the air passage and the water supply pipe is at an acute angle, it is necessary to move the water supply pipe and the air passage in order to make the position of the intake operation unit a desired position, which increases the size. However, by making the angle formed by the air passage and the water supply pipe an acute angle, it is possible to reduce the size without moving the air passage and the water supply pipe.

According to the present invention, a small hot water storage type electric water heater can be provided by separating the check valve portion and the pressure reducing valve of the hot water storage type electric water heater.

It is a schematic perspective view of the hot water storage type electric water heater which concerns on embodiment of this invention. It is a schematic block diagram of the hot water storage type electric water heater which concerns on embodiment of this invention. It is an internal block diagram of the hot water storage type electric water heater which concerns on embodiment of this invention. It is an external view which looked at the check valve part and the air passage of the hot water storage type electric water heater which concerns on embodiment of this invention from the side. It is a figure of the fixed structure of the check valve part of the hot water storage type electric water heater which concerns on embodiment of this invention. It is sectional drawing of the air passage of the hot water storage type electric water heater which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same components are given the same sign as much as possible in each drawing, and duplicate description is omitted. The present invention is not limited to the embodiments shown below.

This hot water storage type electric water heater will be described with reference to FIG. FIG. 1 is a schematic perspective view of a hot water storage type electric water heater 1 according to an embodiment of the present invention. As shown in FIG. 1, the hot water storage type electric water heater 1 includes an electric water heater main body 2, a switch unit 3 for operating the electric water heater main body, and a case 4 forming an outer shell of the hot water storage type electric water heater 1. Have.

The switch 3 is provided with a power button 3a or the like for turning on / off the power of the hot water storage type electric water heater 1. Although not shown, a start button for starting water supply to the electric water heater main body 2 may be provided in addition to the power button 3a.

Next, the configuration of the hot water storage type electric water heater 1 will be described with reference to FIG. 2. FIG. 2 is a schematic configuration diagram of a hot water storage type electric water heater 1 according to an embodiment of the present invention.

As shown in FIG. 2, inside the electric water heater main body 2, a water supply pipe 5, a check valve portion 6, a pressure reducing valve 7, a hot water storage tank 8, an electric heater 9, a hot water mixing means 10, a hot water outlet pipe 11, and a hot water outlet Each of the member 12, the air passage 13, the intake operation unit 14, the discharge pipe 16 having the discharge port 15, the on-off valve 17 for opening and closing the discharge pipe 16, the operation unit 18 for opening and closing the on-off valve 17, and the control unit 19. ..

As shown in FIG. 2, the upstream side of the water supply pipe 5 is connected to a water supply source (not shown) such as water supply, so that the water supplied from this water supply source (not shown) can pass through. It has become. Further, as shown in FIG. 2, the water supply pipe 5 is supplied with water from a water supply source to the check valve portion 6 for preventing the water in the electric water heater main body 2 from flowing back and the downstream side of the check valve portion 6. It is connected to a pressure reducing valve 7 for reducing the pressure of the water pressure, and is configured to branch to the hot water side water passage 20 and the water side water passage 21 on the downstream side of the pressure reducing valve 7.
The hot water side water passage 20 is connected to the hot water storage tank 8. Further, the hot water side water passage 20 is on the upstream side of the hot water storage tank 8, one of which is branched to the hot water storage tank 8 and the other to the discharge pipe 16.
After branching from the hot water side water passage 20, the water side water passage 21 becomes a hot water mixing means 10 for mixing hot water from the hot water storage tank 8 and water from the water side water passage 21 on the downstream side of the water side water passage 21. It is connected.

Next, as shown in FIG. 2, the hot water storage tank 8 is a tank for storing water supplied from the hot water side water passage 20.
Further, as shown in FIG. 2, the electric heater 9 is provided in the hot water storage tank 8. The electric heater 9 functions as an electric heating unit that electrically heats the water in the hot water storage tank 8.
Further, the hot water mixing means 10 is provided on the downstream side of the hot water storage tank 8, and hot water from the hot water storage tank 8 and water from the water side water passage 21 flow into the hot water storage tank 8. When the faucet (not shown) is opened, the hot water from the hot water storage tank 8 and the water from the water side water passage 21 flow in, and after mixing the inflowing hot water, the water flows to the hot water outlet pipe 11 side. It is configured.
Further, the hot water outlet pipe 11 is connected to a hot water outlet member 12 for connecting with a faucet (not shown) provided on the downstream side of the electric water heater main body 2 with a hose.

Next, as shown in FIG. 2, the air passage 13 operates the intake operation unit 14 when draining the water in the hot water storage tank 8 at the time of maintenance of the electric water heater main body 2, for example, so that the hot water storage tank 8 is operated. Allows intake to.
Further, the on-off valve 17 is provided in the middle of the discharge pipe 16, and by operating the operation unit 18 for operating the on-off valve 17, water from the discharge port 15 to the hot water storage tank 8 or the like is operated through the discharge pipe 16. Can be discharged.

The control unit 19 is provided in the case 4, and the electric heater 9 is based on the operation of the switch unit 3 and the signal from the faucet (not shown) provided on the downstream side of the electric water heater main body 2. It is configured to control the energization of the switch.

The internal structure of the hot water storage type electric water heater 1 will be described with reference to FIG. FIG. 3 is an internal configuration diagram of the hot water storage type electric water heater 1 according to the embodiment of the present invention.

As shown in FIG. 3, in the hot water storage type electric water heater 1, a discharge pipe 16, a discharge port 15, and an operation unit 18 are arranged on the lower side of the hot water storage tank 8, and a check valve portion 6 on the upper side of the hot water storage tank 8. A pressure reducing valve 7, a hot water mixing means 10, a hot water discharge pipe 11, and a hot water discharge member 12 are arranged.

The electric water heater main body 2 has a check valve portion 6 and a fixing member 30 for preventing the hot water outlet member 12 from coming out of the hot water outlet pipe 11.
The fixing member 30 is fixed by being fastened to the check valve portion 6 with a screw, and the hot water discharge member 12 is fixed by being pressed from above by the fixing member 30 after being inserted from above the hot water discharge pipe 11. There is.

Next, the structure of the air passage 13 will be described with reference to FIGS. 4 to 6. FIG. 4 is an external view of the check valve portion 6 and the air passage 13 of the hot water storage type electric water heater 1 according to the embodiment of the present invention as viewed from the side. FIG. 5 is a diagram of a fixed structure of the check valve portion 6 of the hot water storage type electric water heater 1 according to the embodiment of the present invention. FIG. 6 is a cross-sectional view of the air passage 13 of the hot water storage type electric water heater 1 according to the embodiment of the present invention.

As shown in FIG. 4, the check valve portion 6 is arranged on the upper side of the fixing member 30, and has an air passage 13 (described later) and an intake operation portion 14 in a part of the check valve portion 6. ..
As shown in FIG. 5, the check valve portion 6 has a fixing seat 101 for fixing the check valve 6 to the fixing member 30, and the check valve portion 30 passes through a screw hole provided in the fixing seat 101 and is fixed by a screw 100. Is fixed to.

The air passage 13 will be described with reference to FIG. 6, which is a cross section taken along the line AA of FIG. A water supply pipe 5 is connected to the downstream side of the check valve portion 6. The water flowing through the water supply pipe 5 flows from the upstream side to the downstream side like a water line WL. The air passage 13 is configured such that the check valve portion outer shell portion 6a constituting the check valve portion 6 is machined and communicates with the water supply pipe 5. At the end of the air passage 13 opposite to the water supply pipe 5, an intake operation unit 14 for communicating the air passage 13 and the outside air is provided. By removing the intake operation unit 14 from the air passage 13, the outside air can be guided to the water supply pipe 5.

The air line AL, which extends the air passage 13 to the water supply pipe 5 side and is the traveling direction of the outside air, intersects the water line WL, but the air passage 13 has an angle θ at which the air line AL and the water line WL intersect. Is configured to have an acute angle.

As described above, in the hot water storage type electric water heater 1, by arranging the pressure reducing valve 7 on the downstream side of the check valve portion 6, the degree of freedom in arranging the check valve portion 6 and the pressure reducing valve 7 can be increased. , The hot water storage type electric water heater 1 can be miniaturized. Further, if the check valve portion 6 and the pressure reducing valve 7 are separated in this way, the opening degree of the valve in the pressure reducing valve is small, and water is supplied to the water supply pipe 5 between the check valve portion 6 and the pressure reducing valve 7. Will stay. If water stays in the water supply pipe 5 in this way, the water may freeze and the water supply pipe 5 may be damaged in an area where the temperature is low. Therefore, by providing an air passage 13 for guiding the external air to the water supply pipe 5 between the check valve portion 6 and the pressure reducing valve 7, the air is supplied to the water supply pipe 5 and the water stays. Since it flows to the downstream side without any problem, it is possible to prevent the water from freezing and damaging the water supply pipe 5.

Further, in the hot water storage type electric water heater 1, the check valve portion 6 is fixed to the fixing member 30, and the check valve portion 6 is arranged in the vicinity of the fixing member 30, and the intake operation portion 14 is arranged on the upper side of the fixing member 30. The air passage 13 can be shortened, and the opening / closing operation of the air passage 13 can be facilitated. Further, the size can be reduced by making the angle θ formed by the air passage 13 and the water supply pipe 5 an acute angle. More specifically, for example, when the angle θ formed by the air passage 13 and the water supply pipe 5 is an acute angle, the water supply pipe 5 and the air passage 13 are moved in order to make the position of the intake operation unit 14 a desired position. Although it is necessary to increase the size, by making the angle formed by the air passage 13 and the water supply pipe 5 an acute angle, the size can be reduced without moving the air passage 13 and the water supply pipe 5.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments described and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general concept of the invention as defined by the appended claims and their equivalents.

1 Hot water storage type electric water heater 2 Electric water heater body 3 Switch part 3a Power button 4 Case 5 Water supply pipe 6 Check valve part 6a Check valve part Outer part 7 Pressure reducing valve 8 Hot water storage tank 9 Electric heater 10 Hot water mixing means 11 Hot water discharge Pipe 12 Hot water outlet member 13 Air passage 14 Intake operation unit 15 Discharge port 16 Discharge pipe 17 Open / close valve 18 Operation unit 19 Control unit 20 Hot water side water passage 21 Water side water passage 30 Fixing member 100 Screw 101 Fixed seat

Claims (2)

A case that is a hot water storage type electric water heater that discharges the stored hot water and constitutes the outer shell of the hot water storage type electric water heater, and
A hot water storage tank equipped with a heater and
A water supply pipe that supplies water to the hot water storage tank,
A check valve portion provided on the water supply pipe to prevent backflow of water,
A pressure reducing valve provided in the water supply pipe and downstream of the check valve portion to reduce the pressure of the supplied water.
A hot water discharge pipe that discharges hot water from the hot water storage tank,
An air passage for guiding external air to the water supply pipe in the water supply pipe between the check valve portion and the pressure reducing valve,
A hot water storage type electric water heater characterized by having an intake operation unit that opens and closes the air passage. Further provided with a fixing member for fixing the check valve portion,
The check valve portion is fixed to the fixing member and is arranged in the vicinity of the fixing member.
The intake operation unit is arranged on the upper side of the fixing member.
The hot water storage type electric water heater according to claim 1, wherein the air passage is communicated with the water supply pipe so that the angle formed in the direction from the upstream side to the downstream side of the water supply pipe is an acute angle. ..

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