JP2019113261A - Hot water storage type electric water heater - Google Patents

Abstract

To provide a hot water storage type electric water heater 1 which can secure flow passage breakage prevention caused by freezing and a sanitary property by draining water in the hot water storage type electric water heater 1, and which has high usability during a draining operation.SOLUTION: A hot water storage type electric water heater 1 for discharging the stored hot water includes: a case 4 for constituting an outer case of the hot water storage type electric water heater 1; a hot water storage tank 8 in which an electric heater 9 is provided; a water supply pipe 5 for supplying water to the hot water storage tank 8; a hot water tapping pipe 11 for discharging hot water from the hot water storage tank 8; a discharge pipe 16 having a discharge port 15 for draining hot water/water in the hot water storage tank 8; an opening/closing valve 17 provided at the discharge pipe 16, and for opening/closing the discharge pipe 16; and an operation part 18 for operating the opening/closing of the opening/closing valve 17. The operation part 18 is arranged at a position different from the discharge port 15.SELECTED DRAWING: Figure 4

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 machine etc., the thing described in the following patent documents 1 is 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. In the hot water storage tank, the supplied water is heated by the electric heater, and the heated water passes through the hot water discharge pipe, and the water mixed at an appropriate temperature by the hot water mixing means is discharged from the water faucet.
In addition, when the water storage type electric water heater is not used for a long time, or the water remaining in the flow path in the water storage tank and in the water storage type electric water heater freezes and the flow path is damaged, the water in the hot water storage tank And an outlet for discharging water in the flow path.

JP, 2015-068514, A

The hot water storage type electric water heater described in the above-mentioned patent document 1 has a discharge port which can discharge the water in the hot water storage tank and the water in the flow passage, so the breakage of the flow passage due to freezing and the long time use Sanitation can be secured by draining water at the time.
However, when draining water from a hot water storage type electric water heater actually, there is room to improve usability. More specifically, since the hot water storage type electric water heater is provided below the hand-washer etc., when draining, operate the operation section with the hose connected to the discharge port and the hose connected. It is necessary to open the on-off valve. When the operation part is rotated to open the on-off valve, the connection of the hose becomes unstable, and the hose must be held, and there is room for improvement to improve usability.

  The present invention has been made in view of such problems, and an object thereof is to perform drainage in a hot water storage type electric water heater, which can ensure flow path damage due to freezing and sanitation, and at the time of drainage operation. It is to provide a highly convenient hot water storage type electric water heater.

  In order to solve the above problems, a storage type electric water heater according to the present invention is a storage type electric water heater for discharging stored hot water, and a case constituting a shell of the 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 hot water discharge pipe for discharging hot water from the hot water storage tank, a discharge pipe having a discharge port for discharging hot water in the tank, the discharge pipe An opening / closing valve for opening / closing the discharge pipe, and an operation unit for operating the opening / closing of the opening / closing valve, wherein the operation unit is disposed at a position different from the discharge port. Do.

  The storage-type electric water heater of the first invention can prevent the water such as the discharge pipe from being frozen and damaged by providing a discharge pipe having a discharge port for discharging the water of the hot water storage tank. Furthermore, when the hot water storage type electric water heater is not used for a long time, sanitation can be secured by discharging the water in the hot water storage tank. Furthermore, by disposing the operation unit at a position different from the discharge port, it is possible to suppress the connection state of the hose from becoming unstable when operating the operation unit, and the usability can be improved.

  The water storage type electric water heater of the second invention is characterized in that the discharge port has a hose connection portion for connecting a hose.

  The water storage type electric water heater of the second invention has a hose connection portion, so when the hose is connected, there is no need for the user to grip the vicinity of the hose connection portion, and usability can be improved. .

  The hot water storage type electric water heater of the third invention is characterized in that the on-off valve is configured to change an opening degree by a turning operation of the operation part.

  In the storage-type electric water heater of the third invention, a large amount of water is discharged when the user unexpectedly touches the operation unit by gradually changing the opening degree of the on-off valve by the turning operation of the operation unit. Since it can not be discharged from water, and a large amount of water can be discharged at the time of draining operation intentionally, usability can be improved.

  The storage-type electric water heater according to the fourth aspect of the invention is characterized in that the operation unit is provided inside the case and configured to interfere with the case when the operation unit moves a predetermined distance.

  The storage-type electric water heater according to the fourth aspect of the invention is configured to interfere with the case when the operation unit moves a predetermined distance, so that it interferes with the case when it moves a predetermined distance even when the operation unit is operated excessively. Thus, the operating unit can be prevented from coming off.

  According to the present invention, it is possible to secure flow path damage and sanitation due to freezing by draining water in a hot water storage type electric water heater, and to provide a highly useful hot water storage type electric water heater when draining operation. it can.

It is a schematic perspective view of a hot water storage type electric water heater concerning an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the hot water storage type electric water heater concerning embodiment of this invention. It is an internal block diagram of the hot water storage type electric water heater concerning embodiment of this invention. It is a block diagram of the discharge pipe of the hot water storage type electric water heater concerning embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the normal time of the hot water storage type electric water heater concerning embodiment of this invention. It is a sectional view at the time of drainage of a hot water storage type electric water heater concerning an embodiment of the present invention. It is an external view at the time of the normal time of the operation part of the hot water storage type electric water heater concerning embodiment of this invention. It is an external view at the time of water drainage of the operation part of the hot water storage type electric water heater concerning embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In order to facilitate understanding of the description, in the drawings, the same components are denoted by the same reference numerals as much as possible, and redundant description will be omitted. Note that the present invention is not limited by the embodiments described 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 comprises an electric water heater main body 2, a switch section 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 3 a and the like for turning on and off the power of the water storage type electric water heater 1. Although not shown, in addition to the power button 3a, a start button for starting water supply to the electric water heater main body 2 may be provided.

  Next, the configuration of the hot water storage type electric water heater 1 will be described with reference to FIG. FIG. 2: is a schematic block diagram of the hot water storage type electric water heater 1 concerning embodiment of this invention.

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

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 a water pipe so that water supplied from this water supply source (not shown) flows. It has become. Further, as shown in FIG. 2, the water supply pipe 5 is provided with a check valve 6 for preventing backflow of water in the electric water heater main body 2, and water pressure supplied to the downstream side of the check valve 6 from a water supply source. The pressure reducing valve 7 is connected to the pressure reducing valve 7 and the pressure reducing valve 7, and the hot water side water passage 20 and the water side water passage 21 are branched downstream 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 branched upstream to the hot water storage tank 8, one to the hot water storage tank 8 and the other to the discharge pipe 16.
The water side water flow path 21 is branched into the hot water side water flow path 20, and then the hot water from the hot water storage tank 8 and the water from the water side water flow path 21 on the downstream side of the water side water flow 21 It is connected.

Next, as shown in FIG. 2, the hot water storage tank 8 is a tank for storing the 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.
Furthermore, the hot and cold water mixing means 10 is provided on the downstream side of the hot water storage tank 8, and the hot water from the hot water storage tank 8 and the water from the water side water flow passage 21 flow in. By opening a water faucet (not shown), the hot water from the hot water storage tank 8 and the water from the water side water flow passage 21 flow in, and after mixing the inflowing hot and cold water, water flows to the hot water discharge pipe 11 side It is configured.
In addition, the hot water discharge pipe 11 is connected with a hot water discharge member 12 for connecting with a faucet (not shown) provided on the downstream side of the electric water heater main body 2 and a hose.

Next, as shown in FIG. 2, for example, when the water in the hot water storage tank 8 is drained during maintenance of the electric water heater main body 2 or the like, the hot water storage tank 8 is operated by operating the intake operation unit 14. Allow for air intake to
Further, the on-off valve 17 is provided in the middle of the discharge pipe 16, and operates the operation unit 18 for operating the on-off valve 17 to supply water from the hot water storage tank 8 or the like from the discharge port 15 via the discharge pipe 16. Can be discharged.

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

  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, the hot water storage type electric water heater 1 is provided with a discharge pipe 16, a discharge port 15 and an operation unit 18 below the hot water storage tank 8, and a check valve 6 under reduced pressure above the hot water storage tank 8. A valve 7, hot and cold water mixing means 10, a hot water discharge pipe 11 and a hot water discharge member 12 are disposed.

The electric water heater body 2 has a check valve 6 and a fixing member 30 for preventing the hot water discharge member 12 from coming off the hot water discharge pipe 11.
The fixing member 30 is fixed by fastening to the check valve 6 with a screw, and the hot water discharging member 12 is fixed by being pressed from above by the fixing member 30 after being inserted from above the tapping tube 11 .

  Next, the structure of the discharge pipe 16 of the hot water storage type electric water heater 1 will be described with reference to FIGS. 4 to 6. FIG. 4 is a structural view of the discharge pipe 16 of the hot water storage type electric water heater 1 according to the embodiment of the present invention. FIG. 5: is sectional drawing of the discharge pipe 16 of the hot water storage type electric water heater 1 which concerns on embodiment of this invention at the time of normal. FIG. 6: is sectional drawing at the time of water drainage of the discharge pipe 16 of the hot water storage type electric water heater 1 which concerns on embodiment of this invention.

  As shown in FIG. 4, the discharge pipe 16 branches from the hot water side water passage 20 on the upstream side of the hot water storage tank 8 to form a flow path, and the water of the hot water storage tank 8 from the discharge port 15 at the downstream end of the discharge pipe 16 It is configured to discharge the Furthermore, the hot water storage type electric water heater 1 is often provided below the handwasher (not shown) etc. When discharging the water in the hot water storage tank 8, a hose (not shown) to the discharge port 15 Need to be connected and drained into a bucket etc via a hose (not shown). Therefore, the discharge port 15 has a tapered portion 31 (a hose connection portion) for connecting a hose (not shown). The tapered portion 31 is configured to expand in diameter toward the upstream side from the discharge port 15.

  As shown in FIG. 5, in the discharge pipe 16, an on-off valve 17 for opening and closing the flow path is provided. The on-off valve 17 is in communication with an operation unit 18 for operating the on-off valve 17. As shown in FIG. 5, when the on-off valve 17 closes the flow path of the discharge pipe 16, that is, under normal conditions, water flows to the hot water storage tank 8 through the hot water side water passage 20.

  As shown in FIG. 6, the operation unit 18 is screwed and is configured to open and close the on-off valve 17 by rotating the operation unit 18. In the normal state shown in FIG. 5, when the operation unit 18 is rotated, the on-off valve 17 is opened, the flow path to the discharge port 15 is in communication, and the water in the hot water storage tank 8 can be discharged. Furthermore, the operation unit 18 is provided at a position different from the discharge port 15.

  Thus, by providing the discharge port 15 at a position different from that of the operation unit 18, a hose (not shown) is connected to the tapered portion 31, and the user holds the tapered portion 31. Even when the operation unit 18 is operated to rotate, the connection between the hose (not shown) and the discharge port 15 does not become loose, and it is possible to suppress the reduction in usability. Further, the operating portion 18 for opening and closing the on-off valve 17 is configured to gradually increase the opening degree by rotation, whereby the opening degree of the on-off valve 17 when the user unexpectedly contacts the operating portion 18 Can be improved and usability can be improved.

  The retaining structure of the operation unit 18 will be described with reference to FIGS. 7 and 8. FIG. 7: is an external view at the time of the normal time of the operation part 18 of the hot water storage type electric water heater 1 which concerns on embodiment of this invention. FIG. 8 is an external view of the operation part 18 of the hot water storage type electric water heater 1 according to the embodiment of the present invention when water is drained.

  As shown in FIGS. 7 and 8, in the process of opening the on-off valve 17, the operation unit 18 operates the operation unit 18 for a predetermined distance in order to prevent it from falling off the discharge pipe 16. It is arranged to interfere with. More specifically, the case 4 has a retaining portion 40 projecting toward the front side which is the user side.

  As shown in FIG. 7, in the normal state, the case 4 ie, the retaining portion 40 and the operation portion 18 are in a state in which a predetermined distance is open, but as shown in FIG. As the holding portion 40 and the operation portion 18 gradually approach each other, the operation portion 18 and the holding portion 40 eventually come in contact with each other. By this configuration, even when the opening operation of the on-off valve 17 is performed excessively, the operation portion 18 can be prevented from falling off the discharge pipe 16, and usability can be improved.

  As described above, by providing the discharge pipe 16 having the discharge port 15 for discharging the water of the hot water storage tank 8, it is possible to prevent the water such as the discharge pipe 16 from being frozen and damaged. Furthermore, when the hot water storage type electric water heater 1 is not used for a long time, by discharging the water in the hot water storage tank 8, the sanitation can be secured. Furthermore, by arranging the operation unit 18 at a position different from the discharge port 15, it is possible to suppress the connection state of the hose from becoming unstable when operating the operation unit 18, and the usability can be improved.

  Since the storage water type electric water heater 1 has the hose connection portion 31, when the hose is connected, there is no need for the user to grip the vicinity of the hose connection portion 31, and usability can be improved.

  The hot water storage type electric water heater 1 gradually changes the opening degree of the open / close valve 17 by the turning operation of the operation unit 18 so that a large amount of water is discharged 15 when the user unintentionally touches the operation unit 18. Since it can not be discharged from water, and a large amount of water can be discharged at the time of draining operation intentionally, usability can be improved.

  The hot water storage type electric water heater 1 is configured to interfere with the case when the operation unit 18 moves a predetermined distance, so that it interferes with the case 4 when it moves a predetermined distance even when the operation unit 18 is operated excessively. The operation unit 18 can be prevented from coming off.

  Although the embodiment of the present invention has been described by taking the example of the first-stop type hot-water storage type electric water heater 1, the hot-water storage type electric water heater 1 having a solenoid valve etc. upstream of the hot water storage tank 8 It may be a stop type storage type electric water heater 1.

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

DESCRIPTION OF SYMBOLS 1 hot water storage type electric water heater 2 electric water heater main body 3 switch part 3a power button 4 case 5 water supply pipe 6 check valve 7 pressure reducing valve 8 hot water storage tank 9 electric heater 10 hot water mixing means 11 hot water pipe 11 hot water member 12 hot water member 13 air passage 14 Intake operation unit 15 Discharge port 16 Discharge pipe 17 On-off valve 18 Operation unit 19 Control unit 20 Hot water side water passage 21 Water side water passage 30 Fixing member 31 Taper portion (hose connection portion)
40 Retaining part

Claims (4)

A hot water storage type electric water heater that discharges stored hot water,
A case constituting an outer shell of the water storage type electric water heater;
A hot water storage tank provided with a heater,
A water supply pipe for supplying water to the hot water storage tank;
A hot water discharge pipe for discharging hot water from the hot water storage tank;
A discharge pipe having a discharge port for discharging hot and cold water in the hot water storage tank;
An on-off valve provided in the discharge pipe for opening and closing the discharge pipe;
An operating unit configured to operate the opening and closing of the open / close valve, wherein the operation unit is disposed at a position different from the discharge port. The hot water storage type electric water heater according to claim 1, wherein the discharge port has a hose connection portion for connecting a hose. The hot water storage type electric water heater according to claim 1 or 2, wherein the on-off valve is configured to change an opening degree by a pivoting operation of the operation unit. The hot water storage type electric water heater according to claim 3, wherein the operation unit is provided inside the case, and interferes with the case when the operation unit moves a predetermined distance.

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