JP2021089078A - Instantaneous electric boiler - Google Patents

Abstract

To provide an instantaneous electric boiler that has its enclosure made short.SOLUTION: An instantaneous electric boiler according to the present invention comprises an enclosure 10 which constitutes an outer shell, a tank 20 which is arranged in the enclosure 10, a heater 30 which is arranged in the tank 20, water supply piping 40 which supplies water to the tank 20, and hot water supply piping 50 which delivers hot water from the tank 20. The tank 20 is formed of a cylindrical barrel part 21, and a pair of end face parts 22, 23 closing both ends of the cylindrical barrel part 21, wherein a lengthwise length 21L of the cylindrical barrel part 21 is made longer than a diameter 22D of the end face parts 22, 23, a length direction of the cylindrical barrel part 21 is arranged along a width of the enclosure 10, and a breadthwise length of the enclosure 10 is made longer than a height-directional length of the enclosure 10.SELECTED DRAWING: Figure 1

Description

The present invention particularly relates to an instantaneous electric water heater used for a shower.

Conventionally, an instantaneous electric water heater particularly suitable for a shower has been proposed (for example, Patent Document 1). The instantaneous electric water heater described in Patent Document 1 includes a housing constituting an outer shell, a tank arranged in the housing, a heater arranged in the tank, a water supply pipe for supplying water to the tank, and a tank. It is equipped with a hot water supply pipe that discharges hot water from.

Japanese Unexamined Patent Publication No. 2012-172947

The tank described in Patent Document 1 is a vertically long instantaneous electric water heater that is longer in the height direction than the width direction. In such a conventional instantaneous electric water heater, the tank is like under a washbasin. It may be difficult to install in a place where space is limited in the height direction.

Therefore, an object of the present invention is to provide an instantaneous electric water heater capable of lowering the height of the housing.

The instantaneous electric water heater of the present invention according to claim 1 includes a housing 10 constituting an outer shell, a tank 20 arranged in the housing 10, and a heater 30 arranged in the tank 20. A pair of end faces that include a water supply pipe 40 that supplies water to the tank 20 and a hot water supply pipe 50 that discharges hot water from the tank 20, and the tank 20 closes both ends of the cylindrical body portion 21 and the cylindrical body portion 21. An instantaneous electric water heater formed by the portions 22 and 23, the length 21L of the cylindrical body portion 21 in the longitudinal direction is made longer than the diameter 22D of the end face portions 22 and 23, and the cylindrical body is formed. The longitudinal direction of the portion 21 is arranged as the width direction of the housing 10, and the width direction length of the housing 10 is made longer than the height direction length of the housing 10.
According to the second aspect of the present invention, in the instantaneous electric water heater according to the first aspect, the tank water supply connection port 41 of the water supply pipe 40 is connected to one of the end face portions 22, and the tank of the hot water supply pipe 50 is connected. The hot water supply connection port 51 is connected to the upper portion of the cylindrical body portion 21 and the other end face portion 23 side, and at least a part of the hot water supply pipe 50 is connected to the virtual tank center line 20C of the cylindrical body portion 21. It is characterized in that it is arranged above the position and on the side of the cylindrical body portion 21.
According to the third aspect of the present invention, in the instantaneous electric water heater according to the second aspect, the coil heaters 30A and 30B are used as the heater 30, and the virtual coil center line 30C of the coil heaters 30A and 30B is used. The heater 30 is arranged in the tank 20 so as to be parallel to the virtual tank center line 20C and the virtual coil center line 30C of the coil heaters 30A and 30B is located below the virtual tank center line 20C. It is characterized by.
The present invention according to claim 4 is characterized in that, in the instantaneous electric water heater according to claim 2 or 3, the tank water supply connection port 41 is located below the virtual tank center line 20C. And.
The present invention according to claim 5 is characterized in that, in the instantaneous electric water heater according to claim 3, the tank water supply connection port 41 is set at a position that does not coincide with the virtual coil center line.
The present invention according to claim 6 is characterized in that, in the instantaneous electric water heater according to claim 3, the tank water supply connection port 41 is located below the virtual coil center line.
According to the seventh aspect of the present invention, in the instantaneous electric water heater according to any one of claims 1 to 6, the electrical substrate 60 on which the electronic components are mounted is arranged on the lower surface of the resin cover 70. The resin cover 70 is arranged below the tank 20 with a predetermined space.
The present invention according to claim 8 is characterized in that, in the instantaneous electric water heater according to claim 7, the resin cover 70 is arranged so as to be inclined from a horizontal plane.
According to the ninth aspect of the present invention, in the instantaneous electric water heater according to the seventh or eighth aspect, an upper wall raised from the resin cover 70 is provided around the resin cover 70. A dew condensation water discharge portion is formed on the upper wall or the resin cover 70.
The present invention according to claim 10 is the instantaneous electric water heater according to any one of claims 7 to 9, wherein the resin cover 70 is hung from the resin cover 70 around the resin cover 70. It is characterized by having a lower wall.

According to the present invention, the height of the housing can be lowered by horizontally arranging the cylindrical tank with the longitudinal direction of the housing as the width direction of the housing, and it is easy to install in the lower space of the wash basin, for example.

Partial cross-sectional front view showing the inside of the housing of the instantaneous electric water heater according to an embodiment of the present invention. Configuration diagram of the main parts of the same-instantaneous electric water heater

In the instantaneous electric water heater according to the first embodiment of the present invention, the longitudinal length of the cylindrical body portion is made longer than the diameter of the end face portion, and the longitudinal direction of the cylindrical body portion is the width of the housing. It is arranged as a direction, and the length in the width direction of the housing is longer than the length in the height direction of the housing. According to the present embodiment, the height of the housing can be lowered by horizontally arranging the cylindrical tank in the longitudinal direction as the width direction of the housing, and it is easy to install it in the lower space of the wash basin, for example.

In the second embodiment of the present invention, in the instantaneous electric water heater according to the first embodiment, the tank water supply connection port of the water supply pipe is connected to one end face portion, and the tank hot water supply connection port of the hot water supply pipe is connected. , Connected to the upper part of the cylindrical body and the other end face side, and at least a part of the hot water supply pipe is located above the virtual tank center line of the cylindrical body and to the side of the cylindrical body. It is the one that was placed. According to the present embodiment, the water introduced into the tank from the water supply pipe becomes a turbulent flow by the heater as the flow velocity decreases, and is heated while flowing from one end face portion to the other end face portion. , The hot water is surely hot near the tank hot water supply connection port. Further, by overlapping the hot water supply pipe with the tank, the length in the width direction of the housing can be shortened.

In the third embodiment of the present invention, in the instantaneous electric water heater according to the second embodiment, a coil heater is used as a heater, and the virtual coil center line of the coil heater is parallel to the virtual tank center line. , The heater is arranged in the tank so that the virtual coil center line of the coil heater is located below the virtual tank center line. According to the present embodiment, the water below the tank is easily heated, and the hot water heated by the heater is easily guided to the upper part of the tank, so that the water is surely hot in the vicinity of the hot water supply connection port of the tank.

The fourth embodiment of the present invention is the instantaneous electric water heater according to the second or third embodiment, in which the tank water supply connection port is located below the virtual tank center line. According to this embodiment, it is possible to prevent the water flowing in from the tank water supply connection port from being mixed with the hot water above the tank.

In the fifth embodiment of the present invention, in the instantaneous electric water heater according to the third embodiment, the tank water supply connection port is positioned so as not to coincide with the virtual coil center line. According to this embodiment, the flow of water flowing in from the tank water supply connection port can be disturbed, and the water can be easily heated.

A sixth embodiment of the present invention is the instantaneous electric water heater according to the third embodiment in which the tank water supply connection port is located below the virtual coil center line. According to the present embodiment, since the hot water heated by the heater can be easily guided above the tank, the hot water is surely hot in the vicinity of the hot water supply connection port of the tank.

In the seventh embodiment of the present invention, in the instantaneous electric water heater according to any one of the first to sixth embodiments, the electrical substrate on which the electronic components are mounted is arranged on the lower surface of the resin cover. A resin cover is placed below the tank with a predetermined space. According to this embodiment, the influence of heat from the tank is less likely to be applied to the electronic component, and the electronic component can be protected from the condensed water dripping from the tank.

The eighth embodiment of the present invention is the instantaneous electric water heater according to the seventh embodiment, in which the resin cover is arranged so as to be inclined from the horizontal plane. According to the present embodiment, the electronic components can be protected from the condensed water by allowing the condensed water dropped on the resin cover to flow along the inclination.

In the ninth embodiment of the present invention, in the instantaneous electric water heater according to the seventh or eighth embodiment, an upper wall raised from the resin cover is provided around the resin cover, and the upper wall is provided. Alternatively, a dew condensation water discharge portion is formed on a resin cover. According to the present embodiment, the dew condensation water dripping on the resin cover can be prevented from reaching the electronic component by the upper wall, and can be reliably discharged from the dew condensation water discharge portion.

In the tenth embodiment of the present invention, in the instantaneous electric water heater according to any one of the seventh to ninth embodiments, a lower wall protruding from the resin cover is provided around the resin cover. It is a thing. According to the present embodiment, since the dew condensation water dropped on the resin cover is dropped along the lower wall, it does not wrap around the electrical substrate.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional front view showing the inside of the housing of the instantaneous electric water heater according to the present embodiment. FIG. 1 shows a state in which the front cover of the housing is removed, and shows the arrangement of the constituent members in the housing.
In the instantaneous electric water heater according to the present embodiment, the housing 10 constituting the outer shell, the tank 20 arranged in the housing 10, the heater 30 arranged in the tank 20, and the water supply to the tank 20 are supplied. It includes a pipe 40, a hot water supply pipe 50 that discharges hot water from the tank 20, and a resin cover 70 on which an electrical board 60 on which an electronic component 61 is mounted is arranged.
The tank 20 is formed of a cylindrical body portion 21 and a pair of end face portions 22 and 23 that close both ends of the cylindrical body portion 21. The length 21L in the longitudinal direction of the cylindrical body portion 21 is made longer than the diameters 22D of the end face portions 22 and 23, and the longitudinal direction of the cylindrical body portion 21 is arranged as the width direction of the housing 10.

The housing 10 is located on the wall mounting plate 11 to which the tank 20 and the resin cover 70 are attached, one side plate 12 located on one end surface portion 22 side of the tank 20, and the other end surface portion 23 side of the tank 20. Formed by the other side plate 13, the top plate 14 located above the tank 20, the bottom plate 15 located below the tank 20, and the front plate (not shown) facing the wall mounting plate 11 and covering the entire surface. Will be done.
The width direction length of the housing 10, that is, the lengths of the top plate 14 and the bottom plate 15, is made longer than the height direction length of the housing 10, that is, the side plates 12 and 13.
In this way, by horizontally arranging the cylindrical tank 20 with the longitudinal direction of the housing 10 as the width direction of the housing 10, the height of the housing 10 can be lowered, and it is easy to install it in the lower space of the wash basin, for example.

Electric power is supplied to the heater 30 via the electric power control element 31. The power control element 31 controls the power supplied to the heater 30. An earth leakage breaker 32 is provided in the power supply line to the heater 30.

The water supply pipe 40 connects the tank water supply connection port 41 to one end surface portion 22 of the tank 20. The water supply pipe 40 is provided with a flow rate sensor unit 42 and a filter 43, and the water supply pipe 40 is connected to the water supply port 44.
The flow rate sensor unit 42 detects the amount of water supplied to the water supply pipe 40. The filter 43 removes dust contained in the water supply supplied to the water supply pipe 40. The water supply port 44 is connected to the water inlet.
The water supplied from the water supply port 44 passes through the filter 43 and the flow rate sensor unit 42, and flows into the tank 20 from the tank water supply connection port 41.

The hot water supply pipe 50 connects the tank hot water supply connection port 51 to the upper portion of the cylindrical body portion 21 of the tank 20 and to the other end surface portion 23 side. The hot water supply pipe 50 is provided with thermostats 52, 53, 54 and a temperature sensor 55, and the hot water supply pipe 50 is connected to the hot water supply port 56.
The thermostats 52 and 53 are safety devices for preventing empty heating of the tank 20, and the thermostat 54 is a safety device for preventing the hot water temperature from exceeding the upper limit. The temperature sensor 55 detects the temperature of hot water discharged from the hot water supply pipe 50. The user can set the set temperature by operating the operation unit 81, and the hot water temperature control unit controls the power control element 31 so that the temperature detected by the temperature sensor 55 becomes the set temperature. Some electronic components 61 constitute a hot water temperature control unit.

According to this embodiment, the tank water supply connection port 41 of the water supply pipe 40 is connected to one end surface portion 22 of the tank 20, and the tank hot water supply connection port 51 of the hot water supply pipe 50 is the upper part of the cylindrical body portion 21. By connecting to the other end face portion 23 side, the water introduced into the tank 20 from the water supply pipe 40 becomes a turbulent flow by the heater 30 as the flow velocity decreases, and the water from one end face portion 22 to the other end face portion 23 It is heated while flowing toward, and it surely becomes hot water in the vicinity of the tank hot water supply connection port 51.

The electrical board 60 is arranged on the lower surface of the resin cover 70. The resin cover 70 is arranged below the tank 20 with a predetermined space from the tank 20. Therefore, the heat from the tank 20 does not easily affect the electronic component 61, and the electronic component 61 can be protected from the dew condensation water dripping from the tank 20.
The resin cover 70 is arranged so as to be inclined by θ from the horizontal plane. Here, the horizontal plane is the surface of the top plate 14 and the bottom plate 15. Therefore, the condensed water dropped on the resin cover 70 can be allowed to flow along the slope, so that the electronic component 61 can be protected from the condensed water.
A lower wall that hangs down from the resin cover 70 is provided around the resin cover 70. Here, the lower wall extends below the electrical board 60. Therefore, since the condensed water dropped on the resin cover 70 is dropped along the lower wall, it does not wrap around the electrical substrate 60.
By providing an upper wall raised from the resin cover 70 around the resin cover 70 and forming a dew condensation water discharge portion on the upper wall or the resin cover 70, the dew condensation water dropped on the resin cover 70 can be discharged. The upper wall can prevent the electronic component 61 from reaching the electronic component 61, and the condensed water can be reliably discharged from the condensed water discharge portion.

FIG. 2 is a configuration diagram of a main part of the instantaneous electric water heater according to the present embodiment. FIG. 2A shows a front view, and FIG. 2B shows a right side view.
A part of the hot water supply pipe 50X of the hot water supply pipe 50 is arranged above the virtual tank center line 20C of the cylindrical body portion 21, and a part of the hot water supply pipe 50Y of the hot water supply pipe 50 is on the side of the cylindrical body portion 21. It is placed in the direction. By overlapping the hot water supply pipes 50X and 50Y with the tank 20 in this way, the length of the housing 10 in the width direction can be shortened.
A coil heater is used for the heater 30. In this embodiment, two coil heaters 30A and 30B are used. The two coil heaters 30A and 30B have the same diameter of the coil portion, and the coil portion of the coil heater 30B is provided at the end of the coil portion of the coil heater 30A.
The virtual coil center line 30C of the coil heaters 30A and 30B is parallel to the virtual tank center line 20C, and the heater 30 is placed so that the virtual coil center line 30C of the coil heaters 30A and 30B is located below the virtual tank center line 20C. It is arranged in the tank 20.
In this way, by arranging the heater 30 in the tank 20 so that the virtual coil center lines 30C of the coil heaters 30A and 30B are located below the virtual tank center line 20C, the water below the tank 20 is heated. Since it is easy to guide the hot water heated by the heater 30 to the upper part of the tank 20, the hot water is surely generated in the vicinity of the tank hot water supply connection port 51.

The tank water supply connection port 41 is located below the virtual tank center line 20C. By locating the tank water supply connection port 41 below the virtual tank center line 20C in this way, it is possible to prevent the water flowing in from the tank water supply connection port 41 from mixing with the hot water above the tank 20.
The tank water supply connection port 41 is located at a position that does not coincide with the virtual coil center line 30C. By setting the tank water supply connection port 41 at a position that does not coincide with the virtual coil center line 30C in this way, the flow of water flowing in from the tank water supply connection port 41 can be disturbed, and the water can be easily heated.
The tank water supply connection port 41 is located below the virtual coil center line 30C. By locating the tank water supply connection port 41 below the virtual coil center line 30C in this way, it is easy to guide the hot water heated by the heater 30 to the upper side of the tank 20, so that it is reliable in the vicinity of the tank hot water supply connection port 51. It becomes hot water.

According to the present invention, the instantaneous electric water heater can be made compact and can be easily installed in the lower space of the wash basin.

10 Housing 11 Wall mounting plate 12 One side plate 13 The other side plate 14 Top plate 15 Bottom plate 20 Tank 20C Virtual tank center line 21 Cylindrical body 21L Longitudinal length 22, 23 End face 22D Diameter 30 Heater 30A, 30B Coil Heater 30C Virtual coil center line 31 Power control element 32 Leakage breaker 40 Water supply piping 41 Tank water supply connection port 42 Flow sensor unit 43 Filter 44 Water supply port 50 Hot water supply piping 50X, 50Y Some hot water supply piping 51 Tank hot water supply connection port 52, 53 , 54 Thermostat 55 Temperature sensor 56 Hot water supply port 60 Electrical board 61 Electronic components 70 Resin cover 81 Operation unit

Claims (10)

The housing that makes up the outer shell and
The tank arranged in the housing and
The heater placed in the tank and
The water supply pipe that supplies water to the tank and
It is equipped with a hot water supply pipe that discharges hot water from the tank.
The tank
Cylindrical body and
An instantaneous electric water heater formed by a pair of end face portions that close both ends of the cylindrical body portion.
The length of the cylindrical body portion in the longitudinal direction is made longer than the diameter of the end face portion.
The longitudinal direction of the cylindrical body is arranged as the width direction of the housing.
An instantaneous electric water heater characterized in that the length in the width direction of the housing is made longer than the length in the height direction of the housing. Connect the tank water supply connection port of the water supply pipe to one of the end faces,
The tank hot water supply connection port of the hot water supply pipe is connected to the upper portion of the cylindrical body portion and the other end face portion side.
The instantaneous electricity according to claim 1, wherein at least a part of the hot water supply pipe is arranged at a position above the virtual tank center line of the cylindrical body and on the side of the cylindrical body. Water heater. A coil heater is used as the heater.
The virtual coil center line of the coil heater is parallel to the virtual tank center line.
The instantaneous electric water heater according to claim 2, wherein the heater is arranged in the tank so that the virtual coil center line of the coil heater is located below the virtual tank center line. The instantaneous electric water heater according to claim 2 or 3, wherein the tank water supply connection port is located below the virtual tank center line. The instantaneous electric water heater according to claim 3, wherein the tank water supply connection port is located at a position that does not coincide with the virtual coil center line. The instantaneous electric water heater according to claim 3, wherein the tank water supply connection port is located below the virtual coil center line. The electrical board on which the electronic components are mounted is placed on the underside of the resin cover.
The instantaneous electric water heater according to any one of claims 1 to 6, wherein the resin cover is arranged below the tank with a predetermined space. The instantaneous electric water heater according to claim 7, wherein the resin cover is arranged so as to be inclined from a horizontal plane. An upper wall raised from the resin cover is provided around the resin cover.
The instantaneous electric water heater according to claim 7 or 8, wherein a dew condensation water discharge portion is formed on the upper wall or the resin cover. The instantaneous electric water heater according to any one of claims 7 to 9, wherein a lower wall that hangs down from the resin cover is provided around the resin cover.

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