JP2019066114A - Water heater - Google Patents

Abstract

To make it easy to route a wire to a controller.SOLUTION: A water heater comprises a housing 2 which accommodates a burner and a heat exchanger and is open in the front, and is constituted by installing, at a lower part in the housing 2, a box body 32 which accommodates an electrical substrate 31 on an upper side and an electric leak breaker 36 and a remote controller terminal base on a left and a right lower side respectively, and is open in the front and a controller 30 which includes a front cover capable of opening and closing the front of the box body 32 laterally. Between the electric leak breaker 36 and remote controller terminal base of the box body 32, a through hole 45 is formed which allows a bundle T of repeating harnesses 40 connected to a plurality of electric components in the housing 2 to penetrate the box body 32 from behind to be drawn out in front of the electrical substrate 31.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a water heater that houses a combustion chamber provided with a burner and a heat exchanger inside a housing, and a controller that controls the operation of the appliance.

The water heater connects the water supply pipe and the hot water discharge pipe to the heat exchanger heated to the burner, and is supplied from the water supply pipe through the external water pipe by opening the external hot water supply tap to which the hot water discharge pipe is connected. It is equipped with a hot water supply circuit that heats the water by heat exchange with the combustion exhaust of the burner and discharges it.
Such a water heater accommodates a combustion chamber provided with a burner at the lower part and a heat exchanger at the upper part, and also contains a controller for controlling the operation of the appliance. As disclosed in Patent Document 1, there is known a controller in which an electric component board is provided in a case and a leak breaker is accommodated in a case. Further, as disclosed in Patent Document 2, there is also known one which is installed sideways to the opening of the case opening the front surface to facilitate assembly and maintenance.

JP 2014-73031 A JP, 2016-1088, A

  The water heater uses detection components such as the thermistor and water level sensor, and multiple electric components such as the motor and the actuator such as the solenoid valve. These electric components are connected to the electrical component board of the controller through the harness Be done. However, since each electrical component is arranged at various positions in the housing, it is difficult to arrange the harnesses routed from each electrical component and to wire them to the electrical component board. In particular, when the controller is installed sideways in a case with narrow left and right width as in the cited document 2, the controller itself becomes an obstacle to the wiring of the harness, and the work of bypassing the controller and pulling out to the front becomes necessary. The handling of was bothersome.

  Then, this invention aims at providing the hot-water heater which can route wiring to a controller easily even if it installs a controller sideways in a housing | casing.

In order to achieve the above object, the invention according to claim 1 is provided with a case which accommodates a combustion chamber having a burner and a heat exchanger and is opened on the front side, and an electric component board is provided on the upper side in the lower part in the case. A hot water heater in which a controller is installed sideways including a box body which houses the leakage breaker and the remote control terminal block on the lower right and left sides and the front face is open, and a front cover which can open and close the front face of the box body. There,
A through hole through which a bundle of harnesses connected to a plurality of electric components in the housing penetrates from the rear to the front of the electrical board between the leakage breaker in the box body of the controller and the remote control terminal block Are formed.
According to the second aspect of the present invention, in the configuration of the first aspect, the bottom plate of the housing below the through hole is provided with a lead-in port of the power supply line connected to the leakage breaker. It is characterized in that a guide body is provided which covers the upper side of the mouth and is open at the front surface, and which divides between the bundle of harnesses penetrating the through hole and guides the power supply line to the front side.
According to a third aspect of the present invention, in the configuration of the second aspect, the power supply line guided by the guide body passes between the bundle of harnesses penetrating the through hole and the remote control terminal block after passing through the through hole. It is characterized in that it is wound around the upper side of the bundle of the harnesses and connected to the leakage breaker.

According to the first aspect of the present invention, a bundle of harnesses connected to a plurality of electric components in the case of the water heater is disposed between the leakage breaker in the box body of the controller and the remote control terminal block By forming a through hole that can be pulled out to the front side of the electrical component board so that the controller can be installed sideways to substantially close the opening of the narrow case, the wiring to the controller It can be easily handled. Therefore, work efficiency such as wiring and maintenance is enhanced.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the bottom plate of the housing below the through hole is provided with a lead-in port of the power supply line connected to the earth leakage breaker. Since the guide body which covers the upper part of the lead-in opening and opens the front surface and guides between the bundle of harnesses penetrating the through hole and guides the power supply line to the front side is provided, Can be pulled out smoothly to the front without interference with the harness bundle.
According to the invention of claim 3, in addition to the effect of claim 2, after the power supply line guided by the guide body penetrates the through hole, the bundle of harnesses and the remote control terminal block which penetrate the through hole Since the upper side of the bundle of harnesses is wound around and connected to the leakage breaker, it is possible to prevent the harnesses from being separated by using the power supply line.

It is explanatory drawing of a water heater, (A) is a front, (B) shows a side, (C) shows a bottom, respectively. It is a front view of the housing | casing which removed the front cover. It is an enlarged view of the controller part which removed the front cover. It is the AA line expanded sectional view of FIG. FIG. 5 is an enlarged cross-sectional view taken along line B-B of FIG. 2;

Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 1: is explanatory drawing which shows the external appearance of the water heater 1, (A) is a front, (B) is a side, (C) is each showing the bottom. The water heater 1 includes a vertically elongated box-like housing 2 which is open at the front by being surrounded by the top plate 3 and the bottom plates 4, left and right side plates 5 and 5, and a back plate 6, and a front closing the front of the case 2. A cover 7 is provided, and a horizontally long cylindrical exhaust port 8 provided in front of an exhaust hood 23 described later is made to project from the upper portion of the front cover 7. .. Are provided at the lower part and the side part of the front cover 7, and brackets 10, 10 for attachment to a wall or the like are attached to the upper and lower sides of the back plate 6.
In addition, a water inlet 11 for connecting a water pipe, a hot water outlet 12 for connecting an external pipe connected to an external hot water supply tap, and a bath return port for connecting an external pipe connected to an external bathtub to the bottom plate 4 13 and a bath opening 14 are provided. At the central portion, a gas inlet 15 for connecting an external gas pipe is provided, and in front of it, an inlet 16 for a power supply line is provided.

FIG. 2 is a front view of the inside of the housing 2 with the front cover 7 removed.
A combustion chamber 20 is disposed on the upper side in the housing 2. The combustion chamber 20 is formed by assembling a lower casing 21 accommodating a plurality of burner units and an upper casing 22 accommodating a hot water supply heat exchanger and a bath heat exchanger, and an exhaust hood 23 is assembled on the upper side of the upper casing 22. It is done. The water supply pipe 24 connected to the water inlet 11 is disposed upward through between the combustion chamber 20 and the side plate 5 on the left side of the housing 2, and the hot water supply heat transfer pipe of the hot water supply heat exchanger of the upper casing 22 Connected to the entrance. The hot water outlet pipe 25 connected to the hot water outlet 12 is disposed upward in front of the water supply pipe 24, passing between the combustion chamber 20 and the left side plate 5, and diagonally upward in front of the upper casing 22. Then, it is connected to the outlet of the hot water heat transfer pipe of the upper casing 22.

The bath return pipe 26 connected to the bath return port 13 is disposed upward through the space between the combustion chamber 20 and the right side plate 5 and crosses the front of the upper casing 22 diagonally upward to form the hot water outlet pipe 25. After crossing at the rear, it is connected to the inlet of the bath heat transfer tube of the bath heat exchanger of the upper casing 22. The bath return pipe 26 is provided with a pump (not shown). A bathing pipe 27 connected to the bathing port 14 is disposed upward in the rear of the bath return pipe 26 through between the combustion chamber 20 and the right side plate 5, and the bath heat exchanger of the upper casing 22 Is connected to the outlet of the bath heat transfer tube. A gas pipe (not shown) connected to the gas inlet 15 branches via a source gas solenoid valve and a gas proportional valve, and is connected to each burner unit. At the lower part of the combustion chamber 20, a combustion fan (not shown) is provided.
The water heater 1 is a single-can, two-channel type in which a hot water supply heat exchanger and a bath heat exchanger are provided in one combustion chamber 20 and heated by a common burner unit. The housing 2 is made smaller to the left and right.

Further, at the lower part of the combustion chamber 20, at the opening of the housing 2, a controller 30 for controlling the operation of the appliance is installed.
This controller 30 burns the burner unit when the hot water supply tap of the external piping connected to the hot water outlet 12 is opened and water flows from the water supply pipe 24 into the appliance, and the hot water supply heat exchanger The heat exchange with the combustion exhaust is performed, and the hot water is discharged from the hot water supply tap through the hot water discharge pipe 25 and the external piping. Further, hot water temperature control is performed to control the combustion amount (gas amount) of the burner unit, the water flow amount, the rotation speed of the combustion fan, and the like so that the hot water temperature becomes the set temperature set by the external remote controller.
On the other hand, when the automatic switch of the hot water supply remote control or bath remote control connected to the outside is pressed, the controller 30 burns the burner unit to cause the bath heat exchanger to exchange heat between the water and the combustion exhaust of the burner, Water filling control and reheating control are performed to supply a set amount of hot water from the hot water discharge pipe 25 to the bathtub through the drop-in pipe 28 (FIGS. 2 and 4) connecting with the bath return pipe 26.

Next, the controller 30 and the wiring structure around it will be described in detail.
As shown in FIGS. 2 and 3, the controller 30 includes a box main body 32 having a rectangular shape in a front view that houses the electrical component board 31 and opens the front, and a front cover 33 that closes the front of the box main 32. The front cover 33 is detachably attached to the box main body 32. When the front cover 33 is removed, the electrical board 31 having a rectangular shape in a front view attached to the bottom surface of the box main body 32 is exposed. On the upper surface of the box main body 32, screwing pieces 34, 34 for screwing to the front surface of the lower casing 21 are protrusively provided, and on the lower surface, locking pieces 35 engaged with the front end of the bottom plate 4 of the housing 2. Is formed bent.

Therefore, by positioning the box main body 32 on the bottom plate 4 in the front-rear direction by the locking pieces 35 and screwing the screwing pieces 34, 34 to the lower casing 21, the controller 30 is horizontally oriented at the opening of the housing 2. Installed in The screws 34, 34 can be removed forward by removing the screws. By narrowing the opening of the housing 2 to the left and right, the controller 30 substantially closes the lower front of the combustion chamber 20 except for the left side.
The electrical component board 31 has a size in the vertical direction shorter than that of the box body 32 and is attached to the upper side of the box body 32. In the box main body 32 on the lower side and right side of the electrical component board 31, the earth leakage breaker 36 and the remote control terminal block 37 for remote control connection are facing each other with the terminal portions on the front side and with the terminal portions facing each other It is installed at intervals.

  On the other hand, harnesses 38, 38, ... connected to detection components such as thermistors and water quantity sensors attached to each piping such as the water supply pipe 24 and the hot water discharge pipe 25 and a plurality of electric components such as motors and actuators such as solenoid valves As shown in FIGS. 4 and 5, the connectors 39, 39,... Collected at the rear of the controller 30 and provided at the terminals are connected to one of the connectors 41, 41,. The other connector 42 is connected to a predetermined connector on the electrical component board 31, whereby the detection component and the electrical component are electrically connected to the electrical component board 31.

  Here, a stepped portion 43 recessed toward the front side is formed on the lower side of the electrical component board 31 on the rear surface of the box main body 32, and the lower portion of the box main body 32 has a shallow bottom 44 receiving the leakage breaker 36 and the remote control terminal block 37 It has become. The through holes 45 of the relay harnesses 40 are formed between the leakage breaker 36 and the remote control terminal block 37 at the shallow bottom portion 44, and are connected to the harnesses 38 at the rear of the controller 30. The bundle T of the relay harnesses 40, 40,... Is pulled through the through hole 45 to the shallow bottom portion 44 in the box main body 32, and connected to the connector on the electric component board 31 and the remote control terminal block 37 above it. It is done.

  The power supply line 46 drawn from the inlet 16 of the bottom plate 4 is also drawn from the through hole 45 to the lower part of the box body 32 and connected to the earth leakage breaker 36. However, since the through hole 45 is located on the upper front side of the lead-in port 16, the base plate 4 has a lead-in port so that the power supply line 46 drawn from the lead-in port 16 does not interfere with the bundle T of the relay harness 40. A cap-like guide body 47 is attached which is open at the front surface so as to surround the upper and rear sides and the left and right sides of the body 16. Therefore, the bundle T of the relay harness 40 passes through the through hole 45 through the upper side of the guide body 47 that separates the power supply line 46 from the power supply line 46, and the power supply line 46 passes the inside of the guide body 47 from the inlet 16 forward. It can be wired up and down without getting in the way because it is pulled out.

  Then, the power supply line 46 drawn from the guide body 47 through the through hole 45 and drawn into the box body 32 is connected to the input terminal 48 on the lower left side of the earth leakage breaker 36. However, in this case, it is not drawn straight from the through hole 45, and is drawn upward through the space between the bundle T of the relay harness 40 and the remote control terminal block 37 as shown in FIG. After forming the detour portion 46 a by going around the upper side of the circuit, it is routed to the right side and connected to the input terminal 48 of the earth leakage breaker 36. In this way, after winding the bundle T of the relay harness 40 so as to bypass the bundle T, by connecting to the earth leakage breaker 36, it is possible to prevent the bundle T of the relay harness 40 from being separated by the bypass portion 46a. ing. The harnesses 50 and 50 connected to the output terminal 49 on the upper left side of the earth leakage breaker 36 are connected to the electrical component board 31 through the rear of the earth leakage breaker 36. Further, the remote control terminal block 37 is provided with a clip 51 for positioning the detour portion 46 a so as to hold a shape for detouring the bundle T of the relay harness 40.

In the water heater 1 configured as described above, when the harness 38 and the relay harness 40 are wired and assembled to the controller 30, the bundle T of the relay harness 40 connected to each harness 38 is used by using the through holes 45. Since the box body 32 can be penetrated near the lower side of the electric component board 31, the connection work of the respective harnesses 38 and 40 before and after the box main body 32 and the connection work of the relay harness 40 to the electric component board 31 can be performed easily be able to.
Similarly, the power supply line 46 can be penetrated to the box main body 32 in the vicinity of the side of the leakage breaker 36 using the through hole 45 from the lead-in port 16, and the guide body 47 with the bundle T of the relay harness 40 Since no interference occurs, the connection to the leakage breaker 36 can be easily made by smoothly pulling it forward from the inlet 16.
When the front cover 33 is placed on the box body 32 wired in this way and positioned and fixed in the housing 2, the assembly of the controller 30 is completed.

Also in maintenance, if the front cover 33 is removed, the electric circuit board 31, the leakage breaker 36 and the remote control terminal block 37 are exposed in the foremost position, so maintenance such as replacement of the relay harness 40 and the power supply line 46 can be easily performed.
In particular, here, the pipes such as the water supply pipe 24, the hot water discharge pipe 25, the bath return pipe 26, the bath return pipe 27 and the like are disposed on the side or rear of the controller 30 in front view and are not located on the front side. If 7 is removed, attachment and detachment of the controller 30 itself can also be carried out without disturbing the piping.

  Thus, according to the water heater 1 of the above embodiment, the relay harness 40 connected to the plurality of electrical components in the housing 2 between the leakage breaker 36 and the remote control terminal block 37 in the box body 32 of the controller 30 The controller 30 is installed sideways so that the opening of the case 2 which is narrow on the left and right sides, by forming the through hole 45 which allows the bundle T of the box body 32 to penetrate from the rear to the front side of the electric component board 31. Can be easily routed to the controller 30 even when the controller 30 is substantially closed. Therefore, work efficiency such as wiring and maintenance is enhanced.

In particular, here, the bottom plate 4 of the housing 2 below the through hole 45 is provided with the lead-in port 16 of the power supply wire 46 connected to the earth leakage breaker 36, and above the bottom plate 4 above the lead-in port 16. The front surface is open, and a guide body 47 is provided to partition the bundle T of the relay harness 40 passing through the through hole 45 and guide the power supply line 46 to the front side. Can be smoothly pulled forward without interference with the bundle T of the relay harness 40.
Further, after the power supply line 46 guided by the guide body 47 penetrates the through hole 45, the bundle T of the relay harness 40 passes between the bundle T of the relay harness 45 penetrating the through hole 45 and the remote control terminal block 37. Since it turns to the upper side of and is connected to the earth leakage breaker 36, it becomes possible to prevent the relay harness 40 from being separated by using the power supply line 46.

In the above embodiment, although the earth leakage breaker is provided on the right side and the remote control terminal block is provided on the left side, the left and right may be reversed. In this case, the power supply line drawn in from the inlet is connected to the left earth leakage breaker, bypassing the bundle of harnesses from the right side.
Moreover, in the said form, although the shallow bottom part is formed and the through hole is provided in the lower part of the box main body, you may provide a through hole instead of making it a shallow bottom part. Furthermore, the position of the through hole is not limited to the center in the left and right direction, but may be shifted to either the left or the right depending on the shape and the arrangement of the earth leakage breaker and the remote control terminal block.

On the other hand, the winding (detour portion) of the power supply wire to the bundle of harness may be omitted, and if the through hole and the lead-in port are shifted to the left or right, the through hole for power supply wire is formed separately from that for the harness. You may The harness itself is not limited to the form described above, and even if the harness is connected from the electric component to the electric component board without using the relay harness, wiring by the through hole is possible.
Further, the shape of the guide body is not limited to the above embodiment, and may be formed by cutting and raising from the bottom plate or integrally with the lead-in port. Furthermore, the guide body can be omitted if the possibility of interference with the bundle of the harness is small due to the lateral displacement between the through hole and the lead-in port.

  In addition, the configuration of the water heater itself is not limited to the one-can two-water channel type, and there is no bath circuit, only the hot water supply circuit, or a heat exchanger for latent heat recovery. The invention is applicable.

  1 · · · water heater, 2 · · · housing · 4 · · bottom plate 7 · · front cover 16 · · inlet port 20 · · combustion chamber 30 · · · controller · 31 · · · · · · · · · · · · · · · · Body · · · · front cover · · · · · · · · · · · · · remote control terminal block, 38 · · · harness, 39, 41, 42 · · · connector · 40 · relay harness, 43 · · · · · · · · · Shallow bottom, 45 · · · through hole, 46 · · power line, 47 · · guide body.

Claims (3)

A housing is provided which houses a combustion chamber having a burner and a heat exchanger and the front face is open, and an electric circuit board is housed on the upper side in the lower part in the housing and a leakage breaker and remote control terminal block on the lower side. A water heater in which a controller including a box body having an open front face and a front cover capable of opening and closing the front face of the box body is installed sideways,
A bundle of harnesses connected to a plurality of electrical components in the casing is penetrated from behind to the box body between the leakage breaker and the remote control terminal block in the box body of the controller from the rear side of the electric component board A water heater characterized in that a through hole which can be drawn out is formed.   Below the through hole, a bottom plate of the housing is provided with a lead-in port of a power supply line connected to the earth leakage breaker, and on the bottom plate, a front surface is opened covering the upper side of the lead-in port; The water heater according to claim 1, further comprising: a guide body for guiding the power supply line to the front side by partitioning between the bundle of harnesses passing through the through hole.   After passing through the through hole, the power supply line guided by the guide body passes between the bundle of the harness passing through the through hole and the remote control terminal block, and wraps around the upper side of the bundle of the harness The water heater according to claim 2, wherein the water leakage breaker is connected to the circuit breaker.

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