JP3928465B2 - Water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply apparatus having a filter and a check valve.
[0002]
[Prior art]
A conventional hot water supply apparatus having a structure as shown in FIG. 6 is known. A specific configuration will be described. In the figure, reference numeral 1 denotes a water supply water pipe, and this water supply water pipe 1 is connected to a water supply means 3 constituted by an electromagnetic valve, a proportional on-off valve or the like in the main unit 2. Reference numeral 4 denotes a filter for preventing the inflow of foreign matter from the water supply water pipe 1 attached in front of the water supply means 3. A water guide pipe 5 is connected to the other end of the water supply means 3 to supply water to the water storage container 6. It has become. A check valve 7 is provided in the middle of the water guide pipe 5 to prevent water from flowing back from the water storage container 6 side to the water supply water pipe 1 side. A heating means 8 composed of an electric heater is installed on the bottom surface of the water storage container 6 to heat the water in the water storage container 6. Reference numeral 9 denotes a hot water supply means constituted by an electric pump, one end of which is connected to the water storage container 6 and the other end is connected to the hot water supply path 10. 11 is a kitchen unit.
[0003]
[Problems to be solved by the invention]
However, since the filter 4 and the check valve 7 are provided in the main unit 2 in the conventional configuration, the main unit 2 is disassembled when the filter 4 is clogged or when the check valve 7 is to be cleaned. The maintenance has become very difficult.
[0004]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a hot water supply device in which a filter and a check valve can be easily removed and maintenance can be easily performed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the hot water supply apparatus of the present invention opens three sides of the connection pipe, closes one of the openings with a drain plug that can be detached from the outside of the case, and prevents inflow of foreign matter from the water supply water pipe. a filter to prevent, and a check valve to prevent backflow of water from the reservoir side, said draining plug incorporated detachably to the connection pipe while light holding the check valve and the filter, the draining plug the check valve during incorporation are held stopper in the connecting pipe Rutotomoni, the opening of the draining plug side of the connecting pipe is disposed in said case, removed the draining plug Sometimes the case receives residual water in the connecting pipe .
[0006]
Thereby, it is possible to prevent the filter and the check valve from falling off the drain plug due to the water flow, and by removing the drain plug, the filter and the check valve can be removed together for easy maintenance.
[0007]
Further, water remaining in the connection pipe when the drain plug is removed can be dripped into the case so as not to get wet outside the case.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 accommodates the water conduit, which conducts water to the water storage container, a connection pipe that opens in three directions and connects between the water conduit and the water supply pipe through two openings, and the connection pipe. A case, a drain plug that is detachable from the outside of the case and closes the remaining opening of the connection pipe, a filter that prevents foreign matter from entering the water supply water pipe, and water from the water storage container side and a check valve for preventing backflow, the draining plug incorporated detachably to the connection pipe while light holding the check valve and the filter, the check valve during the draining tap incorporation The connection pipe is held so as not to be detached, and the opening on the drain plug side of the connection pipe is disposed in the case, and the residual water in the connection pipe is removed when the drain plug is removed. In case With kicking water heater, water flow by preventing the filter and non-return valve from falling out drain plug the filter and check valve by removing the drain plug it can be easily performed maintenance permanently together .
[0009]
Further , water remaining in the connection pipe when the drain plug is removed can be dripped into the case so as not to get wet outside the case.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
( Reference Example 1)
1 to 3 show a hot water supply apparatus in Reference Example 1 of the present invention.
[0012]
In the figure, reference numeral 31 denotes a water supply water pipe, and this water supply water pipe 31 is connected to a first opening 32a of a connection pipe 32 having three openings. The second opening 32 b of the connection pipe 32 is connected to a water supply means 34 configured by an electromagnetic valve, a proportional on-off valve or the like in the main body unit 33.
[0013]
Further, the third opening 32c of the connection pipe 32 is closed by a detachable drain plug 35, and the drain plug 35 is projected so as to be removed from a hole 37 provided in a case 36 constituting the outer shell of the unit. It is. 38 is a filter for preventing the inflow of foreign matter from the water supply water pipe 31 attached in front of the water supply means 34. Between the water supply means 34 and the filter 38, water is supplied from the water supply means 34 side to the water supply water pipe 31 side. A check valve 39 is provided to prevent backflow. The filter 38 and the check valve 39 are inserted into the drain plug 36 through the opening 35a of the drain plug 35, and are lightly press-fitted and stored. A water conduit 40 is connected to the other end of the water supply means 34 to supply water to the water storage container 41. A heating means 42 composed of an electric heater is installed on the bottom surface of the water storage container 41 to heat the water in the water storage container 41. Denoted at 43 is a hot water supply means constituted by an electric pump, one end of which is connected to the water storage container 41 and the other end is connected to the hot water discharge path 44. Reference numeral 45 denotes a kitchen unit, and the water in the water storage container 41 can be supplied to the sink via the hot water supply path 44. Tap water can also be supplied directly to the sink.
[0014]
Next, maintenance of the above-described hot water supply apparatus will be described. While the hot water supply device is being used, foreign matter from the water supply water pipe 31 accumulates, causing the filter 38 to be clogged, or the seal portion of the check valve 39 to become clogged and need to be replaced. When removing the filter 38 and the check valve 39 for maintenance, if the drain plug 35 is removed, the filter 38 and the check valve 39 are held by the drain plug 35 and can be removed together. If the lightly press-fitted filter 38 and the check valve 39 are removed from the drain plug 35, cleaning and replacement can be performed. Thus, maintenance can be easily performed without disassembling the main unit 33.
[0015]
( Reference Example 2)
The hot water supply apparatus in Reference Example 2 of the present invention is basically the same as that in Reference Example 1, and the dimensions of the connection pipe 32 and the check valve 39 in FIGS. The check valve 39 is pressed against the water supply means 34 in the state where it is incorporated in the pipe 32 so as not to come off. Therefore, even if the filter 33 and the check valve 39 are pushed out by the water flow of the water supply pipe 31, the filter 33 and the check valve 39 are always put together when the drain plug 35 is removed. Can be removed.
[0016]
(Example 1 )
FIG. 4 shows a hot water supply apparatus in Embodiment 1 of the present invention.
[0017]
Differences from Reference Example 1 will be described with reference to the drawings. In this embodiment, the drain plug 35 side opening of the connection pipe 32, that is, the third opening 32 c is accommodated in the case 36 without protruding out of the case 36. When the drain plug 35 is removed, water remains in the connection pipe 32. However, since the third opening 32c is housed in the case 36, the remaining water drops into the case 36 and is used for maintenance. It is possible to prevent water from leaking to the outside of the case 36.
[0018]
( Reference Example 3 )
FIG. 5 shows a hot water supply apparatus in Reference Example 3 of the present invention.
[0019]
Differences from Reference Example 1 will be described with reference to the drawings. In this reference example, a stop cock 42 is attached to the first opening 32a of the connection pipe 32 and is exposed to the outside of the case 36. When the drain plug 35 is removed for maintenance, the main tap of the water supply is connected. By operating the water stopcock 42 without closing, water can be stopped only by the hot water supply device, and maintenance is easy.
[0020]
【The invention's effect】
As described above, according to the hot water supply apparatus of the present invention, three sides of the connection pipe are opened, and one of the openings is closed with a drain plug that can be detached from the outside of the case, thereby preventing the inflow of foreign matter from the water supply water pipe. A check valve that prevents back flow of water from the filter and the water storage container side is detachably held by a drain plug, and the filter and check valve can be removed by removing the drain plug. By removing the stopper, the filter and check valve can be removed together for easy maintenance.
[0021]
Further, water remaining in the connection pipe when the drain plug is removed can be dripped into the case so as not to get wet outside the case.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic configuration of a hot water supply apparatus in Reference Example 1 of the present invention. FIG. 2 is a cross-sectional view of a main part of the hot water supply apparatus. sectional view showing a schematic configuration of a main part sectional view Figure 5 the water heater in the sectional view FIG. 6 conventional example showing a schematic configuration of a water heater according to the third embodiment of the present invention the water heater according to the first embodiment of the invention Explanation of symbols]
31 Water supply pipe for water supply 32 Connection pipe 32a First opening of connection pipe 32b Second opening of connection pipe 32c Third opening of connection pipe 35 Drain plug 36 Case 38 Filter 39 Check valve 40 Water guide path 41 Water storage container 42 Stopcock

Claims (1)

A water conduit that conducts water to the water storage container, a connection pipe that opens in three directions and connects between the water conduit and the water supply pipe through two of the openings, a case that accommodates the connection pipe, and an attachment / detachment from the outside of the case A drain plug that can block the remaining opening of the connection pipe, a filter that prevents foreign matter from entering the water supply pipe, and a check valve that prevents back flow of water from the water storage container side; wherein the draining plug incorporated detachably to the connection pipe while light holding the check valve and the filter, the check valve during the draining plug built Ru held stopper in the connecting pipe In addition, a water heater in which an opening on the drain plug side of the connection pipe is disposed in the case, and when the drain plug is removed, residual water in the connection pipe is received by the case .

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