JPH0622864U - Heat exchanger structure of water heater - Google Patents

Abstract

(57) [Summary] [Purpose] In the heat exchange section where the heating pipe for bath water is arranged along a part of the heating pipe for hot water supply, preferential distribution of heat energy to the hot water supply side or the hot water supply side. To do. [Constitution] Water is supplied from the end of the heating pipe for hot water supply on the common heat exchange part side. Alternatively, water is supplied from the end of the heating pipe for hot water supply on the side of the heat exchange part for only the hot water supply.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchange part structure of a water heater.

[0002]

[Prior art]

 Conventionally, hot water supply provided with a heating pipe for general hot water supply to a hot water supply destination such as a shower or sink and a heating pipe for bath water for circulatingly heating the hot water in the bathtub in one heat exchange part There is a machine, and the heating pipe for bath water is arranged along a part of the heating pipe for hot water supply so that heat can be exchanged between them.

[0003]

[Problems to be solved by the device]

 However, since the heating pipes for general hot water supply and the heating pipes for bath water are arranged in one heat exchange section, it is difficult to control the heat distribution for each heating pipe. That is, when the hot water is discharged from the general hot water supply destination without heating the hot water, the heat of the hot water for the hot water is taken away and the heat energy is wasted. It becomes dangerous that hot water comes out to the bathtub side in this state due to its high temperature, and there is a problem such as boiling in the heating tube for bath water.

On the other hand, even when the hot water is circulated and heated without supplying the general hot water, the heating pipe for the general hot water is also heated, so that not only the heat energy is wasted but also the general hot water supply destination in this state. If hot water is discharged from the hot water, hot water will be discharged, which is dangerous, and boiling may occur. .

[0005] Therefore, an object of the present invention is to solve the above problems by preferentially distributing heat energy to one of the hot water supply side and the hot water supply side.

[0006]

[Means for Solving the Problems]

 According to the present invention, the common heat exchange section is provided with a heating pipe for bath water for circulating and heating the bath water in the bathtub along a part of the heating pipe for hot water supply connected to a general hot water supply destination such as a shower or sink. And a single hot water supply heat exchange part, the end of the hot water supply heating pipe on the common heat exchange part side is connected to the water supply port to the water heater, or It is intended to provide a heat exchange part structure of a water heater characterized in that an end of a heating pipe is connected to a water supply port.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment of a water heater A having a heat exchange section structure according to the present invention. The water heater A mainly comprises a common heat exchange section 1 and a burner section 4. It is connected to the water pipe through the water supply port 5, and is connected to a general hot water supply destination such as a washbasin or a shower or sink through the hot water outlet 6. Further, it is connected to the bathtub 73 through a bathtub inlet 71 and a bathtub outlet 72.

The common heat exchange unit 1 includes a hot water supply heat exchange unit 11 that communicates with the water supply port 5 and the hot water discharge port 6, and a bath water heat exchange unit 31 that communicates with the bath hot water inlet 71 and the bath hot water outlet 72. It is composed of.

As shown in FIGS. 1 and 4, the hot water supply heat exchange section 11 is provided with a hot water supply heating pipe 12 penetrating a large number of fins 61. The pipe 13 and the outer pipe 14 are configured as a double pipe, and a water amount sensor 15 and a water temperature sensor 16 are provided between the water supply port 5 and the hot water supply heating pipe 12, and the hot water supply heating pipe 12 is connected to the middle part. A boiling prevention sensor 17 and a hot water supply high-limit switch 18 are provided at the terminal end, and between the hot water supply heating pipe 12 and the hot water outlet 6, the heat exchange part outlet temperature sensor 19 and the hot water supply device are provided in this order from the upstream side. A mixing valve 21, a hot water quantity valve 22 and a hot water temperature sensor 23 are provided which are connected to the water supply port 5 via a check valve 20 provided in a bypass pipe branched from the downstream side of the temperature sensor 16.

As shown in FIGS. 1 and 4, the hot-water bath heat exchange section 31 is composed of a hot-water bath heating pipe 32 in which a fin 61 is shared above a part of the single hot-water supply heat exchange section 11. As shown in FIG. 4, the hot water heating pipe 32 is arranged along one of the five paths from one side of the hot water supply heating pipe 12 along the upper surface of the hot water supply heating pipe 12. The outer pipe 14 and the outer pipe 34 of the heating pipe 32 for bath water are welded 35 by means such as brazing so that heat can be exchanged between them. In addition, the heating pipe 32 for bath water is also configured as a double pipe by an inner pipe 33 and an outer pipe 34 that are in close contact with each other.

Then, between the bath hot water inlet 71 and the bath hot water heating pipe 32, the bath hot water temperature sensor 36, the circulation pump 37, the water flow switch 38, and the bath hot water high limit are arranged in order from the bath hot water inlet 71 side. Switch 39 is provided. The heating pipe 32 for bath water and the bath outlet 72 are directly connected via a water pipe.

With the above structure, the water supplied from the water pipe through the water supply port 5 is fed from the end of the hot water supply heating pipe 12 on the side where the hot water heating pipe 32 is provided, and It is heated in the heating pipe 12 and supplied from the tap hole 6 to a general hot water supply destination.

As shown in FIG. 4, the heating pipe 12 for hot water supply and the heating pipe 32 for bath water penetrate through the fin 61, and the lower part of the fin 61 is concentric with the heating pipe 12 for hot water supply. Is formed with a substantially semicircular downward extension portion 62, and a cut portion 63 reaching the height of the upper surface of the hot water heating tube 12 is formed between the adjacent downward extension portions 62. A substantially wave-shaped portion 64 is formed on the upper portion of the fin 61.

As shown in FIGS. 1 to 3, the burner unit 4 connects a source solenoid valve 42 and a governor-equipped proportional valve 43 in order from the upstream side to a gas pipe 40 connected to a gas supply port 41, and The tip of the pipe 40 is branched into three, and the first, second and third burners 47, 48 and 49 are connected via the first, second and third switching valves 44, 45 and 46, respectively. .

Of the burners 47, 48, 49 described above, the first burner 47 is located below the hot water heating section 66 and heats the same section 66, and the second burner 48 is located below the boundary section 67. Both the hot water heating unit 66 and the hot water heating unit 65 are heated, and the third burner 49 is designed to heat the hot water heating unit 65. In FIG. 1, 50 is a fan, and first and second. , For supplying combustion air to the third burners 47, 48, 49.

Further, 8 is a control device, 51 is an ignition transformer, 52 is a power transformer, 53 is a leakage breaker, 54 is an exhaust port, 55 is a frame rod, 56 is an ignition plug, and 57 is a drain plug.

The first embodiment of the present invention is configured as described above, and when hot water is supplied to a general hot water supply destination such as a washbasin, a shower or a sink, only the first switching valve 44 is opened and the first burner is opened. Only 47 is ignited to heat only the hot water supply heating unit 66, and a governor is attached based on the required heat quantity calculated from the difference between the set temperature and the water supply temperature measured by the water supply temperature sensor 16 and the water supply quantity measured by the water quantity sensor 15. The feed-forward control for controlling the proportional valve 43 and the feedback control for controlling the proportional valve 43 with governor based on the difference between the set temperature and the hot water temperature measured by the hot water temperature sensor 23 are used together to discharge hot water at the set temperature. To do.

When the required heat quantity cannot be covered by the first burner 47 alone, the second burner 48 and the third burner 49 are also ignited.

At this time, the water supplied from the water pipe through the water supply port 5 is heated in the hot water supply heating pipe 12 and supplied from the hot water discharge port 6 to a general hot water supply destination. Since the water is fed from the end of the hot water supply heating pipe 12 on the side where the hot water heating pipe 32 is arranged, the water in the hot water supply heating pipe 12 along the hot water supply heating pipe 32 is Temperature is low, heat conduction from the water in the hot water supply heating pipe 12 to the hot water supply heating pipe 32 in this part is reduced, and heat energy can be preferentially distributed to the hot water supply side. .

As described above, since the heat energy is preferentially distributed to the hot water supply side, the hot water does not overheat, and even if circulation heating of the hot water is started in the above state, the high temperature hot water is discharged to the bathtub. Is prevented.

When the circulating pump 37 is operated to heat the bath water, the second and third burners 48 and 49 are ignited to heat the bath water. In this case as well, the bath water is heated. Since the temperature of the water in the hot water supply heating pipe 12 along the heating pipe 32 is low, heat energy can be preferentially distributed to the hot water supply side.

FIG. 5 shows a second embodiment, in which the water heater B has substantially the same structure as that of the first embodiment, but the end portion of the hot water supply heating pipe 12 on the side of the single hot water heat exchange unit 1 side. It is different from the first embodiment in that water is supplied from the inside.

In the second embodiment, when the bath water is heated, when the circulation pump 37 is operated, the water flow switch 38 is activated and only the third switching valve 46 is opened, and only the third burner 49 is ignited. Only the hot water heating unit 65 is heated. At this time, the proportional valve with governor 43 is controlled by feedback control based on the difference between the set temperature and the bath temperature measured by the bath temperature sensor 36 to maintain the bath temperature at the set temperature.

At this time, the bath water from the bathtub 73 is heated in the bathtub heating pipe 32 and returns to the bathtub 73. At the same time, the bathtub heating pipe (12 ), The first and second burners 48, 49 are ignited. This water supply is supplied from the end of the hot water supply heating pipe 12 on the side where the hot water supply heating pipe 32 is not provided. Since the temperature is increased by heating in the bath, heat conduction from the hot water heating pipe 32 to the hot water supply heating pipe 12 can be reduced, and heat energy can be preferentially distributed to the hot water side.

In this way, since the heat energy is preferentially distributed to the hot water side, the general hot water supply side does not overheat, and even if hot water is discharged from the general hot water supply destination in the above state, hot water is discharged. It is prevented.

[0027]

[Effect of device]

 As described above, by supplying water from the end of the heating pipe for hot water supply on the side of the common heat exchange unit, when the hot water is discharged to the general hot water supply destination, the heat energy can be preferentially distributed to the hot water supply side. .

Further, by supplying water from the end of the heating pipe for hot water supply on the side of the heat exchange part for only hot water supply, even when the hot water is heated to the general hot water supply destination at the same time as heating the hot water, the heat energy is preferentially distributed to the hot water supply side. can do.

As described above, depending on the application, the water from the water supply port is fed from the end of the heating pipe for hot water supply on the side of the common heat exchange part or the opposite side, so that effective use of heat can be achieved. It is possible to prevent the danger of hot water discharge.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a configuration of a water heater having a heat exchange section structure according to the present invention (first embodiment).

FIG. 2 is a cutaway front view of the same portion.

FIG. 3 is a cutaway side view of the same portion.

FIG. 4 is a sectional view taken along line I-I of FIG.

FIG. 5 is an explanatory diagram showing a configuration of a second embodiment.

[Explanation of symbols]

 A Water heater 5 Water inlet 12 Heating pipe for hot water supply 32 Heating pipe for hot water bath 73 Bathtub

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Ishikura 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Nihon Yupro Co., Ltd. (72) Hiroki Maruyama 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Issue Nihon Yupro Co., Ltd. (72) Inventor Yoshinori Kawasaki 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Prefecture Nihon Yupro Co., Ltd. (72) Nobuhiro Nigami 43-No, Uozakihama-cho, Higashinada-ku, Kobe, Hyogo Prefecture No. 1 Nihon Yupro Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A hot water heating pipe for circulating and heating the hot water in the bathtub (73) along a part of the hot water supply heating pipe (12) connected to a general hot water supply destination such as a shower or a sink ( 32) having a common heat exchange part (1) and a hot water supply single heat exchange part (11), the end of the hot water supply heating pipe (12) on the common heat exchange part (1) side is The heat exchange structure of the water heater, which is connected to the water supply port (5) to the machine A. 2. A heating pipe for bath water for circulating and heating the bath water in the bathtub (73) along a part of the heating pipe for hot water supply (12) connected to a general hot water supply destination such as a shower or a sink ( 32) having a common heat exchange section (1) and a hot water supply heat exchange section (11), the end of the hot water supply heating pipe (12) on the hot water supply heat exchange section (11) side is
The heat exchange part structure of the water heater, which is connected to the water inlet (5) to the water heater A.