JPH10325556A - Instant hot water supplying method and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the rising of an instant hot water supplying device using a heat insulating container, and at the same time, to eliminate the waste of water which runs out during a waiting time. SOLUTION: By inserting a plurality of heat insulating containers 13, 14 in a hot water supplying piping 12 between a hot water supplying apparatus 10 and a hot water supplying faucet 11, remaining cold water in the hot water supplying piping 12 is discharged from the hot water supplying faucet 11 in steps through the heat insulating containers 13, 14. By this method, the temperature rise is quick compared with a case with one unit of the heat insulating container, and a cold water sandwich phenomenon can be eliminated or made as small as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of connecting a hot water supply heat source and a tap to a hot water supply pipe when the extension distance of the hot water supply pipe is long. The present invention relates to an instant hot water tapping method and an apparatus therefor that solve the problem that hot water does not flow out until the hot water flows out.

[0002]

2. Description of the Related Art In general, a hot water supply pipe is provided with a heat insulating coating. When a tap is used, for example, water flows out first, and then hot water comes out. This waiting time becomes longer as the length of the pipe in the middle becomes longer, and thus there is a problem that the usability is poor and water is wasted. Therefore, an instant tapping device shown in FIG. 5 has been proposed.

[0003] This instant hot water supply device comprises a hot water supply 1 and a hot water tap 2
In a hot water supply pipe 3 connecting the water heater and a tap, a warming container 4 configured to be heated by an electric heater 5 or the like is inserted into, for example, a lavatory or a kitchen. The hot water in the container 4 is discharged so that hot water can be discharged immediately. In FIG. 5, reference numeral 6 denotes a water supply pipe.

[0004]

However, in the above conventional example, if the distance from the water heater 1 to the heat retaining container 4 becomes too long, the distance from the water heater 1 to the heat retaining container 4 becomes larger than the capacity of the heat retaining container 4. Since the amount of water retained in the pipe 3 increases, and when hot water is supplied, hot water in the heat retaining container 4 first comes out, and then unheated water remaining in the pipe 3 comes out, so-called a cold water sandwich phenomenon occurs. In some cases, sufficient comfort cannot be ensured. If only a small heat insulating container 4 can be installed due to space issues, the temperature of the hot water drops within a short time after the tapping.

The present invention has been proposed in view of the above points, and provides an instant hot water tapping method and apparatus for minimizing a cold water sandwich phenomenon which is particularly problematic when a hot water supply pipe length is large. That is the purpose.

[0006]

The instant hot water tapping method and apparatus according to the present invention are as follows. 1. When a plurality of heat insulation containers are inserted in series in a hot water supply pipe connecting a heat source means and a hot water tap and the hot water tap is opened, hot water stored in the heat insulation container close to the hot water tap is discharged sequentially from the hot water. An instant tapping method in which the amount of cold water staying in a hot water supply pipe connecting the heat source means and the tap is reduced as much as possible.

[0007] 2. The middle of the hot water supply pipe connecting the heat source means and the hot water tap is branched and configured in parallel, one or more thermal insulation containers are inserted into the hot water supply pipe configured in parallel, and when the hot water tap is opened, From the hot water stored in the paralleled thermal insulation containers, hot water is simultaneously discharged one by one to reduce the amount of cold water remaining in the hot water supply pipe connecting the heat source means and the hot water tap. Immediate tapping method to reduce weight as much as possible.

[0008] 3. A single pipe part and a parallel pipe part were formed in a part of the hot water supply pipe connecting the heat source means and the hot water tap, and one or more thermal insulation containers were inserted into the single pipe part and the parallel pipe part, respectively, and the hot water tap was opened. At this time, the hot water stored in the thermal insulation container close to the hot water tap is sequentially discharged from the hot water so that the amount of cold water remaining in the hot water supply pipe connecting the heat source means and the hot water tap is reduced as much as possible. Immediate tapping method to reduce weight.

4. By inserting a plurality of insulated containers in series in a hot water supply pipe connecting the heat source means and the hot water tap, the outflow of cold water staying in the hot water supply pipe connecting the heat source means and the hot water tap is reduced as much as possible. An instant hot-water tapping device that is configured to make it hot.

[0010] 5. By configuring the middle of the hot water supply pipe connecting the heat source means and the tap water in parallel, by inserting one or more thermal insulation containers into the parallel configured pipe portion,
An instant tapping device configured to reduce as much as possible the amount of cold water flowing out of the hot water supply pipe connecting the heat source means and the tap.

6. A single pipe section and a parallel pipe section are formed in a part of the hot water supply pipe connecting the heat source means and the hot water tap, and one or more thermal insulation containers are inserted into the single pipe section and the parallel pipe section, respectively. An instant tapping device for reducing the outflow of cold water staying in a hot water supply pipe connecting the means and a tap.

7. 7. The instant tapping device according to the item 4, 5 or 6, wherein the heat source means comprises a water heater. 8. 4 or 5 or 6 above, wherein the heat source means comprises a hot water supply heater
Immediate tapping device as described. 9. 4 or 5 wherein said heat source means comprises a heat exchanger unit
Or the instant tapping device according to 6. 10. 7. The instant tapping device according to the above 4 or 5 or 6, wherein the heat source means comprises an electric water heater.

11. 11. The instant tapping device according to 4 or 5 or 6 or 7 or 8 or 9 or 10 above, wherein a heating means is incorporated in the heat retaining container. 12. 12. The instant tapping device according to the above item 11, wherein an electric heater is used as a heating means of the heat retaining container. 13. 12. The instant tapping device according to the above item 11, wherein circulating hot water is used as heating means for the heat retaining container.

14. The above-mentioned 4 or 5 or 6 or 7 or 8 or 9 which is devised so as to prevent heat from escaping from the hot water in the heat insulating container to the outside by making the heat insulating container a vacuum heat insulating structure.
Or the instant tapping device according to 10. 15. 11. The hot water tapping device according to the above 4 or 5 or 6 or 7 or 8 or 9 or 10 wherein the heat retaining container is formed or covered with a heat insulating material so that heat does not escape from the hot water in the heat retaining container to the outside. .

[0015]

[Function] In the case of the vacuum insulation structure,
Since the heat radiation is prevented, the temperature of the hot water is maintained as it is, and in the case where a heating means such as an electric heater is attached, the water is heated so as to maintain a constant temperature. For this reason, even if the staying water in the hot water supply pipe is cooled, the inside of the heat retaining container is maintained at a constant temperature, so that when the tap is opened,
The warm water in the nearest heat insulation container first discharges hot water. And
When the hot water in the thermal insulation container closest to the hot water tap starts tapping,
Due to the decrease in water pressure, hot water in the next heat insulation container flows into the nearest heat insulation container. In this way, when the heat retaining containers are inserted in series, the hot water in the heat retaining container starts to flow out one by one, whereby hot water not affected by the cold water sandwich phenomenon flows out of the hot water tap, which is comfortable. The performance is further improved. This effect is the same when a part of the hot water supply pipe is arranged in parallel and a heat retaining container is inserted therein.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heat source means includes a water heater, a heating heat source unit having a hot water supply function, a means for supplying hot water by heating water with a heat medium in a heat exchanger unit, or an electric water heater. means. The heat retaining container may have a structure that retains the temperature of the hot water by preventing the heat from escaping by making the inside a vacuum heat insulating structure, or by separately attaching a heating means, for example, to 70 to 80 ° C. It may have a structure that can be heated. Alternatively, the container itself may be formed with a heat insulating material, or the container may be covered with a heat insulating material so that heat does not escape.

[0017]

Embodiment 1 Embodiment 1 will be described in detail with reference to FIG. This embodiment corresponds to claims 1 and 4, wherein 10 is a water heater, 11 is a hot water tap, 12 is a hot water supply pipe connecting the hot water supply 10 and the hot water tap 11, and 13 and 14 are hot water supply pipes 12. The first and second thermal insulation containers are inserted in series. The thermal insulation containers 13 and 14 have a vacuum insulation structure, respectively, so that the heat of the internal warm water does not escape outside.

Reference numeral 15 denotes a water supply pipe. The tap 11 is a mixing faucet, and is capable of mixing hot water and water supplied from the water supply pipe 15 to supply hot water of any temperature. In the above embodiment, when the hot water tap 11 is opened, the hot water generated in the water heater 10 flows out of the hot water tap 11 from the hot water supply pipe 12 via the first warming container 13 and the second warming container 14.

When the tap 11 is closed, the hot water supply pipe 12 is closed.
Although hot water stays in the first and second heat retaining containers 13 and 14, the temperature of the heat retaining containers 13 and 14 is high because the first and second heat retaining containers 13 and 14 have a vacuum insulation structure. Has been maintained as it is. Therefore, the tap water 11 again
Is opened, the hot water in the second thermal insulation container 14 first flows out of the hot water tap 11 and the first thermal insulation container 1
The hot water in 3 flows into the second heat retaining container 14, and the water in the hot water supply pipe 12 flows into the first heat retaining container 13. It should be noted that the number of heat retaining containers is a minimum of two as in the present embodiment, and may be further increased according to the extension distance of the hot water supply pipe 12.

FIG. 2 shows the relationship between the elapsed time and the tapping temperature in the present embodiment and the prior art. In the present embodiment, as shown by the solid line, immediately after the tapping, the second insulated container 14 and the tapping water are discharged. Although a small amount of low-temperature water staying between the stoppers 11 flows out, the temperature rapidly rises immediately after, and reaches a peak of 45 seconds after 20 seconds.
° C, and thereafter, the first heat-insulating vessel 13 and the second heat-insulating vessel 1
The water in the hot water supply pipe 12 between the four flows into the second insulated container 14 and the water temperature drops to 34 ° C., but after 90 seconds when the hot water from the water heater 10 is supplied into the system, the water temperature becomes 50 ° C. Hot water comes out. On the other hand, in the conventional instant hot water supply device in which one heat retaining container is inserted, as shown by the dotted line, it can be seen that the rise time and the temperature are inferior to this embodiment.

[0021]

Embodiment 2 This embodiment corresponds to claims 2 and 5, and as shown in FIG. 3, the hot water supply pipe 12 is branched into a first hot water supply pipe 12a and a second hot water supply pipe 12b on the way. First
This is an example in which a heat insulating container 13 is inserted, and a second heat insulating container 14 is inserted in the other. By doing so, the heat retention capacity is increased, and it is possible to suppress a decrease in the temperature at the time of tapping and to improve the rise.

[0022]

[Embodiment 3] This embodiment corresponds to claims 3 and 6, and as shown in FIG.
And a part of the downstream side is branched to form a parallel pipe section 12d.
This is an example in which the first heat insulating container 13 is inserted into the single pipe portion 12c, and the second heat insulating container 14 is inserted into the parallel pipe portion 12d. This example is a composite of Examples 1 and 2,
It is possible to improve the rise more.

[0023]

[Embodiment 4] This embodiment corresponds to claims 10 and 11, wherein an electric heater is mounted as a heating means in the heat insulation containers 13 and 14 so that the temperature inside the heat insulation containers 13 and 14 is kept constant at all times. This is an example of maintaining the hot water temperature.

[0024]

As described above, the present invention has the following effects by inserting a plurality of heat retaining containers in series or in parallel or in a composite type in a hot water supply pipe. 1. The cold water sandwich phenomenon in which the tapping temperature drops after tapping the hot water when the amount of hot water held in the heat retaining container> the amount of cold water held in the piping can be avoided. 2. Even if the pipe extension is changed, it can be handled by a plurality of combinations of one kind of heat retaining container. 3. If a large thermal insulation container cannot be installed in one place, a plurality of small containers can be divided into a plurality of places and the applicable range is expanded. 4. The amount of time required for hot water to flow is reduced,
The amount of waste water flowing out is reduced. 5. When the heat insulation container is covered with a vacuum heat insulating structure or a heat insulating material, power consumption is eliminated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment.

FIG. 2 is an explanatory diagram of a comparative example of a change in water temperature with a lapse of time in an instant hot water supply device embodying the present invention and a conventional instant hot water supply device.

FIG. 3 is an explanatory diagram of the second embodiment.

FIG. 4 is an explanatory diagram of a third embodiment.

FIG. 5 is an explanatory view of a conventional instant tapping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hot-water supply device 11 Hot-water tap 12 Hot-water supply pipe 13 1st thermal insulation container 14 2nd thermal insulation container 15 Water supply piping

Claims (15)

[Claims] When a plurality of heat insulating containers are inserted in series in a hot water supply pipe connecting a heat source means and a hot water tap and the hot water tap is opened, the hot water stored in the heat insulating container close to the hot water tap is sequentially turned on. A hot water tapping method in which cold water staying in a hot water supply pipe connecting a heat source means and a tap is reduced as much as possible so that hot water is discharged. 2. A hot water supply pipe connecting the heat source means and the hot water tap is branched and arranged in parallel, and one or more heat insulating containers are inserted into the parallel hot water supply pipe to open the hot water tap. At the same time, cold water staying in the hot water supply pipe that connects the heat source means and the hot water tap, so that hot water is stored simultaneously in hot water that is stored in the parallelized thermal insulation container close to the hot water tap An instant tapping method that reduces the amount of runoff as much as possible. 3. A single pipe portion and a parallel pipe portion are formed in a part of a hot water supply pipe connecting the heat source means and the tap, and one or more heat insulation containers are inserted into the single pipe portion and the parallel pipe portion, respectively. When the tap is opened, the hot water stored in the insulated container close to the tap will be discharged sequentially from the hot water,
An instant tapping method in which the amount of cold water staying in a hot water supply pipe connecting a heat source means and a tap is reduced as much as possible. 4. A plurality of insulated containers are inserted in series in a hot water supply pipe connecting the heat source means and the hot water tap to reduce an outflow amount of the cold water staying in the hot water supply pipe connecting the heat source means and the hot water tap. An instant tapping device configured to reduce the weight as much as possible. 5. A hot water supply pipe connecting the heat source means and the hot water tap is formed in parallel, and one or more heat insulating containers are inserted into the parallel pipe section, so that the heat source means and the hot water tap are connected. An instant hot water supply device configured to reduce as much as possible the outflow of cold water staying in a hot water supply pipe connecting the two. 6. A single pipe section and a parallel pipe section are formed in a part of a hot water supply pipe connecting a heat source means and a tap, and one or more thermal insulation containers are inserted into the single pipe section and the parallel pipe section, respectively. Thus, an instant hot water tapping device for reducing the outflow of cold water staying in a hot water supply pipe connecting the heat source means and the tap water tap as much as possible. 7. The instant tapping device according to claim 4, wherein the heat source means comprises a water heater. 8. The heat source means comprises a hot water supply heater.
Or the instant tapping device of 5 or 6. 9. The instant tapping device according to claim 4, wherein the heat source means comprises a heat exchanger unit. 10. The instant tapping device according to claim 4, wherein the heat source means comprises an electric water heater. 11. The instant tapping device according to claim 4, wherein a heating means is incorporated in the heat retaining container. 12. The instant tapping device according to claim 11, wherein an electric heater is used as heating means for the heat retaining container. 13. The hot water tapping apparatus according to claim 11, wherein circulating hot water is used as heating means for the heat retaining container. 14. The heat insulation container has a vacuum insulation structure so that heat is prevented from escaping from hot water in the heat insulation container to the outside.
Or the instant tapping device according to 10. 15. The heat insulation container is formed or covered with a heat insulating material so as to prevent heat from escaping from hot water in the heat insulation container to the outside.
Or the instant tapping device of 9 or 10.