JP2000192520A - Piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce initial cold water in a piping structure to supply warm water from a hot water supply main pipe to equipment. SOLUTION: A circulating branch pipe 2 is branched from a branching part S on a downstream side of a hot water supply main pipe 1 to connect to a confluent part T on an upstream side of the hot water supply main pipe 1, and the circulating branch pipe 2 is connected with each equipment (a), (b) and (d). Warm water that flows the hot water supply main pipe 1 is joined with the warm water of the hot water supply main pipe 1 in the confluent part T after flowing the circulating branch pipe 2 by separating from the branching part S, for maintaining in a state that the warm water flows in the circulating branch pipe 2. The circulating branch pipe 2 can be arranged so as to pass by the equipment, so that the length of a connecting pipe 3 for connecting between the equipment and the circulating branch pipe 2 can be shortened, and the amount of early cold water can be reduced far as compared with the conventional case. The warm water is surely circulated in the circulating branch pipe 2 by moderately squeezing a pipe diameter of the confluent part T of the hot water supply main pipe 1 and the circulating branch pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for supplying hot water from a hot water supply main pipe to equipment, and an object thereof is to reduce initial cold water.

[0002]

2. Description of the Related Art As shown in FIG. 3, water is supplied through a water supply pipe 5 to hot and cold water mixing faucets a and b installed in a bathtub A and a basin B and a hot water washing device d installed in a toilet D. It is necessary to supply not only hot water but also hot water. As a means for supplying hot water to these equipment, the hot water supply main pipe 1 is guided from a hot water supply source, a branch portion S is provided in the middle of the hot water supply main pipe 1 to branch the hot water supply branch pipe 4, and the hot and cold water mixing faucet is provided. Conventionally, a piping structure in which various equipment such as a and b and a hot water washing device d are connected to the hot water supply branch pipe 4 has been employed.

[0003]

In the conventional piping structure shown in FIG. 3, the hot water mixing faucets a and b and the hot water cleaning device are provided from the hot water main pipe 1 via the hot water branch pipe 4. The flow path length up to d or the like is long. For this reason, there is a problem that the temperature of the hot water stagnating in the pipes to these equipments decreases, and the amount of initial cold water discharged at the start of the next use increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a piping structure capable of reducing initial cold water. And a circulation branch pipe connected to the downstream side of the hot water supply main pipe is provided, and the middle of the circulation branch pipe is communicated with the equipment.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows an example of a piping structure according to the present invention, which is installed in a hot-water mixing faucet a installed in a bathtub A and a basin B. Hot and cold water mixing faucet b and hot water washing device d installed in toilet D
And the like to supply hot water from the hot water supply main pipe 1 to various equipment such as. The characteristic of this piping structure is that a circulation branch pipe 2 is provided which branches from a branch S on the downstream side of the hot water supply main pipe 1 and is connected to a junction T on the upstream side of the main pipe 1 for hot water supply.
And the equipment a, b, and d. A water supply pipe 5 for supplying water is connected to each equipment.

[0006] Based on this configuration, the hot water flowing through the hot water supply main pipe 1 is split at the branch portion S, flows through the circulation branch pipe 2, and then merges with the hot water of the hot water supply main pipe 1 at the junction T. I do. That is, the state in which the warm water flows in the circulation branch pipe 2 is maintained. The circulation branch pipe 2 can be disposed so as to pass near equipment such as hot and cold water mixing faucets a and b and a hot water washing device d. Therefore, these equipment and the circulation branch pipe 2 are connected. The length of the connecting pipe 3 can be shortened, so that the amount of the initial cold water can be made much smaller than before.

In this embodiment, the diameter of the junction T between the hot water supply main pipe 1 and the circulation branch pipe 2 is appropriately reduced, and the hot water supply main pipe 1
It was designed to slightly increase the flow path resistance with respect to the hot water flow downstream of the branch S with the circulation branch pipe 2 in the above. Therefore, since a slight flow resistance is applied to the junction T downstream of the branch S, the hot water flowing through the hot water supply main pipe 1 is easily diverted at the branch S, and as a result, the hot water is circulated to the circulation branch pipe. 2
It is ensured that it is circulated in the inside. The degree of throttling at the junction T may be set as appropriate according to the ratio of the pipe diameter of the circulation branch pipe 2 to the pipe diameter of the hot water supply main pipe 1 and the supply pressure of hot water.

[Second Embodiment] In the first embodiment, a single circulation branch pipe 2 branched from a hot water supply main pipe 1 is shared as a means for supplying hot water to each equipment. As shown in FIG. 2, it is also possible to provide a dedicated circulation branch pipe 2 for each equipment. That is, for example, bathtub A
Hot water mixing faucet a, basin B hot water mixing faucet b, and
When equipment such as a hot water washing device d is provided in the toilet D, a branch portion S and a junction T are formed at locations relatively close to these equipment in the hot water supply main pipe 1, and a plurality of circulation branch pipes 2 are formed. The equipment a, b, and d are connected to the circulation branch pipe 2 closest to each equipment. Such a configuration is useful when the distance between the hot water supply main pipe 1 and the equipment is short and the length of the circulation branch pipe 2 can be reduced.

[0009]

According to the piping structure of the present invention, the circulation branch pipe is provided as means for supplying hot water from the hot water supply main pipe to various equipment, and the hot water flows in the circulation branch pipe. Can be made much less than before.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a piping structure according to the present invention.

FIG. 2 is a schematic view showing a second embodiment of the piping structure according to the present invention.

FIG. 3 is a schematic view showing a conventional piping structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hot water supply main pipe 2 ... Circulation branch pipe 3 ... Connection pipe 4 ... Hot water supply branch pipe 5 ... Water supply pipe A ... Bathtub B ... Wash basin D ... Toilet bowl
a, b: hot and cold water mixing faucet d: hot water washing device S: branch part T: junction

Continuing from the front page (72) Inventor Masafumi Arakawa 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Ken Nori 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation ( 72) Inventor Motohiro Nishiuchi 5-1-1 Koie Honcho, Tokoname, Aichi Prefecture Inax Corporation (72) Inventor Masato Taketo 5-1-1 Koie Honcho, Tokoname City, Aichi Prefecture Inax Corporation (72) Inventor Tanaka Nobuyuki 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Naoto Yamada 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term in Inax Corporation 2D060 AA01 AA07 AB03

Claims (1)

[Claims] 1. A piping structure for supplying hot water from a hot water supply main pipe to equipment, comprising a circulation branch pipe branched from an upstream side of the hot water supply main pipe and connected to a downstream side of the hot water supply main pipe. A piping structure wherein a part of the pipe is communicated with the equipment.