JPH0445324A - Circulating hot water supply system - Google Patents

Abstract

PURPOSE:To ensure predetermined temperature hot water capable of being supplied simultaneously with a cock being opened, by coupling a hot water supply piping and a branch piping at the end thereof on the side of the cock. CONSTITUTION:When a cock 26 is closed, hot water in a hot water storage tank 12 passes through the inside of a branch piping 22 from a main pipe 16 by a pump 40, and flows into a return support pipe 36 in the vicinity of a cock 26 and returns to a hot water storage tank 12 after passing through a return pipe 30. Thereupon, the branch piping 22 and the return support pipe 36 are coupled in the vicinity of the cock 26, so that hot water is smoothly circulated without being resident. Accordingly, the hot water from the hot water storage tank 12 is existent at all times in the vicinity of the cock 26. On the contrary, with the cock 26 opened, pressure in the piping is released, so that the hot water from the branch piping 22 is supplied from the cock 26. Thereupon, since there is not reside the cooled hot water as in the prior art, predetermined hot water is immedaitely ensured from the cock 26.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a circulating hot water system, and particularly to a circulating hot water system that has a hot water supply pipe and a return pipe that are respectively connected to a hot water storage tank, and that applies circulation pressure using a circulation pump. This invention relates to a circulating hot water system.

[Prior art]

Referring to FIG. 5, a conventional circulating hot water supply system 1 has a return pipe 5 formed in a main pipe 4 of a hot water supply pipe 3 extending from a hot water storage tank 2. As shown in FIG.

[Problem to be solved by the invention]

In such a conventional circulating hot water system, the faucet 6
When the faucet 6 is closed, hot water circulates in the main pipe 4, but remains in the branch pipe 7.Therefore, even when the faucet 6 is opened, hot water does not come out immediately.

Therefore, the main object of the present invention is to provide a circulating hot water system that allows hot water at a predetermined temperature to be obtained as soon as the faucet is opened.

(Means for solving "1lfi") This invention includes a main pipe extending from a hot water storage tank and a branch pipe whose one end is connected to a branch provided in the main pipe and whose other end is connected to a water faucet. In a circulating hot water system comprising a hot water supply pipe, a return pipe connected to the hot water supply pipe and returning to a hot water storage tank, and a means for applying circulation pressure between the hot water supply pipe and the return pipe, the hot water supply pipe and the return pipe are connected to a branch pipe. This is a circulating hot water system that is characterized by being connected at the end on the faucet side.

[Effect]

The return pipe and the hot water supply pipe are connected at the faucet side end of the branch pipe. Therefore, when the faucet is closed, the hot water in the hot water tank flows from the main pipe through the branch piping to the return pipe near the faucet by the pressure applying means, and is returned to the hot water tank again. As a result, hot water at a predetermined temperature is always present near the faucet.

〔Effect of the invention〕

According to this invention, since hot water is always present near the faucet, the hot water that has accumulated near the faucet will not be cooled down to below a predetermined temperature as in the past, and as soon as the faucet is opened, Hot water at a predetermined temperature can be obtained.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[Example] Referring to FIG. 1, a circulating hot water supply system 1 of this example
0 is configured with a branch piping system and includes a hot water storage tank 12. A hot water supply pipe 14 is connected to the lower side of the hot water storage tank 12 .

Hot water supply piping 14 includes a main pipe 16 extending from hot water storage tank 12 .

Branch portions I8 for branch piping are formed on the wall of the main pipe 16 at predetermined intervals. Further, on the pipe wall of the main pipe 16, branch parts 2 for return branch pipes are provided at positions communicating with the branch parts 18.
0 is formed. A flexible branch pipe 22 made of a resin such as polybutene is connected to the branch part 18, and a water faucet 26 is attached to the distal end thereof via a joint 24.

Further, a return pipe 28 is connected to the upper side of the hot water storage tank 12 . The return pipe 28 is a main return pipe 30 extending from the hot water storage tank 12.
A return branch pipe 36 is connected to the main return pipe 30 by joints 32 and 34. Like the branch pipe 22, the return branch pipe 36 is formed of a flexible pipe made of resin such as polybutene, communicates with the branch part 20, and is coaxially arranged inside the branch pipe 22. And branch pipe 2
2 and the return branch pipe 36 are connected at the end of the branch pipe 22, that is, near the faucet 26. That is, the branch pipe 22 and the return branch pipe 36 are configured as a double pipe extending from the branch portion 18 to the vicinity of the faucet 26. In addition, the branch part 20 and the return branch pipe 3
A seal ring 38 is inserted between the housing and the housing 6 to ensure watertightness. A pump 40 that applies circulation pressure between the hot water supply pipe 14 and the return pipe 28 is inserted into the main pipe 16 .

In the circulating hot water system 10 formed in this manner, when the faucet 26 is closed, the hot water in the hot water tank 12 passes through the main pipe 16 and the branch pipe 22 by the pump 4o, and returns near the faucet 26 to the branch pipe 36. into the return pipe 3
0 and returns to the hot water tank 12. At this time, since the branch pipe 22 and the return branch pipe 36 are connected near the faucet 26, the hot water circulates smoothly without stagnation. Therefore, hot water from the hot water tank 2 is always present near the faucet 26.

On the other hand, when the faucet 26 is opened, the pressure inside the pipe is released, so hot water from the branch pipe 22 is supplied from the faucet 26. At this time, since cold hot water is not accumulated as in the conventional case, hot water at a predetermined temperature is immediately obtained from the faucet 26.

Further, referring to FIG. 2, a circulating hot water supply system lO' according to another embodiment is constructed using a header piping system.

That is, the header 4 is installed at the end of the main pipe 16 of the hot water supply pipe 14.
2 are connected, and branch portions 1B and 20 are formed on the wall surface of the header 42. Further, a header 44 is connected to the end of the main return pipe 30 of the return pipe 28, and a branch part 46 corresponding to the branch part 20 is formed on the wall surface of the header 44. A branch pipe 22 is connected to the branch part 18 of the header 42, and a return branch pipe 36 that communicates with the branch part 20 is connected to the branch part 46.
is connected. The rest of the structure is the same as in the previous embodiment. In this embodiment as well, the same effects as in the previous embodiment can be obtained.

Furthermore, in each of the embodiments described above, instead of using a flexible tube for the branch pipe 22, a metal branch pipe 48 as shown in FIG. 3 may be used. In this case, by connecting the branch pipes 48 to each other using appropriate joints 50 such as elbows, any pipe arrangement becomes possible.

Further, in each of the above embodiments, a double pipe in which the branch pipe 22 and the return branch pipe 36 are coaxially arranged is used. However, as shown in FIG. 4, if a three-way joint 52 is used as the joint to which the faucet 26 is attached, and the branch pipe 58 and the return pipe 60 are connected to the sockets 54 and 56, respectively, the branch pipe 58 and the return pipe 60 are connected to the sockets 54 and 56, respectively. The branch pipe 60 can be piped separately, and the same effects as in the previous embodiment can be obtained without using a double pipe.

In addition, in each of the above-mentioned embodiments, the same effect can be obtained even if the hot water supply pipe 14 and the return pipe 28 are used in reverse.

[Brief explanation of drawings]

FIG. 1 is an illustrative view showing an embodiment of the present invention. FIG. 2 is an illustrative view showing another embodiment of the invention. FIG. 3 is an illustrative view showing a modification of the branch pipe. FIG. 4 is an illustrative view showing a modification of the hot water supply pipe and the return pipe. FIG. 5 is an illustrative diagram showing the prior art. In the figure, 10.10' is a circulating hot water system, 1
2 is a hot water storage tank, 14 is a hot water supply pipe, 16 is a main pipe, 1B, 20
．． 46 is a branch part, 22.48.58 is a branch pipe, 26 is a faucet, 28 is a return pipe, 32° 34.50.52 is a joint,
36.60 is a return branch pipe, 40 is a pump, and 42.44 is a header. Patent Applicant Kubota Co., Ltd. Agent Patent Attorney Yama 1) Righteous Person Diagram Diagram

Claims (1)

[Scope of Claims] A hot water supply pipe including a main pipe extending from a hot water storage tank and a branch pipe having one end connected to a branch provided on the main pipe and a water faucet attached to the other end, and connected to the hot water supply pipe. In the circulating hot water system, the hot water supply system includes a return pipe that returns to the hot water storage tank, and a pressure applying means that applies circulating pressure between the hot water supply pipe and the return pipe, wherein the hot water supply pipe and the return pipe are connected to the branch pipe. A circulation type hot water supply system, characterized in that the water supply system is connected at an end thereof on the faucet side.