JP2007291741A - Piping system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping system which can shorten the time period for waiting for hot water fed to water section facilities while ensuring a water flow rate fed to the water section facilities. <P>SOLUTION: According to the piping system, a hot water feeder 11 has a first main pipe 12 connected thereto, which first main pipe 12 is then branched and connected to a plurality of branch pipes 15 via first headers 13 or joints 14, and the water section facilities are connected to the branch pipes 15, respectively, whereby hot water is fed to the water section facilities. On the other hand, a water feeding source 23 has a second main pipe 24 connected thereto, which second main pipe 24 is then branched and connected to the branch pipes 15 via second headers 25 or the joints 14, and the water section facilities are connected to the branch pipes 15, respectively, whereby water is fed to the water section facilities. Herein an internal diameter of the first main pipe 12 is set smaller than the internal diameter of the second main pipe 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a piping system having a short hot water waiting time for hot water supplied to a watering facility while maintaining the flow rate of water supplied to the watering facility in a hot water supply and water supply system piping system.

  Conventionally, as this type of piping system, a header-type water supply pipe is known in which a main pipe is branched into a plurality of branch pipes via a header, and these branch pipes are connected to corresponding watering equipment (for example, , See Patent Document 1). In other words, the diameter of the main pipe is set according to the diameter of the water meter installed outdoors and the frequency of simultaneous use of the watering equipment, so that it is almost the same as or smaller than the diameter of the header body, and the diameter of the branch pipe Is made smaller than the diameter of the header body according to the amount of water required for the watering equipment. In addition, it is possible to secure an appropriate amount of water with a watering facility.

In addition, individual flow characteristics for each branch pipe of the water supply pipe supplying water to each faucet for each application in the dwelling unit from the main water supply pipe through the water meter and each branch pipe of the hot water supply pipe supplying water to each faucet from the water heater There is known a water supply and hot water supply pipe system provided with a constant flow rate device having a constant flow rate (for example, see Patent Document 2).
JP 2001-146772 (pages 2 and 4) JP-A-8-296258 (pages 2 and 3)

  However, the header type water supply pipe described in Patent Document 1 has the following problems. That is, with such a header type water supply pipe, it is possible to secure an appropriate amount of water in the water supply equipment, but when the header type water supply pipe is applied to a hot water supply pipe, the amount of water tends to increase, and the required temperature There was a disadvantage that the hot water waiting time until hot water was obtained was long. Therefore, in both hot water supply and water supply, sufficient hot water or water is ensured by the watering equipment, and the hot water waiting time in the case of hot water supply cannot be shortened.

  Further, in the water supply and hot water supply piping system described in Patent Document 2, an individual constant flow device is provided for each faucet, and a necessary amount of hot water or water is supplied to each constant flow device. In addition, hot water at a required temperature must be supplied. However, such a point is not clarified in Patent Document 2, and in particular, a means for shortening the hot water waiting time is unclear, and a constant flow of hot water or water is simply supplied to each faucet with a constant flow meter. It ’s just that.

  Therefore, an object of the present invention is to provide a piping system capable of shortening the hot water waiting time of hot water supplied to a watering facility while maintaining the flow rate of water supplied to the watering facility. is there.

  In order to achieve the above object, the piping system of the invention according to claim 1 connects the first main pipe to the water heater and connects the first main pipe with a joint or through the joint. A plurality of branch pipes are branched and connected to each branch pipe, and hot water is supplied to the water supply equipment, and the second main pipe is connected to the water supply source, and the second main pipe has a joint. A piping system configured to branch-connect a plurality of branch pipes via a header or a joint, connect a water supply facility to each branch pipe, and supply water to the water supply facility. The inner diameter of the main pipe is set to be equal to or smaller than the inner diameter of the second main pipe.

  A piping system according to a second aspect of the present invention is the invention according to the first aspect, wherein the branch pipe on the hot water supply side is connected to the first main pipe via a header, and the branch pipe on the water supply side is a header It is connected to the 2nd main piping via.

  According to a third aspect of the present invention, there is provided the piping system according to the first aspect, wherein the hot water supply side branch pipe is connected to the first main pipe via a joint, and the water supply side branch pipe is a joint. It is connected to the 2nd main piping via.

  A piping system according to a fourth aspect of the invention is characterized in that, in the invention according to any one of the first to third aspects, the seal of the branch pipe in the joint seals the outer peripheral surface of the branch pipe. To do.

According to the present invention, the following effects can be exhibited.
In the piping system according to the first aspect of the present invention, the inner diameter of the first main pipe connected to the water heater is set to be smaller than the inner diameter of the second main pipe connected to the water supply source. For this reason, the cross-sectional area of the first main pipe is smaller than the cross-sectional area of the second main pipe, and the flow rate of hot water heated by the water heater in the first main pipe increases. Therefore, the hot water waiting time can be shortened for the hot water supplied to the watering facility. Moreover, since the internal diameter of the 2nd main piping connected to a water supply source is not different from the past, the flow volume of the water supplied to watering equipment can be maintained.

  In the piping system according to the second aspect of the invention, the branch pipe on the hot water supply side is connected to the first main pipe via the header, and the branch pipe on the water supply side is connected to the second main pipe via the header. Yes. Thus, by using a header, the hot water or water supplied from a hot water supply device or a water supply source is once stored in the header and then branched to each branch pipe. Therefore, in addition to the effect of the invention according to claim 1, it is possible to suppress variations in the flow rate of hot water or water and the hot water temperature in a plurality of water facilities.

  In the piping system of the invention according to claim 3, the hot water supply side branch pipe is connected to the first main pipe via the joint, and the water supply side branch pipe is connected to the second main pipe via the joint. Yes. In this case, each branch pipe is directly connected to the first main pipe or the second main pipe via a joint. Therefore, in addition to the effect of the invention according to claim 1, since there is no resistance due to the header, the flow rate of hot water and water to each watering facility can be increased, and the hot water hot water waiting time can be shortened. .

  The piping system of the invention according to claim 4 has a structure in which the seal of the branch pipe in the joint is sealed on the outer peripheral surface of the branch pipe. For this reason, compared with the structure which the seal | sticker in a joint seals with the internal peripheral surface of branch piping, the flow path of hot water or water can be expanded. Therefore, in addition to the effect of the invention according to any one of claims 1 to 3, it is possible to increase the flow rate of hot water and water to each watering facility.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are considered to be the best of the present invention will be described in detail with reference to the drawings.
First, a header construction method for connecting a water heater or a water supply source and each water supply facility through a header will be described. As shown in FIG. 1, one end of the first main pipe 12 is connected to the water heater 11, and the other end is connected to a joint 14 provided at the end of the first header 13. Seven joints 14 are connected to the side portion of the first header 13, one end of a branch pipe 15 is connected to each joint 14, and the other end is a bathroom facility 16, a toilet facility 17, a shower facility as a watering facility. 18, bath equipment 19, laundry equipment 20, heating equipment 21, and kitchen equipment 22.

  On the other hand, one end of the second main pipe 24 is connected to the water supply source 23, and the other end is connected to the joint 14 provided at the end of the second header 25. Seven joints 14 are screwed to the side of the second header 25. A branch pipe 15 is connected to each joint 14, and is connected to each joint 14 of a washing facility 16, a toilet facility 17, a shower facility 18, a bath facility 19, a washing facility 20, a heating facility 21, and a kitchen facility 22 as a watering facility. It is connected. In the header method, in particular, the inner diameter of the first main pipe 12 is set to be smaller than the inner diameter of the second main pipe 24 in order to reduce the hot water waiting time of the hot water facilities.

  Next, a branching method for branching and connecting the water heater 11 or the water supply source 23 and each water supply facility via the joint 14 will be described. As shown in FIG. 2, one end of the first main pipe 12 is connected to the water heater 11, and the other end is connected to a branch joint (cheese) 14 located on the watering equipment side. One end of a branch pipe 15 is connected to the joint 14, and the other end of the branch pipe 15 is a washing facility 16, a toilet facility 17, a shower facility 18, a bath facility 19, a laundry facility 20, a heating facility 21, It is connected to each joint 14 provided in the kitchen facility 22.

  On the other hand, one end of the second main pipe 24 is connected to the water supply source 23, and the other end is connected to a branch joint (cheese) 14 located on the water supply facility side. One end of a branch pipe 15 is connected to the joint 14, and the other end of the branch pipe 15 is a washing facility 16, a toilet facility 17, a shower facility 18, a bath facility 19, a laundry facility 20, a heating facility 21, It is connected to each joint 14 provided in the kitchen facility 22. In the branching method, in particular, the inner diameter of the first main pipe 12 is set to be smaller than the inner diameter of the second main pipe 24 in order to shorten the hot water waiting time of the hot water in the watering facility.

  Next, the joint 14 will be described. The joint 14 includes an outer diameter seal joint that seals at the outer periphery of the pipe (pipe) and an inner diameter seal joint that seals at the inner periphery of the pipe. First, the outer diameter seal joint will be described.

  As shown in FIG. 3, a step portion 31 b is formed on the inner peripheral surface of the through hole 31 a of the joint body 31 constituting the joint 14, and the inner end portion of the inner cylinder 32 inserted into the through hole 31 a is formed. The formed flange portion 32a is in contact. Seal rings 33 are accommodated in a plurality (two in this embodiment) of annular grooves 31 c formed on the inner peripheral surface of the through hole 31 a of the joint body 31. A pair of retaining rings (lock rings) 34 are engaged with the stepped portion 31d at the opening end of the joint body 31 via a spacer 35, and a female screw hole 31e formed on the inner peripheral surface of one end of the joint body 31. The outer peripheral edge of the retaining ring 34 is held at a predetermined position by a tightening nut 36 screwed into the retaining ring 36.

  The retaining ring 34 includes an annular base ring 34a on the outer peripheral side and a plurality of holding claws 34b that are bent from the inner peripheral portion of the base ring 34a and extend obliquely. The retaining ring 34 is formed of stainless steel with a thickness of 0.2 to 0.4 mm, the holding claw 34b is inclined in the pipe insertion direction, and the inclination angle (inclination angle with respect to the axial direction of the joint body 31) is about 45. Is set to degrees. A male screw portion 37 is threaded on the outer peripheral surface of the other end portion (left end portion in FIG. 3) of the joint main body 31 so that it can be screwed into a pipe body such as a header or piping.

  A pipe such as the branch pipe 15 is inserted into a pipe insertion space 38 formed between the outer peripheral surface of the inner cylinder 32 and the inner peripheral surfaces of the joint body 31 and the tightening nut 36. 14 can be connected to the pipe. The pipe is made of a synthetic resin such as polyolefin (cross-linked polyethylene, polybutene, etc.) or a metal such as an alloy (brass, bronze, etc.). In this connected state, the holding claw 34 b of the retaining ring 34 bites into the outer peripheral surface of the pipe, so that the pipe does not come out of the insertion space 38.

  Next, the inner diameter seal joint will be described. As shown in FIG. 4, a male thread portion 37 that is screwed into a pipe body such as a header or piping is provided at the base end portion of the joint body 31, and a guide tube portion 41 that is reduced in diameter and extends at the distal end portion. Is provided. The joint body 31 is formed in a substantially cylindrical shape, and hot water or water circulates through the internal through hole 31a. An end portion of a pipe is externally fitted to the guide tube portion 41 and connected thereto. A substantially cylindrical barrel 43 constituting the joint body 31 is connected to the distal end side of the joint body 31 by a screwed relationship between a male screw and a female screw.

  A tightening nut 36 constituting the joint body 31 is screwed into the threaded portion 44 on the outer periphery of the front end of the body cylinder body 43, and the front end surface of the body cylinder body 43 and the first step portion 45 on the inner periphery of the tightening nut 36. A base ring 34a of the retaining ring 34 is held therebetween. On the inner peripheral surface of the tightening nut 36, a second step portion 46 is formed that is connected to the tip side from the first step portion 45, and an inclined surface 47 that is connected to the tip side from the second step portion 46 is formed. Yes. An insertion space 38 into which a pipe is inserted is formed in a space between the outer peripheral surface of the guide tube portion 41 and the inner peripheral surface of the body tube body 43 and the tightening nut 36.

  A metal auxiliary ring 48 is interposed between the retaining ring 34 and the second step portion 46 and the inclined surface 47 of the tightening nut 36 in the inner space of the tightening nut 36. The auxiliary ring 48 is formed in a substantially C shape when viewed from the axial direction and can be reduced in diameter. The auxiliary ring 48 tightens the contact portion 49 that comes into contact with the holding claw 34b of the retaining ring 34 and is biased in the direction of diameter reduction by the diameter of the holding claw 34b, and the pipe inserted into the insertion space 38 from the periphery. And a tightening portion 50 for preventing the lever from coming off. The contact portion 49 of the auxiliary ring 48 is formed with an inclined surface having an inclination angle of about 45 degrees, and when the pulling force is applied to the inserted pipe and the inclination of the holding claw 34b of the retaining ring 34 is increased, the holding claw 34b. The inclination of the is to be limited.

  A holding protrusion 51 is provided on the outer peripheral surface of the proximal end side of the auxiliary ring 48 so as to extend in a direction orthogonal to the axial direction of the auxiliary ring 48 and engage with the base ring 34 a of the retaining ring 34. It is held so as not to tilt. The base ring 34 a of the retaining ring 34 is held between the distal end surface of the barrel body 43 and the proximal end surface of the holding projection 51 of the auxiliary ring 48. In this case, a gap is formed between the front end surface of the outer peripheral portion of the base ring 34a and the first step portion 45 of the tightening nut 36, so that the retaining ring 34 can be turned by turning the pipe. . Two annular grooves 52 are formed in the base end side of the guide tube portion 41, and seal rings 33 having different shapes are fitted into the guide tube portion 41. The pipes inserted into the outer peripheral surface of the guide tube portion 41 and the insertion space 38 are inserted. Hot water or water is sealed between the inner peripheral surface.

  When a pipe such as the branch pipe 15 is inserted into the insertion space 38 from the opening end of the tightening nut 36, the pipe passes through the auxiliary ring 48 and slides on the holding claw 34b of the retaining ring 34. The innermost part of the insertion space 38 is stopped while being expanded in diameter. At this time, since the inner diameter of the auxiliary ring 48 is set to be larger than the outer diameter of the pipe, there is no resistance when the pipe is inserted, and there is only one retaining ring 34 when passing through the retaining ring 34. There is little resistance, and piping can be inserted smoothly.

  In this state, when a pulling force is applied to the pipe, the holding claw 34b of the retaining ring 34 bites into the outer peripheral portion of the pipe, and the inclination angle of the holding claw 34b with respect to the axial direction increases. Therefore, a force due to the inclination of the holding claw 34b is applied to the inclined surface of the contact portion 49 of the auxiliary ring 48, and the auxiliary ring 48 is urged in the diameter reducing direction (inward) and simultaneously urged toward the distal end side. At this time, since the tapered surface of the auxiliary ring 48 is engaged with the inclined surface 47 of the tightening nut 36, the tip of the auxiliary ring 48 moves obliquely downward along the inclined surface 47 of the tightening nut 36. Therefore, the tightening portion 50 of the auxiliary ring 48 presses and tightens the outer peripheral surface of the pipe.

  Next, the first header 13 and the second header 25 will be described. As shown in FIG. 5, the first header 13 or the second header 25 includes a header body 55 having a substantially cylindrical shape, and a plurality (seven in this embodiment) of female screws opened at the side of the header body 55. A plurality of (seven in this embodiment) joints 14 are screwed and connected to the holes 56. The header body 55 is formed of a metal material or a resin material, and a flow path 57 extending in the axial direction of the header body 55 is formed therein. A female screw hole 56 is formed at both open ends of the header body 55, the first main pipe 12 or the second main pipe 24 is connected to the female screw hole 56 at one end via the joint 14, and the female screw hole at the other end. A closing member (not shown) is screwed to 56. A branch pipe 15 is connected to the joint 14 on the side of the header body 55.

  Now, the operation of the present embodiment will be described. In the header construction method, hot water obtained by operating the water heater 11 passes through the first main pipe 12 and is temporarily stored in the first header 13, from which seven branches are branched. The water is branched into the pipe 15 and supplied to each water facility. On the other hand, the water supplied from the water supply source 23 passes through the second main pipe 24, is temporarily stored in the second header 25, and then is branched into seven branch pipes 15 to be supplied to each water supply facility.

  In the branching method, hot water from the water heater 11 is supplied to each water supply facility through the first main pipe 12, the joint 14 and the branch pipe 15. On the other hand, the water supplied from the water supply source 23 is supplied to each water supply facility through the second main pipe 24, the joint 14 and the branch pipe 15.

  In both the header construction method and the branch construction method, the first main piping is set by setting the inner diameter of the first main piping 12 on the hot water supply side to be smaller than the inner diameter of the second main piping 24 on the water supply side. 12 can be made smaller than the cross-sectional area of the second main pipe 24. For this reason, the hot water heated by the water heater 11 has an increased flow velocity in the first main pipe 12 as compared with the case where the inner diameter of the first main pipe 12 is the same as the inner diameter of the second main pipe 24. The hot water waiting time can be shortened for the hot water supplied to the water supply facility, and the hot water temperature can be kept high. In this case, since the inner diameter of the second main pipe 24 connected to the water supply source 23 is not different from the conventional one, the flow rate of the water supplied to each water supply facility can be maintained.

The effects exhibited by the embodiment described in detail above will be collectively described below.
In the piping system of the present embodiment, the inner diameter of the first main pipe 12 connected to the water heater 11 is set to be smaller than the inner diameter of the second main pipe 24 connected to the water supply source 23. Therefore, the hot water waiting time can be shortened for hot water supplied to each watering facility, and the flow rate of water supplied to each watering facility can be maintained. In particular, the inner diameter of the first main pipe is 10 to 14 mm (port size 13A: inner diameter is 12.8 mm), and the inner diameter of the second main pipe is 15 to 22 mm (port diameter 16A: inner diameter is 16.2 mm, port diameter 20A: inner diameter is 20.5 mm). Furthermore, it is most preferable that the inner diameter of the first main pipe 12 is 10 to 14 mm (caliber 13A: inner diameter is 12.8 mm), the hot water supply side is a branch method, and the water supply side is a header method.

  A header construction method in which the hot water supply side branch pipe 15 is connected to the first main pipe 12 via the first header 13, and the water supply side branch pipe 15 is connected to the second main pipe 24 via the second header 25. Thus, hot water or water supplied from the water heater 11 or the water supply source 23 is temporarily stored in the header body 55 and then branched to each branch pipe 15. Accordingly, it is possible to suppress variations in the flow rate of hot water or water and the hot water temperature in a plurality of water facilities.

  A branch construction method in which the hot water supply side branch pipe 15 is directly connected to the first main pipe 12 via the joint 14 and the water supply side branch pipe 15 is directly connected to the second main pipe 24 via the joint 14. Is adopted. In this case, since there is no resistance (stagnation) due to the first header 13 or the second header 25, the flow rate of hot water and water to each watering facility can be increased, and the hot water hot water waiting time can be shortened. it can.

  The seal of the branch pipe 15 in the joint 14 is sealed on the outer peripheral surface of the branch pipe 15. For this reason, compared with the structure where the seal | sticker in the coupling 14 seals with the internal peripheral surface of the branch piping 15, the flow path of hot water or water can be expanded. Therefore, it is possible to increase the flow rate of hot water and water to each facility around the water.

The embodiment will be described more specifically with reference examples, examples and comparative examples, but the present invention is not limited to these examples.
First, a reference example for ascertaining trends in hot water waiting time, hot water, and water flow rate in a watering facility in the piping system of the present invention will be described. In each example, the water pressure (original pressure) was constant at 0.2 MPa.
[Flow rate on the water supply side when shower equipment 18 is used individually]
(Reference Examples 1-3)
In the header construction method, only the shower facility 18 was fully opened as a watering facility, and the others were set as shown below, and the flow rate on the water supply side was measured. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 1: Header construction method, the diameter of the second main pipe 24 is 20A (inner diameter is 20.5 mm) and the length is 8 m. The result is shown in FIG.
Reference Example 2: Header method, diameter 13A of the second main pipe 24 (inner diameter is 12.8 mm) and length 2 m. The result is shown in FIG.

Reference Example 3: Header construction method, the diameter of the second main pipe 24 is 16A (inner diameter is 16.2 mm) and the length is 5 m. The result is shown in FIG.
From these results, almost no change in the flow rate of water due to the inner diameter of the second main pipe 24 was observed for each of the outer diameter seal and the inner diameter seal. Further, the flow rate of water was larger for the outer diameter seal than for the inner diameter seal regardless of the inner diameter of the second main pipe 24.
(Reference Examples 4 to 6)
In the branch method, only the shower facility 18 was fully opened as a watering facility, and the others were set as shown below, and the flow rate on the water supply side was measured. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 4: Branch method (four branches), diameter 20A and length 9.2 m of the second main pipe 24. The result is shown in FIG.
Reference Example 5: Branch method (four branches), the diameter of the second main pipe 24 is 13A and the length is 9.2 m. The result is shown in FIG.

Reference Example 6: Branch method (four branches), diameter 16A and length 9.2 m of the second main pipe 24. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the flow rate of water increased as the inner diameter of the second main pipe 24 increased. Further, the flow rate of water was larger for the outer diameter seal than for the inner diameter seal regardless of the inner diameter of the second main pipe 24. Furthermore, in the branching method of Reference Examples 4 to 6, the flow rate of water was almost the same as that of the header method of Reference Examples 1 to 3.
(Reference Examples 7-9)
In the branch method, only the shower facility 18 was fully opened as a watering facility, and the others were set as shown below, and the flow rate on the water supply side was measured. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 7: Branch method (7 branches), diameter 20A and length 9.2 m of the second main pipe 24. The result is shown in FIG.
Reference Example 8: Branch method (7 branches), diameter of the second main pipe 24 (13A) and length 9.2 m. The result is shown in FIG.

Reference Example 9: Branch method (7 branches), diameter 16A and length 9.2 m of the second main pipe 24. The result is shown in FIG.
When the results of Reference Examples 7 to 9 were compared with the results of Reference Examples 4 to 6, the results were almost equivalent, and there was almost no change in the branching method between the case of 4 branches and the case of 7 branches.
[Flow rate on the water supply side when the shower facility 18 and the kitchen facility 22 are used simultaneously]
(Reference Examples 10-12)
In the header method, the shower equipment 18 is fully opened as a watering equipment, the water flow rate at the kitchen equipment 22 is set to 6 (L / min), and the others are set as shown below to measure the flow rate on the water supply side. did. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 10: Header method, diameter 20A of second main pipe 24, length 2m, and diameter 13A of branch pipe 15. The result is shown in FIG.
Reference Example 11: Header method, diameter 13A of the second main pipe 24, its length 2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 12: Header method, diameter 16A of second main pipe 24, length 2m, and diameter 13A of branch pipe 15. The result is shown in FIG. 9 (b).
From these results, there was almost no change in the flow rate of water due to the inner diameter of the second main pipe 24 for each of the outer diameter seal and the inner diameter seal. Further, the flow rate of water was larger for the outer diameter seal than for the inner diameter seal regardless of the inner diameter of the second main pipe 24. Furthermore, in the case of simultaneous use of Reference Examples 10 to 12, the flow rate of water was lower than in the case of individual use of Reference Examples 1 to 3.
(Reference Examples 13-15)
In the branch method, only the shower facility 18 was fully opened as a watering facility, and the others were set as shown below, and the flow rate on the water supply side was measured. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 13: Branch method (four branches), the diameter 20A of the second main pipe 24, the length 9.2 m, and the diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 14: Branch method (four branches), the diameter of the second main pipe 13A, the branch pipe diameter 13A, and the diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 15: Branch method (four branches), the diameter 13A of the second main pipe 24, and the diameter 13A of the branch pipe 15. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the flow rate of water increased as the inner diameter of the second main pipe 24 increased. Further, the flow rate of water was larger for the outer diameter seal than for the inner diameter seal regardless of the inner diameter of the second main pipe 24. Further, in the case of the branching method of Reference Examples 13 to 15, the flow rate of the second main pipe 24 was almost the same as that of the header method of Reference Examples 10 to 12 at 20A and 16A. At 13A, the flow rate of water decreased.
(Reference Examples 16-18)
In the branch method, only the shower facility 18 was fully opened as a watering facility, and the others were set as shown below, and the flow rate on the water supply side was measured. In the piping system, water was supplied from the water supply source 23 to each water supply facility, and the flow rate (L / min) of the water in the shower facility 18 was measured.

Reference Example 16: Branch method (7 branches), diameter 20A of the second main pipe 24, length 9.2 m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 17: Branch method (7 branches), diameter 13A of second main pipe 24, length 9.2 m, and diameter 13A of branch pipe 15. The result is shown in FIG.

Reference Example 18: Branch method (7 branches), diameter 16A of the second main pipe 24, length 9.2 m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
When the results of Reference Examples 16 to 18 were compared with the results of Reference Examples 13 to 15, the flow rate of water was almost the same, and there was almost no change between the case of 4 branches and the case of 7 branches in the branch method.

According to the results of the reference examples 1 to 18 described above, the flow rate on the water supply side when the watering equipment is individually used decreases slightly as the inner diameter of the pipe decreases, but the joint 14 of the outer diameter seal type is used. It was possible to grasp that the flow rate of water could be secured sufficiently. In addition, even when two watering facilities are used at the same time, the flow rate of water decreases as the inner diameter of the pipe decreases, but by using an outer diameter seal type joint 14, sufficient water flow is ensured. I found that I can do it.
[Flow rate on hot water supply side when shower equipment 18 is used individually]
(Reference Examples 19-21)
The water heater was activated, and only the shower facility 18 was fully opened as a watering facility in the header method, and the others were set as shown below to measure the flow rate on the hot water supply side. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 19: Header method, diameter 20A of first main pipe 12 and length 8m. The result is shown in FIG.
Reference Example 20: Header method, diameter 13A of first main pipe 12 and length 2 m. The result is shown in FIG.

Reference Example 21: Header method, diameter 16A of first main pipe 12 and length 5 m. The result is shown in FIG.
From these results, almost no change in the flow rate of the hot water due to the difference in the inner diameter of the second main pipe 24 was observed for each of the outer diameter seal and the inner diameter seal.
(Reference Examples 22-24)
The hot water heater 11 was operated, and only the shower facility 18 was fully opened as a watering facility by the branching method, and the others were set as shown below, and the flow rate on the hot water supply side was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 22: Branch method (four branches), the diameter 20A and the length 9.2 m of the first main pipe 12. The result is shown in FIG.
Reference example 23: Branch method (four branches), the diameter 13A of the first main pipe 12 and a length of 9.2 m. The result is shown in FIG.

Reference Example 24: Branch method (four branches), diameter 16A of first main pipe 12 and length 9.2 m. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the flow rate of hot water tended to increase slightly as the inner diameter of the pipe increased.
(Reference Examples 25-27)
The hot water heater 11 was operated, and only the shower facility 18 was fully opened as a watering facility by the branching method, and the others were set as shown below, and the flow rate on the hot water supply side was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 25: Branch method (7 branches), diameter 20A and length 9.2 m of the first main pipe 12. The result is shown in FIG.
Reference Example 26: Branch method (7 branches), first main pipe 12 caliber 13A) and length 9.2 m. The result is shown in FIG.

Reference Example 27: Branch method (7 branches), first main pipe 12 diameter 16A and length 9.2 m. The result is shown in FIG.
When the results of these reference examples 25 to 27 were compared with the results of reference examples 22 to 24, the results were almost equivalent, and almost no change was observed between the case of 4 branches and the case of 7 branches in the branching method.
[Flow rate on the hot water supply side when the shower facility 18 and the kitchen facility 22 are used simultaneously]
(Reference Examples 28-30)
The water heater 11 is activated, the shower facility 18 is fully opened as a watering facility in the header method, the water flow rate in the kitchen facility 22 is 6 (L / min), and the others are set as shown below. The flow rate on the hot water supply side was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 28: Header method, diameter 20A of first main pipe 12, length 2m, and diameter 13A of branch pipe 15. The result is shown in FIG.
Reference Example 29: Header method, diameter 13A of the first main pipe 12, length 2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 30: Header method, diameter 16A of the first main pipe 12, its length 2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
From these results, changes in the flow rate of hot water due to the outer diameter seal and inner diameter seal of the joint 14 and the inner diameter of the second main pipe 24 were hardly observed. In the case of simultaneous use of Reference Examples 28 to 30, the flow rate of hot water decreased to about 60% compared to the case of individual use of Reference Examples 19 to 21.
(Reference Examples 31-33)
The hot water heater 11 was operated, and only the shower facility 18 was fully opened as a watering facility by the branching method, and the others were set as shown below to measure the flow rate on the hot water supply side. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 31: Branch method (four branches), diameter 20A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 32: Branch method (four branches), diameter 13A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 33: Branch method (four branches), the diameter 13A of the first main pipe 12, and the diameter 13A of the branch pipe 15. The result is shown in FIG.
From these results, the flow rate of the hot water decreased when the diameter of the second main pipe 24 was 20A and 16A, but the flow rate of hot water decreased at 13A. Further, in the branching method of Reference Examples 31 to 33, compared with the header method of Reference Examples 28 to 30, the flow rate of hot water increased when the diameter of the second main pipe 24 was 20A and 16A, but the flow rate of hot water decreased at 13A. did.
(Reference Examples 34 to 36)
The hot water heater 11 was operated, and only the shower facility 18 was fully opened as a watering facility by the branching method, and the others were set as shown below, and the flow rate on the hot water supply side was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each water facility, and the flow rate (L / min) of hot water in the shower facility 18 was measured.

Reference Example 34: Branch method (7 branches), diameter 20A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 35: Branch method (7 branches), diameter 13A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 36: Branch method (7 branches), first main pipe 12 diameter 16A, length 9.2 m, and branch pipe 15 diameter 13A. The result is shown in FIG.
When the results of Reference Examples 34 to 36 are compared with the results of Reference Examples 31 to 33, the flow rate of hot water shows a close value, and in the branching method, results with little change between the case of 4 branches and the case of 7 branches. Met.

According to the results of the above Reference Examples 19 to 36, the flow rate on the hot water supply side when watering equipment is used individually decreases slightly as the inner diameter of the pipe decreases, but the joint 14 of the outer diameter seal type should be used. It was possible to grasp that the flow rate of hot water could be secured sufficiently. Furthermore, even when two watering facilities are used at the same time, the flow rate of hot water decreases when the inner diameter of the pipe is reduced. However, the use of an outer diameter seal type joint 14 ensures a sufficient flow rate of hot water. I found that I can do it.
[Wait waiting time when shower equipment 18 is used individually]
(Reference Examples 37 to 39)
The water heater 11 was operated, and only the shower facility 18 was fully opened and used as a watering facility in the header method, and the others were set as shown below, and the hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 37: Header method, diameter 20A of first main pipe 12 and length 8m. The result is shown in FIG.
Reference Example 38: Header method, diameter 13A of first main pipe 12 and length 2 m. The result is shown in FIG.

Reference Example 39: Header method, first main pipe 12 diameter 16A and length 5 m. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the hot water waiting time tends to be shorter as the inner diameter of the first main pipe 12 is smaller. In that case, the hot water waiting time of the outer diameter seal of the joint 14 was slightly shorter than that of the inner diameter seal.
(Reference Examples 40 to 42)
The water heater 11 was operated, and only the shower facility 18 was fully opened and used as a watering facility by the branch method, and the others were set as shown below, and the hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 40: Branch method (four branches), diameter 20A and length 9.2 m of the first main pipe 12. The result is shown in FIG.
Reference example 41: Branch method (four branches), diameter 13A of first main pipe 12 and length 9.2 m. The result is shown in FIG.

Reference example 42: Branch construction method (four branches), diameter 16A of first main pipe 12 and length 9.2 m. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the hot water waiting time tended to be shorter as the inner diameter of the pipe was smaller. Moreover, in the case of the branch method of Reference Examples 40 to 42, the hot water waiting time was shortened when the diameter of the first main pipe 12 was 20A and 16A, compared to the header method of Reference Examples 37 to 39.
(Reference Examples 43 to 45)
The water heater 11 was operated, and only the shower facility 18 was fully opened and used as a watering facility by the branch method, and the others were set as shown below, and the hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 43: Branch method (7 branches), diameter 20A of first main pipe 12 and length 9.2 m. The result is shown in FIG.
Reference example 44: Branch method (7 branches), diameter 13A of first main pipe 12 and length 9.2 m. The result is shown in FIG.

Reference example 45: Branch method (7 branches), diameter 16A of first main pipe 12 and length 9.2 m. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the hot water waiting time tends to be shorter as the inner diameter of the pipe is smaller, and the outer diameter seal tends to be shorter than the inner diameter seal. Further, when the results of Reference Examples 43 to 45 are compared with the results of Reference Examples 40 to 42, the results are approximate, and the branching method has little change between the case of 4 branches and the case of 7 branches.
[Hot water waiting time when shower equipment 18 and kitchen equipment 22 are used simultaneously]
(Reference Examples 46 to 48)
The water heater 11 is activated, the shower facility 18 is fully opened as a watering facility in the header method, the water flow rate in the kitchen facility 22 is 6 (L / min), and the others are set as shown below. The hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 46: Header method, diameter 20A of the first main pipe 12, length 8m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 47: Header method, diameter 13A of the first main pipe 12, its length 2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 48: Header method, diameter 16A of first main pipe 12, length 5m, and diameter 13A of branch pipe 15. The result is shown in FIG.
From these results, for each of the outer diameter seal and the inner diameter seal, the hot water waiting time tended to be shorter as the inner diameter of the pipe was smaller. In the case of simultaneous use of Reference Examples 46 to 48, compared with the case of individual use of Reference Examples 37 to 39, the hot water waiting time varies depending on the inner diameter of the first main pipe 12, but shows a close value. .
(Reference Examples 49-51)
The water heater 11 was operated, and only the shower facility 18 was fully opened and used as a watering facility by the branch method, and the others were set as shown below, and the hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 49: Branch method (four branches), diameter 20A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 50: Branch method (four branches), first main pipe 12 diameter 13A, length 9.2 m, and branch pipe 15 diameter 13A. The result is shown in FIG.

Reference Example 51: Branch method (four branches), first main pipe 12 diameter 16A, length 9.2 m, and branch pipe 15 diameter 13A. The result is shown in FIG.
From these results, for each of the outer diameter seal and inner diameter seal, the hot water waiting time tends to be shorter as the inner diameter of the pipe is smaller, and the outer seal is shorter than the inner diameter seal. there were. Further, in the case of the branch method of Reference Examples 49 to 51, the hot water waiting time was obviously shortened compared to the case of the header method of Reference Examples 46 to 48.
(Reference Examples 52 to 54)
The water heater 11 was operated, and only the shower facility 18 was fully opened and used as a watering facility by the branch method, and the others were set as shown below, and the hot water waiting time in the shower facility 18 was measured. Then, in the piping system, hot water was supplied from the water heater 11 to each facility around the water, and the hot water waiting time (seconds) in the shower facility 18 was measured.

Reference Example 52: Branch method (7 branches), diameter 20A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
Reference Example 53: Branch method (7 branches), diameter 13A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.

Reference Example 54: Branch method (7 branches), diameter 16A of the first main pipe 12, length 9.2m, and diameter 13A of the branch pipe 15. The result is shown in FIG.
When the results of Reference Examples 52 to 54 were compared with the results of Reference Examples 49 to 51, the results were approximate, and the results of the branching method were small in the case of 4 branches and 7 branches.

  According to the results of the reference examples 37 to 54, the hot water waiting time when the watering equipment is used individually is shortened when the inner diameter of the pipe is reduced, and also when two watering equipment are used at the same time. The hot water waiting time is shortened when the inner diameter of the pipe is reduced. Accordingly, by setting the inner diameter of the first main pipe 12 on the hot water supply side to be smaller than the second main pipe 24 on the water supply side, the hot water waiting time on the hot water supply side is maintained while maintaining the flow rate of water on the water supply side. It became clear that can be shortened.

Next, examples of the present invention and comparative examples other than the present invention will be described.
[When the hot water supply side and the water supply side are both header construction methods]
Example 1
A piping system was constructed under the following conditions so that the inner diameter of the first main pipe 12 on the hot water supply side was smaller than the inner diameter of the second main pipe 24 on the water supply side. In the piping system, the water heater 11 was operated to supply hot water to each watering facility, and water was supplied from the water supply source 23 to each watering facility. In that case, hot water waiting time (second) in the shower facility 18 and hot water and water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 24 (a) and (b). In all examples and comparative examples, the water pressure was set to 0.2 MPa.

Hot water supply side: Header method, diameter 13A of first main pipe 12 and length 2 m.
Water supply side: Header method, diameter 20A and length 8m of the second main pipe 24.
(Example 2)
In Example 1, it implemented similarly to Example 1 except having used the shower installation 18 and the kitchen installation 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 27 (a) and (b).
(Example 3)
In Example 1, it implemented like Example 1 except having set it as the diameter 16A and length 5m as the 2nd main piping 24 by the side of water supply. Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 25 (a) and (b).
Example 4
In Example 3, it implemented similarly to Example 3 except having used the shower installation 18 and the kitchen installation 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 28 (a) and (b).
(Comparative Example 1)
In Example 1, it implemented similarly to Example 1 except having set it as the diameter 20A and length 8m as the 1st main piping 12 by the side of hot water supply. Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 26 (a) and (b).
(Comparative Example 2)
In the comparative example 1, it implemented similarly to the comparative example 1 except having used the shower equipment 18 and the kitchen equipment 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 29 (a) and (b).
[When the hot water supply side and the water supply side are both branched]
(Example 5)
A piping system was constructed under the following conditions so that the inner diameter of the first main pipe 12 on the hot water supply side was smaller than the inner diameter of the second main pipe 24 on the water supply side. In the piping system, the water heater 11 was operated to supply hot water to each watering facility, and water was supplied from the water supply source 23 to each watering facility. In that case, hot water waiting time (second) in the shower facility 18 and hot water and water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 30 (a) and (b).

Hot water supply side: Branch method, diameter 13A and length 9.2m of first main pipe 12, water pressure 0.2 MPa.
Water supply side: Branch method, diameter 20A and length 9.2m of second main pipe 24, water pressure 0.2 MPa.
(Example 6)
In Example 5, it implemented similarly to Example 5 except having used the shower installation 18 and the kitchen installation 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 33 (a) and (b).
(Example 7)
In Example 5, it implemented similarly to Example 5 except having set it as the diameter 16A as the 2nd main piping 24 by the side of water supply. Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 31 (a) and (b).
(Example 8)
In Example 7, it implemented similarly to Example 7 except having used the shower installation 18 and the kitchen installation 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 34 (a) and (b).
(Comparative Example 3)
In Example 5, the same thing as Example 1 was carried out except that the first main pipe 12 on the hot water supply side had a diameter of 20A and was set to have the same inner diameter as the second main pipe 24 on the water supply side. Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 32 (a) and (b).
(Comparative Example 4)
In the comparative example 3, it implemented similarly to the comparative example 3 except having used the shower installation 18 and the kitchen installation 22 simultaneously. In that case, the shower facility 18 was fully opened, and the flow rate in the kitchen facility 22 was set to 6 (L / min). Then, the hot water waiting time (second) in the shower facility 18 and the hot water and the water flow rate (L / min) in the shower facility 18 were measured. The results are shown in Table 1 and FIGS. 35 (a) and (b).

表１に示したように、ヘッダー工法を採った実施例１を比較例１と比較すると、実施例１における給湯側の第１メイン配管１２の内径を比較例１における給湯側の第１メイン配管１２の内径より小さくなるように設定したことから、外径シール及び内径シール共に、湯待ち時間を１７秒前後短縮することができた。この場合、給湯側の湯水及び給水側の水の流量は、比較例１の場合とほぼ同等であった。

As shown in Table 1, when Example 1 employing the header method is compared with Comparative Example 1, the inner diameter of the first main pipe 12 on the hot water supply side in Example 1 is the first main pipe on the hot water supply side in Comparative Example 1. Since it was set to be smaller than the inner diameter of 12, both the outer diameter seal and the inner diameter seal could shorten the hot water waiting time by about 17 seconds. In this case, the flow rates of the hot water on the hot water supply side and the water on the water supply side were almost the same as in Comparative Example 1.

  Also, for the simultaneous use of the shower facility 18 and the kitchen facility 22, when comparing Example 2 with Comparative Example 2, the inner diameter of the first main pipe 12 on the hot water supply side in Example 2 is the same as that on the hot water supply side in Comparative Example 2. Since it was set to be smaller than the inner diameter of one main pipe 12, both the outer diameter seal and the inner diameter seal could shorten the hot water waiting time by about 14 seconds.

  Furthermore, when Example 3 was compared with Comparative Example 1, the inner diameter of the first main pipe 12 on the hot water supply side in Example 3 was set to be smaller than the inner diameter of the first main pipe 12 on the hot water supply side in Comparative Example 1. Thus, the hot water waiting time was shortened by about 17 seconds for both the outer diameter seal and the inner diameter seal as in Example 1. In the third embodiment, the inner diameter of the second main pipe 24 on the water supply side is set smaller than that in the first embodiment. However, the flow rates of hot water on the hot water supply side and water on the water supply side are almost the same as those in the first embodiment. Met.

  In addition, for the simultaneous use of the shower facility 18 and the kitchen facility 22, when Example 4 is compared with Comparative Example 2, the inner diameter of the first main pipe 12 on the hot water supply side in Example 4 is the same as that on the hot water supply side in Comparative Example 2. Since it was set to be smaller than the inner diameter of the first main pipe 12, the hot water waiting time could be shortened by about 14 seconds for both the outer diameter seal and the inner diameter seal as in Example 2.

  Moreover, when Example 5 which adopted the branch method is compared with Comparative Example 3, the inner diameter of the first main pipe 12 on the hot water supply side in Example 5 is smaller than the inner diameter of the first main pipe 12 on the hot water supply side in Comparative Example 3. Therefore, the hot water waiting time was shortened by about 10 seconds for both the outer diameter seal and the inner diameter seal. In this case, the flow rate of hot water on the hot water supply side was slightly lower than that in Comparative Example 3, but the flow rate of water on the water supply side was equivalent to that in Comparative Example 3.

  Also, regarding the simultaneous use of the shower facility 18 and the kitchen facility 22, when Example 6 is compared with Comparative Example 4, the inner diameter of the first main pipe 12 on the hot water supply side in Example 6 is the same as that on the hot water supply side in Comparative Example 4. Since it was set to be smaller than the inner diameter of one main pipe 12, the hot water waiting time could be reduced by 8 seconds for the outer diameter seal and 3.7 seconds for the inner diameter seal.

  Furthermore, when Example 7 was compared with Comparative Example 3, the inner diameter of the first main pipe 12 on the hot water supply side in Example 7 was set to be smaller than the inner diameter of the first main pipe 12 on the hot water supply side in Comparative Example 3. Thus, the hot water waiting time was shortened by about 10 seconds for both the outer diameter seal and the inner diameter seal as in Example 5. In the seventh embodiment, the inner diameter of the second main pipe 24 on the water supply side is set smaller than that in the fifth embodiment, but the flow rates of the hot water on the hot water supply side and the water on the water supply side are almost the same as those in the fifth embodiment. Met.

  In addition, for simultaneous use of the shower facility 18 and the kitchen facility 22, when Example 8 is compared with Comparative Example 4, the inner diameter of the first main pipe 12 on the hot water supply side in Example 8 is the same as that on the hot water supply side in Comparative Example 4. The inner diameter of the first main pipe 12 was set to be smaller. Therefore, the hot water waiting time could be shortened by 8 seconds for the outer diameter seal and 3.7 seconds for the inner diameter seal.

In addition, the said embodiment can also be changed and comprised as follows.
The number of branches of the branch pipe 15 from the first header 13 or the second header 25 in the header method or the number of branches of the branch pipe 15 from the joint 14 in the branch method is, for example, 4 branches, 10 according to the number of watering facilities It can also be changed to a branch.

  ・ It is possible to combine the header method and the branch method on the hot water supply side and the water supply side. That is, the hot water supply side can be the header method, the water supply side can be the branch method, the hot water supply side can be the branch method, and the water supply side can be the header method.

The inner diameter of the branch pipe 15 on the hot water supply side can be set to be smaller than the inner diameter of the branch pipe 15 on the water supply side.
-Equipment other than the wash equipment 16, shower equipment 18, etc. can be used as the water equipment, and a plurality of water equipment can be used.

-The water pressure (original pressure) in a piping system can be changed, for example in the range of 0.1-0.4 MPa.
Furthermore, the technical idea grasped from the embodiment will be described below.

  The piping system according to any one of claims 1 to 4, wherein the inner diameter of the first main pipe is 10 to 14 mm, and the inner diameter of the second main pipe is 15 to 22 mm. When comprised in this way, the effect of the invention concerning any one of Claims 1-4 can be exhibited effectively.

  The inner diameter of the first main pipe is 10 to 14 mm, a plurality of branch pipes are branched and connected to the first main pipe via joints, and a plurality of branch pipes are branched and connected to the second main pipe via a header. The piping system according to claim 1, wherein: When comprised in this way, the effect of the invention which concerns on Claim 1 can be exhibited most effectively.

Explanatory drawing which shows the piping system of embodiment which employ | adopted the header construction method on the hot water supply side and the water supply side. Explanatory drawing which shows the piping system of embodiment which employ | adopted the branch construction method on both the hot water supply side and the water supply side. Sectional drawing which shows the state which inserts piping in the coupling of an outer diameter seal. The half sectional view showing the state where piping is inserted in the joint of the inner diameter seal. The partially broken front view which shows the state which connects a joint to a header. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in the reference examples 1-3. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in Reference Examples 4-6. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in Reference Examples 7-9. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in Reference Examples 10-12. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in Reference Examples 13-15. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in Reference Examples 16-18. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in Reference Examples 19-21. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in Reference Examples 22-24. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in the reference examples 25-27. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a joint in Reference Examples 28-30. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in the reference examples 31-33. (A) And (b) is a graph which shows the flow volume of the water at the time of changing the kind of piping and a coupling in the reference examples 34-36. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a coupling in the reference examples 37-39. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a coupling in the reference examples 40-42. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a joint in the reference examples 43-45. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a joint in the reference examples 46-48. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a joint in the reference examples 49-51. (A) And (b) is a graph which shows the hot water waiting time at the time of changing the kind of piping and a joint in the reference examples 52-54. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 1, (b) is the flow rate and hot water supply of the hot-water side at the time of changing the seal | sticker form of a joint in Example 1. The graph which shows the flow volume of the water of the side. (A) is a graph showing the relationship between the seal form of the joint and the hot water waiting time in Example 3, and (b) is the flow rate and water supply of hot water on the hot water supply side when the seal form of the joint is changed in Example 3. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal form of a joint, and a hot water waiting time in the comparative example 1, (b) is the flow rate of hot water on the hot water supply side and water supply when the seal form of a joint is changed in the comparative example 1 The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 2, (b) is the flow rate and hot water supply of the hot water at the time of changing the seal | sticker form of a joint in Example 2. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 4, (b) is the flow rate of hot water on the hot-water supply side, and water supply at the time of changing the seal | sticker form of a joint in Example 4. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and a hot water waiting time in the comparative example 2, (b) is the flow rate and hot water supply of the hot water at the time of changing the seal | sticker form of a joint in the comparative example 2. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 5, (b) is the flow rate and water supply of the hot water at the time of changing the seal | sticker form of a joint in Example 5. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal form of a joint and hot water waiting time in Example 7, (b) is the flow rate and water supply of the hot water at the time of changing the seal form of a joint in Example 7, and water supply The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal form of a joint and hot water waiting time in the comparative example 3, (b) is the flow rate of hot water on the hot water supply side and water supply when the seal form of a joint is changed in the comparative example 3 The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 6, (b) is the flow rate and hot water supply of the hot water at the time of changing the seal | sticker form of a joint in Example 6. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal | sticker form of a joint, and hot water waiting time in Example 8, (b) is the flow rate and hot water supply of the hot-water side at the time of changing the seal | sticker form of a joint in Example 8. The graph which shows the flow volume of the water of the side. (A) is the graph which shows the relationship between the seal form of a joint, and hot water waiting time in the comparative example 4, (b) is the flow rate of hot water on the hot water supply side and water supply when the seal form of a joint is changed in the comparative example 4 The graph which shows the flow volume of the water of the side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Hot water heater, 12 ... 1st main piping, 13 ... 1st header, 14 ... Joint, 15 ... Branch piping, 16 ... Washing equipment as watering equipment, 17 ... Toilet equipment as watering equipment, 18 ... Water Shower facilities as surrounding facilities, 19 ... Bath facilities as water facilities, 20 ... Laundry facilities as water facilities, 21 ... Heating facilities as water facilities, 22 ... Kitchen facilities as water facilities, 23 ... Supply Water source, 24 ... second main piping, 25 ... second header.

Claims (4)

Connect the first main pipe to the water heater, branch connection to the first main pipe via a header or a joint, and connect watering equipment to each branch pipe. In addition to supplying hot water, connect the second main pipe to the water supply source, connect multiple branch pipes to the second main pipe via headers or joints, and connect water facilities to each branch pipe And a piping system configured to supply water to a watering facility,
A piping system, wherein an inner diameter of the first main pipe is set to be smaller than an inner diameter of the second main pipe. The branch pipe on the hot water supply side is connected to the first main pipe via a header, and the branch pipe on the water supply side is connected to the second main pipe via a header. The piping system described in. The branch pipe on the hot water supply side is connected to the first main pipe via a joint, and the branch pipe on the water supply side is connected to the second main pipe via a joint. The piping system described in. The piping system according to any one of claims 1 to 3, wherein a seal of the branch pipe in the joint has a structure that seals on an outer peripheral surface of the branch pipe.

Images