JP2000054442A - Water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly feed hot water and to automatically regulate pressure so as to always regulate water pressure of first and second flow paths and to feed sufficient hot water also to a second floor. SOLUTION: A pressure regulating means 4 that can regulate water head difference between first and second flow paths on the lower reaches of a branch part is provided at an intermedite part of the first flow path and on the lower reaches of the branch part from the second flow path. The pressure regulating means 4 is provided with a valve seat 45 provided at an intermediate part of the first flow path; a valve element 46 separably abutting the valve seat 45 from the lower reaches side; a spring 48 energizing the valve element 46 to the upper reaches; and a valve guide body for supporting the spring 48 slidably from behind and expanding/contracting the spring 48 by thread movement. The water head difference between the first and second flow paths is regulated by the expansion/contraction of the spring 48.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device.

[0002]

2. Description of the Related Art Conventionally, as one form of a hot water supply device, a water source is connected to a water inlet side of a water heater, and hot water supply destinations disposed in various parts of the room are connected to a hot water supply side. There was a water heater that was designed to feed water.

[0003]

In recent years, however, there has been a hot water supply system on the second floor in which hot water supply destinations such as baths, showers, and lavatories are installed. In such a hot water supply system, as shown in FIG. Since the pressure loss differs depending on the height difference h between the first-floor hot-water supply destination and the second-floor hot-water supply destination, as shown in FIG. 5, if the water pressure at the second-floor hot-water supply destination is not high enough to match the height difference h, the hot water cannot be discharged. Also, at the same pressure, the amount of hot water from the second-floor hot water supply destination is small, and furthermore, when hot water is simultaneously supplied from the first-floor hot water supply destination and the second-floor hot water supply destination, the outflow of hot water from the second-floor hot water supply destination becomes extremely poor. Hot water may not be supplied from the hot water supply on the second floor.

[0004]

Therefore, according to the present invention, there is provided a first water discharge path communicating with a first water supply destination, and a first water supply path branched from the first water supply path and located at a higher position than the first water supply destination. Second
And a second water supply path communicating with the water supply destination of the first and second water supply destinations. Downstream from the branch with the water discharge path, pressure regulating means capable of adjusting the head difference between the first and second water discharge paths downstream from the branch is provided, and the pressure regulating means comprises a first water discharge path. A valve seat provided in the middle, a valve body that comes into contact with the valve seat from the downstream side, and a spring that urges the valve body to the upstream side, and slidably supports the spring from the rear. And a valve guide body for expanding and contracting the spring by screwing, so that the head difference between the first and second water discharge paths is adjusted by the expansion and contraction of the spring.

Another feature is that the valve is opened when the pressure on the upstream side of the valve body exceeds the urging force of the spring.

[0006]

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

FIG. 1 shows a hot water supply system as a hot water supply apparatus according to the present invention.
And the first-floor hot-water supply pipe 1 connected to the same hot-water supply machine 3, respectively;
A first-floor hot-water pipe 2 connected to the second-floor hot-water pipe 2 and the first-floor hot-water pipe 1
A first floor hot water supply 10 composed of a faucet 11 as a water supply destination, a shower 12 and the like, and a second floor composed of a faucet 21 as a second water supply destination connected to the second floor hot water supply pipe 2, a shower 22, etc. A side hot water supply destination 20 is provided.

The water heater 3 includes a heating pipe 33 communicating with a water inlet 32 provided on a wall surface of a casing 31, a heat source 34 for heating water flowing through the heating pipe 33, and a communication end connected to the end of the heating pipe 33. And a pressure regulating valve 4 as pressure regulating means. In addition, the starting end of the first-floor hot water supply pipe 1 is connected to a first-floor hot-water supply gate 38 provided on the downstream side of the pressure regulating valve 4 in the discharge section 35, and a path from the discharge section 35 to the first-floor hot-water supply pipe 1 is provided. Is a first water discharge path, and a second water supply path is formed by connecting the starting end of the second floor hot water supply pipe 2 to a second floor hot water supply gate 37 branched from the upstream side of the pressure regulating valve 4. .

Then, the water inlet 32 of the water heater 3 is connected to a water source S such as a water supply, and water is fed into the heating pipe 33 by the water pressure of the water source S, and the hot water heated by the heat source 34 is To each hot water supply destination 10,20.

Further, the temperature of the hot water from the heating pipe 33 is detected by the temperature sensor 36, and the calorific value of the heat source 34 is feedback-controlled by using a set temperature set in a control device (not shown) as a target value. The tapping temperature is kept constant.

[0011] As shown in FIG.
An inflow port 41 is provided at the left end opening of the U-shaped tubular valve body 40 to communicate with the end of the heating pipe 33, and a valve guide body 42 is screwed into the right end opening to close it, and the flow is fed to the lower end opening. exit
43 is provided to connect the starting end of the first-floor hot water supply pipe 1 to form a flow path 44 of hot water bent into a substantially L-shape.

A valve seat 45 having a substantially conical contact surface 45 'which is expanded in the downstream direction is formed at a position on the inner surface of the valve body 40 facing the valve guide body 42. The valve body 46 is brought into contact with and detachable from the downstream side. Numeral 47 denotes a valve stem for guiding the operation of the valve body 46 to and from the valve seat 45 by slidably passing through the valve guide body 42. 48 is a spring and a valve element 46
Is biased toward the valve seat 45 so that the pressure on the upstream side of the valve body is kept higher than the pressure on the downstream side.

The difference between the pressure on the upstream side of the valve body and the pressure on the downstream side can be adjusted by the depth of screwing of the valve guide body 42 into the valve body 40.

Reference numeral 49 denotes a lock nut, reference numeral 50 denotes a cap nut, reference numeral 51 denotes packing, and reference numeral 52 denotes a pressure release hole which also serves as a tool.

FIG. 3 shows the flow characteristics of the pressure regulating valves 4 and 6. The hot water does not flow unless the pressure of the water source S is higher than the set pressure H set by the springs 48 and 68. Therefore, if the pressure of the water source S is equal to or higher than the set pressure H, the pressure on the upstream side of the valve body is maintained higher than the pressure on the downstream side by the set pressure H.

FIG. 4 shows a first floor hot water supply destination 10 and a second floor hot water supply destination 20.
Since the pressure on the upstream side of the valve body connected to the hot water supply pipe 2 for the second floor is higher by the set pressure H than the downstream side of the valve body connected to the hot water supply pipe 1 for the first floor, the height difference h The pressure loss at the second floor side hot water supply destination 20 can be compensated, and both can have almost the same tapping characteristics.

[0017]

As described above, according to the present invention, the first water discharge path communicating with the first water supply destination, and the first water supply path is branched from the first water supply path and located at a higher position than the first water supply destination. A second water discharge path communicating with a second water supply destination, wherein the first and second water supply paths are provided.
In the water supply device capable of discharging water from each of the water supply destinations, in the middle of the first water discharge path, and at the downstream side of the branch point with the second water discharge path, the first and the water downstream of the branch part. Pressure regulating means capable of adjusting the head difference of the second water discharge path is provided, and the pressure regulating means abuts on a valve seat provided in the middle of the first water discharge path so as to be able to freely contact and separate from the downstream from the valve seat. A valve body, a spring that urges the valve body to the upstream side, and a valve guide body that supports the spring slidably from the rear and expands and contracts the spring by screwing. (2) Since the head difference of the water outflow path is adjusted by the expansion and contraction of the spring, the outflow of water from the second water supply destination becomes poor, or
When water is simultaneously discharged from the second water supply destination, water does not stop flowing out of the second water supply destination.

[0018] In addition, since the valve is configured to open when the pressure on the upstream side of the valve body exceeds the biasing force of the spring, the pressure can be automatically adjusted, and the water pressure in the first and second water discharge paths is always maintained. And hot water can be supplied to the second floor.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a hot water supply system provided with a hot water supply apparatus with a second floor hot water supply according to the present invention.

FIG. 2 is an explanatory vertical sectional view of a pressure regulating valve.

FIG. 3 is a graph showing flow characteristics of a pressure regulating valve.

FIG. 4 is a graph showing hot water supply characteristics at the first-floor and second-floor hot water supply destinations.

FIG. 5 is a graph showing the tapping characteristics of the first-floor and second-floor hot-water supply destinations in the conventional hot-water heater.

[Explanation of symbols]

 3 Hot water supply unit 4 Pressure regulating valve 35 Discharge part 37 Second floor hot water supply gate 38 First floor hot water supply gate 44 Flow path 45 Valve seat 46 Valve body 48 Spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hisashi Nakamura 431-1 Uozakihama-cho, Higashi-Nada-ku, Kobe-shi, Hyogo Japan Inside the Nippon Yupro Co., Ltd. No. Japan Yupro Co., Ltd.

Claims (2)

[Claims] A first water supply path communicating with a first water supply destination; and a first water supply path branching from the first water supply path and communicating with a second water supply destination located at a higher place than the first water supply destination. A water supply device, comprising: a first water supply path and a second water supply path, wherein water can be supplied from each of the first and second water supply destinations. Also on the downstream side, the first on the downstream side from the branch portion.
And a pressure control means capable of adjusting a head difference of the second water discharge path, wherein the pressure control means comprises a valve seat provided in the middle of the first water discharge path;
A valve body that comes into contact with the valve seat from the downstream side so as to be able to come and go, a spring that urges the valve body to the upstream side, and the spring that is slidably supported from the rear and expands and contracts by screwing And a valve guide body to be
The water supply device is characterized in that the head difference of the second water discharge path is adjusted by expansion and contraction of the spring. 2. A first water discharge path communicating with a first water supply destination and a second water supply path branched from the first water supply path and connected to a second water supply destination located at a higher position than the first water supply destination. A water supply device, comprising: a first water supply path and a second water supply path, wherein water can be supplied from each of the first and second water supply destinations. Also on the downstream side, the first on the downstream side from the branch portion.
And a pressure control means capable of adjusting a head difference of the second water discharge path, wherein the pressure control means comprises a valve seat provided in the middle of the first water discharge path;
A valve body that comes into contact with the valve seat from the downstream side so as to be able to come and go from the downstream side, a spring that urges the valve body toward the upstream side, and supports the spring slidably from the rear and expands and contracts the spring by screwing A water supply device, comprising: a valve guide body to be closed, and configured to open when the pressure on the upstream side of the valve body exceeds the urging force of the spring.