JPS58217143A - Tap-controlled hot-water supplying device heated by town gas - Google Patents

Abstract

PURPOSE:To promote the rise-up of hot-water temperature by a method wherein a valve, limiting the amount of feed water upon beginning the operation of the tap-controlled hot-water heater for few seconds, is provided in a feed water pipeline or a hot-water supplying pipeline. CONSTITUTION:A piping 4 for the gas supplied to a burner 3 is provided with a main solenoid valve 5, a governor 6 and a gas proportional valve 7 while the feed water pipe 10, connected to a heat exchanger 8, is provided with a valve 11, a feed water temperature sensor 12 and a water volume sensor 13. All the equipments, except the governor 6, are connected to a control box 14 to control the gas proportional valve 7 by a set temperature, a feed water temperature and the amount of supplying water. When the operation is initiated by opening a water cock 9, the water volume sensor 13 detects the stream of the water and sends a signal D to the valve 11 to close the valve 11 for few seconds.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas instantaneous hot water supply system, and more particularly to a gas instantaneous hot water supply system that uses a system (hereinafter referred to as a gas proportional system) to control the temperature of hot water supplied by the amount of gas.

Conventionally, instantaneous water heaters using the gas proportional system detect the temperature at the outlet of the water heater, compare this value with the set temperature value, and send a signal to the gas proportional valve. A so-called feedback system that increases or decreases the amount of gas sent to the burner, or a proportional valve that detects the temperature and flow rate at the inlet of the water heater and calculates the amount of gas sent to the burner based on the value calculated by the set temperature and set efficiency. These are feed-forward type water heaters that increase or decrease the amount of water.When the faucet is opened and the water flow switch or water flow sensor detects the flow of water, the water heater starts to supply hot water. .

However, in these conventional gas proportional type instantaneous hot water heaters, near the maximum capacity, the time in the trench to bring the water to the set temperature and the startup time υ are determined by the time constant of the heat exchanger. Ta.

By the way, in general, when a water heater is in use, the end faucet of the water heater is often left fully open at first in order to quickly release the water stored in the piping.

Therefore, when the gas proportional valve has to supply the maximum amount of gas to the gas burner in order to supply the set temperature when the faucet is fully opened, the set temperature T1 as shown by the chain line in FIG. The disadvantage is that it takes a long time, TL, to raise the temperature of the water to a certain point, and the amount of gas corresponding to that time is wasted.

The object of the present invention is to eliminate the above-mentioned drawbacks, to accelerate the rise of the water temperature at the set temperature O, and to reduce the amount of gas consumed.

The basic structure of the present invention is to provide pulp in the water supply piping to limit the amount of water supplied for a few seconds when the water faucet at the end of the cough pipe is opened and the instantaneous water heater starts operating. The amount of gas is used to raise the temperature of water at a small flow rate.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

This embodiment is a feedforward type gas instantaneous water heater, and the gas supply pipe (4) connects with the gas pipe (ri) to supply fuel gas to the burner (3) in the main body casing (2). A forward-dimensional solenoid valve (5), a governor (6), and a gas proportional valve (7) are provided from the L upstream side.

On the other hand, water is connected to the water supply source at the water pipe cape to supply water to the heat exchanger (8) of the water heater (3), and the heated hot water from the heat exchanger (8) is transferred to the water faucet (9) at the terminal. The water supply pipe αQ that supplies water is provided with a water temperature sensor (b) and a water flow sensor (6) sequentially from the upstream side to the inlet side (10 &).

Then, the main solenoid valve (5) of the gas supply pipe (4), the gas proportional valve (7), the pulp Q of the water supply pipe Q*), the supply water temperature sensor Oa1 water flow sensor (to), and the control box (11 electrically connected.

The control box a◆ is controlled by the set temperature set with the temperature setting dial (c) provided on the red side of the box, the water supply temperature A detected by the water supply temperature sensor (b), and the water volume B detected by the water volume sensor C1→. It is configured to calculate the required gas amount and send a signal C to the gas proportional valve (7).

The gas proportional valve (7) described above increases or decreases the amount of gas sent to the burner (3) in accordance with this signal C.

The control box 114 is equipped with a water sensor (6
) detects that water is flowing, pulp (1
Pulp OJ receives the signal and closes the valve (11) for several seconds.

FIG. 2 shows an example of the above-mentioned pulp o force.

The pulp C1,) has a water inlet cL, a water outlet α force, and a valve α in the middle of the water channel α which communicates these two ports αQα force.

A valve seat (
The valve body tC is held by a spindle) and a corresponding valve body H.

The spindle ■ is moved forward and backward to the outside via the seal member (2), and is always urged by the spring (c) to close the valve body QD.
Hold the valve in the valve opening direction, and then press the control box α→
The valve body Q) moves forward by being driven pneumatically or mechanically in response to a signal from the valve body Q), and brings the valve body Q) into close contact with the valve seat for several seconds.

On the other hand, in addition to the valve seat, the partition wall (6) is provided with a small hole connecting the primary side and the secondary side of the water channel α.

Therefore, by closing the valve u6, the amount of water supplied to this pulp (Lll) can be limited to the amount that passes through the small hole (c).

Therefore, in such a water heater, when the faucet (9) is opened and the water flow sensor 0 detects the flow of water, the pulp CIp closes the valve u6 for a few seconds and only allows the inflow to pass through the small hole (c). Since the water heater (3) is limited to the amount of water for several seconds after it starts operating,
By heating water at a small flow rate with the gas amount at maximum capacity, the water temperature can be raised to the set temperature T1 in a short period of time t1', as shown by the solid line in FIG.

In the above embodiments, a feedforward type gas instantaneous hot water supply apparatus has been described, but the present invention can be implemented in exactly the same way with a feedback type gas instantaneous hot water supply apparatus.

Since the present invention has the above configuration, it has the following advantages.

(Li) Since the time required to raise the hot water temperature to the set temperature is short, the amount of wasted gas is reduced, and gas can be saved.

(2) It is easy to use because hot water at the set temperature can be obtained quickly.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a gas instantaneous water heater showing an embodiment of the present invention, Fig. 2 is a sectional view showing an embodiment of pulp, which is one of the constituent elements of the present invention, and Fig. In the temperature rise characteristic diagram, the rise characteristic of the water heater of the present invention is shown by a solid line, and the rise characteristic of the conventional water heater is shown by a chain line. 3...Water boiler 9...Water faucet 10...Water supply pipe 11...Pulp. Patent applicant: Toto Kiki Co., Ltd. Procedural amendment August 7, 1981? Day 1, Indication of the case 1982 Patent Application No. 100193 2, Name of the invention Instant gas supply S device 3, Person making the amendment Relationship to the case Patent applicant Name (Name) (AO8) Toto Kiki Co., Ltd. 4, Agent Address: 5-14-7 Hakusan, Bunkyo-ku, Tokyo, Date of Amendment Order (Voluntary Amendment): Showa Month, Day, 6, Subject of Amendment (1) Drawing 7, Contents of Amendment (1) Figure 1 of the drawings has been corrected as shown in the attached sheet.

Claims (1)

[Claims] When the water faucet at the end of the pipe floor is opened in the water supply pipe or hot water supply pipe of an instantaneous water heater that controls the water supply temperature by the amount of gas, and the instantaneous water heater starts to operate, the amount of water supplied is controlled. A gas instantaneous water heater characterized by being equipped with a valve that limits the time for several seconds.