JPS60202255A - Hot water supplying bath equipment - Google Patents

Abstract

PURPOSE:To enable to fill a bathtub with hot water in a short time by a method wherein the hot water with adequate temperature produced at an instantaneous water heater is sent in the bathtub through both the feed pipe and return pipe of the circulating heating circuit of a bath. CONSTITUTION:A bypass pipe 22 with an ON-OFF valve A21 therein is provided between a return pipe 15, which connects a circulating pump 14 with a bathtub 12, and a feed pipe 11 on the upstream side of a check valve A20. At the same time, the tip of a hot water filling pipe is connected to the feed pipe 11 at a position lying between the check valve A20 and the bypass pipe 22. In addition, a water flow sensor 23 is provided between an ON-OFF valve B16 and a vacuum breaking valve 17. Both the return pipe 15 and the feed pipe 11 constitute a circulating circuit and the diameters of the pipes 15 and 11 are smaller than that of a hot water supplying pipe 6a. Further, a compound type hot water supplier locates above the bathtub 12. The flow rate is contrived to increase by constituting to set hot water through both the feed pipe and the return pipe of a circulating heating circuit by means of the bypass pipe and the ON-OFF valve A.

Description

[Detailed Description of the Invention] Industrial Application Field A water heater that combines an instantaneous water heater and a forced circulation bath pot, in which a large amount of hot water obtained from the instantaneous water heater is poured into the bathtub through the circulation circuit of the bath pot. This enables automatic operation from the start of boiling and pouring to the stop of pouring.

Conventional structure and its problems Conventionally, this type of combined water heater has a structure that performs a hot water supply function and a bath reheating function, and a typical example is shown in FIG. The instantaneous water heater 1 includes an instantaneous water heater burner 2 and an instantaneous water heater heat exchanger 3.
The tip of the outlet side 4 of the instantaneous water heater heat exchanger 3 is connected to hot water taps 6a and 6b through hot water supply pipes ea and eb. Next, the bathtub 7 consists of a bathtub burner 8 and a bathtub heat exchanger 9, and the outlet side 10 of the bathtub heat exchanger 9 is connected to the bathtub 12 via an outgoing pipe 11, and the inlet side A forced circulation pump 14 is installed in the bathtub 1 through a return pipe 16.
I am in contact with 2. A combined water heater with this configuration can perform the functions of an instantaneous water heater and a bath pot at the same time, and because it uses forced circulation heating to reheat the bath, the appliance can be installed in a location away from the bathtub (installation-free type). ), but it has the following drawbacks.

When pouring an appropriate amount of hot water obtained from an instantaneous water heater into the bathtub, the hot water is poured into the bathtub from the hot water tap 6b near the bathtub with the lid of the bathtub open, resulting in a large loss of heat radiation and making it difficult to save energy. It was bad. Furthermore, when the lid of the bathtub is closed, a large amount of hot water at an appropriate temperature obtained from the instantaneous water heater is automatically poured into the bathtub, and when an appropriate amount of hot water is poured into the bathtub, the hot water is automatically instantaneous. There is a drawback that the boiler cannot be stopped.

Purpose of the Invention The purpose of the present invention is to provide a system that allows suitable temperature hot water obtained from an instantaneous water heater to be poured into the bathtub with the lid closed, and that the hot water is poured into the bathtub through a forced circulation heating system for reheating the bath. It is possible to pour a large amount of molten metal, and the pouring can start completely automatically.
It is to stop automatically.

Constituent structure of the invention This is a water heater that combines an instantaneous water heater and a forced circulation heating bath pot, in which a return pipe, a circulation pump, a heat exchanger for the bath pot, and a check valve A are arranged in this order from approximately the bottom of the bathtub. The forced circulation heating bath pot is equipped with a bypass pipe that communicates with the substantially lower part of the bathtub through an outgoing pipe, and has an on-off valve A for the return pipe and outgoing pipe between the circulation pump and the bathtub, and the outlet side of the instantaneous water heater. One side is connected to the hot water tap, and the other side is provided with an on-off valve B, a water flow sensor, a vacuum breaker valve, and a reverse valve B in this order, and the hot water pouring pipe at the tip is connected between the check valve A and the bypass pipe. This is the configuration I contacted.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIG. In FIG. 2, parts that are the same as those in FIG. 1, which is a conventional example, are given the same numbers. In Fig. 2, an instantaneous water heater 1 consists of an instantaneous water heater burner 2 and an instantaneous water heater heat exchanger 3, and one of the outlet sides 4 of the instantaneous water heater heat exchanger 3 is connected to the hot water supply pipe It connects to the hot water tap 5a through the other open/close valve B16.
．． Vacuum breaker valve 17. Check valve 81B is arranged in order, and pouring pipe 1
I am contacting 9.

The bathtub 7 consists of a bathtub burner 8 and a bathtub heat exchanger 9, and the inlet side 13 of the bathtub heat exchanger 9 is connected to the return pipe 15 from substantially the bottom of the bathtub 12. The circulation pump 14 is disposed in this order, and the outlet side 10 is disposed in the order of the check valve A20° and the outgoing pipe 11, and the bathtub 12 is disposed in this order.
The other side is connected to the bottom part.

In the above basic configuration, a bypass pipe 22 having an on-off valve A21 is provided between the return pipe 16 between the circulation pump 14 and the bathtub 12 and the outgoing pipe 11 on the upstream side of the check valve A20, and a molten metal pouring pipe 19 is provided. Connect the tip of check valve A20 and bypass pipe 22
We communicated between. In addition, the water flow sensor 23 is connected to the return pipe 15 and the outflow pipe 11, which are provided between the on-off valve B16 and the vacuum break valve 17 and which communicate with the bathtub 12. be. 1. The combined water heater is installed higher than the bathtub 12.

Next, we will discuss the operational aspects of instantaneous water heaters and bathtubs.

(1) In the case of normal hot water supply, the desired hot water obtained by an instantaneous water heater is sent out from a hot water tap at the tip of the hot water pipe through a hot water supply pipe. At this time, the on-off valve B is in a closed state.

(2) When reheating a normal bath, by operating the circulation pump while the bathtub is filled with water, the bathtub starts to burn, causing water in the bathtub to drain, outgoing pipes, etc.
It is heated to an appropriate temperature while being forced to circulate in the bathtub and then the return pipe.

At this time, the on-off valve M and the on-off valve B are in a closed state.

A check valve B is installed to prevent circulating hot water from being sent from the pouring pipe toward the vacuum break valve during circulation.

(3) When pouring water at the appropriate temperature into the bathtub When pouring water at the appropriate temperature into the bathtub, open/close valve B.

On-off valve A is open, and hot water obtained from the instantaneous water heater flows through on-off valve B, water volume control, and vacuum breaker valve.

It is sent to the outgoing tube through the enema tube, and the on-off valve A'
(The liquid is sent to the bathtub from the return pipe through the bypass pipe through the L-L. After cutting, the water is sent to the bathtub from both the outgoing pipe and the return pipe.

In this case, when the appropriate amount of hot water has been poured into the bathtub, the on-off valve Bi is closed and pouring of hot water is stopped.

A water flow sensor detects the flow rate per minute, and a microcomputer (not attached) calculates the amount of water to be dropped by measuring time, and opens and closes when a predetermined amount of water is poured. This sends a signal to valve B to stop it. By closing the on-off valve B, air is taken in from the vacuum breaker valve and mixed into the enema tube, thereby preventing hot water in the bathtub from flowing back toward the instantaneous water heater.

Furthermore, by providing the check valve A, it is possible to prevent heat radiation loss due to being sent to the heat exchanger side of the bathtub when pouring hot water.

The second configuration makes it possible to send a large amount of hot water at an appropriate temperature obtained by the instantaneous water heater into the bathtub through the forced circulation heating circuit of the bathtub. First, the forced circulation heating circuit has a pipe diameter smaller than that of normal hot water pipes (generally called paired tubes) in order to reduce heat loss from the pipes when reheating the bath. Therefore, even if we consider a configuration in which hot water at an appropriate temperature obtained by an instantaneous water heater is pumped into the bathtub through the circulation heating circuit of the bathtub, only a small flow rate can be pumped because the flow path pressure loss is large. As shown in one embodiment of the present invention, the flow rate can be increased by using a bypass pipe and an on-off valve A to feed water from both the outgoing pipe and the returning pipe of the circulation heating circuit.

1. When pouring hot water into the bathtub, the water flow sensor can detect the amount of hot water poured into the bathtub, making it possible to automatically stop pouring the hot water after it has started.

Effects of the invention (1) It is possible to send hot water at an appropriate temperature obtained by an instantaneous water heater through the circulation heating circuit of the bathtub, and it is possible to pour hot water with the lid of the bathtub closed, making it possible to save energy. (2) By sending hot water at an appropriate temperature obtained by an instantaneous water heater through both the outgoing and returning pipes of the bath circulation heating circuit, a large amount of hot water can be poured and hot water can be poured for a short time.

(3) After starting pouring, the amount of water dropped can be measured using a water flow sensor, and the pouring can be automatically stopped once the appropriate amount has been poured, greatly improving convenience.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating the principle of a conventional hot water bath system, and FIG. 2 is a diagram showing the principle configuration of a hot water bath system according to an embodiment of the present invention. 16... Open/close valve B117... Vacuum breaker valve, 18... Check valve B120... Check valve A, 21... Open/close Valve A122...Bypass pipe, 23...Water flow sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
151b

Claims (1)

[Claims] A return pipe, a circulation pump, and a heat exchanger for the bathtub are arranged in this order at the substantially lower part of the bathtub, and are connected to the other substantially lower part of the bathtub by an outgoing pipe, and a return pipe and an outgoing pipe are provided between the circulation pump and the bathtub. A forced circulation heating bath pot equipped with a bypass pipe having an on-off valve A, and an instantaneous water heater with the outlet side branched and one end connected to a hot water tap,
A hot water bath device in which an on-off valve B, a water flow sensor, and a vacuum break valve are arranged in this order, and the hot water pouring pipe at the tip is connected to the upstream side of the bypass pipe of the bath pot.