JPH01222115A - Bath heater with hot water supplying device - Google Patents

Abstract

PURPOSE:To shorten a hot water supplying time and obviate frequent starting and stopping of s pump, by providing a float switch for closing a valve communicating with a hot water supply heat exchanger when a cistern for receiving hot water supplied through the valve is filled up with hot water, a float valve for controlling the quantity of hot water discharged from the cistern, and a pump for feeding hot water into a bathtub. CONSTITUTION:Water supplied through a feed water port 5 is supplied with heat generated by a burner 4 through a hot water supply heat exchanger 7, to become hot water, which is supplied through a water/hot water mixing valve 8 and a valve 10 into a cistern 12. A float switch 11 is provided at an upper pert of the interior of the cister 12. If the water level in the cister 12 is raised, a signal from the float switch 11 closes the valve 10 to prevent an overflow of hot water from the cister 12. A float valve 13 is provided at an outlet part of the cister 12. When the water level in the cister 12 is lowered, the float valve 13 controls the flow rate of hot water supplied to a pump 2, thereby maintaining the water level in the cister 12 to be constant and preventing air from being sucked into the pump 2. The hot water reaching the pump 2 is fed into a bathtub 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bathtub with a water heater that supplies hot water heated by a hot water supply heat exchanger to a bathtub via a cistern and a pump.

BACKGROUND OF THE INVENTION As shown in FIG. 2, in a conventional bathtub with a water heater, water supplied from a water supply port 6 is heated by a hot water supply heat exchanger 7.
The water is received by the cistern 12 via the hot water/water mixing valve 8, the valve 1o, and the pole tap 23, and is further conveyed to the bathtub 1 by the pump 2 via the switching valve 3 that communicates with the cistern 12. The pump 2 is controlled by a float switch 21 provided at the bottom of the cistern 12, and the pump 2 is stopped when the water level in the cistern 12 decreases. Further, the hot water supplied to the cistern 12 is controlled so that the pole tap 23 does not overflow the cistern 12 with hot water. In addition, 4 is a burner, 6 is a heat exchanger for a bathtub, and 9 is a main body of a water heater.

(Refer to Japanese Utility Model Application Publication No. 62-173656.) Problems to be Solved by the Invention However, in the bathtub with a water heater as described above, a pole tap 23 is installed in the water channel leading from the water supply port 6 to the cistern 12. Therefore, there is a problem in that the pressure loss of the hot water flowing through the water channel becomes large, and the flow rate of hot water supply decreases, so that the time required to supply hot water to the bathtub 1 increases.

Furthermore, if the water supply pressure applied to the water supply port 6 decreases, the flow rate of hot water from the pole tap 23 decreases and the water level in the cistern 12 decreases, causing the float switch 21 to cause the pump 2 to repeatedly start and stop. The sound of pump 2 starting and stopping was jarring.

The present invention solves the above problems and provides a bathtub with a water heater that can shorten hot water supply time with a simple configuration and eliminates frequent starting and stopping of the pump 2.

Means for Solving the Problems In order to solve the above problems, the bathtub with water heater of the present invention has a hot water supply heat exchanger that heats water supplied from a water supply port, and a hot water supply heat exchanger that communicates with the hot water supply heat exchanger. a valve; a cistern for receiving hot water supplied from the valve; a float switch for controlling the valve to close when the cistern is full; It is equipped with a float valve that controls the amount of hot water discharged from the bathtub, and a pump that communicates with the float valve and conveys hot water to the bathtub.

Function According to the above configuration, hot water is supplied to the cistern via the valve, and when the water level in the cistern rises, the valve connected to the float switch that detects the water level in the cistern is closed and hot water overflows from the cistern. to prevent Also,
If the water level in the system turn decreases due to fluctuations in the power supply voltage, fluctuations in the water supply pressure applied to the water supply inlet, or due to the installation method,
A float valve installed at the outlet of the cistern controls the flow rate of hot water into the pump, so the water level in the cistern remains constant even when the pump is operated continuously, and the pump does not suck in air.

EXAMPLE Hereinafter, a bathtub with a water heater according to an example of the present invention will be explained with reference to FIG. In FIG. 1, the same components as those of the conventional example are given the same reference numerals, and their explanations will be omitted. That is, water supplied from the water supply port 6 receives heat generated by the burner 4 and is converted into hot water by the hot water supply heat exchanger 7, and is supplied to the cistern 12 through the hot water mixing valve 8 and the valve 1o. There is a float switch 11 in the upper part of the cistern 12, and if the water level in the cistern 12 should rise, the valve 1o will be closed by the signal from this float switch 11.
Prevent overflow of hot water from 2.

A float valve 13 is provided at the outlet of the cistern 12, and when the water level in the cistern 12 decreases due to fluctuations in the power supply voltage of the pump 2 or fluctuations in the water supply pressure applied to the water supply port 6, the float valve 13 is connected to the pump 2. The water level in the cistern 12 is kept constant by controlling the hot water supply flow rate to prevent air from being sucked into the pump 2. The hot water that has reached the pump 2 is transported to the bathtub 1. The switching valve 3 is a valve that switches to either the bathtub heat exchanger 6 or the cistern 12.

With the above configuration, almost no pressure loss is added to the hot water supplied to the cistern 12, so the flow rate of hot water supply is maintained at its maximum. In addition, since the hot water sent to the bathtub via the pump 2 is regulated by the float valve 13, the pump 2 is normally in an activated state, and frequent activation and deactivation of the pump 2 does not generate unpleasant noise.

Effects of the Invention As is clear from the description of the embodiments above, the bathtub with water heater of the present invention has no ball tap in the waterway between the valve communicating with the hot water supply heat exchanger and the cistern. The pressure loss of hot water can be reduced and the time required to supply hot water to the bathtub can be shortened by ensuring a sufficient flow rate of hot water. Furthermore, since there is a float valve at the outlet of the cistern, even if the water level in the cistern drops, the float valve controls the amount of hot water supplied to the pump, and air will not be sucked into the pump.

Furthermore, since the pump operates continuously, the unpleasant noise that occurs when the pump starts and stops can be prevented. Furthermore, the float valve only needs to have the ability to throttle the flow rate of hot water, and does not need to have the ability to completely close it, so it has the advantage that it can be provided at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a bathtub with a water heater showing an embodiment of the present invention, and FIG. 2 is a system diagram of a conventional bathtub with a water heater. 1... Bathtub, 2... Pump, 6...
... Water supply inlet, 7 ... Heat exchanger for hot water supply, 1o.
... Valve, 11 ... Float switch, 1
2... Cistern, 13... Float valve. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
-Raku Ichito 2--Ichigo Nfu. 5-卦水口7- Deluxe general-purpose holder

Claims (1)

[Claims] a hot water heat exchanger that heats water supplied from a water supply port;
a valve that communicates with the hot water supply heat exchanger; a cistern that receives hot water supplied from the valve; and a float switch that controls the valve to close when the cistern is full of water;
A water heater comprising: a float valve installed at the outlet of the cistern to control the amount of hot water discharged from the outlet of the cistern according to the water level in the cistern; and a pump communicating with the float valve to convey hot water to a bathtub. Comes with a bath kettle.