JP2000193313A - Hot water supply bath device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the discharge of hot water at high temperature from a hot water supply plug by controlling a bypass control valve in full open position, even if a juxtaposed eat exchanger for hot water supply is heated by the heating of a heat exchanger for additional stoking at additional stoking operation of a single-boiler two-water system of heat exchanger. SOLUTION: For a single-boiler two-water system of heat exchanger, a heat exchanger 7 for hot water supply and a heat exchanger 7 for additional stoking are arranged side by side and they are heated with the same burner 6. At additional stoking operation, bathtub water 14 circulates by a circulation pump 12, the circulation via a return pipe 15 is detected by a flow water detector 16, a fan 3 for combustion rotates, a gas proportional valve 5 opens, the burner 6 ignites, and the water is heated with a heat exchanger 17 for additional stoking and circulates to a bathtub 13 by a forward pipe 18. Moreover, the heat exchanger 7 for hot water supply is heated at the same time, and the temperature of the hot water within this heat exchanger 7 goes high. At this time, even if the user opens a hot water supply plug 1, the hot water at high temperature within the heat exchanger 7 for hot water supply is controlled not to be discharged, being mixed with water on water entry side since the bypass control valve 8 is in full open position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply bath apparatus capable of supplying hot water and additional heating.

[0002]

2. Description of the Related Art A conventional combustion apparatus of this type has a structure as shown in FIG. That is, in the hot water supply operation, when the hot water tap 1 is opened, the water quantity sensor 2 detects water flow, the combustion fan 3 rotates, the gas source solenoid valve 4, the gas proportional valve 5
Is opened, the burner 6 is ignited, and heated by the hot water supply heat exchanger 7. The hot water heated by the hot water supply heat exchanger 7 is mixed with the water on the water inlet side by a bypass control valve 8 provided on the water inlet side of the hot water supply circuit. The degree of opening of the bypass control valve 8 is adjusted by the signal of the tapping thermistor 10 so that the mixed hot water has the hot water supply set temperature set by the remote control remote controller 9,
Hot water is supplied from hot water tap 1 through hot water supply connection port 11.

Next, in the reheating operation, when the circulation pump 12 detects the circulation of the bath water 14 of the bath 13 through the bath return pipe 15 and the flowing water detecting unit 16, the combustion fan 3 rotates, The gas source solenoid valve 4 and the gas proportional valve 5 are opened, and the burner 6 is ignited, heated by the reheating heat exchanger 17 and circulated from the bath pipe 18 to the bathtub 13.

[0004]

However, in the conventional one-can, two-water hot water supply bath apparatus, during the reheating operation, the reheating heater 17 is heated and the hot water heat exchanger 7 is also heated. When the temperature of hot water in the hot water supply heat exchanger 7 becomes high and the bypass control valve 8 is closed, opening the hot water tap 1 may cause a problem that hot water may be discharged.

[0005]

In order to solve the above-mentioned problems, the present invention is provided with control means for controlling the bypass control valve to the "fully open" position during the reheating operation.

According to the above invention, during the reheating operation, the bypass control is performed even if the reheating heater is heated and the hot water supply heat exchanger is heated to make the hot water temperature in the hot water supply heat exchanger high. Since the valve is controlled to the “fully open” position, it is possible to control so that hot water is not discharged even when the hot water tap is opened.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a one-can-two-water heat exchange system in which a heat exchanger for hot water supply and a heat exchanger for additional heating are provided side by side and heated by the same burner. A bypass control valve for mixing the hot water provided on the water inlet side of the hot water supply circuit with the hot water heated by the hot water supply heat exchanger and the water on the water inlet side to adjust the temperature to the set temperature set by the external input device; A circulating pump that circulates bath water from the bath tub to the reheating heat exchanger, and a flowing water detecting unit that detects the circulation of bath water by the circulating pump, wherein the circulating pump circulates and the flowing water detecting unit Is provided with a control means for controlling the bypass control valve to a "fully open" position when the reheater heat exchanger is being heated by the burner by detecting the circulation. Heating the heat exchanger for heating and heating the heat exchanger for hot water supply, heat exchange for hot water supply Even hot water temperature of the internal is heated to a high temperature,
Since the bypass control valve is controlled to the “fully opened” position, it is possible to control so that hot water is not discharged even when the hot water tap is opened.

According to a second aspect of the present invention, there is provided a one-can, two-water heat exchanger in which a heat exchanger for hot water supply and a heat exchanger for reheating are provided side by side and heated by the same burner. A heat exchanger outlet temperature sensor provided at the exchanger outlet to detect the outlet temperature of the heat exchanger, and hot water provided on the water inlet side of the hot water supply circuit and heated by the hot water supply heat exchanger, and water on the water inlet side are mixed and externally mixed. A bypass control valve for adjusting to a set temperature set by the input device; a recirculation pump for circulating bath water from the bath to the reheating heat exchanger in the reheating circuit; and detecting a circulation of the bath water by the circulation pump. A flowing water detection unit, wherein the circulation pump circulates and the flowing water detection unit detects the circulation, and when the reburning heat exchanger is being heated by the burner, a signal of the heat exchanger tapping temperature sensor. Control means for controlling the opening of said bypass control valve by means of During the reheating operation, even if the reheating heat exchanger is heated and the hot water supply heat exchanger is heated, and the temperature of the hot water in the hot water supply heat exchanger becomes high, the heat exchanger outlet temperature sensor is used. By controlling the opening temperature of the bypass control valve so as to be equal to or lower than the predetermined temperature by controlling the opening temperature of the bypass control valve, the hot water can be controlled so that hot water is not discharged even when the hot water tap is opened.

According to a third aspect of the present invention, in the event of a power failure, a full-open control means for controlling the degree of opening of the bypass control valve to the "fully-open" position is provided. Even if the temperature of the hot water in the heat exchanger for hot water supply becomes high,
Since the bypass control valve is controlled to the “fully open” position, it is possible to control so that hot water is not discharged even when the hot water tap is opened.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example will be described with the same reference numerals.

(Embodiment 1) FIG. 1 is a configuration diagram of a hot water supply bath apparatus according to Embodiment 1 of the present invention. In FIG. 1, during hot water supply operation, when a hot water tap 1 is opened, a water quantity sensor 2 detects water flow, a combustion fan 3 rotates, a gas source solenoid valve 4 and a gas proportional valve 5 open, and a burner 6 is ignited. Heat exchanger 7 for hot water supply
Heated. The hot water heated by the hot water supply heat exchanger 7 is mixed with the water on the water inlet side by a bypass control valve 8 provided on the water inlet side of the hot water supply circuit. The degree of opening of the bypass control valve 8 is adjusted by the signal of the tapping thermistor 10 so that the mixed hot water reaches the hot water set temperature set by the remote control 9 for remote control, and the hot water is supplied from the hot water tap 1 through the hot water supply connection port 11. .

Next, in the reheating operation, when circulation of the bathtub water 14 of the bathtub 13 by the circulation pump 12 through the bath return pipe 15 is detected by the flowing water detecting unit 16, the combustion fan 3 rotates, The gas source solenoid valve 4 and the gas proportional valve 5 are opened, and the burner 6 is ignited, heated by the reheating heat exchanger 17 and circulated from the bath pipe 18 to the bathtub 13. Here, the components are controlled by the control unit 9a.

[0013] Here, one can 2 of a system in which a heat exchanger 7 for hot water supply and a heat exchanger 17 for additional heating are provided side by side and heated by the same burner 6.
Because of the water-type heat exchanger, during the reheating operation, the reheating heat exchanger 17 is heated and the hot water supply heat exchanger 7 is heated, so that the temperature of the hot water in the hot water supply heat exchanger 7 is high. At this time, since the bypass control valve 8 is controlled to the “fully open” position even when the hot-water tap 1 is opened, the hot water in the hot-water supply heat exchanger 7 is mixed with the water on the inlet side, and the hot water is removed. It is possible to control not to discharge.

(Embodiment 2) A hot water supply bath apparatus according to Embodiment 2 of the present invention will be described with reference to FIG.

When the additional heat exchanger 17 is being heated, the hot water tap 1 is detected by a signal from a heat exchanger outlet temperature sensor 19 for detecting the outlet temperature of the heat exchanger provided at the outlet of the heat exchanger 7 for hot water supply. The temperature of the hot water from the hot water tap 1 is controlled to be equal to or lower than a predetermined temperature by adjusting the opening of the bypass control valve 8.
It is possible to control so that hot water is not discharged even if is opened.

(Embodiment 3) A hot water supply bath apparatus according to Embodiment 3 of the present invention will be described with reference to FIG.

In the reheating operation, when the power is interrupted when the reheating heat exchanger 17 is heated and the hot water temperature in the hot water supply heat exchanger 7 is high, the opening of the bypass control valve 8 is controlled. Is provided with a full-open control means 20 using an auxiliary power supply or the like so as to control the position of the hot water to the "full open" position.

[0018]

As is apparent from the above description, according to the present invention, during the reheating operation, the reheating heat exchanger is heated and the hot water supply heat exchanger is heated, so that the hot water in the hot water supply heat exchanger is heated. When the temperature is high, the bypass control valve is controlled to the “fully open” position, or the opening of the bypass control valve is adjusted by a signal from the heat exchanger tapping temperature sensor,
Furthermore, at the time of a power failure, the opening degree of the bypass control valve is controlled to the “fully opened” position, so that the effect of preventing the discharge of hot water from the hot water tap is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a hot water supply bath apparatus according to Embodiments 1 and 2 of the present invention.

FIG. 2 is a configuration diagram showing a hot water supply bath apparatus according to a third embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional hot water supply bath apparatus.

[Explanation of symbols]

 7 Heat Exchanger for Hot Water Supply 8 Bypass Control Valve 16 Flowing Water Detector 17 Heat Exchanger for Additional Heating 19 Heat Exchanger Hot Water Temperature Sensor 20 Fully Open Control Means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Funabashi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shuichi Takemura 1006 Odaka Kadoma Kadoma City Osaka Pref. Terms (reference) 3L024 DD04 DD13 DD16 DD27 GG04 GG28 HH14 HH17

Claims (3)

[Claims] 1. A one-tank two-water heat exchanger in which a heat exchanger for hot water supply and a heat exchanger for reheating are provided side by side and heated by the same burner, and the heat exchanger for hot water supply provided on the water inlet side of a hot water supply circuit. A bypass control valve for mixing the hot water heated by the heat exchanger and the water on the inlet side to adjust the temperature to a set temperature, and a circulation provided in the reheating circuit to circulate bath water from the bath to the reheating heat exchanger. A pump,
A running water detector that detects that the bathtub water has circulated,
A hot water supply bath having control means for controlling the bypass control valve to a "fully open" position when the flowing water detecting section detects the circulation and heating the reheating heat exchanger with the burner; apparatus. 2. A one-can, two-water heat exchanger having a heat exchanger for hot water supply and a heat exchanger for reheating, which are heated by the same burner, and provided at an outlet of the heat exchanger for hot water supply. A hot water outlet temperature sensor, a hot water heater provided on the water inlet side of the hot water supply circuit, a hot water heated by the hot water supply heat exchanger, and a bypass control valve for mixing the water on the water inlet side to adjust the temperature to a set temperature; A circulation pump provided in the circuit and configured to circulate bathtub water from the bathtub to the additional heat exchanger, and a flowing water detection unit that detects that the bathtub water has circulated, detects that the flowing water detection unit has circulated. And a control means for controlling the degree of opening of the bypass control valve by a signal from the heat exchanger tapping temperature sensor when the additional heat exchanger is being heated by the burner. 3. The hot-water supply bath apparatus according to claim 2, wherein at the time of a power failure, the full-open control means controls the opening degree of the bypass control valve to a “fully open” position.