JPH0740935Y2 - Cleaning device for bath pot with water heater - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention comprises a bath kettle heat exchanger and a hot water supply heat exchanger, and hot water heated by the hot water supply heat exchanger is exchanged for the bath kettle. The present invention relates to a cleaning device for a bath with a water heater, which is designed to supply hot water into a bathtub via a water heater.

[Conventional technology]

 FIG. 3 is a schematic diagram showing the bath kettle with a water heater.

In the casing 1, a bath combustion chamber 2 and a hot water supply combustion chamber 3
In addition to the above, the casing 1 is provided with an intake port 4 for taking in combustion air.

Reference numeral 5 is a fan for supplying combustion air.

The bath combustion chamber 2 is provided with a bath side burner 6 and a bath side heat exchanger 7, while the hot water supply combustion chamber 3 is provided.
A hot-water supply side burner 9 and a hot-water supply heat exchanger 10 are provided in the.

The combustion fan 5 supplies the air sucked into the casing 1 from the intake port 4 to the bath side burner 6 and the hot water supply side burner 9. The bath-side burner 6 burns the fuel gas supplied from the gas supply pipe 12 through the bath-side proportional valve 11,
The combustion gas is discharged from the exhaust port 13 via the heat exchanger 7 on the bath side.

The bath-side heat exchanger 7 and the bathtub are communicated with each other through upper and lower two reheating pipes 16 and a reheating pipe 15, and the bath-side heat exchanger 7 and the reheating pipe line are connected to each other. When water (hot water) is supplied into the bathtub via the water, the heat exchanger is also filled with water (hot water) of the same water level at the same time, and in this state, the bath-side burner 6
When the water in the bath side heat exchanger 7 is heated with, the hot water heated from the inside of the heat exchanger 7 by its natural draft force is used as an additional pipe for reheating.
It is a type that pushes it into the bathtub through 16 and sucks the water (hot water) in the bathtub from the reheating pipe 15 for natural circulation, but in this embodiment, the circulation of the hot water at the time of heating is A circulation pump (14) is provided between the additional heating forward pipe (16) and the return pipe (15) in order to accelerate the operation and to extend the installation interval between the bathtub and the appliance.

The combustion fan 5 also supplies the air sucked into the casing 1 from the intake port 4 to the hot water supply side burner 9. The hot water supply side burner 9 burns the fuel gas supplied from the gas supply pipe 12 via the hot water supply side proportional valve 17, and the combustion gas is discharged from the exhaust port 13 via the hot water supply heat exchanger 10.

The water supply supplied from the water supply pipe 18 to the hot water supply heat exchanger 10 is heated while flowing through the hot water supply heat exchanger 10 and distributed through the hot water supply pipe 19.

Reference numeral 21 denotes a control unit, which is given a command from the remote controller 22.

Temperature sensor 24a for detecting hot water temperature of heat exchanger 10 for hot water supply
Of the temperature sensor 24b and the output signal of the temperature sensor 24b provided in the reheating fire pipe 16 are input to the control unit 21.

When the hot water button 22a of the remote controller 22 is pressed, the solenoid valve 23 is opened, fuel gas is supplied to the hot water supply side burner 9, the fan 5 is operated and combustion air is supplied, and the hot water supply side burner 9 is supplied. It is ignited and burned.

Since the solenoid valve 23 is opened as described above, the water supplied from the water supply pipe 18 flows through the hot water supply heat exchanger 10 and the electromagnetic valve 23, and then passes through the bath side heat exchanger 7 and the additional heating return pipe 15. , Injected into the bathtub.

The water supply is heated by the high-temperature combustion gas generated in the hot water supply side burner 9 when flowing through the hot water supply heat exchanger 10.

The temperature is detected by the temperature sensor 24a and input to the control unit 21.

The control unit 21 adjusts the input signal from the temperature sensor 24a to the temperature set by the remote controller 22,
The hot water supply side proportional valve 17 is controlled to automatically adjust the fuel gas flow rate.

The water level in the bathtub is detected by a water level gauge 25, which is a pressure sensor attached below the additional heating pipe 16 (upper circulation pipe) for reheating the bath kettle, and when the water level set by the remote controller 22 is reached, the control unit 21 Stops the combustion of the hot water supply side burner 9, closes the solenoid valve 23, stops the fan 5, and ends the automatic filling operation. In this way, in the bathtub,
Hot water at the set temperature is filled to the set water level. A check valve and a vacuum breaker are incorporated in the solenoid valve 23.

The water in the bathtub has cooled, or the remote controller 22
When the additional heating button 22b is pressed, the control unit 21 supplies the fuel gas to the bath side burner 6 and operates the fan 5 to activate the circulation pump 14 to ignite the bath side burner 6 to perform combustion. .

The hot water in the bathtub is sucked in from the additional heating return pipe 15 as indicated by an arrow A and discharged from the additional heating upstream pipe 16 as indicated by an arrow B to be circulated and reheated to gradually raise the temperature. The temperature is detected by the temperature sensor 24b and input to the control unit 21.

When the signal output of the temperature sensor 24b reaches the set temperature, the control unit 21 cuts off the fuel gas supply to the bath side burner 6 and stops the fan 5 and the circulation pump 14.

As described above, hot water at an appropriate temperature (for example, 42 ° C.) is automatically filled in the bathtub, and when the hot water in the bathtub is cooled, it is heated until it reaches the appropriate temperature.

[Problems to be solved by the device]

The inner surface of the bathtub can be washed relatively easily, but the hot water forward pipe 16 for circulating hot water in the bathtub, the hot water return pipe 15,
And the inner case including the bath side heat exchanger 7 is not easy to clean.

For this reason, scales adhere to the inner surfaces of these portions, and products precipitate and accumulate on the bottom surfaces.

The main deposits are bacteria, carcasses, organic substances such as lipids, sugars and proteins.

According to the actual measurement by the present inventors, the number of bacteria in the residual water in the bath after several hours after bathing was 1 to 10 million per 1cc.

Even if you insert a hose from the circulation port of the bathtub and wash with tap water,
It cannot be washed off in every corner, and water at room temperature has no bactericidal effect.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cleaning device capable of sterilizing the inside of a heat exchanger for a bathtub to remove scale and deposits.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the cleaning device of the present invention comprises a bath kettle heat exchanger and a hot water supply heat exchanger, and the bath kettle heat exchanger and the bathtub are provided with two upper and lower reheating conduits. A bath kettle equipped with a water heater, which is made to communicate through the hot water supply heat exchanger for supplying hot water to the bathtub via the bath heater heat exchanger and the additional heating line. A temperature sensor for detecting the hot water supply temperature of the hot water supply heat exchanger, a control unit for controlling the flow rate of the fuel gas supplied to the hot water supply gas burner by receiving the detection signal of the temperature sensor, and for giving a command to the control unit. And a remote controller provided with a hot water heater with a water level sensor for detecting the water level in the bathtub in the heat exchanger for a bath tank, wherein the remote controller is provided with an operating member for cleaning operation. The control unit is When a washing operation command is received from the moat controller, the hot water supply gas burner is controlled so that the hot water supply heat exchanger's hot water output temperature is 60 ° C or higher on condition that the water level sensor detects that the bath water level is lower than the water level sensor. Is characterized by having a function of controlling the flow rate of the supplied gas.

[Action]

According to the above configuration, on condition that the water level sensor detects that the bath water level is equal to or lower than the water level sensor, the hot water of 60 ° C or higher heated by the hot water supply heat exchanger is passed through the bath side heat exchanger. Since it flows into the bathtub, the inside of the bath can be sufficiently sterilized.

That is, in the bath kettle to which the present invention is applied, since the bath-side heat exchanger is filled with water (hot water) at the same level as the bath water level, high-temperature water cannot be discharged in the presence of bath water above the water level sensor. Even if pouring the hot water, most of it is separated into the upper part and the sufficient sterilizing effect cannot be obtained, but in the present invention, the hot water is made to flow in on the condition that it is detected that the bath water level is below the water level sensor. Therefore, the inside of the bath can be sufficiently sterilized.

〔Example〕

FIG. 1 is a schematic view showing an embodiment of a bathtub with a water heater equipped with the cleaning device according to the present invention.

This embodiment is an improvement in which the present invention is applied to the conventional example shown in FIG. 3, and the elements having the same drawing reference numerals as those in FIG. 3 have the same or similar construction as in the conventional example. It is a member.

The operation when the hot water filling button 22a is pressed and the operation when the reheating button 22b is pressed are the same as those in the conventional example.

The remote controller 22 of this embodiment has a cleaning button 22c.
Is provided.

The operation when the washing button 22c is pressed is the hot water button 2
It is similar to the operation when 2a is pressed, but it is controlled so that hot water of 60 ° C or higher will come out.

The above control is performed by the control unit 21 controlling the hot water supply side proportional valve 17 so that the output signal of the temperature sensor 24a becomes 60 ° C. or higher.

FIG. 2 is a flowchart showing the operation.

When the cleaning button 22c is pressed (flow a), it is determined whether or not the water level in the bathtub is 25 or less (flow b). This is because when the water level in the bathtub is 25 or more, the water level in the bath side heat exchanger 7 is at the same level as that, and therefore even if washing with hot water as described below cannot be performed sufficiently.

When the water level in the bathtub is high, the bathtub water is discharged and the process proceeds to flow c to monitor whether or not the water level in the bathtub lowers. If not, the washing operation instruction is reset (flow d). , If the water level in the bathtub drops, the process returns to flow b.

Then, when the water level in the bathtub becomes 25 or less, the flow proceeds to flow c and it is determined whether or not hot water is being used. This determination is made by a flow sensor (not shown). As is clear from FIG. 1, when the hot water tap 25 is opened and hot water is used, the solenoid valve 23 is opened to pour water into the bathtub.
This is because the hot water coming out of is blocked.

If it is determined in the flow e that the hot water supply is not in use, the flow f
Proceed to and determine whether or not fully automatic operation is in progress.

If the automatic operation is in progress, the flow proceeds to step g to reset the washing operation instruction and continue the automatic operation.

If not in the fully automatic operation, the flow proceeds to flow h, and the solenoid valve 23 for pouring is turned on (opened).

At this time, the control unit 21 receives an instruction from the remote controller 22, controls the hot water supply side proportional valve 17, and automatically controls the supply gas flow rate so that the output signal of the temperature sensor 24a maintains 60 ° C. or higher. As a result, hot water of 60 ° C. or higher is discharged into the bath-side heat exchanger 7 through the solenoid valve 23, and is discharged into the bathtub through the return heating pipe 15 (flow i).

In this way, while hot water of 60 ° C. or higher is being discharged for cleaning, it is monitored whether the hot water tap 25 is opened to supply hot water (flow j), and when hot water is used, the flow proceeds to flow k. Then, the solenoid valve 23 for pouring is closed, the washing operation instruction is reset (flow 1), and the hot water supply operation is performed.

When it is determined in the above flow j that the hot water supply is not being used, the elapsed time is measured while monitoring the use of the hot water supply (flow m), and when the predetermined time has elapsed, the combustion of the hot water supply side burner 9 is stopped (flow n). The solenoid valve 23 for pouring is closed (flow p), and the cleaning is finished (flow q).

According to the experiments conducted by the present inventors, when the number of germs in 1 cc of residual water in the bath is 1 to 10 million, when pouring hot water at 60 to 70 ° C, the number of germs in 1 cc is 10 or more. I got 100.

When pouring hot water above 80 ℃, the number of bacteria in 1cc became zero.

[Effect of device]

As described above, according to the cleaning device of the present invention, hot water of 60 ° C or higher is poured into the bath side heat exchanger on condition that the water level in the bathtub is below the water level gauge. The inside of the side heat exchanger can be easily sterilized by heating to prevent the adhesion of scale and the accumulation of precipitates.

[Brief description of drawings]

FIG. 1 is a schematic system diagram of a bathtub with a water heater equipped with an embodiment of the cleaning apparatus according to the present invention, and FIG. 2 is a flow chart for explaining the method of use and operation in the above embodiment. . FIG. 3 is a schematic system diagram of a conventional bath kettle with a water heater. 1 ... Casing, 2 ... Bath combustion chamber, 3 ... Hot water supply combustion chamber, 6 ... Bath side burner, 7 ... Bath side heat exchanger,
9: Hot water supply side burner, 10: Hot water supply heat exchanger, 11: Bath side proportional valve, 12: Gas supply pipe, 13: Exhaust port, 14:
Circulation pump, 15 ... Return pipe for heating, 16 ... Forward pipe for heating, 17 ... Proportional valve for hot water supply side, 18 ... Water supply pipe, 19 ... Hot water supply pipe, 21 ... Control section, 22 ... Remote controller, 23 ...
… Solenoid valve (with built-in check valve and vacuum breaker), 24
a, 24b ... Temperature sensor.

Claims (1)

[Scope of utility model registration request] A heat exchanger for hot water supply and a heat exchanger for hot water supply are provided, and the heat exchanger for bath water and the bathtub are made to communicate with each other through two upper and lower reheating conduits, and the heat for hot water supply is provided. A bath kettle with a water heater for heating hot water heated by an exchanger into a bathtub via the heat exchanger for bath kettle and the additional heating pipe line,
A temperature sensor for detecting a hot water outlet temperature of the hot water supply heat exchanger, a control unit for controlling a fuel gas flow rate supplied to the hot water supply gas burner by receiving a detection signal of the temperature sensor, and for giving a command to the control unit. And a remote controller provided with an operating member for cleaning operation, wherein the remote controller is provided with an operation member for washing operation. When the control unit receives a cleaning operation command from the remote controller, the outlet temperature of the hot water supply heat exchanger is 60 if the water level sensor detects that the bath water level is equal to or lower than the water level sensor. A bath heater cleaning device with a water heater, having a function of controlling a supply gas flow rate of a hot water gas burner so as to be equal to or higher than ° C.