JP2502079Y2 - Air supply device for bath kettle with water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for supplying combustion air in a bathtub equipped with a water heater.

[Conventional technology]

FIG. 2 is a water / air system diagram showing a conventional example of a bath kettle with a water heater.

 Reference numeral 1 is a hot water supply section, and 2 is a bath hook section.

The heat exchanger 1a of the hot water supply unit 1 is heated by the high-temperature combustion gas generated in the gas burner 1b while circulating the water supply (in this example, tap water) supplied from the water supply pipe 3.

The water heated by the combustion gas becomes hot water and is supplied from the hot water tap 4. Combustion gas obtained by heating water is discharged into the atmosphere through the exhaust pipe 1c.

The heat exchanger 2a of the bath hook portion 2 is connected to the bath 5 via the forward pipe 5a and the return pipe 5b, and is heated by the high-temperature combustion gas generated in the gas burner 2b.

The hot water in the bathtub 5 is heated by the heat exchanger 2a and circulates by natural convection.

When the illustrated open / close valve 6 is opened, hot water from the hot water supply unit 1 is supplied into the bathtub 5.

In order to supply combustion air to the gas burner 1b of the hot water supply section 1, a forced draft fan 7 is provided, and in order to supply combustion air to the gas burner 2b of the bath hook section 2, a suction ventilation type fan is provided. A fan 8 is provided.

[Problems to be solved by the device]

In the conventional example shown in FIG. 2, since two fans 7 and 8 are installed, the entire apparatus becomes large and heavy, and the manufacturing cost is high.

Also, when both gas burners 1b and 2b are simultaneously burned,
The exhaust gas balance is poor, and the combustion state becomes unstable especially when the wind is strong.

A configuration as shown in FIG. 3 is also put into practical use so that the combustion air of both gas burners 1b and 2b is supplied by one fan 7 '. In this conventional example, the gas burner of the bath hook portion 2
The air duct 2c for supplying the combustion air to the 2b and the air duct 1d for supplying the combustion air to the gas burner 1b of the hot water supply unit 1 are connected at right angles to each other, and the right-angled connection part has a blower discharge pipe of the fan 7 '. Are connected.

Since the heating capacity of the hot water supply unit is generally larger than the heating capacity of the bath hook unit and the amount of air used is also large, the straightening vane 9 is provided to distribute the air flow rate in proportion to the amount of air used.

However, according to the configuration of FIG. 3, the air resistance of the straightening plate 9 is large, so that the blowing performance of the fan 7'is significantly diminished.

Moreover, when both the bath kettle and the hot water supply are used simultaneously, the exhaust gas balance is poor, and the combustion state becomes unstable, especially when the wind is strong.

The present invention has been made in view of the above circumstances, and the number of fans to be installed is only one, and the air blowing performance of the fans is not diminished by the air resistance of the duct part, and the bath pot part and the hot water supply part are provided. An object of the present invention is to provide an air supply device for a bath kettle with a water heater, in which the combustion state does not become unstable even when and are used simultaneously.

[Means for solving the problem]

To achieve the above object, the device of the present invention comprises a bath kettle part and a hot water supply part, wherein the bath kettle part is a heat exchanger for heating the hot water in the bathtub, and a gas burner for heating the heat exchanger. In the bath kettle with a water heater, wherein the hot water supply unit has a heat exchanger for heating the water supply and a gas burner for heating the heat exchanger, the gas burner of the bath furnace unit has combustion air. The air duct for the bath kettle that supplies the air and the air duct for the water heater that supplies the combustion air to the gas burner of the hot water supply section are connected in a straight line, and the air for combustion is commonly supplied to both gas burners. Is provided, and the air discharge pipe of the fan is connected to and communicates with both of the air ducts, and the angle formed by the air discharge pipe of the fan and the air duct for the bathtub is 70 degrees or more and 85 degrees or more. Below And wherein the Rukoto.

[Action]

According to the above configuration, one fan is commonly used to supply the combustion air of the gas burner for the bath kettle and the combustion air of the gas burner for the hot water supply unit, so that the overall configuration is small and lightweight. The cost is low.

In addition, the air outlet of the common fan intersects with the air duct of the bath gas burner at 70 to 80 degrees, and inevitably intersects with the air duct of the hot water supply gas burner at 100 to 110 degrees. With such an angle setting, proper air distribution is performed without increasing the air resistance of the duct portion, and a stable combustion state can be obtained even if both gas burners are used simultaneously.

〔Example〕

FIG. 1 is a water / air system diagram showing one embodiment of a bath kettle with a water heater according to the present invention.

This embodiment is an example improved by applying the present invention to the conventional example shown in FIG. Next, differences from the conventional example shown in FIG. 3 will be described.

An imaginary vertical line is formed by a bath kettle air duct 2c 'for supplying combustion air to the gas burner 2b of the bath kettle 2 and a hot water supply air duct 1d' for supplying combustion air to the gas burner 1b of the hot water supply unit 1. Align with a and connect in a straight line.

Shared fan 10 shared by the above gas burners 2b and 1b
Is provided so that the center line b of the discharge pipe 10a for blowing air intersects with the straight line a, and the discharge pipe 10a is connected to and communicates with the air ducts 2c ', 1d'.

The intersection angle θ between the center line b and the straight line a is set as follows. That is, the angle θ formed by the air duct 2c 'for the bathtub and the center line b is set to 80
Degree.

As a result, the hot water supply air duct 1d 'and the center line b inevitably intersect at 100 degrees.

When implementing the present invention, the angle θ is set to 70 degrees or more and 85 degrees or less.

According to the experiments conducted by the present inventors, when the angle θ exceeds 85 degrees, the flow rate of combustion air in the hot water supply gas burner becomes insufficient.

Further, if it is less than 75 degrees, the combustion air flow rate of the gas burner for the bath kettle becomes insufficient.

The required amount of combustion air for the gas burner in the hot water supply section is generally 3 to 4 times the required amount of combustion air for the bath gas burner, but by setting the angle θ as in this example,
Since the combustion air flow rate can be distributed without increasing the air resistance in the duct, a stable combustion state can be obtained.

[Effect of device]

As described above, if the air supply device for a bath kettle with a water heater according to the present invention is applied, the fan for the bath kettle and the fan for the water heater need only be one shared fan, so the entire device is compact, lightweight, and inexpensive. Moreover, there is no fear that the air blowing performance of the fan will be reduced by the air resistance of the duct portion, and a stable combustion state can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic air / water system diagram showing an embodiment of an air supply device for a bath kettle according to the present invention. 2 and 3 are schematic air / water system diagrams in a conventional example. 1 ... Hot water supply unit, 1a ... Heat exchanger, 1b ... Gas burner, 1c
...... Exhaust pipe, 1d, 1d ′ …… Air duct for hot water supply unit, 2 ……
Bath kettle, 2a …… heat exchanger, 2b …… gas burner, 5 ……
Bathtub, 7,7 ′, 8 …… fan, 9 …… rectifying plate, 10 …… shared fan, 10a …… blower discharge pipe.

Front Page Continuation (72) Inventor Takeo Yamaguchi 1287 Nishikubo, Chigasaki City, Kanagawa Prefecture (72) Inventor Shuichi Onodera 3158-1, Fukami, Yamato City, Kanagawa Prefecture (56) Reference JP-A-59-185937 (JP, A) Flat 2-110253 (JP, A) Actually open 64-28749 (JP, U) Actually open 60-60641 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A bath kettle part and a hot water supply part, wherein the bath kettle part has a heat exchanger for heating the hot water in the bathtub and a gas burner for heating the heat exchanger. Is a bath kettle with a water heater that has a heat exchanger that heats the water supply and a gas burner that heats the heat exchanger, and an air duct for the bath kettle that supplies combustion air to the gas burner of the bath kettle. A hot water supply air duct for supplying combustion air to the gas burner of the hot water supply unit is linearly connected, and a common fan for supplying combustion air to both of the gas burners is provided. The air discharge pipe of the fan is connected and communicated with both of the air ducts, and the angle formed by the air discharge pipe of the fan and the air duct for the bathtub is 70 degrees or more and 85 degrees or less,
Air supply device for bath kettle with water heater.