JP2559154B2 - Forced air supply two-can type water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compulsory unit with a fan equipped with two boiling water cans for different uses, for example, for hot water supply to a bathtub and hot water supply to a shower. The present invention relates to a supply type two-can type gas water heater.

[Conventional technology]

Regarding a gas water heater of a type in which two kettles that share an intake passage and an exhaust passage, which are provided below and above the kettle, respectively, are combined, one of the combustion pause cans is divided into two parts so that the air supply passage is divided into two. A technique for providing a damper for closing the air supply port to the air has already been developed.

[Problems to be Solved by the Invention]

The above-mentioned gas water heater has two cans with different hot water supply capacities depending on the respective usage conditions.
It was extremely difficult for both of these two can heating burners to work satisfactorily with maximum combustion efficiency.

An object of the present invention is to provide a forced air supply type two-can type water heater capable of maintaining the combustion state of each can in the optimum state when the two cans are operated with different hot water supply capacities.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention shares a supply port of air by a fan and an exhaust port of combustion gas, and also has a burner and a heat exchanger, respectively, for a forced-air-supply type two-can-type water heater. In the container, each of the supply port and the exhaust port is provided with a damper having a shape such that when one side of the opening moves to the closed side so as to divide the opening area into two, the other side moves to the opened side. When both burners are in a strong combustion state, each damper is set to a neutral state, and the gas supply amount to each of the burners is different, and when each burner is in a different combustion state, the damper at the supply port has a small gas supply and a weak combustion side The configuration is such that the air supply opening of the can is narrowed and the damper of the exhaust port is rotated so as to narrow the exhaust opening of the can on the burner side where a large amount of gas is supplied and strong combustion occurs.

[Operation and effect of the invention]

In the case of a strong combustion condition for each burner, if each damper is made neutral, an amount of air commensurate with the combustion is supplied to each can, and the combustion condition of each burner can be maintained at the optimum condition.

In order to supply a small amount of air to the burner, which supplies a small amount of gas and is weakly burning, the supply opening to the can on the weakly burning side is narrowed. However, since the intake opening on the strong combustion side is widened, the exhaust opening on the strong combustion side is narrowed to prevent the supply air amount on the strong combustion side from becoming excessive.

Therefore, even when the burners have different combustion states, the cans are supplied with an amount of air commensurate with the combustion, and the combustion states of the burners are both maintained in the optimum state.

〔Example〕

Hereinafter, the forced air supply type two can type water heater of the present invention will be specifically described with reference to the accompanying drawings.

FIG. 1 is a sketch including a schematic cross-sectional view of a water heater, which illustrates a situation where the water heater of the present invention is installed in a building in order to serve both as a hot water supply to a bathtub and a washbasin. A water heater having a combined structure of two kettles 1 and 2, B is a kettle 1 and a bathtub connected by two water circulation pipes 21 and 22, 24 is a pump for forced circulation, and C is a kettle 2 and hot water supply. Tube D
It is a group of hot water taps in the bathroom and bathroom that are connected by.

The kettles 1 and 2 are formed by winding burners 3 and 4 in the lower part of combustion cylinders 19 and 20, heat exchangers 5 and 6 in the upper part, and water pipes spirally outside the combustion cylinders, respectively. It is constructed by assembling shaped water jackets 7 and 8 and has a supply port 9 for pressurized air generated by a constant speed rotary fan 11 at the lower bottom and an exhaust port 10 for combustion gas at the top end. However, it is provided so as to be shared by these two kettles 1 and 2.

Each of the pressurized air supply port 9 and the exhaust port 10 has a shape that divides the opening area into two parts, and when one side of the opening moves to the closed side, the other side moves to the open side. The rotary dampers 12 and 13 are attached respectively.

Reference numeral 14 is a partition plate for contacting the damper 12, which is interposed in the lower bottom communication space of both kettles 1 and 2, and 15 and 16 are a pressure chamber and a current plate provided below the burner in each can. , 17 is a water supply pipe, and 18 is a water heater hood with an exhaust stack. Further, 25 and 26 are a wash basin and a hot water faucet, and 27 and 28 are a hot water faucet and a shower provided in the bathroom.

Next, regarding the operation of the water heater according to the present invention, the rotation of the dampers 12 and 13 for each of the four combinations (a) to (d) of the usage states of the water heaters 1 and 2 as shown in Table 1. The position will be described with reference to FIGS. 2 to 5.

As shown in FIG. 1, the pair of upper and lower dampers 12 and 13 incorporated in the water heater shown in this embodiment each function as a damper with an included angle of about 90 ° around the damper rotation axis. It has a shape in which two plate pieces are planted, and both plate pieces are configured to open and close each half of the openings of the air supply port 9 and the exhaust port 10.

Now, as shown in (a) of Table 1, the burner 3 of the water heating can 1 is used in the fully opened state, and the burner 4 of the water heating can 2 is also used in the fully open and highly combusted state. , In the case of full combustion, both the air supply damper 12 and the exhaust damper 13 face upwards (approx. 90 ° sandwiching) so that one half of each opening 9, 10 has an equal opening area. The direction of the bisector of the corner is the upward direction) and the downward direction (see FIG. 2).

Next, when the burner 3 is in the state of full combustion and the burner 4 is in the state of weak combustion (B), the damper 12 is required to respond to the fact that the fuel gas supply amount to the burner 4 is less than the supply amount to the burner 3. Since it is rotated somewhat to the right in the figure (see FIG. 3), the opening of the air supply port 9 on the burner 4 side is narrowed, and conversely, the opening degree on the burner 3 side is increased and fuel is fed to both burners. ~ The air supply ratio is reasonable due to the function of the damper 12,
And it is kept at a uniform value. On the other hand, the exhaust port damper 13 moves in the opposite direction to the air supply port damper 12 and rotates in the direction of narrowing the opening degree on the burner 3 side, but the increase in the supply amount and the narrowing down of the exhaust port are synergistic. By virtue of the effect, the combustion region above the burner 3 is provided with a favorable turbulent flow of combustion gas and air for improved combustion efficiency.

Under the condition of (c) where the burner 3 is stopped and the burner 4 is strongly burned (see FIG. 4), both dampers 12 and 13 move in the opposite directions to the above (b), The amount of air supplied to the burner 3 is significantly reduced, and the amount of air supplied to the burner 4 is increased.

When the burner 3 is stopped and the burner 4 is slightly burned (d) (see FIG. 5), the air supply port damper 12 narrows the opening on the burner 4 side and the burner of the exhaust port damper 13 is used. It takes the same position as the above-mentioned (b) as shown in FIG. 3 for increasing the opening degree on the 4th side.

Such two burners 3, 4 and two dampers 1
Summarizing the interlocking relation between 2 and 13, when the fuel supply to the burner increases, the opening degree of the air supply port of this burner increases while the exhaust port is throttled and the fuel supply decreases,
The damper will rotate so as to bring about the opposite state.

To adjust the amount of fuel supplied to each of the burners 3 and 4, use a hot water temperature adjusting knob or a proportional solenoid valve, similar to an ordinary gas combustion appliance, and rotate these knobs or a proportional solenoid valve. The change of the electric signal for control of both dampers 12 and 13 mechanically or through the action of a servomotor etc.
Both burners 3,
It is possible to automatically interlock each usage state of No. 4 and the rotational positions of the air supply port damper 12 and the exhaust port damper 13 with a specific relationship.

The shapes of the dampers 12 and 13 may be changed appropriately according to the arrangement and shape of the air supply port 9 and the exhaust port 10.

[Brief description of drawings]

FIG. 1 is a sketch drawing including a schematic cross-sectional view of a water heater showing a situation where the forced air supply type two-can water heater of the present invention is installed in a building in order to serve both as a hot water supply to a bathtub and a washbasin. And the second
Fig. 3, Fig. 4, Fig. 5 and Fig. 5 show combinations (a), (b), and (b) of respective usage conditions of the water heating can shown in Table 1.
It is the figure which drew the rotation position of the damper about (c) and (d). In the figure, 1, 2 ... Kettle (can), 3, 4 ... Burner,
5, 6 ... Heat exchanger, 9 ... Air supply port (supply port), 10
...... Exhaust port, 11 …… Constant speed rotating fan (fan), 12, 13
...... Damper, A ... Water heater (forced air supply type two-can water heater)

Claims (1)

(57) [Claims] 1. A forced-air type two-can type water heater in which an air supply port and a combustion gas exhaust port by a fan are shared, and a burner and a heat exchanger are arranged respectively. For each exhaust port, install a damper with a shape that moves the opening area in half so that one side of the opening moves to the closed side and the other side moves to the open side. Indicates that each damper is neutral, and the gas supply amount to each burner is different and each burner is in a different combustion state, the damper at the supply port has a small gas supply and the combustion air supply opening of the can on the burner side is weak. A forced supply type two-can type boiling water heater, characterized in that the damper of the exhaust port is rotated so as to narrow the exhaust port of the can on the burner side where a large amount of gas is supplied and strong combustion occurs. vessel.