JP2522906B2 - Forced air supply two-can type water heater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced supply type two can type gas hot water with a fan, which has two kettles for different purposes such as hot water supply to a bathtub and hot water supply to a shower. Regarding the heater.

[0002]

2. Description of the Related Art A gas water heater of a type in which two kettles, which are provided below and above a kettle and share an intake passage and an exhaust passage, are combined so that the air supply passage is divided into two. Techniques have already been developed for providing a damper for closing the air supply port to one of the combustion pausing cans.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When the two cans were operated with different hot water supply capacities depending on the respective usage conditions, it was extremely difficult to work the heating burners of these two cans together with the highest combustion efficiency.

An object of the present invention is to provide a forced air supply type two-can type water heater capable of burning the burner of one can even when the burner combustion of the other can is stopped.

[0005]

In order to solve the above-mentioned problems, the present invention shares an air supply port and a combustion gas exhaust port by a fan, and arranges a burner and a heat exchanger in each. In the forced air supply type two-can water heater, each of the supply port and the exhaust port moves to the side where one side of the opening is closed so as to divide the opening area into two, and the other side is opened. If a damper having a moving shape is attached, the gas supply to one of the cans is cut off and the burner combustion is stopped, and the other can is supplied with a large amount of gas and the burner is strongly combusted. The damper of the supply port is rotated so that the supply opening of one can is narrowed, and the damper of the exhaust port is rotated so that the exhaust opening of one can is expanded. Burner combustion has stopped and the other When a small amount of gas is supplied and the burner is burning weakly, the damper at the supply port narrows the supply opening of the other can, and the damper at the exhaust port narrows the exhaust opening of one can. As described above, a configuration of rotating each is adopted.

[0006]

Since the burner combustion of one can is stopped, it is not necessary to supply air, so the air supply opening to one can is narrowed. However, since the air supply opening of the other can expands, the exhaust opening of the other can is narrowed to prevent the amount of air supplied to the other can side from becoming excessive.

Since the burner of the other can burns weakly,
The air supply opening to the other can is narrowed to reduce the air supply to the other can. However, since the air supply opening to one can is widened, the exhaust opening of one can is narrowed so that the amount of air passing through one can is not increased.

Therefore, in the forced air supply type two-can water heater, even if the burner combustion of one can is stopped, the other can can be burned.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The forced air supply type two can type water heater of the present invention will be specifically described below 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 in which the water heater of the present invention is installed in a building so as to be used for supplying hot water to a bathtub and a washbasin, and A is 2 A water heater having a combined structure of two kettles 1 and 2, B is a kettle 1 and two water circulation pipes 2.
A bathtub connected by 1 and 22; 24, a pump for forced circulation; C, a hot water tap group in a bathroom and a bathroom, which is connected by a kettle 2 and a hot water supply pipe D.

Each of the kettles 1 and 2 has a combustion tube 1
Assemble burners 3 and 4 in the lower part of 9, 20 and heat exchangers 5 and 6 in the upper part, and water jackets 7 and 8 formed by spirally winding water pipes on the outside of the combustion cylinder. And a supply port 9 for pressurizing air generated by a constant speed rotary fan 11 is provided at the lower bottom.
Further, an exhaust port 10 for combustion gas is provided at the top end portion so as to be shared by these two kettles 1, 2.

The pressurizing air supply port 9 and the exhaust port 10 divide 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 each having a shape are attached.

Reference numeral 14 denotes a partition plate for abutting the damper 12, which is interposed in the communication space of the lower bottom portions of both the kettles 1, 2.
Reference numeral 16 is 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 pipe. Further, 25 and 26 are a washbasin 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 dampers 12 and 13 for each of the four combinations (a) to (d) of the usage conditions of the water heaters 1 and 2 as shown in Table 1. The description will be made with reference to FIGS.

Table 1: Examples of usage of kettles 1 and 2

[Table 1]

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 have a wrap angle of about 90 ° around the damper rotation axis. It has a shape in which two plate pieces that function as an element are planted, and both plate pieces have an air supply port 9 and an exhaust port 10.
Is configured to open and close each half of the opening.

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 case of full combustion, air supply port damper 1
2 and the exhaust port damper 13 have both openings 9, 10 respectively.
One half is directed straight upward (the direction of the bisector of the included angle of about 90 ° is straight upward) and the straight 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 has determined that the fuel gas supply amount to the burner 4 is smaller than the fuel gas supply amount to the burner 3. In order to correspond to the above, the opening on the burner 4 side of the air supply port 9 is narrowed, and conversely the opening degree on the burner 3 side is increased and both of these are increased. The fuel-air supply ratio to the burner is kept at a reasonable and uniform value by the action of the damper 12. On the other hand, the exhaust port damper 13 moves in the opposite direction to the air supply port damper 12,
Although it rotates in the direction of narrowing the opening degree on the burner 3 side, due to the synergistic effect of the increase of the air supply amount and the narrowing of the exhaust port, the combustion region above the burner 3 is improved in combustion efficiency. Highly favorable combustion gas and air turbulence conditions result.

When the burner 3 is stopped and the burner 4 is strongly burned (C) (see FIG. 4), both dampers 12,
13 moves in the opposite direction to the case of (b) above, the air supply amount to the burner 3 is significantly reduced, and the burner 4
The amount of air supplied to 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 exhaust port damper 13 is used. In the same position as the above-mentioned (b) as shown in FIG. 3 for increasing the opening degree on the burner 4 side.

To summarize the interlocking relationship between the two burners 3 and 4 and the two dampers 12 and 13, when the fuel supply to the burner increases, the opening degree of the air supply port of the burner is increased. , The exhaust port is throttled while the fuel supply is reduced, and the damper rotates so as to bring about the opposite condition.

In order to adjust the amount of fuel supplied to each of the burners 3 and 4, a knob for adjusting the temperature of the hot water or a proportional solenoid valve is used in the same manner as an ordinary gas combustion appliance, and the rotary movement or the turning of these knobs is used. By transmitting the change in the control electric signal of the proportional solenoid valve to the rotary shafts of both dampers 12 and 13 mechanically or through the action of a servomotor or the like, the respective operating states of both burners 3 and 4 can be obtained. Air supply port damper 12
It is possible to automatically interlock with the rotation position of the exhaust port damper 13 with a specific relationship.

The shapes of the dampers 12 and 13 may be appropriately changed 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 including a schematic cross-sectional view of a water heater showing a situation in which 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. Is.

FIG. 2 is a cross-sectional view illustrating a rotating position of the damper in the state (a) of the water heating can shown in Table 1.

FIG. 3 is a cross-sectional view illustrating the rotational position of the damper in the (b) state of the water heating can shown in Table 1.

FIG. 4 is a cross-sectional view illustrating the rotational position of the damper in the (c) state of the water heating can shown in Table 1.

FIG. 5 is a cross-sectional view illustrating the rotating position of the damper in the (d) state of the water heating can shown in Table 1.

[Explanation of symbols]

 1, 2 Hot water can (can) 3, 4 Burner 5, 6 Heat exchanger 9 Air supply port (supply port) 10 Exhaust port 11 Constant speed rotary fan (fan) 12, 13 Damper A Water heater (forced air supply type) Two-can type water heater)

Claims (1)

(57) [Claims] 1. A forced air supply type two-can water heater in which an air supply port by a fan and an exhaust port for combustion gas are shared, and a burner and a heat exchanger are respectively arranged in the supply port. Each of the exhaust port and the exhaust port is equipped 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 parts, the other side moves to the opened side, and the one can supplies gas. When the burner combustion is stopped due to disconnection of the burner, and the other can is supplied with a large amount of gas and the burner is burning strongly, the damper at the supply port reduces the air supply opening of one can. , The damper of the exhaust port is rotated so that the exhaust opening of one can widens, the gas supply to one can is cut off and the burner combustion is stopped, and the other can supplies a small amount of gas. Is done and the burner is burning weakly In this case, the damper of the supply port is rotated so that the air supply opening of the other can is narrowed, and the damper of the exhaust port is rotated so that the exhaust opening of the one can is narrowed. Two-can type water heater.