JP2000329338A - Hot-water supplier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the movement of an instrument as well as the extension and the change of exhausting direction after installation and maintain excellent combustion condition at all times by a method wherein a means for controlling the air volume of a fan without changing the number of rotation of the fan is provided on the air supplying and discharging route of a hot-water supplier. SOLUTION: Feed water flows from a feed water circuit 1 through a water amount sensor 2 and absorbs heat in a heat exchanger 3, then, is discharged out of a hot-water discharging passage 4 through a hot-water discharge sensor 5 and a water amount control valve 6. When a signal is inputted into the water amount sensor 2, fuel is supplied by a gas proportional valve 18 to start the combustion in a burner 7 and the gas proportional valve 18 controls the amount of gas supplied into the burner 7 so as to achieve a temperature set in a discharged hot-water temperature setting means 20, At the same time, a fan 8 supplies air for combustion and is turned at a preset number of rotation to retain the optimum combustion condition. In this case, the degree of opening of a variable air suction damper 9, capable of adjusting the air volume of suction unit of the fan 8, is specified at a value preset in accordance with the volume of exhaust gas whereby the air volume of the fan 8 can be set so as to obtain the optimum combustion condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater which always ensures a good combustion state even in various exhaust modes.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram of a conventional water heater.

[0003] Water passes from a water supply circuit 1 through a water amount detecting section 2 and absorbs heat by a heat exchanger 3 to become hot water, thereby forming hot water.
The hot water is discharged through the hot water temperature detecting section 5 and the water amount control means 6.

[0004] When a water amount signal is input to the water amount detection unit 2, fuel is supplied by the fuel control means 18, the burner 7 starts combustion, and the fuel control is performed so that the set temperature set by the hot water temperature setting means 20 is reached. Means 18 controls the amount of fuel supplied to burner 7. At the same time, the blower 8 starts supplying combustion air, and rotates at a preset rotation speed.

However, depending on the installation space and the installation location, it is often necessary to change the direction of the exhaust or extend the exhaust of the water heater. In the case where the rotation speed of the blower is constant, when the exhaust is suppressed depending on the exhaust mode, the air volume is significantly reduced, and the air may be out of the optimal combustion range. Therefore, the setting of the number of revolutions of the blower was changed according to the exhaust mode of the water heater.

[0006]

However, with the above-described configuration, it has been impossible to relocate the equipment, extend the exhaust after the installation, or change the exhaust direction.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to relocate and extend an exhaust gas after installation and to change the direction of exhaust gas, and to always ensure a good combustion state.

[0008]

The water heater according to the present invention is provided with air volume control means for controlling the air volume of the blower on the air supply / exhaust passage of the water heater without changing the air volume of the air blower. is there.

According to the present invention, the air volume can be changed without changing the set rotation speed of the blower.
Without changing the basic configuration of the water heater, it is possible to always ensure an optimal combustion state for various exhaust modes.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a burner, a heat exchanger for heating feed water to hot water with the burner, and an incoming water temperature detecting unit provided on the feed water passage for detecting feed water temperature. A water amount detection unit that detects a supply water flow rate, a tap water temperature detection unit that is provided on the tap water path and detects a hot water temperature, a water amount control unit that controls the tap water flow rate, and a fuel control unit that controls the fuel supplied to the burner. A blower for supplying combustion air to the burner, a rotation speed detection unit for detecting the rotation speed of the blower, and an air flow control unit attached to an intake unit of the blower for controlling the air flow of the blower.

[0011] Then, even if the exhaust mode of the water heater is remarkably changed and the rotation speed of the blower does not reach the rotation speed necessary for securing an optimal combustion state, the air flow rate of the blower is controlled by the air flow control means. Can be controlled, so that an optimum combustion state can always be ensured.

According to a second aspect of the present invention, air volume control means for controlling the air volume of the blower is attached to an exhaust portion of the blower.

According to a third aspect of the present invention, an air volume control means for controlling the air volume of the blower is mounted on a combustion gas exhaust path.

According to a fourth aspect of the present invention, there is provided an air flow detecting section for detecting an air flow of a blower, and a driving means for controlling the air flow controlling means based on a signal from the air flow detecting section. It is.

According to a fifth aspect of the present invention, there is provided a voltage detector for detecting a drive voltage of a blower, and a current detector for detecting a drive current. And a driving means for controlling the air volume control means.

[0016] Even if the exhaust form of the water heater is remarkably changed and the rotation speed of the blower is not the rotation speed necessary to secure an optimal combustion state, the air flow rate of the blower is controlled by the air flow control means. Can be controlled, so that an optimum combustion state can always be ensured.

[0017]

An embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of Embodiment 1 of the present invention.

The water passes through the water sensor 2 from the water supply circuit 1, absorbs heat by the heat exchanger 3, becomes hot water, and becomes hot water.
The water is discharged through the hot water thermistor 5 and the water amount control valve 6.

When a water signal is input to the water sensor 2, fuel is supplied by the gas proportional valve 18, the burner 7 starts burning, and the gas proportional valve is set to the set temperature set by the tapping temperature setting means 20. Reference numeral 18 controls the amount of gas supplied to the burner 7. At the same time, the blower 8 starts supplying the combustion air, rotates at a preset number of revolutions, and the water heater can maintain an optimal combustion state.

FIG. 2 is a characteristic diagram showing a combustion state of the water heater. The optimum combustion state of the burner 7 is as shown in FIG.
If the amount of gas from the blower 8 is increased while the amount of gas is kept constant, the flame starts to lift and becomes unable to hold the flame. Conversely, when the air volume of the blower 8 is reduced, an incomplete combustion state occurs.

Here, if it is necessary to significantly extend the exhaust gas due to the installation state of the water heater, the actual air volume is significantly reduced due to the exhaust resistance. In such a case, the opening of the variable intake damper 9 that is attached to the intake section of the blower 8 and that can adjust the air volume can be opened to a preset opening in accordance with the length of the exhaust gas. The air volume can be set to the optimum combustion state. Conversely, even when it becomes necessary to shorten the exhaust of the water heater in the exhaust extended state, the air volume of the blower 8 can be set to the optimal combustion state by closing the opening of the intake damper 9.

(Embodiment 2) FIG. 3 is a block diagram of Embodiment 2 of the present invention. 1 is different from FIG. 1 only in the position of the air volume adjusting means for adjusting the air volume.

Here, if it becomes necessary to significantly extend the exhaust gas depending on the installation state of the water heater, the actual air volume is significantly reduced due to the exhaust resistance. In such a case, the opening of the variable projection damper 10 attached to the exhaust unit of the blower 8 and capable of adjusting the air volume can be opened to a preset opening in accordance with the length of the exhaust air.
Can be set to the optimum combustion state. vice versa,
Even when it becomes necessary to shorten the exhaust of the water heater in the exhaust extension state, by closing the opening of the projecting portion damper 10,
The air volume of the blower 8 can be set to an optimal combustion state.

(Embodiment 3) FIG. 4 is a block diagram of Embodiment 3 of the present invention. 1 is different from FIG. 1 only in the position of the air volume adjusting means for adjusting the air volume.

Here, if it becomes necessary to significantly extend the exhaust air due to the installation state of the water heater, the actual air volume is significantly reduced due to the exhaust resistance. In such a case, by opening the opening of the exhaust damper 11 which is mounted on the exhaust path of the combustion gas and can adjust the air flow to a preset opening in accordance with the length of the exhaust, the air flow of the blower 8 is reduced. The optimum combustion state can be set. Conversely, even when it becomes necessary to shorten the exhaust of the water heater in the exhaust extended state, by closing the opening of the exhaust damper 11, the air volume of the blower 8 can be set to the optimal combustion state.

(Embodiment 4) FIG. 5 is a block diagram of Embodiment 4 of the present invention.

Here, when it becomes necessary to significantly extend the exhaust air due to the installation state of the water heater, the air volume sensor 12 detects a decrease in the air volume based on the exhaust resistance. In such a case, the driving means 1 for controlling the opening degree of the exhaust damper 11
Reference numeral 4 designates an intake section or an exhaust section of the blower 8 or an exhaust path of combustion gas, which adjusts an opening degree of an exhaust damper 11 capable of adjusting a flow rate, and sets an optimal combustion in which a flow rate of the blower 8 is preset. Can be set to state.

(Embodiment 5) FIG. 6 is a block diagram of a fifth embodiment of the present invention.

The air volume of the blower 8 is the work volume of the blower 8 and is represented by the following equation (1).

(Blower work amount) = (Blower drive voltage) * (Blower drive current) (1) Here, if it is necessary to significantly extend the exhaust due to the installation state of the water heater, Since the actual air volume decreases due to the exhaust resistance, the work amount calculating means 13 calculates the work amount of the blower 8 based on the equation (1) and detects a decrease in the air volume. In such a case, the driving means 14 for controlling the opening degree of the exhaust damper 11 is mounted on the intake section or the exhaust section of the blower 8 or on the exhaust path of the combustion gas, and the opening degree of the exhaust damper 11 capable of adjusting the air flow rate. Can be adjusted to set the work of the blower to the optimum combustion state.

[0032]

As is apparent from the above description, the water heater of the present invention has the following effects.

Since the air volume can be changed without changing the set number of revolutions of the blower, it is possible to always maintain an optimal combustion state for various exhaust modes without changing the basic configuration of the water heater. Can be done. Therefore, it is possible to cope with the transfer, the extension of the exhaust after the installation, and the change of the exhaust direction without any problem.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a water heater according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing an optimum combustion range of a burner of the water heater.

FIG. 3 is a configuration diagram of a water heater according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a water heater according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a water heater according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a water heater according to a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional water heater.

[Explanation of symbols]

 2 Water flow sensor 9 Intake damper 10 Projection damper 11 Exhaust damper 12 Air flow sensor 13 Work amount calculation means 14 Damper opening degree control means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor ▲ Yoshi ▼ 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 3K003 JA05 JA06 KA05 KB02 LA00 LA06 NA04 3L034 EA00

Claims (5)

[Claims] 1. A burner, a heat exchanger for heating supply water to hot water by the burner, an input water temperature detection unit provided on the water supply passage for detecting supply water temperature, a water amount detection unit for detecting supply water flow rate, and A tap water temperature detection unit provided in the water supply temperature detection unit that controls a tap water flow rate, a fuel control unit that controls fuel supplied to the burner, and a blower that supplies combustion air to the burner. A water heater comprising: a rotation speed detection unit for detecting a rotation speed of the blower; and an air flow control unit attached to an air intake unit of the blower for controlling the air flow. 2. A burner, a heat exchanger for heating feed water to hot water by the burner, an incoming water temperature detecting unit provided on the feed water passage for detecting the feed water temperature, a water flow detecting unit for detecting the flow rate of the supplied water, A tap water temperature detection unit provided in the water supply temperature detection unit that controls a tap water flow rate, a fuel control unit that controls fuel supplied to the burner, and a blower that supplies combustion air to the burner. A water heater comprising: a rotation speed detection unit that detects a rotation speed of the blower; and a flow control unit attached to an exhaust unit of the blower to control a flow rate. 3. A burner, a heat exchanger for heating feed water to hot water by the burner, an incoming water temperature detecting section provided on the feed water path for detecting the feed water temperature, a water quantity detecting section for detecting the flow rate of the supplied water, A tap water temperature detection unit provided in the water supply temperature detection unit that controls a tap water flow rate, a fuel control unit that controls fuel supplied to the burner, and a blower that supplies combustion air to the burner. A water heater comprising: a rotation speed detecting unit for detecting a rotation speed of the blower; and a flow rate control means mounted on an exhaust path of combustion gas to control a flow rate of the blower. 4. The water heater according to claim 1, further comprising an air volume detection unit for detecting an air volume of the blower, and a driving unit for controlling an air volume control unit based on a signal from the air volume detection unit. 5. A voltage detection unit for detecting a drive voltage of a blower, and a current detection unit for detecting a drive current, wherein an air volume control unit is controlled based on signals from the voltage detection unit and the current detection unit. 4. The water heater according to claim 1, further comprising a driving means.