JPH0313702A - Burning apparatus - Google Patents

Abstract

PURPOSE:To reduce the power consumption in the stand-by mode so as to improve the economy by supplying power only to the respective evaporating heaters for certain predetermined burners among a plurality of burners in the stand-by mode in which hot water is not dispensed. CONSTITUTION:In the stand-by in which hot water is not dispensed, power is supplied only to the respective evaporating heaters for certain perdetermined burners, and power is not supplied to the rest of the burners. That is, in the stand-by mode in which hot water is not dispensed, only the evaporating cham ber 14A on the burner 3A side is preheated, and the evaporating chamber 14B on the burner 3B side is not preheated. Even in the 'save' operating mode, the hot water demand can be amply met. The 'save' operating mode is so selected. This way, the power consumption required for preheating the evaporat ing chamber 14B in the stand-by mode can be reduced, and the economy im proved, compared with the normal operating mode.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention heats fuel such as petroleum with a heater and vaporizes it, and provides hot water by giving heat from the combustion of the vaporized fuel to water. This relates to a water heater.

[Conventional technology]

Conventionally, kerosene is vaporized using a vaporizing heater, the vaporized kerosene is combusted using a burner, and the heat generated by this combustion is applied to the water from the water pipes using a heat exchanger to supply hot water. A water heater is used.

Such water heaters are generally configured so that the amount of kerosene burned is variable, and by controlling the amount of kerosene, it is possible to respond to the size of the hot water supply load, such as when supplying hot water to a bathtub or a washroom. The temperature of the hot water supplied is varied. Furthermore, in order to widen the variable range of the combustion amount, many devices are used that are equipped with a plurality of burners and one or more of the plurality of burners performs combustion.

(Problem B to be Solved by the Invention) In the above-described water heater, a vaporizing section for vaporizing kerosene is installed in order to immediately start dispensing hot water when the hot water supply light switch is opened. Always keep the specified temperature (200~3
It must be preheated to 00°C. Therefore, it is necessary to keep the vaporization heater provided in the vaporization section energized at all times. For example, in a case where a water heater like the one described above is used all day long in the same manner as a conventional hot water storage type water heater, the vaporizing heater will be energized all day long, and in such a case, The power consumption of this vaporization heater reaches several times the power consumption during combustion of kerosene, and there is a problem that it is extremely uneconomical.

An object of the present invention is to solve the above-mentioned technical problems and to provide a water heater with significantly reduced power consumption and thus improved economic efficiency.

[Means to solve the problem]

In the water heater of claim (1), in a standby state where hot water is not supplied, only the vaporizing heaters of a predetermined part of the burners are energized, and the vaporizing heaters of the remaining burners are not energized. This is what I did.

The hot water supply apparatus according to claim (2) is characterized in that the vaporizing heaters of all the burners are energized at the same time as the hot water supply starts.

[Effect]

According to the water heater of claim (1), in the standby state where hot water is not supplied, only the vaporizing heaters of some of the burners included in the water heater are energized, so that the standby state is not interrupted. Power consumption in the state is reduced.

According to the water heater of claim (2), when hot water starts being supplied, the vaporizing heaters of all the burners included in the water heater are energized to preheat the vaporizing chambers of the burners that have not been preheated in the standby state. be exposed.

Therefore, after this preheating is completed, combustion can be performed in all burners. In other words, when the amount of hot water to be supplied is small or the temperature of the hot water to be supplied is relatively low, a sufficient hot water supply function can be achieved by burning only with the burner that is preheating in the standby state. Furthermore, even when the hot water supply load is large, after the preheating of the vaporizing chambers of the burners that are not preheated in the standby state is completed, combustion can be performed in all the burners, and sufficient hot water can be supplied.

〔Example〕

FIG. 1 is a conceptual diagram showing the basic configuration of a water heater according to an embodiment of the present invention. This water heater supplies kerosene, which is a liquid fuel stored in a sub-tank 1, to burners 3A and 3, respectively, using frequency-controlled oil pumps 2A and 2B, for example.
B, and the vaporization chambers 4A, 4B of these burners 3A, 3B.
The supplied kerosene is vaporized, the vaporized kerosene is combusted in burner heads 5A and 5B, and the heat generated by this combustion is given to water from water supply pipe 7 in heat exchanger 6. Hot water from the heat exchanger 6 is supplied for use via a hot water outlet pipe 8 from a drain 9 installed in a bathroom, washroom, or the like.

When the bell 9 is opened, this is detected by the flow sensor 10 provided in the water supply pipe 7 and in response the ignition device 11
is the ignition discharge electrode 12 provided near the burner head 5A.
produces a spark discharge.

This ignites burner 3A, and the flame of burner 3A ignites burner 3B.

The kerosene supplied to the vaporization chamber 4A by the oil pump 2A is
The vaporization chamber 4A is created using centrifugal force by the rotor motor 13A.
dispersed within and vaporized. This vaporization chamber 4A is preheated by a sheathed heater 14A, which is a vaporization heater.
The vaporization of the dispersed kerosene is aided. A thermistor 15A detects the temperature of the preheating chamber 4A in order to keep the temperature of the preheating chamber 4A constant. The configuration regarding the burner 3B is similar to the configuration regarding the burner 3A, and corresponding parts are shown with the same numerals and a suffix B.

In addition, 16 is a direct current fan motor for blowing air for supplying combustion air to the burners 3A and 3B, and 17 is a hot water outlet pipe 8.
This is a thermistor to monitor the temperature of the hot water.

A remote controller 2 is installed outside the main body of the water heater, which is used to select the operating mode of the water heater.
0 (hereinafter referred to as "remote controller 20"). This remote control 20 is placed in a kitchen, bathroom, washroom, etc., which is separate from the main body of the device, for example, and is used to adjust the temperature of hot water from the hot water outlet pipe 8 and to operate the device such as starting/stopping it. It is for. This remote control 20
The configuration is shown in FIG.

The water heater is started/stopped by operating an operation switch 21, and an operation lamp 22 lights up during operation. Then, shortly after the bell 9 is opened, combustion starts, and the combustion lamp 23 is turned on. The temperature of the hot water from the hot water tap 8 can be set by operating a temperature switch 24, and the set temperature is displayed on a display unit 25, which includes, for example, a plurality of light emitting diodes. The water heater of this embodiment has a save operation mode in which preheating of the vaporization chamber 4B of the burner 3B is not performed in a standby state where no hot water is being supplied;
Each vaporization chamber 4A, 4 in both burners 3A, 3B at all times
The remote control 20 includes a save operation switch 26 for selecting between the save operation mode and the normal operation mode. is provided, and a save operation lamp 27 is lit during operation in the save operation mode.

(i) Operation in normal operation mode When the save operation switch 26 is set so that the save operation lamp 27 does not light up, the water heater operates in the normal operation mode. That is, when the power is turned on by operating the operation switch 21, energization of the sheathed heaters 14A and 14B of the vaporization chambers 4A and 4B in the burners 3A and 3B is started. After about 3 minutes, vaporization chamber 4A,
The temperature at 4B reaches approximately 250"C, which causes thermistor 15A to reach a temperature of about 250"C.

When detected by 15B, sheathed heater 14A.

Power supply to 14B is stopped. After this, the vaporization chamber 4A.

When the temperature of the sheath heater 4B falls to about 240°C, the power supply to the sheathed heaters 14A and 14B is restarted. By repeating such operations, the temperature of the vaporizing chambers 4A, 4B is kept constant, so that when kerosene is dispersed into the vaporizing chambers 4A, 4B by the rotor motors 13A, 13B, this kerosene is easily vaporized. .

When the bell 9 is opened in this state, the flow sensor 10 detects this, and in response to this detection output, the rotor motors 13A, 23B and the direct current fan motor 16 are driven. Drive of pumps 2A and 2B,
Then, the burner 3 is ignited by the ignition device 11,
Furthermore, burner 3B is ignited by the flame. After this, a calculation means (not shown) calculates the required combustion amount based on the temperature of the hot water in the hot water tap 8 detected by the thermistor 17 and the temperature set by the temperature switch 24 of the remote controller 20, and the calculation result is Oil pump 2A, 2 corresponding to
The operating frequency of B and the rotational speed of rotor motors 13A and 13B are controlled 22I.

In this embodiment, each of the burners 3A and 3B can vary the amount of heat generated, for example in the range of 5000 to 15000 kcal/H. And the amount of hot water (
It is detected by the flow rate sensor 10. 15,000 kca! ! , /H or more is required, both oil pumps 2A and 2B are driven to obtain a maximum capacity of 30,000 kcal/H. On the other hand, if the hot water supply load is small,
Combustion is performed only in burner 3A. In other words, this water heater uses 5,000 to 30,000 kca i! /! 1
The ability is variable within the range of .

Hot water is supplied in this way, and when the hot water supply is stopped by closing the collar 9, this is detected by the flow rate sensor 10 and the burner 3A is stopped.

Combustion of 3B is stopped. After this, sheathed heater 14A
, 14B is continued, and preheating of the vaporization chamber 4A4B is continued.

(ii) Operation in save operation mode In the remote control 20, operate the save operation switch 26 to turn on the save operation lamp 27, and when the save operation mode is selected, the operation switch 21
When the power is turned on by the operation, energization is started only to the sheathed heater 14A of the vaporization chamber 4A on the burner 3A side. That is, the sheathed heater 14B on the burner 3B side is not energized. The temperature in the vaporization chamber 4A reached approximately 250'C in about 3 minutes after the start of energization of the sheathed heater 14A, and the temperature in the vaporization chamber 4A was kept constant by intermittently energizing the sheathed heater 14A. It will be done.

When the collar 9 is opened from this state, the burner 3A is ignited in the same manner as described above. When the burner 3A is ignited, the sheathed heater 14B on the burner 3B side starts to be energized. As a result, the burner 3B becomes ready for ignition approximately 3 minutes after the ignition of the burner 3A. In this state, both burners 3A and 3B can be ignited when the amount of hot water dispensed is large or when the set temperature is high.

When the collar 9 is closed, this is detected by the flow rate sensor IO, and the energization to the sheathed heater 14B is stopped, and only the energization to the sheathed heater 14A is continued. In this way, only the vaporization chamber 4A is kept at a constant temperature (approximately 250° C.).

For example, when hot water is used in washrooms, kitchens, etc., the amount of hot water supplied is relatively small, and the hot water supply load is usually 15,000 kcal/H or less. Therefore, sufficient hot water can be supplied by burning only the burner 3A. On the other hand, when the hot water supply load ρ is large, such as when hot water is supplied to a bathtub or the like, the necessary amount of heat cannot be obtained by burning only the burner 3A, and therefore the burner 3B is also required to be burned.

In the save operation mode, when the burner 9 is first opened, only combustion is possible with the burner 3A, so when supplying hot water to a bathtub, etc., it is not possible to obtain a sufficient hot water temperature.
However, after about 3 minutes, the preheating of the vaporization chamber 4B is completed and the burner 3B is also ready for combustion, so that hot water at a sufficient temperature can be supplied from then on.

In this way, a sufficient temperature cannot be obtained immediately after starting hot water supply, but when supplying hot water to a bathtub, for example, the above-mentioned 3-minute delay in the rise in hot water temperature is rarely a problem in practice. easily guessed.

In this way, in the above-mentioned save operation mode, in the standby state where hot water is not being supplied, the vaporization chamber 14 on the burner 3A side
Only A is preheated, and the vaporization chamber 14B on the burner 3B side is not preheated.Moreover, even in the save operation mode as described above, the demand for hot water supply can be fully satisfied.

In this way, if you select this save driving mode,
The vaporization chamber 14 in the standby state compared to the normal operation mode
According to the calculations made by the inventors, the device of this example can save the power required for preheating B.
Compared to normal operation mode, save operation mode is about 3
It is expected that power consumption will be reduced by about 5%, and it has been confirmed that the annual electricity bill will be approximately 20,000 yen in normal operation mode and approximately 13,000 yen in save operation mode.

(Effects of the Invention) As described above, according to the water heater of the present invention, in the standby state where hot water is not being supplied, only the vaporizing heaters of some of the burners included in the water heater are energized. As a result, power consumption in this standby state is reduced.Thereby, economical efficiency can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing the basic configuration of a water heater according to an embodiment of the present invention, and FIG. 2 is a front view of a remote controller 20. As shown in FIG. 3A, 3B... Burner, 4A, 4B... Vaporization chamber, 1
4A, 14B... Sheathed heater (vaporization heater) 3A
, 3B -- Burner 4A, 4B -- Richi chamber diagram

Claims (2)

[Claims] (1) In a water heater equipped with a plurality of burners having a vaporization chamber that vaporizes liquid fuel and a vaporization heater that preheats the vaporization chamber, in a standby state in which hot water is not supplied, A water heater characterized in that only the vaporizing heaters of some of the burners are energized. (2) The hot water supply apparatus according to claim (1), wherein the vaporizing heaters of all of the plurality of burners are energized at the same time as the hot water supply starts.