JP2807264B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] In the present invention, a fuel such as petroleum is heated and vaporized by a heater, and heat generated by combustion of the vaporized fuel is given to water to supply hot water. The present invention relates to a hot water supply device.

[Conventional technology]

Conventionally, kerosene is vaporized by a vaporization heater, the vaporized kerosene is burned by a burner, and heat generated by the combustion is given to water from a water pipe by a heat exchanger to supply hot water. A hot water supply device is used. Such a hot water supply device is generally configured such that the amount of kerosene combustion is variable, and by controlling the amount of combustion, it is possible to cope with a large or small amount of hot water supply load such as hot water supply to a bathtub or a washroom. The temperature of the hot water to be supplied is changed. Further, in order to increase the variable width of the combustion amount, there are many burners provided with a plurality of burners, wherein one or more of the burners perform combustion.

[Problems to be solved by the invention]

In the hot water supply apparatus described above, when the hot water supply destination is opened, the hot water supply is started immediately so that the vaporizing section for vaporizing the kerosene always has a predetermined temperature (200 to 300
° C). For this reason, it is necessary to always energize the vaporization heater provided in the vaporization section. For example, in a case where the above-described hot water supply device is used all day in the same manner as a conventional hot water supply type hot water supply device, the heater for vaporization will be energized all day,
In such a case, the power consumption of the vaporization heater is
The power consumption during the burning of kerosene is several times the power consumption, which is extremely uneconomical.

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

[Means for solving the problem]

The hot water supply apparatus of the present invention includes two independently provided burners, and in a standby state in which hot water is not supplied, preheats a predetermined one of the two burners to the vaporization chamber and performs the other burner. Save operation mode in which the preheating of the vaporization chamber is not performed, and the normal operation mode in which the vaporization chamber of the two burners is always preheated, and the save operation mode is selected. In this case, when the hot water supply is started, the heater for vaporization of the other burner which is not preheated is also energized to start the preheating of the vaporization chamber.

[Action]

According to the hot water supply apparatus of the present invention, the save operation mode and the normal operation mode can be arbitrarily selected according to the use situation and the hot water supply load, so that the convenience is good, and when the save operation mode is selected, the standby state in which hot water is not supplied is provided. In this case, only the vaporizing heater of one of the two burners is energized to preheat only the vaporizing chamber, so that the power consumption in the standby state is reduced.

When the hot water supply is started while the save operation mode is selected, the heater for vaporization of the other burner that is not preheated is also energized to start preheating the vaporization chamber. Therefore, after the completion of the preheating, combustion in all burners can be performed. That is,
When the amount of hot water to be supplied is small, or when the load of hot water is relatively low, such as when the temperature of hot water to be supplied is relatively low, a sufficient hot water supply function is achieved by burning only the burners that are preheated in the standby state. Can be achieved, and even when the hot water supply load is large, after the preheating of the vaporization chamber of the burner is not performed in the standby state, the combustion can be performed in all the burners, and the sufficient hot water is supplied without interruption. be able to.

〔Example〕

FIG. 1 is a schematic diagram showing a basic configuration of a hot water supply apparatus according to one embodiment of the present invention. This hot water supply device has a sub tank 1
Kerosene, which is a liquid fuel stored in the burner, is supplied to burners 3A, 3B by, for example, frequency control type oil pumps 2A, 2B, and the supplied kerosene is vaporized in the vaporization chambers 4A, 4B of the burners 3A, 3B. The vaporized kerosene is burned by the burner heads 5A and 5B, and the heat generated by the combustion is given to the water from the water supply pipe 7 in the heat exchanger 6. Heat exchanger 6
Hot water is supplied for use from a curran 9 provided in a bathroom, a washroom, or the like via a tapping pipe 8.

When the curran 9 is opened, this is detected by the flow rate sensor 10 provided in the water supply pipe 7, and in response, the ignition device 11 causes a spark discharge at the ignition discharge electrode 12 provided near the burner head 5A. . This ignites burner 3A,
The burner 3B is ignited by the flame of the burner 3A.

The kerosene supplied to the vaporization chamber 4A by the oil pump 2A is dispersed and vaporized in the vaporization chamber 4A by centrifugal force by the rotor motor 13A. The vaporizing chamber 4A is preheated in a sheath heater 14A, which is a vaporizing motor, and assists in vaporizing the dispersed kerosene. 15A is a thermistor, which is used to keep the temperature of the preheating chamber 4A constant.
Temperature is detected. Configuration of burner 3B is burner
The configuration is the same as that of 3A, and the corresponding parts are indicated by the same numerals with the suffix B added.

Reference numeral 16 denotes a blower DC fan motor for supplying combustion air to the burners 3A and 3B, and reference numeral 17 denotes a thermistor for monitoring the temperature of oil passing through the tapping pipe 8.

Outside the main unit of the water heater, there is a remote controller used for selecting an operation mode of the water heater.
20 (hereinafter referred to as “remote controller 20”).
This remote control 20 is, for example, a kitchen separated from the apparatus main body,
It is arranged in a bathroom or a washroom, etc., for adjusting the temperature of hot water from the tapping pipe 8 and for performing operations such as operation / stop of the apparatus. The structure of the remote controller 20 is shown in FIG.

The operation / stop of the water heater is performed by operating the operation switch 21, and the operation lamp 22 is turned on during operation. And
Shortly after Karan 9 was opened, combustion started,
The combustion lamp 23 lights up. The temperature of the hot water of the tapping pipe 8 can be set by operating the temperature switch 24, and the set temperature is, for example, a display unit composed of a plurality of light emitting diodes or the like.
Appears on 25. In the water heater of this embodiment, the burner 3B
Save mode in which the preheating of the vaporization chamber 4B is not performed in the standby state where hot water is not supplied, and the burners 3A and 3B are always
It is possible to select the operation in two types of operation modes, that is, the normal operation mode in which the pre-heating of each of the vaporization chambers 4A and 4B is performed in both of them, and the remote controller 20 includes the save operation mode and the normal operation mode. Save operation switch for selection
A save operation lamp 27 is turned on during operation in the save operation mode.

(I) Operation in the normal operation mode When the save operation switch 26 is in a state where the save operation lamp 27 is not lit, the water heater operates in the normal operation mode. That is, when the power is turned on by operating the operation switch 21, energization to the sheathed heaters 14A, 14B of the vaporization chambers 4A, 4B in the burners 3A, 3B is started.
After about three minutes, the temperatures of the vaporizing chambers 4A and 4B reach about 250 ° C. When this is detected by the thermistors 15A and 15B, the power supply to the sheathed heaters 14A and 14B is stopped. Thereafter, when the temperature of the vaporization chambers 4A, 4B decreases to about 240 ° C., the power supply to the sheathed heaters 14A, 14B is restarted. By repeating such an operation, the temperatures of the vaporization chambers 4A and 4B are kept constant, and therefore, the rotor motor 1
When the kerosene is dispersed by 3A and 13B, this kerosene is easily vaporized.

When the curran 9 is opened in such a state, the flow sensor 10 detects this, and the roller motors 13A and 13B and the DC fan motor 16 for blowing are driven in response to the detection output. Next, the drive of the oil pumps 2A and 2B and the ignition of the burner 3A by the ignition device 11 are performed, and the burner 3B is ignited by the flame. After this, thermistor 17
The required amount of combustion is calculated by a calculation means (not shown) based on the temperature of the hot water in the tapping pipe 8 detected by the temperature control and the temperature set by the temperature switch 24 of the remote controller 20. The operating frequencies of 2A and 2B and the rotation speed of rotor motors 13A and 13B are controlled.

In this embodiment, each of the burners 3A and 3B is, for example, 5
The amount of heat generated in the range of 000 to 15000 kcal / H can be changed. When the hot water supply amount (detected by the flow rate sensor 10) is large, or when the hot water supply load is high, such as when the set temperature is high, when the capacity of 15,000 kcal / H or more is required, the oil pumps 2A, 2B Both are driven to obtain a maximum capacity of 30,000 Kcal / H. Conversely, if the hot water load is small, burner 3A
Combustion only takes place. That is, in this water heater, the capacity is variable in the range of 5000 to 30000 Kcal / H.

When hot water is supplied in this way, and the hot water supply is stopped by closing the curran 9, this is detected by the flow rate sensor 10 and the combustion of the burners 3A and 3B is stopped.
After this, the power supply to the sheathed heaters 14A and 14B is continued, and the preheating of the vaporization chambers 4A and 4B is continued.

(Ii) Operation in Save Operation Mode When the save operation lamp 27 is turned on by operating the save operation switch 26 on the remote controller 20 and 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, power is not supplied to the sheathed heater 14B on the burner 3B side. About 3 minutes after the start of energization of the sheathed heater 14A, the temperature of the vaporization chamber 4A reaches about 250 ° C., and the energization of the sheathed heater 14A is performed intermittently, and the temperature in the vaporization chamber 4A is kept constant. .

When the curran 9 is opened from this state, the burner 3A is ignited in the same manner as described above. Then, with the ignition of the burner 3A, energization of the sheathed heater 14B on the burner 3B side is started. Thus, the burner 3B can be ignited about three minutes after the ignition of the burner 3A. In this state, when the amount of hot water is large or when the set temperature is high, both burners 3A and 3B can be ignited.

When the curran 9 is closed, this is detected by the flow rate sensor 10, and the energization to the sheathed heater 14B is stopped, and only the energization to the sheathed heater 14A is continued. Thus, only the vaporization chamber 4A is kept at a constant temperature (about 250 ° C.).

For example, when using hot water in a washroom or a kitchen, the amount of hot water is relatively small, and the hot water supply load is usually 15,000 Kcal / H or less. Therefore, hot water can be sufficiently supplied by burning only the burner 3A. On the other hand, in the case of a large hot water supply load such as hot water supply to a bathtub or the like, the required amount of heat cannot be obtained by burning only the burner 3A.
Combustion is also required.

In the save operation mode, only the burner 3A can burn at the beginning when the curran 9 is opened. Therefore, when supplying hot water to a bathtub or the like, a sufficient tapping temperature cannot be obtained.
However, after about 3 minutes, the preheating of the vaporization chamber 4B was completed,
Since the burner 3B is also ready for combustion, it is possible to supply hot water at a sufficient temperature thereafter. As described above, a sufficient temperature cannot be obtained immediately after the start of hot water supply, but it is easily presumed that, for example, in hot water supply to a bathtub or the like, the above-described delay in the rise in tap water temperature of about 3 minutes is practically no problem. Is done.

As described above, in the save operation mode, in the standby state where hot water is not supplied, the vaporization chamber 14A on the burner 3A side is used.
Only preheating is performed, and preheating of the vaporization chamber 14B on the burner 3B side is not performed. In addition, the demand for hot water supply can be sufficiently satisfied even in the save operation mode as described above.

Thus, if this save operation mode is selected, the vaporization chamber in the standby state is compared with the normal operation mode.
The power required for preheating 14B can be saved. According to the estimations of the present inventors, in the device of this embodiment, the power consumption is expected to be reduced by about 35% in the save operation mode compared to the normal operation mode, and the annual electricity bill is reduced. It has been confirmed that the cost is about 20,000 yen in the normal operation mode and about 13,000 yen in the save operation mode.

〔The invention's effect〕

As described above, according to the hot water supply apparatus of the present invention, the save operation mode and the normal operation mode can be arbitrarily selected in accordance with the use situation and the hot water supply load, so that the usability is good, and when the save operation mode is selected, the hot water supply is performed. In the standby state where the burner is not operated, only the vaporization heater of the burner of the two burners is energized and only the vaporization chamber is preheated, so that the power consumption in the standby state is reduced. Also, when the save operation mode is selected, when hot water supply is started, the heater for vaporization of the other burner that is not preheated is also energized to start preheating the vaporization chamber. Therefore, after the completion of the preheating, the other burner can also be burned, and when the hot water supply load is small, the other burner is not burned, and only the combustion of one burner is used. By burning the burner,
An appropriate amount of heat can be supplied according to the hot water supply load. Thereby, the economic efficiency can be remarkably improved and an easy-to-use water heater can be provided.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a basic configuration of a water heater according to one embodiment of the present invention, and FIG. 2 is a front view of a remote controller 20. 3A, 3B …… Burner, 4A, 4B …… Evaporation chamber, 14A, 14B …… Sheet heater (heater for vaporization)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23D 11/44

Claims (1)

(57) [Claims] 1. An oil pump for supplying a liquid fuel, a vaporization chamber for vaporizing the liquid fuel supplied by the oil pump, a vaporization heater for preheating the vaporization chamber, and a vaporization gas supplied from the vaporization chamber. And a heat exchanger for heating water by the burner, wherein two burners each having a burner head for burning water are provided side by side independently. And a save operation mode in which the predetermined one of the burners is preheated and the other burner is not preheated, and the preheating of the two burners is always performed. In addition to the normal operation mode, when the save operation mode is selected, when the hot water supply is started, the vaporization heater of the other burner that is not preheated is also used. A hot water supply apparatus characterized in that a current is supplied to start preheating of the vaporization chamber.