JP3473418B2 - Oil vaporized combustion device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil vaporization type combustion apparatus, and more particularly to reducing the electric heating cost used for a vaporizer during combustion and reliquefying the vaporized oil even under conditions where it is easy to reliquefy. The present invention relates to an oil vaporization type combustion device capable of preventing the above.

[0002]

2. Description of the Related Art In a conventional oil vaporization type combustion apparatus of this kind, oil is vaporized by a vaporizer into a gaseous state, and an appropriate amount of air supplied from a blower is supplied to the vaporized oil in the gaseous state. The structure is such that the mixture is mixed and the mixture is burned by a burner.

The vaporizer is provided with a diffusion blade, a vaporization heater, a vaporizer temperature sensor, and a burner, a mixing chamber, a mixing chamber heater and the like. The diffusion blade has a structure that can be rotated by a motor. Of these, the vaporization heater is a heater for vaporizing oil in the vaporizer,
For example, it has a capacity of about 700W. The mixing chamber heater is for keeping the temperature inside the mixing chamber under the vaporizer, and has a capacity of, for example, about 160 W.

In the oil vaporization type combustion apparatus having such a structure, when the operation switch is turned on, the vaporization heater is first turned on so that the vaporizer can quickly vaporize the oil during the actual combustion operation. Maintained at standby temperature as preheat. And when there is a burning command,
The oil supplied from the oil tank is scattered in the circumferential direction by the diffusion blades. Since the circumferential wall of the vaporizer is heated to a predetermined set temperature by the vaporization heater, the scattered oil collides with the wall and is vaporized to become a gas. This vaporized vaporized oil is mixed at a constant ratio with the air sent from the blower to the vaporizer side in the mixing chamber, and is introduced to the burner side as a mixture for combustion. The inside of the mixing chamber is kept warm by the above mixing chamber heater so that the mixture does not fall below the set temperature.

[0005]

However, in the above-mentioned conventional oil vaporization type combustion device, cold outside air may be blown into the carburetor side as mixing air from the blower during combustion. Even when such cold air is sent in, the set temperature is always set to a fairly high value in order to keep it at the specified set temperature. Therefore, the electric heating cost of the vaporization heater is extra by that amount, which saves power and electricity. It was not always desirable from the viewpoint of energy saving. Further, when the set temperature of the vaporizer is lowered to reduce the electric heating cost, when the cold outside air comes in, the vaporizer oil becomes liquefied due to insufficient capacity of the vaporizer. There has been a problem that a reliquefaction phenomenon is exhibited and white smoke is generated. Furthermore, even when environmental conditions such as low supply air temperature, ambient temperature or water temperature are severe, or when the number of hot water outlets is large, the set temperature of the carburetor has always been fixed. Since it was not variable, there was a problem that the reliquefaction phenomenon was particularly likely to occur as a result of not being able to immediately respond to the above environmental conditions and the like.

The present invention has been invented in view of the above-mentioned problems, and the function as a vaporizer can be sufficiently exhibited even if the electric heating cost for heating the vaporization heater is kept low, and the environmental conditions are satisfied. It is an object of the present invention to provide an oil vaporization type combustion device that can quickly respond to the above and does not cause reliquefaction of vaporized oil.

[0007]

In order to achieve the above object, an oil vaporization type combustion apparatus of the present invention vaporizes oil in a vaporizer and mixes the vaporized oil with air supplied from a blower. led to the burner Te, and an oil vaporizer combustion apparatus that is subjected to combustion, the carburetor setting temperature
As a degree, the standby temperature until the start of combustion
And the first set temperature and the second set temperature during the combustion operation.
And the standby temperature and the first setting.
The condition of the constant temperature and the second set temperature is the standby temperature <
First set temperature <second set temperature and start combustion
To preheat the carburetor to standby temperature up to
Controlled so that it is sent to the carburetor during combustion operation
When the air temperature is below the reference temperature and continues for a certain period of time
It is common to control the vaporizer to the second set temperature on the high temperature side.
In other cases, set the vaporizer to the first set temperature on the low temperature side.
The first feature is that a controller for controlling the frequency is provided . In addition to the first feature, the oil vaporization type combustion device of the present invention is provided with a controller for controlling the temperature of air sent to the vaporizer and its duration at predetermined time intervals during combustion operation. This is the second feature. In addition to the first or second characteristic, the oil vaporization type combustion device of the present invention selects the first set temperature on the low temperature side as the set temperature of the carburetor from the start of combustion until a certain time elapses. The third feature is that a controller for controlling vaporization is provided .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an oil vaporization type combustion apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of an oil vaporization type combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining a control operation of a vaporizer in the oil vaporization type combustion apparatus according to an embodiment of the present invention. It is a flowchart.

First, the overall structure of the oil vaporization type combustion device will be briefly described with reference to FIG. The combustion apparatus shown in the same figure introduces the heat exchanger of the bath reheating circuit and the heat exchanger of the hot water supply circuit into one heat exchange can body, so that one heat exchange can body heats the above two circuits. It illustrates a one-can two-circuit bathtub device that can be used also for exchange heating. The heat exchange can body 10 is provided with a carburetor 20 and a burner 24 at its lower part, and a blower 30 for supplying combustion air to the inside of the carburetor 20 and the burner 24 is provided outside the heat exchange can body 10. ing. Then, the heat exchange can body 10
For this, a hot water supply circuit 40 and a bath reheating circuit 50 are connected.

The vaporizer 20 is provided with a diffusion blade 21, a vaporization heater 22, and a vaporizer temperature sensor 23, and a mixing chamber 26 and a mixing chamber heater 27 are arranged below the vaporizer 20. The diffusion blade 21 can be rotated by a motor 28, and the motor 28 is provided with a rotation speed sensor 29.

The hot water supply circuit 40 includes a water inlet conduit 41 connected to a water supply facility, a heat exchange conduit 42, and a hot water outlet conduit 43, and the water inlet conduit 41 is provided with a water amount sensor 44. . Further, the bath reheating circuit 50 includes a return pipe line 51 for guiding bath water from the bathtub to the heat exchange can body 10 and a heat exchange pipe line 52.
And a return pipe line 53 that guides the bath water that has undergone heat exchange in the heat exchange can body 10 to the bathtub, and the return pipe line 51 is provided with a water amount switch 54.

The oil is stored in the oil sub-tank 60 by the pumping operation of the pumping pump 70 from an external oil tank (not shown), and the oil is pumped up from the oil sub-tank 60 by the constant flow rate pump 61 and injected through the oil supply pipe 62. At this time, since the diffusion blade 21 is rotated by the rotation of the motor 28, the injected oil is diffused in the centrifugal direction. The diffused oil collides with the inner wall around the vaporizer 20, but since the inner wall is in a state of being heated by the vaporization heater 22, it is vaporized and becomes a gas. On the other hand, air is supplied from the blower 30 to the carburetor 20 side, and the mixing chamber 26 is kept warm by the mixing chamber heater 27.
The vaporized oil and air are mixed inside the burner 24.
It is designed to be burned by being guided to.

When the operation switch of the oil vaporization type combustion device is turned on, the vaporizer 20 is provided around the vaporization heater 22 regardless of the combustion operation.
Is preheated to the standby temperature.
Further, during the combustion operation, two high and low temperature levels are prepared in advance as the set temperature of the carburetor 20. Then, during the combustion operation, the supply air temperature of the air sent to the carburetor 20 is detected by the supply air temperature sensor 31, and the detected temperature is equal to or lower than the reference temperature (eg, 18 ° C.) and continues for a fixed time (eg, 20 seconds). In this case, as the set temperature of the vaporizer 20, the second set temperature on the high temperature side (for example, 250
C) is selected, and in other cases, the first set temperature on the low temperature side (for example, 230) is set as the set temperature of the vaporizer 20.
C.) is variably controlled by the controller 80. Here, the reference temperature of the supply air temperature is 18 ° C., and the constant time when continuing for a constant time is 20 seconds, but it is not particularly limited, and an appropriate value is set in advance by experiments or the like.

The temperature of the carburetor 20 is preheated at a standby temperature (for example, 210 ° C.) until the combustion is started, and when the combustion is started, the combustion is started for a certain time (an appropriate time by an experiment or the like in advance). (For example, 5 minutes)
The first set temperature on the low temperature side (for example, 23
You may control so that vaporization may be performed at 0 degreeC.

Further, the controller 80 monitors the temperature of the air sent to the carburetor 20 by the supply air temperature sensor 31 at every predetermined time (X minutes) after a predetermined time (for example, 5 minutes) has elapsed from the start of combustion. .

In the above description, "combustion start" means a case where the water amount sensor 44 detects a minimum operating water amount (MOQ) or more when hot water is used, and a case where the water flow switch 54 is turned on when a bath is used. Further, at the standby temperature (210 ° C.) of the vaporizer 20, as a means for maintaining the standby temperature (210 ° C.), the vaporization heater 22 is turned off when the detected temperature exceeds the standby temperature by, for example, 5 ° C. (215 ° C.). Then, when the temperature drops below 5 ° C (205 ° C)
The vaporization heater 22 is turned on. Similarly, when the temperature exceeds the first set temperature (230 ° C.) by 5 ° C. (235 ° C.), the vaporization heater 22 is turned off, and when the temperature is lower than 5 ° C. (225 ° C.), the vaporization heater 22 is turned on. I have to. In this way, the vaporizer temperature is constantly detected by the vaporizer temperature sensor 23, and the vaporization heater 22 is turned on so as to maintain the preset temperature.
Off is repeated. Second set temperature (250 ° C)
As for the above, the carburetor temperature should be 5 ° C from 250 ° C.
When the temperature exceeds 5 ° C (255 ° C), the vaporization heater 22 is turned off, and when the temperature falls below 5 ° C (245 ° C), the vaporization heater 2
2 is turned on.

In the above description, the air supply temperature of the air supplied from the blower 30 to the carburetor 20 side is used as a standard as a determination factor when controlling the carburetor 20 to the second set temperature (250 ° C.). Other than this, there are atmospheric temperature and water temperature as the judgment factors that the vaporized oil is likely to be reliquefied, and the vaporizer can be controlled to the second set temperature by using these as a guide. Shall be determined by Similarly, the first set temperature is set to a relatively low temperature among the temperatures at which the oil can be stably vaporized under normal conditions by an experiment or the like in advance. The standby temperature is a preheating temperature of the carburetor 20 before starting the combustion operation, and a temperature at which the first set temperature can be quickly raised at the time when the combustion is started is previously obtained by an experiment or the like.

Next, a control example of the oil vaporization type combustion device will be described with reference to the flow chart shown in FIG.
Now, when the operation switch of this combustion device is turned on, the carburetor temperature is controlled to be the standby temperature (210 ° C.) (step S1). At this time, if the temperature of the vaporizer 20 is + 5 ° C. above the set temperature 210 ° C., the vaporization heater 2
2 is turned off, and the vaporization heater 22 is turned on if the temperature is -5 ° C higher than the first set temperature 210 ° C. Then, it is monitored whether or not the combustion command is on (step S2). Here, the combustion command means a case where the water amount sensor 44 detects a minimum operating water amount (MOQ) or more when hot water is used, and a case where the water flow switch 54 is turned on when a bath is used. Be started. If the combustion command is on (Yes in step S2), first, the carburetor temperature is set to the first set temperature (230
℃) is controlled. Then, in the present embodiment, the temperature of the carburetor 20 is kept at the first set temperature for a certain period of time (for example, 5 minutes) after the combustion command is turned on regardless of the presence or absence of the combustion operation (step S).
3). Then, when a certain time has elapsed (Yes in step S4), whether the air supply temperature detected by the air supply temperature sensor 31 is equal to or lower than the reference temperature (18 ° C.) and this state continues for a certain time (20 seconds). It is determined whether or not (step S5). If YES in step S5, the carburetor temperature is higher than the first set temperature by the second set temperature (2
The temperature is controlled to be 50 ° C. (step S6). In short, a higher set temperature (250 ° C.) is taken into consideration in consideration of cooling of the vaporizer with low temperature air. On the other hand, if NO in step S5, the carburetor temperature is the first
The temperature is controlled to reach the set temperature (230 ° C.) (step S7). Then, step S6 or step S
After seven, assuming that the combustion command is not turned off (No in step S8), every time a predetermined time (X minutes) elapses (yes in step S9), the process returns to step S5,
Thereafter, the same control as above is repeated. In addition, when the combustion command is turned off in step S8 (step S
8) returns to step S1 and the vaporizer 20 is controlled to the standby temperature.

As described above, according to the oil vaporization type combustion apparatus having the above-described structure, the temperature to be set in the vaporizer during the combustion operation is set in advance in two high and low stages, and the air sent to the vaporizer 20 is set. If the temperature is lower than the reference temperature and continues for a certain period of time, the second set temperature on the high temperature side (for example, 250 ° C.) is selected as the set temperature of the carburetor 20, and in other cases, the carburetor 20 is set. Since the control is performed so as to select the first set temperature on the low temperature side (for example, 230 ° C.) as the set temperature of, the temperature of the air sent to the carburetor 20 is equal to or higher than the reference temperature or equal to or lower than the reference temperature. When it does not continue for a certain period of time, the first set temperature on the low temperature side (for example, 230 ° C.) is selected as the set temperature of the carburetor, and as a result, the electric heating cost for the vaporization heater 22 for keeping the carburetor warm is kept low. Door can be. On the other hand, when the temperature of the air sent to the vaporizer 20 is equal to or lower than the reference temperature and continues for a certain period of time, the second preset temperature on the high temperature side (for example, 250 ° C.) is selected as the preset temperature of the vaporizer 20. result,
Even under adverse conditions, the reliquefaction phenomenon of vaporized oil can be avoided, and the problem of white smoke does not occur.

[0020]

According to the oil vaporization type combustion device of the first aspect of the present invention, the oil is vaporized by the vaporizer, and the vaporized oil is supplied from the blower. It led to the burner a mixture of air and an oil vaporizer combustion apparatus that is subjected to combustion, setting of the carburetor
Standby until combustion starts at a constant temperature
Temperature, the first set temperature and the second set point during combustion operation.
The constant temperature is preset and the standby temperature and the first
The conditions of the set temperature and the second set temperature of
Degree <first set temperature <second set temperature, and combustion starts
The above vaporizer is preheated to the standby temperature until
Control so that it is sent to the vaporizer during combustion operation.
The temperature of the stored air is below the reference temperature and continues for a certain period of time.
In some cases, if the vaporizer is controlled to the second set temperature on the high temperature side,
In both cases, the carburetor is set to the first setting on the low temperature side otherwise.
Equipped with a controller to control the temperature, so start combustion
Until the vaporizer is preheated to the standby temperature,
The preheating can prepare for the start of combustion, and
The standby temperature is the first and second carburetors during combustion.
Combustion by setting the temperature lower than the set temperature
The vaporizer is overheated
Low power consumption, low electricity cost
You can On the other hand, during combustion operation, the carburetor may be used under severe environmental conditions, such as when the temperature of the air sent to the carburetor is below the reference temperature and continues for a certain period of time .
Is controlled to the second set temperature on the high temperature side, so that the problem of reliquefaction of vaporized oil is eliminated. In the case environmental conditions are not severe, it is controlled to the first predetermined temperature of the low temperature side
Runode, heating costs can be suppressed low for carburetor insulation. Further, according to the oil vaporization type combustion device of the second aspect, in addition to the effect of the configuration of the first aspect, the temperature of the air sent to the carburetor and the duration thereof during the combustion operation are determined at predetermined intervals. Since the controller for controlling so as to monitor is provided, it is possible to detect more accurately the case where the environmental conditions are severe, such as the case where the temperature of the air sent to the vaporizer is equal to or lower than the reference temperature and continues for a certain time. Therefore, when the above condition is detected, the second set temperature on the high temperature side can be promptly selected as the set temperature of the vaporizer, the reliquefaction phenomenon of the vaporized oil can be reliably prevented, and the environmental condition You can react quickly to changes.
According to the oil vaporization type combustion device of claim 3,
In addition to the effect of the configuration according to claim 1 or 2, control is performed so that the set temperature of the carburetor from the start of combustion until a certain time elapses selects the first set temperature on the low temperature side to perform vaporization. Since it is equipped with a controller for
It is possible to prevent raising the set temperature of the carburetor in an uncertain state, and to prevent wasteful consumption of electric heating costs .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an oil vaporization type combustion device according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining a control operation of a carburetor in the oil vaporization type combustion device according to the embodiment of the present invention.

[Explanation of symbols]

10 heat exchange cans 20 vaporizer 22 Vaporization heater 23 Vaporizer temperature sensor 24 burners 30 blower 31 Air supply temperature sensor 40 hot water supply circuit 44 Water sensor 50 bath reheating circuit 54 water flow switch 60 oil sub tank 80 controller

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-106918 (JP, A) JP-A-2-13712 (JP, A) JP-A-10-47660 (JP, A) JP-A-5- 240428 (JP, A) JP-A-9-178171 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23N 5/02 F23D 11/02-11/10 F23D 11/44

Claims (3)

(57) [Claims] 1. The oil is vaporized by a vaporizer, and the vaporized oi
The air supplied from the blower is mixed with the burner
Oil vaporization type combustion device designed to be used for combustion
AndAs the set temperature of the vaporizer,
Standby temperature and first setting during combustion operation
Preset the temperature and the second set temperature ,And the standby temperature, the first set temperature, and the second set
The conditions for temperature are: standby temperature <first set temperature <first
2 set temperature, Standby the carburetor before starting combustion
It is controlled to preheat to the temperature, and during combustion operation,
When the temperature of the air sent to the gasifier is below the reference temperature and constant
When continuing for a while, set the vaporizer to the second set temperature on the high temperature side.
In addition to controlling the carburetor,
Equipped with a controller for controlling the first set temperature That
Characteristic oil vaporization type combustion device. 2. The oil vaporization system according to claim 1, further comprising a controller for controlling the temperature of the air sent to the carburetor and its duration for every predetermined time during combustion operation. Combustion device. 3. A controller for controlling the carburetor set temperature from the start of combustion until a predetermined time elapses so that the first set temperature on the low temperature side is selected and vaporization is performed. The oil vaporization type combustion device according to claim 1.