JPH0552421A - Method for operating kerosene space heater - Google Patents

Abstract

PURPOSE:To stabilize the room temperature with respect to a set temperature and, furthermore, eliminate undesirable influences due to the residual liquefied kerosene by carrying out a forced strong combustion operation for a certain time at first only when the temperature of a combustion tube that is detected is below the reliquefaction temperature of the kerosene at the time of restarting combustion and, after this, changing over the combustion capability according to the room temperature. CONSTITUTION:On the rear side of a kerosene space heater 1, a room temperature sensor is provided, and a combustion chamber 4 is provided in the space heater 1, and a combustion burner 5 is provided below the combustion chamber 4. And, a vaporizer 6 that vaporizes the kerosene that is sent to the burner 5, vaporizer nozzle 7, heater 8, and a vaporizer temperature sensor 9 that detects the temperature of the vaporizer 6 are provided. Here, at the time of starting against the combustion only when the detected temperature of a combustion tube is below the temperature of the re- liquefaction of the kerosene, a forced strong combustion operation is carried out for a certain time at first, and later the ordinary operation which changes over the combustion capability according to room temperature is performed. With this arrangement, it is possible to re-evaporate the liquefaction kerosene and prevent the accumulation of the re-liquefaction kerosene.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating an oil heater.

[0002]

2. Description of the Related Art In a conventional oil heater, a room temperature is detected with respect to a set room temperature, combustion is automatically stopped when the room temperature rises to a predetermined room temperature, and combustion stops when the room temperature drops to a predetermined room temperature. A driving method that automatically starts is provided. And during the combustion operation,
There is also provided an operation method for making the room temperature good and stable with respect to the set temperature by switching the combustion capacity according to the room temperature.

[0003]

On the other hand, in the above-mentioned conventional method for operating an oil heater, the residual oil may be liquefied in the combustion pipe during re-combustion. Was carried out for a certain period of time, and then a normal combustion operation was performed in which the combustion capacity was changed according to the room temperature. However, due to the forced operation due to the strong combustion, the room temperature rises and falls sharply, and the actual room temperature is not stable with respect to the set temperature.

Therefore, the present invention solves the above-mentioned drawbacks of the conventional method for operating an oil heater, makes it possible to stabilize the room temperature relative to the set temperature and stabilizes it, and does not cause adverse effects due to residual liquefied petroleum. The purpose is to provide a method of operating the heater.

[0005]

In order to achieve the above object, an operating method of an oil heater according to the present invention is to automatically start combustion at a predetermined room temperature with respect to a set room temperature and to perform combustion at a predetermined room temperature. In an oil heater that automatically shuts down, only when the detected combustion pipe temperature is below the reliquefaction temperature of petroleum at the start of reburning, first perform a forced strong combustion operation for a certain period of time.
After that, the first feature is to perform a normal combustion operation in which the combustion capacity is switched according to the room temperature. Further, in the operation method of the oil heater of the present invention, the combustion is automatically started at a predetermined room temperature with respect to the set room temperature. Also, in an oil heater that automatically stops combustion at a predetermined room temperature, only when the time from automatic combustion stop to the next automatic combustion start is more than the standard time until vaporized gas in the combustion pipe is reliquefied, first The second feature is that the forced strong combustion operation is performed for a certain period of time, and then the normal combustion operation in which the combustion ability is switched according to the room temperature is performed.

[0006]

According to the first feature of the present invention, the forced strong combustion operation is performed prior to the normal combustion operation only when the combustion pipe temperature detected at the start of combustion is equal to or lower than the reliquefaction temperature of petroleum. By forcibly performing the strong combustion operation for a certain period of time, it is possible to prevent the liquefied fuel generated in the combustion pipe from being volatilized and removed each time, and to be accumulated in the combustion pipe. On the other hand, when the detected temperature exceeds the reliquefaction temperature, the normal combustion operation with the combustion capacity according to the room temperature is performed from the beginning. As a result, the temperature adjustment is favorably performed, and it is possible to provide a favorable and stable indoor temperature with respect to the set temperature.
Further, according to the second feature of the present invention, the normal combustion operation is performed only when the time from the automatic combustion stop to the next automatic combustion start is the standard time or more until the vaporized gas in the combustion tube is reliquefied. Prior to this, forced strong combustion operation is performed for a certain period of time.
By forcibly performing the strong combustion operation, the liquefied fuel generated in the combustion pipe is volatilized and removed each time, and it is prevented that the liquefied fuel is accumulated in the combustion pipe. On the other hand, when the detection time is less than the standard time until the reliquefaction, the normal combustion operation with the combustion ability according to the room temperature is performed from the beginning. As a result, the temperature adjustment is favorably performed, and it is possible to provide a favorable and stable indoor temperature with respect to the set temperature.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is an external view of a petroleum hot air heater that has been subjected to the method of the present invention, FIG. 2 is a diagram showing the structure of an essential part of the oil heater, and FIG. 3 is a combustion pipe temperature after automatic digestion and a carburetor temperature detection sensor FIG. 4 is a flow chart showing a first method for carrying out the method of the present invention, FIG. 5 is a diagram showing a temporal change in the temperature of the combustion tube after automatic extinguishing, and FIG. 6 is a flow chart showing the method of the present invention. It is a flowchart which shows a 2nd implementation method.

In FIG. 1, a hot air blowout port 2 is provided on the front surface of a petroleum hot air heater 1, and an operation section 3 is provided thereon. A room temperature detection sensor (not shown) is provided on the back side of the oil warm air heater 1. In FIG. 2, a combustion chamber 4 is provided inside the heater 1, and a combustion pipe 5 is provided below the combustion chamber 4. Further, a vaporizer 6 for vaporizing the oil sent to the combustion pipe 5, a vaporizer nozzle 7, a heater 8 and a vaporizer temperature detection sensor 9 for detecting the temperature of the vaporizer 6 are provided. Oil is sent to the vaporizer 6 from an oil tank (not shown) by a pump 10 through an oil feed pipe 11.

A controller (not shown) is provided inside the back side of the operation section 3, and by operating the operation section 3, a predetermined control operation is instructed to each section. A first implementation method of the operating method of the present invention by the controller will be described below with reference to FIGS. 3 and 4.

In FIGS. 3 and 4, when the room temperature is set by the operation unit 3 and the heating operation is started, the controller starts the first combustion with strong combustion according to a predetermined ignition sequence (step). 51). Then, when the room temperature detected by the room temperature detection sensor reaches a predetermined temperature (the set temperature + 4 ° C. in the embodiment) with respect to the set temperature, the combustion is stopped (step 5
2, 53). When the room temperature drops to a predetermined temperature (the set temperature in the embodiment) with respect to the set temperature due to the stop of combustion (step 5
4), carburetor 6 at that time by carburetor temperature detection sensor 9
The temperature t is detected (step 55), and it is determined whether the detected temperature t is below the reference temperature (step 56). When the temperature is lower than the reference temperature, the forced strong combustion operation is performed for a fixed time, for example, 2 minutes (step 57), and then the normal combustion operation is started (step 58). On the other hand, in step 56, the detected temperature t
If the temperature exceeds the reference temperature, the normal combustion operation starts immediately (step 58).

The reference temperature is determined as follows. That is, as shown in FIG. 3, the relationship between the temperature of the carburetor by the carburetor temperature detection sensor 9 and the temperature of the combustion pipe 5 after the automatic combustion stop is known by a preliminary experiment depending on the type of the oil hot air heater. be able to. For example, in FIG. 3, when the temperature of the combustion tube 5 drops to 300 ° C. for the reliquefaction temperature of vaporized fuel, the carburetor temperature drops to 200 ° C. Therefore, this 200 ° C. may be used as the reference temperature. When the temperature detected by the carburetor temperature detection sensor 9 is equal to or lower than the reference temperature (200 ° C.), the temperature of the combustion tube 5 is equal to or lower than the reliquefaction temperature (300 ° C.), so the forced strong combustion operation is first performed. In addition, although the time of the forced strong combustion operation is set to 2 minutes in the embodiment, it is changed according to the type of the heater, and is not limited. On the other hand, when the detected temperature exceeds the reference temperature (200 ° C.), the temperature of the combustion tube 5 is reliquefied (300
℃) has been exceeded, normal combustion operation is started without performing forced strong combustion operation. Of course, a temperature sensor may be directly provided in the combustion pipe 5, and the temperature of the combustion pipe 5 may be directly detected to determine whether or not it is the reliquefaction temperature. In this embodiment, the carburetor temperature detection sensor 9 is also used.

The normal combustion operation is an operation suitable for controlling the room temperature to a set temperature, and is a method of weakening the combustion near the set temperature in the second and subsequent combustions. For example, if re-combustion starts when the room temperature falls to the set temperature, the re-combustion starts with strong combustion, but 0.5 ℃ below the set temperature.
When the temperature rises, the combustion ability is reduced, and thereafter, the operation is performed with a low combustion ability until the temperature reaches an automatic extinction (automatic combustion stop) temperature, for example, a set temperature + 4 ° C. On the other hand, by performing the forced strong combustion operation in step 57, the liquefied fuel generated in the combustion pipe is volatilized and removed each time, and it is prevented that the liquefied fuel is accumulated in the combustion pipe.

A second embodiment of the method of the present invention will be described with reference to FIGS. In the present embodiment, the time m from the stop of automatic combustion to the start of re-combustion is detected (step 65), and whether the detected time is longer than the standard time until the vaporized fuel remaining in the combustion pipe 5 is liquefied or not. It is determined (step 66). In the above case, it is determined that the fuel in the combustion pipe 5 is liquefied, so the forced strong combustion operation is performed for a certain time, for example, 2 minutes (step 67), and then Normal combustion operation starts (step 68). On the other hand, if the time m is less than the reference time in step 66, the normal combustion operation is immediately started (step 58).
.. The other steps 61 to 64 are the same as steps 51 to 54 in the first embodiment. By performing the forced strong combustion operation in step 66, the liquefied fuel generated in the combustion pipe is volatilized and removed each time, and it is prevented that the liquefied fuel is accumulated in the combustion pipe.

[0014]

According to the method of operating an oil heater according to the present invention, the combustion pipe temperature detected at the start of reburning is equal to or lower than the reliquefaction temperature of petroleum. Only in this case, the forced strong combustion operation is first performed for a certain period of time, and then the normal combustion operation in which the combustion capacity is switched according to the room temperature is performed, so only when there is a possibility that reliquefied petroleum is generated in the combustion pipe, Each time, it is possible to prevent the reliquefied petroleum from being re-evaporated and accumulated. In addition, since the normal operation is performed in which the combustion capacity can be switched according to the room temperature during normal operation, it is possible to achieve a room temperature that is good and stable with respect to the set temperature. According to the method for operating an oil heater according to claim 2, first, only when the time from the automatic combustion stop to the next automatic combustion start is equal to or longer than the standard time until the vaporized gas in the combustion pipe is reliquefied, Since the forced strong combustion operation is performed for a certain period of time and then the normal combustion operation in which the combustion capacity is switched according to the room temperature is performed, the useless forced strong combustion operation can be eliminated as in the invention of claim 1. Therefore, it is possible to realize the provision of a good and stable temperature with respect to the set temperature. Moreover, it is possible to prevent the residual liquefied petroleum from accumulating in the combustion pipe.

[Brief description of drawings]

FIG. 1 is an external view of a petroleum hot air heater in which the method of the present invention has been carried out.

FIG. 2 is a diagram showing a main structure of an oil heater.

FIG. 3 is a diagram showing a relationship between a combustion pipe temperature after automatic digestion and a temperature detected by a carburetor temperature detection sensor.

FIG. 4 is a flowchart showing a first implementation method of the method of the present invention.

FIG. 5 is a diagram showing a temporal change of a combustion pipe temperature after automatic extinguishing.

FIG. 6 is a flowchart showing a second implementation method of the method of the present invention.

[Explanation of symbols]

 1 Petroleum hot air heater 4 Combustion chamber 5 Combustion tube 6 Vaporizer 9 Vaporizer temperature detection sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomofumi Kinugasa 32 Akashi-cho, Chuo-ku, Hyogo Prefecture Noritsu, Ltd. (72) Inventor Yasushi Yamazaki 32 Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture Noritsu Within

Claims (2)

[Claims] 1. In an oil heater that automatically starts combustion at a predetermined room temperature with respect to a set room temperature and automatically stops combustion at a predetermined room temperature, the detected combustion pipe temperature is An operating method for an oil heater, wherein first, a forced strong combustion operation is performed for a certain period of time only when the reliquefaction temperature is lower than the reliquefaction temperature, and then a normal combustion operation is performed in which the combustion capacity is switched according to the room temperature. 2. In an oil heater that automatically starts combustion at a predetermined room temperature with respect to a set room temperature and automatically stops combustion at a predetermined room temperature, the time from automatic combustion stop to next automatic combustion start Only when the vaporized gas in the combustion pipe is longer than the standard time until reliquefaction, the forced strong combustion operation is first performed for a certain time, and then the normal combustion operation is performed in which the combustion capacity is switched according to the room temperature. How to operate the heater.