JP2000234807A - Hot wind heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety by preventing temperature increase in hot wind due to the blocking of an air inlet. SOLUTION: A combustion part 23 is provided nearly at the center in a casing 2, an air inlet 16 with a dust-filtering function is provided at the casing 2, and at the same time a blower 17 is provided at the downstream side of the air inlet 16. Indoor air that is sucked into the casing 6 by the air inlet 16 passes through a hot air passage 12, is heated by the combustion part 23, and then is discharged as hot wind from an outlet 19 that is provided at the casing 2. In this case, a temperature detector 24 for detecting the temperature of hot wind is provided near the outlet 19. When the temperature detector 24 detects at least a specific temperature increase, the amount of blast of the blower 17 is increased and at the same time the amount of combustion by the combustion part 23 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil hot air heater such as an oil fan heater, and a gas hot air heater such as a gas fan heater, and more particularly to detection of filter clogging of these hot air heaters. is there.

[0002]

2. Description of the Related Art FIG. 2 is a sectional view showing an example of a conventional oil fan heater.

Generally, a conventional oil fan heater 1 is
As shown in FIG. 2, a combustion part 23 having a burner 3 and a combustion chamber 8, a blower 17, and the like are provided in the casing 2, and an air supply having a dust filter function by lath hole processing on the back surface of the casing 2. It has a structure in which the mouth 16 is provided and an outlet 19 to which a plurality of horizontal blades 20 are attached is provided on the front surface of the casing 2.

When the operation switch on the operation panel 21 is turned on, combustion starts in the burner 3 and the temperature of the air in the combustion chamber 8 rises, and the blower 17 rotates and the air is supplied from the air supply port 16 on the upstream side. The sucked indoor air moves forward in the hot air passage 12 while performing heat exchange with the heat of the combustion chamber 8, is guided by the horizontal blades 20, and blows out as warm air from the outlet 19 on the front surface to perform indoor heating.

[0005] By the way, the oil fan heater 1 having the above-described structure.
In the case, the dust and dust in the room induced by the air supply adhere to the lath hole of the air supply port 16 when the air supply port 16 is used for a long period of time. As a result, the amount of air sucked into the casing 2 decreases, and accordingly, the amount of warm air discharged from the outlet 19 decreases. For this reason, heat exchange in the combustion part 23 cannot be performed sufficiently, and the temperature of the hot air passage 12 and the temperature of the hot air discharged outside the machine gradually increase, and eventually the inconvenience that the temperature exceeds the normal range occurs. I do.

Therefore, in the conventional equipment, as a countermeasure against the above-mentioned inconvenience, a bimetal thermostat 14 having a predetermined operating temperature is mounted near the hot air passage 12 where the temperature rises sharply, and the air supply port 16 is clogged due to clogging or the like. When the temperature rises beyond normal use, the combustion is forcibly stopped by the operation of the bimetal thermostat 14.

[0007]

However, since the heating prevention measure by the bimetal thermostat 14 simply turns on / off the combustion, in the case where the temperature inside the machine gradually rises as in the above phenomenon, When the temperature inside the machine reaches the operating temperature of the bimetal thermo 14, the casing 2
Since the temperature of the hot air and the temperature of the hot air rises considerably beyond the normal time, safety problems remain.

The above problem is not limited to the oil fan heater 1,
The same applies to other oil hot air heaters and gas hot air heaters such as gas fan heaters.

The present invention has been made in view of the above problems, and has a temperature detector for detecting the temperature of hot air, and controls the amount of air blown and the amount of combustion based on the temperature change of the hot air accompanying the change in the amount of air blown. Accordingly, it is an object of the present invention to provide a highly safe hot-air heater that prevents an increase in temperature due to clogging of an air supply port.

[0010]

That is, in the present invention,
A combustion section is disposed substantially at the center of the casing, and an air supply port having a dust filter function is provided in the casing, and a blower is disposed downstream of the air supply port, and the air supply port is provided. After heating the room air sucked into the casing through the warm air passage in the combustion section and then discharging the warm air from the outlet provided in the casing, the temperature of the hot air is changed in the vicinity of the outlet. A temperature detector that detects
When the temperature detector detects a temperature rise of not less than a predetermined value, the amount of air blown by the blower is increased and the amount of combustion in the combustion section is reduced.

With the above structure, when the temperature of the hot air rises due to clogging of the air supply port, the amount of blown air increases to increase the amount of warm air, and the amount of combustion decreases to decrease the amount of heat. The temperature rise of the hot air is prevented.

Further, in the present invention, a combustion section is disposed substantially in the center of the casing, and an air supply port having a dust filter function is provided in the casing, and a blower is provided downstream of the air supply port. The hot air heater, which is disposed and heats the room air sucked into the casing from the air supply port through the hot air passage in the combustion section, and then discharges hot air from an outlet provided in the casing. A temperature detector for detecting the temperature of the hot air is disposed near the outlet, and when the temperature detector detects a temperature rise of a predetermined value or more, the amount of air blown by the blower is increased, and the amount of combustion of the combustion unit is increased. And a warning of filter clogging.

In the above configuration, the user can quickly recognize the clogging of the filter section of the air supply port and can clean the filter section as appropriate, so that efficient and comfortable heating can always be performed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of an oil fan heater which is a hot air heater according to the present invention. For the sake of simplicity, the same reference numerals are used in the following description for the same parts as those in the related art.

As shown in FIG. 1, the oil fan heater 1 has a casing 2, and a burner fan 5 is rotatably supported by a burner motor 6 at a substantially central portion in the casing 2. The burner 3 is installed above the burner fan 5, and the burner 3 is provided with a fueling nozzle 7, a spark plug 9, a frame rod 4, and the like. A combustion tube 10 is mounted above the burner 3 so as to form a combustion chamber 8 therein, and the burner 3 and the combustion tube 10 constitute a combustion section 23.
Further, a heat shield plate 11 is attached above the combustion tube 10 so as to cover the combustion chamber 8. The heat shield plate 11 allows a temperature communicating with the combustion chamber 8 to communicate with a lower portion of an outlet 19, which will be described later. An air passage 12 is formed. Further, a partition plate 13 is attached above the heat shield plate 11.
3 and the heat shield plate 11 form a cool air passage 15 communicating with an upper portion of an outlet 19 described later. The partition plate 13 is provided with a bimetal thermo 14. A blower 17 composed of a blower fan 17a and a drive motor 17b is disposed behind the combustion tube 10 (rightward in FIG. 1). An air supply port 16 is formed.
An operation panel 21 having various switches and a display unit is provided on the front surface of the top of the casing 2.

On the front side of the casing 2 (left side in FIG. 1), an outlet 19 is formed so as to be located in front of the combustion tube 10, and four parallel horizontal blades 20 are provided at the mouth. Mounted horizontally. Then, the temperature detector 2 according to the present invention is located at a location where the hot air passes therethrough.
4 (for example, a thermistor) is attached. Reference numeral 22 denotes an electrical unit on which a control device for controlling the combustion operation of the equipment is mounted. The control device of the electrical unit 22 includes the drive motor 1 of the burner motor 6 and the blower 17.
7b, the temperature detector 24 and the like are connected.

Since the oil fan heater 1 has the above configuration, when heating the room using the oil fan heater 1, an operation switch (not shown) of the operation panel 21 is turned on. Then, the burner fan 5 is rotated by the burner motor 6 to supply combustion air to the burner 3, and at the same time, fuel such as kerosene is discharged from the refueling nozzle 7 into the burner 3 to be vaporized. After being mixed with the air, the fuel is ignited by the spark plug 9 to form a flame and burn, so that the temperature of the air in the combustion chamber 8 rises. In this state, the blower fan 17a of the blower 17 rotates by the drive motor 17b to blow air. Then, part of it is in the cold air passage 15
To the upper part of the horizontal blades 20 and the remainder through the hot air passage 12 while guiding the hot air in the combustion chamber 8.
Before you. As a result, the warm air is blown out from the outlet 19 so as to be guided to the horizontal blades 20, and the room is heated.

In this state, if the lath hole (filter portion) of the air supply port 16 is clogged with dust or dirt, the blower 17
, The amount of hot air discharged from the outlet 19 decreases, and the temperature of the hot air increases. The control device monitors the temperature change of the hot air by the detection output of the temperature detector 24. If the temperature of the hot air exceeds a predetermined temperature, it is determined that the filter unit is clogged and the blower 17 By controlling the drive motor 17b, the rotation speed of the blower fan 17a is increased. As a result, the amount of air blow increases, and the warm air can be controlled to the normal temperature without lowering the heating capacity. Further, if the filter section is clogged and it is difficult to control the temperature of the hot air only by adjusting the amount of the blown air, the fuel supply amount is reduced and the burner motor 6 is supplied into the burner 3 at a reduced rotation speed. The amount of combustion is reduced by reducing the amount of combustion air. Thereby, the amount of heat generated in the combustion part 23 is reduced, and the rise of the hot air temperature can be suppressed. The predetermined temperature at which filter clogging is determined is determined, for example, by using the operation panel 2.
It can be assumed from the set temperature value set by one switch.

In the present invention, since the clogged state of the filter portion can be determined from the temperature rise of the hot air, the amount of air blown or the amount of combustion may be appropriately controlled according to the degree of the temperature rise. This prevents the temperature of the hot air from rising and the abnormal heating of the casing 2 when the filter portion is clogged, thereby improving safety.

Further, when clogging of the filter unit is detected, a filter sign can be displayed on the display unit of the operation panel 21. Thus, the user can quickly detect the filter clogging of the air supply port 16 and clean the filter section, so that the filter does not burn for a long time in the clogged state, and always efficient and comfortable heating can be performed. it can.

Although the oil fan heater 1 has been described in the above embodiment, a warm air heater other than the oil fan heater 1 (for example, a gas fan heater or the like) is used as long as it heats by blowing out hot air. Of course, it is also possible to apply the present invention.

[0023]

As described above, according to the first aspect of the present invention, the combustion unit is disposed substantially at the center of the casing, and the casing is provided with a dust filter function. A port was provided, and a blower was disposed downstream of the air supply port. After the room air sucked into the casing from the air supply port was heated in the combustion section through the hot air passage, the air was provided in the casing. In a hot air heater that discharges hot air from an outlet, a temperature detector that detects a temperature of the hot air is disposed near the outlet, and the temperature detector detects a temperature rise of a predetermined value or more. Since the amount of air blown by the blower is increased and the amount of combustion in the burner portion is reduced, it is possible to prevent the temperature of the hot air and the casing from rising when the air supply port is clogged and to always maintain the normal temperature. For,
Safety is improved.

According to the second aspect of the present invention,
A combustion section is disposed substantially at the center of the casing, and an air supply port having a dust filter function is provided in the casing, and a blower is disposed downstream of the air supply port, and the air supply port is provided. After heating the room air sucked into the casing through the warm air passage in the combustion section and then discharging the warm air from the outlet provided in the casing, the temperature of the hot air is changed in the vicinity of the outlet. A temperature detector that detects
When the temperature detector detects a temperature rise of a predetermined value or more, the amount of air blown by the blower is increased, the amount of combustion in the burner portion is reduced, and warning of filter clogging is performed. Since the filter portion can be cleaned by quickly detecting the filter clogging of the air supply port, the filter portion is not used for a long time in the clogged state, and efficient and comfortable heating can always be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an oil fan heater to which the present invention is applied.

FIG. 2 is a sectional view of a conventional oil fan heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-air heater (oil fan heater) 2 Casing 12 Hot-air passage 16 Air supply port 17 Blower 19 Outlet 23 Burning part 24 Temperature detector

Continuation of the front page (72) Minoru Sugimoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F-term (reference) 3K003 RA03 RA08 3L028 EA01 EB01 EB02 EC01 ED03

Claims (2)

[Claims] 1. A combustion unit is provided at substantially the center in a casing, and an air supply port having a dust filter function is provided in the casing, and a blower is provided downstream of the air supply port. A hot air heater that heats indoor air sucked into the casing from the air supply port through the hot air passage in the combustion section and then discharges hot air from an air outlet provided in the casing, in the vicinity of the air outlet; A temperature detector for detecting the temperature of the hot air is provided, and when the temperature detector detects a temperature rise of a predetermined value or more, the amount of air blown by the blower is increased, and the amount of combustion in the combustion section is reduced. A hot air heater. 2. A combustion section is disposed substantially at the center of the casing, and an air supply port having a dust filter function is provided in the casing, and a blower is disposed downstream of the air supply port. A hot air heater that heats indoor air sucked into the casing from the air supply port through the hot air passage in the combustion section and then discharges hot air from an air outlet provided in the casing, in the vicinity of the air outlet; A temperature detector for detecting the temperature of the hot air is disposed, and when the temperature detector detects a temperature rise of a predetermined value or more, the blowing amount of the blower is increased, and the burning amount of the combustion unit is reduced, A warm air heater characterized by warning of filter clogging.