JP3074090B2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater such as an oil fan heater.

[0002]

2. Description of the Related Art FIG. 7 shows an overall configuration of a conventional hot air heater. In FIG. 7, 1 is a heater main body, 2 is a combustor that generates heat, 3 is a burner that mixes fuel such as kerosene with air and burns, and 4 is an interior of the burner 3 that guides generated heat upward. Combustion chamber, 5 is a convection blower that takes in indoor air into heater 1 and blows out hot air, 6 is a hot air outlet, 7
Is a louver disposed at the hot air outlet, 8 is a temperature detector for detecting the indoor temperature, 9 is an operation unit provided with switches for selecting ON / OFF of operation, selection of a set temperature, and the like.
Is a control unit composed of a microcomputer.

[0003] A vaporizer (not shown) for vaporizing fuel such as kerosene and sending it to the burner 3 is incorporated in the heater body 1, and the kerosene vapor from the vaporizer sucks air by an ejector effect. While they are mixed with each other in the burner 3, they burn on the upper surface. The heat generated by this flows out from the upper part of the combustion chamber 4, is mixed with the room air taken in by the convection blower 5, becomes hot air and blows out of the main body 1 from the outlet 6 through the louver 7. And warm the room.

Next, the operation of the heater will be described with reference to a flowchart shown in FIG. First, the power is turned on and the operation is started, the user sets a desired temperature using the operation unit 9, and the burner 3 is ignited. And the control part 10
The drive of the combustor 2 and the convection blower 5 is automatically controlled based on the difference between the room temperature detected by the temperature detector 8 provided on the back of the main body 1 and the set temperature.

At this time, the heating output of the combustor 2 is selected from strong, medium, weak and fine depending on the temperature difference, and as the room temperature gradually rises and approaches the set temperature, it becomes stronger → medium → weak → It switches to fine. Then, the rotation speed of the convection blower 5 is automatically set to strong, medium, weak,
Fine is selected, and the combustor 2 and the convection blower 5 uniquely correspond.

[0006]

In the conventional hot air heater, the quality of the adjustment of the room temperature is substantially influenced by both the combustor 2 and the convection blower 5, but after the combustor 2 is ignited quickly If the room temperature is to be raised uniformly, the higher the rotation speed of the convection blower 5, that is, the larger the air volume, the faster the temperature rise can be expected in any heating output of the combustor 2.

However, when the rotation speed of the convection blower 5 is increased, there are problems such as combustion stability of the combustor 2 and noise of the convection blower 5. Corresponding to the number of rotations of 5, the lower the output, the better the lower the rotation, but the faster the temperature could not be expected.

[0008] In view of the above, an object of the present invention is to provide a warm air heater capable of efficiently increasing a room temperature and quickly achieving a comfortable room temperature distribution.

[0009]

As shown in FIGS. 1 and 2, a means for solving the problem according to the first aspect of the present invention comprises a heating unit 1 having a heating unit 2 for generating heat, and a heating unit for converting the generated heat into hot air. 1
A convection blower 5 that blows out, a temperature detector 8 that senses the indoor temperature T, and a drive of the heating unit 2 and the convection blower 5 so as to reach a set temperature T0 based on an output signal of the temperature detector 8. A control unit 20 for controlling the room temperature T, and comparing the room temperature T with an operation switching temperature T1 set in advance to the set temperature T0 or lower.
1, a normal heating operation unit 23 chamber temperature T is for changing the rotational speed of the convection fan 5 depending on the heating output of the heat generating portion 2 is higher than the operating switching temperature T1, the indoor temperature T
Heating of the heat generating unit 2 when the operation switching temperature is lower than T1
Normal rotation operation of the convection blower 5 according to the output
That is, the heating output of the heat generating unit 2 is
In the case of strong, the rotation speed of the convection blower 5 is increased, and heating is performed.
Rapid heating operation means to set the rotation speed to medium when the output is weak
22 .

As shown in FIG. 3, when the operation by the normal heating operation means 23 is performed by the control unit 20, the room temperature T is changed to the operation switching temperature T1.
An operation continuation unit 26 is provided for continuing the operation by the normal heating operation unit 23 even if the temperature decreases.

[0011] The problem-solving means according to claim 3, the control part 2
0, a room temperature determining means for comparing the room temperature T with a first operation switching temperature T2 preset to a temperature lower than the preset temperature T0 and a second operation switching temperature T3 set higher than the first operation switching temperature T2. 27, the normal heating operation unit 23 chamber temperature T is for changing the rotational speed of the convection fan 5 depending on the heating output of the heat generating portion 2 is higher than the first operating switching temperature T2, the indoor temperature T is first If it is lower than the operation switching temperature T2
Of the convection blower 5 according to the heating output of the heating unit 2
Rapid heating driver that increases the number of rotations compared to normal heating operation
A stage 22, while driving by the quick heating operation unit 22, in which the operation changeover means 28 indoor temperature T is switched to the operation by the ordinary heating operation unit 23 is higher than the second driving switching temperature T3 is provided .

[0012]

According to the first aspect of the present invention, when the operation is started, when the room temperature T is lower than the preset operation switching temperature T1, the operation is switched to the operation by the rapid heating operation means 22, and the room temperature T is changed to the operation. When the temperature is higher than the switching temperature T1, the operation is switched to the operation by the normal heating operation means 23.

In the operation by the rapid heating operation means 22, the heating output of the heat generating portion 2 is changed to the room temperature T and the operation switching temperature.
The heating output of the heating unit 2 is varied according to the temperature difference from T1.
, The rotation speed of the convection blower 5 is increased,
When the force is weak, the motor is driven with the number of rotations set to medium. And
When the room temperature T rises and becomes equal to or higher than the operation switching temperature T1,
The operation is switched to the normal heating operation means 23, and the room temperature control is performed while varying the rotation speed of the convection blower 5 according to the heating output of the heat generating unit 2 so that the room temperature T becomes the set temperature T0.

In the means for solving the problems according to the second aspect, the room temperature T increases from the start of the operation and the operation switching temperature T1
When it becomes higher, the operation by the rapid heating operation means 22 is switched to the operation by the normal heating operation means 23, and thereafter, the operation by the rapid heating operation means 22 does not return. Therefore, once the temperature reaches the operation switching temperature T1, the comfortable operation by the normal heating operation means 23 is performed.

According to a third aspect of the present invention, when the room temperature T is lower than the first operation switching temperature T2 at the start of the operation, the operation by the rapid heating operation means 22 is performed,
During operation by the rapid heating operation means 22, the indoor temperature T
When the temperature becomes higher than the operation switching temperature T3, the operation is switched by the operation switching unit 28 to the operation by the normal heating operation unit 23. Thereafter, the operation by the normal heating operation means 23 is continued.

Therefore, the room temperature T is quickly raised at a low temperature such as early in the morning in winter, and when the room temperature is relatively high such as in early spring, the operation by the normal heating operation means 23 can be performed from the beginning.

[0017]

【Example】

(First Embodiment) FIG. 1 is an overall configuration diagram of a hot air heater of a first embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the hot air heater of the first embodiment. The same components as those in the related art are denoted by the same reference numerals.

As shown in FIG. 1, the warm air heater of the present embodiment comprises a heater 1 having a combustor 2 for generating heat and a convection blower 5 for blowing the generated heat out of the main body 1 as hot air. ,
A temperature detector 8 for sensing a room temperature T;
A control unit 2 that controls the driving of the combustor 2 and the convection blower 5 so as to reach the set temperature T0 based on the output signal of
0. Note that the structure of the hot air heater is the same as that of the related art, and thus a detailed description is omitted.

The control section 20 comprises a microcomputer, and is mounted on a control board 20a provided inside the operation section 9. Then, a room temperature determining means 21 for comparing the room temperature T with an operation switching temperature T1 set in advance to the set temperature T0 or less, and when the room temperature T is lower than the operation switching temperature T1, the rotation speed of the convection blower 5 is reduced. A rapid heating operation means 22 for increasing the temperature, a normal heating operation means 23 for varying the rotation speed of the convection blower 5 according to the heating output of the combustor 2 when the room temperature T is higher than the operation switching temperature T1, A burner combustion means 24 for burning the combustor 2 in response to command signals from the rapid heating operation means 22 and the normal heating operation means 23; and a convection blower in response to command signals from the rapid heating operation means 22 and the normal heating operation means 23 Fan driving means 25 for rotating 5
And

The rapid heating operation means 22 is provided with a room temperature T
The heating output of the combustor 2 is selected from strong, medium, weak and fine depending on the magnitude of the difference between the temperature and the operation switching temperature T1, and the room temperature T gradually rises and approaches the operation switching temperature T1. The order changes from strong to medium to weak to fine. The number of rotations of the convection blower 5 is switched between two stages so that the heating output is high when the heating output is high or medium, and is high when the heating output is low or low. The operation switching temperature T1 can be set and changed by the operation unit 9.

The normal heating operation means 23 controls the room temperature T
The heating output of the combustor 2 is selected from strong, medium, weak, and fine depending on the magnitude of the difference between the room temperature T0 and the set temperature T0.
As the temperature gradually rises and approaches the set temperature T0, the mode is switched from strong to medium to weak to fine. Then, the rotation speed of the convection blower 5 is automatically switched to high, medium, weak, or fine according to the magnitude of the heating output.

Next, the operation of the hot air heater will be described with reference to the flowchart shown in FIG. First, the power is turned on and the operation is started. In ST1, the user sets a desired temperature T0 from the operation unit 9. Then, the burner 3 of the combustor 2 is ignited to start combustion. At this time, in ST2, the room temperature T is compared with a preset operation switching temperature T1 (18 ° C. in the present embodiment) by the room temperature determining means 21.
When the room temperature T is lower than the operation switching temperature T1, the operation is switched to room temperature control I (ST3). When the room temperature T is higher than the operation switching temperature T1, the operation is switched to room temperature control II (ST4).

In ST3, the operation by the rapid heating operation means 22 is performed, the heating output of the combustor 2 is switched from high to low by the temperature difference, and the rotation speed of the convection fan 5 is high and medium. When the room temperature T rises to 18 ° C. or more, the operation mode is switched to ST4, and the normal heating operation means 2 is switched to ST4.
3 is performed, and the room temperature is controlled so that the room temperature T becomes the set temperature T0. Also, the normal heating operation means 23
When the room temperature T is lowered to 18 ° C. or less during the operation by the room ventilation or the like, the mode is switched to the rapid heating operation means 22 again, and this operation is repeated.

Thus, the room temperature T when the power is turned on is
Since it is lower than the so-called comfortable room temperature (it is said to be about 18 to 24 ° C), the warm air blown out from the heater rises due to the buoyancy caused by the difference in density between the indoor low-temperature air and the conventional air-conditioning operation. The temperature near the floor is less likely to rise. However, when the room temperature T is lower than 18 ° C., since the rotation speed (strong, medium) of the convection blower 5 is high with respect to the heating output (strong, medium, weak, fine) of the combustor 2, the air is blown out. The air volume is large, the convection of the air in the room is improved, the room temperature T can be raised and uniformed more quickly, and the room temperature distribution during heating is improved more than before.

When the room temperature T becomes higher than 18 ° C., the number of revolutions (strong, medium, weak, fine) depends on the heating output (strong, medium, weak, fine).
(Medium, weak, fine) can be varied, so that at a comfortable room temperature, a quiet heating operation with a slight heating output and a slight rotation speed can be performed, and the comfort is improved.

In particular, when the set temperature T0 is set to about 18 ° C. for the purpose of energy saving operation, the heating output decreases as the room temperature T approaches the set temperature T0 in the conventional heating method, and the rotation of the convection blower 5 is increased. Since the number was small, the rise of the room temperature T was slow, and the deviation of the room temperature distribution was large. At a setting of 18 ° C., there was a feeling of cold and warm, and energy saving operation was not much liked. However, according to this embodiment,
Even when the set temperature T0 is 18 ° C., the convection of the indoor air is enhanced, and the indoor temperature distribution is improved, so that the feeling of cool and warm is improved and the effect of energy-saving operation can be expected.

(Second Embodiment) FIG. 3 is a block diagram of a control section of the hot air heater of the second embodiment, and FIG. 4 is a flowchart showing the operation of the hot air heater of the present embodiment.

As shown in FIG. 3, in the warm air heater of this embodiment, when the control unit 20 is operated by the normal heating operation means 23, even if the room temperature T becomes lower than the operation switching temperature T1, as shown in FIG. An operation continuation unit 26 for continuing the operation by the normal heating operation unit 23 is provided. The other configuration is the same as that of the first embodiment.

As shown in FIG. 4, in this embodiment, when the room temperature T rises from the start of the operation and becomes higher than the operation switching temperature T1, the operation is switched to the operation by the normal heating operation means 23, and thereafter, the rapid heating operation is performed. It does not return to the operation by the driving means 22.

In this case, if the operation switching temperature T1 is determined to be the set temperature T0 set by the user during operation, the convection is performed until the room temperature T rises and reaches the set temperature T0 after the heater is ignited. The rotation of the blower 5 becomes large, the room temperature T is rapidly increased, and once the temperature reaches the set temperature T0, the comfortable operation by the normal heating operation means 23 is performed. Therefore,
Comfort is improved, and energy can be saved.

(Third Embodiment) FIG. 5 is a block diagram of a control section of the hot air heater of the third embodiment, and FIG. 6 is a flowchart showing the operation of the hot air heater of the present embodiment.

As shown in FIG. 5, in the warm air heater of the present embodiment, the control unit 20 controls the room temperature T and the first operation switching temperature T2 and the first operation switching temperature set at a temperature lower than the preset temperature T0. Room temperature determining means 27 for comparing the second operation switching temperature T3 set higher than T2, and rapid heating operation means 22 for increasing the rotation speed of the convection blower 5 when the room temperature T is lower than the first operation switching temperature T2. A normal heating operation means 2 for varying the number of revolutions of the convection blower 5 according to the heating output of the combustor 2 when the room temperature T is higher than the first operation switching temperature T2.
Operation switching means 2 for switching to operation by the normal heating operation means 23 when the room temperature T is higher than the second operation switching temperature T3 during operation by the rapid heating operation means 22;
8 is provided.

As shown in FIG. 6, in this embodiment, the first operation switching temperature T2 and the second operation switching temperature T3 are set in advance. Note that T2 = 12 ° C. and T3 = 18 ° C.

In this case, the room temperature is 12 ° C. at the start of operation.
When the temperature is lower, the operation by the rapid heating operation means 22 is performed, and when the room temperature becomes higher than 18 ° C., the operation switching means 2
8, the operation is switched to the operation by the normal heating operation means 23, and thereafter the operation by the normal heating operation means 23 is continued.

As described above, when the ignition is performed at a low temperature, such as in the early morning of winter, the operation is performed by increasing the rotation of the convection blower 5, so that the room temperature T can be quickly raised.

When the room temperature T at the start of operation is relatively high, such as early spring (12 ° C. or higher), the normal heating operation means 23 is operated from the beginning after ignition, so the room temperature T rises too high. Can be prevented.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention.

For example, in the above-described embodiment, the combustor 2 and the convection blower 5 are controlled by the two types of control means so that the room temperature T
And the room temperature T is raised early. However, even when the heating output and the rotation speed of the convection blower 5 are not uniquely determined by fuzzy control or the like, the temperature is set to the preset temperature. It can also be applied to means such as changing the fuzzy rules before and after reaching. In the rapid heating operation, the number of revolutions of the convection blower 5 is changed in two stages, but may be constant at a high speed.

In the above embodiment, the heat generated by the combustor 2
Has been described, but the present invention can also be applied to a hot air heater using a ceramic heater or an electric heater.

[0040]

As is apparent from the above description, according to the first aspect of the present invention, when the room temperature at the time of turning on the power is lower than the operation switching temperature, the rotation speed of the convection blower is set to be higher than at the normal time . In addition, the amount of air blown out is large, and the convection of the indoor air is improved, so that the temperature in the room , especially near the floor, can be increased more quickly and the indoor temperature distribution can be made uniform. Also warm
If the chamber power is low, set the convection fan speed to medium.
Suppress noise while raising the indoor temperature efficiently
be able to.

Further, when the room temperature becomes higher than the operation switching temperature, the number of revolutions is varied according to the heating output, so that a quiet heating operation with a slight heating output and a small number of revolutions can be performed, thereby improving comfort.

According to the second aspect, after the operation is started, the operation is performed by the rapid heating operation means until the room temperature rises and reaches the set temperature, and after the temperature reaches the set temperature, the operation is resumed by the normal heating operation means. Switch and continue. Therefore, once the room temperature rises, the operation becomes quiet, the comfort is improved, and energy saving is possible.

According to the third aspect, since the first switching temperature is set to a low temperature, when the operation is started at a low temperature such as early in the morning in winter, the operation is performed by increasing the rotation of the convection blower. The room temperature can be raised quickly.

When the room temperature at the start of operation is relatively high, such as in the early spring, the operation by the normal heating operation means is performed from the beginning, so that the room temperature can be prevented from rising too much.

As described above, the change of the operation method can be handled by the microcomputer program or the like with respect to the conventional one, and the structure is not complicated as compared with the conventional shape. It is possible to provide a warm air heater having an excellent energy saving effect without performing.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a hot air heater according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the warm air heater of the first embodiment.

FIG. 3 is a block diagram of a control unit of the hot air heater according to the second embodiment.

FIG. 4 is a flowchart showing the operation of the hot air heater of the second embodiment.

FIG. 5 is a block diagram of a control unit of the hot air heater according to the third embodiment.

FIG. 6 is a flowchart showing the operation of the hot air heater of the third embodiment.

FIG. 7 is an overall configuration diagram of a conventional hot air heater.

FIG. 8 is a flowchart showing the operation of a conventional hot air heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heater main body 2 Heating part 5 Convection blower 8 Temperature detector 20 Control part 21 Room temperature judgment means 22 Rapid heating operation means 23 Normal heating operation means 26 Operation continuation means 27 Room temperature judgment means 28 Operation switching means T Indoor temperature T0 Set temperature T1 Operation switching temperature T2 First operation switching temperature T3 Second operation switching temperature

Claims (3)

(57) [Claims] 1. A heating unit for generating heat in a heater main body, a convection blower for blowing generated heat out of the main body as hot air, a temperature detector for sensing indoor temperature, and an output of the temperature detector. In a warm air heater having a control unit that controls the driving of the heat generating unit and the convection blower so as to reach a set temperature based on a signal, the control unit is set to a room temperature and a temperature equal to or less than the set temperature in advance. Room temperature determining means for comparing the operation switching temperature, normal heating operation means for varying the number of revolutions of the convection blower according to the heating output of the heating portion when the room temperature is higher than the operation switching temperature, When the temperature is lower than the operation switching temperature, the heating output of the heat-generating unit is changed to the room temperature and the set temperature.
Switch to multiple stages below strong output depending on temperature difference from temperature
Together with the convection fan rotation speed other than the strong output
And a rapid heating operation means for increasing the size of the hot air heating operation from the normal heating operation. 2. The normal heating operation unit according to claim 1, wherein the controller is operated by the normal heating operation unit even when the room temperature falls below the operation switching temperature. A hot air heater provided with operation continuation means for continuing the operation of the hot air heater. 3. A heating unit for generating heat in a heater body, a convection fan for blowing the generated heat out of the body as hot air, a temperature detector for sensing indoor temperature, and an output of the temperature detector. In a warm air heater having a control unit that controls the driving of the heat generating unit and the convection blower so as to reach a set temperature based on a signal, the control unit sets the room temperature and a temperature lower than the set temperature in advance. Room temperature determining means for comparing the set first operation switching temperature with a second operation switching temperature set higher than the first operation switching temperature; and heating the heating section when the room temperature is higher than the first operation switching temperature. A normal heating operation means for varying the number of revolutions of the convection blower in accordance with an output, and a heating output of the heating section when the room temperature is lower than the first operation switching temperature.
Depending on the temperature difference between the room temperature and the set temperature.
Power and switching to multiple stages and turning the convection blower
A rapid heating operation means for increasing the number of turns to be greater than that during the normal heating operation except at the high output ; and during the operation by the rapid heating operation means, when the room temperature is higher than the second operation switching temperature, the normal heating operation means A hot-air heater having operation switching means for switching the operation to a hot air heater.