JPH0784948B2 - Hot air heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hot air heater for uniformly heating a room.

2. Description of the Related Art Conventional hot-air heaters usually have a fixed plate (hereinafter referred to as a louver) for controlling the wind direction at the hot-air blowing part, or a shape that can be changed manually. Met.

An example of the conventional warm air heater described above will be described below with reference to the drawings.

FIG. 3 shows a cross section of a conventional warm air heater.
The combustion air sucked from the filter 2 provided on the back surface of the instrument body 1 and the warm air D is mixed with the combustion gas of the burner 3 and is sucked by the convection fan 4 through the air passage 5 to be sucked by the louver 6. It is rectified and becomes hot air 7, which is blown out from the air outlet 14 on the front surface of the instrument body 1. At this time, the louver 6 is fixed and the hot air is blown out only in a fixed direction regardless of the strong or weak combustion of the burner 3.

Problems to be Solved by the Invention In the above-mentioned configuration, it is said that the P tile which is attached to the floor due to the temperature rise of the floor during strong combustion cannot be peeled off.
In order to suppress the temperature to below 0 ° C., the louver having a shape in which warm air blows out from the lower portion of the device body 1 (so-called hot air blowdown) is normally oriented horizontally or upward. However, in this case, when the temperature of the warm air decreases and the amount of air decreases in the weak combustion, the warm air tends to immediately go upward from the outlet. Therefore, the heating effect on the floor in the vicinity of the appliance body 1 was poor.

The present invention solves the above-mentioned drawbacks of the conventional technology.
(EN) Provided is a warm air heater that can obtain uniform heating regardless of weak combustion.

Means for Solving the Problems The present invention is to direct the wind direction control plate of the hot air outlet toward the lower side during weak combustion than during strong combustion.

Action According to the above means, even if the combustion becomes weak and the temperature drops and the air volume becomes small, the hot air is guided downward by the wind direction control plate, and the floor surface can be heated as far forward as possible from the appliance body. .

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The device main body 1, the filter 2, the burner 3, the convection fan 4, the air passage 5, and the warm air outlet 14 are the same as those in the above-described conventional technique, and thus the same reference numerals are given and detailed description and part of the drawings are omitted. . The wind direction control plate 6 is rotatably attached at its rear end to a column 9 via a fulcrum 8 so that the wind direction can be changed in the vertical direction. Reference numeral 10 is a lever having a fulcrum 15, one end of which is rotatably attached to the lower end of the column 9. And the lever 10 is the fulcrum 15
With one side being in the middle, the one end side is pulled downward by the spring 12, and the other end side is pulled by the shape memory alloy spring 11. The springs 11 and 12 are used when the burner 3 is in a sequence of strong combustion (hereinafter simply referred to as strong combustion) by a sequence controller (not shown).
The relationship of springs 11 is satisfied, and the tensile force of the shape memory alloy spring 11 is stronger than that of the spring 12 when the burner 3 is in weak combustion.

In the above-described embodiment, when the burner 3 burns at the maximum input, the air volume is large, and the hot air temperature is high, the strut 9 is pulled by the spring 12 through the lever 10 during strong combustion, as shown in FIG. In addition, the wind direction control plate 6 is oriented substantially horizontally, and the hot air 7 is blown forward without facing downward. Also, burner 3
Is burned with the minimum input, the air volume is small, and the temperature of the hot air is low. In the case of weak combustion, the spring 11 of the shape memory alloy gradually cools down by the hot air and contracts, and the support column 9 is lifted. 2, the wind direction control plate 6 is directed downward as shown in FIG. 2 facing the floor surface in front of the appliance, and the warm air 7'of low temperature and small air volume is the same as that of the conventional product shown in FIG. With respect to the warm air zone A, the zone such as B can uniformly heat the floor surface (30 to 80 cm).

A bimetal may be used in place of the spring 11, or the temperature may be detected by a thermistor and the motor may be rotated by this signal to change the angle of the wind direction control plate 6. Then, at this time, the sequence of strong combustion is switched to the sequence of weak combustion, so that the rotation speed of the convection fan 4 is reduced and the air volume is reduced. However, for a while, warm air with a high temperature, which is heated by more than the heating amount of the burner 3 due to the residual heat of the air passage 5 and the like, is blown out. Since this warm air has a small air volume and a small blowing air velocity, and the wind direction control plate 6 is horizontally oriented,
The buoyancy of the warm air due to the temperature difference from the surrounding air exceeds the horizontal wind speed, and eventually this warm air rises immediately after it is blown out. For this reason, the amount of heat in the living area below the room, which has exceeded the set temperature, decreases and the temperature drops. When the effect of the residual heat disappears, the temperature of the hot air also drops, and when the thermistor detects a predetermined temperature after subtracting the differential of the set temperature, the wind direction control plate 6 is rotated by a motor or the like to change it downward. Then,
In the region in front of the equipment where the temperature has dropped, in addition to the blowout temperature decreasing and the buoyancy decreasing, warm air with downward energy increased by the wind direction control plate 6 flows to a distance, and then gently again. It begins to be heated. In this way, even if the sequence is switched to the weak combustion sequence, the temperature of the living area under the room can be controlled more comfortably.

Effect of the Invention By switching to the weak combustion sequence, the air volume is reduced, the warm air temperature drops, and when it is detected that the warm air temperature has dropped to the specified temperature, the wind direction control plate turns downward from the horizontal direction. To switch. As a result, even with a small amount of air flow, warm air flows far over the floor surface, so that the living area on the floor surface in front of the appliance again rises in temperature and becomes a more comfortable heating space.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the warm air heater of the present invention, FIG. 2 is a sectional view of the same part, FIG. 3 is a vertical sectional view of a conventional example, and FIG. It is a side view which showed the band and the conventional and this invention. 6 ... Wind direction control plate, 14 ... Warm air outlet, 11, 12 ... Spring.

Claims (1)

[Claims] 1. A warm air heater having a wind direction control plate for varying the wind direction in the range from the horizontal direction to the front side of the appliance toward the floor at the hot air outlet, and the weak combustion reduces the hot air temperature and air volume. The hot air heater is characterized in that the wind direction control plate faces downward when it is detected that the warm air temperature has dropped to a predetermined temperature.