JPS61208466A - Hot air flow space heater - Google Patents

Abstract

PURPOSE:To prevent the combustion condition of the space heater from being changed even when a lower angle of a louver varies by controlling the rotational speed of a fan in linkage with the variation in the lower angle of a variable louver provided at a hot air flow blow-off port. CONSTITUTION:Fan control means 10 such as a variable resistor or the like controlling the rotational speed of a fan 5 operates in linkage with the variation in the louver angle of a louver 8. That is, the fan control means 10 is connected in series to a fan motor 11 so as to increase the rotational speed of the fan 5 in accordance with the increase in the louver angle and the resistance of a hot air flow blow-off port 6. When the louver angle is small, the resistance of the air flow blow-off port 6 is normal, and hence the rotational speed of the fan 5 is also normal. Thus, the quantity of air optimum for the combustion of a burner 3 flows thereinto. When the angle of the louver 8 is made larger, and the rotational speed of the fan 5 is varied greatly (when the louver angle is made larger, the variable resistance value becomes small, and the rotational speed increases), and the air-fuel ratio of the burner and the flame current value are constantly held at predetermined values.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a domestic hot air heater using gas combustion as a heat source.

Conventional technology In recent years, in order to improve the comfort of warm air heaters,
It is said that it is necessary to change the direction of the wind so that warm air can be distributed evenly throughout the living room.

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

FIG. 7, FIG. 8, and FIG. 9 show the Wt configuration of a conventional hot air heater.

In Figure 7, warm air 1 is sucked in through the suction port 2 of the main body case 1a by the rotation of the fan 5, heated in the combustion gas of the burner 3 and the combustion case 4, and then sent to the hot air outlet 6.
The hot air 7 is blown out from the hot air.

At this time, a variable louver 8 is provided at the hot air outlet 6.

The hot air outlet 6 configured as described above will be described below.

FIGS. 6 and 9 are cross-sectional views of the hot air outlet viewed from above. In FIG. 8, the louver 8 is in its normal state, and in FIG. 9, the angle of the louver 8 is changed.

Problems to be Solved by the Invention Figure 5 shows changes in various characteristics of the air warmer when the angle of the louver 8 is changed with the above configuration. If we take the louver angle on the horizontal axis and the air-fuel ratio (Pa g6 ), flame current value (01μA), fan rotation speed (Nrpm), and air volume (Qm3/m1n) on the vertical axis, we can see that the louver angle increases as the louver angle changes. In this case, since the fan rotation speed hardly changes, the air volume decreases due to the resistance of the louver 8, and as a result, the air volume to the burner 3 decreases, the air-fuel ratio decreases, and the flame current value changes significantly. Conventionally, there have been problems as described above.

It is an object of the present invention to solve the above problems and to prevent the combustion state from changing even when the louver angle changes.

Means for Solving the Problems The present invention is provided with a fan control means for controlling the rotational speed of the fan in conjunction with the variable louver of the variable louver provided at the hot air outlet.

Operation By operating the variable louver using the above means, the rotation speed of the fan changes at a constant rate. For example, if the variable louver is changed from a steady state to a wider wind direction, the air path resistance will increase, the air volume will decrease, and combustion will become unstable as a result. The fan control means increases the number of rotations of the fan so that the air volume can always be kept constant and combustion can be stabilized.

Example An embodiment of the present invention will be described below.

FIG. 1 is a sectional view of the hot air heater of the present invention, in which hot air 1 is sucked in through the suction port 2 of the main body case 1a by the rotation of the fan 5, and the burner 3 is combusted inside the combustion case 4. The hot air is mixed with gas and blown out from the hot air outlet 6 as hot air 7.

At this time, the hot air outlet 6 is provided with a variable louver 8 and a lever 9 that moves the variable louver to change the looper angle and guide the hot air in any direction. Reference numeral 10 denotes fan control means such as a variable resistor for controlling the rotation speed of the fan 5, which is linked to changes in the looper angle of the louver 8. That is, as shown in FIG. 3, the fan control means 10 is connected in series to the fan motor 11 so that as the louver angle increases and the resistance of the hot air outlet 6 increases, the rotation speed of the fan 5 increases.

According to the embodiment described above, since the resistance of the hot air outlet 6 is normal at the angle of the louver 8 shown in FIG.

Also, as shown in Fig. 6, when the angle of the louver 8 is changed as shown in Fig. 3, the resistance of the hot air outlet 6 becomes large, so the rotation speed of the fan 5 increases at the same time, (/I/ (When the bar angle is increased, the variable resistance value becomes smaller and the rotational speed increases.) The air-fuel ratio and flame current value of the burner 3 are always kept constant.

As described above, the present invention provides a hot air heater with a variable louver, which allows the fan rotation speed to be changed accordingly no matter how the air direction of the hot air outlet changes, so that a constant air volume is always maintained. This makes it possible to ensure stable combustion in the burner.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a hot air heater according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the hot air outlet, Fig. 3 is the same cross-sectional view as Fig. 2, and Fig. 4 is a cross-sectional view of the hot air outlet. The circuit diagram of the same fan motor, Figure 5 is a diagram of various characteristics of the looper angle when the conventional louver is variable, Figure 6
Figure 7 is a cross-sectional view of a conventional warm air heater; Figure 8 is a cross-sectional view from above when the four louvers are steady; Figure 9 is a diagram showing the characteristics of the present invention when the louvers are variable. It is a sectional view taken from the direction of time. 3...burner, 5...hot air outlet, 8...louver, 10...fan control means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 - Burner, 1---7 Ann 6--- *X air outlet 8---Louver 10''''-1 fan system armrest stage/(L Figure 2

Claims (1)

[Claims] a burner, a fan that converts combustion heat of the burner into hot air and sends combustion air for the burner, a hot air outlet having a louver, and a fan that is connected to a change in angle of the louver, and the fan that converts combustion heat of the burner into warm air and sends combustion air to the burner; A hot air heater comprising fan control means for increasing the number of rotations of the fan.