JPH0316574B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a method of controlling a heating device.

Conventional configuration and its problems Conventionally, in order to improve the indoor temperature distribution in a blower heating system, it is necessary to direct the airflow downward at a certain angle depending on the installation position, but when the heating load is large, the performance cannot be maintained. In order to do this, a large amount of air is required, and if the airflow is downward and in a single direction, the wind speed within the living area increases, giving the occupants a feeling of cold air. Furthermore, if the blowing temperature is increased in order to secure the heating capacity without increasing the air volume, the distance traveled by the air current becomes shorter, the stirring effect becomes insufficient, and the temperature distribution becomes extremely poor. In order to compensate for these contradictory drawbacks, the airflow is divided into multiple parts, directing only the amount of air required for indoor air agitation towards the bottom of the room, and the rest towards outside the living area, while ensuring the necessary heating capacity and improving the indoor temperature distribution. Measures are taken to keep it in good condition. However, in this case, since the air volume ratio of the branched flow was constant, if the blowing temperature changes due to on/off or capacity control, the distance the air flow reaches also changes, resulting in a weaker stirring effect or a feeling of cold air. Was.

Purpose of the invention The present invention solves such conventional problems,
The purpose is to improve comfort during heating.

That is, the purpose is to sufficiently agitate the indoor air and maintain a good indoor temperature distribution while preventing the feeling of cold air caused by the blown airflow.

Structure of the Invention In order to achieve this object, the present invention includes: a blowout temperature detecting means; a blowout airflow dividing means for dividing the blowoff airflow into a plurality of directions and setting a downward air volume ratio;
A control device is provided that changes the setting of the air volume ratio of the air outlet airflow dividing means based on the output of the air outlet temperature detection means, and when the air outlet temperature rises, the downward air volume ratio is increased and when the air outlet temperature falls, the air volume ratio is increased. , which lowers the downward air volume ratio.

With this configuration, when the blowout temperature rises, the reach becomes shorter due to buoyancy, so indoor air is sufficiently agitated by increasing the air volume ratio of the downward airflow. On the other hand, if the blowout temperature decreases, the buoyancy decreases and the reach distance increases more than necessary, so by lowering the air volume ratio of the downward airflow, it is possible to prevent the occupants from feeling cold air.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, 1 is a heating device main body, which has a heat exchanger 2, an air blower 3, etc. inside. The blow-off port 4 is provided with a damper 5 as a blow-off air flow dividing means and a thermistor 6 for detecting the blow-off temperature. Further, a step motor 7 for rotating the damper 5 is connected to the shaft 8.

FIG. 2 is a block diagram of the control circuit of the step motor 7, in which a thermistor 6, which detects the blowout temperature,
It is comprised of a step motor control circuit 9 that controls the rotation angle of the step motor 7 based on the output of the thermistor 6, and the step motor 7.

In the above configuration, the operation when heating operation is performed will be explained with reference to FIGS. 3 to 5.

FIG. 3 is a flow chart of the operation. first,
When the blowout temperature T is detected by the thermistor 6 at (10), T is converted into the rotation angle θ of the step motor 7 according to the relationship shown in FIG. 4 (11), and based on this value, the step motor control circuit 9 A signal is sent to the step motor 7 (12), the damper 5 is controlled to a predetermined angle, and the air volume ratio is set. FIG. 5 shows the relationship between the blowout temperature T and the air volume ratio (downward air volume/total air volume).
As the blowing temperature increases, the air volume ratio increases and the downward air volume increases, preventing the range from decreasing due to buoyancy and maintaining a good indoor temperature distribution. On the other hand, when the blowout temperature becomes low, the buoyancy decreases and the reach distance increases more than necessary, making the occupants feel cold, so the air volume ratio is lowered to reduce the downward air volume. In this case, since the blowing temperature is low, the reach distance is ensured and the indoor temperature distribution does not deteriorate.

Therefore, deterioration of the indoor temperature distribution due to a rise in the blowout temperature and the feeling of cold air when the temperature drops can be prevented, and a comfortable heated space can be achieved.

Effects of the Invention As described above, according to the present invention, in order to change the downward air volume ratio according to the blowing temperature without changing the total blowing air volume, the reachable distance of the downward airflow is constantly adjusted to stir indoor air. It is possible to set the air volume to a sufficient amount, and also to prevent the feeling of cold air caused by the blown air current.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
The figure is a block diagram of the control device that changes the setting of the air volume ratio, Figure 3 is a flowchart showing the same operation, Figure 4 is a diagram showing the relationship between the blowout temperature and the rotation angle of the step motor, FIG. 5 is a diagram showing the relationship between the blowout temperature and the air volume ratio. DESCRIPTION OF SYMBOLS 1...Heating device main body, 4...Air outlet, 5...Damper as a blow-out air flow dividing means, 6...Thermistor as a blow-out temperature detection means, 7...Step motor as a control device, 9...Control device as a step motor control circuit.

Claims (1)

[Claims] 1. A blowout temperature detection means, a blowout airflow diversion means that divides the blowout airflow into a plurality of directions and sets a downward air volume ratio, and an airflow ratio of the blowout airflow diversion means based on the output of the blowout temperature detection means. A control method for a heating device, characterized in that a control device for changing the temperature is provided, and when the blowout temperature rises, the downward airflow ratio is increased, and when the blowout temperature falls, the downward airflow ratio is lowered.