JP2589853B2 - Hot air heater control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hot air heater that changes a blowing angle of hot air up or down in accordance with hot air or a calorific value.

2. Description of the Related Art A conventional control device for a warm air heater of this type has been disclosed by the present applicant in Japanese Patent Application No. 63-118537, and is based on the difference between room temperature and set temperature. And the louver angle of the hot air outlet is changed up and down in conjunction with it.

Problems to be Solved by the Invention According to the control device for a hot air heater, when the hot air or the calorific value is strong, the hot air blowing direction is made substantially horizontal, and as it becomes weak, the hot air blowing direction is gradually lowered. This reduces the draft of the warm air and improves the temperature distribution in the room, increasing the comfortable space.

However, the control device of the hot air heater sets the louver angle without considering the room temperature itself during heating, even though the difference between the room temperature and the set temperature is considered. However, the draft of the warm air is generally large when the room temperature itself is low, and becomes weaker as the temperature becomes higher because the difference between the room temperature and the warm air temperature is large. However, the control device for the warm air heater does not consider this point. In other words, the louver angle is set only by the difference between the room temperature and the set temperature regardless of the temperature at the time of heating.For example, it is better to make the downward louver angle more downward in the case of strong combustion and high temperature air flow. Although the comfortable space can be expanded, the same louver angle, for example, even when the room temperature is 8 ° C. or 15 ° C., becomes the same louver angle, and there is a limit in expanding the comfortable space.

The present invention has been made in view of such a point, and an object of the present invention is to make a comfortable space wider.

Means for Solving the Problems In order to achieve the above object, the present invention provides a louver that changes a blowing angle of hot air, and either or both of a combustion amount and a hot air amount based on both outputs from a room temperature detecting unit and a room temperature setting unit. And a deviation calculator for calculating the temperature deviation based on the outputs of the room temperature detector and the room temperature setting unit, and the relationship between the room temperature and the temperature deviation and the louver angle manipulated variable output to the louver is stored as a control rule. And a control inference unit that determines the louver angle operation amount by performing an inference process by referring to the control rule of the control rule storage unit based on the room temperature and the calculated temperature deviation value. It is composed.

According to the present invention, the louver angle is determined by the output difference between the room temperature detecting section and the room temperature setting section by the above configuration.
At that time, the louver angle is corrected by the room temperature itself detected by the room temperature detecting unit. For example, even in the case of the same strong combustion and strong hot air, when the room temperature is 8 ° C., the angle becomes lower than at 15 ° C. . That is, the lower the room temperature and the stronger the hot air draft, the lower the blowing angle of the warm air can be, and the more comfortable the room is.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, an example of a warm air heater will be described with reference to FIG. 5. Reference numeral 1 denotes a heater main body, and 2 denotes a heat source section provided in the heater main body 1, which vaporizes fuel and mixes it with combustion air. An evaporative burner that burns by burning is used. Reference numeral 3 denotes a fuel pump for supplying fuel to the heat source 2, reference numeral 4 denotes a burner fan for supplying combustion air to the heat source 2, and reference numeral 5 denotes hot air using heat of the combustion gas or the like generated in the heat source 2 as hot air. A convection fan 7 which blows out from the hot air outlet 6 is a louver provided in the hot air outlet 6 for changing the blowing angle of hot air, and the louver angle is changed by louver angle changing means 8 such as a stepping motor. It has become. Reference numeral 9 denotes a control device which drives the fuel pump 3, the burner fan 4, and the convection fan 5 to control the amount of combustion and the amount of hot air, and drives the louver angle variable means 8 in conjunction therewith to change the louver angle. It is.

FIG. 1 is a block diagram of the control device, in which 11 is a room temperature detecting unit, 12 is a room temperature setting unit, and 13 is the room temperature detecting and setting unit.
A control unit for inputting the output from the heat pump 11 and 12 and setting the amount of combustion and the amount of hot air according to the output; a combustion amount variable means 14 comprising the fuel pump 3 and the burner fan 4;
Is driven by the hot air flow rate varying means 15 composed of. Reference numeral 16 denotes a deviation calculation unit that calculates a temperature deviation En from the output (room temperature value To) from the room temperature detection unit 11 and the output from the room temperature setting unit 12. Reference numeral 17 denotes a control rule storage unit, which stores a control rule in which the relationship between the room temperature value To and the temperature deviation En and the amount of operation on the louver angle variable means 8 is described using control variables. Here, as an example of a control rule, if if the room temperature is a little cold and the temperature deviation En is large (condition part), the amount of bias of the louver angle variable means 8 is slightly closed (output part). It is described in the form shown in Table 1 below.

Here, the control variables "slightly cold", "large" or "slightly close" are defined by the membership function shown in FIG.

The control rule storage unit 17 includes a condition unit storage unit 17a that stores the conditions of the control rule, and an output unit storage unit 17b that stores the output unit of the control rule.

Next, reference numeral 18 denotes a control inference unit for inferring from the room temperature To and the temperature deviation En and the control rules in the control rule storage unit 17 to determine and output the amount of bias of the louver angle variable unit 8. Here, the control inference unit 18 includes a room temperature detection unit 11, a deviation calculation unit 16, and a condition storage unit 17.
a fitness calculating unit 18a for calculating the fitness w of the room temperature value To and the temperature deviation En to the condition part of the control rule from a and the determined fitness w
And a weight calculating unit 18b for weighting the output unit of the control rule with the output of the output storage unit 17b. And a center-of-gravity calculation unit 18c determined by

Next, the operation of the above configuration will be described.
First, when the start of operation is confirmed, the control unit 13 starts combustion according to a predetermined program. Next, when the combustion is confirmed, the room temperature and the set temperature are detected, the combustion amount is calculated based on the output difference, and the combustion amount varying means 14 and the hot air amount varying means are calculated.
Output to 15 to control combustion and hot air flow. The operation of P1, P2, P3, and P4 is shown in the flowchart of FIG. Next, the set temperature Ts is calculated by the room temperature setting unit 12, the room temperature To is calculated from the room temperature detected by the room temperature detection unit 11, and the temperature deviation En (En = Ts−To) is obtained from the result. The operation of P5, P6, and P7 is shown in the flowchart of FIG. The room temperature To thus obtained is represented by t, and the temperature deviation is represented by e. Next, the adaptability calculating unit 18a compares the room temperature To = t and the temperature deviation En = e with reference to the condition part (the membership functions A and B in Table 1 and FIG. 3) of the control rule of the condition part storage unit 17a. Then, a fitness w is obtained. For example, a vertical line is drawn at t on the horizontal axis (room temperature) in FIG. 3 (A), and the intersection with each function is the degree of conformity w to room temperature t. Here, the fitness wt1 for the cold function, the fitness wt2 for the slightly cold function
become. Also for the temperature deviation, similarly to the above-mentioned room temperature, the degree of conformity we1 to the large function and the degree w of the small function
e2. The above results are shown in Table 2 by applying them to Table 1.

In practice, the smaller one (min method) is adopted as the fitness w. For example, if the magnitude relationship between the fitness degree wt1 for coldness and the fitness degree we1 for largeness is wt1> we1, then we1 is the membership function of the output unit or the fitness degree for closing. In the flowchart of FIG. Next, a weighting calculation is performed by the weighting calculation unit 18b with reference to the output unit (the membership function C in Tables 1 and 2 and FIG. 3) of the control rule in the output unit storage unit 17b. It is assumed that the result is as shown in Table 3.

 P9 in the flowchart of FIG.

Next, the center-of-gravity calculating unit 18c combines the functions of the output parts of the weighted control rules (MAX method), and obtains the center of gravity (center-of-gravity method). This is the amount of bias Fw of the louver variable means 8 with respect to the input room temperature To and temperature deviation En. The obtained bias amount is output. These are P10 and P11 in the flowchart of FIG.
The results are shown in FIG.

Thus, periodically based on the room temperature To and the temperature deviation En,
The above calculation is repeated to find the optimum louver angle. Therefore, for example, if the room temperature To is 8 ° C. shown in FIG. 3A and the temperature deviation is 0.9 deg. Shown in FIG. 3B, the louver angle is 28 degrees (with respect to the horizontal line) according to the above-described calculation. The downward angle is 28 degrees). If the temperature deviation is the same, the louver angle is the same as the room temperature decreases (normal → slightly cold → cold) as shown in the control rules in Table 1,
The above tendency is the same tendency (different in degree) regardless of the magnitude of the temperature deviation. Also, if the room temperature is the same, as the temperature deviation becomes smaller (very large → large → small → nearly zero → negatively small), the louver angle is the same or the rule is closed. To varying degrees). In this way, the louver angle is determined continuously while maintaining the above control rules with respect to changes in room temperature and temperature deviation.

Therefore, for example, even if the predetermined laver angle of strong combustion / hot air is 13 degrees (downward angle with respect to the horizontal line is 13 degrees), the room temperature To is low and the hot air draft is relatively strong. In this case, the warm air is blown downward more than when the warm air draft is weak, so that the warm air reaches farther and the comfortable space spreads.

Next, as the heating proceeds, when the difference between the room temperature and the set temperature decreases, the amount of combustion and the amount of hot air decrease accordingly, and the louver 7 also performs heating by inclining downward. Same as -118573, heating in optimal condition according to heating capacity.

As described above, according to the present invention, according to the present invention, the louver angle is set in consideration of not only the difference between the room temperature and the set temperature but also the room temperature itself. When the draft becomes relatively strong, the warm air can be blown downward, so that a comfortable space can be further expanded and comfortable heating can be obtained. In particular, since the setting of the louver angle is inferentially controlled, it is finely controlled and matches the user's sense.
Even more comfortable heating can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a hot air heater in one embodiment of the present invention, FIG. 2 is a flowchart showing its operation, FIG. 3 is a diagram showing the membership function, and FIG. FIG. 5 is a cross-sectional view of the hot air heater, showing the calculation result of the center of gravity calculation means. 7 Louver, 8 Louver angle variable means, 11 Room temperature detecting unit, 12 Room temperature setting unit, 13 Control unit, 14 Combustion amount variable unit, 15 Hot air amount variable unit, 17 ... A control rule storage unit, 18 a control inference unit.

Continued on the front page (72) Inventor Shinji Kushida 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. ) Inventor Tadanori Haneda 1006 Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-33562 (JP, A) JP-A-4-39570 (JP, A)

Claims (1)

(57) [Claims] A louver for changing a blowing angle of hot air; a control unit for setting one or both of a combustion amount and a hot air amount based on both outputs from a room temperature detecting unit and a room temperature setting unit; A deviation calculating unit for calculating a temperature deviation based on outputs from the control unit and a room temperature setting unit; a control rule storage unit storing, as a control rule, a relationship between the room temperature and the temperature deviation value and the louver angle operation amount output to the louver; A control device for a warm air heater, comprising: a control inference unit that performs inference processing by referring to the control rule in the control rule storage unit based on the obtained temperature deviation value and determines the louver angle operation amount.