JPH04103959A - Warm air heating apparatus - Google Patents

Abstract

PURPOSE:To obtain comfortable warm air by the title apparatus, by a method wherein a deviation of room temperature change is found from a room temp. at the state of heating and another room temp. at the time when a definite time elapses after the start of the heating, and on the basis of the deviation thereof, an area of a warm air outlet is varied. CONSTITUTION:When a definite time elapses after the start of heating, a deviation-operating part 16 finds a deviation, En=T1-T0, of room temp. change, from a room temp. T0 at the start of heating and a room temp. T1 after the definite time. In an adaptation operation part 18a, the deviation En is inputted to a condition part of a control rules in a condition part storage part 17a, and an adaptation W is found, and by the W, weighting operation is carried out for the output part of the control rules in an output part storage part 17b, in a weighting operation part 18b. After that, functions of output part of control rules weighting are compounded in an gravity center-operating part 18c, and the centers of gravity thereof are found. These values becomes indications of heating capacities and outlet areas for the En, and the indications found are outputted in a control part 13. On the basis of these indications, the control part 13 actuates a variable means 7 for the outlet area through an actuator 8 and the opening area of a warm-air outlet 6 is preset. Within the range of maximum heating capacity, an output corresponding to output-difference between a room temp. detecting part 11 and a room temp.-presetting part 12 is outputted to a variable means 14 for combustion fuel and to a blower 5 and controls them.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot air heater such as a fan heater or an FF hot air fan.

Conventional technology Generally, this kind of hot air heater has a hot air outlet on the front of the main body, and the air from the blower installed on the back of the main body is converted into warm air using a heat source inside the main body, and then blown out from the warm air outlet. It looks like this.

Problems to be Solved by the Invention However, in the above-mentioned conventional hot air heater, the opening area of the hot air outlet is fixed, and there is a problem that comfortable heating cannot be obtained depending on the size of the room. Ta. In other words, since the opening area of the hot air outlet is constant, the amount of air blown increases or decreases with the amount of combustion depending on the room temperature, and the speed of hot air blowing changes. However, the blowing speed is uniquely determined by the opening area of the hot air outlet. The distance the warm air reached was constant. Therefore, if the room is small, the hot air will reach the corners of the room, providing comfortable heating, but as the room gets larger, the proportion of the hot air reaching the room will decrease, and only the area near the main unit will be warm, leaving the corners of the room warm. There was an issue where the heating could not reach all the way.

The present invention was made in view of these points, and provides comfortable heating by automatically changing the hot air blowing area according to the size of the room and changing the hot air blowing speed. It is intended for this purpose.

Means for Solving the Problems In order to achieve the above object, the present invention includes a deviation calculation section that calculates a room temperature change deviation from the room temperature at the start of heating and the room temperature after a certain period of time from the start of heating, and a deviation calculating section that calculates a room temperature change deviation from the room temperature at the start of heating and the room temperature after a certain period of time after heating starts, and a hot air blower based on the room temperature change deviation. This configuration includes a control section that changes the area of the outlet.

Function The present invention uses the above configuration to determine the size of the room based on the room temperature variation deviation, and automatically changes the hot air outlet area according to the size of the room. The blowing speed will increase or decrease. Therefore, depending on the size of the room, the distance that the hot air reaches is almost constant, making it possible to provide comfortable heating.

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

First, an example of a hot-air heater will be explained using Fig. 4. 1 is the heater body, 2 is a combustion section provided inside the heater body 1, and the fuel is vaporized and mixed with combustion air. An evaporative burner is used to combust.

3 is a fuel pump that supplies fuel to the combustion section 2; 4 is a burner fan that supplies combustion air to the combustion section 2; 5 is a burner fan that uses the heat of the combustion gas generated in the combustion section 2 as hot air to be installed at the front of the main body. The blower 7 which blows out the warm air from the hot air outlet 6 is an outlet area variable means provided in the hot air outlet 6, and is driven up and down by a driver 8 such as an electromagnetic plunger.

9 is a control device that controls the fuel pump 3, burner fan 4,
The air blower 5 is driven to control the heating capacity consisting of combustion amount, hot air volume, etc., and in conjunction with this, the driving body 8 of the outlet area variable means 7 is driven to change the outlet area.

FIG. 1 is a block diagram of the above control device, where 11 is a room temperature detection section, 12 is a room temperature setting section, and 13 is an input of the outputs from the room temperature detection and setting sections 11 and 12, and the combustion amount and temperature are determined by the output difference. The fuel pump 3 is a combustion control section that sets the air volume.
, a combustion amount variable means 14 composed of a burner fan 4,
The blower 5 is driven. Reference numeral 16 denotes a deviation calculation unit, which receives a temperature T obtained from the room temperature detection unit 11 at the time of starting heating, and a temperature T obtained after a certain period of time from the start of heating.

From this, the room temperature change deviation En is calculated. Reference numeral 17 denotes a control rule storage section that stores a control rule that uses control variables to describe the relationship between the room temperature change deviation En and the heating capacity and air outlet area instruction to the output correction section, which will be described later. Here, as an example of a control rule, [If the room temperature change deviation En is large (condition part), the heating capacity instruction is small (the air outlet area should be large (output part) j, etc.) is written in the IF-THEN format, It becomes as shown in the first equation below.

1st formula IFEn=small THEN Q-large 8-small lPEn=normal TI(EN Q-normal ＾-
Normal IF En-Large TI (F!, N n=
Small 8-Big Q: Heating capacity (kcal/h)
A=Blowout opening area (cJ) Here, the control variables such as "large", "normal J" or "small" are defined by the membership function shown in FIG.

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

Next, 18 is a control inference section, and the room temperature change deviation En and the control 8 are the room temperature detection section 11, the deviation calculation section 16, and the condition section storage section 17.
A suitability calculation unit 18a calculates the suitability of the room temperature change deviation En to the condition part of the control rule from a, and weights the output part of the control rule using the determined suitability and the output signal of the output unit storage unit 17b. The weighting is performed by the calculation unit 18b, and the weighting is performed by the calculation unit 1.
A center of gravity calculation section 18c calculates the maximum heating capacity and outlet area from the output section of the control rule weighted from 8b.
It consists of Note that the control section 13 is the control inference section 18.
The combustion amount variable means 14 within the range of the maximum heating capacity instruction from
and controls the blower 5. Furthermore, the control rule storage section 17 and the control inference section 18 constitute a control section 15 that changes the heating capacity and the area of the outlet entrance depending on the size of the room.

The operation of the above configuration will be explained. First, when the start of operation is confirmed, the control section 13 starts combustion according to a predetermined program. Next, when combustion starts, the room temperature and set temperature are detected, and the combustion amount is calculated based on the output difference, and the output is output to the combustion amount variable means 14 and the blower 5 to control the amount of combustion and hot air. 0 Normally when heating starts, the room temperature is Maximum heating capacity (maximum combustion/warm air volume) as there is a large difference between
Instructs to start heating. Furthermore, since there is no output from the control inference section 18 at this point, the control section 13 starts heating at the preset maximum heating capacity and outlet area. As shown in the flowchart of Figure 2, P1~
This is the operation of P.

Next, when a certain period of time (for example, 10 minutes) has elapsed after the start of heating, the deviation calculation unit 16 calculates a room temperature change deviation En (En=T, -T,
). In the flowchart of FIG. 2, the operations are P, .about.P. Then, the suitability calculation section 18a inputs the room temperature change deviation En into the condition section of the control rule in the condition section storage section 17a to obtain the suitability W. In the flowchart in Figure 2, P
l. become.

Next, the calculated degree of fitness W is weighted by the calculation unit 18b, and the weighting calculation is performed on the output part of the control rule of the output part storage part 17b.
In the flowchart of FIG. 2, it becomes P.

Next, the center of gravity calculation unit 18c synthesizes the functions of the output part of the weighted control rule and determines the center of gravity. This becomes the heating capacity and outlet area instruction for the input room temperature change deviation En, and the obtained maximum heating capacity and outlet area instruction are output to the control unit 13. First, the outlet area variable means 7 is driven to set the opening area of the hot air outlet 6. Then, within the above-mentioned maximum heating capacity range, an output corresponding to the output difference from the room temperature detecting section 11 and the room temperature setting section 12 is outputted to the combustion amount variable means 14 and the blower 5 to control them.

That is, for example, if the room temperature change deviation after a certain period of time from the start of heating is 6 degrees as shown in Fig. 3 (A), the maximum heating capacity and outlet area indication are M and L in Fig. 3 (B) and S in Fig. 3 (C).
and M. And Min-M
Inferences based on the ax method and the center of gravity method are added, and the maximum heating capacity is specified to be 2800 kcal/h, and the outlet area is 115 d.

In the above embodiment, the maximum heating capacity and the air outlet area are set only based on the room temperature change deviation after a certain period of time after the start of heating. However, since the room temperature change deviation varies depending on the temperature at the time of starting heating, If the maximum heating capacity and outlet area are set based on the temperature and the room temperature change deviation after a certain period of time from the start of heating, it becomes possible to switch the heating capacity more accurately.

Effects of the Invention As is clear from the description of the embodiments, according to the present invention, the hot air outlet area automatically changes depending on the size of the room, so the hot air blowing speed also increases or decreases accordingly. Warm air reaches a distance commensurate with the size of the space, allowing for efficient and comfortable heating. Also, since the air outlet area is changed by performing inference processing,
The air outlet area can be precisely adjusted to suit the size of the room, allowing for more efficient heating.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control device for a warm air heater in an embodiment of the present invention, FIG. 2 is a flowchart showing its operation, FIG. 3 is a diagram showing the membership function, and FIG.
The figure is a cross-sectional view of the hot air heater. l... Heater main body, 2... Combustion part, End... Blower, 6... Warm air outlet, 7...
...Air outlet area variable means, 11... Room temperature detection section, 12... Room temperature setting section, 13...
Combustion control unit, 14... Combustion amount variable means, 15.
... Control section, 16 ... Deviation calculation section, 17
. . . Control rule storage section, 18 . . . Control inference section. Name of agent: Patent attorney Shigetaka Awano 1 person 15-1-
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Claims (2)

[Claims] (1) a main body having a combustion section; a blower that uses heat generated in the combustion section to blow out warm air from a hot air outlet of the main body; and an outlet area variable means for varying the area of the hot air outlet;
a deviation calculation unit that calculates a room temperature change deviation from the room temperature at the start of heating and the room temperature after a certain time after the start of heating; and based on the output from this deviation calculation unit, the outlet area variable means is driven to determine the area of the hot air outlet. A hot air heater consisting of a control unit that changes the temperature. (2) The control unit performs inference processing by referring to a control rule storage unit that stores at least the relationship between the room temperature change deviation and the air outlet area as a control rule, and at least the room temperature change deviation and the control rule in the control rule storage unit. 2. The warm air heater according to claim 1, further comprising a control inference section that determines the area of the front and front air outlets.