JPH0484037A - Device for controlling heating capacity in heating apparatus - Google Patents

Abstract

PURPOSE:To enable automatically shifting the heating capacity according to the heating load as a step in enhancing the usability by a method wherein the maximum heating capacity is decided by inferential processing from a deviation in the change of the room temperature and rules of control in a control-rules storage part as a reference. CONSTITUTION:A control part 13 starts heating at a maximum heating capacity. When a specific period of time has elapsed after the start of heating, a deviation calculation part 16 obtains a deviation in the change of room temperature from the room temperature at the start of the heating and the room temperature after the specified period of time. A goodness-of-fit calculation part 18a obtains the goodness of fit by inputting the deviation in the change of room temperature to a rules-of-control condition part of a condition-storage part 17a. A weighting calculation part 18b obtains a weighted goodness of fit for a rules-of- control output part of an output-storage part 17b. A weighted core calculation part 18c obtains the weighted core from coincidence of functions at the rules-of-control output part. This weighted core forms directions for the heating capacity corresponding to the deviation in the change of room temperature inputted, and the directions for the maximum heating capacity thus obtained is outputted to the control part 13. The control part 13 produces an output corresponding to the differential output between a room-temperature detection part 11 and a room temperature-setting part 12 within the maximum heating capacity and outputs it to a degree-of-combustion varying means 14 and a heating-air volume-varying means 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating capacity control device for a heater.

BACKGROUND OF THE INVENTION Conventionally, this type of heating capacity control device has been designed to change the heating capacity (combustion amount) within the range of the maximum heating capacity set for the device. However, with such a device, when the heating load is small, such as when the room is small, excessive heating capacity is used to heat the room, resulting in poor heating sensation and poor economic efficiency. Therefore, recently we have started to see devices that allow the maximum heating capacity to be changed depending on the size of the room. This was equipped with a heating capacity selector switch, and the user operated the heating capacity selector switch to change the heating capacity according to the size of the room.

Problems to be Solved by the Invention However, with the above-mentioned conventional heating capacity control device, the user has to operate the heating capacity switching switch each time, which is troublesome. It was not possible to increase the heating capacity too much (if it were increased, a heating capacity changeover switch would be required), and the heating capacity could not be changed in detail. Furthermore, if the user does not operate the heating capacity selection switch, the heating will end up being heated with excessive heating capacity, making it impossible to improve the feeling of heating or the economy.

The present invention has been made in view of these points, and it improves usability by automatically switching the heating capacity according to the heating load, and the switching of the heating capacity is performed finely.
The purpose is to improve heating efficiency and economy.

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 at least the room temperature change deviation and the maximum heating capacity. a control rule storage section that stores the relationship between the following as a control rule; and a control inference section that performs inference processing by referring to at least the room temperature change deviation and the control rule in the control rule storage section to determine the maximum heating capacity. be.

Effect of the Invention With the above configuration, the present invention determines the heating load based on at least the room temperature change deviation and automatically switches the heating capacity to the heating capacity according to the heating load, so the user does not have to take the trouble to switch the heating capacity. The switching of the heating capacity is performed by inference processing, so it can be done in detail, and the heating capacity can be switched to the optimum one for the size of the room. Furthermore, since the heating capacity is automatically switched as described above, there is no heating caused by excessive heating capacity due to forgetting to switch.

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 heat source 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 heat source section 2; 4 is a burner fan that supplies combustion air to the heat source section 2; 5 is a burner fan that supplies combustion gas and other heat generated in the heat source section 2 to the front surface of the main body as hot air; A convection fan 7 that blows out hot air from the hot air outlet 6 is a louver provided at the hot air outlet 6 to change the blowing angle of the hot air, and a louver angle variable means 8 such as a stepping motor is used.
The louver angle is changed by Reference numeral 9 denotes a control device that drives the fuel pump 3, burner fan 4, and convection fan 5 to control the heating capacity consisting of the combustion amount, lA air volume, etc., and also drives the louver angle variable means 8 in conjunction with this. The louver angle can be changed by changing the louver angle.

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 control section that sets the air volume drives the combustion amount variable means 14 made up of the fuel pump 3 and the burner fan 4, and the hot air amount variable means 15 made up of the convection fan 5.

Reference numeral 16 denotes a deviation calculation unit which calculates a room temperature change deviation En from the temperature T0 obtained from the room temperature detection unit 11 at the start of heating and the temperature T obtained after a certain period of time from the start of heating. Reference numeral 17 denotes a control rule storage section that stores a control rule that describes the relationship between the room temperature change deviation En and a heating capacity instruction to the output correction section, which will be described later, using an I control variable. Here, an example of a control rule is ``If the room temperature change deviation En is large (condition part)
IP-T such as "Please reduce the heating capacity instruction (output section)"
I (written in EN format, as shown in Part 1 below.

1st formula IFEn=small THEN Q=large IFEn
- Normal THEN Q = Normal IFEn - Large THEN Q = Small Q: Heating capacity (kcal/h) Here, the control variable "large", "normal" or "small" is the member knob function shown in Figure 3. defined.

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 section storage section 17b that stores the output section of the control rule.

Next, reference numeral 18 denotes a control inference section that performs inference from the room temperature change deviation En and the control rules in the control rule storage section 17 to determine and output the maximum heating capacity. Here, the control inference unit 18 includes a compatibility calculation unit 18a which calculates the compatibility of the room temperature change deviation En with the condition part of the control rule from the room temperature detection unit 11, the deviation calculation unit 16, and the condition part storage unit 17a; Degree and output section storage section 1
A weighting calculation unit 18b weights the output part of the control rule with the output signal of the control rule 7b, and a center of gravity calculation unit calculates the maximum heating capacity from the output part of the weighted control rule by calculating the center of gravity. It consists of 18c. The control section 13 controls the combustion amount variable means 14 and the hot air amount variable means 15 within the range of the maximum heating capacity instruction from the control reasoning section 18.

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 is started, the room temperature and set temperature are detected, and the amount of combustion is calculated based on the output difference between them, and the amount is outputted to the combustion amount variable means 14 and the hot air amount variable means 15 to control combustion and the amount of hot air. Normally, when heating starts, there is a large difference between the room temperature and the set temperature, so the system instructs to start heating at maximum heating capacity (maximum combustion/warm air volume). Moreover, 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. As shown in the flowchart of Figure 2, P1 to P
This is the 6th action.

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, -To) from the room temperature T0 at the start of heating and the room temperature T after a certain period of time.
seek. 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 of Figure 2, Pl
. become.

Next, the calculated degree of suitability W is weighted by the calculation section 18b, and the weighting calculation is performed on the output section of the control rule in the output section storage section 17b.

In the flowchart of FIG. 2, it becomes Pl+.

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 instruction for the input room temperature change deviation En, and the obtained maximum heating capacity instruction is output to the control unit 13. This is P+z in the flowchart of FIG.

Based on this maximum heating capacity instruction, the control unit 13 outputs an output corresponding to the output difference from the room temperature detection unit 11 and the room temperature setting unit 12 to the combustion amount variable means 14 and the warm air amount variable means 15 within this maximum heating capacity range. You will be able to control these.

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 instruction will be selected from M and L in FIG. 3(B).

Then, inferences based on the Min-Max method and the center of gravity method are added, and the maximum heating capacity is specified as 2800 kcal/h.

In the above embodiment, the maximum heating capacity was set only based on the room temperature change deviation after a certain period of time after the start of heating. However, since the amount of room temperature change deviation varies depending on the temperature at the time of starting heating, the temperature at the time of starting heating and the start of heating If the maximum heating capacity is set based on the room temperature change deviation after a certain period of time, 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 maximum heating capacity is automatically switched depending on the heating load such as the size of the room, so it is easy to use and reduces the feeling of heating due to forgetting to switch. This also eliminates the problem of poor economic efficiency. In addition, since the heating capacity is switched through inference processing, it is possible to precisely switch to the maximum heating capacity that is optimal for the size of the room, and efficient heating is possible.

[Brief explanation of the drawing]

FIG. 1 is a bronc 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 Menhersimp function, and FIG.
The figure is a cross-sectional view of the hot air heater. 11... Room temperature detection unit, 12... Room temperature setting unit, 13... Control unit, 14... Combustion amount variable means, 15...・Warm air volume variable means, 16・
... Deviation calculation section, 17 ... Control rule storage section, 18 ... Control inference section, 19 ... Output correction section. Name of agent Patent attorney Shigetaka Awano Haka1 person first figure Skin5i1shi1doMennogu - Shiride Sekiune (B)4Ki'fto

Claims (1)

[Claims] a deviation calculation unit that calculates a room temperature change deviation from the room temperature at the start of heating and the room temperature a certain time after the heating start; a control rule storage unit that stores at least the relationship between the room temperature change deviation and the maximum heating capacity as a control rule; A heating capacity control device for a heater, comprising a control inference unit that performs inference processing with reference to a change deviation and a control rule in the control rule storage unit to determine the maximum heating capacity.