JPH04359734A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To enable an air conditioning operation in which an output range of air conditioning is automatically varied in response to an air conditioning load and an air conditioning operation in which a range of air conditioning output is set in compliance with a request of a user to be freely selected and to improve a convenience in use. CONSTITUTION:A micro-computer 14 calculates a load of air conditioning after the first air conditioning output control means is selected by a mat-number selection switch 7 and then controls an air conditioning output within a range of air conditioning output suitable for the calculated value. When the second air conditioning output control means is selected by the mat-number selection switch 7, the air conditioning output is controlled within the air conditioning output range corresponding to the manual operation.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is used in air conditioners such as air conditioners, hot air heaters, dehumidifiers, humidifiers, etc., and compares detected values such as temperature and humidity with set values, and uses the results of the comparison. The present invention relates to a control device for an air conditioner that controls air conditioning outputs such as cooling, heating, dehumidification, and humidification based on the air conditioner.

0002

[Prior Art] Conventionally, for example, in hot air heaters,
As disclosed in Publication No. 3-315857, at the beginning of operation, the combustion amount in the burner is controlled to the maximum so that the room temperature quickly rises, and once the room temperature approaches the set temperature, the maximum combustion is controlled. The device is equipped with a control device that can maintain the room temperature near the set temperature by controlling the amount of combustion according to the deviation between the room temperature and the set temperature while limiting the amount of combustion to the maximum amount set by the user.

0003

[Problem to be Solved by the Invention] However, in the above-mentioned hot air heater control device, if the maximum combustion amount set by the user is not set appropriately for the heating load, the heating output may be over or under. There was a concern that this would cause discomfort to the user and waste fuel.

[0004]Of course, this problem can be solved by calculating the size of the heating load, automatically setting the heating output range according to the calculated value, and controlling the heating output within that range. However, depending on the user, the noise value changes as the heating output range changes, which can be annoying to the user, and sometimes during nighttime operation, heating output control within a fixed heating output range may be abandoned. There was something difficult.

The present invention has been made in view of the above-mentioned facts, and provides an air conditioning operation in which the air conditioning output range is automatically changed according to the air conditioning load, and an air conditioning system in which the air conditioning output range is set according to the user's request. The purpose is to improve usability by allowing users to choose between driving and driving.

[0006]

[Means for Solving the Problems] The present invention compares detected values such as temperature and humidity with set values, and controls air conditioning output such as cooling, heating, and dehumidification based on the comparison results. A first air conditioning output control means that calculates the size of the load and controls the air conditioning output within an air conditioning output range suitable for the calculated value, and a second air conditioning output control means that controls the air conditioning output within an air conditioning output range that corresponds to the manual operation. air conditioning output control means, and a first or second air conditioning output control means.
The configuration includes a selection means for selecting one of the air conditioning output control means.

[0007]

[Operation] With this configuration, it is possible to freely select between an air conditioning operation in which the air conditioning output range is automatically changed according to the air conditioning load, and an air conditioning operation in an air conditioning output range that meets the user's needs.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.

FIG. 4 shows a hot air heater 1 to which the present invention is applied. A blower fan 17 is provided on the back of the hot air heater 1 having a built-in burner 2, and a hot air outlet is provided on the front. 4 is provided, and an operation panel 5 is provided on the upper surface of the front side.

As shown in FIG. 5, the operation panel 5 includes an operation switch 6 that alternately turns on and off by repeated pressing, a tact type tatami selection switch 7 that turns on when operated, and a seesaw type selection switch 7. It includes a temperature setting switch 8 and a display 9. In addition, the display 9 has four lamps 10A.
An output display section 10 in which 10D to 10D are arranged horizontally, and a temperature display section 11 consisting of a set temperature display section 11A and a room temperature display section 11B are provided.

FIG. 1 shows an example of a control device 12 for a warm air heater 1, in which an operation switch 6, a tatami area selection switch 7, a temperature setting switch 8, and a room temperature sensor 13 such as a thermistor are connected to an A/D Converter and non-volatile memory (EEPRO
M) is connected to the input side of a microcomputer (hereinafter referred to as microcomputer) 14. Further, on the output side of the microcomputer 14, an electric heater HT, a spark plug IG,
fuel pump 15, burner fan 16, warm air fan 17,
An output display section 10 and a temperature display section 11 are connected. 18 is a rotation speed detector of the burner fan 16, and a rotation speed signal of the rotation speed detector 18 is inputted to the microcomputer 14.

The microcomputer 14 sets the heating output (combustion amount) range in the following manner based on instructions from the tatami area selection switch 7 (see FIG. 6).

[0013] At the time of initial use (when the power is turned on), the output display section 1
The 0 tatami fuzzy lamp 10A lights up, the heating output range is automatically set according to the calculated heating load, and the tatami fuzzy control mode is set to control the heating output within that range. Then, when you press the tatami number selection switch 7 once, the fuzzy lamp 10A goes out and the 10 tatami lamp 10B turns off.
lights up. In this case, a manual selection control mode is used in which the heating output is controlled within a range of 3200 kcal/h to 1600 kcal/h, which is suitable for a 10 tatami room.

[0014] When the number of tatami selection switch 7 is pressed again, the number of tatami mats is 8.
The tatami lamp 10C is turned on (the 10 tatami lamp 10B is turned off), and a manual selection control mode is entered in which the heating output changes from 2700 to 1200 kcal/h. Furthermore, when you press the tatami number selection switch 7 again, the 6 tatami lamp 10D lights up (8
Tatami lamp 10C goes out), heating output is 2000~90
It becomes a manual selection control mode that changes at 0kcal/h. Then, if you press the number of tatami selection switch 7 again,
Return to fuzzy control mode.

When the operation switch 6 is turned on while the tatami fuzzy control mode is selected, the microcomputer 14
performs the following combustion control based on the combustion program (see FIGS. 2, 3, and 7).

First, the electric heater HT is energized, and the burner 2 is turned on.
Preheat the vaporizer. When preheating of the burner 2 is completed, the ignition plug IG and burner fan 16 are activated to pre-purge the burner 2, and then the fuel pump 15 and hot air fan 17 are activated to start combustion and burn the indoor air. It is heated with gas and discharged as warm air into the room from the hot air outlet 4.

Since the room temperature is low at the beginning of operation, the heating output is set to the maximum output of 3200 kcal/h. Then, the fuel pump 15 is frequency-controlled and the burner fan 16 is controlled in rotational speed so as to obtain this output. Further, the phase of the warm air fan 17 is controlled so that the amount of hot air commensurate with this heating output can be obtained.

The microcomputer 14 calculates the size of the heating load by fuzzy reasoning during this forced strong combustion. First, the room temperature Ti at the start of heating operation detected by the room temperature sensor 13
remember. Further, the room temperature change range ΔT for a certain period of time (for example, 5 minutes) after the completion of preheating (ignition) is determined and stored.

When the initial room temperature Ti and the room temperature change width ΔT are determined in this manner, the microcomputer 14 determines the respective grades of the membership functions shown in FIGS. 8 and 9 from these values. For example, when the initial room temperature Ti is 2.5° C., in FIG. 8, the grade of Z is 0.5, the grade of NS is 0.5, and all other grades are 0. Further, if the room temperature change width ΔT is 4 degrees, the grade of Z is 1 in FIG. 9, and all other grades are 0.

The grade value of the membership function of the initial room temperature Ti and the grade value of the membership function of the room temperature change width ΔT described above are applied to three lookup tables (FIGS. 11 to 13) stored in the microcomputer 14. . Also, Z, PM and NM written above each table
As will be described later, the grade value of the membership function (see FIG. 10) regarding the rotation speed of the burner fan 16 when the temperature detected by the room temperature sensor 13 is stabilized is substituted.

[0021] Since the room temperature is unstable at the beginning of operation,
Temporarily it is treated as Z=1, PM=0, and NM=0, and only the lookup table of FIG. 11 is used. In this case, for the initial room temperature Ti, Z=0.5, NS=
0.5 holds true, and for the room temperature change width ΔT, only Z=1 holds true (the others are 0), so when the heating load is calculated based on the weighting rule of fuzzy inference, the calculated value is 8.
．． It will be 75.

In other words, the heating load 5 minutes after the start of operation is determined to be equivalent to the size of a room of 8.75 tatami mats, and as shown in FIG. The output range is set. At this point, the forced strong operation continues as it is, and the tatami fuzzy lamp 10A remains lit.

The microcomputer 14 stores the set temperature Ts adjusted by the temperature setting switch 8. Microcomputer 1
Step 4 determines a temperature Tsl that is a certain temperature (for example, 1° C. or 2° C.) lower than the set temperature Ts, and compares this temperature Tsl with room temperature. Then, when the room temperature becomes Tsl or more, the forced strong operation at the maximum output (3200 kcal/h) is stopped, and heating output control is started in a heating output range suitable for the calculated heating load. Further, at this time, the fuzzy lamp 10A for the number of tatami mats is turned off, and the 8 tatami lamp 10C blinks, indicating that the heating output range corresponding to 8 tatami mats is set in fuzzy. The reason why the 8 tatami lamp 10C is blinked is to distinguish it from the case where the heating output range for an 8 tatami room is selected by the tatami number selection switch 7. 14 and 15 show the relationship between the calculated heating load, heating output range, and blinking lamp.

In this way, when heating control starts in the heating output range suitable for the heating load calculated by fuzzy reasoning, the microcomputer 14 calculates the deviation between the set temperature Ts and the room temperature T, the current room temperature and the previous room temperature. The heating output is controlled within the heating output range according to the temperature difference between the room temperature T and the set temperature T.
s to be maintained close to s.

The microcomputer 14 repeatedly detects the temperature difference between the current room temperature and the previous room temperature, and determines that the room temperature has stabilized when the temperature difference continuously falls within a certain range. Then, the grade of the membership function of the burner fan rotation speed shown in FIG. 10 is determined from the rotation speed of the burner fan 16 at this time (corresponding to the heating output). Then, this grade value and the previously determined grade values of Ti and ΔT are applied to the lookup tables shown in FIGS. 11 to 13, and the heating load is calculated again based on the weighting rule. If the calculated value obtained as a result is larger than the previously calculated value of the heating load,
The heating output range is shifted to the larger side, and conversely, if it is smaller, the heating output range is shifted to the smaller side. Furthermore, if the heating output range changes significantly due to load fluctuations, the blinking display of the lamp on the output display section 10 will also change accordingly.

On the other hand, when either the 10 tatami control mode, the 8 tatami control mode, or the 6 tatami control mode is selected, forced strong combustion operation at maximum output is performed until the room temperature T reaches Tsl, and then The heating output will be controlled within a certain heating output range determined by each mode.

In the above-described embodiment, in the tatami fuzzy control mode, after calculating the heating load at the beginning of the heating operation and setting the heating output range, the heating load is calculated again when the room temperature stabilizes. The heating output range is changed according to the calculated value, but the heating load correction value is calculated according to the heating output when the room temperature is stable, and the heating output range is changed according to this correction value. It's okay.

[0028]

[Effects of the Invention] Since the present invention is configured as described above, the air conditioning operation can automatically change the air conditioning output range according to the air conditioning load, and the air conditioning operation can be performed in an air conditioning output range that meets the user's needs. This allows for a comfortable and economical air conditioning operation and improves usability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control device showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing room temperature change characteristics by an apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram similarly showing the change characteristics of heating output.

FIG. 4 is a perspective view of a warm air heater, which is an example of an air conditioner.

FIG. 5 is an explanatory diagram of the operation panel of the hot air heater.

FIG. 6 is an explanatory diagram showing the relationship between the tatami size selection switch and the control mode of the microcomputer.

FIG. 7 is a flowchart for explaining the operation of the microcomputer in the fuzzy control mode.

FIG. 8 is an explanatory diagram of a membership function of initial room temperature Ti.

FIG. 9 is an explanatory diagram of a membership function of room temperature change width ΔT.

FIG. 10 is an explanatory diagram of a membership function of burner fan rotation speed (corresponding to heating output).

FIG. 11 is an explanatory diagram of a first lookup table for calculating heating load.

FIG. 12 is an explanatory diagram of a second lookup table.

FIG. 13 is an explanatory diagram of a third lookup table.

FIG. 14 is an explanatory diagram showing the relationship between the calculated heating load and the heating output range.

FIG. 15 is an explanatory diagram showing the relationship between calculated heating load and output display.

[Explanation of symbols]

1 Warm air heater (air conditioner) 7 Tatami size selection switch (selection means) 8 Temperature setting switch 12 Control device 13 Room temperature sensor 14 Microcomputer that also serves as first and second air conditioning output control means

Claims (1)

[Claims] [Claim 1] In an apparatus that compares detected values such as temperature and humidity with set values and controls air conditioning output such as cooling, heating, and dehumidification based on the comparison result, the size of the air conditioning load is calculated, a first air conditioning output control means that controls the air conditioning output within an air conditioning output range suitable for the calculated value; a second air conditioning output control means that controls the air conditioning output within an air conditioning output range that corresponds to the manual operation; 1. A control device for an air conditioner, comprising: selection means for selecting either the first or second air conditioning output control means.