JPH0571786A - Control device of air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] Concerning the operation mode setting at the start of automatic operation of the air conditioner, it is possible to shorten the time until the operation mode is set and quickly bring the indoor air conditioning conditions into the operation mode control state. An object is to provide a control device for an air conditioner. [Configuration] A means for detecting an indoor temperature and an outdoor temperature at the start of the automatic operation, a storage means for storing the indoor temperature at the previous stop, and a difference between the indoor temperature at the start of the operation and the indoor temperature at the previous stop A fuzzy inference circuit is used to input the difference between the room temperature at the start of operation and the room temperature at the time of the previous stop, and a definite value for the operation mode is set. Is characterized by.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner, and more particularly to a method for setting an operation mode at the start of automatic operation.

[0002]

2. Description of the Related Art Conventionally, at the time of starting "automatic operation" of an air conditioner, an indoor blower and an outdoor blower are operated for a fixed time (about 1 minute) to detect indoor temperature, humidity and outside air temperature,
As shown in FIG. 1, it is controlled to select an optimum operation mode among “heating”, “cooling”, “dehumidifying circuit (dry)”, and “monitoring” and start the operation. In this case, the room temperature,
When the humidity or outside temperature is in the "monitoring" mode, it will be in a standby state, and a weak air blow will be performed for about 1 minute every 15 minutes, and the room temperature,
The humidity and the outside air temperature are detected, and this state is controlled to be repeated until the indoor temperature or the outdoor temperature changes to the outside of the "monitoring" mode. In this way, since the preliminarily indoor temperature, humidity and outside air temperature are detected and automatic operation is started, it is not possible to start the operation of the air conditioner at the same time as turning on the power,
In particular, when the "monitoring" mode was selected at the start of automatic operation, it did not operate for up to 15 minutes, which sometimes caused the user to feel uncomfortable.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and sets an operation mode based on the difference between the room temperature at the start of operation and the room temperature at the previous stop of operation. Accordingly, it is an object of the present invention to provide a control device for an air conditioner that starts operation without delay when power is turned on.

[0004]

In order to achieve the above-mentioned object, means for detecting humidity, room temperature and outside air temperature, storage means for storing the operation mode and room temperature at the last stop,
Comprising a calculating means for calculating the difference between the room temperature at the start and the room temperature at the last stop, according to the operation mode at the last stop,
A fuzzy logic operation is performed with the difference between the detected indoor temperature and the indoor temperature at the time of the previous stop as input, and the operation mode is set.

[0005]

According to the above configuration, the operation mode at the start of automatic operation is set in advance according to the difference between the room temperature at the start of operation and the room temperature at the previous stop of operation, and the operation mode at the start of operation. The selected fuzzy control law is used to start the operation.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is a diagram showing the operation mode of automatic operation, divided into more and less than 60% of humidity as a boundary, and the zones of the operation mode of "heating""monitoring""dehumidification""cooling" according to the outdoor temperature and the indoor temperature. As shown, during automatic operation, control is performed according to this operation mode zone. FIG. 2 is a block diagram showing the configuration of the control device of the present invention, which includes a humidity detection sensor 7 for detecting indoor humidity, a room temperature detection sensor 2 for detecting indoor temperature, an outdoor temperature sensor 9 for detecting outdoor temperature, and control. It is composed of a microcomputer 1 for use and a fuzzy controller 5.
The control microcomputer 1 includes a memory 3, a comparison circuit for comparing the detected value from the humidity detecting sensor 7 and the detected value from the outdoor temperature sensor 9 with the respective set values based on FIG. 1 stored in advance in the memory 3. 8 and a ΔTR calculation circuit 4 for obtaining a temperature difference from the detection value from the room temperature detection sensor 2 at the time of the previous stop stored in the memory 3 and the detection value from the room temperature detection sensor 2 at the time of automatic operation are provided in the fuzzy controller 5. A membership function converter 6 for converting the fuzzy control rule into a membership function is provided. The control microcomputer 1 obtains the difference ΔTR from the room temperature data at the previous stop stored in the memory 3 and the room temperature data at the start of the automatic operation by the ΔTR calculation circuit 4, and determines the indoor temperature TR at the start of the automatic operation. The fuzzy controller 5 is operated with the first input as the second input and the difference ΔTR with the room temperature TR0 at the previous stop as the second input.
The operation mode OP is set as the output by the membership function converter 6 and the fuzzy control rule.

The operation of the fuzzy controller 5 will be described below with reference to the main control block diagram of FIG. When the difference ΔTR between the room temperature TR at the start of automatic operation and the room temperature TR0 at the previous stop stored in the memory 3 is input to the fuzzy controller 5, the membership functions are calculated as shown in FIG. The grade is calculated, the minimum grade value of the operation mode OP is calculated by TR, ΔTR and the fuzzy control rule, and the set of operation modes OP and the center of gravity thereof are calculated. If the set of operation modes OP is smaller than OP1, the operation mode is "heating". , The air blow / monitoring between OP1 and OP2, and the cooling mode when OP2 or more, the definite value of the operation mode and its grade are determined. The fuzzy control rule is N for each operation mode when stopped last time.
Three fuzzy variables are defined from S (a little in the negative direction) to PS (a little in the positive direction), and a fuzzy inference forms a two-dimensional matrix as shown in FIG. For example, if the operation mode at the previous stop was cooling / dry operation, the room temperature TR is slightly lower in the negative direction (NS), and the temperature difference ΔTR
If it is a little lower in the negative direction (NS), the fuzzy control rule depends on human experience and intuition such as IF TR = NS and ΔTR = NS then OP = H so that the operation mode is set to heating (H). Rules can be expressed linguistically.

FIG. 7 shows an inference result obtained for each fuzzy control rule when the operation mode is cooling / dry operation based on the indoor temperature data at the time of the previous stop shown in FIG.
In FIG. 8 and FIG. 8, the inference results are displayed in the shaded area, and the union of these inference results is shown as the shaded area in FIG. 9 (1). Is a definite value of. As shown in Fig. 7, when the room temperature at the start of automatic operation is 24.5 ° C, Fx is OP1 and Ox.
It is between P2 and the automatic operation mode is set in the "blower / monitor" state. Similarly, the room temperature TR at the start of automatic operation is 2
In the case of 4.5 ° C, the union obtained from the inference results when the operation mode is the heating operation (the same situation is the case of ventilation / monitoring) is shown as the shaded area in Fig. 9 (2),
The value Fx corresponding to the center of gravity becomes a value lower than OP1, and the automatic operation mode is set in the "heating operation" state. FIG. 10 is a flow chart showing the details of the present invention, in which the room temperature TR is detected by the room temperature sensor at the start of the automatic operation (21), and the difference between the room temperature TR and the room temperature TR0 stored in the memory 3 at the time of the previous stop. Calculate ΔTR (22), select the previous set temperature TR1, TR2, TR3 and fuzzy control rule shown in Fig. 6 according to the operation mode at the previous stop (23), and set TR and ΔTR.
(24) (25), the set of operation modes OP is calculated by the fuzzy control rule (26), and TR and ΔT are calculated.
The OP grade is calculated from R (27), the union of OP and the center of gravity are calculated (28), and the definite value of the operation mode is determined (29).

[0009]

As described above, in the present invention, the operation mode at the time of starting the automatic operation is input with the difference between the room temperature at the time of the previous operation stop and the room temperature at the time of the operation start as input. According to the mode, the fuzzy logic operation is performed according to the preset fuzzy control law and the operation mode is selected, so that the operation can be started at the same time when the power is turned on, and the automatic operation that does not give the user a feeling of strangeness is performed. You can

[Brief description of drawings]

FIG. 1 is a diagram showing an operation mode of automatic operation.

FIG. 2 is a block diagram showing a configuration of a control device of the present invention.

FIG. 3 is a main-part control block diagram.

FIG. 4 is a diagram showing a membership function.

FIG. 5 is a diagram showing a fuzzy control rule.

FIG. 6 is a diagram showing a room temperature data set value at the time of the previous stop.

FIG. 7 is a diagram in which an inference result is obtained for each fuzzy control rule.

FIG. 8 is a diagram for similarly obtaining an inference result for each fuzzy control rule.

FIG. 9 is a diagram in which a union set of inference results and a centroid are obtained.

FIG. 10 is a flowchart showing details of the present invention.

[Explanation of symbols]

 1 Control microcomputer 2 Room temperature detection sensor 3 Memory 4 ΔTR calculation circuit 5 Fuzzy controller 6 Membership function converter 7 Humidity detection sensor 8 Comparison circuit 9 Outdoor temperature detection sensor

Claims (1)

[Claims] 1. A means for detecting humidity, an indoor temperature and an outdoor temperature, a storage means for storing an operation mode and an indoor temperature at a previous stop, and a difference between an indoor temperature at a start and an indoor temperature at a previous stop. According to the operation mode at the last stop, the fuzzy logic operation is performed by inputting the difference between the detected indoor temperature and the room temperature at the previous stop, and the operation mode is set. A characteristic air conditioner control device.