JPH06159773A - Controller for air conditioner - Google Patents

Abstract

PURPOSE:To realize acceleration of rising of an indoor temperature which follows up an atmospheric temperature by controlling an operation of a compressor based on a deviation between the indoor temperature and a set temperature and a change rate of the indoor temperature and correcting a membership function of an operating frequency with the atmospheric temperature. CONSTITUTION:An indoor temperature Tr detected by an indoor temperature sensor 1 is compared with a set temperature Ts stored in a memory 2 by comparing means 3 to obtain a deviation (t), a change rate DELTAt of the indoor temperature is calculated by a calculator 4, and its result is input to a fuzzy controller 5 together with the deviation (t). A membership function of a conclusion unit of a speed code F is corrected by a membership function converter 10 by referring to an atmospheric temperature T0 of an atmospheric temperature sensor 8 and an atmospheric temperature correction table 9 of the code. A change quantity (f) of the code F of a compressor 7 is calculated from the membership function of the deviation (t) and the change rate DELTAt to control an operation of the compressor 7.

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 specifically, in consideration of the size, structure, season, etc. of an air-conditioned room, a compressor of a compressor can be used in accordance with the rate of change of outside air temperature and room temperature. The present invention relates to a control device that controls operation.

[0002]

2. Description of the Related Art Conventionally, in controlling the indoor temperature of an air conditioner, a fuzzy control rule is set by using a standard living environment as a model, and the difference between the indoor temperature and the set temperature and the change (change) of the indoor temperature per unit time are set. Ratio) to calculate the rotation speed code of the compressor by fuzzy calculation, control the rotation speed of the compressor, change the cooling or heating capacity of the air conditioner, and maintain the room temperature at the set temperature. However,
Fluctuations in the indoor temperature also depend on the living environment such as the outdoor temperature and the size of the room to be air-conditioned, the season, etc., and the compressor rotation speed is uniquely determined from the difference between the indoor temperature and the set temperature and the rate of change of the indoor temperature. There is a case in which the set temperature is not quickly met just by controlling. For example, even if the difference between the room temperature and the set temperature and the rate of change of the room temperature are the same, the time to reach the set temperature becomes longer due to the outside air temperature and the size of the room to be air-conditioned, and the set temperature is quickly changed. A slightly higher cooling or heating capacity may be required to meet.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and controls so as to maintain the indoor temperature at a set temperature, including factors such as the outdoor temperature and the size of the room to be air-conditioned. It is an object of the present invention to provide a control device for an air conditioner that operates.

[0004]

In order to achieve the above object, the control device includes means for detecting an indoor temperature by a room temperature sensor, and comparison means for comparing the detected indoor temperature with a preset temperature. , A storage unit that stores the detected indoor temperature, a calculation unit that calculates the rate of change in the indoor temperature based on the detected indoor temperature and the previously stored indoor temperature, and an outdoor temperature sensor that is installed in the outdoor unit A means for detecting is provided, the outside air temperature, the current compressor rotation speed code,
The rate of change of the indoor temperature was input, and fuzzy calculation was performed according to the fuzzy control law considering the size, structure and season of the air-conditioned room, and the correction value of the conclusion function membership function of the compressor speed control was calculated and corrected. Conclusion The membership function is used to control the rotation speed of the compressor.

[0005]

According to the above construction, the control device detects the room temperature by the room temperature sensor, the comparing means for comparing the detected room temperature with the preset temperature, and the detected room temperature. A storage unit for storing, a calculation unit for calculating the change rate of the indoor temperature from the detected indoor temperature and the previously stored indoor temperature, and a unit for detecting the outside air temperature by the outside air temperature sensor provided in the outdoor unit are provided. Fuzzy calculation is performed by inputting the outside air temperature, the set rotation speed code, and the change rate of the indoor temperature, and the conclusion function membership function of the compressor rotation speed control is corrected to determine the deviation between the set temperature and the indoor temperature and the indoor temperature. In accordance with the rate of change of and the corrected conclusion part membership function, the increase / decrease value of the rotation speed code of the compressor is obtained by fuzzy calculation, and the rotation speed of the compressor is controlled.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a control device of the present invention, in which an indoor temperature sensor 1 detects an indoor temperature Tr, and a comparing means 3 compares a set temperature Ts stored in a memory 2 with the detected indoor temperature Tr. To obtain the deviation t,
The rotation speed code F of the compressor 7 is set, and at the same time, the change rate Δt
The rate of change Δt of the room temperature is calculated by the arithmetic circuit 4 and the deviation t
And the change rate Δt are input to the fuzzy controller 5, the change amount f of the rotation speed code F of the compressor 7 is calculated, and the operation of the compressor 7 is controlled by the rotation speed code adjusting circuit 6. Further, the fuzzy controller 5 uses the outside air temperature To detected by the outside air temperature sensor 8 and the outside air temperature correction table 9 of the preset rotation speed code to convert the membership function of the rotation speed code F into a membership. The function conversion circuit 10 is provided to calculate the variation f of the rotation speed code F of the compressor 7 by the membership function of the rotation speed code F corrected by the outside air temperature.

FIG. 2 is a control block diagram of the present invention, in which the set temperature Ts and the room temperature Tr are included in the compressor fuzzy control program.
, The rate of change in room temperature Δt is input, and the rotation speed code F is corrected by the outside air temperature To and the outside air temperature. According to Table 9, the conclusion function of the rotation speed code F is corrected by the membership function conversion circuit 10 to obtain the deviation. The change amount f of the rotation speed code F of the compressor 7 is calculated from the membership function of t and the membership function of the change rate Δt to obtain a fixed value (F + f) of the rotation speed code F, and the compressor 7 I'm trying to control the driving.

FIG. 3 shows the deviation t, the rate of change Δf, the membership function f in the conclusion part and the fuzzy control rule in the conventional compressor fuzzy control, and the outside temperature is shown in FIG. 4 for the membership function f in the conclusion part. Correction by To is performed, and the membership function f (rotation speed code increase / decrease value) is set as shown in FIG. 3 (e) by the fuzzy calculation adjustment value x of the membership function, and the current rotation speed code F is set. The operation of the compressor is controlled by the rotation speed code F to which the increase / decrease value f is added. FIG. 4 is a fuzzy calculation for correcting the membership function f in the above conclusion part by the outside air temperature To. The present rotation speed code F and change rate Δ
With t as an input, the adjustment value x of the membership function f is obtained from the correction value shown in FIG.

FIG. 5 is a flow chart showing the details of the present invention. In this example, the timer is set with a control cycle of 1 minute, and when the time is up, the room temperature Tr and the outside air temperature To are detected and stored in the memory 2. The rate of change Δt is calculated in comparison with the previous room temperature, the correction value y of the rotation speed code is calculated from the outside air temperature To according to FIG. 4 (e), and the correction value y is set in the membership function x. A fuzzy operation is performed using the code F and the rate of change Δt as input, and the adjustment value x of the membership function of the increase / decrease value f of the rotation speed code is obtained. As shown in FIG.
Set to. In this state, the difference t between the room temperature Tr and the set temperature Ts is obtained, the fuzzy operation is performed by inputting the difference t and the change rate Δt, the increase / decrease value f of the rotation speed code F is calculated, and the increase / decrease value f is added to the current rotation speed code F. Is added to control the operation of the compressor as the rotation speed code F. After that, the detected room temperature Tr is stored in the memory 2 as the previous room temperature and the timer is set.

[0010]

As described above, in the present invention, by correcting the membership function of the operating frequency by the outside air temperature and controlling the frequency of the compressor, the rise of the indoor temperature can be accelerated by following the outside air temperature. Energy can be saved by properly operating the compressor.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a deviation t, a change rate Δf, a membership function f of a conclusion part and a fuzzy control rule in a conventional compressor fuzzy control, and a diagram showing a membership function f of the conclusion part of the present invention.

FIG. 4 is a diagram showing correction of the membership function f in the conclusion part of the present invention.

FIG. 5 is a flow chart showing details of the present invention.

[Explanation of symbols]

 1 Indoor temperature sensor 2 Memory 3 Comparison means 4 Change rate Δt arithmetic circuit 5 Fuzzy controller 6 Rotation speed code adjustment circuit 7 Compressor 8 Outside air temperature sensor 9 Rotation speed code F Outside air temperature correction table 10 Membership function conversion circuit 11 Rotation speed code F setting circuit

Claims (1)

[Claims] 1. A room temperature control of an air conditioner is fuzzy controlled using a difference between a set temperature and an indoor temperature and a rate of change of an indoor temperature per unit time as an input, and an increase / decrease value of a compressor rotation speed code as an output. In the control device of the air conditioner
A means for detecting the room temperature by the room temperature sensor in the control device, a comparing means for comparing the detected room temperature with a preset temperature setting, a storage means for storing the detected room temperature, and a detected means. The indoor temperature and the previously stored indoor temperature are used to calculate the rate of change of the indoor temperature and the outdoor air temperature sensor installed in the outdoor unit to detect the outdoor air temperature. A number code,
The rate of change of the indoor temperature was input, and fuzzy calculation was performed according to the fuzzy control law considering the size, structure and season of the air-conditioned room, and the correction value of the conclusion function membership function of the compressor speed control was calculated and corrected. Conclusion Section An air conditioner controller characterized in that it controls the number of revolutions of the compressor by a membership function.