JP2676781B2 - Air conditioner and fan heater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control method for an air conditioner device and a fan heater.

2. Description of the Related Art Conventionally, in an air conditioner, for example, a temperature sensor including a thermistor or the like is provided at a suction port of an indoor unit to measure a room temperature (room temperature), and a compressor is controlled so that the room temperature reaches a desired set temperature. .

Problems to be Solved by the Invention With such a conventional control method, the compressor is turned on and off during the difference between the room temperature and the room temperature, but a time delay occurs until the set temperature is reached. Therefore, if the amount of heat entering or leaving the room changes each time due to disturbances such as opening and closing the room, direct sunlight, or drafts, the response to the set temperature will be delayed due to the time delay. Slowly, Yui had a problem that the user had to frequently change the set temperature up or down depending on the state of disturbance. In addition, it is necessary to change the method of setting temperature based on experience and intuition while considering the degree of temperature change. The fan heater also turns the burner on and off as a temperature adjustment, but the same problem occurred.

The present invention has been made in view of the above points, and an object thereof is to provide an air conditioner device or a fan heater that can finely and automatically control a temperature change state in a room.

Means for Solving the Problems In order to solve the above problems, the present invention provides a compressor or a measuring device for measuring room temperature and temperature change and a fuzzy control rule preset according to the output of the measuring device. It controls the burner.

Effect The present invention, due to the above-mentioned configuration, can control the room temperature to a predetermined temperature at high speed even when the room is opened or closed.

Embodiment FIG. 1 is a block diagram showing an embodiment of an air conditioner device of the present invention. A compressor 1 controls the amount of heat supplied per unit time by driving an inverter. Reference numeral 2 denotes a temperature sensor provided at the inlet of the indoor unit, which is composed of, for example, a thermistor. Reference numeral 3 denotes a processing device, which obtains a room temperature t and a temperature change θ per unit time obtained from the output of the temperature sensor 2. This can be easily realized by a known technique from an analog-digital converter or a microprocessor. An ambiguous controller 4 receives the room temperature t and the temperature change θ as an input and causes the compressor 1 to act on the amount of heat supplied per unit time of the interface as an output. The operation of the fuzzy controller 4 during heating will be described below, but the same applies during cooling. The function of the fuzzy controller 4 is that the room temperature t and the temperature change θ
So that both become appropriate values, the heat supply D of the inverter
Is determined and output to the compressor 1. For that purpose, the fuzzy inference is performed in which the room temperature t and the temperature change θ are input and the heat supply amount D of the inverter is output. Fuzzy inference is an inference method that determines output according to control rules described linguistically, and by reflecting knowledge based on human experience and intuition in rules, it is possible to design a control system that meets requirements. . There is also an advantage that it is strong against a change in the characteristics of the system.

As the control rules, for example, those shown in Table 1 can be considered.

If the inputs are the room temperature t and the temperature change θ, the combination of rules is represented by a two-dimensional matrix, and each rule shows that the room temperature t is the same as when operating the air conditioner for the first time when the air conditioner is completely cold. If it is negative and large (NL) and the temperature change θ is very small (SS), the supplied heat amount D is very large (PL). When the room temperature t is positive and small (PS) and the temperature change θ is a little large (LA), as when the sun goes down, the supplied heat amount D is reduced to a medium level (NM). Input and output are represented by fuzzy variables, which are ambiguous expressions such as negative, large, and very small as mentioned above. Each fuzzy variable is defined by membership function as shown in Fig. 2. . The temperature change θ is shown in Fig. 2a.
, The fuzzy variables from SS (very small) to LL (very large) are defined, and the room temperature t is as shown in FIG. 2b. [-1,1]
Is normalized to the interval of, and five fuzzy variables from NL (negative and large) to PL (positive and large) are defined. The output is the heat supply amount D of the inverter and is also defined as shown in FIG. 2c.

Hereinafter, the past of actual fuzzy inference will be described with reference to FIG. First, find the conclusion for each rule. For example, the rule (if t = NL and θ = SS then
As shown in FIG. 3, first, take the MAX of each variable of the antecedent and the input value and take the MIN of them to determine the suitability of the antecedent. Ask. Next, take the MIN of the fitness of the consequent part variable and the antecedent part as the conclusion of this rule. After obtaining the conclusions for each rule in this way, the MAX of all conclusions is taken and the value corresponding to the center of gravity is taken as the inference result. The execution of such inference is
It can be realized by using a general-purpose microcomputer or digital signal processor. It is also possible to use a dedicated fuzzy arithmetic chip.

With the above configuration, the compressor 1 is controlled in consideration of both the room temperature t and the temperature change θ. Therefore, when the room temperature is changed, it is possible to perform an appropriate temperature change and control the set temperature at a high speed. Needless to say, the present invention can be applied to the fan heater by controlling the ON / OFF time of the burner instead of the heat supply amount of the inverter. The present invention can be applied as a method of controlling the temperature beyond the above-mentioned examples, and its industrial effect is extremely large. Further, since various variations can be considered for the inference method, an inference method other than the illustrated one can also be used. Also, by recognizing the situation of the user at that time by voice recognition or the like, for example, a request such as "cold" when entering a room from the outside, and changing the fuzzy inference rules shown in Table 1 to output each time. The pattern may be changed. Although the temperature sensor is used as the sensor, the fuzzy control law may be set for each input by inputting humidity, air flow, radiant heat, or the like.

EFFECTS OF THE INVENTION As described above, according to the present invention, the room temperature can be controlled by an appropriate temperature change even when the temperature of the room changes, and the temperature can be rapidly shifted to the set temperature. Further, since the fuzzy inference is used, it is easy to take intuition and intuition of the user and configure a control system having characteristics that meet the requirements.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the definition of fuzzy variables, and FIG. 2 is a diagram explaining the process of fuzzy inference. 1 ... Compressor, 2 ... Temperature sensor, 3 ... Processing device, 4 ... Fuzzy controller.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G05B 13/02 G05B 13/02 N (56) References JP-A-61-250436 (JP, A) JP-A-62-175517 (JP, A) JP-A-62-226304 (JP, A) JP-A-53-14944 (JP, A) JP-A-53-9034 (JP, A) JP-A-63-108145 (JP, A) JP 63-131942 (JP, A) JP 64-22617 (JP, A) JP 60-44683 (JP, B2)

Claims (2)

(57) [Claims] 1. A measuring instrument for measuring a temperature and a temperature change in a room, and a controller for performing temperature control by determining an output to a compressor by a fuzzy control law according to an output of the measuring instrument and a sense of a user. The controller has a rule for inferring an output to a compressor from a plurality of inputs including at least the instrument output and a user's sensation, and a fit obtained from the plurality of inputs and the antecedent membership function. An air conditioner device characterized in that the consequent part of a rule is weighted according to the degree, and an inference output determined based on the result of combining the conclusions of the weighted rules is output to the compressor. 2. A measuring device for measuring the temperature and temperature change in a room, and a controller for controlling the temperature by determining the output to the burner by a fuzzy control law according to the output of the measuring device and the sense of the user. The controller has a rule to infer an output to a burner from a plurality of inputs including at least the measuring device output and a user's sense, and is obtained from the plurality of inputs and the antecedent part membership function. A fan heater device characterized in that a rule consequent part is weighted according to a goodness of fit, and an inference output determined based on a result of combining the conclusions of the weighted rules is output to a burner.