KR970070886A - A method of controlling the temperature of the refrigerator by controlling the speed of the blowing fan and the stop angle position of the rotating blades and the temperature control device of the refrigerator - Google Patents

Abstract

The present invention relates to a method of controlling the temperature of the refrigerator by controlling the speed of the blowing fan and the position of the stationary angle of the rotating blades and a method of controlling the temperature of the refrigerator by controlling the direction of cooling air discharge into the refrigerating chamber, The cold air discharge speed according to the speed is controlled by the fuzzy inference, and the cold air distribution is performed according to the stop angle position of the rotary blades and the distance from the blower fan. Accordingly, the temperature value of each part of the refrigerating compartment can be precisely deduced with only a small number of temperature sensors, and the cold air distribution according to the distance and the direction can be performed by adjusting the rotation speed of the blowing fan and the stopping angle position of the rotary blades according to the deduced position, The temperature can be maintained evenly without being deviated to a specific temperature region within the temperature range.

Description

A method of controlling the temperature of the refrigerator by controlling the speed of the blowing fan and the stop angle position of the rotating blades and the temperature control device of the refrigerator

Since this is a trivial issue, I did not include the contents of the text.

1 is a diagram showing the distribution of cold air according to the distance in the refrigerating compartment according to the partial front view of the refrigerator, the enlarged perspective view of the rotary blades of FIG. 2, the rotating speed of the air blast fan, FIG. 5 is a table showing data for applying the TSK fuzzy model, FIG. 6 is a table showing the data of Table 1 in FIG. 5, FIG. 8 is a control block diagram of the temperature control device according to the present invention. FIG. 8 is a graph showing the respective divided structures, FIG. 7 is a schematic perspective view of each stage of the refrigerating chamber showing each point selected for measuring the temperature inside the refrigerating chamber, FIG. 10 is a graph showing a waveform of an AC power supply voltage. FIG. 11 is a graph showing a waveform of a control voltage applied to the fan according to the embodiment of the present invention, FIG. 12 is a graph showing a trigger signal generated from the microcomputer at a time delayed by a predetermined section (alpha) from the waveform of FIG. 11, and FIG. 13 is a graph showing an AC waveform, And FIG.

Claims (12)

A method for controlling the temperature of a refrigerator for controlling the cold air discharge speed according to the cold air discharging direction into the refrigerating chamber and the rotating speed of the blowing fan according to the stationary angle position of the rotating blades and performing cold air distribution according to the position of the rotating blades Comprising the steps of: constructing a fuzzy model for inferring the highest temperature among the various parts of the refrigerating compartment; Measuring a temperature change at a predetermined location in the refrigerating chamber; Calculating an optimal equilibrium angular position at which the rotary blade must stop toward an inferred position and an optimal equilibrium velocity at which the blower fan should be rotated by fuzzy inference by the fuzzy model according to the measured value of the temperature change, Wow; Controlling the rotating speed of the blowing fan according to the equilibrium speed and controlling the stopping angle position of the rotating blades according to the equilibrium angular position. 2. The method according to claim 1, wherein the step of constructing the fuzzy model comprises the steps of: measuring the distance from the blowing fan to the temperature change value indicated by the temperature sensor in the refrigerating chamber and the measured value data ; Performing fuzzy division based on the measurement data; Selecting an optimal structure among the divided structures of the fuzzy divided area; And calculating a line form deducing the highest temperature portion on the basis of the optimal structure. The method as claimed in claim 1 or 2, wherein the step of controlling the rotational speed of the blowing fan includes the steps of: generating an AC voltage having an effective value corresponding to a maximum driving speed of the blowing fan; Calculating an equilibrium voltage having an effective value corresponding to the equilibrium velocity; Generating a balanced voltage by cutting a waveform of the AC voltage by a predetermined interval; And supplying the balanced voltage to a driving motor for driving the blowing fan. 4. The method of claim 3, wherein cutting the AC voltage comprises: detecting a time point at which the instantaneous value of the waveform of the AC voltage becomes zero; Calculating a delay time from a point in time when the waveform becomes a zero, in which the waveform must be cut to generate the balanced voltage; And cutting the waveform for the delay time from a time point at which the instantaneous value becomes zero. The method according to claim 1, 2, or 4, further comprising: detecting an actual rotational speed of the blowing fan; Calculating a speed error between the actual rotation speed and the equilibrium speed; Further comprising the step of controlling the rotational speed of the blowing fan by taking a value reflecting the speed error at the equilibrium speed. The method of claim 1, 2, or 4, further comprising the steps of: detecting an actual stop angle position of the rotary blade; Calculating an angular position error between the actual angular position and the angular position; Further comprising the step of controlling the stop angle position of the rotary blade by taking a value reflecting the position error as the balance angle position. A temperature control device of a refrigerator for controlling a cold air discharge speed according to a cold air discharge direction into a refrigerating chamber and a rotational speed of a blowing fan according to a stationary angle position of a rotating blades and performing cold air distribution according to a stop angle position of the rotary blades and a distance from the blowing fan A measuring unit for measuring a temperature change at a predetermined location in the refrigerating compartment; A fuzzy inference unit for fuzzy inference according to the measurement value of the measurement unit and deducing an equilibrium angular position corresponding to an optimal blowing fan rotation speed and an optimum rotation blade stop angle position necessary for maintaining the equilibrium of the temperature in the refrigerating compartment; A rotation speed control unit for controlling a rotation speed of the blowing fan according to the equilibrium speed; And a stationary angle position controller for controlling the stationary angle position of the rotary vane according to the balance angular position. The apparatus according to claim 7, wherein the rotation speed control unit comprises: a power generation unit generating an AC voltage having an effective value corresponding to a maximum driving speed of the blowing fan; A balanced voltage generator for generating a balanced voltage having an effective value corresponding to the equilibrium velocity by cutting the AC voltage for a predetermined interval; And a driving motor for driving the blowing fan according to the balanced voltage. The apparatus of claim 8, wherein the balanced voltage generating unit comprises: a zero voltage detecting unit detecting a time point at which the instantaneous value of the waveform of the AC voltage becomes zero; A delay time calculating unit for calculating a delay time from the time point when the waveform must be cut to generate the balanced voltage; And a waveform cut-out unit for cutting the waveform from a time point at which the instantaneous value becomes zero to a delay time point at which the delay time elapses. The apparatus of claim 9, wherein the waveform cutout portion comprises: a triac connected to the power generating portion in series; And a tree rejection unit for applying a trigger signal to the gate terminal of the triac at the delay time point. 11. The air conditioner according to any one of claims 7 to 10, further comprising: an actual speed detecting section for detecting an actual rotating speed of the blowing fan; and a speed error calculating section for calculating a speed error between the actual rotating speed and the equilibrium speed ; Wherein the control unit controls the rotational speed of the blowing fan by taking a value reflecting the speed error at the equilibrium speed. 11. An apparatus according to any one of claims 7 to 10, further comprising: an actual stop angle position detection unit for detecting an actual stop angle position of the rotary vane; and an angular position error detecting unit for calculating an angular position error between the actual stop angle position and the balance angle position Further comprising a calculation unit; Wherein the control unit controls the stop angle position of the rotary vane by taking a value reflecting the position error as the equilibrium angular position. ※ Note: It is disclosed by the contents of the first application.