JPH06229612A - Air conditioner - Google Patents

Abstract

PURPOSE:To improve comfortable feeling by mixing and fluctuating strength of air flow in a room and a diffusing temperature. CONSTITUTION:A fluctuation control is so conducted by an indoor controller 8 having a microcomputer that a speed of an indoor blower 7 and a power spectrum of an angle of a louver 13 provided in a diffuser of an indoor unit B are inversely proportional to a frequency and a power spectrum of an operating frequency value of an inverter 17 for controlling an operating frequency of a compressor 1 is inversely proportional to a square of the frequency. Simultaneously, one period times of the fluctuation control are equalized thereby to include comfortableness effect of the three fluctuation controls for a certain time at the same ratio, thereby conducting balanced mixed fluctuation controls.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called separate type air conditioner having an outdoor unit and an indoor unit separated from each other, and more particularly to comfortable control of an indoor blower provided in the indoor unit. Is.

[0002]

2. Description of the Related Art As is well known, the strength and direction of wind in nature are not constant and constantly change, and are classified into various types of "fluctuations" depending on the relationship between the frequency and the power spectrum.

FIG. 13 shows various aspects of fluctuations, where the horizontal axis represents frequency and the vertical axis represents power spectrum on a logarithmic scale. In this figure, (a) shows 1 / f ⁰ fluctuation, which changes irregularly and is completely unpredictable. (B) is a fluctuation of 1 / infinity of f,
It is completely predictable with a single cycle change.

(C) is 1 against the fluctuations of these extremes.
/ F ² fluctuation, which is a relatively slow change and can be predicted to some extent. Further, (d) is 1 / f fluctuation, which is a stimulus intermediate between 1 / f ⁰ fluctuation and 1 / f ² fluctuation, and is irregular, but fluctuation to some extent can be predicted. . In other words, it is a state of change in which stability and instability antagonize each other, and fluctuations that are sometimes unexpected and moderately mixed in slowness.

By the way, it is generally said that the human sense has the property of gradually adapting to the environment and becoming dull over time. Therefore, in order to improve and maintain a comfortable feeling in the air conditioner, it is necessary to control the air flow rate, the air direction, and the blowing temperature by appropriate fluctuation control. Further, the thermal sensation of human beings largely depends on the heat dissipation state of the skin surface, and the strength of the wind hitting the body, the direction of the wind, and the temperature have a large influence in this order.

[0006] Conventionally, as an air conditioner which has taken measures so as to control the fluctuation of the air flow rate and the blowing temperature in consideration of the fluctuation of the wind flow occurring in the natural world and the peculiar sensation of human beings, for example, JP-A-2- There is one disclosed in Japanese Patent No. 203147.

The air conditioner according to this prior art performs fluctuation control by associating the power spectrum of the controlled object, which is related to the indoor blowing air speed, with the 1 / f law of the frequency f during the cooling operation, and also during the cooling operation. By controlling the temperature to be slightly higher than the room temperature, comfort is improved. According to this, if the 1 / f fluctuation is regarded as a natural wind pattern and the blowing air velocity is controlled according to the 1 / f fluctuation pattern, comfortable air conditioning can be realized.

[0008]

However, in the configuration of the above prior art, only 1 / f fluctuation or a single cycle of air blowing and constant temperature control including a monotonous hunting cycle are performed. It could not be said that the optimal comfort control was performed as an air conditioner.

The present invention has been made in order to solve the above-mentioned conventional problems, and in order to cause fluctuations in the strength of blown air and the temperature of blown air, the number of revolutions of the blower, the louver angle, and the inverter. It is an object of the present invention to provide an air conditioner in which comfort fluctuation is improved by controlling mixed fluctuation with an operating frequency value.

[0010]

According to the present invention, there is provided a refrigeration cycle formed by sequentially connecting a variable capacity compressor, an outdoor heat exchanger, an expansion valve and an indoor heat exchanger and a refrigeration cycle through which the indoor heat exchanger is passed. And an indoor blower control means for controlling the number of revolutions of the indoor blower,
A louver whose posture can be changed to change the direction of air blown by the indoor blower, louver control means for controlling the angle of the louver, an inverter for performing variable capacity control of the compressor, the indoor blower control means, louver control means, and The target is an air conditioner including an indoor control device that controls the output of an inverter.

To achieve the above object, the indoor control device causes the power spectrum of the rotation speed of the indoor blower to be inversely proportional to the frequency, and the power spectrum of the angle of the louver to be inversely proportional to the frequency. The power spectrums of the operating frequency values are controlled so that they are simultaneously controlled so that they are inversely proportional to the square of the frequency.

In the above structure, one cycle time of each fluctuation control of the rotation speed of the indoor blower, the angle of the louver, and the operating frequency value of the inverter in the indoor control device is set to be the same, and further the fluctuation control by the indoor control device is performed. It is desirable to set the step time forming the periodic pattern of No. 1 in order of the operating frequency value of the inverter, the angle of the louver, and the rotation speed of the indoor blower.

Further, in the above-mentioned structure, the indoor control device has a plurality of different fluctuation control patterns built therein, and the indoor control device controls the rotational speed of the indoor blower, the angle of the louver, and the operating frequency value of the inverter as described above. The indoor control device may be configured to perform fluctuation control according to any one of the fluctuation control patterns selected based on the difference between the set temperature and the detected room temperature.

In the indoor control device having such a plurality of fluctuation control patterns, when it is determined that the detected room temperature increase rate is larger than the predetermined value during the fluctuation control operation in the cooling operation mode, the louver angle is determined. Selects an eye fluctuation control pattern with a large change amplitude, and an eye fluctuation control pattern with strong ability for the rotation speed of the indoor blower and the operating frequency value of the inverter, and conversely, during fluctuation control operation in the heating operation mode. When it is determined that the rate of increase in the detected room temperature is larger than the predetermined value, the fluctuation control pattern is such that the change amplitude of the louver angle is small, the indoor blower rotation speed and the inverter operating frequency value. It is desirable to configure so that the eyes with weak ability are selected.

Similarly, during the fluctuation control operation in the cooling operation mode, when it is determined that the detected room temperature decrease rate is larger than the predetermined value, the fluctuation control pattern is set to have a small louver angle, the indoor blower rotation speed. And the inverter operating frequency value, select the weaker one,
During the fluctuation control operation in the heating operation mode, when it is determined that the detected room temperature decrease rate is larger than the predetermined value, the louver angle is large, and the indoor blower rotation speed and the inverter operating frequency value are strong. It is desirable to configure the selection.

[0016]

Action: Humans are sensitive to changes in wind, but not so sensitive to changes in temperature. From the perspective of comfort, the change in wind speed and wind direction is 1 / f fluctuation, which is a moderate mix of unexpected changes in slowness, while 1 / f ² fluctuation is relatively slow in temperature change. Is suitable.

According to the above structure, the power spectrum of the rotation speed of the indoor blower and the angle of the louver are inversely proportional to the frequency, and the power spectrum of the operating frequency value of the inverter is inversely proportional to the square of the frequency. The control is performed based on a plurality of time series data having characteristics.

Each fluctuation control described above is realized by repeating the time-series data for one cycle time set appropriately. By making the one cycle times equal, the comfort effects of the above three fluctuation controls can be included in a certain time in the same ratio, and a well-balanced mix fluctuation control can be performed.

In this case, each time-series data for the fluctuation control is composed of control data of each of a plurality of stages and a step time for controlling the switching of each step. By making it the longest, then the louver angle control step time, and the indoor blower rotation speed control step time the shortest, to create a relatively small change in the wind speed fluctuation, which is the human heat Mix fluctuation control suitable for the sensitivity of the senses can be performed.

Further, due to the difference between the set temperature and the detected room temperature,
Regarding the fluctuation control of indoor fan speed, louver angle, and inverter operating frequency value, regarding the configuration that allows selection of time series patterns for different fluctuation control, the room temperature has not reached the set temperature and the difference Is large, the eye fluctuation control pattern having a large change amplitude is selected for the louver angle, and the eye fluctuation control pattern having a strong ability is selected for the rotation speed of the indoor blower and the inverter operating frequency value.

Then, when the room temperature approaches the set temperature and the difference becomes small, the eye fluctuation control pattern with a small amplitude of change in the louver angle and the weak eye performance with respect to the rotation speed of the indoor blower and the inverter operating frequency value are detected. Select the fluctuation control pattern. As a result, it is possible to suppress discomfort until the set temperature is reached, especially at the beginning of operation.

Further, as described above, when it is determined that the detected room temperature increase rate is larger than the predetermined value during the fluctuation control operation in the cooling mode, it is determined that the cooling load has increased, and the louver angle changes. The eye fluctuation control pattern having a large amplitude is selected as the eye fluctuation control pattern having a strong ability with respect to the rotation speed of the indoor blower and the inverter operating frequency value.

On the contrary, in the heating operation mode, it is judged that the heating load has decreased, and the eye fluctuation control pattern in which the amplitude of change in the louver angle is small is set, and the rotation speed of the indoor blower and the inverter operation frequency value are set to the capacity. Choose a weak eye fluctuation control pattern.

Further, when it is judged that the decrease rate of the detected room temperature is larger than the predetermined value during the fluctuation control operation in the cooling mode, it is judged that the cooling load is decreased and the amplitude of the change in the louver angle is small. Fluctuation control pattern of
Regarding the rotation speed of the indoor blower and the inverter operating frequency value, the eye fluctuation control pattern with weak performance is selected.

Further, in the heating operation mode, it is determined that the heating load has increased, and the eye fluctuation control pattern having a large change amplitude for the louver angle is set, and the ability for the indoor blower rotation speed and the inverter operating frequency value is determined. Select a strong eye fluctuation control pattern. As a result, it is possible to perform load variation matching control without impairing comfort and suppressing large variations in room temperature.

[0026]

EXAMPLES Examples of applying the present invention to a separate type air conditioner used in general households will be described below.
A detailed description will be given with reference to the drawings. The present invention is not limited to this. FIG. 1 schematically shows the overall configuration of this embodiment. In this figure, A is an outdoor unit and B is an indoor unit.

The outdoor unit A is provided with a variable capacity compressor 1, a four-way valve 2, an outdoor heat exchanger 3 and an expansion valve 4, respectively. On the other hand, the indoor unit B is provided with an indoor heat exchanger 5. These devices are compressor 1-> 4-way valve 2-> outdoor heat exchanger 3-> expansion valve 4-> indoor heat exchanger 5->
A four-way valve 2 and a compressor 1 are connected in this order to form a refrigeration cycle.

An outdoor blower 6 is provided in the vicinity of the outdoor heat exchanger 3, and an indoor blower 7 is provided in the vicinity of the indoor heat exchanger 5, and air is blown by these blowers 6, 7 to exchange heat. In addition, the indoor blower 7 blows out the heat exchanged airflow through the indoor heat exchanger 5 into the room to form convection.

Reference numeral 8 is an indoor control device, and 9 is an outdoor control device, each of which is formed by a microcomputer. The indoor control device 8 is connected to a heat exchange temperature sensor 10 that detects a condensation temperature of the indoor heat exchanger 5 during cooling or an evaporation temperature Te during heating, and an indoor temperature sensor 11 that detects an indoor temperature Ta. There is.

The indoor control device 8 controls the rotation speed of the indoor blower 7, the elevation angle control of the louver 13, and the compression based on the switch input from the remote control device 12 and the inputs from the heat exchange temperature sensor 10 and the indoor temperature sensor 11. It has a function of selecting an inverter operating frequency value of the machine 1 and controlling the operation of the entire air conditioner. The louver 13 changes the direction of air blown by the indoor blower 7, and as shown in FIG.
8 is mounted so as to be pivotally displaceable around the pivot 13a.

The drive motor 14 of the indoor blower 7 is connected to the indoor blower control means 15, and the output of the indoor blower control means 15 is controlled by the indoor control device 8. Also,
By controlling the rotational position of the louver control means 16 by the indoor control device 8, the elevation angle of the louver 13 is controlled.

The outdoor control device 9 identifies the operation command contents of the operation mode and the inverter operating frequency value from the serial signal sent from the indoor control device 8, and the instruction contents, the current sensor (not shown) and the outdoor device. The output frequency of the inverter (variable frequency device) 17 of the compressor 1 is controlled by the temperature data of the heat exchange temperature sensor (not shown) so as to avoid an overcurrent or an overheated state, and the rotation speed of the compressor 1 is controlled. Variable speed operation is performed at 15 to 120 Hz to control the capacity. Therefore, the inverter 17 that performs variable capacity control of the compressor 1 is
Normally, the frequency is controlled based on the inverter frequency value selected by the indoor control device 8.

Further, the outdoor control device 9 controls the opening degree of the expansion valve 4 so that the refrigerating cycle state during operation such as the cooling mode and the heating mode is optimized. That is, during the cooling operation, the cycle at that time is judged based on the temperature between the expansion valve 4 and the indoor / outdoor piping connection, and the temperature at the inlet of the compressor 1 so that the optimum cycle state is obtained. Expansion valve 4
Control the opening degree of. Similarly, during heating operation, the expansion valve 4
The opening degree of the expansion valve 4 is controlled based on the temperature between the outdoor heat exchanger 3 and the temperature of the inlet of the compressor 1.

Therefore, when the operating frequency value of the inverter 17 changes by 1 / f ² fluctuation, the outdoor controller 9 automatically controls the expansion valve opening degree, so that the indoor blowing temperature is 1 / f.
² Fluctuations will change.

In the memory (not shown) of the indoor control device 8, the number of revolutions of the indoor blower 7, the elevation angle of the louver 13, and the time series control pattern for controlling the fluctuation of the operating frequency value of the inverter 17 are stored in advance. I remember several types. The characteristic of this time-series control pattern is that the power spectrum is inversely proportional to the frequency for the indoor blower rotation speed and the louver angle, and the power spectrum is inversely proportional to the square of the frequency for the inverter operating frequency value.

In creating the time series control pattern, as a method for obtaining arbitrary pattern data of 1 / f ⁱ fluctuation (0≤i≤2), for example, the following method of integrating random number sequence data by a random function There is.

That is, when the appropriately determined time series data is differentiated n times, its power spectrum is proportional to f ²ⁿ .
This holds even when n takes a negative value (meaning integration). Thus, by integrating n times time-series data of the random number sequence, 1 / f ²ⁿ fluctuation pattern data where the power spectrum is proportional to 1 / f ²ⁿ is obtained.

Therefore, the formula 1 is a formally converted into an expression corresponding to the integration, considering n times differentiation of the data string X at the discrete time interval t. However, when r = 0, the coefficient of Xm is 1.

[0039]

[Equation 1]

By using a random number sequence for the data sequence X, Ym becomes time series data having 1 / f ²ⁿ fluctuation. If an appropriate value is selected for N and calculation is performed with n = 0.5, time-series data with 1 / f fluctuation is obtained. Also,
When calculated with n = 1, it becomes time-series data with 1 / f ² fluctuation. The time-series data thus obtained is quantized in several stages in order to make it practical control data. The time series control pattern can be created as described above.

First, for control of the number of revolutions of the indoor blower 7, N = 700 and n = 0.5 are substituted into the equation 1 to obtain 256 1 / f fluctuation time series data, which are quantized into 5 stages. . FIG. 2 shows the time-series control pattern for controlling the rotation speed of the indoor blower 7 obtained by this, and FIG. 3 shows the frequency characteristic in that case. As shown in FIG. 3, the frequency characteristic is such that the power spectrum is inversely proportional to the frequency.

[0042]

[Table 1]

Table 1 above shows an example of a control pattern group showing the correspondence between the above-mentioned five stages of control data and the rotation speed of the indoor blower 7. For example, in the case of the control pattern F1, 5
The stage control data {f1, f2, f3, f4, f5} is {800, 850, 900, 950, 1000 rpm.}, And at the time of f1, the indoor blower control means 15 has an indoor blower rotation speed of 80.
Control to be 0 rpm. Here, the indoor blower 7
Since the number of data of the control pattern is 256, if the data switching step time is 15 seconds, the time of one cycle of the control pattern is 64 minutes.

Next, for control of the elevation angle of the louver 13, N = 700 and n = 0.5 are substituted into the formula 1 to obtain 128 1 / f fluctuation time series data, which are quantized into 5 steps. . FIG. 4 shows the time-series control pattern for controlling the elevation angle of the louver 13 obtained by this, and FIG. 5 shows the frequency characteristic in that case. As shown in FIG. 5, the frequency characteristic of the power spectrum is inversely proportional to the frequency, as in the case of the indoor blower rotation speed control.

Table 2 shown below shows an example of a control pattern group showing the correspondence between the above-mentioned five-step control data and the elevation angle of the louver 13. However, in FIG. 6, the elevation displacement angle θ ₁ of the louver 13 displaced from the solid line position to the broken line position is defined by the angular deviation from the reference position rotated downward by a predetermined angle θ ₀ from the horizontal position. .

[0046]

[Table 2]

For example, in the case of the control pattern R1, the control data of 5 steps {r1, r2, r3, r4, r5} is {20,
15, 10, 5, 0 °}, and at r1, the louver control means 16 controls so that the angle θ ₁ becomes 20 °, that is, θ ₀ + 20 ° from the horizontal position. Here, since the number of data of the louver angle control pattern is 128, assuming that the data switching step time is 30 seconds, the time of one cycle of the control pattern is 64 as in the indoor blower 7.
It will be a minute.

Finally, for selecting the operating frequency value of the inverter 17, N = 700 and n = 1 are substituted into the equation 1 to obtain 6
Four 1 / f ² fluctuation time series data are obtained and quantized in 5 steps. FIG. 7 shows the time-series control pattern for selecting the operating frequency value of the inverter 17 obtained by this,
FIG. 8 shows the frequency characteristics in that case. As shown in FIG. 8, the power spectrum of the frequency characteristic is inversely proportional to the square of the frequency.

[0049]

[Table 3]

Table 3 shows an example of a control pattern group showing the correspondence between the above-mentioned five-step control data and the inverter operating frequency. The indoor control device 8 receives a switch input from the remote control device 12, that is, an operation mode setting input for cooling, heating, dehumidification, etc. and a set temperature input (or a predetermined control target temperature when the automatic operation mode is selected). ), The input from the heat exchange temperature sensor 10 and the input from the indoor temperature sensor 11, first, the reference value of the inverter operating frequency at that time is determined.

Then, the deviation value shown in Table 3 is added to the reference value to determine the inverter operating frequency value for fluctuation control. However, as a result of adding the deviation value, when the variable speed range of the compressor 1 is exceeded, the restriction of the variable speed range has priority. The variable speed range of the compressor 1 is 15 to 60 Hz during cooling operation and 15 to 1 Hz during heating operation.
It is within the range of 20 Hz.

The number of revolutions of the indoor blower 7 and the louver 13
The fluctuation control of the depression / elevation angle and the operating frequency value of the inverter 17 is realized by repeating the time-series data for one cycle time that is appropriately set, but one cycle time of each controlled object is made equal as described above. As a result, the comfort effect of the fluctuation control of the three controlled objects can be included in a certain time at the same ratio, and the well-balanced mix fluctuation control can be performed.

As described above, the control step time of each controlled object is set such that the inverter operating frequency value is 60 seconds, the louver angle is 30 seconds, and the indoor blower rotation speed is 15 seconds. By making the control time of the control of the louver the longest, the time of the louver angle control the second, and the time of the control of the indoor blower rotation speed the shortest, it is possible to create fluctuations in the wind speed that are relatively small. It is possible to perform the mix fluctuation control suitable for the sensitivity of the warm feeling of.

FIG. 9 shows a model of the temporal transition of the room temperature detected by the indoor temperature sensor 11 in the cooling operation mode, and FIG.
Shows an example of a determination flowchart in which a microcomputer (not shown) of the indoor control device 8 in the same mode determines a control pattern. Further, Table 4 shows an example of selection of control patterns during that period.

[0055]

[Table 4]

Now, referring to the flowchart of FIG. 10 and referring to the graph of FIG. 9, the operation of the air conditioner having the above configuration in the cooling operation mode will be described. At step # 1, the room temperature reaches the set temperature at the initial stage of operation. When the difference is larger than 2 ° C. (t _{0 to} t ₁ ), the indoor blower rotation speed is strong in the pattern F of step # 1a in step # 1a.
5, the louver angle has an eye pattern R5 with a large change amplitude, and the inverter operating frequency has a strong eye pattern D.
5 is selected. In this case, the cooling feeling is increased by controlling fluctuation with large amplitude although the room temperature is high.

When the difference between the room temperature and the set temperature is reduced to 1 to 2 ° C. (t _{1 to} t ₂ ) (step # 2), the indoor blower rotation speed is the weak pattern F4, and the louver angle shows the change amplitude. The small eye pattern R4 and the eye pattern D4 having a weak inverter operating frequency value are selected (step # 2).
a). When the difference between the room temperature and the set temperature becomes smaller at 0 to 1 ° C. (t _{2 to} t ₃ ) (step # 3), each controlled object selects weaker eye patterns F3, R3, and D3 (step # 3). 3a).

Then, once the detected room temperature becomes equal to the set temperature, in step # 4, the weaker pattern F2, R2, D2 than that in step # 3a is selected as the time-series control pattern of each controlled object. At the above, the room temperature is controlled to hunt at (set temperature + 1 ° C) ± 0.5 ° C.

The reason for performing the above control is that the temperature is once lowered to the set temperature at the start of the cooling operation, but thereafter, the room temperature is set to the temperature intended by the user due to the cooling feeling improving effect of the mix fluctuation control including the air volume and the air direction. This is to prevent the generation of an unhealthy air-conditioned atmosphere due to too cold, while at the same time providing the same feeling of comfort without lowering the power consumption, and at the same time to save power. In this way, as the difference from the set temperature becomes smaller, the fluctuation is weakened and the equilibrium state is brought about, so that the discomfort at the initial stage of operation can be suppressed.

After entering the hunting operation state, when the temporal decrease rate of the detected room temperature exceeds a predetermined value (1 ° C./min in this embodiment) (t _{4 to} t ₅ ) (step # 5), the cooling load is set. There is judged to have decreased, the weakest eye pattern F1, R1, D1 is selected as the time-series control pattern for the controlled object (t ₅ ~t ₆₎ (step # 5a). Further, when returning to the hunting range again (step # 5b), the pattern F
2, R2, back to D2 (t ₆₎ (step # 5c).

On the other hand, when the temporal rise rate of the detected room temperature exceeds the predetermined value (1 ° C./min in this embodiment) (t _{7 to} t ₈ ).
(Step # 6), it is determined that the cooling load is increased, the stronger eye pattern F4 as time-series control pattern for the controlled object, R4, D4 is selected (t ₈ ~t ₉₎ (step # 6a) . When the room temperature falls to the center value in the hunting range (step # 6b), patterns F3 and R
3, back to the D3 (t ₉ ~t ₁₀₎ (step # 6c).

Further, if the value falls to the lower limit of the hunting range (step # 7) and does not exceed the upper limit of the hunting range (step # 8), the patterns F2 and R are used.
2, back to D2 (t ₁₀₎ (step # 9). When the stability in the hunting range is maintained in step # 7, the patterns are returned to the weakest patterns F1, R1, and D1 (step # 7a), and when the hunting range is exceeded in step # 8, step # 7 Return to 1.

By repeating the above-mentioned operation, when the room temperature changes due to load fluctuation, the fluctuation range is suppressed, and the temperature is returned to the control target temperature range without impairing the cooling comfort feeling.
So-called load fluctuation follow-up control can be performed.

FIG. 11 shows a model of the temporal transition of the room temperature detected by the indoor temperature sensor 11 in the heating operation mode.
2 shows an example of a determination flowchart in which the microcomputer (not shown) of the indoor control device 8 in the same mode determines a control pattern. Further, Table 5 shows an example of selection of control patterns in the meantime.

[0065]

[Table 5]

The operation in the heating operation mode is step # 1.
When the room temperature does not reach the set temperature at the initial stage of operation in 1 and the difference is larger than 2 ° C. (t _{20 to} t ₂₁ ), in step # 11a, the indoor blower rotation speed is the pattern F5 and the louver angle is The pattern R10 is selected and the inverter operating frequency value is selected as the pattern D5. In this case, the thermal sensation is increased by controlling the fluctuation with large amplitude although the room temperature is low.

When the difference between the room temperature and the set temperature is reduced to 1 to 2 ° C. in step # 12 (t _{21 to} t ₂₂ ), pattern F
4, R9 and D4 are selected (step # 12a). When the difference between the room temperature and the set temperature is further reduced to 0 to 1 ° C. (t _{22 to} t ₂₃ ) (step # 13), patterns F3 and R are generated.
8 and D3 are selected (step # 13a). Once the detected room temperature becomes equal to the set temperature, in step # 14,
After selecting the patterns F2, R7, and D2, the room temperature is controlled to hunt by (set temperature + 1 ° C.) ± 0.5 ° C.

When the temporal decrease rate of the detected room temperature exceeds the predetermined value after entering the hunting operation state (t _{24 to} t ₂₅ ).
(Step # 15), the pattern F1, R6, D1 is selected (t ₂₅ ~t ₂₆₎ (step # 15a). Further, when returning to the hunting range again (step # 15b),
Return to patterns F2, R7, D2 (t ₂₆ ) (step #
15c).

On the other hand, if the temporal increase rate of the detected room temperature exceeds the predetermined value (t _{27 to} t ₂₈ ) (step # 16), the patterns F4, R9 and D4 are selected (t _{28 to} t _29). ) (Step # 16a). Further, when the room temperature drops to the center value of the hunting range (step # 16b), return to the pattern _{F3, R8, D3 (t 29} ~t 30) ( step #
16c). Further, if the value falls to the lower limit of the hunting range (step # 17) and does not exceed the upper limit of the hunting range (step # 18), the pattern F2,
R7, back to D2 (t ₃₀₎ (step # 19).

As described above, the heating operation mode is different from the above-described cooling operation mode only in that the relationship between the detected room temperature and the set temperature and the relationship between the room temperature change and the load increase / decrease are opposite. The comfort effect of fluctuation control is the same.

[0071]

As described above, in the air conditioner of the present invention, the power spectrum of the rotational speed of the indoor blower is inversely proportional to the frequency by the indoor control device, the power spectrum of the louver angle is inversely proportional to the frequency, and the inverter operation is performed. Since the power spectrum of the frequency value is controlled so as to fluctuate at the same time so that it is inversely proportional to the square of the frequency, it relates to the amount of air blown by the indoor blower, the wind direction regulated by the louver, and the state of the refrigeration cycle. The blowing temperature can be controlled by a fluctuation characteristic according to the sensitivity of human's thermal sensation. Therefore, the feeling of comfort can be significantly improved as compared with the conventional one.

According to the second aspect, since one cycle time of each fluctuation control of the rotation number of the indoor blower, the angle of the louver, and the operating frequency value of the inverter in the indoor control device is set to be the same, each fluctuation is set. Fluctuation control that mixes the effects in a well-balanced manner can be performed.

According to the third aspect of the present invention, since the step time that constitutes the fluctuation control periodic pattern is set to decrease in the order of the operating frequency value of the inverter, the angle of the louver, and the rotation speed of the indoor blower, comparison is made. The fluctuation of the wind speed can be obtained in small increments, and the mix fluctuation control suitable for the sensitivity of human thermal sensation can be performed.

According to the fourth to the eighth aspects, the rotation number of the indoor blower, the angle of the louver, and the operating frequency value of the inverter are selected by the indoor control device based on the difference between the set temperature and the detected room temperature. Since the fluctuations are controlled by different fluctuation control patterns, when the room temperature approaches the set temperature and the difference becomes small, the fluctuation fluctuation of the louver angle is small. Regarding the operating frequency value, by selecting the eye fluctuation control pattern with weak ability,
In particular, it is possible to suppress discomfort until the room temperature reaches the set temperature at the initial stage of operation.

Further, according to the present invention, by exerting the above-mentioned mix fluctuation effect, the control temperature can be higher than that of the conventional one while giving the same feeling of air conditioning comfort. Therefore, a healthy air conditioner that is not overly cold or overheated, Power saving air conditioning can be performed. Finally, it is possible to perform load fluctuation follow-up control with respect to fluctuations in the heating / cooling load, without impairing the comfort of air conditioning and suppressing the temperature fluctuation width.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an air conditioner to which the present invention is applied.

FIG. 2 is a diagram showing an example of a control pattern of an indoor blower rotation speed.

FIG. 3 is a diagram showing frequency characteristics of the time series control data.

FIG. 4 is a diagram showing an example of a louver angle control pattern.

FIG. 5 is a diagram showing frequency characteristics of the time series control data.

FIG. 6 is a schematic cross-sectional view showing an enlarged form of posture displacement of the louver.

FIG. 7 is a diagram showing an example of a control pattern of an inverter operating frequency value.

FIG. 8 is a diagram showing frequency characteristics of the time series data.

FIG. 9 is a diagram showing a temporal transition of a detected room temperature in a cooling operation mode.

FIG. 10 is a determination flowchart for selecting a control pattern in a cooling operation mode.

FIG. 11 is a diagram showing an example of time transition of the detected room temperature in the heating operation mode.

FIG. 12 is a determination flowchart for selecting a heating operation mode control pattern.

FIG. 13 is a characteristic diagram for explaining fluctuations in various frequency characteristics.

[Explanation of symbols]

 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Expansion valve 5 Indoor heat exchanger 6 Outdoor blower 7 Indoor blower 8 Indoor control device 9 Outdoor control device 10 Heat exchange temperature sensor 11 Indoor temperature sensor 12 Remote control device 13 Louver 14 Indoor Blower drive motor 15 Indoor blower control means 16 Louver control means 17 Inverter

Claims (8)

[Claims] 1. A refrigeration cycle formed by sequentially connecting a variable capacity compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, and an air flow blown into the room through the indoor heat exchanger. Indoor blower, indoor blower control means for controlling the number of revolutions of the indoor blower, louvers capable of changing the attitude to change the wind direction of the blower by the indoor blower, louver control means for controlling the angle of the louver, and the compression An indoor air blower control means, a louver control means, and an indoor control device that controls the output of the inverter, and the indoor control device controls the power spectrum of the rotation speed of the indoor blower to a frequency. And the power spectrum of the louver angle is inversely proportional to the frequency, and further, the power spectrum of the operating frequency value of the inverter is An air conditioner characterized in that the fluctuations of the cutlers are simultaneously controlled so that the cutlers are inversely proportional to the square of the frequency. 2. The air conditioner according to claim 1, wherein one cycle time of each fluctuation control of the rotation speed of the indoor blower, the angle of the louver, and the operating frequency value of the inverter is set to be the same in the indoor control device. 3. The step time that constitutes the periodic pattern of fluctuation control by the indoor control device is set so that the operating frequency value of the inverter, the angle of the louver, and the rotation speed of the indoor blower become shorter in this order. Air conditioner. 4. The indoor control device incorporates a plurality of different fluctuation control patterns, and the indoor control device determines the rotational speed of the indoor blower, the angle of the louver, and the operating frequency value of the inverter, between the set temperature and the detected room temperature. The air conditioner according to claim 1, wherein fluctuation control is performed by one of the fluctuation control patterns selected based on a difference. 5. When the indoor control device determines that the increase rate of the detected room temperature is larger than a predetermined value during the fluctuation control operation in the cooling operation mode, the louver angle has a large change amplitude. The air conditioner according to claim 4, wherein the fluctuation control pattern is configured to select an eye fluctuation control pattern having a high ability with respect to the rotation speed of the indoor blower and the operating frequency value of the inverter. 6. When the indoor control device determines that the rate of increase in the detected room temperature is higher than a predetermined value during the fluctuation control operation in the heating operation mode, the louver angle has a small change amplitude. The air conditioner according to claim 4, wherein the fluctuation control pattern is configured to select an eye fluctuation control pattern having a weak performance with respect to the rotation speed of the indoor blower and the operating frequency value of the inverter. 7. The indoor control device, when it is determined during the fluctuation control operation in the cooling operation mode that the rate of decrease of the detected room temperature is higher than a predetermined value, the louver angle has a small change amplitude. The air conditioner according to claim 4, wherein the fluctuation control pattern is configured to select an eye fluctuation control pattern having a weak performance with respect to the rotation speed of the indoor blower and the operating frequency value of the inverter. 8. The indoor control device, when it determines that the rate of decrease of the detected room temperature is larger than a predetermined value during the fluctuation control operation in the heating operation mode, changes the louver angle with a large amplitude of change. The air conditioner according to claim 4, wherein the fluctuation control pattern is configured to select an eye fluctuation control pattern having a high ability with respect to the rotation speed of the indoor blower and the operating frequency value of the inverter.