JP2014206304A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple-room air conditioner capable of being appropriately controlled in response to a large change in the heat environment of a used part.SOLUTION: A multiple-room air conditioner S comprises: an online system identification unit 47 that momentarily identifies parameters representing a capability relation between states of used-part heat environments resulting from at least heat capacities and overall heat transfer coefficients of used parts 161 and 162 where air conditioners 91 and 92 are arranged, respectively and a drive frequency of a compressor 2; a feedback arithmetic unit 44; detection means for detecting respective controlled valuables; operation means for operating respective operation amounts; and setting units 311 and 312. The online system identification unit 47 is a least square online system identification unit that identifies and outputs parameter-estimated-value signal vectors representing dynamic characteristics of the used parts 161 and 162 each in the context of a least square, and is characterized by changing a standard coefficient for identifying and outputting the parameter-estimated-value signal vectors depending on the parameters.

Description

  The present invention relates to an air conditioner.

  For example, Patent Document 1 states that “the present multi-room air conditioner has a thermal environment state of the utilization unit 161 and the like that have at least the factors of room heat capacity and heat passage coefficient, and the driving frequency of the compressor 2 and the multi-room air conditioner. A control arithmetic unit 32 having an online system identifier 47 and a feedback arithmetic unit 44 for identifying a coefficient representing the relationship with the machine capability from time to time based on a plurality of predetermined observation amounts. (See summary).

Japanese Patent Laid-Open No. 9-21574

  In the multi-room air conditioner described in Patent Document 1, it is desirable to use a positive constant as a normative coefficient used for obtaining an optimum operation amount of the compressor by a feedback calculator. However, in such a multi-room air conditioner, the coefficient used for the control may exceed the compatible range with respect to a large change in the thermal environment of the utilization unit, and a suitable control state may not be maintained.

  For example, if the coefficient of the norm used to calculate the optimum amount of compressor operation when a multi-room air conditioner is operated for heating is a constant near the rated output, the use section (heats in the environment corresponding to the rated output) The temperature of the living room etc. can be adjusted suitably, but when the heating part is in a situation where it is heated by heat passing or the like, in a state where heating is not so necessary, the usage part is preferred due to overshoot. The temperature may not be adjusted.

  Then, this invention makes it a subject to provide the air conditioner suitably controlled with respect to the big change of the thermal environment of the utilization part which performs an air conditioning.

  In order to solve the above-described problems, the present invention provides an on-line system identifier for system identification of an air conditioner that sequentially identifies parameters indicating the characteristics of a utilization unit and, based on the identified parameters, a coefficient of a norm used for control. It has the feature of changing.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioner suitably controlled with respect to the big change of the thermal environment of the utilization part which air-conditions can be provided.

It is a block diagram of the multi-room air conditioner concerning the example of the present invention. It is a graph which shows the state in which utilization part room temperature overshoots. It is an example of the map which shows the relationship between the heat passage coefficient of a utilization part, and the coefficient of a norm. It is a graph which shows the state which the indoor temperature of a utilization part converges on setting temperature, without overshooting. It is a flowchart which shows the procedure in which a control arithmetic unit controls a multi-room air conditioner.

  Hereinafter, embodiments of the present invention will be described in detail with appropriate reference to the drawings.

FIG. 1 is a block diagram of a multi-room air conditioner according to an embodiment of the present invention. Moreover, FIG. 2 is a graph which shows the state in which utilization part room temperature overshoots, the vertical axis | shaft shows the indoor temperature of a utilization part, and the horizontal axis has shown time.
As shown in FIG. 1, the air conditioner of the present embodiment includes an outdoor unit 1 and a plurality of (for example, two) indoor units 91 and 92, and the outdoor unit 1 and a plurality of indoor units 91 and 92. Is a multi-chamber air conditioner S connected by piping to a closed circuit and filled with refrigerant.
The outdoor unit 1 is provided with an outdoor fan 4 that is connected to a frequency variable compressor 2, an outdoor heat exchanger 3, and an outdoor electronic expansion valve 8, and that blows air to the outdoor heat exchanger 3.
Note that the present invention is not limited to the multi-room air conditioner S in which a plurality of (for example, two) indoor units 91 and 92 are disposed, and is an air conditioner in which one indoor unit 91 is disposed. May be.

  The indoor units 91 and 92 include indoor heat exchangers 101 and 102 that exchange heat between the indoor air and the refrigerant, and indoor electronic expansion valves 121 and 122 that adjust the flow rate of the refrigerant in the indoor heat exchangers 101 and 102. Indoor fans 111 and 112 that are sequentially connected by piping and blown to the indoor heat exchangers 101 and 102 are provided.

  Furthermore, the multi-room air conditioner S includes a use part thermal environment state that is caused at least by the heat capacity and heat passage coefficient of the room (the use parts 161 and 162) in which the indoor units 91 and 92 are disposed, and a compressor. 2 includes an on-line system identifier 47 and a feedback calculator 44 that identify a parameter representing the relationship between the drive frequency of 2 and the capacity of the multi-room air conditioner S from time to time based on a plurality of predetermined observation amounts. A control arithmetic device 32 is provided.

  The outdoor unit 1 includes an accumulator 5, a four-way valve 6, and a receiver 7. Then, the gas side and the liquid side of the outdoor unit 1 and the indoor units 91 and 92 are connected by the gas side pipe line 13, the liquid side pipe line 14 and the branch pipes 151 and 152, respectively, to form a closed circuit. A refrigerant is sealed in the inside.

  The outdoor unit 1 of the multi-room air conditioner S includes an outdoor temperature detector 17, a compressor refrigerant discharge temperature detector, and a refrigerant superheat degree calculator that detect the outdoor temperature (the outdoor temperature of the utilization units 161 and 162). Compressor refrigerant discharge superheat detector 18, compressor refrigerant suction pressure detector 19 for detecting compressor refrigerant suction pressure, compressor refrigerant discharge pressure detector 20 for detecting compressor refrigerant discharge pressure, and compressor 2. A compressor power detector 21 that detects power consumption and an outdoor fan power detector 24 that detects power consumption of the outdoor fan 4 are provided as detection means. Further, the outdoor unit 1 includes an inverter compressor operating unit 22 that operates the driving frequency of the compressor 2, an outdoor blowing capacity operating unit 23 that operates the blowing capacity (rotational speed) of the outdoor fan 4, and an outdoor electronic expansion valve 8. An outdoor electronic expansion valve opening controller 25 for operating the opening is provided as an operating means.

  The utilization units 161 and 162 include utilization unit indoor temperature detectors 261 and 262 that detect the indoor temperatures of the utilization units 161 and 162, and utilization unit blowing temperature detectors that detect the blowing temperature to the utilization units 161 and 162. 271 and 272 and indoor fan power detectors 291 and 292 for detecting the power of the indoor fans 111 and 112 are provided as detection means. Further, the utilization units 161 and 162 are operated to control the refrigerant circulation amount of the indoor electronic expansion valves 121 and 122 and the indoor air blowing capacity controllers 281 and 282 for operating the blowing capacity (rotational speed) of the indoor fans 111 and 112. Indoor electronic expansion valve opening operation devices 301 and 302 are provided as operation means. In addition, the utilization units 161 and 162 are provided with setting units 311 and 312 for storing preset setting values or setting the thermal environment of the user's preference as setting means.

The control arithmetic device 32 that controls the multi-room air conditioner S configured as described above sequentially updates the gain (feedback gain) in the feedback arithmetic unit 44 based on the parameters that the online system identifier 47 sequentially identifies, The multi-room air conditioner S is feedback-controlled.
The principle by which the online system identifier 47 of the present embodiment identifies the multi-room air conditioner S (system identification) and the technology by which the control arithmetic unit 32 controls the multi-room air conditioner S are described in Patent Document 1 described above. The following is a brief description.

  The control arithmetic device 32 of the present embodiment uses the set temperature (set value r (k)) set by the user with the setting devices 311 and 312 as the target temperature, and the room temperature (control amount x (k) of the use units 161 and 162. )) And feedback control of the multi-room air conditioner S so as to eliminate the deviation (x (k) -r (k)) of the set value r (k) that is the target temperature of each of the utilization units 161 and 162 . Note that (k) is a variable indicating a time series, and (k + 1) indicates the next of (k) in time series.

  Whether it is a continuous-time system or a discrete-time system, or a first-order lag system or a higher-order lag system, a one-input one-output system or a multi-input multi-output system, is the design specification of the multi-room air conditioner S and the control target The order determination result depends on the linearization method, and the analysis and design methods are also different. Here, a discrete time system, a first-order lag system, a one-input one-output system, and a system without dead time will be described.

式（１）に示す制御量ｘ（ｋ）、操作量ｕ（ｋ）は、一例として、それぞれ利用部１６１，１６２の室内温度、圧縮機２の駆動周波数である。また、パラメータａ，ｂは、利用部１６１，１６２の熱容量や熱通過係数などの特性を表す数である。パラメータａ，ｂは、利用部１６１，１６２の特性に依存する値であるため、多室空気調和機Ｓの設計値として一概に決定することができない未知の数となる。 The multi-room air conditioner S of the present embodiment includes a driving frequency of the compressor 2, a rotation speed of the outdoor fan 4, a valve opening degree of the outdoor electronic expansion valve 8, a rotation speed of the indoor fans 111 and 112, and an indoor electronic expansion valve 121. , 122, the operation amount such as the valve opening degree is u (k), the disturbance is v (k), the control amount such as the room temperature of the utilization unit 161, 162 is x (k), and the utilization unit 161, 162 The parameters indicating the characteristics are modeled into a time series model as shown in the following equation (1), where a and b are parameters.

The control amount x (k) and the manipulated variable u (k) shown in Expression (1) are, for example, the room temperature of the utilization units 161 and 162 and the driving frequency of the compressor 2, respectively. The parameters a and b are numbers representing characteristics such as heat capacity and heat passage coefficient of the utilization units 161 and 162. Since the parameters a and b are values that depend on the characteristics of the utilization units 161 and 162, the parameters a and b are unknown numbers that cannot be generally determined as the design values of the multi-room air conditioner S.

式（２）のα，βは、多室空気調和機Ｓの性能を示すパラメータであり、多室空気調和機Ｓの特性値（設計値）として予め決定されている値である。 In addition, the amount of power W (k) consumed by the compressor 2 is represented by the following equation (2).

Α and β in the equation (2) are parameters indicating the performance of the multi-room air conditioner S, and are values determined in advance as characteristic values (design values) of the multi-room air conditioner S.

なお、「ｋ＝０」のときの初期値θ”（０）は予め与えられている。 Then, the online system identifier 47 identifies the parameters a and b in Expression (1). At this time, the on-line system identifier 47 performs on-line system identification in which identification is performed simultaneously with observation.
The online system identifier 47 represents the estimated values of the parameters a and b as a ″ (k) and b ″ (k), and uses the vectors to estimate the elements a ″ (k) and b ″ (k). A vector (parameter estimated value signal vector) θ ″ (k) is defined as in the following equation (3).

The initial value θ ″ (0) when “k = 0” is given in advance.

なお、式（４）の変数「ｙ（ｋ）」は、制御量ｘ（ｋ）の観測値を示す信号（検知信号）を示す。例えば、制御量ｘ（ｋ）が利用部１６１，１６２の室内温度の場合、検知信号ｙ（ｋ）は、利用部室内温度検知器２６１，２６２が利用部１６１，１６２の室内温度を検知したときに出力する信号になる。
つまり、観測ベクトルＺ（ｋ）は、検知信号ｙ（ｋ）と操作量ｕ（ｋ）を要素とするベクトルである。 The online system identifier 47 defines the observation vector Z (k) as in the following equation (4).

Note that the variable “y (k)” in Expression (4) indicates a signal (detection signal) indicating the observed value of the controlled variable x (k). For example, when the control amount x (k) is the room temperature of the utilization units 161 and 162, the detection signal y (k) is obtained when the utilization unit room temperature detectors 261 and 262 detect the room temperature of the utilization units 161 and 162. It becomes a signal to output to.
That is, the observation vector Z (k) is a vector having the detection signal y (k) and the manipulated variable u (k) as elements.

For example, if the parameter estimated value signal vector θ ″ (k) represented by the expression (3) is designed so as to minimize the value J _{I represented} by the following expression (5), the sequential estimation represented by the following expression (6) is performed. A form of calculation is required.

  The online system identifier 47 includes an operation amount signal vector whose element is a signal regarding the operation amount u (k), a detection signal vector whose element is a detection signal y (k) detected by each detection means, Is entered. Then, the online system identifier 47 sets an observation vector Z (k) shown in Expression (4) based on the input manipulated variable signal vector and the detected signal vector, and sets the parameter estimated value signal vector θ ″ ( k).

また、本実施例のオンラインシステム同定器４７は、式（７）で示される二次規範（二次式）を最小とするように最適解を求めるものであり、最小二乗オンラインシステム同定器になる。
オンラインシステム同定器４７が最適解を求めるとき、式（７）に含まれる利用部１６１，１６２の室内温度を制御量ｘ（ｋ）として、同定されたパラメータａ，ｂを含む多室空気調和機Ｓの時系列モデル（式（１））が利用される。 In controlling the multi-room air conditioner S, the online system identifier 47 obtains an optimal solution that minimizes a standard (control standard) expressed by a quadratic expression as in the following formula (7), 32 controls the multi-room air conditioner S based on the feedback gain determined thereby. The norm used in this embodiment is a secondary norm of control accuracy and power consumption.

Further, the online system identifier 47 of the present embodiment obtains an optimal solution so as to minimize the quadratic norm (secondary equation) expressed by the equation (7), and becomes the least square online system identifier. .
When the online system identifier 47 obtains the optimum solution, the multi-room air conditioner including the identified parameters a and b with the room temperature of the utilization units 161 and 162 included in the equation (7) as the control amount x (k) A time series model of S (formula (1)) is used.

なお、式（８）において、外乱ｖ（ｋ）は室外気温等のように検知可能する。また、制御量ｘ（ｋ）となる室内温度は、利用部室内温度検知器２６１，２６２によって直接計測可能（観測可能）である。したがって、検知信号ｙ（ｋ）のフィードバック形として下式（９）に示す形の出力信号ベクトルｕ^０（ｋ）が使用される。

The optimum feedback gain (K ₁ , K ₂ , K ₃ ) and bias (f) are obtained by dynamic programming or the like, and an output signal vector u ⁰ (k) having the form shown in the following equation (8) is determined. Is done.

In equation (8), the disturbance v (k) can be detected like the outdoor temperature. Further, the indoor temperature that becomes the control amount x (k) can be directly measured (observable) by the utilization unit indoor temperature detectors 261 and 262. Therefore, the output signal vector u ⁰ (k) having the form shown in the following equation (9) is used as the feedback form of the detection signal y (k).

The initial values of the feedback gain (K ₁ , K ₂ , K ₃ ) and the bias (f) shown in Expression (9) are determined based on prior information of the parameters a, b, α, and β. Then, the control arithmetic device 32 operates the compressor 2 at a driving frequency included as an element in the output signal vector u ⁰ (k) calculated by the equation (9).

  As described above, the principle of identification (system identification) by the online system identifier 47 and the principle of determining the feedback gain use the technique described in Patent Document 1, and details thereof are described in Patent Document 1 will be described.

For example, the feedback calculator 44 includes a parameter estimated value signal vector θ ″ (k), a vector (detection signal vector) having the detection signal y (k) as elements, and a vector (element) having the set value r (k) as elements. The feedback calculator 44 is configured such that the COP (Coefficient Of Performance) is maximized with respect to each input vector. A feedback gain (K ₁ , K ₂ , K ₃ ) and a bias (f) are determined, and an output signal vector u ⁰ (k) shown in equations (8) and (9) is output.

In this way, the feedback computing unit 44 uses the input vectors (parameter estimated value signal vector θ ″ (k), detection signal vector having the detection signal y (k) as elements, and the set value r (k) as elements. Function as a feedback manipulated variable calculator that determines the output signal vector u ⁰ (k) so that the COP is maximized with respect to the set value signal vector).

As described above, in the process of determining the output signal vector u ⁰ (k), if the normative coefficient n shown in the equation (7) is determined to be a constant assuming the rated operation of the compressor 2, Depending on the state of the units 161 and 162, as shown in FIG. 2, overshoot may occur in the adjustment of the room temperature of the use units 161 and 162 (temporal change in the room temperature).

For example, when the control arithmetic device 32 operates the compressor 2 at a drive frequency included as an element in the output signal vector u ⁰ (k), the room temperatures of the utilization units 161 and 162 may overshoot.
This is caused by requesting the compressor 2 to have the same capacity for the utilization units 161 and 162 having different characteristics such as a heat passage coefficient. That is, it occurs by setting the same value to the normative coefficient n shown in Expression (7) for the utilization parts 161 and 162 having different characteristics such as a heat passage coefficient.

  For example, as the utilization part has a larger heat passage coefficient, the disturbance to the operation of the compressor 2 increases, and the capacity required of the compressor 2 increases. Therefore, when the multi-room air conditioner S is operated for heating, the use section having a larger heat passage coefficient is more susceptible to the influence of low temperature outside air, and the use section indoor temperature is drastically decreased. Becomes larger.

Therefore, the multi-room air conditioner S of the present embodiment is configured to determine the normative coefficient n represented by the equation (7) according to the heat passage coefficient of the utilization units 161 and 162.
It should be noted that the normative coefficient m shown in Expression (7) is not a value that greatly affects the adjustment of the room temperature as much as the coefficient n, but may be set to a constant such as “1”, for example.

  FIG. 3 is an example of a map showing the relationship between the heat passage coefficient of the utilization part and the normative coefficient, and FIG. 4 is a graph showing a state in which the room temperature of the utilization part converges to the set temperature without overshooting, and the vertical axis is The room temperature of the utilization part and the horizontal axis indicate time.

As described above, the larger the heat passage coefficient of the utilization units 161 and 162, the greater the capacity required for the compressor 2. Further, it has been found that the standard indicated by the equation (7) increases the capacity required of the compressor 2 as the coefficient n is smaller.
Therefore, as shown in FIG. 3, it is preferable that the normative coefficient n represented by Expression (7) is smaller as the heat passage coefficient of the utilization units 161 and 162 is larger.
That is, the larger the normative coefficient n, the smaller the heat passage coefficient, and the smaller the capacity required for the compressor 2. Therefore, a configuration in which the driving frequency of the compressor 2 decreases as the normative coefficient n increases is preferable.

  A map showing the relationship between the heat passage coefficients of the utilization units 161 and 162 and the normative coefficient n corresponds to a plurality of heat passage coefficients conceivable for the utilization units 161 and 162 (for example, A, B, and C in FIG. 3). Coefficients n (na, nb, and nc indicated by circles) that can optimally adjust the usage unit room temperature of the usage units 161 and 162 are determined by experimental measurement, simulation, or the like, and these points are determined as straight lines (Ln) or curved lines (Cn). Created by tying with.

  The online system identifier 47 shown in FIG. 1 identifies the parameters a and b indicating the characteristics of the utilization units 161 and 162, and further, the heat passage coefficients of the utilization units 161 and 162 based on the identified parameters a and b. Is calculated.

The relationship between the parameters a and b indicating the characteristics of the utilization units 161 and 162 and the heat passage coefficient of the utilization units 161 and 162 is expressed by a characteristic equation. The online system identifier 47 determines whether the parameters a and b are identified. Based on the characteristic formula, the heat passage coefficients of the utilization parts 161 and 162 are calculated.
Further, the on-line system identifier 47 refers to the map shown in FIG. 3 based on the calculated heat passage coefficient, and determines the normative coefficient n shown in Expression (7).

The norm including the coefficient n determined in this way takes into account the influence of the heat passage coefficient of the utilization units 161 and 162, and the feedback gains (K ₁ , K ₂ , K) determined based on this norm. ₃ ) takes into consideration the influence of the heat passage coefficient of the utilization parts 161 and 162.
Therefore, the feedback control of the multi-room air conditioner S by the control arithmetic device 32 (feedback arithmetic unit 44) also takes into account the influence of the heat passage coefficient of the utilization units 161 and 162, and the thermal environment of the utilization units 161 and 162. It is possible to control the multi-room air conditioner S in a suitable manner in response to the change (such as a change in the temperature of the use part room due to outside air).

  And even if it is a case where the thermal environment of the utilization parts 161 and 162 changes largely, as shown in FIG. 4, indoor temperature changes temporally, without overshooting, and it converges on the preset temperature used as target temperature. Thus, even if it is a case where the thermal environment of the utilization parts 161 and 162 changes a lot, the suitable control state of the multi-room air conditioner S is maintained.

FIG. 5 is a flowchart showing a procedure in which the control arithmetic device controls the multi-room air conditioner. With reference to FIG. 5, the procedure in which the control arithmetic unit 32 controls the multi-room air conditioner S will be described (see FIGS. 1 to 3 as appropriate).
When the control arithmetic device 32 starts control of the multi-room air conditioner S, the control arithmetic device 32 acquires the room temperatures of the utilization units 161 and 162 based on the measured values of the utilization unit indoor temperature detectors 261 and 262 (step S1).
Further, the on-line system identifier 47 of the control arithmetic device 32 identifies the parameters a and b of the time series model represented by the equation (1) based on the acquired room temperature (step S2). Further, the online system identifier 47 of the control arithmetic device 32 calculates the heat passage coefficient of the utilization units 161 and 162 based on the identified parameters a and b (step S3), and the normative coefficient n for the calculated heat passage coefficient. Is determined (step S4).

Then, the on-line system identifier 47 of the control arithmetic unit 32 sets the standard (secondary standard) shown in the equation (7) by the determined coefficient n, and obtains the optimal solution that minimizes this standard, thereby obtaining the optimum feedback. Gains (K ₁ , K ₂ , K ₃ ) are determined (step S5).
Further, the feedback arithmetic unit 44 of the control arithmetic unit 32 calculates the output signal vector u ⁰ (k) represented by Expression (9) including the feedback gain obtained by the online system identifier 47, and outputs the output signal vector u. ^The multi-room air conditioner S is controlled based on ⁰ (k). For example, the control arithmetic device 32 drives the compressor 2 at a driving frequency calculated as an element of the output signal vector u ⁰ (k) (step S6).

The control arithmetic unit 32 repeatedly executes Steps S1 to S6, that is, returns the procedure from Step S6 to Step S1, and sequentially calculates the output signal vector u ⁰ (k) including the drive frequency so that the compressor 2 is operated. To drive.

In addition to the drive frequency of the compressor 2 (see FIG. 1), the opening degree of the outdoor electronic expansion valve 8 (see FIG. 1) and the indoor electronic expansion valves 121 and 122 (see FIG. 1), the outdoor fan 4 (see FIG. 1). ) And the rotational speeds of the indoor fans 111 and 112 (see FIG. 1) may be included as elements of the output signal vector u ⁰ (k) shown in Expression (9). In this case, since the outdoor electronic expansion valve 8 and the indoor electronic expansion valves 121 and 122, and the outdoor fan 4 and the indoor fans 111 and 112 are also controlled according to the characteristics of the usage units 161 and 162, the usage units 161 and 162 are used. The room temperature can be suitably adjusted.

As described above, the control arithmetic device 32 (see FIG. 1) for controlling the multi-room air conditioner S of the present embodiment uses the normative coefficient (particularly, the equation ( ⁰ )) for calculating the output signal vector u ⁰ (k). The normative coefficient n) shown in 7) can be determined based on the characteristics (for example, heat passing coefficient) of the utilization units 161 and 162 (see FIG. 1).
Thereby, for example, the driving frequency of the compressor 2 (see FIG. 1) is calculated in consideration of the influence of the heat passage coefficient of the utilization units 161 and 162. Therefore, the control arithmetic device 32 can effectively control the compressor 2 against a large change in the thermal environment of the utilization units 161 and 162, and can suitably adjust the room temperature of the utilization units 161 and 162.

In addition, this invention is not limited to an above-described Example. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.

The multi-room air conditioner S (see FIG. 1) of the present embodiment is based on the norm (formula (7)) including the coefficient n determined according to the heat passage coefficient of the utilization units 161 and 162 (see FIG. 1). Control is performed based on the feedback gain (K ₁ , K ₂ , K ₃ ).
However, the heat capacities of the utilization units 161 and 162 also affect the operation capacity of the compressor 2.
That is, the disturbance with respect to room temperature becomes large, so that a utilization part with a small heat capacity becomes large. For example, when the multi-room air conditioner S is operated for heating, the utilization section having a smaller heat capacity is more easily affected by outside air having a lower temperature, and the utilization section indoor temperature is severely lowered. growing.
Therefore, a configuration may be adopted in which the normative coefficient n shown in Expression (7) is corrected so as to decrease as the heat capacity of the utilization unit decreases.

The norm including the coefficient n determined in this way takes into consideration the influence of the heat capacity of the utilization units 161 and 162, and feedback gains (K ₁ , K ₂ , K ₃ ) determined based on this norm. This takes into consideration the influence of the heat capacity of the utilization units 161 and 162.
Therefore, the control of the multi-room air conditioner S by the control arithmetic device 32 also takes into account the influence of the heat capacity of the utilization units 161 and 162, and changes in the thermal environment of the utilization units 161 and 162 (the utilization unit room temperature due to the outside air). Of the multi-room air conditioner S that more effectively absorbs the change in the

In this embodiment, the multi-room air conditioner S is a first-order lag system, a one-input one-output system, and a system with no dead time, and online identification is a sequential least square method. The control standard is a secondary standard of control accuracy and power consumption.
Without being limited to this configuration, the multi-room air conditioner S may be a high-order delay system, a multi-input multi-output system, a system having a dead time, or may be another identification method or another control standard. Good.

In addition, the present invention is not limited to the above-described embodiments, and appropriate design changes can be made without departing from the spirit of the invention.
For example, the control calculation device 32 (see FIG. 1) of the present embodiment uses the utilization units 161 and 162 (see FIG. 1) that are calculated based on the parameters a and b estimated by the online system identifier 47 (see FIG. 1). 3 and the map shown in FIG. 3 are used to determine the standard coefficient n shown in Equation (7). The coefficient n is determined from a function indicating the relationship between the heat transfer coefficient and the standard coefficient n. It may be a configuration.
Further, the control arithmetic device 32 may be provided with a map or a function indicating the relationship between the parameters a and b and the normative coefficient n.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Compressor 3 Outdoor heat exchanger 4 Outdoor fan 8 Outdoor electronic expansion valve 17 Outdoor temperature detector (detection means)
18 Compressor refrigerant discharge superheat detector (detection means)
19 Compressor refrigerant suction pressure detector (detection means)
20 Compressor refrigerant discharge pressure detector (detection means)
21 Compressor power detector (detection means)
22 Inverter compressor controller (operating means)
23 Outdoor ventilation function controller (operation means)
24 Outdoor fan power detector (detection means)
25 Outdoor electronic expansion valve opening controller (operating means)
44 Feedback calculator 47 Online system identifier 91, 92 Indoor unit 101, 102 Indoor heat exchanger 111, 112 Indoor fan 121, 122 Indoor electronic expansion valve 161, 162 Utilization section (room)
261,262 Usage room temperature detector (detection means)
271 and 272 Use part blowing temperature detector (detection means)
281 and 282 Indoor air blow capacity controller (operating means)
291,292 Indoor fan power detector (detection means)
301,302 Indoor electronic expansion valve opening operation device (operation means)
311 and 312 Setting device (setting means)
S Multi-room air conditioner n Standard coefficient

Claims (3)

An outdoor unit and one or a plurality of indoor units are provided, and the outdoor unit and the indoor unit are connected by piping to form a closed circuit, and a refrigerant is enclosed in the closed circuit,
The outdoor unit includes an outdoor fan that pipes a variable frequency compressor, an outdoor heat exchanger, and an outdoor electronic expansion valve and blows air to the outdoor heat exchanger,
In the indoor unit, an indoor heat exchanger that exchanges heat with indoor air and an indoor electronic expansion valve that adjusts the flow rate of the refrigerant in the indoor heat exchanger are sequentially piped and an indoor fan that blows air to the indoor heat exchanger is provided. In the air conditioner formed and prepared,
A plurality of parameters representing the relationship between the heat capacity of the utilization unit in which the indoor unit is arranged and the heat passage coefficient at least as a factor, the state of the utilization unit thermal environment, and the driving frequency of the compressor and the capacity of the air conditioner Online system identifier, feedback calculator, outdoor temperature, compressor refrigerant discharge superheat, compressor refrigerant suction pressure, compressor refrigerant discharge pressure, compressor consumption Detection means for detecting each control amount including at least electric power, indoor temperature, indoor blowing temperature, driving frequency of the compressor, outdoor fan rotation speed, outdoor electronic expansion valve opening degree, indoor fan rotation speed, indoor electronic expansion valve opening Operating means for operating each operation amount including at least the degree, and setting means for setting a set value including at least the room temperature,
The online system identifier inputs an operation amount signal vector whose element is a signal for each operation amount and a detection signal vector whose element is each detection signal detected by the detection means, and A least-squares online system identifier that identifies and outputs a parameter estimation value signal vector representing the dynamic characteristics of the machine and the utilization unit in the sense of least-squares,
The feedback calculator inputs the parameter estimated value signal vector, the detection signal vector, and a set value signal vector having the set value set by the setting means as an element, and for each input vector A feedback manipulated variable calculator that outputs an output signal vector that maximizes COP,
The air conditioner, wherein the online system identifier determines a normative coefficient for calculating the output signal vector based on the parameter. The online system identifier is
Based on the identified parameters, calculate at least the heat passage coefficient of the utilization part,
The air conditioner according to claim 1, wherein the coefficient of the norm is set to a smaller value as the calculated heat passage coefficient increases.   The air conditioner according to claim 1 or 2, wherein a driving frequency of the compressor calculated as an element of the output signal vector is smaller as the coefficient of the norm is larger.

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