JP2000193291A - Method for controlling operation of air conditioner and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling operation of air conditioner by which the accurate actuation or efficient operation of a compressor can be secured by reducing the influence of the voltage fluctuation of commercial power supply on the output voltage to the compressor and to provide an air conditioner. SOLUTION: An air conditioner is operated in such a way that the duty of commercial power supply 12 is controlled and impressed upon the power source circuit of the compressor 11 after the duty is converted into a power supply signal set in accordance with the voltage value of the power supply 12. In this case, a voltage correcting circuit 13 which decides the optimum output voltage to the compressor 11 through correction by distributing the duty data which decide the output voltage to the compressor 11 to a duty table for high-voltage domain, rated-voltage domain, or-low voltage domain based on the input voltage is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control method of an air conditioner for performing indoor air conditioning and an air conditioner.

[0002]

2. Description of the Related Art As shown in FIG. 5, an electric circuit of a conventional separation type air conditioner capable of cooling and heating operation includes an indoor unit 1, an outdoor unit 2, and an internal / external connection wire 3 for electrically connecting them. It is composed of The indoor unit 1 includes a main body switch 4, an indoor electronic control unit 5, an indoor fan motor 6 such as a transistor motor, and a louver motor 7 for driving upper and lower blades of the indoor unit. In addition, outdoor unit 2
Is composed of an outdoor electronic control device 8, a four-way valve 9 for switching a refrigerant path according to a refrigeration cycle and a heating cycle, an outdoor fan motor 10 such as an induction motor, and a compressor 11 for compressing the refrigerant. ing.

The operation of this separation type air conditioner will be described below.

The indoor unit 1 is connected to a commercial power supply 12, and when the main body switch 4 of the indoor unit 1 is turned on, electric power is supplied to the indoor side electronic control unit 5 to start a control operation.
By rotating the indoor fan motor 6 and the louver motor 7,
Start circulation of room air through an indoor heat exchanger (not shown). Here, when the user inputs an instruction to start operation,
The indoor electronic control unit 5 controls a main relay (not shown) to be in a connected state, and supplies a commercial power supply 12 to the outdoor unit 2. At this time, electric power from the commercial power supply 12 is supplied to the outdoor electronic control device 8, and the outdoor electronic control device 8 starts a control operation, applies an instruction voltage to the compressor 11 to start rotation, and The commercial power supply 12 is also connected to the outdoor fan motor 10, and as a result, the supply of outside air to the outdoor heat exchanger (not shown) is started. The four-way valve 9 that switches the flow path of the refrigerant is at a position where the refrigerant flows to the path of the cooling cycle when the commercial power supply 12 is not connected, according to an instruction from the outdoor electronic control device 8. In this state, the air conditioner starts the cooling operation.

Next, when the user designates and inputs a heating operation, the outdoor electronic control unit 8 controls the four-way valve 9 to connect to the commercial power supply 12.
Connect. With this operation, the refrigerant path is switched to the heating cycle side, and the heating operation starts. At this time, the outdoor air is sent into the outdoor heat exchanger by the outdoor fan motor 10, and the heat of the outdoor air is taken into the refrigerant by the outdoor heat exchanger, so that the refrigerant evaporates and vaporizes, and the refrigerant is compressed by the compressor 11. And sent to the indoor heat exchanger.

In any case, an instruction voltage obtained by amplifying or reducing the commercial power supply 12 based on a ratio corresponding to the operating frequency of the compressor 11 is applied to the compressor 11 by the outdoor electronic control unit 8.

[0007]

However, in the configuration of the conventional air conditioner, when the voltage of the commercial power supply fluctuates, the output voltage to the compressor fluctuates. As a result, the torque of the compressor fluctuates. Boot failure may occur. In order to eliminate this, it is necessary to set the output signal to the compressor to be relatively large. However, there are cases where the vibration during the start-up or operation of the outdoor unit increases. Therefore, as measures to be taken at present, vibration damping components such as coal tape are frequently used in the piping of the outdoor unit, or the piping is provided with a loop structure for damping vibration. As a result, there is a problem that a material cost is increased, man-hours for assembling are increased, and workability is deteriorated.

[0008] Further, there is a problem that the operating point of the compressor is shifted, so that the efficiency of the compressor is deteriorated and the power consumption is increased.

It is an object of the present invention to provide an air conditioner operation control method and an air conditioner that reduce the influence on the output voltage to the compressor due to fluctuations in the voltage of the commercial power supply and ensure accurate compressor operation. It is the purpose.

[0010]

According to the method for controlling the operation of an air conditioner of the present invention, the duty of a commercial power supply is controlled in a power supply circuit of a compressor, and the duty is set according to the voltage value of the commercial power supply. It is operated by converting it to a power signal and applying it.

According to the present invention, the output voltage to the compressor can be optimized irrespective of the voltage fluctuation of the commercial power supply, and accurate start-up of the compressor and efficient operation can be ensured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, when operating a compressor interposed in a refrigeration cycle, a commercial power supply is duty-controlled by a power supply circuit of the compressor, and This is a start-up control method for an air conditioner that operates by converting the duty into a power signal set according to the voltage value of the commercial power supply and applying the output to the compressor, irrespective of the voltage fluctuation of the commercial power supply. Voltage can be optimized, accurate compressor start-up can be secured, outdoor unit vibration can be reduced, material cost of vibration damping parts can be reduced, and work efficiency during assembly work can be improved be able to. Further, the compressor can always be operated efficiently.

According to a second aspect of the present invention, the duty of the commercial power is controlled, and the duty is converted into a power signal set according to the voltage value of the commercial power and applied to the power circuit of the compressor. An air conditioner that operates in accordance with an input voltage and determines duty data for determining an output voltage to the compressor for a high voltage range, a rated voltage range,
The air conditioner is provided with a voltage correction control unit that distributes the voltage to one of the low voltage range tables and corrects and determines the optimum output voltage to the compressor. The output voltage to the unit can be optimized, the compressor can be started correctly, the vibration of the outdoor unit can be reduced, the material cost of vibration damping parts can be reduced, and assembly work can be performed. Work efficiency at the time can be improved. Further, the compressor can always be operated efficiently.

According to a third aspect of the present invention, a load state detecting means for detecting a load state is provided, and a voltage correction control unit changes duty data based on the load state to optimize the compressor. 3. The air conditioner according to claim 2, wherein the air conditioner is configured to correct and determine an output voltage. The load condition of the air conditioner can be detected, and the influence of the output voltage on the compressor due to the load condition can be detected. Consideration can be given to optimize the output voltage to the compressor.

According to a fourth aspect of the present invention, there is provided a voltage / current detecting means for detecting an output voltage and an output current to the compressor, and a voltage correction control section is provided for detecting the output voltage detected by the voltage / current detecting means. The air conditioner according to claim 2, wherein the duty data is changed based on the voltage and the output current, and the optimum output voltage to the compressor is corrected and determined. Can be clarified,
The output voltage to the compressor can be optimized in consideration of the influence of the load on the output voltage to the compressor.

Hereinafter, an air conditioner operation control method and an air conditioner of the present invention will be described based on specific embodiments.

(Embodiment 1) Embodiment 1 shown in FIG.
Is a separation type air conditioner composed of an outdoor unit 1, an indoor unit 2, and an inside / outside connection wire 3 for connecting them, as in the conventional example shown in FIG. Only in that a voltage correction circuit 13 is added.

The voltage correction circuit 13 controls the duty of the commercial power supply 12 and adjusts the duty to the commercial power supply 1.
2 is applied to the power supply circuit of the compressor 11 after being converted into a power supply signal set in accordance with the voltage value of FIG.
As shown in (1), duty data for determining the output voltage to the compressor 11 is distributed to one of the duty tables for the high voltage range, the rated voltage range, and the low voltage range based on the input voltage, and is distributed to the compressor 11. And an arithmetic circuit 15 for correcting and determining the optimum output voltage.

Here, the operation of the separation type air conditioner will be described below.

As shown in FIG. 1, the main unit switch 4 of the indoor unit 1 is turned on, and the commercial power supply 12 is supplied to the indoor electronic control unit 5.
In the state where the power is supplied from and the control operation is started,
When the user inputs an instruction to start the operation, the electric power from the commercial power supply 12 is supplied to the outdoor electronic control device 8 via the indoor electronic control device 5 and supplied to the voltage correction circuit 13.

As shown in FIG. 2, the voltage detecting means 14
The input voltage from the commercial power supply 12 supplied to the outdoor electronic control device 8 is detected. That is, voltage fluctuation of the commercial power supply 12 is detected. The voltage detecting means 14 outputs the detected input voltage to the arithmetic circuit 15 as an input voltage signal.

The arithmetic circuit 15 converts the duty data based on the input voltage signal into the duty table so that the output voltage to the compressor 11 becomes an optimum output voltage corresponding to each operating frequency when the rated voltage is applied. Then, the optimum output voltage whose output voltage is corrected according to the result is applied to the compressor 11.

More specifically, based on the input voltage input from the commercial power supply 12, the duty data for determining the occupancy of the output voltage to the compressor 11 is reduced, and the average value of the output voltage is reduced by reducing the duty. For high voltage range,
The average value of the output voltage to the compressor 11 is allocated to one of three duty tables for the rated voltage range using the standard duty and for the low voltage range in which the average value of the output voltage is increased by increasing the duty. Is corrected to determine the optimum output voltage.

When the duty data is allocated to the duty table for the high voltage range, correction for reducing the duty and reducing the average value of the output voltage is executed to determine the optimum output voltage. When the duty data is distributed to the low-voltage range duty table, a correction for increasing the duty and increasing the average value of the output voltage is executed to determine the optimum output voltage. When the duty data is distributed to the duty table for the rated voltage range, the duty is the standard duty, so that it is not necessary to correct the average value of the output voltage, and this output voltage is determined as the optimum output voltage.

It is to be noted that, in the separation type air conditioner, the optimal output voltage corrected and determined by the voltage correction circuit 13 in the same manner as described above by the voltage correction circuit 13 not only at the time of startup as described above, but also during operation such as cooling and heating. The compressor 11 is always operated by being applied.

With this configuration, it is possible to optimize the output voltage to the compressor 11 irrespective of voltage fluctuations of the commercial power supply 12, to ensure accurate start-up of the compressor 11, as in the conventional case. It is unnecessary to set the output voltage to the compressor 11 to be high in the outdoor unit 2.
Vibration can be reduced, the vibration damping parts used for vibration damping can be eliminated, and the material cost can be reduced. Can be made unnecessary, and the work efficiency during the assembly work can be improved.

Further, the compressor 11 can always operate efficiently regardless of the voltage fluctuation of the commercial power supply 12.

(Embodiment 2) As shown in FIG. 3, an air conditioner according to Embodiment 2 of the present invention is constructed by adding a load of the separate type air conditioner to the aforementioned separate type air conditioner of Embodiment 1. An indoor temperature detecting means 16 and an outside air temperature detecting means 17 as load state detecting means for detecting a state are provided, and as shown in FIG. The difference is that the data is changed and the optimum output voltage to the compressor 11 is corrected and determined.

The voltage correction control unit 13 includes a voltage detection unit 14
And an arithmetic circuit 15a. Arithmetic circuit 15a
Has a shift amount data table in which shift amounts for shifting the duty data in accordance with the magnitude of the use load are tabulated.

Here, the operation of the separation type air conditioner will be described below.

The arithmetic circuit 15a includes, as shown in FIG.
An indoor unit heat exchange temperature detection signal S1 detected by an indoor unit pipe temperature sensor as the indoor temperature detection means 16 and an outdoor unit heat exchange temperature detection signal S2 detected by an outdoor unit pipe temperature sensor as the outdoor temperature detection means 17 Is input.

The arithmetic circuit 15a calculates the use load from the indoor unit heat exchange temperature detection signal S1 and the outdoor unit heat exchange temperature detection signal S2, and calculates the shift amount of duty data corresponding to the calculated use load. When the output voltage to the compressor 11 is determined by searching from the shift amount data table, the shift amount is added to the duty data as a correction for the load used, and the output voltage is further optimized and the output voltage is determined. Is determined.

With such a configuration, in addition to the effects of the first embodiment, the load condition of the air conditioner can be detected, and the effect of the output voltage on the compressor 11 due to the load condition is considered. As a result, the output voltage to the compressor 11 can be further optimized, so that efficient operation can be performed in a load state.

In the second embodiment, the voltage correction control unit 13 corrects and determines the optimum output voltage to the compressor 11 by changing the duty data based on the load condition of the air conditioner detected by the load condition detecting means. Is provided, a voltage / current detection unit for detecting an output voltage and an output current to the compressor 11 is provided, and the voltage correction control unit 13 is configured to detect the output voltage and the output current detected by the voltage / current detection unit. Even if it is configured to correct and determine the optimal output voltage to the compressor 11 by changing the duty data based on the duty data, the load condition of the air conditioner can be detected, and the compressor 11 based on the load condition can be detected. Considering the effect of output voltage on
The output voltage to 1 can be optimized.

In each of the above embodiments, the voltage detecting means 1
Although the output voltage from the outdoor electronic control device 8 is detected at 4, the same effect can be obtained without any problem even when the output voltage to the compressor 11 is detected by the voltage detection means 14.

[0036]

As described above, according to the first aspect of the present invention, the duty of the commercial power is controlled in the power circuit of the compressor, and the duty is set according to the voltage value of the commercial power. By converting the power signal into a power signal and applying it to the operation, the output voltage to the compressor can be optimized irrespective of the voltage fluctuation of the commercial power supply, and the correct start of the compressor can be secured. Thus, the vibration of the outdoor unit can be reduced, the material cost of the vibration damping component can be reduced, and the working efficiency at the time of the assembly work can be improved.

Furthermore, efficient operation can always be performed irrespective of fluctuations in the voltage of the commercial power supply.

According to the second aspect of the present invention, the duty data for determining the output voltage to the compressor is determined based on the input voltage for the high voltage range, the rated voltage range, and the low voltage range. Optimizing the output voltage to the compressor irrespective of the voltage fluctuation of the commercial power supply by providing a voltage correction control unit that corrects and determines the optimum output voltage to the compressor It is possible to ensure accurate start-up of the compressor, reduce the vibration of the outdoor unit, reduce the material cost of the vibration damping parts, and improve the work efficiency at the time of assembly work. .

Furthermore, efficient operation can always be performed irrespective of fluctuations in the voltage of the commercial power supply.

According to the third aspect of the present invention, a load state detecting means for detecting a load state is provided, and the voltage correction control unit changes the duty data based on the load state and compresses the data. By configuring to correct and determine the optimal output voltage to the compressor, it is possible to detect the load state of the separation-type air conditioner, consider the effect of the output voltage on the compressor due to the load, Output voltage can be optimized.

According to the fourth aspect of the present invention, there is provided a voltage / current detecting means for detecting an output voltage and an output current to the compressor, and the voltage correction control section is provided with the voltage / current detecting means. By changing the duty data based on the output voltage and the output current detected in the above, and configured to correct and determine the optimal output voltage to the compressor, it is possible to detect the load state of the air conditioner, The output voltage to the compressor can be optimized in consideration of the effect of the load on the output voltage to the compressor.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric circuit of a separation-type air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of a voltage correction circuit according to the first embodiment;

FIG. 3 is a block diagram showing an electric circuit of the separation-type air conditioner according to Embodiment 2 of the present invention.

FIG. 4 is a block diagram showing a configuration of a voltage correction circuit according to the second embodiment;

FIG. 5 is a block diagram showing an electric circuit of a conventional separation type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 Voltage correction circuit 14 Voltage detection means 15 Operation circuit 15a Operation circuit 16 Room temperature detection means 17 Outside air temperature detection means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Daisuke Tabata 1006 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3L060 AA01 AA03 CC10 CC19 DD08 EE02

Claims (4)

[Claims] When operating a compressor interposed in a refrigeration cycle, a power supply circuit of the compressor is controlled in duty by a commercial power supply, and the duty is set according to a voltage value of the commercial power supply. An operation control method for an air conditioner that operates by converting a signal to apply the signal. 2. An air conditioner in which the duty of a commercial power supply is controlled and the duty is converted into a power signal set according to the voltage value of the commercial power and applied to a power circuit of a compressor for operation. The duty data for determining the output voltage to the compressor is allocated to one of tables for a high voltage range, a rated voltage range, and a low voltage range based on the input voltage, and an optimum output voltage to the compressor is determined. An air conditioner provided with a voltage correction control unit for correcting and determining. 3. A load state detecting means for detecting a load state, wherein the voltage correction control section changes duty data based on the load state and corrects and determines an optimum output voltage to the compressor. The air conditioner according to claim 2. 4. A voltage / current detecting means for detecting an output voltage and an output current to a compressor, wherein a voltage correction control unit controls a duty data based on the output voltage and the output current detected by the voltage / current detecting means. 3. The air conditioner according to claim 2, wherein the air conditioner is modified so as to correct and determine an optimum output voltage to the compressor.