JP2010236417A - Compressor control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a compressor cannot be controlled at further optimal timing advance under a load condition of the compressor because the timing advance is decided regardless of load fluctuations of the compressor, in a conventional compressor control device storing the timing advance decided about each rotational frequency of the compressor in a compressor timing advance deciding means to control the compressor. <P>SOLUTION: The timing advance is decided on the basis of the ambient temperature of the compressor detected by an ambient temperature detecting means 3 and rotational frequency detected by a compressor rotational frequency detecting means 5, thereby enabling compressor control at an optimal timing advance according to the improper condition of the compressor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a compressor control device.

Conventionally, as shown in FIG. 3, only the advance angle determined for each rotation speed of the compressor is stored in the compressor advance angle determining means to control the compressor (see, for example, Patent Document 1).
JP 2006-204050 A

  However, in the conventional compressor control apparatus, since the advance angle determined for each rotation speed of the compressor is stored in the compressor advance angle determining means and the compressor is controlled, the load fluctuation of the compressor is caused. Since the advance angle is determined irrespectively, there has been a problem that if the advance angle is set small in order to control the compressor with high efficiency, the step-out tolerance of the compressor decreases when the load is large.

  In addition, if the advance angle is set large in order to increase the step-out tolerance, the efficiency of the compressor deteriorates when the load is small.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to enable compressor control with an optimal advance angle under a load condition depending on the ambient temperature of the compressor.

  In order to solve the above-described conventional problems, the compressor control device according to the present invention has the compressor ambient temperature detected by the ambient temperature detection means for detecting the ambient temperature of the compressor and the rotation speed detected by the compressor rotation speed detection means. Based on this, the advance angle is determined.

  Thus, the advance angle is determined based on the ambient temperature of the compressor detected by the ambient temperature detecting means when the load condition of the compressor fluctuates and the rotational speed detected by the compressor rotational speed detecting means, and the compressor The compressor can be controlled with an optimum advance angle under the load conditions of

  The compressor control device according to the present invention adjusts the advance angle based on the ambient temperature of the compressor detected by the ambient temperature detecting means when the load on the compressor fluctuates and the rotational speed detected by the compressor rotational speed detecting means. Since the compressor can be controlled with the optimum advance angle, even if the load fluctuates, the compressor can be controlled with high efficiency without stepping out.

  1st invention is a compressor control apparatus which drives the compressor which uses an electric motor as a drive source, Comprising: The ambient temperature detection means which detects the ambient temperature of the said compressor, The inverter drive means which drives the said compressor, A diode bridge that rectifies the power supply voltage and supplies a voltage supplied to the inverter driving means, a compressor rotational speed detecting means that detects the rotational speed of the compressor, and a compression that determines the advance angle of the compressor A machine advance angle determining means; and a compressor control means for controlling the compressor at an advance angle determined by the compressor advance angle determining means, the ambient temperature of the compressor detected by the ambient temperature detecting means and the compression By determining the advance angle based on the rotation speed detected by the machine rotation speed detection means, it is possible to control the compressor with the optimum advance angle under the load condition of the compressor, and for each rotation speed of the compressor, Ideal for load conditions and high efficiency It is possible to control the compressor.

  The second invention is the first invention in particular, in which the upper limit advance angle and the lower limit advance angle are stored in the compressor advance angle determining means for each predetermined number of revolutions of the compressor, thereby determining the advance angle determination range. This can be limited, and a finer advance angle can be set.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a diagram showing a compressor control device configured according to an embodiment of the present invention. The operation and action of the compressor control device configured as shown in the figure will be described below.

  Inverter driving means 2 for driving the compressor 1, ambient temperature detecting means 3 for detecting the ambient temperature of the compressor 1, and a diode for rectifying the power supply voltage 8 and supplying the voltage supplied to the inverter driving means 2 A bridge 4; compressor speed detecting means 5 for detecting the speed of the compressor 1; compressor advance determining means 6 for determining the advance angle of the compressor 1; and compressor advance angle determining means 6; A compressor control device comprising a compressor control means 7 for controlling the compressor 1 with the advance angle determined in (1).

  In the present invention, as shown in FIG. 2, the ambient temperature detecting means 3 detects the ambient temperature of the compressor, and the advance angle is determined based on the rotational speed detected by the compressor rotational speed detecting means 5. it can. Since the load condition of the compressor is light when the compressor ambient temperature detected by the ambient temperature detection means 3 is low, the advance angle can be set small and the compressor 1 can be controlled with high efficiency. When the ambient temperature of the compressor detected by the ambient temperature detection means 3 is high, the load condition is heavy, so that the advance angle can be set large to increase the step-out tolerance of the compressor 1.

  As a result, the compressor can be controlled with an optimum advance angle under the load condition of the compressor.

(Embodiment 2)
In the present embodiment, the compressor control apparatus is characterized in that an upper limit advance angle and a lower limit advance angle are stored in the compressor advance angle determining means 6 for each predetermined number of revolutions of the compressor 1.

  Thus, by limiting the advance angle determination range, the advance angle can be adjusted within the upper and lower limits by the load within the same number of revolutions, so that a more advanced advance angle can be set.

  As described above, the control device according to the present invention can control the compressor with the optimum advance angle even when the load condition fluctuates. Therefore, highly efficient compressor drive control more suitable for the load condition. It can be applied to a control device that

The block diagram which shows the compressor control apparatus comprised by embodiment of this invention Characteristic diagram in which upper limit advance angle and lower limit advance angle of the present invention are set for each rotation speed Configuration diagram showing a conventional compressor control device

DESCRIPTION OF SYMBOLS 1 Compressor 2 Inverter drive means 3 Ambient temperature detection means 4 Diode bridge 5 Compressor rotation speed detection means 6 Compressor advance angle determination means 7 Compressor control means 8 Power supply

Claims (2)

A compressor control device for driving a compressor using an electric motor as a driving source, the ambient temperature detecting means for detecting the ambient temperature of the compressor, the inverter driving means for driving the compressor, and the power supply voltage is rectified. A diode bridge for supplying a voltage supplied to the inverter driving means, a compressor rotational speed detecting means for detecting the rotational speed of the compressor, and a compressor advance angle determining means for determining the advance angle of the compressor; A compressor control means for controlling the compressor at an advance angle determined by the compressor advance angle determination means, and detected by the compressor ambient temperature detected by the ambient temperature detection means and the compressor rotation speed detection means. A compressor control device characterized in that an advance angle is determined based on the number of rotations. 2. The compressor control device according to claim 1, wherein an upper limit advance angle and a lower limit advance angle are stored in the compressor advance angle determining means for each predetermined rotation speed of the compressor.

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