JP2008096079A - Heat pump controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce defects of a heat pump controller and reduce costs by providing a circuit configuration eliminating the need of a circuit for instant power failure detection. <P>SOLUTION: The heat pump controller is provided with a diode bridge 2 rectifying a commercial power source, a capacitor 3 smoothing a voltage rectified by the diode bridge, a voltage detecting means 5 for detecting the voltage smoothed by the capacitor, and a control part 6 input with the voltage detected by the voltage detecting means and determining instant power failure by a value of the voltage. By carrying out detection of instant power failure when the voltage input into the control part 6 by the voltage detecting means 5 becomes a certain value or less during normal operation, the circuit configuration not needing the circuit for instant power failure detection can be provided, defects of the heat pump controller due to defects of single components can be reduced, and costs can be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat pump control device.

  Conventionally, this type of control device, not limited to a heat pump control device, detects a power failure using a power failure detection circuit during an instantaneous power failure of a commercial power source.

FIG. 3 shows a conventional control device described in Patent Document 1. In FIG. As shown in FIG. 3, a commercial power supply 101, a rectifying means 102 for rectifying the commercial power supply 101, a waveform shaping means 103 for shaping the rectified output waveform, and a rise detection means 104 for detecting the rise of the output. The clock time measuring means 107 for measuring time from the rising signal signal, the signal interval detecting means 105 for measuring the rising signal interval, and the instantaneous power failure determining means 106 are constituted by the signal interval.
JP 7-280371 A

  However, the conventional configuration requires a power supply circuit for detecting an instantaneous power failure, which increases circuit components and increases the cost of the heat pump control device.

  The present invention solves the above-mentioned conventional problems, and since a circuit for detecting an instantaneous power failure is not required, a heat pump control apparatus capable of reducing defects in a heat pump control apparatus due to a single component defect and reducing costs. The purpose is to provide.

  In order to solve the conventional problem, the heat pump control device of the present invention rectifies the commercial power supply, detects the rectified voltage at the control unit, and the rectified voltage becomes equal to or lower than a certain voltage. The control device detects an instantaneous power failure.

  Thereby, by setting it as the circuit structure which does not require instantaneous power failure detection, the defect of the heat pump control apparatus by the defect of a component single-piece | unit can be reduced, and cost can be reduced.

  Further, when the heat pump control device of the present invention is a heat pump control device having a current limiting element for preventing inrush current and a switch means, by performing detection means similar to the detection of instantaneous power failure, This is a control device for determining a failure.

  As a result, it is possible to facilitate failure determination of a single component of the switch means and reduce the cost required for component replacement.

  The heat pump control device of the present invention has a circuit configuration that does not require a circuit for detecting an instantaneous power failure, thereby reducing defects in the heat pump control device due to a failure of a single component and reducing costs.

Further, when a heat pump control device having a current limiting element for preventing inrush current and a switch means is used, it is possible to easily determine the failure of a single part of the switch means, and to reduce the cost required for the replacement of the parts.

  According to a first aspect of the present invention, there is provided a diode bridge for rectifying a commercial power supply, a capacitor for smoothing a voltage rectified by the diode bridge, a voltage detection unit for detecting a voltage smoothed by the capacitor, and the voltage detection unit. A controller that inputs the detected voltage and determines an instantaneous power failure based on the value of the voltage, or detects an abnormal signal from each circuit of the heat pump control device, and includes the controller by the voltage detector during normal operation. By detecting an instantaneous power failure when the voltage input to the voltage falls below a certain value, a circuit configuration that does not require a circuit for detecting an instantaneous power failure can be achieved. Defects in the control device can be reduced and costs can be reduced.

  According to a second invention, the heat pump control device according to the first invention is a heat pump control device having a current limiting element for preventing an inrush current and a switch means, and by performing detection means similar to the detection of an instantaneous power failure, the switch means This makes it easy to determine the failure of a single component, and to reduce the cost required for component replacement.

  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 shows a circuit diagram of a heat pump control apparatus according to the first embodiment of the present invention.

  In FIG. 1, a diode bridge 2 for rectifying a commercial power source 1, a capacitor 3 for smoothing the voltage rectified by the diode bridge 2, a load 4 for driving the voltage smoothed by the capacitor 3 as a power source, The voltage detection means 5 for detecting the voltage smoothed by the capacitor 3 and the voltage detected by the voltage detection means 5 are input, and an instantaneous power failure is determined by the value of the voltage, or from each circuit of the heat pump control device It is comprised from the control part 6 which detects this abnormal signal.

  About the heat pump control apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The commercial power source 1 is rectified by the diode bridge 2 and the voltage is smoothed by the capacitor 3. The voltage smoothed by the capacitor 3 is detected by the voltage means 5 and the voltage value is input to the control unit 6. Since the power supply from the commercial power supply 1 is stopped at the moment of power failure, no current is supplied to the capacitor 3, and power is consumed by the load 4, so that the voltage of the capacitor 3 decreases. The voltage value of the capacitor 3 is detected by the voltage detection means 5 and input to the control unit 6. When the voltage value becomes equal to or lower than a certain voltage value, the control unit 6 determines an instantaneous power failure.

  As described above, in the present embodiment, the instantaneous power failure detection means is a heat pump control device that does not require a circuit for instantaneous power failure detection, thereby reducing defects in the heat pump control device due to a single component failure, and Cost can be reduced.

(Embodiment 2)
FIG. 2 is a circuit diagram of a heat pump control apparatus according to the second embodiment of the present invention, and a current limiting element 7 for preventing an inrush current that is a charging current to the capacitor 3 from the circuit diagram of FIG. And a heat pump control device having first and second switch means 8 and 9.

  About the heat pump control apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In Embodiment 1, an inrush current flows as a charging current to the capacitor 3 at the moment when the commercial power supply 1 is supplied. Usually, in order to prevent this, the circuit has the current limiting element 7 and the first and second switch means 8.9. In FIG. 2, first, the first switch means 8 is turned on by the control unit 6, the inrush current is limited by the current limiting element 7, the capacitor 3 is charged, and the capacitor 3 is charged to some extent. The control unit 6 controls the second switch means 9 to turn on. Here, when the first switch means 8 is out of order, the capacitor 3 is not charged.

  However, the control unit 6 outputs a signal for turning on the first switch means 8, and the control unit 6 detects an abnormality that occurs because the capacitor 3 is not charged. Here, when the voltage of the capacitor 3 is detected by the voltage detection means 5, when the control unit 6 outputs an ON signal to the first switch means 8, a single component of the first switch means 8 is used. It is possible to determine whether the switch is operating normally, to facilitate the failure determination of the switch means 8, and to reduce the cost required for component replacement.

  As described above, the heat pump control device according to the present invention does not require a circuit for detecting an instantaneous power failure, and can easily detect a failure of a single component of the switch means. It can also be applied to applications such as necessary electronic control devices and elevators that require relay failure determination.

Circuit diagram of heat pump control apparatus according to Embodiment 1 of the present invention Circuit diagram of heat pump control apparatus in embodiment 2 of the present invention Circuit diagram of conventional heat pump controller

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Diode bridge 3 Capacitor 4 Load 5 Voltage detection means 6 Control part 7 Current limiting element 8 1st switch means 9 2nd switch means 101 Commercial power supply 102 Rectification means 103 Waveform shaping means 104 Rise detection means 105 Signal interval Detection means 106 Instantaneous power failure determination means 107 Clock timing means

Claims (2)

A diode bridge for rectifying commercial power, a capacitor for smoothing the voltage rectified by the diode bridge, a voltage detection means for detecting the voltage smoothed by the capacitor, and a voltage detected by the voltage detection means And a controller that determines an instantaneous power failure based on the voltage value or detects an abnormal signal from each circuit of the heat pump controller, and the voltage input to the controller by the voltage detector during normal operation is A heat pump control device that detects an instantaneous power failure when a predetermined value or less is reached. A diode bridge for rectifying the commercial power supply, a capacitor for smoothing the voltage rectified by the diode bridge, a current limiting element for preventing an inrush current flowing when charging the capacitor, and put in series with the commercial power supply line The switch means, the voltage detection means for detecting the voltage smoothed by the capacitor, the voltage detected by the voltage detection means is input, and the instantaneous power failure is determined by the value of the voltage, or each of the heat pump control devices A control unit for detecting an abnormal signal from the circuit, and detecting the voltage of the capacitor by the voltage detection unit, so that the switch unit is normally turned on when the control unit outputs an ON signal to the switch unit; It is possible to determine whether or not the heat pump is controlled.

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