JP3965791B2 - Fan motor for refrigeration equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fan motor that forcibly circulates cool air in a freezer, a refrigerator, or the like, and more particularly to a power-saving DC fan motor.
[0002]
[Prior art]
Generally, refrigeration equipment such as a refrigerator is the largest power consuming equipment in the home, and therefore, power saving is demanded. In the above refrigeration equipment, the compressor consumes the most power, but the power consumption of the fan motor that forcibly circulates the cool air in the refrigerator is insignificant, and it is important to reduce the power consumption of the fan motor. Yes.
[0003]
By the way, as shown in FIG. 4, a general drive circuit of a refrigeration equipment includes a compressor 1 and AC fan motors 2 and 3 such as a coiled coil type, and supplies a commercial AC power supply 4. However, the AC fan motors 2 and 3 have the advantages that they can be directly driven by an AC power source, the number of parts is small, and the cost is low. However, the power consumption is large, which is not preferable from the viewpoint of power saving. .
[0004]
For this reason, as shown in FIG. 5, DC fan motors 5 and 6 made of brushless motors are provided, and an AC-DC conversion power supply unit that performs AC-DC conversion in order to drive the DC fan motors 5 and 6. 7 and 8 have been developed outside the motor.
[0005]
[Problems to be solved by the invention]
Although the one using the DC fan motors 5 and 6 shown in FIG. 5 consumes less power than the AC fan motor, the AC-DC conversion power supply units 7 and 8 are required. Providing lead wires or the like for connecting the power supply unit increases the number of components, complicates the structure, increases the size of the apparatus, and increases the cost. Further , when the motor drive power is obtained in the AC-DC conversion power supply units 7 and 8, the pressure is reduced through a resistor, and power loss occurs here, which is not preferable from the viewpoint of power saving.
[0006]
The invention noted conventional problems, and relates to a DC motor, low power consumption, yet an object to provide a fan motor for refrigeration equipment that can comprise the entire motor unit compact.
[0007]
[Means for Solving the Problems]
To achieve the above Symbol object, the present invention includes a rectifying unit for rectifying the AC power of the commercial on a single printed circuit board, and the driving coil of the DC motor, a control unit for controlling the driving coil of the DC motor, A high-voltage DC power source rectified by the rectifier unit is directly supplied to the motor drive coil, while a DC low-voltage control power source is reduced by a capacitor and a voltage dividing circuit and supplied to the control unit. The fan motor for refrigeration equipment.
[0008]
According to the present invention, Ri Oh a small DC motor power consumption can further the power consumption of the DC motor is reduced, yet realizing the fan motor refrigeration equipment can be configured the entire motor unit compact.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, Ri Oh a DC motor, comprising: a rectifying unit for rectifying the AC power, a motor driving coil, a control unit for controlling the motor driving coil, it is rectified by the rectification section A high-voltage DC power supply is directly supplied to the drive coil as a drive power supply. On the other hand, a DC low-voltage control power supply supplied to the control unit includes a capacitor (16) connected to the AC power supply and the capacitor (16). And a Zener diode connected to the other side of the voltage dividing circuit, and control of the DC low voltage from a connection point between the voltage dividing circuit and the Zener diode. This is a fan motor for refrigeration equipment in which power is supplied to the control unit, and since high-voltage DC power is directly supplied to the motor drive coil, there is no power loss of this drive power system, while the control unit At low voltage, and has the effect that since a small power consumption, the power consumption of the control power supply system is greatly no effect, thus can be extremely low refrigeration equipment fan motor power consumption as a whole.
[0010]
The invention according to claim 2 of the present invention is the refrigeration fan motor apparatus according to claim 1, the rectifier is obtained by constituting the rectifier circuit by a plurality of diodes, a high driving power of the driving coil such an action as possible out easily be obtained by integer Nagarekai path.
[0011]
The invention according to claim 3 of the present invention is the fan motor for refrigeration equipment according to claim 1, wherein the control unit detects a magnetic pole of the motor, a comparator that outputs a signal of the magnetic pole detection element, The driving element for inverting the comparator output and the driving element for controlling the driving coil controlled by the comparator output and the driving element output are operated, and the driving element for controlling the driving coil is operated. It has the effect of being able to.
[0012]
According to a fourth aspect of the present invention, in the fan motor for a refrigeration apparatus according to any one of the first to third aspects, the rectifying unit and the control unit are mounted with a motor member such as a stator and a motor drive coil. The circuit is formed on a single printed circuit board, and the rectifying unit and the control unit are integrated with the motor and are not externally attached, so that the entire motor can be configured compactly.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is an electrical circuit diagram of a refrigerator using the refrigeration equipment fan motor according to Embodiment 1 of the present invention, FIG. 2 is a schematic circuit diagram of the refrigeration equipment fan motor, and FIG. 3 is the refrigeration equipment fan. It is a circuit diagram of a motor. Note that the same components as the conventional art that put the drawings, the same reference numerals.
[0014]
In the electric circuit diagram of the refrigerator in FIG. 1, 1 is a compressor, 4 is a commercial AC power supply, and 9 and 10 are DC fan motors with a rectifier.
[0015]
DC fan motor 9,10 with rectification section is configured as shown in the schematic circuit diagram of the fan motor 2. That is, the rectifying unit 11 and the control unit 12 are integrally incorporated in the motor, and the high voltage DC power obtained by rectifying the AC power supply 4 by the rectifying unit 11 is directly supplied to the motor driving coils 13 and 14. ing. Also, so as to supply low-voltage DC power obtained by applying reduced commercial A C power source 4 to the control unit.
[0016]
FIG. 3 shows a detailed circuit configuration of the DC fan motor with a rectifying unit. As shown, the rectifier unit 11 is a (rectified to DC about 140v in the present embodiment) rectifier circuit composed of a plurality of diodes 15, and smoother to smooth capacitor (unsigned), DC high voltage power supply Is directly supplied to the motor drive coils 13 and 14. The control unit 12 includes a Hall element 17 that detects the magnetic pole of the motor, a comparator 18 that is provided in the subsequent stage and compares and outputs the output of the Hall element 17, and a resistor that is provided in the subsequent stage and inverts the output of the comparator 18. Drive element 19 and control drive element 20 inserted into the energization circuit of motor drive coils 13 and 14 and applied with the output of comparator 18 to the control pole, and the output of drive element 19 to the control pole It is comprised by the drive element 21 for control.
[0017]
The controller 12 is depressurized by the capacitor 16 and the voltage dividing circuit 22 and supplied as a DC low-voltage power source.
[0018]
In the figure, 23 is a varistor, and 24 is a Zener diode. Although not shown, the motor drive coils 13 and 14 are attached to the printed circuit board together with the stator, and the rectifying unit 11 and the control unit 12 are formed on the printed circuit board, and the motor unit, the rectifying unit 11 and the control unit are formed. The part 12 is integrally formed.
[0019]
In the above configuration, DC high-voltage power is supplied to the motor drive coils 13 and 14, the motor drive coils 13 and 14 are controlled by the control unit 12, and the DC fan motor is driven to rotate as required.
[0020]
Although the DC fan motor originally consumes less power than the AC fan motor, power loss is not caused by supplying the motor drive coils 13 and 14 DC high-voltage power directly from the rectifying unit 11 as in the present embodiment. Thus, a DC fan motor with lower power consumption can be obtained. Although DC power is supplied to the control unit 12, the power to the control unit 12 is DC low voltage and the power consumption of the driving element is small. Therefore, the power consumption of the entire DC fan motor is reduced. The impact on is very small.
[0021]
For this reason, the DC fan motor of the present embodiment has extremely low power consumption, and can be reduced to about 1/4 of the conventional AC fan motor. In addition, the circuit configuration is simple, reliable control operation can be performed, and the rectification unit and the control unit are formed on a single printed circuit board on which motor members such as a stator and a motor drive coil are mounted. Thus, the rectifying unit and the control unit are integrated with the motor and are not externally attached, and the entire motor can be configured compactly.
[0022]
【The invention's effect】
As is clear from the above description, the present invention directly supplies a high-voltage DC power source obtained by rectifying an AC power source by a rectifying unit as a driving power source to the driving coil, while reducing the AC power source by reducing the DC power. Since the voltage control power supply is supplied to the control unit, there is no power loss in the drive power supply system , and the control unit has low voltage and low power consumption. Therefore, it is possible to provide a DC fan motor for refrigeration equipment that consumes very little power as a whole.
[0023]
Further, since the present invention to constitute a rectifier circuit rectifying portion by a plurality of diodes, as possible out to obtain easily a high voltage driving power to the driving coil.
[0024]
Further , according to the present invention, the control unit includes a magnetic pole detection element that detects a motor magnetic pole, a comparator that outputs a signal of the magnetic pole detection element, a drive element that inverts the comparator output, and a comparator output and a drive element output. Since the drive element for controlling the drive coil is controlled, the drive element for controlling the drive coil can be operated reliably.
[0025]
Further , according to the present invention, since the rectifying unit and the control unit are formed on a single printed circuit board to which a motor member such as a stator and a motor driving coil is attached, the rectifying unit and the control unit are integrated with the motor. Thus, the entire motor can be configured compactly without being externally attached.
[Brief description of the drawings]
FIG. 1 is an electric circuit diagram of a refrigerator that uses the fan motor for refrigeration equipment according to Embodiment 1 of the present invention. FIG. 2 is a schematic circuit diagram of the fan motor for refrigeration equipment. Circuit diagram [Fig. 4] Electric circuit diagram of refrigerator using conventional fan motor for refrigeration equipment [Fig. 5] Electric circuit diagram of refrigerator using conventional fan motor for refrigeration equipment [Explanation of symbols]
1 Compressor 4 commercial AC power 9 rectifier with DC fan motor 10 commutation unit with DC fan motor 11 commutation unit 12 control unit 13 a motor driving coil 14 motor drive coil 15 diode 16 capacitor <br/> 17 Hall element 18 comparator 19 drives Element 20 Control drive element 21 Control drive element 22 Voltage dividing circuit 23 Varistor 24 Zener diode

Claims (4)

Oite to the fan motor refrigeration equipment, a rectifier unit for rectifying the AC power, a motor driving coil, wherein a control unit for controlling the motor driving coils, high voltage DC power supply driving power obtained by rectification by the rectifier as a directly supplied construction to the motor driving coils, whereas, control power of the DC low voltage supply to the control unit, and a capacitor connected to the AC power supply, a voltage dividing circuit which is connected to the capacitor, wherein A Zener diode connected to the other side of the voltage dividing circuit, and the DC low voltage control power supply is supplied to the control unit from a connection point between the voltage dividing circuit and the Zener diode. A fan motor for refrigeration equipment. Rectifier unit, refrigeration equipment fan motor according to claim 1, wherein the configuring the rectifier circuit by a plurality of diodes.   The control unit includes a magnetic pole detection element that detects a motor magnetic pole, a comparator that outputs a signal of the magnetic pole detection element, a drive element that inverts the comparator output, and a drive coil that is controlled by the comparator output and the drive element output, respectively. 2. The fan motor for refrigeration equipment according to claim 1, comprising a drive element for control.   4. The refrigeration equipment fan according to claim 1, wherein the rectifying unit and the control unit are formed as a circuit on a single printed circuit board to which a motor member such as a stator and a motor drive coil is attached. motor.

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