JPS59123464A - Power source circuit device for air conditioner - Google Patents

Abstract

PURPOSE:To reduce the size of a power source circuit by commonly using the primary side rectifier of a control circuit DC power source circuit and the primary side rectifier of a motor drive switching power source circuit and commonly using high frequency transformers by a multistage output high frequency transformer. CONSTITUTION:The primary coil 30a of a multistage output high frequency transformer 30 is connected through a primary side rectifier having a diode bridge 9 and a smoothing condenser 10, a transistor 11, a damper diode 12 and a resonance capacitor 13 to an AC power source 1. A voltage controller 40 for a control circuit generates DC voltages V1, V2 by controlling ON or OFF output contacts 40a, 40b connected to the secondary coils 30b, 30c of the transformer 30. A motor controller 18 controls ON or OFF the output contact 18a in response to the command of a rotating speed setter 19 and generates the prescribed DC voltage for driving a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a direct I&
The present invention relates to a power supply circuit device for an air conditioner that supplies Mi, pressure, and a predetermined direct current "Ichikawa (-)" for driving a fan motor.

[Technical background of the invention]

Conventionally, as this type of power supply circuit device, there is one shown in FIG. 111. In Fig. 1, I is a 45114 father-flow fermentation source, and this power supply has a control side j circuit nJ DC', 4j5 source circuit 2 and a 1-layer B Vh switching q (external circuit) for the motor 1. 3 is grounded.The power supply circuit 2
y A rectifier circuit consisting of a transformer 4, a diode bridge 5, and a smoothing capacitor 6, a direct-tally type I41 voltage outlet (including control circuits 7, 8, etc.), and converts the DC η of each III control circuit fTJ into voltages V, V2 1, a current output circuit 3 is connected to a primary 1111IIl consisting of a diode bridge 9 and a smoothing capacitor IQ; capacitor 1
3. Cylindrical frequency transformer 14, diode 15j and smoothing capacitor 16 to 0 (secondary gain 11 rectifier circuit, motor drive circuit 1B, motor control circuit 18, rotation speed setting circuit 1)
9. It has a high frequency transformer 20 and the like, and outputs a DC voltage for driving a fan motor, for example, a transistor motor 21. That is, this power supply circuit 3 converts the direct OrL voltage obtained from the -order 1110 rectifier circuit into a one-frequency voltage by switching the transistor 11 based on the output of the rotation speed setting circuit 17 and the motor control circuit 16, and converts it into a high-frequency voltage. After the voltage is transformed by a transformer 14, it is converted into a DC voltage by a square rectifier circuit, and the same current and voltage are sequentially supplied to each phase of the motor 2I by a motor drive circuit 17. Note that the output vehicle pressure of the secondary side rectifier circuit is fed back to the motor control circuit 18, thereby stabilizing the rotation speed of the multi-motor 210.

[Problems with background technology]

By the way, in such a power supply circuit device, the high frequency transformers 12 and 18 of the power supply circuit 3 are small in size, but the transformer 4 of the power supply circuit 2 is intended for commercial frequencies, so it has a lower output than the high frequency transformer. However, it is large in size and has the disadvantage that it leads to an increase in the size of the power supply circuit device, which is contrary to the trend toward miniaturization and thinning of air conditioners. Also, the series voltage control circuit 7 of the power supply circuit 2
, 8 have the disadvantage of poor efficiency because they consume power 7i,-.

Therefore, it is conceivable to use the power supply circuit 2 as a general switching width source circuit;
Since the circuit generates significant noise, it cannot be used for the electronic circuit 11 of an air conditioner.

[Purpose of the invention]

This invention was made based on the above five circumstances.
The purpose of this is to be able to reduce the size of the air conditioner, thereby making it possible to effectively utilize the space in the air conditioner, and also to satisfy the need for smaller or thinner air conditioners. Furthermore, it is an object of the present invention to provide a power supply circuit device for an air conditioner that can improve efficiency and reduce noise.

[Summary of the invention]

This invention converts the DC power supply circuit for the control circuit into a switching acid source circuit, and connects the primary side rectifier circuit of the DC power supply circuit for the control circuit in parentheses and the motor/pivot circuit. [In addition to standardizing the primary rectifier circuit of the switching power supply circuit for V, the high frequency transformer of the DC power supply circuit for the control circuit and the high frequency transformer of the quasi-E class switching power supply circuit for motor drive are connected to the This is a common high-frequency transformer.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. However, in the drawings, the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

@2 As shown in Figure 2, an AC power supply 1 is connected to a primary rectifier circuit consisting of a diode bridge 9 and a smoothing capacitor 1o, a transistor 11, a damper diode 12, and a resonant capacitor 13 to the primary coil of a high-frequency transformer 3o with multistage output. 30a is connected. On the other hand, 'Power supply 1 has
The primary coil 31a of the high frequency transformer 31 is connected through the collector-emitter of the NPN transistor 32 and the above-mentioned -order 1[111'& current circuit.

There is a resistor of 3 between the collector and base of the transistor 32.
A resistor 34 and a secondary coil 31d of a high frequency transformer 31 are connected between the base and the emitter. High frequency transformer 31 and transistor 3
A self-excited high-frequency oscillation circuit is constructed using only one main wire.

Therefore, the secondary coil 31b of the high frequency transformer 31
The collector and emitter of the transistor 11 are connected through the 'i resistors 35 and 36.

Further, a pressure control circuit 40 for a pressure control circuit is connected to the secondary coil 31C.

And the secondary coil 30bK of the high frequency transformer 3θ
is connected to the smoothing capacitor 4) via the output voltage 4θa of the control circuit 4o. A smoothing capacitor 42 is connected to the secondary coil 90c via an output contact 40b.

The output contact 1 of the motor control circuit 18 is connected to the secondary coil 3od.
A flat/μs capacitor 43 is connected via 8a. Here, the 4L pressure control circuit 40 for the control circuit has an output contact 40
a.

By controlling 40b on and off, constant DC voltages v, ,'v are applied from both ends of the smoothing capacitors 41 and 42, respectively.
2, it feeds back constant DC voltages V,, V, for stabilization, and receives the output of the secondary coil 31C of the high frequency transformer 31 to synchronize the on/off system. There is. Motor (1, 11
The wholesale circuit 18 controls the output contact 18a on and off according to the command from the rotation speed setting circuit 19, and controls the output contact 18a to turn on and off the smoothing capacitor 43.
A predetermined DC voltage for driving the motor is generated from both ends of the motor, and in order to stabilize the DC voltage, the DC voltage is fed back, and the high frequency transformer 31 is turned on and off (to synchronize Al). Secondary coil 3I
The output of C is arranged to be passed through the voltage control circuit 40 for the control circuit.

In other words, the DC power supply circuit for the control circuit, which is designed to maintain a constant DC voltage V, V, is converted into a quasi-E class switching power supply circuit, and the primary side of the DC power supply circuit for the control circuit is transformed into a quasi-E class switching circuit. The rectifier circuit and the primary side rectifier circuit of the semi-E class switching power supply circuit for driving the motor are integrated together, and the high frequency transformer for both is shared by a high frequency transformer 40 with multi-stage output. In other words, the DC power supply circuit for the control circuit, the motor, and the quasi-E class switching power supply circuit for i-pivot are integrated into one quasi-E class switching power supply circuit.

Therefore, there is no need for a large transformer as in the prior art, and it is possible to significantly downsize the device. In particular, efficiency can be improved because the conventional direct voltage control circuit 11 type is not used.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without changing the gist.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reduce the size of the air conditioner7, thereby making it possible to effectively utilize the space in the air conditioner, and furthermore, to make the air conditioner smaller or thinner. Mζ can be added, and more efficiency is improved. "□ 0 I □ □ □ □, yoyo, 5, 1st, 9 ゜ 1 Organizational channel can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional device, and FIG. 2 is a block diagram showing an embodiment of the present invention. 1...Commercial AC' power supply, 2...DC type for control circuit
'Original circuit, 3...Motor drive Q, E class switching' turtle circuit, 2...Transistor motor (fan motor), 40...High frequency transformer. Applicant's agent Patent attorney Takehiko Suzue
:(〒 Kazuo Sugi, Tono 1.1 Name of "Patent Application No. 57-233522 2, Issue 11y" Person who installs power supply circuit for air conditioner 3-t'ili+I3, 14 cases and.Relationship'(!

Claims (1)

[Claims] Connected to an AC power supply, the output of the 6L source is converted to low voltage for the control circuit and output.
DC acid source 1 for the d41 circuit is connected to an AC source, and the output of the acid source is converted to a specified DC T voltage for fan motor agitation and is output as a semi-E class winch for motor oscillation. and a power supply circuit for the fili side j circuit [α
The drift source circuit is made into a quasi-E class spin inductance recovery circuit, and the primary side rectifier circuit of the drift power supply circuit for the control side J circuit and the primary side 1ul of the drift power supply circuit for the motor drive E class switching power supply circuit are
1 rectifier circuit, and the high frequency transformer of the DC power supply circuit for the control 11 circuit and the high frequency transformer of the morph drive errand E class switching power supply circuit are made common by a multistage output high frequency transformer. Air conditioner power circuit - #, value,.