JPH07293983A - Air conditioner - Google Patents

Abstract

PURPOSE:To make useable a fan electric motor irrespective of the magnitude of supplied voltage and prevent any trouble from being produced owing to forgotten wiring of a power supply by converting voltage of power supplied to either an indoor or an outdoor unit to a predetermined voltage whatever that voltage is and supplying that voltage to the fan electric motor. CONSTITUTION:A voltage converter 1 converts voltage (e.g. AC 200 volt) of power supplied to any of indoor units 101, 102 or an outdoor unit 200 to a predetermined voltage irrespective of that voltage, and supplies it to a fan electric motor. The fan electric motor is controlled in its revolutions by the supplied converted voltage. Hereby, the fan electric motor is made useable irrespective of the magnitude of the supplied voltage, and any trouble of the fan electric motor is prevented from being produced owing to forgotten wiring of a power supply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that performs hot water heating operation and electric cooling operation, and more particularly to a power supply device for an air conditioner that is divided into an outdoor unit and an indoor unit.

[0002]

2. Description of the Related Art As an air conditioner, a combination of a hot water heating device for circulating hot water warmed by a burner and an electric cooling device for cooling by using heat of vaporization of a refrigerant (hereinafter, abbreviated as gas air conditioner) Yes.) Is known.

On the other hand, most of today's air conditioners have a system configuration divided into an outdoor unit and an indoor unit, and these air conditioners are roughly classified into one indoor unit and one outdoor unit. There are a single system in which one pair is connected to each other, and a multi system in which a plurality of indoor units and one outdoor unit are connected to each other in N pairs.

Conventionally, the power source of the above multi-system is shown in FIG.
As shown in, each indoor unit 100, the outdoor unit 2
In 00, the power supply wiring is individually drawn from the commercial power supply.

[0005]

However, there are two types of power supply voltage, 100 volt and 200 volt. Generally, the indoor unit is 100 volt specification and the outdoor unit is 200 volt specification. Not only that, but due to wiring conditions and other reasons, there are cases where 100-volt and 200-volt indoor units are mixed. Therefore, even though they are the same indoor unit, it is necessary to produce two types of indoor units, and there are problems such as designing and manufacturing, and other types of parts based on consideration of insulation due to voltage differences. there were.

Further, particularly in the case of a gas air conditioner, the hot water pipes 6 and 7 should be wired as shown by the solid lines as shown in FIG. 3, but they are erroneously piped as shown by the broken lines. If the power supply wiring was not performed, hot water would be supplied to the indoor unit that was not wired during the operation, but the electric system would not operate, and there was a risk that it would be concentrated in the winter and burst.

Therefore, an object of the present invention is to provide an air conditioner which can be used regardless of the magnitude of the voltage supplied and which can prevent a failure caused by forgetting to wire the power supply.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided in an indoor unit in a separation type air conditioner composed of an indoor unit and an outdoor unit, A radiator that is heated when hot water is supplied, a heat exchanger that is configured integrally with this radiator and that is cooled by suddenly reducing the pressure of the compressed refrigerant, and a heated radiator and / or a cooled radiator. The electric power supplied to either the indoor unit or the outdoor unit, which blows air to the heat exchanger to enable indoor heating, cooling, and dehumidifying operations, and the power supplied to either the outdoor unit or the indoor unit And a voltage conversion device for converting the electric power to the electric power of the voltage and supplying the electric power to the blowing motor.

According to a second aspect of the present invention, in a separation type air conditioner composed of an indoor unit and an outdoor unit, a radiator provided in the indoor unit and heated by supplying hot water, A heat exchanger that is configured integrally with this radiator and is cooled by abrupt decompression of the compressed refrigerant, and air is blown to the heated radiator and / or the cooled heat exchanger to perform indoor heating operation and cooling. Blower electric motor that enables operation and dehumidification operation, and converts the electric power supplied to either the indoor unit or the outdoor unit into electric power of a voltage within a predetermined range regardless of the voltage of the electric power, and for the air blowing And a voltage conversion device which supplies the electric motor to control the rotation speed of the blower electric motor.

According to a third aspect of the present invention, in a separation type air conditioner composed of an indoor unit and an outdoor unit, a radiator provided in the indoor unit and heated by supplying hot water, A heat exchanger that is configured integrally with this radiator and is cooled by abrupt decompression of the compressed refrigerant, and air is blown to the heated radiator and / or the cooled heat exchanger to perform indoor heating operation and cooling. Blower electric motor that enables operation and dehumidifying operation, and electric power supplied to either one of the indoor unit and the outdoor unit is converted into electric power of a predetermined voltage regardless of the voltage of the electric power, and the electric power of the electric motor for blowing And a voltage conversion device that supplies electric power for controlling the air conditioner.

[0011]

According to the first aspect of the present invention, the voltage conversion device converts the voltage of the electric power supplied to either the indoor unit or the outdoor unit into a predetermined voltage regardless of the voltage for blowing air. Supply to the electric motor. The blower motor rotates under the supplied conversion voltage and blows air to the heat exchanger to perform heating operation, cooling operation, and dehumidifying operation of the room.

According to the second aspect of the invention, the voltage conversion device converts the voltage of the electric power supplied to either the indoor unit or the outdoor unit into a voltage within a predetermined range regardless of the voltage. To the blower electric motor to control the rotation speed of the blower electric motor. The rotation speed of the blower electric motor is controlled by the supplied conversion voltage, and thus the amount of blown air to the heat exchanger is controlled, and indoor heating operation, cooling operation, and dehumidifying operation are performed.

According to the third aspect of the present invention, the voltage conversion device converts the voltage of the electric power supplied to either the indoor unit or the outdoor unit into a predetermined voltage regardless of the voltage for blowing air. It is supplied as electric power for driving the electric motor and electric power for controlling the air conditioner. The blower motor is rotated by the supplied converted voltage to blow the heat to the heat exchanger, and the control power controls the air conditioner to perform heating operation, cooling operation, and dehumidifying operation of the room.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings.

FIG. 1 shows an outline of an embodiment of the present invention. Each indoor unit 101, 102 has a radiator that is heated by supplying hot water, a heat exchanger that is configured integrally with this radiator and that is cooled by rapidly reducing the pressure of the compressed refrigerant, and a heating The air conditioner and the heat exchanger are provided with an electric motor for blowing air, and heating of the radiator and operation of the electric motor for blowing enable heating operation of the room, and cooling of the heat exchanger (as an evaporator in the refrigeration cycle Function) and the operation of the blower electric motor, it becomes possible to perform the cooling operation in the room, and the heating by the heater and the cooling by the heat exchanger are performed at the same time, and the blowing by the blower motor is performed in the order of the heat exchanger and the radiator. Dehumidification operation in the room becomes possible.

As shown in FIG. 1, the outdoor unit 200 is wired with a commercial power source (ex. AC200V). A power supply (ex. 200 volt) is branched from the outdoor unit 200 to each indoor unit 100. The power from the branch wiring is input to the voltage conversion device 1 built in each indoor unit. Although not shown, hot water piping is also connected from the outdoor unit 200 to each indoor unit 100 by piping.

FIG. 2 shows a block diagram of the voltage conversion device 1. The voltage conversion device 1 includes a noise filter 2 that removes noise included in the supplied power, a diode bridge 3 for full-wave rectification, smoothing capacitors C1 and C2, and a voltage doubler control IC 4 (MK1210-4155 manufactured by Shindengen Co., Ltd.). , And a switching power supply (switching frequency 150 kHz).

The voltage doubler control IC 4 internally includes a switching element TR according to a voltage applied to the diode bridge 3.
When the supplied voltage is AC100V, the switching element TR is turned on to form a voltage doubler circuit together with the capacitors C1 and C2.
A DC voltage of 280V DC is obtained from AC power of C100V. This DC voltage of DC280V is the switching power supply 5
Is supplied to.

When the voltage supplied to the diode bridge 3 is AC200V, the switching element TR is turned off.
F to form a normal full-wave rectifier circuit with capacitors C1 and C2, and convert AC200V AC power to DC280V
Obtain the DC voltage of. This DC voltage of 280 V DC is also supplied to the switching power supply 5.

The switching power supply 5 includes DC5V and DC1.
It outputs DC power that can be varied from 2 to 36 VDC. D
C5V is a microcomputer for controlling the air conditioner, LE for display
Used for driving D, auxiliary relay, etc., DC12-D
The variable voltage of C36V is selectively applied to the three-phase stator winding of the blower motor M by the inverter circuit INV to control the rotation of this motor M (brushless DC motor).

Therefore, by changing the voltage applied to the electric motor M in the range of DC12 to DC36V, the rotation speed of the electric motor for the blower, that is, the blowing amount can be changed.

Therefore, the indoor units 101, 1
02 can be used as it is without changing the internal configuration when receiving 200 V power supply from the outdoor unit as shown in Fig. 1, and when it is used in a single system, it is automatically powered by commercial power supply. Even when (100 volt) is taken, the voltage conversion circuit 1 can automatically convert the voltage into a necessary voltage and output it, so that the configuration of the indoor units 101 and 102 can be made common.

[0023]

As described above, according to the inventions described in claims 1 to 3, since the voltage conversion circuit is built in the unit, the unit can be used regardless of the magnitude of the voltage supplied. As a result, it is possible to provide an air conditioner in which the units can be used in common and a failure caused by forgetting to wire the power supply can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an embodiment of the present invention.

FIG. 2 is a block diagram showing a voltage conversion circuit according to an embodiment of the present invention.

FIG. 3 is a block diagram showing an outline of a conventional air conditioner.

[Explanation of symbols]

 1 Voltage conversion circuit 2 Noise filter 3 Double voltage rectification circuit 4 Control IC 5 Switching transformer 6, 7 Hot water piping 100, 101, 102 Indoor unit 200, 201, 202 Outdoor unit

Claims (3)

[Claims] 1. In a separation type air conditioner composed of an indoor unit and an outdoor unit, a radiator provided in the indoor unit and heated by supplying hot water, and a radiator integrated with the radiator. The compressed refrigerant is rapidly decompressed to cool the heat exchanger, and the heated radiator and / or the cooled heat exchanger are blown to perform indoor heating operation, cooling operation, and dehumidifying operation. And a voltage conversion device for converting the electric power supplied to either the indoor unit or the outdoor unit into electric power of a predetermined voltage regardless of the voltage of the electric power and supplying the electric power to the electric motor for blowing. An air conditioner characterized by that. 2. In a separate type air conditioner composed of an indoor unit and an outdoor unit, a radiator provided in the indoor unit and heated by supplying hot water, and a radiator integrated with the radiator. The compressed refrigerant is rapidly depressurized to cool the heat exchanger and the heated radiator and / or the cooled heat exchanger to blow air to enable heating, cooling, and dehumidifying operations in the room. The blower electric motor and the electric power supplied to either the indoor unit or the outdoor unit are converted into electric power having a voltage within a predetermined range regardless of the voltage of the electric power, and the electric power is supplied to the blower motor to supply the blower. An air conditioner comprising: a voltage conversion device that enables control of the rotation speed of an electric motor for use. 3. In a separate type air conditioner composed of an indoor unit and an outdoor unit, a radiator provided in the indoor unit and heated by supplying hot water, and a radiator integrated with the radiator. The compressed refrigerant is rapidly decompressed to cool the heat exchanger, and the heated radiator and / or the cooled heat exchanger are blown to perform indoor heating operation, cooling operation, and dehumidifying operation. The blower electric motor and the electric power supplied to either the indoor unit or the outdoor unit are converted into electric power of a predetermined voltage regardless of the voltage of the electric power, and the electric power of the blower electric motor and the air conditioner are controlled. An air conditioner comprising: a voltage conversion device for converting to electric power.