KR20110079032A - Ac power conversion, power air conditioners - Google Patents

Abstract

PURPOSE: An AC power conversion power air conditioner is provided to omit a chargeable battery and a conversion lamp of a power supply, thereby miniaturizing a device. CONSTITUTION: A solar battery(100) collects solar light. An electricity generating unit generates power of a DC current by the collected light. An inverter unit(200) converts power of the DC current into an AC current. A transformer unit(300) adjusts the voltage of AC power converted in the inverter unit. A power line electrically connects the secondary side of the transformer nit with the secondary side of a commercial power side transformer.

Description

AC power conversion, power air conditioners

The present invention relates to an air conditioner that performs air conditioning indoors, and more particularly, to an air conditioner equipped with a photovoltaic device having a solar cell (100) for generating solar power as an energy source and supplying the generated power as a commercial power source. An air conditioner that performs air conditioning in a room conducts heat exchange with a refrigerant, for example, heating mode, cooling mode, drying mode, and comparing the set temperature with the room temperature at the start of operation. It operates in each operation mode such as 'automatic operation mode' which automatically selects one of the mode and cooling mode.

In such an air conditioner, various operation settings, such as operation / stop, operation mode setting, operation condition setting, etc., can be made by remote operation by an attached remote control device.

In the air conditioner, a so-called solar air conditioner using solar energy as a power source has been developed. In this solar air conditioner, electric power generated by sunlight absorbed by the solar cell 100 is used as a power source of the air conditioner.

In the solar air conditioner, the power generated is dependent on the climate and time of day, so it is used in combination with commercial power sources that have been used in the past. In order to ensure stable air conditioning operation by controlling the distribution of electric power using the above-mentioned power source, the solar air conditioner of the above-described configuration can only use the generated power generated by solar power for the solar air conditioner. Even when the solar air conditioner was stopped, the power generated by the solar power could not be used effectively despite the power generation capability.

For this reason, a proposal has been made to supply power generated by solar air conditioners to general commercial power sources. Such solar air conditioners supply power generated by solar power as commercial power and have been developed by solar power. The power supply system is designed to use the commercial power combined with the electric power, which makes it possible to effectively use the power generated by the solar power, but when supplying the power generated by the solar power as the commercial power supply. In order to know the amount of power, expensive meters are needed.

In addition, even if the solar power generator had a function of displaying the power generation status, it was not possible to simply check the power generation status because the solar power generator was outdoors. The device itself for managing and controlling the generated power was also relatively large. On the other hand, the air conditioner used in the general household is being miniaturized, and if the solar power generation unit integrated with such an air conditioner is enlarged, it is installed. In addition, in such a photovoltaic device, it is necessary to match the generated power with the frequency, voltage, and phase of the commercial power supply accurately, and to prevent the power outage of the commercial power supply to prevent overload of the photovoltaic device. It is necessary to detect them correctly, and to perform these detection and control separately, it is necessary to configure the photovoltaic device. At the same time, the size of the device is increased, and control of the photovoltaic device using a commercial power source stops the operation when a power failure occurs, making it impossible to properly monitor the photovoltaic device. For example, if there is a room where you want to keep the air condition at a certain temperature or humidity at all times, the power consumption of the commercial power source may change depending on the climate or time, resulting in unpredictable and unexpected expenses.

1020020027461

1019980029556

Another object of the present invention is to provide a photovoltaic device that enables the miniaturization in a simple configuration, and at the same time enables the proper management of the output power and the protection of the device. The present invention provides a photovoltaic device capable of monitoring the proper operation even in the event of a power failure and outputting stable AC power. Another object of the present invention is to match the frequency and voltage with a commercial power source, as well as to output a commercial power source. The present invention provides a photovoltaic device capable of outputting proper power in accordance with the phase of a commercial power supply. It is to provide a commercial power supply by solar energy which can detect There is provided an aspect in a practical range that can continue operating for a long period of time even marginally suppress consumption of commercial power to the installation of the battery 100 is a commercial power source supplying function attached air conditioner.

The air conditioner, which is an air conditioner with a solar power generator, has an indoor unit and an outdoor unit, and receives an operation signal (for example, a signal using infrared rays) transmitted from a remote control switch by the indoor unit. Temperature, air volume, and wind direction are set according to the received signal, and air conditioning operation and stop by various operation modes such as "heating", "cooling", "dehumidification" (drying) based on this setting are performed. The outdoor device of the air conditioner is connected to a solar cell that absorbs sunlight and converts it into electrical energy. The electrical energy generated by the solar cell 100 (hereinafter referred to as “generation power”) is connected to the outdoor device. The commercial power supply (hereinafter referred to as "commercial power supply") is attached to the attached commercial power supply and the photovoltaic device by the solar cell 100 It is configured.

Since the power supply is supplied to the power supply even when the commercial power supply is out of power, the inside of the device can be properly controlled and monitored, and the configuration is extremely simple since no switching of the battery or power is required.

The commercial power supply unit can operate the air conditioner indoors and outdoor units even when the indoor unit outdoor unit of the air conditioner is stopped while the commercial power supply unit is running and the commercial power supply unit such as night is stopped. The indoor and outdoor devices of the air conditioner will be described. As shown in FIG. 2, a thick pipe refrigerant pipe and a custom pipe refrigerant pipe are installed between the indoor device and the outdoor device of the air conditioner. Each end is connected to a heat exchanger in the indoor unit. The other end of one refrigerant pipe is connected to the valve in the outdoor unit. The valve is connected to a four-way valve via a muffler. Both sides of the pipe connected to the pressure injector, the compressor and the muffler are connected and again connected to one side of the heat exchanger. Has the other end of the refrigerant pipe is connected via a capillary, strainers, valves. In addition, between the muffler 30B and the four-way valve, and between the heat exchanger and the capillary tube, a solenoid valve is connected. This establishes a sealed refrigerant circuit, that is, a refrigeration cycle, between the indoor unit and the outdoor unit. The operation mode is switched to the cooling mode, the heating mode, or the dehumidification (drying) mode by switching the four-way valve and opening and closing the solenoid valve. The indoor device is provided with a power supply board 38 and a control board. The power supply board 38 is supplied with AC power for operating an air conditioner and outputs electric power for driving various electric motors in the indoor device. A control circuit power supply for outputting power for control circuits and a series circuit power supply for outputting power for series circuits are provided. The control board includes a series circuit, a drive circuit for driving each motor and a series circuit, and a drive circuit. And a microcomputer to control the operation of the air conditioner, and the drive circuit includes a fan motor (DC brushless motor) that drives a crossflow fan (not shown) that blows wind toward the interior. The power relay for opening and closing the contacts of the circuit and the flap motor for adjusting the wind direction are connected. In accordance with the signal from the microcomputer, the number of rotations of the fan motor, that is, the amount of air blown out of the indoor unit by the crossflow fan, is controlled. By changing in stages, the air volume can be controlled very finely. At this time, the microcomputer controls the flap motor as necessary to control the wind direction as well as the air flow from the indoor politics. The microcomputer displays the operation status and operation mode of the air conditioner by LED lamps, Display board with transmitting / receiving circuit, sensor board with floor sensor and light sensor, self-diagnosis switch Switch board 72 with operation switching switch together with self-diagnosis LED, room temperature sensor for detecting room temperature and temperature in heat exchanger As shown in Figure 4, the outdoor unit is equipped with a rectifier circuit and a control board, and the terminals are connected to the terminals of the indoor unit by a communication line and a power line (see Fig. 1). Transmission of serial signals according to control signals from the microcomputer between the indoor unit and the power supply at the same time This control is performed to control the frequency of the AC power supplied to the compressor (for example, between 18 Hz and 150 Hz) and to control the operation of each device. The control board is provided with a series circuit and is connected to the series circuit of the indoor device. In addition, the control board is provided with a switching power supply and a microcomputer for supplying power to an inverter circuit for driving a plurality of noise filter compressors for removing noise. By varying the frequency of driving the compressor output from the inverter circuit, it is possible to control the cooling and heating capacity by changing the number of revolutions of the compressor. The control board is connected with a 4-way valve and a solenoid valve in the outdoor device. Switching and opening / closing of the solenoid valve are performed to switch the operation mode. The control board is connected to a fan motor and a fan motor capacitor of the heat exchanger, and the microcomputer of the control board is connected to an outside temperature thermistor for detecting the outside temperature, a coil temperature thermistor for detecting the temperature in the heat exchanger, and a compressor for detecting the temperature of the compressor. The thermistor is connected, and the compressor is operated while detecting the operation of the fan motor, the operation state of the compressor, and the outside air temperature. As shown in Fig. 15A, the remote control switch for operating the air conditioner is internal. The transmitter and the temperature sensor are installed on the surface, and the display unit to display the operation status of the air conditioner is installed on the surface, and the switch unit to perform the operation operation. Various switches are installed. As shown in Fig. 15B, the switch section of the remote control switch is provided with various button switches exposed by opening and closing the cover. These button switches include a start / stop button, an operation switching button, a temperature button for setting a temperature, a wind direction button for adjusting the wind direction, a wind volume button for adjusting the air volume, a timer button for switching the timer, a start time button for setting a timer, and an end time Buttons, time setting buttons, etc. are installed, and minor operation setting of the air conditioner is possible. This switch section is provided with a display switching button for displaying the operation status of the commercial power supply described below on the display section. have. However, as shown in FIG. 5, the commercial power supply of the photovoltaic device is constituted by an inverter circuit and a microcomputer, and the electric power generated by the solar cell 100 is supplied to the inverter circuit. The power supply unit includes a power generation current detection unit for detecting a power generation state of the solar cell 100 and a series power failure detection unit and a series power detection unit for determining a series connection between a power generation voltage detection unit and a commercial power source. Power for operation is provided. The solar cell 100 that absorbs sunlight is installed in a frame in which a plurality of modules are installed in a frame and exposed to sunlight such as a roof of a building. Power generation obtained by converting sunlight in the solar cell 100 The power is supplied to the inverter circuit. That is, the solar cell 100 generates DC power of a predetermined voltage by a plurality of modules, and the DC power is supplied to the inverter circuit. In the inverter circuit, DC power is converted into AC (for example, saw blade wave) at the same frequency as commercial power (for example, 50 Hz or 60 Hz) according to a switching signal supplied from a microcomputer. The power converted into alternating current in this inverter circuit is supplied to the commercial power supply via a transformer, and the alternating current output from the inverter circuit passes through the transformer to delete the direct current component. The parallel cut-off conductor is installed in the circuit, and the parallel cut-off conductor cuts off the commercial power supply and the commercial power supply when the photovoltaic device or commercial power supply fails.

1 is a schematic diagram showing the present invention

Claims (1)

An inverter unit 200 installed between the power generation unit and the connection point of the commercial power source and configured to output DC power by converting the DC power into AC power by a pseudo sine wave by the operation of a switching element according to a predetermined switching signal; The sequence power detector detects a change in the instantaneous value of the AC power supply, and the phase change of the alternating power by the pseudo sine wave coincides with the commercial power at a preset timing by determining the zero cross point from the detection result of the series power detector. An inverter controller for outputting a signal; a commercial power supply (commercial power supply) using solar energy for supplying electric power generated as sunlight as an energy source to a commercial power source, the solar cell 100 condensing sunlight and A power generation unit for generating electric power of a direct current based on the light collected by the solar cell 100, and a direct current generated by the power generation unit An inverter unit 200 for converting electric current into an alternating current, a transformer unit 300 for adjusting the voltage of AC power, and a secondary side of the transformer unit 300 and a secondary side of a commercial power supply transformer A switch including an electrical power supply line connected to the power supply line, a switch interposed between the transformer line 300 and the commercial power supply side transformer via a predetermined signal, and a series including a frequency and voltage of the commercial power supply. Inverter unit 200 and transformer unit 300 based on the series discriminating means for discriminating, the third harmonic detecting means connected to the secondary side of the commercial power supply side transformer, and detecting the third harmonic, and the series determined by the series discriminating means. The first control means for controlling the control panel and the third harmonic detection means for detecting the third harmonic and controlling the switch to electrically open the transformer 300 to the commercial power side transformer. Control number Alternating-current power converted by the power conditioner to the pseudo sinusoidal wave which is characterized by having

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