RU203595U1 - DEVICE FOR CHECKING THE OPERATION OF THE CONTROL BOARD OF THE INVERTER COMPRESSOR OF THE EXTERNAL UNIT OF THE AIR CONDITIONING SYSTEM - Google Patents

Abstract

The utility model relates to the field of electrical devices for diagnostics of the electrical network and electronic components, in particular for testing the operation of the inverter compressor control board of the external unit of the Daikin comfort air conditioning system and other similar types. The device includes three phase indicator circuits, each of which consists of current limiting resistors , two LEDs and a capacitor. To increase the duration of the operating time, resistors of increased power of 5 or more watts are used. The device is supplemented with a piezo-buzzer for sound indication, a text screen and a microcontroller, which is connected to the LEDs by galvanic isolation of the circuit through optocouplers. An additional advantage of the claimed device is the ability to send a sound signal by the device and display text on the screen, which does not require the constant presence of personnel to control the device ...

Description

The utility model relates to the field of electrical devices for diagnosing the electrical network and electronic components, in particular for checking the operability of the inverter compressor control board of external units of Daikin comfort air conditioning systems and other similar types of air conditioning systems, as well as for household and semi-industrial Split air conditioners (air conditioning system divided into 2 units outdoor and indoor) and SKY (Daikin model range), for multi-zone VRV (Variable Refregerant Volume - system with variable refrigerant flow) systems.

An inverter checker device F93 / F99 is known from the prior art [https://m.culmi.com.my/?ws=showproducts&products_id=506788]. The device is designed to test the functionality of the inverter compressor control board of external units of Daikin comfort air conditioning systems. The disadvantage of the known device is that it can be used only for systems with test phase voltage from 100 V to 180 V AC, the same device is not used for VRV systems.

Known device for checking the power stage of the inverter produced by Mitsubishi Electric [htts: //www.mitsubishi.ru/files/InverterChecker_IB.pdf]. The disadvantage of the device is the limitation of the use of this device in time, no more than 10 minutes continuously, in order to avoid overheating of the device.

Known device Refco INVERTER-CHECK-KIT [https: /www.trutechtools.com/Refco-Inverter-Check-Kit-wData-Flow-Monitor_p_4930.html,], which is designed to test air conditioners, heat pumps and refrigeration generators based only on inverter systems. The disadvantage of the known device is the limitation of the use of this device in time - no more than 10 minutes continuously, in order to avoid overheating of the device.

The closest in technical essence to the claimed device is the invertor checker max 415 device manufactured by Daikin [https://airconservice.ru/pribory-dlya-diagnostiki.] Containing three phase indicator circuits located on the printed circuit board, each of which consists of current limiting resistors , two LEDs and a capacitor, the first leads of the resistors are the inputs of the device, the second leads of the resistors are connected, respectively, to the anode of the first and the cathode of the second LED of the circuit.

The disadvantage of the known device is the limitation of continuous use in time - no more than 10 minutes, due to overheating of the device, as well as the need for constant monitoring of the device indication.

The problem to be solved by the claimed utility model is to create a device that allows troubleshooting and other abnormal situations in the process air conditioning system, mainly produced by Daikin, conducting an initial survey without dismantling the process equipment using the device for more than 10 minutes.

The technical result achieved by the claimed utility model is to expand the arsenal of technical means, in particular, devices for testing the operability of the inverter compressor control board of external units of comfort air conditioning systems with increased continuous operation time, as well as the presence of an audible alarm when a malfunction is detected.

The technical result is achieved by the fact that the device for testing the operability of the control board of the inverter compressor of the external unit of the air conditioning system, including three phase indicator circuits located on the printed circuit board, each of which consists of current limiting resistors, two LEDs and a capacitor, the first terminals of the resistors are the inputs of the device, the second terminals of the resistors are connected respectively to the anode of the first and the cathode of the second LED, according to the utility model, to increase the operating time, resistors of increased power of 5 watts or more are used, while the device is supplemented with a piezo-beeper for sound indication, as well as a text screen and a microcontroller with LEDs by galvanic isolation of the circuit through optocouplers.

The claimed utility model is illustrated by Figs 1-3.

FIG. 1 shows an electrical diagram of the device, which has the following structural elements.

FIG. 2 shows a block diagram of the device.

FIG. 3 shows the external view of the device.

The device includes the following structural elements:

1, 8, 13 - Resistor R1-R3, 5 W, 12 kOhm - 3 pcs. (Fig. 1);

4, 10, 16 - Capacitor C1-C3, 0.01 μF - 3 pcs.;

3, 5, 9, 11,15, 17 - Output LED1-LED6 red 5 mm - 6 pcs. (Fig. 1, 3);

2, 6, 7, 12, 14, 18 - Optocoupler U1-U6 - 6 pcs.;

19 - Microcontroller Arduino Uno А000066 - 1 pc. (Fig. 1, 2);

20 - Pieza-buzzer AMP-X030 (Fig. 1, 2, 3);

21 - Text screen 16 × 2 with interface I ² C (Fig. 1, 2, 3);

22 - Button for resetting the controller state (Fig. 2, 3).

For a long operating time, resistors of increased power R1-R3 (Fig. 1 pos. 1, 8, 13), 5 W, 12 kOhm are used. Capacitors C1-C3 (pos. 4, 10, 16) are used to smooth out high-frequency noise and stabilize the voltage for powering LED1-LED6 LEDs. Resistors R1-R3 in combination with capacitors C1-C3 act as a low-pass filter to eliminate the influence of third-party interference on the operation of the device and the glow of LED1-LED6 LEDs (pos. 3, 5, 9, 11, 15, 17). LEDs LED1 (3), LED3 (9) and LED5 (15) light up on the positive half-wave of the voltage, LED2 (5), LED4 (11) and LED6 (17) light up on the negative half-wave of the voltage of the U, V and W phases, respectively , during normal operation of the device, the phase shift angle is 120 degrees. Optocouplers U1-U6 (pos. 2, 6, 7, 12, 14, 18) are used for galvanic isolation of the power supply circuit of the device and the control circuit of the controller. When a voltage occurs on the LED1-LED6 LEDs, the optocouplers U1-U6 send a signal to the controller (19), which processes the sequence of signals and displays an error on the text screen (21), while the signals correspond to a certain sequence of LED lighting. When an error occurs, the piezo buzzer (20) produces an audible signal. The constant presence of personnel near the device is not necessary, the controller will remember the error state of the compressor operation until the reset button is pressed.

The device is used as follows. Before connecting the device, check the voltage at the power supply terminals of the air conditioning system (U, V, W Fig. 1) and at the corresponding compressor connection terminals (U, V, W) to make sure that the capacitors are completely discharged. After that, the device is connected to the tested inverter compressor control board, power is supplied to the air conditioning system, the air conditioner is switched on in normal mode or in test mode. The status of the six LEDs LED1-LED6 on the inverter tester is monitored. When the inverter enters the normal mode, all six LED1-LED6 indicators blink alternately in the order of the phases, the LEDs glow uniformly. In the event of a malfunction, the LEDs do not light up, or they light up unevenly or dimly. In this case, check for any faults on the power board and the wiring between the power board and the compressor. After completing the diagnostics, turn off the power and you must wait at least 5 minutes to complete the discharge of the capacitors of the power supply, after which the device can be turned off. Also, in case of malfunctions in the operation of the control board, in addition to the light signal, a sound signal appears, it is produced by a piezo beeper, and the Arduino controller displays the designation of the malfunction on the text screen. The ability to send a sound signal by the device and display text on the screen does not require the constant presence of personnel to control the device, which is an additional advantage of the proposed device.

Claims (1)

A device for testing the operability of the control board of the inverter compressor of the external unit of the air conditioning system, which includes three phase indicator circuits located on the printed circuit board, each of which consists of current limiting resistors, two LEDs and a capacitor, the first terminals of the resistors are the inputs of the device, the second terminals of the resistors are connected, respectively , to the anode of the first and cathode of the second LED, characterized in that resistors designed for a power of at least 5 W are used.

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