KR940020061A - Refrigerant type variable air conditioner and control method - Google Patents

Abstract

The present invention relates to an air conditioner that is separate and can be used for cooling, heating, and dehumidification. An auxiliary refrigerant container is installed in a pipe between an indoor unit and an outdoor unit via a three-way valve and an electronic expansion valve. By controlling the opening / closing control of the electronic expansion valve by a microcomputer, the installation work of the product is made easy, so the installation work efficiency of the product is improved and its working time is shortened. Also, the refrigerant in the pipe even after installation When the density decreases, the temperature sensor and the pressure sensor can sense the coolant density decrease and replenish the coolant, which can prevent the efficiency of heating, cooling or dehumidification cycle from being lowered. A refrigerant amount variable type air conditioner and a control method thereof.

Description

Refrigerant type variable air conditioner and control method

Since this is an open matter, no full text was included.

3 is a flowchart showing an operation sequence according to the present invention;

4 is a configuration diagram of a conventional air conditioner for circulating a refrigerant.

Claims (12)

A power supply means for receiving an AC voltage from an external power source and outputting a DC voltage, an indoor unit-side microcomputer for receiving an DC voltage output from the power supply means and outputting an operation start signal, and sensing an indoor temperature to detect an indoor temperature signal A refrigerant amount variable air conditioner having an indoor temperature sensor for outputting an indoor humidity sensor to the indoor unit side microcomputer and an indoor humidity sensor for sensing an indoor humidity signal and outputting an indoor humidity signal to the indoor unit side microcomputer: An outdoor unit-side microcomputer which receives an output operation start signal and outputs an operation signal for driving the compressor to a compressor driver for driving the compressor; An outdoor fan motor driver configured to receive an operation signal output from the outdoor unit side microcomputer and apply a driving voltage to the outdoor fan motor to rotate the outdoor fan circulating air around the outdoor heat exchanger of the outdoor unit side; A suction temperature sensor which senses a temperature of the refrigerant sucked into the compressor after the compressor is driven and outputs the suction temperature signal to the outdoor unit-side microcomputer; A suction pressure sensor which senses a refrigerant pressure at an inlet of the compressor after the compressor is driven and outputs a suction pressure signal to the outdoor unit-side microcomputer; A discharge temperature sensor which senses the temperature of the refrigerant discharged from the discharge port of the compressor after the compressor is driven and outputs the discharge temperature signal to the outdoor unit-side microcomputer; A discharge pressure sensor which senses the refrigerant pressure at the discharge port of the compressor after the compressor is driven and outputs the discharge pressure signal to the outdoor unit-side microcomputer; An auxiliary refrigerant passage in which a refrigerant is contained so as to replenish the amount of refrigerant in the pipes of the indoor unit and the outdoor unit; First valve driving means for receiving a refrigerant supplemental signal output from the outdoor unit side microcomputer and outputting a valve opening signal; An electromagnetic expansion valve which receives a valve opening signal output from the first valve driving means and opens a passage between the auxiliary refrigerant cylinder and the outdoor unit side pipe to introduce refrigerant in the auxiliary refrigerant cylinder into the pipe of the outdoor unit side; Second valve driving means for receiving a refrigerant suction signal output from the outdoor unit side microcomputer and outputting a valve opening signal; A three-way valve receiving a valve open signal output from the second valve driving means to open a passage between the outdoor unit side pipe and the auxiliary refrigerant container to introduce refrigerant in the outdoor unit pipe into the auxiliary refrigerant container; The outdoor unit side microcomputer senses the temperature and pressure of the refrigerant in the sub-refrigerant container to determine whether the amount of the refrigerant in the sub-refrigerant container is at an appropriate level, and outputs the refrigerant cylinder temperature signal and the refrigerant cylinder pressure signal to the outdoor unit A refrigerant cylinder temperature sensor and a refrigerant cylinder pressure sensor output to the microcomputer; Refrigerant amount comprising a display means for receiving the display signal output from the outdoor unit side microcomputer to the outside of the indoor unit to indicate that the refrigerant in the auxiliary refrigerant container to be replenished when the amount of the refrigerant in the auxiliary refrigerant container is less than an appropriate level Variable air conditioners. According to claim 1, The outdoor unit-side microcomputer; A suction temperature signal output from the suction temperature sensor, a suction pressure signal output from the suction pressure sensor, a discharge temperature signal output from the discharge temperature sensor, a discharge pressure signal output from the discharge pressure sensor, and the refrigerant A signal input unit configured to receive a refrigerant cylinder temperature signal output from the cylinder temperature sensor and a refrigerant cylinder pressure signal output from the refrigerant cylinder pressure sensor; A calculation unit which receives the refrigerant cylinder temperature signal and the refrigerant cylinder pressure signal output from the signal input unit and calculates the amount of refrigerant remaining in the refrigerant cylinder; A reference value storage section for storing reference values for each of the suction temperature, the suction pressure, the discharge temperature, the discharge pressure, and the amount of refrigerant in the auxiliary refrigerant container; The suction temperature and the reference suction pressure may be compared with each other by receiving the temperature and pressure signals output from the signal input unit and the reference temperature and reference pressure signals output from the reference value storage unit. A comparison unit for comparing the discharge temperature with the discharge reference temperature, comparing the discharge pressure with the reference discharge pressure, and comparing the refrigerant amount in the auxiliary refrigerant container with the reference refrigerant amount; When the suction temperature is smaller than the reference suction temperature by receiving the comparison result signal output from the comparison unit, when the suction pressure is lower than the reference suction pressure, when the discharge temperature is lower than the reference discharge temperature, and And outputting an operation signal for replenishing the refrigerant in the pipe to the first valve driving means in one of the cases where the discharge pressure is smaller than the reference discharge pressure, and when the suction temperature is greater than the reference suction temperature. And the second valve driving means in one of the case where the suction pressure is greater than the reference suction pressure, the discharge temperature is greater than the reference discharge temperature, and the discharge pressure is greater than the reference discharge pressure. Outputting an operation signal for sucking the refrigerant in the pipe into the refrigerant reservoir and the amount of refrigerant in the auxiliary refrigerant Refrigerant amount group variable air conditioner, characterized in that the case is less than the given amount of refrigerant made of a control unit for outputting a display signal to replenish the refrigerant in the secondary refrigerant tube as the display means. The air conditioner according to claim 1, wherein the display means is a liquid crystal display (LCD) panel provided on an outer surface of the indoor unit. An operation step system for circulating the refrigerant between the indoor unit and the outdoor unit by operating the compressor by turning on the power switch and the operation switch; The suction temperature which is the temperature of the refrigerant sucked into the compressor, the suction pressure which is the refrigerant pressure at the inlet of the compressor, the discharge temperature which is the temperature of the refrigerant discharged from the discharge port of the compressor, and the refrigerant pressure at the discharge port of the compressor Sensing temperature and pressure sensing steps; A suction temperature discrimination step of determining whether the suction temperature is equal to a preset reference suction temperature for comparison with the suction temperature; A suction pressure judging step of judging whether the suction pressure is equal to a reference suction pressure preset for comparison of the suction pressure when the suction temperature judging step determines that the suction temperature is equal to the reference suction temperature; A discharge temperature discrimination step for discriminating whether or not the discharge temperature is equal to a preset discharge temperature set for comparison of the discharge temperatures when the suction pressure discrimination step determines that the suction pressure is equal to the reference suction pressure; A discharge pressure judging step of judging whether the discharge pressure is equal to a reference discharge pressure preset for comparison of the discharge pressures when the discharge temperature judging step determines that the discharge temperature is equal to the reference discharge temperature; In the discharge pressure determination step, when it is determined that the discharge pressure is equal to the reference discharge pressure, it is determined that the amount of refrigerant in the pipe between the indoor unit and the outdoor unit is appropriate, and the refrigerant circulation control continues to purify the refrigerant between the indoor unit and the outdoor unit. A control method of a refrigerant amount variable air conditioner, characterized in that consisting of a steady state holding step of executing. 5. The method of claim 4, further comprising: a first refrigerant supplement / suction determination step of determining whether the suction temperature is greater than the reference suction temperature when the suction temperature discriminating step determines that the suction temperature is not equal to the reference suction temperature; 3-way valve between the pipe and the auxiliary refrigerant container to suck the refrigerant in the pipe into the auxiliary refrigerant container when the first refrigerant supplement / suction determination step determines that the suction temperature is not greater than the reference suction temperature. And a refrigerant suction step of sequentially turning on, and then proceeding to the suction temperature discrimination step. 6. The method of claim 5, wherein when the first refrigerant supplement / suction determination step determines that the suction temperature is greater than the reference suction temperature, the auxiliary refrigerant tank and the pipe are disposed between the auxiliary refrigerant container and the pipe to refill the refrigerant in the auxiliary refrigerant container. The control method of the refrigerant type variable air conditioner, characterized in that the refrigerant filling step for turning on the expansion valve proceeds to the suction temperature discrimination step. 5. The method of claim 4, further comprising: a second refrigerant supplement / suction discrimination step of discriminating whether the suction pressure is greater than the reference suction pressure when the suction pressure discriminating step determines that the suction pressure is not equal to the reference suction pressure; 3-way valve between the pipe and the auxiliary refrigerant container to suck the refrigerant in the pipe into the auxiliary refrigerant container when the second refrigerant supplement / suction determination step determines that the suction pressure is not greater than the reference suction pressure. And a refrigerant suction step of sequentially turning on, followed by the suction pressure discrimination step. 8. The method according to claim 7, wherein when the second refrigerant supplement / suction determination step determines that the suction pressure is greater than the reference suction pressure, the auxiliary refrigerant tank and the pipe are disposed between the auxiliary refrigerant container and the pipe to refill the refrigerant in the auxiliary refrigerant container. A control method of a refrigerant type variable air conditioner, characterized in that the refrigerant filling step of turning on the expansion valve proceeds to the suction pressure determining step. The method according to claim 4, further comprising: a third refrigerant supplement / suction determination step of determining whether the discharge temperature is greater than the reference discharge temperature when the discharge temperature determination step determines that the discharge temperature is not equal to the reference discharge temperature; 3-way valve between the pipe and the auxiliary refrigerant container to suck the refrigerant in the pipe into the auxiliary refrigerant container when the third refrigerant supplement / suction determination step determines that the discharge temperature is not greater than the reference discharge temperature. And a refrigerant suction step of sequentially turning on and then proceeding to the discharge temperature discrimination step. 10. The method according to claim 9, wherein when the third refrigerant supplement / suction determination step determines that the discharge temperature is greater than the reference discharge temperature, the refrigerant between the auxiliary refrigerant container and the pipe to replenish the refrigerant in the auxiliary refrigerant container into the pipe. The control method of the refrigerant type variable air conditioner, characterized in that the refrigerant refill step for turning on the expansion valve proceeds to the discharge temperature discrimination step. The method according to claim 4, further comprising: a fourth refrigerant supplement / suction determination step of discriminating whether or not the discharge pressure is greater than the reference discharge pressure when the discharge pressure judging step determines that the discharge pressure is not equal to the reference discharge pressure; A three-way valve between the pipe and the auxiliary refrigerant container to suck the refrigerant in the pipe into the auxiliary refrigerant container when the fourth refrigerant supplement / suction determination step determines that the discharge pressure is not greater than the reference discharge pressure; And a refrigerant suction step of sequentially turning on, and then proceeding to the discharge pressure discrimination step. 12. The method according to claim 11, wherein if it is determined in the fourth refrigerant supplement / suction determination step that the discharge pressure is greater than the standard discharge pressure, the refrigerant between the auxiliary refrigerant container and the pipe is to be replenished into the pipe. A control method of a refrigerant type variable air conditioner, characterized in that the refrigerant filling step for turning on the expansion valve proceeds to the discharge pressure determining step. ※ Note: The disclosure is based on the initial application.