KR20000033607A - Method of removing foreign material in filter of air conditioner - Google Patents

Abstract

PURPOSE: A method of removing foreign material in a filter of air conditioner is provided to achieve a reduced power consumption and enhanced cooling efficiency while allowing removal of foreign material by a dust removing cycle thus keeping the RPM of motor at normality. CONSTITUTION: A method comprises a first step of judging whether an operation switch is selected by a user, a second step of permitting a control unit to perform a normal cooling operation and judging whether a detected wind velocity applied from a sensor is lower than a reference velocity, a third step of permitting the control unit to control a blast fan motor to rotate the blast fan at a lowest speed if the detected velocity is lower than the reference, and judging whether the temperature of evaporator is lower than 0°C, a fourth step of permitting the control unit to judge whether a predetermined time has lapsed if the evaporator temperature is lower than 0°C, a fifth step permitting the control unit to stop a compressor if a predetermined time has lapsed, control the blast fan motor to rotate the blast fan at a maximum speed, and judge whether the temperature of the evaporator is higher than 0°C, a sixth step of permitting the control unit to judge whether a predetermined time has lapsed if the evaporator temperature is higher than 0°C, and a seventh step of permitting the control unit to operate the compressor to control the blast fan motor to operate in a selected air volume mode.

Description

A METHOD FOR REMOVING DUST ON THE FILTER OF AIR-CONDITIONER

The present invention relates to a method for controlling an air conditioner, and more particularly, foreign matters such as dust are attached to an evaporator and a filter installed in an indoor unit of an air conditioner, thereby increasing the rotation speed of the motor and reducing the discharge wind speed. The present invention relates to a method for removing foreign matter from a filter for an air conditioner to prevent performance degradation.

Generally, air conditioners are classified into window type air conditioners in which indoor units and outdoor units are integrally formed, and separate type air conditioners and package type air conditioners.

On the other hand, the separate air conditioner is composed of a large indoor unit and outdoor unit, the indoor unit is installed so that the evaporator that absorbs heat to supply the cold air to the indoor unit is installed, the outdoor unit to the compressor and discharge heat to compress the refrigerant to the outside An expansion valve is installed to reduce the pressure of the condenser and the refrigerant from the condenser and send it to the evaporator of the indoor unit.

Therefore, during the cooling operation through the air conditioner, if the compressor compresses the refrigerant to increase the pressure and temperature of the refrigerant gas to the saturation pressure, the condenser absorbs heat of the refrigerant gas of high temperature and high pressure using water or air. The refrigerant gas is condensed and liquefied.

In this way, the condensed and liquefied refrigerant gas has a low temperature and pressure due to the throttling action of the expansion valve, and the refrigerant gas evaporates in the evaporator to heat the indoor air to maintain a comfortable indoor temperature.

3 is a view for explaining the indoor unit of the separate air conditioner of the air conditioner to perform the above role, the air conditioner is a large outdoor unit for compressing the indoor unit 10 and the refrigerant supplying cold air to the room, and the discharge heat to the outside ( Not shown).

The front panel 12 is formed with an air inlet 11 for sucking the air in the room to the front of the indoor unit 10, the filter for preventing the intake of dust and foreign matter inside the air inlet (11) 13), the inside is equipped with an evaporator 20 for exchanging the suction air and a temperature sensor 14 for detecting the room temperature.

In addition, a cold air outlet 15 for discharging the air cooled in the indoor unit 10 to the inside of the front of the indoor unit 10, the remote control receiving unit 16 for receiving a signal transmitted through the remote control to one side; An operation state display lamp 17 for displaying the operation state in accordance with the remote control reception is configured.

Therefore, when the user intends to operate the air conditioner, a signal corresponding to the operation switch of the remote controller is transmitted to the remote controller receiver 16 of the indoor unit 10, and the remote controller receiver 16 outputs the operation signal to the reception controller. Normal operation of the air conditioner is performed, and the operation state display lamp 17 is turned on so that the user can recognize that the normal operation state of the air conditioner.

When the air conditioner is used as described above, foreign matters such as dust mixed in the suction air are attached to the filter 13 and the evaporator 20. Therefore, the user periodically removes the foreign matter attached to the filter 13 or the evaporator 20 over a period of time to prevent the cold air discharge and contamination of indoor air.

However, there is a problem that it is difficult for the user to regularly remove the foreign matter attached to the filter by setting a period of time, thereby increasing the adhesion of the foreign matter to the filter and the evaporator, thereby increasing the rotational speed of the motor and reducing the discharge wind speed. There is a problem that the power increase and cooling performance is lowered.

The present invention is to solve the above problems, by determining the foreign matter attached to the evaporator and the filter through the RPM detection sensor and the wind speed detection sensor to remove the foreign matter through the dust removal cycle (cycle), thereby reducing the normal rotational speed of the motor It is an object of the present invention to provide a method for removing foreign matter from a filter for an air conditioner which can maintain the power consumption and prevent the increase in power consumption, and also maintain the normal discharge wind speed.

The present invention provides a method for controlling an air conditioner, comprising: a first step of determining whether a driving switch is selected by a user; A second step of, if the operation switch is selected in the first step in the first step, the controller performs a normal cooling operation and determines whether the detected wind speed applied by the wind speed detection sensor is smaller than the reference wind speed; In the second step, if the detected wind speed is smaller than the reference wind speed, the controller controls the blower fan to rotate the blower fan to the minimum and determines whether the temperature of the evaporator applied through the evaporator temperature detection sensor is 0 ° C. or lower. ; A fourth step of determining whether a predetermined time has elapsed when the temperature of the evaporator is 0 ° C. or lower in the third step; A fifth step of, if the predetermined time has elapsed in the fourth step, the controller stops driving the compressor, controls the blower fan motor to rotate the blower fan to the maximum, and determines whether the temperature of the evaporator rises above 0 ° C; A sixth step of determining whether a predetermined time has elapsed if the temperature of the evaporator is increased to 0 ° C. or more in the fifth step; When the predetermined time has elapsed in the sixth step, the control unit includes a seventh step of driving the compressor and controlling the blower fan motor to rotate the blower fan normally according to the selected airflow mode to perform normal cooling operation.

1 is a block diagram schematically showing an internal configuration of a filter foreign matter removing device for an air conditioner according to the present invention;

2 is a flow chart showing a filter foreign matter removal method for an air conditioner according to the present invention;

3 is a view for explaining an indoor unit of a general split type air conditioner.

Explanation of symbols for the main parts of the drawings

13: filter 20: evaporator

100: operation switch 110: RPM detection sensor

120: wind speed detection sensor 130: evaporator temperature detection sensor

140: control unit 150: blowing fan motor

160: blower fan 170: compressor

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing the internal configuration of a filter foreign matter removal device for an air conditioner according to the present invention, the RPM detection sensor for detecting the RPM of the operation switch 100 and the blowing fan motor 150 for performing the cooling operation The control unit 140 includes a wind speed detection sensor 120 mounted at one side of the discharge port of the indoor unit 10 and an evaporator temperature detection sensor 130 that detects a temperature of the evaporator 20, and a temperature of the evaporator 20. Is connected to.

In addition, the blower fan motor 150 for rotating the blower fan 160 and the compressor 170 for compressing the refrigerant are respectively connected to be controlled by the control unit 140.

Next will be described in detail with reference to Figure 3 the foreign matter filter removal method for an air conditioner according to the present invention configured as described above.

2 is a flowchart illustrating a method for removing foreign matter from a filter for an air conditioner according to the present invention. When the user selects the operation switch 100, the controller 140 controls the operation switch 100 through an ON signal applied from the operation switch 100. In step 101, it is determined whether () is selected.

Therefore, when the operation switch 100 is selected by the user, the control unit 140 performs normal cooling operation by controlling various functions of the air conditioner (102), the wind speed detection sensor 120 for detecting the discharge wind speed of the cold wind In operation 103, it is determined whether the detected wind speed is smaller than the reference wind speed according to the wind volume mode selected by the user.

If the detected wind speed is smaller than the reference wind speed according to the user's selection mode, the controller 140 controls the blowing fan motor 150 to maintain the rotational speed of the blowing fan 160 to the minimum (104), the evaporator 20 It is determined whether the temperature of the evaporator 20 applied through the evaporator temperature detection sensor 130 for detecting a temperature of 0 ° C. or less (105).

When the temperature of the evaporator 20 is 0 ° C. or less, the controller 140 counts a predetermined time at which the freezing of the condensate in the evaporator 20 does not occur and determines whether the predetermined time has elapsed (106). After a predetermined time has passed, the controller 140 stops driving the compressor 170 (107), and controls the blower fan motor 150 to maximize the rotation speed of the blower fan 160. And remove the foreign matter attached to the evaporator 20 (108), it is determined whether the temperature of the evaporator 20 applied through the evaporator temperature detection sensor 130 rises above 0 ℃ (109).

When the temperature of the evaporator 20 applied through the evaporator temperature detection sensor 130 has risen to 0 ° C. or more, the controller 140 again counts a predetermined time in which condensate frozen in the evaporator 20 melts, and a predetermined time is increased. When the elapsed (110), the control unit 140 drives the compressor 170 and controls the blowing fan motor 150 to rotate the blowing fan 160 in accordance with the air flow mode selected by the user, thereby ensuring normal operation of the air conditioner. Cooling operation is performed (111 to 113).

As described above, the present invention removes the foreign matter through the dust removal cycle by determining the adhesion state of the foreign matter to the evaporator and the filter through the RPM detection sensor and the wind speed detection sensor, thereby maintaining the normal rotational speed of the motor to prevent an increase in power consumption. In addition, it is possible to maintain a normal discharge wind speed to prevent the cooling performance deterioration at the same time.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. .

Therefore, the technical protection scope of the present invention should be defined only by the appended claims.

Claims (1)

A method of controlling an air conditioner, comprising: a first step (101) of determining whether a driving switch (100) is selected by a user; If the operation switch 100 is selected in the first step in the first step, the control unit 140 performs normal cooling operation and determines whether the detected wind speed applied through the wind speed detection sensor 120 is smaller than the reference wind speed. Second steps 102-103; In the second step, if the detected wind speed is smaller than the reference wind speed, the controller 140 controls the blowing fan motor 150 to rotate the blowing fan 160 to the minimum and is applied through the evaporator temperature detection sensor 130. A third step 104 to 105 for determining whether the temperature of 20) is 0 ° C. or lower; A fourth step 106 of determining whether a predetermined time has elapsed when the temperature of the evaporator 20 is 0 ° C. or less in the third step; When the predetermined time has elapsed in the fourth step, the controller 140 stops the driving of the compressor 170, controls the blowing fan motor 150 to rotate the blowing fan 160 to the maximum, and the temperature of the evaporator 20 is increased. Fifth steps 107 to 109 for determining whether the temperature rises above 0 ° C; If the temperature of the evaporator 20 has risen above 0 ° C. in the fifth step, the controller 140 determines whether a predetermined time has elapsed again; When the predetermined time has elapsed in the sixth step, the controller 140 drives the compressor 170 and controls the blower fan motor 150 to rotate the blower fan 160 in accordance with the selected airflow mode to perform normal cooling operation. The foreign matter filter foreign matter removal method comprising the seventh step (111 to 113).