KR20140140850A - Air conditioner system and method for controlling therefor - Google Patents

Abstract

The present invention relates to an air conditioner system and a control method thereof. More particularly, the present invention relates to an air conditioner system and a control method thereof. Measuring a first current indoor heat exchanger temperature when a first predetermined time elapses after starting the compressor; Determining whether the valve is firstly clogged based on the indoor air temperature immediately before starting the compressor, the indoor heat exchanger temperature immediately before starting the compressor, and the first current indoor heat exchanger temperature; And stopping the driving of the compressor when the first clogging of the valve is determined.

Description

TECHNICAL FIELD [0001] The present invention relates to an air conditioner system and a control method thereof,

An air conditioning system and a control method thereof.

A general air conditioner is a device used for indoor cooling or heating purposes, and circulates refrigerant between indoor and outdoor units to absorb ambient heat when a refrigerant in a liquid state is vaporized, and emits heat when liquefied To perform a cooling or heating operation. In an ordinary air conditioner, one indoor unit is installed in one outdoor unit.

On the other hand, a compressor applied to an air conditioner is a core component of an air conditioner. If a compressor malfunctions, it can not operate the product and there is a risk of an explosion accident due to an increase in internal pressure.

One aspect of the air conditioner system and the control method thereof is to provide an air conditioner system and a control method thereof for diagnosing clogging of a valve so that the refrigerant flows smoothly to protect the compressor.

According to another aspect of the present invention, there is provided a method of controlling an air conditioner, comprising: measuring indoor air temperature immediately before starting a compressor and indoor heat exchanger temperature immediately before starting a compressor when a cooling operation request is generated; Measuring a first current indoor heat exchanger temperature when a first predetermined time elapses after starting the compressor; Determining whether the valve is firstly blocked based on the indoor air temperature immediately before starting the compressor, the indoor heat exchanger temperature immediately before starting the compressor, and the first current indoor heat exchanger temperature; And stopping the operation of the compressor when it is determined that the valve is firstly clogged.

The step of determining whether or not the first clogging of the valve determines whether or not the first clogging of the valve is established by comparing the difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first present indoor heat exchanger with the first temperature reference value, And comparing the difference of the temperature of the heat exchanger with the second temperature reference value. If the difference is less than or equal to the first temperature reference value and the second temperature reference value, it may be determined that the valve is first clogged.

When the difference between the temperature of the indoor heat exchanger immediately before the compressor starts and the temperature of the first present indoor heat exchanger is less than or equal to the first reference temperature and the difference between the indoor air temperature immediately before the compressor starts and the first present indoor heat exchanger temperature is less than the second temperature reference value Opening the valve according to the preset value, before the step of stopping the driving of the compressor, after confirming whether or not the valve is first clogged; Returning to a state before opening the valve according to a predetermined value when a second predetermined time elapses after the valve is opened; The difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first current indoor heat exchanger and the difference between the indoor air temperature just before starting the compressor and the first present indoor heat exchanger temperature continuously for the first test time are set as a first temperature reference value and a second temperature Comparing with a reference value; The difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first present indoor heat exchanger is less than or equal to the first reference temperature and the difference between the indoor air temperature just before the compressor starts and the first present indoor heat exchanger temperature is the second temperature And finally determining whether the valve is first clogged if it is less than or equal to the reference value.

Measuring the indoor air temperature immediately before the compressor restart and the indoor heat exchanger temperature immediately before the compressor restart after the step of stopping the operation of the compressor; Restarting the compressor; Measuring a second current indoor heat exchanger temperature when a predetermined third time has elapsed after restarting the compressor; The difference between the temperature of the indoor heat exchange immediately before the compressor restarting and the temperature difference of the second current indoor heat exchanger and the difference between the indoor air temperature just before the compressor restart and the second current indoor heat exchanger temperature are compared with the first temperature reference value and the second temperature reference value, Determining whether the vehicle is blocked or not; And stopping the operation of the compressor when it is determined that the valve is secondly clogged.

Further, after the step of determining whether the valve is secondly clogged, opening the valve according to a predetermined value before stopping the operation of the compressor; The difference between the temperature of the indoor heat exchanger immediately before the compressor restart and the temperature of the second current indoor heat exchanger continuously during the second test time and the difference between the indoor air temperature immediately before the compressor restart and the second current indoor heat exchanger temperature are set to the first temperature reference value and the second temperature Comparing with a reference value; As a result of the comparison, if the difference between the temperature of the indoor heat exchanger immediately before the compressor restarts and the temperature of the second present indoor heat exchanger is less than or equal to the first reference temperature value and the difference between the room air temperature immediately before the compressor restarts and the second current indoor heat exchanger temperature becomes the second temperature reference value And if it is smaller than or equal to the predetermined value, final clogging of the valve may be finally determined.

An air conditioning system according to an aspect of the disclosed invention includes: a compressor; An indoor air temperature sensor for measuring an indoor air temperature; An indoor heat exchanger temperature sensor for measuring the temperature of the indoor heat exchanger; A valve for controlling the flow of the fluid; And a control unit for controlling the operation of the compressor by comparing the indoor air temperature measured by the indoor air temperature sensor and the indoor heat exchanger temperature measured by the indoor heat exchanger temperature sensor with the valve clogging reference value to determine clogging of the valve, ; ≪ / RTI >

The controller may include a valve clog check unit for determining whether the valve is clogged by comparing the indoor air temperature measured by the indoor air temperature sensor, the indoor heat exchanger temperature sensor, and the indoor heat exchanger temperature with a valve clogging reference value; A valve control unit for controlling the degree of opening of the valve according to a result of the determination by the valve clogging check unit; And a compressor controller for driving the compressor or stopping the compressor according to a result of the determination by the valve clogging checker.

The valve clogging check unit compares the difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the present indoor heat exchanger after the compressor is started with the first temperature reference value and the difference between the indoor air temperature just before starting the compressor and the present indoor heat exchanger temperature Is compared with the second temperature reference value, and if the difference is smaller than or equal to the first temperature reference value and the second temperature reference value, it can be determined that the valve is clogged.

According to one aspect of the air conditioning system and the control method thereof, the clogging of the valve is estimated and measured by measuring and analyzing the indoor air temperature and the indoor heat exchanger temperature, the valve is tested according to the estimation result to determine the clogging of the valve, It is possible to expect an effect that a failure due to the continuous operation of the compressor can be prevented in advance in the abnormal refrigerant flow state.

1 is a view showing a structure of an air conditioner.
2 is a view showing a configuration of an air conditioning system.
FIG. 3 is a detailed view of the configuration of the control unit of FIG. 2. FIG.
4 is a flowchart for explaining an air conditioner control method.
FIG. 5 is a flowchart for explaining the first test procedure of FIG. 4 in detail.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In this specification, the terms first, second, etc. are used to distinguish one element from another, and the element is not limited by the terms.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a structure of an air conditioner.

As shown in Fig. 1, the air conditioner 1 may include an outdoor unit 10 and an indoor unit 20. As shown in Fig. At this time, the outdoor unit 10 and the indoor unit 20 can be connected to each other to transmit and receive power and communication signals to each other.

The outdoor unit 10 includes a compressor 11 for compressing the refrigerant into a gas state at a high temperature and a high pressure, a four-way valve 12 for regulating the flow direction of the high-temperature high-pressure gas refrigerant compressed in the compressor 11, An outdoor heat exchanger 13 for receiving the compressed high temperature and high pressure gas refrigerant and exchanging heat with outdoor air and an outdoor fan for forcibly blowing outdoor air by an outdoor fan motor 15 so that heat is exchanged in the outdoor heat exchanger 13 14), and an electronic expansion valve (17) for expanding the refrigerant heat-exchanged under pressure while controlling the refrigerant flow rate. At this time, the electronic expansion valve (EEV) 17 can control the superheating degree and the supercooling degree of the refrigerant according to the opening degree. An accumulator (16) for converting the refrigerant flowing into the compressor (11) into a gas in a fully gaseous state may be provided on the suction side of the compressor (11).

The indoor unit 20 includes an indoor heat exchanger 21 for receiving refrigerant and exchanging heat with room air, an indoor fan for forcedly blowing indoor air by an indoor fan motor 23 for heat exchange in the indoor heat exchanger 21, And may include a fan 22. In addition, among the piping connected to the indoor heat exchanger 21, an inlet-side pipe through which the refrigerant is sucked in the cooling operation is provided with an electronic expansion valve 24 for expanding the refrigerant, an indoor heat exchanger A base temperature sensor 26 may be installed. In the piping connected to the indoor heat exchanger (21), a refrigerant control valve (25) for controlling the flow of refrigerant may be installed in the outlet pipe through which the refrigerant is discharged during the cooling operation.

FIG. 2 is a view showing a configuration of an air conditioning system, and FIG. 3 is a detailed view of the configuration of the control unit of FIG. 2. Referring to FIG.

2, the air conditioning system 100 may include an indoor air temperature sensor 110, an indoor heat exchanger temperature sensor 120, a compressor 130, a valve 140, and a controller 150 . At this time, the indoor air temperature sensor 110, the indoor heat exchanger temperature sensor 120, and the control unit 150 may be provided at the indoor unit side.

More specifically, the indoor air temperature sensor 110 can measure the indoor air temperature.

The indoor heat exchanger temperature sensor 120 can measure the temperature of the indoor heat exchanger. Here, measuring the temperature of the indoor heat exchanger may mean measuring the temperature of the indoor heat exchanger and the surrounding configuration related to the indoor heat exchanger.

The compressor 130 is configured to compress or pressurize the refrigerant. At this time, the compressor 130 can be driven by the engine via a poly-V belt or multiple V-belts, and the refrigerant flowing in the evaporator is sucked into the compressor in a low-temperature low-pressure gas state, And can be transferred to the condenser in a gaseous state.

The valve 140 is a structure for controlling the flow of the fluid, and may mean a movable mechanism that can open and close the passage to pass, block, or control the fluid.

At this time, the valve 140 may be an electronic expansion valve provided on the indoor unit side, but it is not limited thereto, and it may be an on or off valve applicable to the air conditioner. For example, a solenoid valve type valve that is applied to an air conditioner system may be possible. The electronic expansion valve may decompress the medium-temperature high-pressure liquid refrigerant discharged from the outdoor unit (10 in FIG. 1) to a low-temperature low-pressure liquid refrigerant. In addition, the solenoid valve can be adapted to stop the liquefied refrigerant from leaving the cooler or radiator with cold or hot water by the evaporator when the temperature is lowered.

The control unit 150 compares the indoor air temperature measured by the indoor air temperature sensor 110 and the indoor heat exchanger temperature measured by the indoor heat exchanger temperature sensor 120 with the valve clogging determination reference value, So that the operation of the compressor 130 can be controlled. In this case, the valve clogging determination reference value is defined as a temperature reference value for determining whether the valve provided in the air conditioning system 100 is in a normal state.

3, the control unit 150 may include a valve clogging check unit 151, a valve control unit 153, and a compressor control unit 155. As shown in FIG.

The valve clogging check unit 151 compares the indoor air temperature measured by the indoor air temperature sensor 110 and the indoor heat exchanger temperature sensor 120 and the indoor heat exchanger temperature with the valve clogging determination reference value, Can be determined.

The valve clogging check unit 151 also compares the difference between the temperature of the indoor heat exchanger immediately before the compressor start and the temperature of the present indoor heat exchanger after the compressor is started to the first temperature reference value and the indoor air temperature immediately before the compressor starts and the current indoor heat exchanger temperature If the difference is less than or equal to the first temperature reference value and the second temperature reference value, it can be determined that the valve is clogged. That is, the valve clogging check unit 151 compares the indoor air temperature before starting the compressor 130 with the indoor heat exchanger temperature and the indoor heat exchanger temperature after the compressor 130 is started. If the difference between the indoor air temperature and the indoor heat exchanger temperature does not exceed the reference temperature, Is blocked.

The valve control unit 153 may control the opening degree of the valve 140 according to the determination result of the valve clogging check unit 151. For example, when the clogging of the valve is estimated, the valve control unit 153 performs various stages of testing while driving the valve 140 to the maximum opening degree, thereby determining the clogging of the valve.

The compressor control unit 155 may stop driving the compressor 130 according to a determination result of the compressor 130 or the valve clogging check unit 151. [

FIG. 4 is a flowchart for explaining an air conditioner control method, and FIG. 5 is a flowchart for explaining a first test procedure of FIG.

4, the air conditioning system 100 can measure the indoor air temperature Tr1 immediately before starting the compressor and the indoor heat exchanger temperature Te1 immediately before starting the compressor (S101) (S103).

Next, the air conditioning system 100 can measure the first current indoor heat exchanger temperature Te2 (S105, S107) when a predetermined first time has elapsed after the compressor is started. In this case, the first time means an elapsed time for checking the clogging of the valve after the compressor is driven. For example, it may be three minutes after the compressor is driven. Also, the first current indoor heat exchange air temperature can be defined as the temperature of the indoor heat exchanger at a point of time after the first time has passed since the compressor is driven.

Next, the air conditioning system 100 performs the primary clogging of the valve 140 based on the indoor air temperature Tr1 immediately before the compressor starts, the indoor heat exchanger temperature immediately before the compressor starts (Te1), and the first current indoor heat exchanger temperature Te2 Can be determined.

More specifically, the air conditioning system 100 compares the difference between the temperature of the indoor heat exchanger (Te1) immediately before the compressor starts and the temperature of the first current indoor heat exchanger (Te2) with the first temperature reference value, Tr1) and the first current indoor heat exchange temperature (Te2) can be compared with the second temperature reference value (S109).

As a result of the comparison, if the difference is equal to or less than the first temperature reference value and the second temperature reference value, the first clogging of the valve 140 can be determined. At this time, the valve 140 may be an electronic expansion valve, but it is not limited thereto and may be an on or off valve applicable to an air conditioning system. For example, a solenoid valve type valve applicable to the air conditioning system 100 may be used.

Thereafter, the air conditioning system 100 may perform the primary test before final determination of the primary clogging of the valve 140. After performing the primary test, the air conditioner system 100 re-executes the step S109 continuously for the first test time, 140) may be finally determined (S111, S113).

More specifically, as a result of the comparison in step S109, it is determined that the difference between the temperature Tr1 immediately before starting the compressor and the first current indoor heat exchanger temperature Te2 is equal to or less than the first reference temperature value, 5, the air conditioning system 100 is connected to the valve 140 (for example, an electronic control unit) such that the difference between the first temperature Tr1 and the first current indoor heat exchange air temperature Te2 is less than or equal to the second temperature reference value. The expansion valve) can be opened according to the preset value (S201). At this time, the degree of opening of the valve 140 is a value set by the operator and should be set to be larger than the degree of opening of the valve 140 before the first test. For example, the valve 140 can be set to open to the maximum.

Next, the air conditioning system 100 may return to the state before opening the valve 140 according to the preset value (S203, S205) when a predetermined second time elapses after the valve 140 is opened.

Next, during the first test time, the difference between the immediately-before-compressor-immediately-opened indoor heat exchanger temperature Te1 and the first present indoor heat exchanger temperature Te2, the indoor air temperature Tr1 immediately before the compressor starts and the first present indoor heat exchanger temperature (Te2) can be compared with the first temperature reference value and the second temperature reference value, respectively.

As a result of comparison, if the difference between the temperature Tr1 immediately before starting the compressor operation and the first current indoor heat exchanger temperature Te2 is equal to or smaller than the first reference temperature value, the indoor air temperature Tr1 immediately before the compressor starts, If the difference in the heat exchange air temperature Te2 is less than or equal to the second temperature reference value, it is possible to make a final judgment on the first clogging of the valve 140 (S113).

If it is determined that the valve 140 is first clogged, the air conditioning system 100 can stop driving the compressor 130 (S115). At this time, the air conditioning system 100 can reset the controller 150 (e.g., a microcomputer).

That is, when the clogging of the valve 140 is estimated by checking the indoor air temperature and the indoor heat exchanger temperature through step S109, the air conditioning system 100 opens the valve 140 to the maximum, The air temperature and the indoor heat exchanger temperature are checked to determine the clogging of the valve. However, the present invention is not limited to this, and steps S111 and S113 may be omitted.

Next, the air conditioning system 100 can measure the indoor air temperature Trl 'immediately before the compressor restarting and the indoor heat exchanger temperature Te1' just before the compressor restarting (S117).

Next, the air conditioning system 100 can restart the compressor 130 (S119). At this time, the air conditioner system 100 can restart the compressor 130 after a predetermined time has elapsed since the compressor driving stopped.

Next, when a third predetermined time elapses after the compressor 130 is restarted, the air conditioning system 100 can measure the second current indoor heat exchanger temperature Te2 '(S121).

Next, the air conditioning system 100 calculates the difference between the immediately preceding indoor heat exchanger temperature Te1 'and the second current indoor heat exchanger temperature Te2', the indoor air temperature Tr1 'just before the compressor restart, The difference in temperature Te2 'may be compared with the first temperature reference value and the second temperature reference value to determine whether the valve 140 is secondarily blocked (S123).

As a result of the check in step S123, it is determined that the difference between the indoor heat exchanger temperature Te1 'immediately before the compressor restarting and the second current indoor heat exchanger temperature Te2' is smaller than or equal to the first temperature reference value and the indoor air temperature Tr1 ' And the second current indoor heat exchange air temperature Te2 'is less than or equal to the second temperature reference value, the air conditioning system 100 may open the valve 140 according to a preset value (S125).

Next, the air conditioning system 100 determines the difference between the immediately preceding indoor heat exchanger temperature Te1 'and the second current indoor heat exchanger temperature Te2' continuously and the indoor air temperature Tr1 'immediately before the compressor restarting during the second test time, ) And the second current indoor heat exchange air temperature Te2 'can be compared with the first temperature reference value and the second temperature reference value, respectively (S127).

As a result of comparison, if the difference between the indoor heat exchanger temperature (Te1 ') immediately before the compressor restart and the second current indoor heat exchanger temperature (Te2') is less than or equal to the first reference temperature value and the indoor air temperature (Tr1 ' 2 When the difference in the present indoor heat exchange air temperature Te2 'is less than or equal to the second temperature reference value, it can be finally determined that the valve 140 is closed secondarily.

At this time, the first test time may be longer than the second test time. This is because the second test is performed after the first test, which prevents the compressor 130 from being overloaded because the test time is long and the compressor 130 is driven for a long time compared to the first test time .

Next, when it is determined that the valve 140 is secondarily closed, the air conditioning system 100 can stop the operation of the compressor (S129). At this time, the air conditioning system 100 can stop the compressor operation and output an error indication. On the other hand, stopping the operation of the compressor in step S129 means stopping the operation of the compressor completely, and stopping the operation of the compressor in step S115 may indicate a temporary stop before restarting the compressor.

The valve clogging of the air conditioner can be self-detected through the above-described air conditioner control method. Accordingly, it is possible to prevent the failure of the compressor due to the continuous operation of the abnormal refrigeration cycle. Further, it is possible to detect and respond to a continuous bodily sensation failure that may occur due to a lack of response to a cooling load at an early stage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: air conditioner 10: outdoor unit
11, 130: compressor 12: four-way valve
13: outdoor heat exchanger 14: outdoor fan
15: outdoor fan motor 16: accumulator
17, 24: electronic expansion valve 20: indoor unit
21: indoor heat exchanger 22: indoor fan
23: indoor fan motor 25: refrigerant control valve
26: indoor heat exchanger temperature sensor 100: air conditioning system
110: indoor air temperature sensor 120: indoor heat exchanger temperature sensor
140: valve 150:
151: Valve clogging check unit 153: Valve control unit
155: compressor control section

Claims (11)

Measuring the indoor air temperature immediately before starting the compressor and the indoor heat exchanger temperature immediately before starting the compressor when the cooling operation request is generated;
Measuring a first current indoor heat exchanger temperature when a first predetermined time elapses after starting the compressor;
Determining whether the valve is firstly blocked based on the indoor air temperature immediately before starting the compressor, the indoor heat exchanger temperature immediately before starting the compressor, and the first current indoor heat exchanger temperature; And
Stopping the operation of the compressor when the first clogging of the valve is determined;
Lt; / RTI >
The method according to claim 1,
Wherein the step of determining whether the valve is first clogged comprises:
The difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature difference of the first present indoor heat exchanger is compared with the first temperature reference value and the difference between the indoor air temperature just before starting the compressor and the first present indoor heat exchanger temperature is compared with the second temperature reference value, And determining that the valve is first clogged if the difference is less than or equal to the first temperature reference value and the second temperature reference value.
The method of claim 2,
Wherein the difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first present indoor heat exchanger is less than or equal to the first reference temperature and the difference between the indoor air temperature immediately before starting the compressor and the first indoor heat exchanger is less than the second temperature reference value In the same case,
After the step of confirming whether or not the valve is first clogged, before the step of stopping the driving of the compressor,
Opening the valve according to a preset value;
Returning to a state before opening the valve according to a predetermined value when a second predetermined time elapses after the valve is opened;
The difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first current indoor heat exchanger and the difference between the indoor air temperature just before starting the compressor and the first present indoor heat exchanger temperature continuously for the first test time are set as a first temperature reference value and a second temperature Comparing with a reference value; And
As a result of the comparison, if the difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the first present indoor heat exchanger is less than or equal to the first reference temperature value and the difference between the indoor air temperature just before starting the compressor and the first present indoor heat exchanger temperature becomes the second temperature reference value The final clogging of the valve;
Lt; / RTI >
The method of claim 3,
After the step of stopping the operation of the compressor,
Measuring the indoor air temperature immediately before the compressor restart and the indoor heat exchanger temperature just before the compressor restart;
Restarting the compressor;
Measuring a second current indoor heat exchanger temperature when a predetermined third time has elapsed after restarting the compressor;
The difference between the temperature of the indoor heat exchange immediately before the compressor restarting and the temperature difference of the second current indoor heat exchanger and the difference between the indoor air temperature just before the compressor restart and the second current indoor heat exchanger temperature are compared with the first temperature reference value and the second temperature reference value, Determining whether the vehicle is blocked or not; And
Stopping the operation of the compressor when it is determined that the valve is secondly clogged;
Lt; / RTI >
The method of claim 4,
The method of claim 1, further comprising: after determining whether the valve is secondly clogged,
Opening the valve according to a preset value;
The difference between the temperature of the indoor heat exchanger immediately before the compressor restart and the temperature of the second current indoor heat exchanger continuously during the second test time and the difference between the indoor air temperature immediately before the compressor restart and the second current indoor heat exchanger temperature are set to the first temperature reference value and the second temperature Comparing with a reference value; And
As a result of the comparison, if the difference between the temperature of the indoor heat exchanger immediately before the compressor restarts and the temperature of the second present indoor heat exchanger is less than or equal to the first reference temperature value and the difference between the room air temperature immediately before the compressor restarts and the second current indoor heat exchanger temperature becomes the second temperature reference value If the pressure is less than or equal to the predetermined pressure, final clogging of the valve;
Lt; / RTI >
The method of claim 5,
Wherein the first test time is longer than the second test time.
The method according to claim 1,
Wherein the valve is an electronic expansion valve or a solenoid valve.
compressor;
An indoor air temperature sensor for measuring an indoor air temperature;
An indoor heat exchanger temperature sensor for measuring the temperature of the indoor heat exchanger;
A valve for controlling the flow of the fluid; And
A controller for comparing the indoor air temperature measured by the indoor air temperature sensor and the indoor heat exchanger temperature measured by the indoor heat exchanger temperature sensor with a valve clogging reference value to determine clogging of the valve and controlling the operation of the compressor;
.
The method of claim 8,
Wherein,
A valve clogging check unit for determining whether the valve is clogged by comparing the indoor air temperature measured by the indoor air temperature sensor, the indoor heat exchanger temperature sensor, and the indoor heat exchanger temperature with a valve clogging reference value;
A valve control unit for controlling the degree of opening of the valve according to a result of the determination by the valve clogging check unit; And
A compressor controller for driving the compressor or stopping the compressor according to a result of the determination by the valve clogging checker;
.
The method of claim 9,
The valve clog-
The difference between the temperature of the indoor heat exchanger immediately before starting the compressor and the temperature of the present indoor heat exchanger after the compressor is started is compared with the first temperature reference value and the difference between the indoor air temperature immediately before the compressor starts and the present indoor heat exchanger temperature after the compressor is started is compared with the second temperature reference value And determines that the valve is clogged if the difference is equal to or less than the first temperature reference value and the second temperature reference value.
The method of claim 8,
Wherein the valve is an electronic expansion valve or a solenoid valve.

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