KR20100019163A - Air condition and the controlling method - Google Patents

Abstract

The air conditioner of the present invention and the control method thereof is such that the operation time and standby time for the low noise operation at night and the rotational speed of the outdoor fan vary according to the outdoor temperature and the operating high pressure of the compressor. And an input unit for inputting a release command, a driving unit for driving a compressor and an outdoor fan, a measuring unit for measuring the first operation high pressure and outdoor temperature of the compressor, and the operation command for the night low noise operation during cooling or heating operation. If the operation time and the operation waiting time for the night low noise operation is changed according to the outdoor temperature, if the night low noise operation is executed, maintain the first rotational speed of the outdoor fan according to the first operating high pressure, or An air tank including a control unit for controlling the drive unit to vary the first rotational speed to a second rotational speed It provides a group.

Description

Air conditioner and control method

The present invention relates to an air conditioner and a control method thereof, and more particularly, to an air conditioner in which an operation time and standby time for a low noise operation at night and a rotational speed of an outdoor fan vary according to an outdoor temperature and an operating high pressure of a compressor. The control method is related.

In general, an air conditioner is a home appliance for maintaining indoor air in a state most suitable for use and purpose. For example, in summer, the room is cooled to a cool state, in winter, the room is heated to a warm state, and also the humidity of the room, and the air in the room to a clean state of clean. As life convenience products such as air conditioners are gradually expanded and used, consumers are demanding high energy use efficiency, performance improvement and convenience products.

Such an air conditioner includes a separate air conditioner in which an indoor unit and an outdoor unit are separately separated, an integrated air conditioner in which the indoor unit and the outdoor unit are combined into one device, a wall-mounted air conditioner and a frame type air conditioner configured to be mounted on a wall, and a living room. A slim air conditioner configured to stand, a single air conditioner configured to be used in a small place such as a house, and a large air capacity configured to be used in a company or a restaurant. It is divided into an air conditioner and a multi type air conditioner having a capacity capable of sufficiently driving a plurality of indoor units.

An object of the present invention relates to an air conditioner and a method of controlling the same, wherein the operation time and standby time for the low noise operation at night and the rotational speed of the outdoor fan vary according to the outdoor temperature and the operating high pressure of the compressor.

An air conditioner according to the present invention includes an input unit for inputting a driving command and a release command for a low noise operation at night, a driving unit for driving a compressor and an outdoor fan, a measuring unit for cooling the first operating high pressure and outdoor temperature of the compressor, and cooling or During the heating operation, when the operation command for the night low noise operation is input, the operation time and the operation waiting time for the night low noise operation are changed according to the outdoor temperature, and when the night low noise operation is executed, the first operation high pressure is applied. The control unit may include a control unit configured to maintain the first rotational speed of the outdoor fan or to control the driving unit to vary the first rotational speed to a second rotational speed.

In addition, the control method of the air conditioner according to the present invention, the step of measuring the outdoor temperature at a predetermined time interval during the cooling or heating operation, inputting a driving command for the night low noise operation, the night low noise according to the outdoor temperature Varying an operating time and a standby time, and after the waiting time has elapsed, when the night low noise operation time is performed, an outdoor fan operates at a first rotational speed and measures a first operating high pressure of the compressor; 1 comparing the set high pressure to determine whether the outdoor fan is variable with respect to the first rotational speed and according to the determination result, maintains the first rotational speed of the outdoor fan or the first rotational speed of the outdoor fan And varying the speed at a second rotational speed to continue the nighttime low noise operation.

The air conditioner and the control method of the present invention measure the outdoor temperature before the night low noise operation time, vary the operation time and standby time for the night low noise operation according to the point of time when the outdoor temperature is the highest, and execute the night low noise operation By varying the rotational speed of the outdoor fan in accordance with the high pressure of the operation of the compressor, by varying the flow rate in accordance with the load capacity at night there is less noise at night and has the effect of providing a comfortable indoor air to the user during cooling or heating operation.

An air conditioner and a control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a building equipped with an air conditioner according to a first embodiment of the present invention.

Although the air conditioner of the present invention has been described as a multi-type air conditioner in FIG.

Referring to FIG. 1, the air conditioner is connected to at least one indoor unit 11, 12, 13, 14, indoor units 11, 12, 13, 14 installed indoors, and includes an outdoor unit 21, 22. .

Here, the outdoor unit (21, 22) and the indoor unit (11, 12, 13, 14) is connected through the refrigerant pipe (P), so that the refrigerant between the outdoor unit (21, 22) and the indoor unit (11, 12, 13, 14) Depending on the flow, cooling or heating operation is performed.

In this case, the air conditioner may further include a central controller (not shown) connected to the outdoor units 21 and 22 and the indoor units 11, 12, 13, and 14 to monitor and control an operating state.

In addition, a distributor (not shown) may be included between the outdoor units 21 and 22 and the indoor units 11, 12, 13, and 14.

The indoor units 11, 12, 13, 14 and the outdoor units 21, 22 transmit and receive mutual control commands and data according to a predetermined communication method.

Here, at least one indoor unit (11, 12, 13, 14) may be provided in one room, the outdoor unit (21, 22) by the request of at least one of the indoor unit (11, 12, 13, 14) Driven. When a plurality of indoor units are provided in one room, a plurality of indoor units installed in one room may be group controlled or individually controlled through the central controller or outdoor units 21 and 22.

Here, the outdoor units 21 and 22 may have a variable number of air conditioners installed in accordance with the number of air conditioners and the capacity of the compressor according to the number of operation units of the indoor units 11, 12, 13, and 14.

That is, although the outdoor units 21 and 22 are described as two, a plurality of outdoor units may be applied.

2 is a block diagram showing an air conditioner according to a first embodiment of the present invention.

FIG. 2 briefly illustrates and describes the multi-type air conditioner described in FIG. 1, but is not limited thereto.

Referring to FIG. 2, the air conditioner includes at least one indoor unit 100, 105, 109, and an outdoor unit 125 connected to at least one indoor unit 100, 105, 109.

Although an outdoor unit has been described in an embodiment of the present invention, a plurality of outdoor units may be used.

Here, the at least one indoor unit (100, 105, 109) and the outdoor unit 125 is connected via a refrigerant pipe (not shown), the outdoor unit 125 is at least one of the at least one indoor unit (100, 105, 109) Driven by the demand of the, as the cooling and heating capacity required in the at least one indoor unit (100, 105, 109) increases the number of operating units of the outdoor unit 125 and the number of operating units of the compressor 112 installed in the outdoor unit 125 Is increased. Although the compressor 112 is shown as one, at least one compressor may be used.

Here, at least one indoor unit (100, 105, 109) is an indoor heat exchanger (102) for heat exchange between the refrigerant and the indoor air, and an indoor fan (103) installed near the indoor heat exchanger (102) for circulating indoor air; , An indoor electromagnetic expansion valve 104 for expanding the refrigerant flowing into the indoor heat exchanger 120 when cooling.

The outdoor unit 125 includes an accumulator (not shown) for extracting only gas refrigerant among refrigerants supplied from the at least one indoor unit (100, 105, 109), and a compressor for receiving and compressing the gas refrigerant extracted from the accumulator (not shown). And a four-way valve 110 connected to the compressor 112 to select a flow path of the compressed refrigerant, an outdoor heat exchanger 120 to heat-exchange the outdoor air with the refrigerant supplied from the four-way valve 110. Installed in the heat exchanger 102 includes an outdoor fan 122 for circulating the outdoor air.

Here, the outdoor unit 124 includes at least one of an inverter compressor and a constant speed compressor, wherein the inverter compressor is a compressor that can vary the compression capacity of the refrigerant, the constant speed compressor is a compressor having a constant compression capacity of the refrigerant.

On the other hand, an oil separator (not shown) is installed in the pipe connecting the compressor 112 and the four-way valve 110, the oil separator may be connected to the suction side of the compressor (112).

The refrigerant pipe guiding the refrigerant discharged from the outdoor heat exchanger (120) to the indoor heat exchanger (102) moves to the outdoor electromagnetic expansion valves (lev, 124) for expanding the refrigerant upon heating and to the indoor heat exchanger (102) for cooling. A supercooling device (not shown) for cooling the refrigerant to be used and a liquid injection device (not shown) for lowering the temperature of the compressor 112 are provided.

Here, the outdoor electromagnetic expansion valve 124 is fully open during cooling to allow the refrigerant condensed in the outdoor heat exchanger 120 to pass through without expansion, but when heated, it is opened to a predetermined size and condensed in the indoor heat exchanger 102. Before expanding to the outdoor heat exchanger (120) to the liquid in the spray state.

In addition, the indoor electromagnetic expansion valve 104 and the outdoor electromagnetic expansion valve 120 includes a step motor (not shown) therein.

3 is a functional block diagram showing an air conditioner according to a first embodiment of the present invention.

Referring to FIG. 3, the air conditioner includes an input unit 210 for inputting a driving command and a release command for a low noise operation at night, a eastern 220 for driving the compressor 112, and an outdoor fan 122, and a compressor 112. Measurement unit 230 for measuring the first operation high pressure and the outdoor temperature of the) and during the cooling or heating operation, if the operation command for the night low noise operation is input, the operation time for the night low noise operation according to the outdoor temperature and To vary the driving standby time, and when the night low noise operation is executed to maintain the first rotational speed (RPM) of the outdoor fan according to the first operating high pressure, or to vary the first rotational speed to the second rotational speed And a controller 240 for controlling the driver 220.

The input unit 210 may input the driving command and the driving release command, and set a first rotational speed RPM of the outdoor fan 122 when the driving command is initially input.

Here, the input unit 210 is installed in at least one of the indoor unit (100, 105, 109) and the outdoor unit (125).

The driver 220 includes a fan driver 222 for driving at a first rotational speed of the outdoor fan 122 and a compressor driver 224 for driving the compressor 112 under the control of the controller 240.

Measurement unit 230 has at least one comprises a sensor (not shown), a temperature measuring unit 232 and the compressor for delivery to the controller 250 to the to the outdoor temperature measured at a predetermined time interval for measuring the outdoor temperature And a pressure measuring unit 234 measuring the first operating high pressure of 112.

In this case, the predetermined time is set by the user or is initially set and is not limited thereto.

When the driving command is input from the input unit 210 during the cooling or heating operation, the controller 240 determines a time when the outdoor temperature transmitted from the temperature measuring unit 232 at the predetermined time interval is the highest.

At this time, if it is determined that the time when the outdoor temperature is the highest, the controller 240 calculates the operation time and the operation waiting time.

Herein, the controller 240 calculates the driving time and the driving waiting time by using a lookup table in which the driving time and the driving waiting time are set relative to the first rotational speed of the outdoor fan 122 for the time when the outdoor temperature is the highest. can do.

The lookup table is shown in Table 1, for example.

step First rotational speed of the outdoor fan Driving time / driving standby time One Stage 1 (500 RPM) 8/9 2 Stage 1 (500 RPM) 6.6 / 10.5 3 Stage 1 (500 RPM) 5/12 4 Stage 2 (400 RPM) 8/9 5 Stage 2 (400 RPM) 6.6 / 10.5 6 Stage 2 (400 RPM) 5/12 7 Stage 3 (300 RPM) 8/9 8 Stage 3 (300 RPM) 6.6 / 10.5 9 Stage 3 (300 RPM) 5/12

[Table 1] is briefly described as follows.

When the driving command is input from the input unit 210, the controller 240 determines a time at which the outdoor temperature is the highest, and calculates the driving time and the driving waiting time for the night low noise operation by using Table 1 below.

For example, assuming that a driving command for night low noise operation is input in the case of Korea and that the time when the outdoor temperature is the highest is 1:00 pm, the controller 240 sets the outdoor fan 122 at the first rotational speed (step 1). The outdoor fan 122 is driven with the operation time and the operation standby time at the time of <step 1> for low noise operation at night.

That is, the control unit 240 is the driving wait time is 8 hours and the driving time is 9 hours, which is the time for the night low noise operation is executed from 1 pm to 9 pm after 8 hours and the night low noise operation The low-noise operation is executed until 6 am the next day after the end of this time is 9 hours.

In addition, in the case of Australia, when a driving command for night low noise operation is input and the time when the outdoor temperature is the highest is 3:00 pm, the controller 240 controls the outdoor fan 122 at the first rotational speed (3 steps) for the night low noise. In order to operate, the outdoor fan 122 is driven with the operation time and the operation standby time at the time of <step 3>.

That is, the control unit 240 is the driving wait time is 5 hours and the driving time is 12 hours, which is the time that the night low-noise operation is executed from 3 pm to 8 pm elapsed 5 hours and the night low noise operation The low-noise operation is executed until 8:00 am the next day after the end of this time 12 hours.

The controller 240 calculates the operation time and the operation waiting time for the night low noise operation, and then executes the night low noise operation after the operation waiting time elapses.

Here, when the night low noise operation is executed, the controller 240 compares the first operating high pressure and the first set high pressure of the compressor 112 transmitted from the pressure measuring unit 234 to determine the first rotational speed of the outdoor fan 122. Is varied or maintained at the second rotational speed.

That is, the controller 240 changes the first rotational speed of the outdoor fan 122 to the second rotational speed when the first operating high pressure is equal to or greater than the first set high pressure, and the first operating high pressure is the first setting. If it is less than a high pressure, the said 1st rotation speed is maintained.

In this case, when the outdoor fan 122 is changed at the second rotation speed, the controller 240 measures the second operating high pressure of the compressor 112 and compares it with the second set high pressure, and the second operating high pressure of the compressor 112 is increased. The second rotational speed of the outdoor fan 122 is changed to a third rotational speed if the second set high pressure or more, and the second rotational speed of the outdoor fan 122 is set if the second operating high pressure is less than the second set high pressure. Variable at the first rotational speed.

Therefore, the air conditioner of the present invention can adjust the low-noise operation time at night according to the rotational speed and environmental conditions of the outdoor fan according to the load, there is an advantage that the low-noise operation at night as well as at night.

In addition, the air conditioner of the present invention can measure the operating high pressure of the compressor during the low-noise operation at night, when the load capacity is increased to increase the rotational speed of the outdoor fan can be optimal cooling or heating.

4 is a flowchart illustrating a control method of an air conditioner according to a first embodiment of the present invention.

Referring to Figure 4, the control method of the present air conditioner is as follows.

The temperature measuring unit 232 measures the outdoor temperature at predetermined time intervals during the heating or cooling operation and transmits it to the control unit 240 (S100).

The controller 240 determines whether a driving command for night low noise operation is input from the input unit 210, and continuously measures the outdoor temperature when the driving command is not input (S102).

If the driving command is input as a result of the determination, the controller 240 determines a time at which the outdoor temperature is the highest (S104), and calculates an operation time and an operation waiting time for the night low noise operation (S106).

The controller 240 executes the cooling or heating operation during the operation waiting time, and then executes the night low noise operation when the operation waiting time elapses (S108).

The pressure measuring unit 234 measures the first operating high pressure of the compressor 112 when the night low noise operation is executed (S110).

The control unit 240 maintains the first rotational speed of the outdoor fan 122 when the first operating high pressure is less than the first set high pressure by comparing the first operating high pressure with the first set high pressure (S112). When the first operation high pressure is equal to or greater than the first set high pressure, the first rotational speed of the outdoor fan 122 is changed to a second rotational speed (S114).

The pressure measuring unit 234 measures the second operating high pressure of the compressor 112 (S116).

The control unit 240 compares the second operating high pressure with the second set high pressure (S118), and if the second operating high pressure is less than the second set high pressure, the second rotational speed of the outdoor fan 122 is rotated by the first rotation. When the second operating high pressure is equal to or greater than the second set high pressure, the second rotational speed of the outdoor fan 122 is changed to a third rotational speed (S122).

Here, after the outdoor fan 122 is changed to the third rotational speed, the control unit 240 returns to step S118, and at this time, the third rotational speed of the outdoor fan 122 is varied according to the set method.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made to the branches. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

1 is a perspective view of a building equipped with an air conditioner according to a first embodiment of the present invention.

FIG. 2 briefly illustrates and describes the multi-type air conditioner described in FIG. 1, but is not limited thereto.

3 is a functional block diagram showing an air conditioner according to a first embodiment of the present invention.

4 is a flowchart illustrating a control method of an air conditioner according to a first embodiment of the present invention.

Claims (12)

Measuring the outdoor temperature during cooling or heating operation; Inputting a driving command for night low noise driving; Varying an operation time and an operation waiting time for the night low noise operation according to the outdoor temperature; After the operation waiting time elapses, during the operation time, the outdoor fan operates at a first rotational speed and measures a first operation high pressure of the compressor; Comparing the first operating high pressure with a first set high pressure to determine whether the outdoor fan is variable with a first rotational speed; And Maintaining the first rotational speed of the outdoor fan or varying the first rotational speed of the outdoor fan to a second rotational speed to continue the nighttime low-noise operation according to the determination result. Control method. The method of claim 1, wherein the variable step, And controlling the operation time and the operation waiting time according to the point of time when the room temperature is the highest. The method of claim 1, wherein the determining step, And determining whether the pressure is higher than the first set high pressure. The method of claim 3, wherein the sustaining step, When the first operating high pressure is equal to or greater than the first set high pressure, the first rotational speed of the outdoor fan is changed to the second rotational speed, And controlling the first rotational speed of the outdoor fan when the first operating high pressure is less than the second set high pressure. The method of claim 1, When the outdoor fan is changed to the second rotational speed after the sustaining step, the second operating high pressure of the compressor is measured and compared with a second set high pressure, and whether the outdoor fan is variable with respect to the second rotational speed is again determined. Judging, varying the second rotational speed of the outdoor fan to a third rotational speed, or varying the second rotational speed of the outdoor fan to the first rotational speed to resume the nighttime low noise operation. Air conditioner control method. The method of claim 5, When the second operating high pressure is equal to or greater than the second set high pressure, the second rotational speed of the outdoor fan is changed to the third rotational speed, And controlling the second rotation speed of the outdoor fan to the first rotation speed when the second operation high pressure is less than the second set high pressure. The method of claim 5, wherein the first and second set high pressure, Control method of an air conditioner, characterized in that different from each other. An input unit for inputting an operation command and a release command for night low noise operation; A drive unit for driving the compressor and the outdoor fan; A measuring unit measuring a first operating high pressure and an outdoor temperature of the compressor; And During the cooling or heating operation, when the operation command for the night low noise operation is input, the operation time and the operation waiting time for the night low noise operation are changed according to the outdoor temperature, and when the night low noise operation is executed, the first operation And a control unit configured to maintain the first rotational speed of the outdoor fan according to a high pressure or to control the driving unit to change the first rotational speed to a second rotational speed. The method of claim 8, wherein the control unit, And the operation time and the operation waiting time are varied based on the time when the outdoor temperature is the highest. The method of claim 9, The operation waiting time is from the time when the outdoor temperature is the highest to the time when the night low noise operation is executed, And the operation time is an execution time of the night low noise operation. The method of claim 8, wherein the control unit, When the first operating high pressure is equal to or greater than the first predetermined high pressure, the first rotational speed of the outdoor fan is changed to the second rotational speed, And the first rotational speed of the outdoor fan is maintained if the first operating high pressure is less than the first set high pressure. The method of claim 11, wherein the control unit, When the outdoor fan is variable at the second rotational speed, the second operating high pressure of the compressor is measured. And the second rotational speed of the outdoor fan is changed to the first rotational speed when the second operation high pressure is less than the second set high pressure.

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