KR101541729B1 - Operation Control Method of Air-Conditioner - Google Patents

Operation Control Method of Air-Conditioner Download PDF

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Publication number
KR101541729B1
KR101541729B1 KR1020150093937A KR20150093937A KR101541729B1 KR 101541729 B1 KR101541729 B1 KR 101541729B1 KR 1020150093937 A KR1020150093937 A KR 1020150093937A KR 20150093937 A KR20150093937 A KR 20150093937A KR 101541729 B1 KR101541729 B1 KR 101541729B1
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KR
South Korea
Prior art keywords
condenser
fan
control unit
heat
temperature
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KR1020150093937A
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Korean (ko)
Inventor
권혁중
박승태
박은규
Original Assignee
주식회사 에이티이엔지
박승태
박은규
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Priority to KR1020150093937A priority Critical patent/KR101541729B1/en
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Publication of KR101541729B1 publication Critical patent/KR101541729B1/en

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    • F24F11/0076—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F24F11/025—
    • F24F2011/0049—

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

A method to control operation of an air conditioner including a housing installed outdoors, a compressor installed inside the housing, a condenser, a control unit controlling a fan to cool heat of the condenser, and an injecting device in accordance to one aspect of the present invention comprises: (a) a step of driving the compressor using the control unit when an indoor cooling temperature is set; (b) a step of rotating the fan to cool the heat of the condenser while the condenser heat exchanges; (c) a step in which the control unit determines whether it is nighttime or daytime using a temperature sensor sensing an outdoor temperature, and an illumination sensor sensing outdoor illumination; (d) a step in which the control unit controls the number of the rotation of the fan to cool the heat of the condenser when the outdoor unit is at a preset temperature; and (e) a step of cooling the heat of the condenser by injecting water to the condenser using the injecting device.

Description

{Operation Control Method of Air-Conditioner}

The present invention relates to a method of controlling an operation of an air conditioner, and more particularly, to an operation control method of an air conditioner in which noise generated when a fan rotates by lowering the heat of an air conditioner installed outdoors is reduced .

Generally, an air conditioner is a device for cooling or heating indoor air by using a refrigerant circulation cycle which causes a refrigerant to sequentially perform compression, condensation, expansion and evaporation processes.

The air conditioner may include at least one outdoor unit and at least one indoor unit. The outdoor unit is provided with a compressor, an outdoor fan, and an outdoor heat exchanger, and the indoor unit is provided with an indoor heat exchanger and an indoor fan.

When the indoor load is large, the rotational speed of the outdoor fan is increased and noise due to the rotation of the outdoor fan is generated.

Korean Patent Publication No. 10-2003-0043033 (published on June 02, 2003) Korean Patent Publication No. 10-2009-0003872 (published on Jan. 12, 2009)

It is an object of the present invention to provide an operation control method of an air conditioner capable of reducing noise generated in an air conditioner.

According to an aspect of the present invention, there is provided an operation control method for an air conditioner, including a housing installed outdoors, a compressor installed inside the housing, a condenser, and a fan for lowering the heat of the condenser. And a control unit for controlling the injector, the method comprising the steps of: (a) when the indoor cooling temperature is set, driving the compressor through the control unit; (b) rotating the fan to heat-exchange the condenser and lower the heat of the condenser; (c) determining a daytime and a nighttime in the control unit by a light intensity sensor for sensing an outdoor lightness and a temperature sensor for sensing an outdoor temperature; (d) the control unit controls the number of revolutions of the fan in the control unit to lower the heat of the condenser when the outside air temperature reaches a predetermined set temperature; (e) lowering the heat of the condenser by spraying water from the injector with the condenser to control the number of revolutions of the fan; . ≪ / RTI >

The control unit controls the injection amount to be injected into the condenser according to the number of revolutions of the fan. When the number of revolutions of the fan is the same during the daytime and at night, the control unit can control the injection amount of the injection device to be lower than nighttime.

Wherein the control unit determines that the illuminance detected by the illuminance sensor is equal to or greater than the reference value and operates the noise to be less than 60 db (A) when the fan rotates, The noise generated when the fan rotates can be operated to be less than 50db (A).

The control unit controls the fan motor to adjust the rotation speed of the fan according to the outside air temperature. The controller controls the injection amount of the injector to be injected into the condenser according to the rotation speed of the fan controlled by the motor control unit. And an injection control unit.

The motor control unit sets at least one of the set temperatures of the daytime to 34 ° C, 31 ° C, and 28 ° C and sets at night at least one of 22 ° C, 24 ° C, and 26 ° C so that the outside air temperature reaches each set temperature The number of revolutions of the fan can be adjusted.

The injector includes a strainer for filtering the water supplied from the water tank, a pump for adjusting the injection amount of the water passed through the strainer, and a pump for injecting a predetermined amount of water into the condenser through the pump to lower the heat of the condenser, And a spray nozzle for reducing the number of rotations of the spray nozzle.

According to the operation control method of the air conditioner according to the present invention, water is sprayed from the spray device to lower the heat of the condenser to control the number of revolutions of the fan, thereby reducing noise.

1 is a flowchart showing a method of controlling an operation of an air conditioner according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a configuration of an air conditioner according to an embodiment of the present invention.
3 is a flowchart illustrating an operation control method of an air conditioner according to another embodiment of the present invention.
4 is a graph showing a water injection amount according to the number of rotations of a fan according to another embodiment of the present invention.

Hereinafter, an operation control method of an air conditioner according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating an operation control method of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a conceptual view illustrating a configuration of an air conditioner according to an embodiment of the present invention.

1 and 2, an air conditioner 10 according to an embodiment of the present invention includes a housing 100 installed outdoors, a compressor 200 installed inside the housing 100, A condenser, a fan 500 for lowering the heat of the condenser, and a control unit 400 for controlling the injector 600.

In the air conditioner 10, the housing 100, which is installed outdoors, may include a plurality of vents through which internal heat is discharged. Inside the housing 100, a compressor 200 A condenser for exchanging heat between the refrigerant and outdoor air, a fan 500 for lowering the heat of the condenser by blowing air to the condenser, and a fan motor.

In addition, an injector 600 for lowering heat by spraying water to the condenser may be provided to reduce noise generated when the fan 500 is driven. The injector 600 can be installed in various positions inside and outside the housing 100 and the number of rotations of the fan 500 for lowering the heat of the condenser by spraying water to the condenser, Can be adjusted. Since the number of rotations of the fan 500 is controlled, noise generated in the air conditioner 10 can be reduced.

The water injector 600 is installed separately from the water tank, and the water in the water tank is injected into the water injector 600 through the water injector 600, the water tank provided in the building, May be provided.

The injector 600 includes a strainer 610 for filtering water supplied from a water tank and a water tank, a pump 620 for controlling the amount of water sprayed through the strainer 610, And a spray nozzle 630 for spraying a predetermined amount of water to the condenser and reducing the number of revolutions of the fan 500 by lowering the heat of the condenser.

The Y strainer 610 and the U strainer 610 are provided to prevent the solid or foreign matter from entering when the water supplied from the water tank 640 passes through the injection nozzle 630 Can be used.

In addition, the water tank 640 may be provided with a sterilizing lamp to prevent bacteria from living in the water of the cooling tower, such as Legionella, or the polluted water.

The pump 620 may supply a predetermined amount of water to the injection nozzle 630 by the information transmitted by the control unit 400. The injection nozzle 630 may be provided inside and outside the housing 100 And the water conveyed through the pump 620 can be sprayed to lower the heat of the condenser.

In addition, the injector 600 can drain the water from the water tank 640 to the injection nozzle 630 to prevent the freezing of the water in the winter when the temperature is low.

In addition to lowering the heat of the condenser by the injector 600, the condenser fins may be cleaned to maintain a clean state at all times, thereby improving efficiency of the heat exchanger during the year.

The air conditioner 10 further includes an illuminance sensor 700 for measuring an outdoor illuminance and a temperature sensor 800 for measuring an outside air temperature, And a control unit 400 for determining the daytime and the nighttime according to the illuminance value measured by the temperature sensor 800, the outside air temperature, and the time of the timer.

The control unit 400 includes a motor control unit 410 for controlling a fan motor that adjusts the number of rotations of the fan 500 according to the outside air temperature and a jet control unit 420 for controlling the jetting amount of the jetting apparatus 600, .

Hereinafter, the operation control method of the air conditioner of the present invention will be described in detail with reference to FIG. 1 attached hereto.

If the indoor cooling temperature is set in step S100, the indoor unit can be driven. In step S200, the compressor 200 for compressing the refrigerant through the control unit 400 and the condenser for exchanging heat between the refrigerant and the outdoor air .

In step S300, when the heat exchange is performed in the condenser, the fan 500 may be rotated to lower the heat of the condenser.

In step S400, the illuminance sensor 700 senses the outdoor illuminance and transmits the sensed illuminance value to the control unit 400. In step S500, the temperature sensor 800 senses the ambient temperature and transmits the sensing result to the control unit 400 .

The control unit 400 can determine the daytime and the nighttime based on the illuminance value and the ambient temperature received from the illuminance sensor 700 and the temperature sensor 800.

For example, if the illuminance value determined by the control unit 400 as day and night is set as a reference value, and the illuminance measured by the illuminance sensor 700 is equal to or greater than the reference value, It can be judged at night.

In step S600, the control unit 400 may compare the set temperature preset by the temperature sensor 800 with the outside temperature measured by the temperature sensor 800. [ The set temperature set in advance by the control unit 400 can be set differently between day and night. In the daytime, the set temperature is set to at least one of 34 ° C, 31 ° C, and 28 ° C, Deg.] C, and 26 [deg.] C.

In step S700, the motor control unit 410 of the control unit 400 can control the number of rotations of the fan 500 when the outside air temperature reaches the set temperature in step S600.

The motor control unit 410 controls the fan motor to rotate the fan 500 so that the generated noise is less than 60 db (A) when the fan 500 rotates in the daytime. When the illuminance value is less than the reference value, It is possible to control the fan motor to rotate the fan 500 so that the noise generated when the fan 500 rotates is less than 50 db (A).

In step S800, when the rotation noise of the fan 500 for lowering the heat of the condenser is large in the injection controller 420 of the control unit 400, the injection device 600 is driven to spray water to the condenser .

In this way, water can be injected into the condenser or the fan 500 can be rotated to lower the condensation pressure of the condenser, thereby improving the COP.

For example, the COP improvement of the refrigerator performance factor is COP = 16,942W / 6,274 when the evaporator temperature of the compressor (200) is 10 ° C and the condensation temperature is 55 ° C because the evaporation temperature is 5 ° C, the superheating degree is 5 ° C and the air- W = 2.70 (100%). At this time, when water is sprayed or the fan 500 is rotated to maintain the evaporation temperature of 10 ° C and the condensation temperature of 45 ° C, COP = 19,661 W / 5,280 W = 3.72 (138%), At 40 ℃, COP = 20,960W / 4,792W = 4.37 (162%), which improves the energy efficiency of the refrigerator.

Since the heat of the condenser is lowered, the number of revolutions of the fan 500 can be reduced to reduce the noise.

Hereinafter, an operation control method of an air conditioner according to another embodiment of the present invention will be described with reference to the same reference numerals as those of the operation control method of an air conditioner according to the above- Is omitted.

FIG. 3 is a flowchart illustrating an operation control method of an air conditioner according to another embodiment of the present invention, and FIG. 4 is a graph illustrating a water injection amount according to a rotation number of a fan according to another embodiment of the present invention.

In the operation control method of the air conditioner, when the indoor cooling temperature is set (step S1100), the compressor 200 and the condenser are driven (steps S1200 and S1300).

When the condenser is driven, the fan 500 may be rotated toward the condenser (step S1400) to lower the heat generated in the condenser. The fan 500 may be controlled by a motor control unit 410 of the control unit 400 and the control unit 400 may include an injection controller 420 for controlling the injector 600 for lowering the heat of the condenser .

The control unit 400 determines the day and night by the illuminance value for measuring the outdoor illuminance (step S1500) and the ambient temperature (step S1600) measured by the temperature sensor 800 in the illuminance sensor 700 S1700).

The condenser has a different calorific value depending on the outside temperature and the outside temperature may be lower than the nighttime. Therefore, the control unit 400 can set the preset temperature differently in the daytime and the nighttime as shown in [Table 1].

Day / Night Set temperature Outside temperature Rotation number of fan (500) Water injection amount
weekly
34 ℃ 34 ℃ or more 1 RPM Large D 31 C 31 ℃ or more 2 RPM Medium D 28 ℃ 28 ℃ or more 3 RPM Small (small) D
Nighttime

26 ℃ 26 ℃ or more 1 RPM Large N 24 ℃ 24 ℃ or more 2 RPM Medium N 22 ℃ 22 ℃ or more 3 RPM Small N 22 ℃ Less than 22 ℃ 4 RPM No watering

The preset temperature set in advance by the control unit 400 is set to at least one of 34 ° C, 31 ° C, and 28 ° C for the daytime set temperature as shown in Table 1, and the set night temperature is set at 22 ° C, 24 ° C, Lt; RTI ID = 0.0 > 26 C. < / RTI >

If it is determined by the control unit 400 that the air conditioner is in the daytime, the set temperature is as shown in Table 1, and it is determined whether the outside air temperature is equal to or higher than 34 ° C by comparing the outside temperature and the set temperature (step S2100).

When the outside air temperature is equal to or higher than the set temperature of 34 ° C, water can be injected into the condenser in the injector 600.

At this time, in the present invention, the injection amount of water injected into the condenser in the injector 600 can be divided into large, medium, and small. As shown in the graph of FIG. 4, Even if the number of revolutions of the fan 500 is the same during daytime and nighttime, nighttime may be injected less than during the daytime, so DAY is divided into large D, medium D, and small D, NIGHT can be divided into large N, medium N, and small N. In addition, at night, the fan 500 should be operated at a low speed in order to reduce the noise of the fan 500, but the condensing pressure of the condenser should not be increased even if the fan 500 operates at a low speed.

Therefore, when the outside air temperature is 34 DEG C or higher, the amount of heat generated by the condenser increases, so that the injection amount may be large. As the heat of the condenser is lowered by the sprayed water, The noise may be lowered (step S2110)

If it is determined that the outdoor temperature is between 31 and 34 ° C, which is the set temperature, it is determined to be equal to or higher than the set temperature 31 ° C (step S2200). Water is injected into the condenser with the injection quantity as medium D, The water is controlled so as to increase as the amount of water sprayed is reduced to 2 RPM to lower the noise (step S2210)

If it is determined that the outside air temperature is between 28 and 31 degrees Celsius, which is the set temperature, it is determined that the preset temperature is 28 degrees Celsius or more (step S2300), water is injected into the condenser at a small injection amount D, The rotational speed is controlled so as to increase as the amount of water injected is reduced, and the noise can be controlled by controlling it to 3RPM (step S2310).

When the outside air temperature is measured to be lower than a predetermined set temperature, the condensation pressure set by the outside air temperature is maintained, so that noise caused by the rotation of the fan 500 can be lowered without spraying water from the injector 600. (Step S2400)

In this way, the injection amount of the injector 600 and the number of rotations of the fan 500 can be controlled so that the noise caused by the rotation of the fan 500 can be reduced to 60 db (A) or less during the day (step S2500).

If the control unit 400 determines that it is night by the outdoor illumination, the set temperature is as shown in Table 1, and it is determined whether the outside temperature is 26 ° C or more by comparing the outside temperature and the set temperature (step S3100).

When the outdoor temperature is 26 ° C or higher, the amount of heat generated in the condenser is increased. However, since the amount of heat does not increase at night than during the daytime, the amount of injection may be large N. Since the heat of the condenser is lowered by the sprayed water, 500 may be reduced to 1 RPM (step S3110)

If it is determined that the outdoor temperature is between 24 and 26 ° C., which is the set temperature, it is determined that the temperature is 24 ° C. or higher (step S 3200). Water is sprayed to the condenser at the middle of N, The water is controlled so as to increase as the amount of water injected is reduced so as to be controlled to 2RPM to reduce the noise (step S3210)

If it is determined that the outdoor temperature is within the range of 22 to 24 ° C, the outdoor temperature is determined to be equal to or higher than the set temperature of 22 ° C (step S3300), water is injected into the condenser at a small injection amount, The rotational speed is controlled so as to increase as the amount of water sprayed is reduced, and the noise can be controlled by controlling the amount of water to 3RPM (step S3310)

When the outside air temperature is measured to be lower than a predetermined set temperature, the condensation pressure set by the outside air temperature is maintained, so that the noise generated when the fan 500 rotates without spraying water from the injector 600 is 50 db A), the number of rotations of the fan 500 can be controlled to 4RPM (step S3400).

In this way, by controlling the injection amount of the injector 600 and the number of rotations of the fan 500, noise caused by rotation of the fan 500 can be operated at 50 dB (A) or less during the night to perform low noise operation and energy saving operation (Step S3500)

The energy cost can be reduced by the operation control method of the air conditioner as in the present invention.

For example, if the number of rotations of the fan 500 is controlled to lower the heat of the condenser and water is sprayed to the condenser, the cost incurred by installing the injector 600 and the cost of the water supply are added, The addition and the reduction can be canceled by the injection device 600 and the water cost due to the water supply is generated. When the condenser is operated at 1.0 kW and the condensation heat amount is 5.0 kW, 40% of 2.0 kW is treated as a water mist The electricity cost is 1kWh @ 100 won / kWh and the water supply is 1,120 won (950 + 170) per 1,000kg, and it is 1.12 won / kg per kg because it is 2.0kW * 860kcal / kWh / (539kcal / kg * 50%) = 6.5kg / When the compressor (200) is at 10.0 kWh (COP 3.0), 2.5 kWh * 24h * at 7.5 kWh (COP 4.0) is reduced to 5,400 kWh at 90 days. The electricity cost is 540,000 won. The tap water cost is 40,000 won and annual profit is 500,000 won. Is 11,700kg per month and is less than 8.0% of electricity cost, so energy cost can be reduced have.

Although the operation control method of the air conditioner according to the embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments shown in this specification. Those skilled in the art, who understands the spirit of the present invention, can readily suggest other embodiments by adding, changing, deleting, adding, or the like of components within the scope of the same idea, I would say.

10: air conditioner 100: housing
200: compressor 300: condenser
400: control unit 500: fan
600: Injection device

Claims (6)

A method of controlling an operation of an air conditioner including a housing installed outside the housing, a compressor provided inside the housing, a condenser, and a control unit for controlling the fan and the injector to lower the heat of the condenser,
(a) when the indoor cooling temperature is set, driving the compressor through the control unit;
(b) rotating the fan to heat-exchange the condenser and lower the heat of the condenser;
(c) determining a daytime and a nighttime in the control unit by a light intensity sensor for sensing an outdoor lightness and a temperature sensor for sensing an outdoor temperature;
(d) the control unit controls the number of revolutions of the fan in the control unit to lower the heat of the condenser when the outside air temperature reaches a predetermined set temperature;
(e) lowering the heat of the condenser by spraying water from the injector with the condenser to control the number of revolutions of the fan;
And controlling the operation of the air conditioner.
The method according to claim 1,
In the step (e)
Wherein the control unit controls an injection amount to be injected into the condenser according to the number of revolutions of the fan and controls the injection amount of the injector to be lower at night than a week when the number of revolutions of the fan is the same between day and night A method for controlling operation of an air conditioner.
The method according to claim 1,
Wherein the control unit determines that the illuminance detected by the illuminance sensor is equal to or greater than the reference value and operates the noise to be less than 60 db (A) when the fan rotates, Wherein the operation is performed such that the noise generated when the fan rotates is less than or equal to 50 db (A).
3. The method of claim 2,
The control unit includes a motor control unit for controlling a fan motor that adjusts the number of rotations of the fan according to the outside air temperature,
And an injection control unit for controlling an injection amount of the injector injected to the condenser according to the rotational speed of the fan controlled by the motor control unit.
5. The method of claim 4,
The motor control unit sets at least one of the set temperatures of the daytime to 34 ° C, 31 ° C, and 28 ° C and sets at night at least one of 22 ° C, 24 ° C, and 26 ° C so that the outside air temperature reaches each set temperature Wherein the controller controls the rotation speed of the fan.
The method according to claim 1,
The injection device includes a strainer for filtering water supplied from a water tank,
A pump for controlling an injection amount of water passed through the strainer,
And an injection nozzle for injecting a predetermined amount of water into the condenser through the pump and reducing the number of revolutions of the fan by lowering the heat of the condenser.

KR1020150093937A 2015-07-01 2015-07-01 Operation Control Method of Air-Conditioner KR101541729B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969466A (en) * 2017-03-22 2017-07-21 珠海格力电器股份有限公司 Condense control method, the device and system of the blower fan of unit
CN109114729A (en) * 2018-07-26 2019-01-01 青岛海尔空调器有限总公司 A kind of air-conditioner control method and air conditioner
CN109114849A (en) * 2018-09-27 2019-01-01 吴建宁 Air conditioner energy saving denoising device and coach air conditioner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000035227A (en) 1998-07-15 2000-02-02 Daikin Ind Ltd Air conditioner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000035227A (en) 1998-07-15 2000-02-02 Daikin Ind Ltd Air conditioner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969466A (en) * 2017-03-22 2017-07-21 珠海格力电器股份有限公司 Condense control method, the device and system of the blower fan of unit
CN109114729A (en) * 2018-07-26 2019-01-01 青岛海尔空调器有限总公司 A kind of air-conditioner control method and air conditioner
CN109114729B (en) * 2018-07-26 2021-04-20 青岛海尔空调器有限总公司 Air conditioner control method and air conditioner
CN109114849A (en) * 2018-09-27 2019-01-01 吴建宁 Air conditioner energy saving denoising device and coach air conditioner

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