KR101166380B1 - Air conditioner and control method thereof - Google Patents

Abstract

The present invention relates to a surround discharge type air conditioner having two discharge ports and a control method thereof. The present invention provides a surround sensation efficiency felt by a user by controlling the air volume of the indoor fan and the frequency of the compressor while controlling the air discharge direction at various angles. The purpose is to make it high.

To this end, the present invention has a plurality of discharge ports, each of the plurality of discharge ports are provided with blades for adjusting the discharge direction of the air, the control method of the air conditioner to control the discharge direction of the air in the user's command Selecting a surround airflow pattern for operating the respective blades independently; And controlling the frequency of the compressor based on the operation of each blade while independently operating each blade according to the selected surround airflow pattern.

Description

Air conditioner and control method

1 is a perspective view showing an indoor unit of an air conditioner according to the present invention;

Figure 2 is a front sectional view showing the indoor unit of Figure 1,

3 is a cross-sectional view taken along line II of FIG. 2;

4 is a refrigerant cycle diagram of an air conditioner according to the present invention;

5 is a control block diagram of an air conditioner according to an embodiment of the present invention;

6 is an operation flowchart of a control method of an air conditioner according to the present invention;

7 is a first graph illustrating an operation of an indoor fan and a compressor according to a surround airflow pattern of an air conditioner according to the present invention;

8 is a second graph showing the operation of the indoor fan and the compressor according to the surround airflow pattern of the air conditioner according to the present invention;

9 is a third graph showing the operation of the indoor fan and the compressor according to the surround airflow pattern of the air conditioner according to the present invention;

10 is a fourth graph showing the operation of the indoor fan and the compressor according to the surround airflow pattern of the air conditioner according to the present invention.

Description of the Related Art [0002]

10: indoor unit 12: suction port

14a, 14b: discharge port 16a, 16b: blade

20a, 20b: Indoor heat exchanger 22a, 22b: Indoor fan

50: outdoor unit 52: compressor

100 input unit 120 control unit

170: blade drive unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner of a surround discharge type having two discharge ports, and more particularly to an air conditioner and a control method of improving a surround haptic effect felt by a user through frequency control of a compressor while controlling the discharge direction of air at various angles. It is about.

In general, an air conditioner is a device used for cooling or heating a room, and circulates a refrigerant between an indoor unit and an outdoor unit to absorb ambient heat when the liquid refrigerant evaporates and releases heat when liquefied. By using the characteristics to supply cold or warm air, a compressor is used to compress the refrigerant circulating between the indoor unit and the outdoor unit.

The compressor stops the operation when the indoor temperature reaches the set temperature, and performs the heating and cooling operation through the on / off control of the compressor which is operated again when the indoor temperature differs by a predetermined value (± 1 ° C.) from the set temperature.

However, such a conventional air conditioner forms only one discharge port for discharging the heat-exchanged air, so that the direction of the air discharged through the discharge hole is controlled to be the same, and thus it is not possible to control the wide space evenly, and to quickly control the entire indoor space. There is a disadvantage.

This causes the user's driving preference range required for the air conditioner to increase according to the recent changes in the market environment, making it impossible to satisfy various preference conditions of the user.

Therefore, the present invention is to solve the conventional problems as described above, an object of the present invention is to control the direction of the air discharged by the surround discharge method having two discharge ports in multiple angles to control a large space more quickly The present invention provides an air conditioner having a high air conditioning effect and a control method thereof compared to an air conditioner of the same capacity.

Another object of the present invention is to provide an air conditioner and a method of controlling the same, which improves the surround sensation efficiency felt by a person by controlling the air volume of the indoor fan and the frequency of the compressor while controlling the air discharge direction at various angles.

In order to achieve the above object, the present invention has a plurality of discharge ports, and in each of the plurality of discharge ports, an air conditioner provided with blades for adjusting the discharge direction of air, wherein the respective blades operate independently of the plurality of discharge ports An input unit for selecting a surround airflow pattern in which a direction of air discharged through the air is controlled at various angles; And a controller for independently operating each blade according to the selected surround airflow pattern.

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In addition, the control unit is characterized in that the variable control of the frequency of the compressor based on the change amount of the room temperature and the set temperature generated by the operation of each blade.

In addition, the present invention further comprises an indoor fan for controlling the air volume of the air discharged through the plurality of discharge ports, the control unit is characterized in that for controlling the air volume of the indoor fan in accordance with the frequency of the compressor.

The control unit may store a table indicating a correlation between the frequency of the compressor and the air volume of the indoor fan according to the operation pattern of each blade.

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The present invention has a plurality of discharge ports, each of the plurality of discharge ports are provided with blades for adjusting the discharge direction of the air is a control method of the air conditioner for controlling the discharge direction of the air, wherein each of the blades Selecting a surround airflow pattern in which the directions of the air discharged through the plurality of discharge ports are controlled at various angles by operating independently of each other; And controlling the frequency of the compressor based on the change amount of the room temperature and the set temperature generated by the operation of each blade while operating the respective blades independently according to the selected surround airflow pattern.

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The present invention may further include controlling the air volume of the indoor fan according to the frequency of the compressor.
In addition, the present invention has a table indicating the correlation of the frequency of the compressor according to the operation pattern of each blade in the surround airflow pattern, and refer to the table while operating each blade independently in accordance with the selected surround airflow pattern By controlling the frequency of the compressor to a frequency corresponding to the operation pattern of each blade.

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

1 is a perspective view showing an indoor unit of an air conditioner according to the present invention.

In FIG. 1, the indoor unit 10 has an inlet 12 formed at the front and an upper portion thereof to suck up the indoor air, and the two outlets 14a and 14b are formed so that the air sucked through the inlet 12 is discharged back into the room. Is formed side by side on the front lower side.

The discharge ports 14a and 14b rotate and open and discharge the respective discharge ports 14a and 14b around the rotational shafts formed along the longitudinal direction of the discharge ports 14a and 14b, and adjust the direction of the air discharged by vertical rotation. Blades 16a and 16b (hereinafter referred to as left and right blades) are respectively installed.

In addition, each of the plurality of blades 20a and 20b is disposed at the discharge ports 14a and 14b to adjust the direction of the discharged air by rotating left and right about the rotating shaft disposed horizontally in the longitudinal direction of the discharge ports 14a and 14b. Is installed.

FIG. 2 is a sectional front view of the indoor unit of FIG. 1, and FIG. 3 is a cross-sectional view taken along line II of FIG. 2.

2 and 3, inside the indoor unit 10, indoor heat exchangers 20a and 20b for exchanging the sucked air to cold or warm air by latent heat of evaporation of the refrigerant are symmetrically arranged on the rear side of the inlet 12. It is installed in two, the rear side of the indoor heat exchanger (20a, 20b) cross-floor (cross flower) indoor fan that sucks air through the inlet 12 and discharges the heat-exchanged air through the outlet 14a, 14b ( Two 22a and 22b are installed, and indoor fan motors 24a and 24b for rotationally driving the respective indoor fans 22a and 22b are installed at one side of the indoor fans 22a and 22b, respectively.

In FIG. 3, a collecting tray 26a is disposed below the indoor heat exchanger 20a to support a lower end of the indoor heat exchanger 20a and temporarily receive condensed water from the indoor heat exchanger 20a to be discharged to the outside.

4 is a refrigerant cycle diagram of an air conditioner according to the present invention.

In FIG. 4, the air conditioner of the present invention includes an outdoor unit 50 forming a normal refrigerant cycle, and an indoor unit 10 connected to the outdoor unit 50 to perform indoor cooling and heating, and the indoor unit 10 and the outdoor unit ( Between 50) a refrigerant pipe is installed.

The outdoor unit 50 includes a compressor 52 for compressing a refrigerant, a four-way valve 54 for adjusting a flow direction of the refrigerant discharged from the compressor 52, and a gas of high temperature and high pressure compressed by the compressor 52. An outdoor heat exchanger 56 that receives refrigerant and exchanges heat with the outdoor air, an outdoor fan 58a for forcibly blowing outdoor air to perform heat exchange in the outdoor heat exchanger 56, and rotates the outdoor fan 58a. An outdoor fan motor 58 for driving and an outdoor expansion valve 60 (or capillary tube) for expanding the refrigerant heat-exchanged in the outdoor heat exchanger 56.

The indoor unit 10 will not be repeated with the structure described in FIGS. 1 to 3.

In the air conditioner having such a refrigerant cycle, the four-way valve 54 is turned on during the heating operation so that the refrigerant flows in the direction of the dotted arrow in FIG. 4 from the compressor 52 to the four-way valve 54 to the indoor heat exchanger 20a and 20b. A refrigerant cycle circulated in the order of the outdoor expansion valve 60 → the outdoor heat exchanger 56 → the four-way valve 54 → the compressor 52 is formed.

In the cooling operation, the four-way valve 54 is turned off, and the refrigerant flows in the direction of the solid arrow in FIG. 4 from the compressor 52 to the four-way valve 54 to the outdoor heat exchanger 56 to the outdoor expansion valve 60 to the indoor heat exchange. And a refrigerant cycle circulated in the order of 20a, 20b → four-way valve 54 → compressor 52.

In the air conditioner forming the refrigerant cycle as described above, the user inputs the desired operation mode (cooling or heating), the set temperature, and the set air volume, and then turns on the operation key, and the two indoor fans 22a and 22b are set. The indoor air is sucked into the indoor unit 10 through the suction port 12 while rotating in accordance with the air volume.

By comparing the temperature and the set temperature of the indoor air sucked through the suction port 12 and controlling the operating frequency of the compressor 52 according to the difference between the room temperature and the set temperature to drive the compressor 52 to perform the heating and cooling function.

5 is a control block diagram of an air conditioner according to an embodiment of the present invention, an input unit 100, an indoor temperature sensing unit 110, a control unit 120, a compressor driving unit 130, and an outdoor fan motor driving unit 140. ), An indoor fan motor driving unit 150, a valve driving unit 160, a blade driving unit 170, and a display unit 180 are configured.

The input unit 100 includes an operation unit for inputting operation information such as a driving mode (cooling or heating operation) selected by a user, a set temperature, a set air volume, and the like, and the air discharged through the two discharge ports 14a and 14b. In order to control the direction of the multiple angles, the user selects the surround airflow patterns ① and ⑦ of the left and right blades 16a and 16b as follows.

① Swing left blade 16a + right blade 16b: Swing left blade 16a and right blade 16b in the same direction

② Swing left blade 16a + right blade 16b: Swing left blade 16a and right blade 16b in opposite (cross) direction

③ Left blade 16a fixed + right blade 16b swing

④ Swing left blade (16a) + right blade (16b)

⑤ Fix the left blade (16a) + fix the right blade (16b)

⑥ Left blade (16a) closed + right blade (16b) swing

⑦ Left blade (16a) swing + right blade (16b) closed

The indoor temperature detecting unit 110 detects the temperature of the indoor air sucked into the indoor unit 10 through the inlet 12.

The controller 120 controls the air volume of the indoor fans 22a and 22b for each surround airflow while controlling the surround airflow discharged through the discharge ports 14a and 14b according to the airflow selection signal input from the input unit 100. As a microcomputer that controls the frequency of the compressor 52 to maximize the user's feeling of surround airflow, the frequency of the compressor 52 is determined according to the difference between the room temperature and the set temperature.

In addition, the control unit 120 is pre-stored on the purge table according to the difference between the room temperature and the set temperature of the air volume of the indoor fan (22a, 22b) and the frequency control of the compressor 52 suitable for the surround air flow fan selected by the user have.

The compressor driver 130 controls the driving of the compressor 52 according to the compressor control signal of the controller 120, and the outdoor fan motor driver 140 controls the outdoor fan motor according to the outdoor fan control signal of the controller 120. The drive of 58 is controlled.

The indoor fan motor driver 150 controls the driving of the indoor fan motors 24a and 24b according to the indoor fan control signal of the controller 120, and the valve driver 160 is operated by the input unit 100. According to the cooling or heating operation), the control unit 120 controls the four-way valve 54 and the outdoor expansion valve 60 to switch the refrigerant cycle to cooling or heating.

The blade driving unit 170 selectively opens and closes the discharge ports 14a and 14b according to the operation mode (cooling or heating operation) input from the input unit 100, and at the same time, each discharge port 14a and 14b selectively opened. The drive motor to rotate the blades (16a, 16b) in accordance with the blade control signal of the control unit 120 to adjust the direction of the air discharged through.

The display unit 180 displays an operation state and an error mode of the air conditioner according to the display control signal of the controller 120.

Hereinafter, the operation process and the effect of the air conditioner and the control method configured as described above will be described.

6 is an operation flowchart of a control method of an air conditioner according to the present invention.

First, operation information such as a driving mode (cooling or heating operation) selected by a user, a set temperature, a surround airflow pattern, and the like are input to the controller 120 through the input unit 100 (S200).

Accordingly, the control unit 120 determines whether the driving is on (S210), and if the driving is on, controls the blade driving unit 170 according to the selected surround airflow pattern so that the left and right blades installed in the left and right discharge ports 14a and 14b of the indoor unit 10 are controlled. Rotate (16a, 16a).

For example, when the user selects the surround airflow pattern No. 1, the blade driving unit 170 swings the left blade 16a and the right blade 16b in the same direction.

On the other hand, when the user selects the surround airflow pattern ②, the blade driver 170 swings the left blade 16a and the right blade 16b in opposite directions.

In addition, when the user selects the surround airflow pattern ③, the blade driving unit 170 fixes the left blade 16a and swings the right blade 16b.

In addition, when the user selects the surround airflow pattern ④, the blade driver 170 swings the left blade 16a and fixes the right blade 16b.

In addition, when the user selects a surround airflow pattern ⑤, the blade driving unit 170 fixes the left blade 16a and the right blade 16b.

In addition, when the user selects a surround airflow pattern ⑥, the blade driving unit 170 closes the left blade 16a and swings only the right blade 16b.

In addition, when the user selects a surround airflow pattern ⑦, the blade driving unit 170 swings only the left blade 16a and closes the right blade 16b.

The fixed and swing angles of the left and right blades 16a and 16b according to the surround airflow pattern may be arbitrarily adjusted by the user or independently controlled at a predetermined angle by the controller 120.

Meanwhile, the present invention has been described with seven examples of user-selected surround airflow patterns. However, the surround airflow pattern of the present invention is not limited thereto, and the left blade 16a is closed and the right blade 16b is fixed. It can be modified in various forms.

In this way, the airflow control to independently operate the left and right blades (16a, 16b) according to the user-selected surround airflow pattern to send the direction of the air discharged through the discharge port (14a, 14b) farther and to mix the room temperature It is possible to increase the speed (S220).

At the same time, the controller 120 variably controls the frequency of the compressor 52 by the amount of change in the room temperature and the set temperature using the purge table corresponding to the air flow control of the left and right blades 16a and 16b (S230). The air volume of the indoor fans 22a and 22b is variably controlled according to the frequency change amount of 52 (S240).

The frequency of the compressor 52 according to the airflow control of the left and right blades 16a and 16b and the air volume control of the indoor fans 22a and 22b will be described with reference to FIGS. 7 to 10 according to the respective surround airflow patterns.

In order to explain the operation of the present invention, the minimum frequency at which the compressor 52 operates at the minimum is called Cf_min, the maximum frequency at which the compressor 52 operates at the maximum is called Cf_max, and the frequency of the current compressor 52 is set at Cf (N). ), The frequency of the compressor 52 immediately before (N-1) is called Cf (N-1), and the difference between the current room temperature and the set temperature is called E (N), and the fixed time (△ T) The difference between the previous current room temperature and the set temperature is ΔE (N), and the frequency change of the compressor 52 obtained as a function of E (N) and ΔE (N) is ΔCf, The maximum air volume of the indoor fans 22a, 22b that changes according to the frequency change amount ΔCf of (52) is Q_max, and the indoor fans 22a, 22b that change according to the frequency change amount ΔCf value of the compressor 52. The intermediate air volume is referred to as Q_min, and the minimum air volume of the indoor fans 22a and 22b that changes according to the frequency change amount? Cf of the compressor 52 is referred to as Q_min.

First, when the user selects a surround airflow pattern of ① and ②, the left blade 16a and the right blade 16b swing in the same direction or in the opposite direction, so the air volume of the indoor fans 22a and 22b and the frequency of the compressor 52 are different. Is controlled as shown in FIG. 7.

In FIG. 7, when the left blade 16a and the right blade 16b start swinging, the indoor fans 22a and 22b are driven at the maximum air volume Q_max, and the compressor 52 is also fixed at the maximum frequency Cf_max for a predetermined time. Run for about 5 minutes.

When the initial surround airflow pattern is selected, the indoor temperature reaches a user-set temperature within a short time. After a predetermined time, the control unit 120 opens the purge table corresponding to the airflow control of the left and right blades 16a and 16b. By using the variable control of the frequency of the compressor 52 in accordance with the change amount of the room temperature and the set temperature.

When the frequency of the compressor 52 is changed, the air volume of the indoor fans 22a and 22b is also linked to it so that the user can feel the surround sensation effect by the surround airflow control according to the swing of the left and right blades 16a and 16b. do.

On the other hand, if the user-selected surround airflow pattern is ③, ④, any one of the left blade (16a) and the right blade (16b) is fixed and the other swings so that the air flow rate and the compressor 52 of the indoor fan (22a, 22b) The frequency of is controlled as shown in FIG.

In FIG. 8, when either one of the left blade 16a and the right blade 16b is fixed and the other starts swinging, the indoor fans 22a and 22b are driven at the maximum air volume Q_max as in FIG. (52) is also driven for a predetermined time (about 5 minutes) at the maximum frequency (Cf_max).

As shown in FIG. 7, when the initial surround airflow pattern is selected, the indoor temperature reaches a user-set temperature within a short time. After a predetermined time, the controller 120 corresponds to the airflow control of the left and right blades 16a and 16b. Using the purge table, the frequency of the compressor 52 is variably controlled according to the change amount of the room temperature and the set temperature.

In addition, when the user selects the surround airflow pattern ⑤, since the left blade 16a and the right blade 16b are fixed, the air flow rates of the indoor fans 22a and 22b and the frequency of the compressor 52 are shown in FIG. 9. As one controls.

In FIG. 9, when the left blade 16a and the right blade 16b are fixed, the indoor fans 22a and 22b are driven at the maximum air volume Q_max as in FIGS. 7 and 8, and the compressor 52 is also the maximum frequency ( Cf_max) for a predetermined time (about 5 minutes), and after a certain time, the controller 120 uses a purge table corresponding to the airflow control of the left and right blades 16a and 16b according to the change in the room temperature and the set temperature. The frequency of the compressor 52 is variably controlled.

Next, when the user selects the surround airflow patterns ⑥ and ⑦, one of the left blade 16a and the right blade 16b is closed and the other swings, so that the air volume of the indoor fans 22a and 22b and the air flow of the compressor 52 are changed. The frequency is controlled as shown in FIG.

In FIG. 10, when one of the left blade 16a and the right blade 16b is closed and the other starts swinging, the indoor fans 22a and 22b are driven at the maximum air volume Q_max as in FIGS. 7 to 9. In addition, the compressor 52 is also driven at a maximum frequency Cf_max for a predetermined time (about 5 minutes), and after a predetermined time, the control unit 120 uses a purge table corresponding to airflow control of the left and right blades 16a and 16b. The frequency of the compressor 52 is variably controlled according to the change amount of the room temperature and the set temperature.

In this way, by controlling the frequency of the compressor 52 and the air volume of the indoor fan chambers 22a and 22b according to the respective surround airflow patterns, it is possible to control the airflow and surround to change the capacity, thereby allowing the user to feel. It is possible to maximize the feeling of surround airflow.

Thereafter, when the user selects the driving off through the input unit 100, the controller 120 determines whether the driving is off (S250), and if not, the control unit 120 feeds back to the S220 to continue the surround driving.

On the other hand, when the operation is off, the control unit 120 moves the left and right blades 16a and 16b to a predetermined initial position (for example, the closing angle), and stops the indoor fans 22a and 22b and the compressor 52 to provide air conditioning. The operation is terminated by entering the standby mode.

According to the air conditioner and the control method according to the present invention as described above, it is possible to control a large space faster by controlling the direction of the air discharged by the surround discharge method having two discharge ports at multiple angles, the same The air-conditioning effect is high compared to the air conditioner of the capacity band.

In addition, the present invention has the effect that the user can feel the surround sensation efficiency by variably controlling the air volume of the indoor fan and the frequency of the compressor according to the surround air flow pattern while controlling the discharge direction of the air at various angles.

Claims (10)

In the air conditioner having a plurality of discharge port, each of the plurality of discharge port is provided with a blade for adjusting the discharge direction of air, An input unit which selects a surround airflow pattern in which the respective blades operate independently of each other so that a direction of air discharged through the plurality of discharge ports is controlled at various angles; And A controller for independently operating each blade according to the selected surround airflow pattern; Air Conditioner Included. delete The method of claim 1, And the control unit variably controls the frequency of the compressor based on an amount of change in the room temperature and the set temperature generated by the operation of each blade. The method of claim 1, Further comprising an indoor fan for controlling the air volume of the air discharged through the plurality of discharge ports, The controller is characterized in that for controlling the air volume of the indoor fan variable according to the frequency of the compressor. 5. The method of claim 4, And the control unit pre-stores a table indicating a relationship between the frequency of the compressor and the air volume of the indoor fan according to the operation pattern of each blade. delete In the control method of the air conditioner having a plurality of discharge ports, each of the plurality of discharge ports are provided with blades for adjusting the discharge direction of the air to control the discharge direction of the air to surround, Selecting a surround airflow pattern in which the respective blades operate independently of each other so that a direction of air discharged through the plurality of discharge ports is controlled at various angles; And Controlling the frequency of the compressor based on an amount of change in the room temperature and the set temperature generated by the operation of each blade while independently operating the respective blades according to the selected surround airflow pattern. Way. delete 8. The method of claim 7, And controlling the air volume of the indoor fan according to the frequency of the compressor. The method of claim 7, wherein In the surround airflow pattern having a table showing the correlation of the frequency of the compressor according to the operation pattern of each blade, the respective blades with reference to the table while operating each blade independently in accordance with the selected surround airflow pattern The control method of the air conditioner for controlling the frequency of the compressor at a frequency corresponding to the operation pattern.

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