KR20080065407A - Air conditioner - Google Patents

Abstract

An air conditioner is provided to employ first and second modes for an air purification operation, to determine a relative pollution degree of air when the air is polluted in the air purification operation, and to control purification units according to the determination result. An air conditioner includes a plurality of purification units(191-193), a sensor(172), and a controller(170). The purification unit purifies internal air and includes at least one filter. The sensor detects the pollution degree of the internal air. The controller drives the purification unit according to an input control command. The controller reads out the resistance and the output voltage of the sensor. The controller calculates a relative pollution degree of the air based on a pollution degree of air measured for a predetermined time when a pollution degree of air is raised.

Description

Air Conditioner {Air conditioner}

1 is a perspective view of an air inlet and an air outlet of an air conditioner according to an embodiment of the present invention open;

2 is a front view of the air inlet and the air outlet of the air conditioner according to the embodiment of the present invention opened;

3 is a longitudinal sectional view of an embodiment of an air conditioner according to the present invention;

4 is a perspective view when the front of the air conditioner according to the embodiment of the present invention is opened forward and the inner bottom is opened;

5 is a schematic exploded perspective view of an embodiment of an air conditioner according to the present invention;

6 is a block diagram of an air conditioner according to the present invention;

7 is a flowchart illustrating a process of a clean operation mode according to the present invention;

8 is a view showing a display unit according to the present invention.

The present invention relates to an indoor air conditioner, wherein the air cleaning operation is performed by dividing the air cleaning operation into 1 mode and 2 modes, and when the air is polluted during the air cleaning operation, the air conditioner determines the relative pollution degree and controls the purifying unit accordingly. It is about.

Hereinafter, the problems of the air conditioner according to the related art are as follows.

The air conditioner is used to cool the room or purify the air by using a cooling cycle consisting of a compressor, a condenser, an expansion mechanism, and an evaporator to create a more comfortable indoor environment for the user.

The separate type is to install a cooling / heat dissipation device in the indoor unit and a heat dissipation / cooling and compression device in the outdoor unit to connect the indoor unit and the outdoor unit separated by a refrigerant pipe, and the integral type is integrated into the wall of the house by integrating the function of cooling heat dissipation It was installed directly by drilling holes or hanging the device in the window.

In addition, in recent years, air conditioners can be used not only for indoor cooling but also for switching the cooling cycle to enable indoor heating throughout the four seasons, and at least one filter may be used as an air purifier.

At this time, when the interior is polluted during the clean air operation, the indoor pollution degree is immediately increased and a high voltage is applied to the filter. Accordingly, the system may become unstable due to a sudden increase in the driving voltage.

In addition, as the air clean operation proceeds, driving of the display unit to visually confirm the change in the pollution degree or the change in the cleanness level of the indoor air is required.

The present invention has been proposed in order to solve the above problems of the prior art, and to provide an air conditioner in which unnecessary driving control against instantaneous indoor contamination is not performed during the air cleaning operation.

In order to solve the above problems, a purifying unit equipped with at least one filter for purifying the indoor air of the present invention, a sensor unit for detecting the pollution degree of the indoor air, and driving the purifying unit according to the input control command, And a control unit for reading the resistance value and the output voltage of the sensor unit, wherein the control unit calculates a relative pollution degree by reflecting the air pollution degree for at least a predetermined time when the air pollution degree increases during operation, and drives the purification unit accordingly. Characterized in that.

A display unit for displaying the indoor air cleanliness purified by the purification unit is further included, and the air cleanliness is displayed as a numerical value or a graph.

The display unit is a liquid crystal display unit provided on the exterior of the indoor unit main body, or one of the liquid crystal display unit of the remote controller for transmitting a control signal to the indoor unit.

The air cleaning operation is divided and controlled into a first mode and a second mode, and the control unit reads the resistance value of the sensor unit during the first mode to calculate a reference resistance value, and the reference of the previous period during the second mode. Set the air pollution class according to the rate of change of the new resistance value read over the next period of resistance.

The reference resistance value of the previous cycle is updated in the next cycle, and when the new resistance value is greater than the previous reference resistance value, the controller updates the reference resistance value to the new resistance value, and the new resistance value is the previous reference resistance value. If larger, the reference resistance value is updated to the average value of the highest resistance value and the previous reference resistance value during at least two cycles.

If the off time continues for more than a predetermined time during the progress of the second section, the controller restarts the first section to calculate a new initial cleanliness.

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

1 is a perspective view of an air inlet and an air outlet of an air conditioner according to an embodiment of the present invention is opened, and FIG. 2 is a front view of the air inlet and air outlet of an embodiment of an air conditioner according to the present invention.

1 and 2, the air conditioner according to the present embodiment, the air inlet (3) and the air discharge port (5) (6) so as to be discharged after the air is sucked through the main body (1) (7) is formed.

The main body 1 includes an air conditioner 10 having air inlets 3, 4, and air outlets 5, 6, and 7, and an air conditioner so as to open part or all of the front surface of the air conditioner 10. 10) and a front panel 20 rotatably connected forward.

Here, the air conditioner 10 is a type of casing in which an air conditioner is installed and a heat exchanger for air conditioning is installed therein. The base 30, the cabinet 40, and the upper panel 50 are provided. It is configured to include a lower panel 70, 80.

The base 30 is disposed so that the front panel 20 is placed side by side on the front side of the air conditioner 10 so that the front panel 20 does not have a large gap between the bottom of the front panel 20 and the floor surface S of the room. The stepped part 32 protrudes from the lower part of 20.

The upper panel 50 has a left air outlet 5 formed at a left side thereof, a right air outlet 6 formed at a right side thereof, and an upper air outlet 7 formed at at least one of an upper front side and an upper surface thereof.

Hereinafter, the upper panel 50 will be described by limiting the upper air discharge port 7 formed in the upper surface portion.

The left side air outlet vane 51 which opens and closes the left side air outlet 5 and adjusts the wind direction of the air discharged through the left side air outlet 5 is rotatably disposed and the left side air outlet vane A left air outlet vane motor for rotating the 7 51 is provided.

The right side air outlet vane 52 which opens and closes the right air outlet 6 and adjusts the wind direction of the air discharged through the right air outlet 6 is rotatably disposed and the right air outlet vane. A right air outlet vane motor for rotating 52 is provided.

The upper panel 50 has an upper discharge port vane 53 rotatably arranged to open and close the upper air discharge port 7 and adjust the wind direction of the air discharged through the upper air discharge port 7, and the upper air discharge vane An upper air outlet vane motor for rotating the 53 is provided.

The lower panel 70, 80 is disposed between the left side of the upper panel 50 and the base 30 and the left lower panel 70 on which the left air inlet 3 is formed, and the right side of the upper panel 50. And a lower right panel 80 disposed between the base 30 and the right air inlet 4.

On the left lower panel 70, a left air inlet vane 71 for opening and closing the left air inlet 3 is rotatably disposed, and a left air inlet vane motor for rotating the left air inlet vane 71 is installed. A left filter 72 is mounted to purify the air sucked into the air intake port 3.

In the lower right panel 80, a right air inlet vane 81 for opening and closing the right air inlet 4 is rotatably disposed, and a left air inlet vane motor for rotating the left air inlet vane 81 is installed. A right filter 82 is mounted to purify the air sucked into the air intake 4.

Reference numeral 27 shown in Figs. 1 and 2 is a display unit for displaying various types of information such as operation information of the air conditioner, and may be selectively fixedly mounted on one side of various positions of the front panel 20. It is also possible to arrange | position so that the position movement to 20 is possible.

Figure 3 is a longitudinal cross-sectional view of one embodiment of the air conditioner according to the invention, Figure 4 is a perspective view when the front portion of the air conditioner according to the embodiment of the present invention opened forward and the inner bottom is opened, Figure 5 is in the present invention A schematic exploded perspective view of an air conditioner according to one embodiment.

The front panel 20 is a kind of door installed to open or close part or all of the front surface of the air conditioning unit 10, and is formed at a height of opening and closing from the front upper part of the base 30 to the upper end of the front part of the upper panel 50. As shown in FIG. 3, the glass 21 disposed at the front, the glass panel 22 disposed at the rear of the glass 21, and the cover 23 for assembling the glass 21 and the glass panel 22 are assembled. ).

The cover 23 surrounds the edges of the glass 21 and the glass panel 22 and is fastened to the glass panel 22 by a fastening means such as a hook or a fastening bolt.

The cover 23 has a cross-section having a substantially 'c' shape, and covers the four left, right, top, and bottom edges of the glass 21 and the glass panel 22, respectively. It consists of two covers, and is disposed in an approximately 'ㅁ' shape as a whole along the edges of the glass 21 and the glass panel 22.

The front panel 20 may be formed on the back of the glass 21, the opaque portion 24 having a predetermined color or pattern by printing, or the opaque sheet may be separately attached to the back of the glass 21. The following description will be given of the opaque part 24.

The front panel 20 is hinged to the front side of each of the air conditioning unit 10 so that the upper and lower portions are rotated so as to protrude forward toward one side of the left and right.

As shown in FIG. 4, the front panel 20 is connected to the air conditioning unit 10, in particular, the upper panel 50, by a coupling mechanism at approximately one of the left and right sides, and the coupling mechanism is the front panel 50. It is made of a structure that operates smoothly without opening and closing suddenly.

The connection mechanism consists of a slide member 25 slidably connected to one side of the front panel 20 and the upper panel 50 and hinged to the other side of the front panel 20 and the upper panel 50, and the front panel. One side of the 20 and the upper panel 50 is formed with a hinge connection portion 54 to which the slide member 25 is rotatably hinged, and the other side of the front panel 20 and the upper panel 50 includes a slide member ( A slide guide 26 through which 25 is guided is formed.

The front panel 20 slides along the slide guide portion 26 while the slide member 25 is rotated about the hinge connection portion 54 while the front panel 20 is rotated, and a frictional force is applied to the slide member 25 when the slide member 25 slides. The panel 20 is limited by the frictional force of the slide member 25 its rapid opening and closing.

That is, the front panel 20 is connected to the upper, middle and lower portions of one side of the left and right sides to the air conditioning unit 10, respectively.

When the display unit 27 illustrated in FIGS. 1 and 2 is disposed to be movable, the front panel 20 includes a display unit moving mechanism 28 that is directly connected to the display unit 27 to move the display unit 27. do.

The display part moving mechanism 28 is also applicable to the manual moving mechanism which moves the display part 27, and the automatic moving mechanism which includes a motor, a gear, etc., moves the display part 27 automatically. Of course, it is applicable.

Meanwhile, as illustrated in FIGS. 3 and 4, the front panel 20 is provided with a remote controller box 29 in which a remote controller R for remotely operating the air conditioner is stored.

The remote control box 29 is provided on the rear side of the front panel 20 so that the front panel 20 is not exposed to the outside of the main body 1 when the front panel 20 is closed.

The remote control box 29 constitutes a front panel assembly together with the display portion 27, the display moving mechanism 28 and the front panel 20.

Here, the remote controller box 29 is the insertion / withdrawal of the remote controller (R) when the insertion / withdrawal direction of the remote controller (R) is perpendicular to the vertical direction, that is, parallel to the vertical direction of the front panel (20). In operation, the remote controller R may be in contact with the rear surface of the front panel 20 so that the appearance of the remote controller R is easily damaged and its insertion / retraction operation is not easy, while the insertion / removal of the remote controller R is easy. When the drawing direction is made to be inclined in the vertical direction, that is, when not parallel to the vertical length direction of the front panel 20, the damage of the remote controller R is minimized and the insertion / drawing operation is facilitated. R) is inserted in the downward inclined direction toward the lower rear side of the front panel 20 and is drawn out in the upward inclined direction toward the rear upper portion of the front panel 20.

 Meanwhile, as shown in FIGS. 3 to 5, a lower hinge bracket 34 having a lower hinge bracket 34 rotatably connected to one side of the left and right sides of the front panel 20 may be connected to a fastening member such as a fastening bolt. Is installed by

The base 30 is provided with a lower bracket cover 35 that covers a part of the lower hinge bracket 34, in particular, a part fastened to the base 30.

The base 30 is provided with a box attachment / detachment portion 36 in which the dust box 95 of the cleaning mechanism 90 described later is slide-attached in the front-rear direction.

As shown in FIG. 5, the cabinet 40 is vertically disposed above and behind the rear part of the base 30, and the front and top and bottom surfaces are opened, and the left and right side parts 41 and 42 are formed on the rear part ( 43) is formed to be inclined.

The upper panel 44 is disposed above the cabinet 40.

As illustrated in FIG. 5, the upper panel 50 has a lower surface and a rear surface, and left and right side portions 55 and 56 are formed to be inclined with the front portion 57, and the upper surface portion 58 is a front portion. It is formed orthogonal to (57).

3 to 5, the upper hinge bracket 59, which is connected to the lower left and right sides of the front panel 20 so as to be rotatable, is installed by fastening members such as bolts. do.

The upper panel 50 is provided with an upper bracket cover 60 covering a part of the upper hinge bracket 58.

The left lower panel 70 and the right lower panel 80 are provided with a filter frame 73 on which the left filter 72 and the right filter 82 are fixed.

Meanwhile, as illustrated in FIGS. 3 to 5, the air conditioning unit 10 is provided with a cleaning unit 90 for automatically cleaning the left and right filters 72 and 82.

As shown in FIG. 4, the cleaning unit 90 is disposed on the left lower panel 70 and the right lower panel 80 so as to move along the left and right filters 72 and 82, respectively. The filter kit 91 collecting dust of the right filter 72 and 82 and the filter kit 91 and the dust hose 92 are connected to each other to filter the dust of the left and right suction filters 92. A kit blower 93 for allowing foreign matter to be sucked in, a cyclone 94 for separating the suctioned filter foreign matter and air, a dust box 95 for collecting the filter foreign matter separated from the cyclone 94, and the filter And a kit control box 96 for controlling the cleaning unit.

3 to 5, the air conditioner 10 includes a heat exchanger 100 that heats / cools air using a refrigerant and external air of the air conditioner 10. The blower 110 is sucked into the inside of the heat exchanger 100 and then blown to the outside of the air conditioning unit 10.

The heat exchanger 100 is mounted to at least one of the cabinet 50 and the blower 110 so as to be inclined between the top of the cabinet 40 and the upper panel 50.

The blower 110 is mounted to the cabinet 40 to be located below the heat exchanger 100.

The blower 110 includes a blower motor 111 mounted at a lower portion of the cabinet 40, a blower fan 112 connected to the blower motor 111, and an opening 113 formed at a front surface thereof, and a discharge portion at an upper surface thereof. 114 is formed and includes a fan housing 115 mounted to the cabinet 40 and an orifice 116 disposed at the front of the fan housing 115.

A drain pan 117 is formed on the top of the fan housing 115 to receive the condensed water dropped from the heat exchanger 100 and to lift and support the heat exchanger 100.

The orifice 116 has an air inlet 116A formed at the center thereof to allow air to be sucked into the fan housing 115.

On the other hand, the air conditioning unit 10, the opening 30 is formed between the base 30, the upper panel 50 and the left and right lower panels 70, 80, the purification described later through the opening 160 The unit blower unit 191, 192, 193 can be moved in and out to clean or replace the purifying units 191, 192, 193, and the kit blower 93 installed at the inner lower portion of the air conditioning unit 10 Various components, such as the kit control box 96, are serviced.

The air conditioning unit 10 is provided with an inner cover 162 that blocks the opening 160 to block the opening 160 and to enhance the aesthetics and to increase safety when the front panel 20 is opened forward.

The inner cover 162 is preferably assembled to the lower part of the upper panel 50 by fastening means such as fastening bolts.

The inner cover 162 is formed with a box avoiding groove 164 recessed backward to avoid the remote control box 29 so that a part of the remote control box 29 is inserted when the front panel 20 is closed.

On the other hand, the air conditioning unit 10 is provided with a control unit 170 for controlling the various electrical components for controlling the air conditioner as shown in Figs.

The control unit 170 is connected to the kit control box 96, the blower motor 111, the display unit 27 and the like by a cable such as an electric wire, the front panel 20 is opened to the front and the inner cover 160 to the air conditioning unit 10 When it is separated from the ()) it is preferably disposed at a position exposed to the outside through the opening 160, for example, the front upper portion of the blower (110).

In addition, a purifying mechanism 180 is installed inside the main body 1, in particular, the air conditioner 10 to purify the air sucked into the orifice 116 when the blowing fan 112 rotates.

3 to 5, at least one purifying unit 191, 192, 193 and at least one purifying unit 191, 192, 193 are detached from each other. And a purifying unit holder 194.

The purifying units 191,192 and 193 are preferably arranged so that different kinds of purifying step by step purify the air, and are not limited to the kind, but are pre-filters for filtering large foreign substances in the air, and fine. Hepa filter, a high-performance filter to filter dust, nano filter with excellent deodorization and antibacterial performance, optional filter such as optional yellow dust filter or deodorization filter, and a combination of nonwoven fabric and a plurality of polyurethanes having different densities At least one of a filter and a plasma dust filter for ionizing and collecting dust.

Hereinafter, the purifying units 191, 192, 193 include an optional filter 191, such as a yellow dust filter or a deodorization filter, which is selectively mounted, a hepa filter 192 which is a high-performance filter that filters fine dust, and dust in the air. The electrostatic precipitating filter 193 to be ionized and collected is limited to being arranged in the front and rear order.

As shown in FIG. 3, the electrostatic precipitating filter 193 among the purifying units 191, 192, and 193 includes a power applying terminal 193 ′ receiving a high voltage power applied from the outside to the lower surface portion.

Purification unit holder 194 has a structure in which air is sucked through the front and left, right and top and bottom surfaces and discharged rearward through the rear surface.

The purifying unit holder 194 is a blower 110 during the inserting / drawing operation of the purifying unit 191, 192, 193 when the inserting / drawing direction of the purifying units 191, 192, 193 is vertical in the vertical direction. It may come into contact with the front surface of the drain pan 117 or the purifying unit 191, 192, 193 is not only easy to damage, but also the insertion / withdrawal operation is not easy, and the purifying unit 191, 192 ( While the insertion / draw direction of the 193 is horizontal in the front-rear direction, it is inconvenient to bend the waist for the insertion / drawout operation of the purification units 191, 192, 193, while the purification unit 191 ( When the insertion / drawing direction of the 192 and 193 is inclined in the up and down direction, damage to the purifying units 191 and 192 and 193 is prevented and the insertion / drawing operation is facilitated. ) 192 and 193 are inserted / drawn in an inclined direction.

Purification unit holder 194 is composed of a stationary body 200, and a rotating body 300 rotatably connected to the fixed body 200, the purifying unit 191, 192, 193 is detachable, The lower portion of the body 300 is hinged to the lower portion of the fixture 200.

The stationary body 200 is installed inside the main body 1, in particular, the air conditioning unit 10, and is located between the opening 160 of the air conditioning unit 10 and the air intake unit 116A of the blower 110. It is installed as possible.

That is, the fixed body 200 is installed at the front of the blower 110 to be located in front of the air inlet 116A of the blower 110.

As shown in FIG. 3, the rotating body 300 is provided with a power supply terminal 343 that contacts the dust collecting filter terminal 193 ′ of the electric dust collecting filter 193 and supplies high voltage power.

The power supply terminal 343 is mounted on the terminal holder 344 detachably attached to the lower portion of the pivot 300 by a hook or the like.

Looking at the function of the air conditioner configured as described above through the block diagram of FIG.

First, the exterior of the indoor unit is provided with an input unit 12 including at least one button. Of course, the input unit may be integrated with the touch screen display unit 27.

As such, a control command may be input through the indoor unit main body, or a control command may be input from the remote controller through the communication unit 171.

In this case, the communication unit 171 is based on infrared communication, but in addition, a wireless communication modem using a frequency band, such as Bluetooth, WLAN may be applied.

In addition, the controller 170 is connected to the sensor unit 172 for detecting the indoor air pollution degree. The sensor unit includes at least one sensor for air conditioning or air purification, and in the present embodiment, the sensor unit may be implemented as a gas sensor that detects the amount of carbon dioxide, carbon monoxide, or oxygen in the indoor air. When adsorbed, SnO ₂ , ZnO, Fe ₂ O ₃ semiconducting gas sensors can be used that utilize the change in their electrical resistance. In addition, a contact combustion sensor that converts and detects the reaction heat generated by the reaction of a combustible gas such as a hydrocarbon with oxygen may be used.

The control unit 170 performs cooling / heating by controlling the driving of the compressor and the indoor fan according to the difference between the room temperature and the desired temperature, and controlling the driving of the purifying unit and the indoor fan according to the detection of contamination by the sensor unit 172. do.

That is, the output voltage of the purification unit is changed by adjusting and boosting the voltage applied to the purification units 191 to 193 in multiple stages according to the indoor pollution degree. In addition, the indoor fan rotation speed is changed by adjusting the voltage applied to the indoor fan in multiple stages so that the rotation speed is increased in proportion to the voltage applied to the purification unit.

On the other hand, the display unit 27 is illustrated as a liquid crystal display, it may be formed on the exterior of the indoor unit body, or may be a liquid crystal display unit provided in the remote controller for transmitting a control signal to the indoor unit.

The liquid crystal display includes a panel formed by filling a liquid crystal between two glass plates, and a backlight positioned behind the panel to emit light. That is, the molecular structure of the liquid crystal is changed by supplying a voltage by connecting an electrode to each cell constituting the panel, and is displayed by adjusting the amount of light coming from the backlight.

In this case, the liquid crystal display 27 may be divided into a positive type and a negative type by passing or blocking light of the backlight by using polarized light. The light of the backlight is supplied by supplying a voltage to an electrode. In the positive way of blocking, the background is bright and the letters or numbers are black. In the negative way of passing the light from the backlight, the background is dark and the letters or numbers are light.

The control unit 170 displays a menu, an indoor temperature, a desired temperature, as well as a current driving progress state through the display unit 27, so that the user can easily grasp the progress state and provide convenience of operation.

In the air conditioner configured as described above, the process of the air cleaning operation by the controller 170 will be described with reference to FIG. 7 as follows.

<< S1, S2, S3 >>

The air cleaning operation is divided into a first section and a second section according to the driving progress state.

The first section is a section in which the resistance value is set as the reference resistance value for a predetermined time after the power is applied (the time when the heater in the gas sensor is heated to reach a stable point, which is illustrated as about 2 minutes). The reference resistance is called R0.

<< S4, S5, S6 >>

When a predetermined time for setting the reference resistance value elapses, the display enters the second section. In the second section, the first cleanliness value is determined and displayed on the display unit according to the output voltage of the reference resistor during the first section.

Output voltage Initial cleanliness level 1V or less 5 1 ~ 1.5V 4 1.5 ~ 2 3 2 ~ 2.5 2 2. 5 or more One

At this time, if the air cleaning operation is started and the off state continues for a predetermined time (10 minutes) during the progress of the second section through the first section, the reference resistance obtained in the first section is not used. After restarting, the first section is restarted to calculate a new reference resistor R0. This is to prevent the contamination level from being displayed as low by the previous reference resistance value even though the contamination occurred while the air cleaning operation was turned off.

In addition, during the second section, indoor air is sensed every predetermined cycle (exemplified in units of 2 seconds) to determine indoor pollution degree by comparing relative values, and classify pollution degree.

<< S6 >>

On the other hand, the reference resistance value determined in the first section is changed by the air cleaning operation, and thus the reference resistance value R0 is updated to a new value during the second section, which is calculated as follows.

Since the initial reference resistance value does not exist during the first operation of the air conditioner, the resistance value of the first sensor unit obtained after the first section has elapsed is set as the reference resistance value R0. At this time, when the output voltage value of the sensor unit is less than 1V or the indoor pollution is so severe that the output voltage value is more than 4V, the resistance value when the output voltage is 1.8V is set as the reference resistance value.

When the new resistance value of the sensor unit according to the air cleaning operation is Rs, when the Rs is larger than the reference resistance value R0, it is determined that the indoor air is clean, and R0 is updated to the new resistance value Rs.

In other words, when the state where the new resistance value Rs is smaller than the reference resistance R0 continues, it is determined that the indoor air is contaminated, and the output voltage of the sensor unit is obtained every predetermined time period (for example, 10 minutes). That is, the control unit reads the output voltage of the sensor unit at predetermined time periods, and among the output voltages for three cycles (for example, 30 minutes), the minimum voltage value (voltage value when the indoor air cleanness is the highest) and reference resistance The average voltage of the voltage value applied to R0 is calculated, and R0 is updated with this value.

That is, when the air is cleaned after the air cleaning operation is performed, the reference resistance value R0 is updated to the resistance value Rs (higher than R0) of the newly detected gas sensor unit, and the air pollution becomes more severe after the air cleaning operation is performed. (Rs is lower than R0), instead of replacing Rs with the reference resistance, R0 is updated with a new value that reflects the output voltage of the last three cycles and the output voltage of the previous reference resistor.

If the reference resistance is immediately replaced by Rs because the air pollution has become more severe, the level of indoor pollution will increase sharply against instantaneous air pollution, and the output voltage to the purification unit will also increase rapidly, resulting in unstable operation. .

However, if the reference resistance value is updated to reflect the output voltage during the last three cycles as in the present invention, even if there is an instant air pollution, it is determined that it is contaminated by a relatively arbitrary amount compared to the air pollution degree recently, The output voltage to the purification unit will only be elevated by a relatively contaminated level.

That is, in the present invention, even when the room is polluted momentarily during the air cleaning operation, the purification unit is controlled based on the relative pollution degree, so that stable voltage driving is possible.

In addition, even if the room is polluted at the moment, since it is not immediately reflected, display that is unpleasant to the user, such as increasing air pollution or decreasing air cleanness, is not performed.

As mentioned above, the reference resistance value R0 is updated, and the grade of the indoor pollution degree is calculated through mutual comparison with the newly acquired Rs from the sensor unit.

<< S7, S8 >>

That is, the grade of the indoor pollution degree is determined by determining the resistance change rate (Rs / R0) of the sensor unit, and refer to [Table 1] below. At this time, if the output voltage of the sensor unit is 4V or more, the pollution degree is set to [strong].

As shown in Table 1, the indoor pollution degree is calculated according to the resistance change rate (Rs / R0). In this embodiment, the pollution degree is illustrated as five grades, and the first grade is about, and the second grade is about. ], Grade 3 is [Medium], Grade 4 is [Medium Steel], Grade 5 is [Strong].

TABLE 1

Rs / R0 Pollution Degree 0.92 or more Grade 1 0.87-0.92 Grade 2 0.80-0.87 Grade 3 0.73-0.80 Grade 4 Less than 0.73 Grade 5

In addition, when the percentage of the resistance change rate is called Rate,

Rate = resistance change rate (Rs / R0) * 100.

The contamination level is determined using this Rate value, and ultimately, the air cleanliness level is determined based on the pollution level. At this time, the formula for calculating the pollution degree according to the range of the rate value is applied differently.

If 0≤b <a≤100,

When Rate> a, the contamination level = 10 + (100-Rate) * 100/58,

when b <Rate ≤ a, the contamination level = 36 + (a -Rate) * 100/63,

If rate ≤ b, the contamination value = 63 + (b-Rate) * 100/52.

The contamination level calculated in this way is within the range of 10 to 90.

<< S9, S10 >>

The cleanliness level is calculated based on the contamination level based on Table 2, and the higher the cleanliness level, the less pollution of indoor air. In addition, the cleanliness level calculated as described above is displayed on the display unit as shown in FIG. 8.

TABLE 2

Pollution level  10-19  20-29  30-39  40-49  50-59  60-69  70-79  80-89  90  Cleanliness level  5  4  3  2  One

As shown in FIG. 8, the control unit displays an air cleanliness level as the air clean operation proceeds, and the air cleanliness level divided into five levels is displayed as a bar in the form of a numerical value and a bar graph. . Even if the value is not displayed, the user can easily grasp the indoor air freshness according to which level area the bar is stopped. In the embodiment of Figure 8 it is illustrated that the current air freshness level 5.

As described above with reference to the drawings illustrated with respect to the air conditioner of the present invention, the present invention is not limited by the embodiments and drawings disclosed herein, it can be applied within the scope of the technical spirit of the present invention is protected. .

When the air conditioner of the present invention configured as described above is contaminated with indoor air, the relative pollution degree is calculated by reflecting the air pollution degree for a predetermined period of time, and the purifying unit is controlled accordingly, so that the air conditioner is immediately driven by instantaneous air pollution. Since the voltage does not rise, more stable driving is possible.

In addition, since the indoor pollution degree is not displayed for the instant indoor pollution or the air cleanness is not displayed, the user is not displeased.

Claims (6)

A purifying unit equipped with at least one filter for purifying indoor air; Sensor unit for detecting the pollution of the indoor air, A control unit for driving the purifying unit according to an input control command and reading a resistance value and an output voltage of the sensor unit; And the control unit calculates a relative pollution degree by reflecting the air pollution degree for at least a predetermined time when the air pollution degree increases during operation, and accordingly controls driving of the purifying unit. In claim 1, It further includes a display unit for displaying the indoor air cleanliness purified by the purification unit, The air conditioner is characterized in that displayed on the numerical value or graph. In claim 2, The display unit is an air conditioner, characterized in that the liquid crystal display provided on the exterior of the indoor unit, or one of the liquid crystal display of the remote controller for transmitting a control signal to the indoor unit. In claim 1, The air cleaning operation is divided and controlled into a first mode and a second mode, The control unit calculates a reference resistance value by reading the resistance value of the sensor unit during the first mode, And setting the air pollution degree according to the rate of change of the new resistance value in the next period with respect to the reference resistance value of the previous period during the second mode. In claim 4, The reference resistance value of the previous cycle is updated in the next cycle. The controller updates the reference resistance value with the new resistance value when the new resistance value is larger than the previous reference resistance value. And when the new resistance value is larger than the previous reference resistance value, updating the reference resistance value with an average of the highest resistance value and the previous reference resistance value for at least two cycles. In claim 4, The control unit exceeds the predetermined time during the progress of the second section, the off time If so, characterized in that the control to restart from the first section.

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