JP2012202638A - Air conditioner indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner indoor unit that can improve detection accuracy by detecting a contamination degree by reliably selecting a place where air flow is generated, without being affected by the air flow associated with air conditioning operation.SOLUTION: A gas sensor to detect a contamination degree of indoor air and a contamination degree display portion to display the contamination degree of the indoor air are provided in the side portion of an air outlet 6 so as to be lined up each other. An air inflow hole for leading the indoor air to the gas sensor is provided at a portion spaced apart from the air outlet. An air outflow hole is provided in the vicinity of the air outlet in the front face of the air conditioner, the air outflow hole allowing the indoor air passed through a demarcated portion to a ventilation passage 9 which connects the air inlets 5a, 5b and the air outlet 6 through the gas sensor from the air inflow hole to flow to the outside from the air conditioner body 4.

Description

  Embodiments described herein relate generally to an air conditioner indoor unit.

  In an air conditioner composed of an outdoor unit and an indoor unit, an indoor unit main body constituting the indoor unit is provided with an indoor air suction port and a blowout port, and the ventilation path in the indoor unit main body communicates with the suction port and the blowout port. A heat exchanger and a blower are arranged in When this blower is driven, heat exchange air flows from the suction port through the heat exchanger to the ventilation path extending to the blowout port.

  By the way, a recent indoor unit has a gas sensor (contamination level detection) that detects the degree of contamination, which is the concentration of gas in the air, such as odor components contained in indoor air and odor components attached to curtains, furniture, etc. There is one with means. This gas sensor was attached to a control board arranged in the indoor unit main body.

Japanese Patent No. 4209971

  In other words, the control board to which the gas sensor is attached is disposed at a position where a sufficient amount of room air is guided, such as the central portion of the suction port. For this reason, this time, the air flow accompanying the air conditioning operation, such as a setting change of the air flow rate, is greatly affected, and the detection accuracy is not stable.

  For these reasons, the degree of contamination can be detected by selecting a place where the indoor air flow can be taken in reliably without being affected by the change in the air flow rate due to the air conditioning operation, thereby improving the detection accuracy. An air conditioner indoor unit is desired.

  In the present embodiment, the indoor unit main body is provided with a room air inlet and outlet, and a heat exchanger and a blower are arranged in the ventilation path in the indoor unit main body communicating with the inlet and outlet, and the side of the outlet A dirty degree detecting means for detecting the degree of indoor air contamination and a dirty degree indicating means for displaying the degree of indoor air are provided side by side on the side, and an air inflow hole for guiding the indoor air is blown out to the dirty degree detecting means. Provided in a part separated from the mouth, the indoor air passing through the part separated from the ventilation path from the air inflow hole to the part near the outlet on the front surface of the indoor unit body from the air inlet through the outside of the indoor unit body An air outflow hole was provided to allow the air to flow out.

The longitudinal cross-sectional view of the indoor unit of the air conditioner based on this embodiment. The external appearance perspective view at the time of the air conditioning driving | operation stop of an indoor unit based on the embodiment. The external appearance perspective view in the air conditioning driving | operation of the indoor unit based on the embodiment. The perspective view which expanded a part of indoor unit based on the embodiment. The front view of the contamination degree detection display body based on the embodiment. The external appearance perspective view of the dirt degree detection display body based on the embodiment. FIG. 6 is a diagram for explaining a contamination level display of a contamination level display unit according to the embodiment. The external appearance perspective view of the electrostatic atomization means based on the embodiment. The figure explaining the effect | action of the electrostatic atomization means based on the embodiment. The perspective view which looked at the filter frame which comprises the indoor unit main body based on the embodiment from the back side.

Hereinafter, the present embodiment will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner according to the present embodiment, and FIG. 2 is an external perspective view of the indoor unit of the same embodiment, both showing a state when the air conditioning operation is stopped. . FIG. 3 is an external perspective view of the indoor unit according to the embodiment, and FIG. 3 is an enlarged perspective view of a main part of the indoor unit, and all show a state during an air conditioning operation.

  In the indoor unit 1, an indoor unit main body 4 that is a casing is configured by a rear plate main body 2 that is attached and fixed to an indoor wall surface and a front panel 3 that is combined with the front surface of the rear plate main body 2. The front panel 3 constitutes the front and top surfaces of the indoor unit main body 4 and the left and right side housings, and the rear panel main body 2 serves as both the mounting part for the components housed inside and the back of the indoor unit main body 4. To do.

  On the upper surface and the front surface of the front panel 3, an upper suction port 5a for sucking and guiding room air and a front suction port 5b are opened. A decorative panel 3a is attached to the front surface of the front panel 3 over the entire left and right width, and the upper and lower sides of the decorative panel 3a form a front suction port 5b. The decorative panel 3a is openable and closable for performing maintenance such as cleaning of an air filter described later.

  A heat exchange air outlet 6 is provided at a lower portion of the front panel 3 constituting the indoor unit body 4. A wind direction guide body 7 including a horizontal louver that changes the vertical wind direction and a left and right louver that is provided integrally with the horizontal louver and changes the horizontal wind direction is attached to the outlet 6.

  In particular, between the one (right) side part of the outlet 6 and the one (right) side part of the front panel 3, about the upper half of the length of the outlet 6 in the vertical direction is a degree-of-contamination detection display described later. It is a space where the body Y is attached. The remaining lower half space is a space for mounting the human sensor S.

  The dirty degree detection display body Y detects the degree of dirt such as an odor component of room air, and notifies the resident by displaying according to the degree of dirt. The human sensor S changes the direction following the movement of the resident and detects the presence of the resident.

  A movable panel 3b is disposed across the entire width of the front panel 3 on the front side of the front suction port 5b and the outlet 6 below the decorative panel 3a. The movable panel 3b is provided with support shafts on the upper left and right sides, and the lower end side pivots forward to open and close, and the opening and closing operation of the movable panel 3b is performed by a motor or the like disposed in the indoor unit body 4. It is performed by the driving source.

  With the movable panel 3b closed, the front surface forms a curved surface continuous with the upper decorative panel 3a, and the front suction port 5b below the decorative panel 3a is closed. And the blower outlet 6 and the stain | pollution | contamination degree detection display body Y are almost closed, and it is hard to see from the resident below, and the design property is improved.

  When the movable panel 3b is rotated, the lower end side protrudes forward and becomes almost horizontal, the upper surface side opens the front suction port 5b, and the lower surface side opens the blowout port 6 and the contamination degree detection display body Y. The movable panel 3b partitions the suction-side ventilation path and the blowing-side ventilation path in the vertical direction, and can prevent a short circuit phenomenon in which the blowing air flows to the suction port 5b side.

  The above-described air filter F is disposed inside the upper and front suction ports 5a and 5b. Near the lower end of the air filter F, an air filter cleaning device 8 for cleaning the air filter F is disposed. The air filter cleaning device 8 mainly includes an air filter feed mechanism, a dust removing brush, and a dust box.

  The air filter feed mechanism is driven during the air filter cleaning operation and drives the air filter F to travel. And the lower end part of the air filter F is U-turned by the guide part provided in the back part of the indoor unit main body 4, and is moved to the original site | part.

  The dust removing brush rotates in conjunction with the movement of the air filter F, draws the dust adhering to the air filter F, and drops it into the dust box. The dust box is detachably attached to the indoor unit main body 4. When the dust full indication is displayed, the resident must remove it and discharge the internal dust to a trash box or the like.

  The indoor unit main body 4 forms an air passage 9 that communicates the upper and front suction ports 5a and 5b and the blowout port 6 in the internal space. The ventilation passage 9 is provided with a heat exchanger 10 formed in a substantially inverted V shape in a side view on the upstream side, and a cross-flow fan 11 constituting an indoor blower is provided on the downstream side.

  That is, the ventilation path 9 is driven from the upper and front suction ports 5a and 5b to the heat exchanger 10 by driving the cross-flow fan 11, and from the suction port side ventilation path 9a through which the indoor air is guided and from the heat exchanger 10. The air outlet 9 is formed from the air outlet 9b through which the heat exchange air, which is indoor air that has exchanged heat with the heat exchanger 10, is led.

Next, the contamination degree detection display body Y will be described in detail.
FIG. 5 is a front view of the contamination degree detection display body Y, and FIG. 6 is a perspective view of the contamination degree detection display body Y.
As described above, the contamination degree detection display body Y is provided at a side portion of the outlet 6 in the indoor unit body 4. As shown in FIGS. 3 and 4, the front surface is covered with a front display plate 13 made of a translucent plate.

  The contamination level detection display body Y includes a contamination level display unit (dirt level display means) 16 in which a plurality of (four) display LEDs 15 are arranged side by side in the left-right width direction, and the contamination level display unit 16. And a gas sensor (dirt degree detecting means) GS provided adjacent to one (right) side portion.

  The contamination level display unit 16 will be described below. Each LED 15 is disposed behind the front surface of the contamination level detection display body Y, and the vertical and horizontal peripheral surfaces thereof are reflective surface portions 18 that are obliquely expanded from the LED 15 toward the front surface. ing. From this, if LED15 light-emits, the light will be expanded by the reflective surface part 18, and will illuminate the front display board 13 brightly.

  However, the LED 15 on the one (left) side opposite to the gas sensor GS is positioned in front of the other plural (three) LEDs 15. Therefore, the area of the reflecting surface 18 on the peripheral surface of the LED 15 is narrower than the area of the reflecting surface 18 on the other peripheral surfaces of the LED 15. Even if all the LEDs 15 have the same illuminance, the illuminance for illuminating the front display panel 13 only by the LED 15 on one side is weak.

That is, the LED 15 on one side is provided as an “operation display lamp”, and the other plurality of LEDs 15 are provided as “dirty degree display lamps”.
As the “stain degree display lamp”, when the degree of dirt measured by the gas sensor GS is equal to or greater than a predetermined reference value, all the LEDs 15 are turned off. Within the predetermined reference value, when it is “large” (the degree of air contamination is large), one LED 15 is illuminated. When the degree of contamination is “medium”, the two LEDs 15 are illuminated.

  When the degree of contamination is the smallest (the degree of air contamination is small), the three LEDs 15 are illuminated. That is, the greater the number of LEDs 15 that are lit, the higher the cleanliness of the air.

  The gas sensor GS has a cylindrical shape and is a semiconductor gas sensor that detects the concentration of odor (gas system) that is the degree of contamination in the air. That is, a voltage is applied to the gas-sensitive material heated by the heater, and a change in resistance of the gas-sensitive material that comes into contact with the gas is taken out as a change in load resistance both-end output (voltage) provided in series with the gas-sensitive material. .

  The base end portion of the gas sensor GS is attached to and mounted on a print control board in the same manner as the LED 15. The front end of the gas sensor GS protrudes to the front side, and the peripheral surface is a rectangular recess 19. A hole (not shown) is provided in a part of the recessed portion 19 and faces the gas sensor GS.

  As the contamination degree detection display body Y, a back surface portion (not shown) is provided for the front surface portion 20a, the reflective surface portion 18 around the LED 15, the recessed portion 19 around the gas sensor GS, and the upper, lower, left and right surface portions 20b. A cavity portion is formed between the front surface portion 20a, the reflective surface portion 18, the recessed portion 19, and the upper, lower, left, and right surface portions 20b with respect to the back surface portion.

  An air inflow hole 22 is provided in the upper surface portion 20b, which is an upper portion of the recessed portion 19, and an air outflow hole 23 is provided in the front portion of the lower portion of the reflecting surface portion 18 on one side. Therefore, air is guided from the air inflow hole 22 to the cavity of the contamination degree detection display body Y, and enters the recess 19 from the hole provided in the recess 19 to cover the gas sensor GS.

  And it is guide | induced to the cavity part from the hole provided in the recessed part 19, and flows out of the contamination degree detection display body Y from the air outflow hole 23. FIG. As described above, the contamination degree detection display body Y is attached to the side portion adjacent to the air outlet 6, and is an independent structure that is partitioned from the air passage 9 that connects the air inlet 5 and the air outlet 6. Be placed.

As shown in FIGS. 3 and 4, the contamination degree detection display body K which is attached to the side portion of the outlet 6 and whose front surface is covered with the front display board 13 is rotated when the movable panel 3 b described above is rotated. Released. Although not particularly illustrated, a gap is formed between the upper surface of the contamination degree detection display body Y and the movable panel 3b, and therefore, there is no problem for the indoor air to flow into the inside from the air inflow hole 22.
Further, since the air outflow hole 23 is also open to the lower surface of the contamination degree detection display body Y, when the movable panel 3b is rotated, the air outflow hole 23 is moved from here to the exterior of the indoor unit body 4 outside the contamination degree detection display body Y. Smooth outflow.

  On the other hand, as shown in FIG. 1, an electrostatic atomization unit (electrostatic atomization means) M is disposed at a portion of the ventilation path 9 that communicates with the suction port side ventilation path 9 b upstream of the heat exchanger 10. Is done. In the electrostatic atomization unit M, an electrostatic mist discharge port 25 that discharges electrostatic mist is opened at an upper portion of the blowout port 6.

  8 is a configuration diagram of the electrostatic atomization unit M, FIG. 9 is a diagram for explaining the operation of the electrostatic atomization unit M, and FIG. 10 is an electrostatic atomization unit M and electrostatic mist release with respect to the filter mounting frame 26. It is a figure which shows the position of the exit 25. FIG.

The electrostatic atomization unit M includes a water generation unit (water generation means) 30, a discharge unit 40, and a high voltage application device 50.
The water generating unit 30 fixes a heat sink 32 made of a metal with good heat dissipation on one surface of the Peltier element 31, and a metal water generating plate 33 with high heat conductivity and a front surface on the other surface of the Peltier element 31. A cover 34 is attached.

  The water generation plate 33 is exposed to a part space communicating with the suction port side ventilation path 9a, and the air on the surface is cooled by the Peltier element 31, thereby generating condensed water on the outer surface. The front cover 34 covers and electrically insulates the Peltier element 31, and has an opening for exposing the water generating plate 33 to the suction port side ventilation path 9a. Condensed water generated here is supplied to the discharge unit 40. Guide the supply.

  The discharge unit 40 includes a discharge pin 41 made of a porous felt pin or the like to which condensed water is supplied from the water generation unit 30. The discharge pin 41 is electrically connected to the high voltage applying device 50 through a conductive strip-shaped lead plate.

  The discharge pin 41 discharges when a high voltage is applied by the high voltage application device 50, and causes the discharge to act on condensed water, thereby generating an electrostatic atomization phenomenon. As a result, water (condensation water) is divided into negative charged fine particles having a particle diameter of picometer to nanometer size, and electrostatic mist is generated.

  The discharge unit 40 and the electrostatic mist discharge port 25 are communicated by a mist discharge tube 44. Since the upstream part of the electrostatic atomizing unit M has many bent parts, the upstream part 44a is made of a hard resin, and the remaining downstream part 44b is formed when the mist discharge pipe 44 is assembled to the indoor unit body 4. In order to ensure the degree of freedom, it consists of a soft resin hose or the like.

  The electrostatic atomizing unit M is attached to the back surface of the filter unit mounting frame 26, and the electrostatic mist discharge port 25 is attached to the lower surface of the filter unit mounting frame 26. The electrostatic atomizing unit M and the electrostatic mist discharge port 25 cannot be visually observed even when the movable panel 3b is rotated and a part of the discharge port 6 and the contamination degree detection display body Y are opened.

  Note that sensors such as a plurality of temperature sensors are mounted in the indoor unit body 4 and send detection signals to the control unit K shown only in FIG. A setting signal set in the remote controller (remote operation panel) is also sent to the control unit K. All the electric parts such as the cross-flow fan 11 described above are controlled by receiving a control signal from the control unit K (control means).

Next, the operation of the air conditioner 1 will be described.
When an operation start signal is input to the air conditioner 1, the movable panel 3b rotates as shown in FIGS. 3 and 4 to open the outlet 6 and the front display plate 13 of the contamination degree detection display body K. The compressor provided in the outdoor unit is driven to perform the refrigeration cycle operation, and the cross flow fan 11 constituting the indoor blower is rotationally driven.

  Indoor air is sucked into the indoor unit main body 4 from the suction port 5, and dust and the like are captured and removed by the air filter F. Further, the indoor air is guided to the air inlet side ventilation path 9a, and heat is exchanged in the heat exchanger 10 to be changed into heat exchange air such as cold air or hot air. The heat exchange air is blown out into the room from the blowout opening 6 through the blowout side air passage 9b, and the room is air-conditioned to the set conditions.

  When certain conditions are met, the control unit K sends a drive control signal to the electrostatic atomization unit M. As a result, the Peltier element 31 is energized and the water generating plate 33 is cooled. A part of the suction air in the suction side air passage 9b comes into contact with the outer surface of the water generation plate 33 and is cooled, and the dew condensation water w is generated and adhered to the outer surface of the water generation plate 33 and the outer surface of the front cover 34.

  The condensed water w is guided by the front cover 34 and drops onto the discharge pins 41 by gravity. The discharge pin 41 is discharged when a high voltage is applied by the high voltage application device 50, and discharge acts on the dew condensation water w adhering to the discharge pin 41. The condensed water w undergoes an electrostatic atomization phenomenon and is divided into negative charged fine particles having a particle diameter of picometer to nanometer size, and electrostatic mist is generated.

  On the other hand, in the air outlet side ventilation path 9 b, the portion near the electrostatic mist discharge port 25 becomes negative with respect to the pressure in the mist discharge pipe 44 due to the blowing of the cross flow fan 11. The electrostatic mist generated by the discharge unit 40 is sucked to the outlet 6 side through the mist discharge tube 44 and discharged from the electrostatic mist outlet 25 provided in the vicinity of the outlet 6 to the outlet 6.

  The electrostatic mist is discharged into the room on the flow of heat exchange air blown from the blow-out port 6. Since the electrostatic mist generates OH radicals having a strong oxidizing power, the strong oxidizing power of the OH radicals removes hydrogen atoms from the organic matter in the air and decomposes and cleans the bonds of the organic matter. The OH radical is highly reactive and eventually becomes carbon dioxide or water.

  By the way, the heat exchange air is blown out from the blowout port 6, so that the blowout port 6 and the peripheral portion of the blowout port 6 are in a negative pressure state. In the contamination degree detection display body Y, the air outflow hole 23 is opened at a position very close to the blowout port 6, and the air outflow hole 23 and its airflow hole 23 in accordance with the flow of heat exchange air blown out from the blowout port 6. The peripheral part also becomes negative pressure.

  The air inflow hole 22 provided in the contamination degree detection display body Y communicates with the air outflow hole 23 through the cavity, and the air on the front side of the indoor unit body 4 that is the room air around the air inflow hole 22 is air. It is sucked into the inflow hole 22. In addition, since the air inflow hole 22 is located at a position away from the blowout port 6, the heat exchange air blown out from the blowout port 6 does not flow into the air inflow hole 22.

  Pure indoor air is guided from the air inflow hole 22 into the contamination degree detection display body Y and fills the recess 19 where the gas sensor GS is attached. The gas sensor GS detects the degree of dirt in the room air and sends a detection signal to the control unit K. The room air that fills the recessed portion 19 is guided to the air outflow hole 23 through a cavity formed on the back surface of the contamination degree display portion 16.

  The room air that has reached the air outflow hole 23 is attracted to the heat exchange air that is blown out from the blowout opening 6 and flows out from the air outflow hole 23. Then, the air is blown into the room together with the heat exchange air blown from the blowout port 6. New indoor air flows into the air inflow hole 22, and the action of detecting the degree of contamination by the gas sensor GS and outflowing from the air outflow hole 23 as described above is repeated.

As described above, in the contamination degree detection display body Y, the air inflow hole 22 that guides the room air to the gas sensor GS is provided in a portion separated from the air outlet 6, and the air outflow hole 23 that communicates with the air inflow hole 22 is provided in the room. It is provided on the front surface of the machine body 4 and in the vicinity of the outlet 6.
The indoor air guided from the air inflow hole 22 is detected by the gas sensor GS, the degree of contamination is detected, passes through a portion separated from the ventilation path 9 formed in the indoor unit body 4, and is guided to the air outflow hole 23, It flows out of the indoor unit main body 4.

  Therefore, an air inlet hole 22 that guides room air to the gas sensor GS is provided outside the ventilation path 9 that communicates from the suction port 5 to the blowout port 6, and an air flow to the gas sensor GS is generated by the induced airflow during the air conditioning operation. The detection sensitivity of the gas sensor GS can be improved without being affected by the air flow of the ventilation path 9 that performs the air conditioning operation.

A movable panel 3b is provided on the front surface of the contamination degree detection display body Y so as to be freely opened and closed. In particular, since the air inflow hole 22 and the air outflow hole 23 provided in the contamination degree detection display body Y are closed by the movable panel 3b when the operation is stopped, the intrusion of dust is surely prevented even if the operation is stopped for a long time. To do.
Dust does not adhere to and accumulate on the gas sensor GS, and the sensor accuracy can be prevented from deteriorating at the start of the air conditioning operation.

  A detection signal detected by the gas sensor GS from room air is sent to the control unit K, where the degree of contamination is determined. Then, a control signal is sent from the control unit K to the contamination level display unit 16 to display the contamination level, and a control signal is sent to the electrostatic atomization unit M to perform the above-described operation, so that it is blown out from the outlet 6. Clean the heat exchange air. As a result, the living room can be cleaned.

  Upon receiving the detection signal from the gas sensor GS, the control unit K performs display control on the contamination level display unit 16 and operation control on the electrostatic atomization unit M related thereto based on the contamination level.

FIG. 7 is a diagram for explaining a display example of the contamination level display unit 16.
On the front display board 13 covering the surface of the contamination degree display section 16, there is an operation display mark 60 illuminated on the one (left) side by the LED 15 that is turned on when the air conditioning operation is started. A gas sensor mark 70 indicating the presence of the gas sensor GS is drawn on the other (right) side. A gas sensor GS is disposed on the back side of the gas sensor mark 70.

  The operation display mark 60 and the gas sensor mark 70 are spaced from each other, and the three LEDs 15 described above are arranged on the back side of the space. When each LED 15 is turned on, the dirt mark 80 drawn on the front display board 13 is illuminated, so that the resident can check the degree of air pollution.

The control unit K divides the degree of contamination detected by the gas sensor GS into at least three determination steps. In practice, as shown in FIG.
When the control unit K determines that the contamination level is the highest level, which is the fourth determination stage or higher, the control unit K does not energize all the LEDs 15 of the contamination level display unit 16 as “stain level 4 or higher”. That is, it is “off”, and all the contamination marks 80 between the operation display mark 60 and the gas sensor mark 70 are displayed.
At the same time, the control unit K controls the electrostatic atomizing unit M to perform continuous operation with full capacity. This promotes immediate cleaning of the room.

When it is determined that the degree of contamination is the next upper middle level, less than the fourth determination stage and equal to or higher than the third determination stage, one LED 15 of the contamination level display unit 16 is indicated as “dirt degree 3”. Energize to. That is, “one light”, one LED 15 close to the operation display mark 60 is controlled to be turned on, and the corresponding dirt mark 80 is illuminated.
At the same time, the control unit K controls the electrostatic atomization unit M so as to perform intermittent operation in which the continuous operation time is 2 and the stop time is 1, thereby promoting the cleaning of the living room.

When it is determined that the degree of contamination is the next lower intermediate level, which is less than the third determination step and equal to or higher than the second determination step, the two LEDs 15 of the contamination level display unit 16 are indicated as “dirt degree 2”. Energize to. That is, only two LEDs 15 near the operation display mark 60 are controlled to be turned on, and the corresponding dirt mark 80 is illuminated.
At the same time, the control unit K controls the electrostatic atomization unit M to perform intermittent operation in which the continuous operation time and the stop time are the same time, thereby maintaining the cleanliness of the room.

  When it is determined that the degree of contamination is the next small level (the degree of contamination is the smallest), less than the second determination stage, and greater than or equal to the first determination stage, the degree of contamination is displayed as “contamination level 1”. All 16 LEDs 15 are energized. That is, it is “all lamps”, lighting control is performed on all the LEDs 15, and all the illuminations of the contamination level mark 80 are turned on.

At the same time, the control unit K controls the electrostatic atomization unit M to perform intermittent operation with a ratio of 1 for the continuous operation time and 2 for the stop time to prevent the cleaning of the living room from being impaired.
In this way, the life of the electrostatic atomizing unit M is extended while keeping the air cleaning capability appropriate.

  In addition, it is necessary to perform initialization control of the gas sensor GS when starting the air-conditioning operation and starting the detection of the degree of contamination by the gas sensor GS. That is, at the start of the sensor, control is performed so as not to detect for a predetermined time, but to start measurement after being stabilized.

At this time, the control unit K tentatively controls the stain level display unit 16 to display a stain level “3”, for example, a display with a medium level of stain level. At the same time, the electrostatic atomization unit M is controlled to perform intermittent operation with a continuous operation time of 2 and a stop time of 1.
Therefore, even during initialization of the gas sensor GS, the room air can be cleaned by the electrostatic atomizing unit M, and the time for actually cleaning the room air can be shortened.

Further, the gas sensor GS may fail during the air conditioning operation, and the degree of contamination of room air may not be detected.
When such an accident occurs, the control unit K controls the operation of the electrostatic atomizing unit M assuming the degree of indoor air contamination according to the duration of the air conditioning operation. Therefore, the cleanliness of the living room can be maintained, and disadvantageous conditions for the residents can be minimized.

  As mentioned above, although this embodiment was described, the above-mentioned embodiment is shown as an example and does not intend limiting the range of embodiment. The novel embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  5a ... Upper suction port, 5b ... Front suction port, 6 ... Outlet port, 10 ... Heat exchanger, 11 ... Cross-flow fan (blower), 4 ... Indoor unit body, 9 ... Ventilation path, GS ... Gas sensor (contamination detection means) ), 16... Soil degree display section (stain degree display means), 22... Air inflow hole, 23... Air outflow hole, 3 b... Movable panel, 30 ... Water generation section (water generation means), M. (Electrostatic atomization means), K ... control unit (control means).

Claims (3)

In an indoor unit of an air conditioner in which a heat exchanger and a blower are arranged in a ventilation path in an indoor unit body that communicates the suction port and the blowout port, and an indoor unit body that has a suction port and a blowout port of indoor air.
Contamination level detection means for detecting the degree of contamination of indoor air, and dirt for displaying the degree of contamination of room air detected by the contamination level detection means, provided side by side in the side portion of the outlet in the indoor unit main body. Degree display means;
An air inflow hole for guiding indoor air to the soiling degree detection means;
Indoor air that is provided on the front surface of the indoor unit main body and in the vicinity of the outlet and that has passed through the air inflow hole through the soiling degree detection means and separated from the ventilation path. An air outflow hole for flowing from the inside to the outside,
An air conditioner indoor unit comprising: Further, the air outlet, the contamination level detection means and the contamination level display means are opened on the front surface of the indoor unit main body during the air conditioning operation, and the air outlet, the contamination level detection means and the contamination level display means are opened from the room when the air conditioning operation is stopped. The indoor unit for an air conditioner according to claim 1, further comprising a movable movable panel for shielding. Furthermore, the indoor unit main body is provided with water generation means for generating water from the moisture of the indoor air guided to the ventilation path, and the electrostatic mist that atomizes the water generated by the water generation means and discharges it into the room And
The contamination level detected by the contamination level detection means is divided into at least three determination stages. When the contamination level is the highest determination stage, the electrostatic atomization means is continuously operated, and the contamination level is medium. The electrostatic atomization means is intermittently operated so that the operation time and the operation stop time are the same time when the determination stage is, and when the degree of contamination is the smallest determination stage, the electrostatic atomization means is moved from the operation time. The air conditioner indoor unit according to claim 2, further comprising: a control unit configured to perform intermittent operation so that the stop time becomes longer.

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