JP6849561B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner having an automatic cleaning function for an air filter.

Conventionally, in this type of indoor unit, an indoor unit in which an air filter that collects dust in the air is installed at an air suction port has a filter cleaning means for scraping and cleaning the dust of the air filter, and is used for cooling operation or The total time during which the heating operation is performed is counted, and when the counted total time exceeds a predetermined time, the filter cleaning means is automatically driven at the timing when the cooling operation or the heating operation is stopped and adheres to the air filter. There was something to remove the dust. (For example, Patent Document 1)

Japanese Unexamined Patent Publication No. 2004-101101

However, in this conventional one, the integrated time is counted without distinguishing between the operating time in which the cooling operation is performed and the operating time in which the heating operation is performed, and when the counted value becomes a predetermined value or more. Since the automatic cleaning operation by the filter cleaning means was started, it is estimated that the room is hot and humid when the cooling operation is set by the remote control, and the dust adhering to the air filter contains a large amount of moisture. There is a high possibility that the dust adhering to the air filter is difficult to scrape off with the filter cleaning means, and the automatic cleaning operation of the air filter could not sufficiently remove the dust, and heating operation was required. Since the room is low temperature and low humidity and the dust adhering to the air filter is estimated to be in a relatively dry state, there is a high possibility that it will be easily scraped off by the filter cleaning means. There was room for improvement because it was thought that the filter was automatically cleaned.

In order to solve the above problems, in claim 1 of the present invention, an indoor unit in which an air suction port for sucking air and an air outlet for blowing air are formed, and an indoor unit formed in the indoor unit and the suction port and the air outlet. Installed in the air passage connecting the air passages, a heat exchanger arranged in the middle of the air passage to exchange heat with air, a blower fan for blowing the air heat exchanged by the heat exchanger from the outlet, and the suction port. An air filter that collects dust in the air, and a filter cleaning means that scrapes off the dust adhering to the air filter.
At least a remote controller with an operation mode switch that can be set by switching the operation mode of cooling operation and heating operation,
The integrated time in which the operation mode set by the operation mode switch of the remote control is executed is counted, and when the value obtained by multiplying the counted integrated time by a predetermined coefficient value becomes a predetermined value or more, the filter cleaning means is used. A control unit that performs an automatic cleaning operation that is automatically driven is provided. The control unit sets a coefficient value to be multiplied by the integrated time according to each operation mode set by the operation mode switch, and the cooling operation is performed. The feature is that the coefficient value multiplied by the integrated time in the set state is larger than the coefficient value multiplied by the integrated time in the set state of the heating operation.

Further, in claim 2, an indoor unit in which a suction port for sucking air and an air outlet for blowing out air are formed, an air passage formed in the indoor unit and connecting the suction port and the air outlet, and the air passage. A heat exchanger that is placed in the middle of the air and exchanges heat with air, a blower fan that blows the air that has been heat-exchanged by the heat exchanger from the outlet, and a blower fan that is installed at the suction port to collect dust in the air. An air filter, a filter cleaning means for scraping off dust adhering to the air filter, and
At least a remote controller with an operation mode switch that can be set by switching the operation mode of cooling operation and dehumidification operation,
The integrated time in which the operation mode set by the operation mode switch of the remote control is executed is counted, and when the value obtained by multiplying the counted integrated time by a predetermined coefficient value becomes a predetermined value or more, the filter cleaning means is used. A control unit that automatically drives an automatic cleaning operation is provided, and the control unit sets a coefficient value to be multiplied by an integrated time according to each operation mode set by the operation mode switch, and performs the dehumidification operation. The characteristic value is that the coefficient value multiplied by the integrated time in the set state is larger than the coefficient value multiplied by the integrated time in the state in which the cooling operation is set.

Further, according to claim 3, the remote controller has an air volume switch capable of changing the rotation speed of the blower fan and setting the strength of the air volume of the air blown from the air outlet.
The control unit sets a coefficient value to be multiplied by the integrated time according to each air volume mode in which a strong wind is set by the air volume switch, and the coefficient value to be multiplied by the integrated time in a state where a strong wind is set is a weak wind. Is larger than the coefficient value to be multiplied by the integration time in the set state.

According to the present invention, a coefficient value to be multiplied by the integrated time is set according to each operation mode set by the operation mode switch, and the coefficient value to be multiplied by the integrated time in the state where the cooling operation is set is the heating operation. Is larger than the coefficient value multiplied by the integrated time in the set state, so it is estimated that dust containing a lot of moisture is adhering to the air filter. Since the operation is performed, the filter cleaning operation is performed at a cycle according to the ease of scraping the dust adhering to the air filter, and when the cooling operation is performed, the dust adhering to the air filter is surely caught by the filter cleaning operation. It can be gathered to prevent excessive filter cleaning operation during heating operation.

In addition, the coefficient value to be multiplied by the integrated time is set according to each operation mode set by the operation mode switch, and the cooling operation is set to the coefficient value to be multiplied by the integrated time in the state where the dehumidifying operation is set. Since it is larger than the coefficient value multiplied by the integrated time of the state, the automatic cleaning operation is performed earlier in the dehumidifying operation, which is estimated to have dust containing a lot of moisture adhering to the air filter, than in the cooling operation. Therefore, the filter cleaning operation is performed at a cycle according to the ease of scraping the dust adhering to the air filter, and when the dehumidifying operation is performed, the dust adhering to the air filter can be reliably collected by the filter cleaning operation. It is possible to prevent the filter cleaning operation from being excessively performed when the cooling operation is performed.

In addition, the coefficient value to be multiplied by the integrated time is set according to each air volume mode in which the strong wind is set by the air volume switch, and the coefficient value to be multiplied by the integrated time when the strong wind is set is set to be weaker. Since it is larger than the coefficient value multiplied by the integrated time of the state, the filter is cleaned earlier when the strong wind operation, which is estimated to have a large amount of dust adhering to the air filter, is performed than when the weak wind operation is performed. It is possible to prevent the operation from being carried out with a large amount of dust adhering to the air filter.

A perspective view showing an embodiment of the present invention. Side view sectional view of the same embodiment Expanded perspective view of the same embodiment Top view of the unit frame of the same embodiment Right side view of the unit frame of the same embodiment AA sectional view shown in FIG. 4 of the same embodiment. Front view of the brush of the same embodiment Front view of the filter drive unit of the same embodiment Expanded perspective view of the motor unit Front view of the back plate of the same embodiment BB sectional view shown in FIG. 10 of the same embodiment. Front view of the filter guide plate of the same embodiment FIG. 12 is a sectional view taken along the line CC shown in FIG. 12 of the same embodiment. Perspective view of the rear plate of the same embodiment Cross-sectional view of the rear plate of the same embodiment Perspective view of the front cover of the same embodiment Sectional view of the front cover of the same embodiment Front view of the air filter of the same embodiment Control block diagram of the same embodiment Flow chart explaining the filter cleaning operation of the same embodiment The figure explaining the coefficient value of the same embodiment A flowchart illustrating a filter cleaning operation according to another embodiment of the present invention. The figure explaining the coefficient value of the same other embodiment

Next, an embodiment of the air conditioner of the present invention will be described.
Reference numeral 1 denotes an indoor unit of a separate air conditioner, in which an outer frame 6 is formed by a back plate 2, a rear plate 3, a front cover 4, and an open panel 5, and the upper left and right of the open panel 5 located in front of the front cover 4. It can be opened and closed in front of the front cover 4 with a support shaft (not shown) provided in the above as a fulcrum.

7 is a horizontally long grid-like suction port on the upper surface of the front cover 4, and 8 is a horizontally long air outlet on the bottom surface from the bottom of the front cover 4 that blows out temperature-controlled air diagonally forward. An air passage 9 is formed between the eight.
Inside the suction port 7 of the air passage 9, a pair of left and right air filters 10 for removing dust contained in the suction air are provided, and further inside (downstream side) of the air filter 10 is a horizontally long fin tube. It has a heat exchanger 11 of the same type, and is arranged in an inverted V shape in a side view with an intermediate portion in the front-rear direction as a top.

Further, below the heat exchanger 11, a blower fan 12 composed of a horizontally long cross-flow fan is provided, and the outlet 8 adjusts the wind direction of the blown air in the vertical direction during operation and automatically when stopped. A vertical wind direction plate 13 that closes the air outlet 8 and a left and right wind direction plate 14 that adjusts the wind direction of the blow air in the left-right direction are provided.

Reference numeral 15 denotes a brush unit, which is a unit frame 18 formed of a horizontally long grid-shaped vertical rail 16 and a horizontal rail 17, and scrapes dust adhering to the air filter 10 at the tip of the unit frame 18. It is composed of a brush 19 to be taken and a filter driving unit 20 for moving the air filter 10 to the back side.

The unit frame 18 has left and right end portions 21 protruding from both ends on the rear side, brush mounting holes 22 are formed in the left and right end portions 21, respectively, and the rotation shaft 23 of the brush 19 is inserted into the brush mounting holes 22. By doing so, the brush 19 can rotate around the brush mounting hole 22.

Reference numeral 24 denotes a pair of slide protrusions on the left and right outer sides in front of the brush mounting holes 22 on the left and right end portions 21, which are used as guides when attaching and detaching the brush unit 15. It is a locking protrusion, which is used as a stopper when the brush unit 15 is mounted, and 26 is a filter drive portion mounting hole further forward than the slide protrusion 24 of the vertical rail 16.
Further, 27 is a slide groove 27 on the inner side surface of the left and right vertical rails 16 which serves as a guide when the air filter 10 moves, and 28 is a brush which is located at both ends of the brush 19 and transmits the rotational force of the brush 19. It is a gear.

The filter drive unit 20 is composed of a drive shaft 29 made of an aluminum rod and a pair of drive gears 30 which are fixed through both ends of the drive shaft 29, and the drive shaft 29 projects outward from the drive gear 30. By inserting the filter drive unit 20 into the filter drive unit mounting hole 26, the filter drive unit 20 rotates about the filter drive unit mounting hole 26.

Reference numeral 40 denotes a motor unit, which is composed of a brush motor 41 that rotationally drives the brush 19 and a feed motor 42 that rotationally drives the filter drive unit 20, and includes the brush motor 41 and the feed motor 42. Uses a step motor capable of forward and reverse rotation, operates the brush 19 and the filter drive unit 20 in response to a signal from the control unit 43, and cleans the air filter 10.

Reference numeral 44 denotes a motor mounting plate, in which a brush motor 41 and a feed motor 42 are screwed to one side surface, and interlocking gears 47 and 48 provided on the motor shafts 45 and 46 and the other side surface are provided through holes 49 of the motor mounting plate 44. , 50 to connect through.
Reference numeral 51 denotes a gear cover, which covers the interlocking gears 47 and 48 and includes shaft holes 52 and 53, and rotatably holds the interlocking gears 47 and 48 between the through holes 49 and 50 and the shaft holes 52 and 53. To do. The gear cover 51 is locked to the motor mounting plate 44 by being locked by a claw portion 54 and a locking portion 55 provided at the end of the motor mounting plate 44, and the motor unit 40 is attached to the upper left and right ends of the back plate 2. It has a fixing hole 56 for screwing.
One set of motor units 40 is provided for one air filter 10, and the configuration of the motor unit 40 corresponding to the air filter 10 arranged on the right side is symmetrical with the configuration described above. It has a unit 40.

The back plate 2 constitutes the rearmost portion of the indoor unit 1, and the back plate 2 has a locking recess 70 at the upper part for locking to an installation plate (not shown) for mounting on the wall surface of the room, and a lower portion. It has a claw portion 71 for fixing to the installation plate by hooking the claw.
Further, the back plate 2 stands vertically on the rear surface 73 of the dust shooter 72 (second space) that sends the dust falling from the brush unit 15 and the motor unit 40 side downward, and on the front side of the rear surface 73. A plurality of side walls 74 to be provided are formed.

A left motor unit mounting portion 76 to which the motor unit 40 can be mounted is formed between the upper left side of the side wall 74 and the left outer frame 75 of the back plate 2. It is fixed by screwing into the fixing hole 56 of the mounting plate 44.
Further, a right motor unit mounting portion 78 is provided between the right upper side wall 74 at the right end and the right outer frame 77 at the upper right side, and is fixed by screwing in the same manner as the motor unit 40.
Further, a fixing cylinder 80 for fixing the filter guide plate 79 on which four cylinders are erected is formed on the upper part of the central ridge of the rear surface 73.

A pair of left and right fixing holes 81 facing the fixing cylinder 80 are provided on the upper part of the center of the filter guide plate 79, and the filter guide plate 79 is screwed and fixed to the back plate 2, and the back surface of the filter guide plate 79 is the above. The front surface 82 of the dust shooter 72 (second space) is formed, and the dust scraped from the air filter 10 falls between the front surface 82 and the rear surface 73.

Reference numeral 83 denotes a comb tooth installed so as to be parallel to the upper end of the filter guide plate 79. When the tip of the comb tooth 83 bites into the brush 19, dust adhering to the brush 19 is scraped from the air filter 10 and brushed. Separated from 19 and dropped to the dust shooter 72 side.
The tip of the comb tooth 83 protrudes toward the rotation axis 23 of the brush 19, and the distance between the brush 19 and the comb tooth 83 is set with respect to the amount of the comb tooth 83 that bites into the brush 19 according to the amount of bristles and the rigidity of the brush 19. It can be adjusted by changing it. Reference numeral 84 denotes a side plate located at the left and right ends of the filter guide plate 79 and projecting in the rear plate three directions, and has a guide groove 85 in which the left and right ends of the air filter 10 can slide when cleaning the filter, and when cleaning the filter. The filter 10 slides in the vertical direction in the filter path 86 (first space), which is the space between the rear plate 3 and the filter guide plate 79.

Two U-shaped openings 87 for attaching the brush unit 15 are formed on the upper portion of the rear plate 3, and slide protrusions 24 of the brush unit 15 are guided on the left and right inner side surfaces of the openings 87. A groove 88 is formed. Reference numeral 89 denotes a rear drain pan, and by arranging the rear portion of the heat exchanger 11 above, the condensed water generated from the rear portion of the heat exchanger 11 is accumulated and drained during the cooling operation. Reference numeral 90 denotes a casing, and the blower fan 12 is provided in front of the casing with a predetermined space in between. The blower fan 12 is a cross-flow type fan having a horizontally long columnar shape and a large number of blades. A bearing (not shown) attached to the left side surface 91 of the casing 90 and a blower motor 93 attached to the right side of the right side surface 92 of the casing 90. Rotates in the vertical direction with the rotation shaft 94 of. Reference numeral 95 denotes mounting holes provided at the left and right ends and above and below the center, and the mounting holes 95 are penetrated through the mounting ribs 96 and the like erected on the back plate 2 and fixed by screws. Reference numeral 97 denotes a pair of front cover mounting pieces provided on the left and right sides of the upper surface of the rear plate 3, and a protrusion 98 for locking is formed upward at the tip portion.

Reference numeral 99 denotes a front drain pan, and by arranging the front portion of the heat exchanger 11 above, the dew condensation water generated from the front portion of the heat exchanger 11 is accumulated and drained during the cooling operation. Further, mounting legs (not shown) are provided at the left and right ends of the front drain pan 99, and the mounting legs are fitted to the rear plate 3 to be mounted on the rear plate 3.

Reference numeral 100 denotes a dust box, which is installed on the bottom surface of the rear plate 3 so as to be detachable by grasping a handle (not shown) from below at the dust discharge port 101 provided in the lower part of the dust shooter 72. The dust box 100 has a sufficient capacity to collect dust generated by cleaning the filter for one year without overflowing. Reference numeral 102 denotes a front cover mounting hole provided in the lower part of the rear plate 3, and the lower part of the front cover 4 is screwed and fixed.

The front cover 4 has an upper frame 112 connecting the upper surface between the left side plate 110 and the right side plate 111, a lower frame 113 connecting the bottom surface, a front frame 114 connecting the lower part of the front from the center of the front surface, and substantially the center in the left-right direction. It includes a central frame 115 that vertically connects the upper frame 112 and the front frame 114. A groove 116 continuous with the groove 88 of the rear plate 3 and a U-shaped locking portion 117 are formed in front of the groove 116 on the upper inner side of the left side plate 110 and the central frame 115, and the grooves 88 and 116 are formed. Guides the slide protrusion 24 of the brush unit 15 and pulls it downward with the brush unit 15 abutting at the rearmost portion, so that the locking protrusion 25 of the brush unit 15 fits into the U-shaped locking portion 117. , The brush unit 15 is set.

Reference numeral 118 denotes a filter groove provided below the groove 116, which is continuously connected to the slide groove 27 of the unit frame 18 and holds the left and right ends of the air filter 10.
A filter insertion portion 119 is formed at the lower end of the filter groove 118, and a rectangular and flexible air filter 10 is inserted from the filter insertion portion 119, and the tip of the air filter 10 moves to the positions of the brush 19 and the filter drive portion 20. By doing so, the air filter 10 is set to the position during normal operation.
Reference numeral 120 denotes a mounting hole provided through the upper surfaces of the left side plate 110 and the right side plate 111, and the protrusion 98 at the tip of the front cover mounting piece 97 of the rear plate 3 is locked to fix the upper portion of the front cover 4. After locking the upper part of the front cover 4, the lower part of the front cover 4 is screwed and fixed to the rear plate 3 with a lower mounting hole (not shown). The outlet 8 is formed between the front frame 114 and the lower frame 113, and a reinforcing frame 121 that vertically reinforces the front frame 114 and the lower frame 113 is provided at substantially the center of the outlet 8 in the left-right direction. The lower frame 113 at the lower portion 8 has a left-right wind direction plate 14 rotatably attached. Further, the side wall 123 of the air outlet 8 is rotatably provided with a vertical wind direction plate 13.

The air filter 10 is provided with a large number of square rails 122 and horizontal rails 123 welded with a resin net 124, and the vertical rails 122 at both ends mesh with the drive gear 30 of the filter drive unit 20. Is formed.
With this configuration, when cleaning the filter, the filter 10 passes between the drive gear 30 and the brush 19 due to the rotation of the drive gear 30 and is sent in the direction of the filter guide plate 79. Further, when passing between the drive gear 30 and the brush 19, dust adhering to the surface of the air filter 10 is scraped off by the brush 19.
Then, the filter cleaning means removes the drive gear 30 that engages with the rack 125 and sends the filter 10 to the filter guide plate 79 side, the feed motor 42 that rotates the drive gear 30, and the dust adhering to the surface of the filter 10. It is composed of a brush 19 for scraping and removing, a brush motor 41 for rotating the brush 19, and a gear 83 for scraping dust adhering to the brush 19 toward the dust shooter side.

The open panel 5 is rotatably provided around a locking portion (not shown) facing a pair of locking shafts (not shown) provided on the upper left and right ends of the front cover-4, and is an open panel. Both ends of the lower portion of 5 are locked and fixed to the front frame 114 of the front cover-4.

The control unit 43 will be described in detail. On the input side, the room temperature sensor 126 that detects the temperature in the room, the humidity sensor 127 that is installed near the suction port 7 and detects the humidity in the room, and the temperature of the heat exchanger 11 are displayed. A heat exchange sensor 128 for detection and a filter sensor 129 composed of a microswitch arranged in the filter path 86 (first space) of the filter guide plate 79 and detecting the position of the air filter 10 in the ON / OFF state. The wiring is connected so that various detected information is input as an electric signal.
Further, on the output side, a blower motor 130 that rotationally drives the blower fan 12 at a predetermined rotation speed, a vertical wind direction motor 131 that operates the positions of the vertical wind direction plates 13, and left and right wind directions that operate the positions of the left and right wind direction plates 14. Wiring is connected so that a predetermined instruction is output to the motor 132, the brush motor 41 that rotationally drives the brush 19, and the feed motor 42 that rotationally drives the filter drive unit 20.

Reference numeral 140 denotes a remote controller that transmits a signal to the control unit 43 by wireless communication. The remote controller 140 has a heating operation that heats the room by blowing hot air from the outlet 8 and a cooling operation that blows cold air from the outlet 8. An operation mode switch 141 that can switch between cooling operation for cooling the room and an air volume switch 142 that can select the air volume in each operation mode from automatic, breeze, weak wind, and strong wind are provided, and transmission is performed from the remote controller 140. The control unit 43 appropriately controls various actuators in the indoor unit 1 in response to the instruction signal.

(Operation when cleaning the air filter)
Next, the operation contents of each part when cleaning the air filter 10 by the filter cleaning means will be described in detail.
The automatic cleaning operation of the air filter 10 is permitted when the stop instruction of the cooling operation or the heating operation is issued, and the condition of the integrated value of the operation time described later is satisfied, or the air filter is manually operated. When the automatic cleaning operation of 10 is instructed, the control unit 43 starts driving the brush motor 41 and the feed motor 42, and rotates the brush 19 and the filter drive unit 20.

As a result, the feed motor 42 is rotationally driven to engage the rack 125 of the air filter 10, the air filter 10 is gradually pulled toward the rear filter path 86 (first space), and the brush 19 is rotationally driven. The dust accumulated on the upper surface side of the air filter 10 is scraped off.
Then, the dust adhering to the brush 19 is scraped off to the dust shooter 72 side by the comb teeth 83 of the filter guide plate 79, and is collected and collected in the dust box 100.

After that, when the tip of the air filter 10 reaches the position of the filter sensor 129 arranged near the lower end of the filter path 86 and the control unit 43 determines that the filter sensor 129 has output an ON signal, the control unit 43 feeds. By reversing the rotation direction of the motor 42 and driving the motor 42, the air filter 10 is returned to the filter insertion portion 119 side of the front cover 4.
At this time, since the rotation direction of the brush motor 41 does not change, the dust adhering to the brush 19 and the comb teeth 83 does not reattach to the air filter 10 side.

After the ON signal is output by the filter sensor 129 and the rotation direction of the feed motor 42 is reversed, the control unit 43 reverses the rotation direction of the feed motor 42 and then counts the number of steps of the feed motor 42 to reach a predetermined value. If it is determined that the air filter 10 has returned to the position before the start of the cleaning operation, the reverse drive of the feed motor 42 is stopped, and if it is determined that the air filter 10 has passed the filter path 86 a predetermined number of reciprocations, the brush motor The drive of the feed motor 42 and the feed motor 42 is stopped, and the cleaning operation of the air filter 10 is completed.

By periodically performing the cleaning operation of the air filter 10 as described above, the cooling operation and the heating operation are not continuously performed with a large amount of dust adhering to the air filter 10, and the air filter 10 is not continuously performed. Since the air flowability of the air can be maintained in a good state, it is possible to blow air into the room according to the air volume set during the cooling and heating operations, and the usability of the user is not impaired.

Further, since several months to one year have passed since the cleaning operation of the air filter 10 was performed, when the dust in the dust box 100 is discarded, the handle of the dust box 100 is grasped from the dust discharge port 101 of the rear plate 3 and the dust box 100 is lowered. Since the dust box 100 can be easily removed by pulling the dust box 100, the dust inside the dust box 100 can be removed without opening the open panel 5, which is convenient for the user.

(Flow of automatic cleaning operation according to operation mode and air volume)
Next, the flow of the automatic cleaning operation of the air filter 10 in the present embodiment will be described in detail based on the flowchart of FIG.
First, the control unit 43 determines whether the operation start of the heating operation or the cooling operation is set by the operation mode switch 141 of the remote control 140 (step S101), and if the operation start is set, the integration of the set operation modes is performed. Select the coefficient value c determined according to the time and the set air volume, calculate T by multiplying the integrated time of each operation mode by the coefficient value c (step S102), and if the operation start is not set, the same step. The determination in S101 is repeated.

The T calculated in step S102 will be described in detail.
The control unit 43 selects the coefficient value c based on the integrated time and the air volume of the operation mode from the table shown in FIG. 21 to immediately before the operation stop, and calculates the T.
For example, when the control unit 43 determines that the operation mode from the start to the stop of the operation is the cooling operation and the air volume setting is a weak wind for 4 hours and a breeze for 2 hours, the T is as follows. Is calculated to.
T = 4 × 1.5 + 2 × 1 = 8
Further, when the control unit 43 determines that the operation mode from the start to the stop of the operation is the heating operation and the air volume setting is a weak wind for 4 hours and a breeze for 2 hours, the T is as follows. Is calculated to.
T = 4 × 1 + 2 × 0.5 = 6

When the process of step S102 is completed, the control unit 43 determines whether or not there has been an operation stop instruction (step S103), and if there is an operation stop instruction, the T is multiplied by a coefficient value on the integrated time of each past operation mode. The total value Ta to which Tp is added is calculated (step S104), and if there is no operation stop instruction, the process returns to the determination in step S101.

After calculating Ta in step S104, the control unit 43 determines whether Ta is 24 or more, which is a predetermined value (step S105), and if it determines that Ta is 24 or more, drives the brush motor 41 and the feed motor 42. By starting, the automatic cleaning operation of the air filter 10 is started, and the calculated Ta and Tp are erased to end the control (step S106). If it is determined that the Ta is less than 24, the Ta is included in the Tp. (Step S107), and the process returns to the determination in step S101.

As described above, when the automatic cleaning operation of the air filter 10 is performed, the coefficient value to be multiplied by the integrated operation time, which is the count value of the execution time of the automatic cleaning operation, is the coefficient value to be multiplied during the cooling operation for heating. Since it is larger than the coefficient value to be applied during operation, the air filter 10 is automatically cleaned earlier than when the heating operation is performed when the cooling operation is performed, so that the dust contains a large amount of moisture. Is presumed to be attached to the air filter 10. When the cooling operation is performed, the automatic cleaning operation is performed at an early stage, and the air can be blown according to the set air volume without deteriorating the air flowability of the air filter 10. Therefore, the usability of the user is not deteriorated, and it is possible to prevent the automatic cleaning operation of the air filter 10 from being excessively performed in the heating operation.

(Flow of automatic cleaning operation according to detected humidity and air volume)
Next, the flow of the automatic cleaning operation according to another embodiment of the present invention will be described with reference to FIG.
Regarding another embodiment, the configuration of the indoor unit 1, the input of the control unit 43, various sensors and motors connected to the output side, and the switches of the remote controller 140 are the same as those of the above-described embodiment. Omit.
First, the control unit 43 determines whether the operation start of the heating operation or the cooling operation is set by the operation mode switch 141 of the remote control 140 (step S201), and if the operation start is set, it is detected by the humidity sensor 127. Select the coefficient value c determined according to the humidity and the set air volume, calculate T by multiplying the execution time of each operation mode by the coefficient value (step S202), and if the operation start is not set, the same step S201. Repeat the judgment of.

The T calculated in step S202 will be described in detail.
The control unit 43 selects the coefficient value c based on the humidity detected by the humidity sensor 127 and the air volume from the table shown in FIG. 23 to just before the operation is stopped, and calculates the T.
For example, it is controlled that the air volume setting is weak when the detected humidity for 4 hours is 60% RH or more, which is a predetermined value, and the air volume setting is weak when the detected humidity for 2 hours is less than 60% RH from the start to the stop of operation. When the unit 43 determines, the T is calculated as follows.
T = 4 × 1.5 + 2 × 1 = 8

Since steps S203 to S207 after calculating T in step S202 are the same as steps S103 to S107, description thereof will be omitted.

As described above, when the automatic cleaning operation of the air filter 10 is performed, the detected humidity is 60% RH or more, which is a predetermined value, for the coefficient value to be multiplied by the operation integrated time, which is the count value of the execution time of the automatic cleaning operation. Since the coefficient value to be multiplied at is larger than the coefficient value to be multiplied when the detected humidity is less than 60% RH, the automatic cleaning operation of the air filter 10 is performed at an early stage when the humidity in the room is high, so that the humidity is removed. If a large amount of dust is attached to the air filter 10, the automatic cleaning operation is performed at an early stage, and the air flowability of the air filter 10 is not deteriorated, and the air can be blown according to the set air volume, which is used by the user. If the feeling is not deteriorated and the dust adhering to the air filter 10 is dry, it is possible to prevent the automatic cleaning operation of the air filter 10 from being excessively performed.

Further, in addition to the above-described embodiment and other embodiments, the coefficient value for multiplying the integrated time increases in proportion to the set air volume, so that the air volume mode is set to strong wind and a large amount of dust is generated in the air filter 10. If it is in a state where it is easy to adhere, the automatic cleaning operation is started at an early stage, so that it is possible to blow air according to the set air volume without deteriorating the air flowability of the air filter 10, and the usability of the user is not deteriorated. ..

In this embodiment, the predetermined value of Ta is set to 24 and compared with the calculated value, but the predetermined value of 24 is an example and can be set to an appropriate value according to various test results and the indoor environment. is there. Similarly, the predetermined value of the detected humidity has been described as 60% RH in other embodiments, but the present invention is not limited to this, and it is possible to set an appropriate value according to various test results and the indoor environment.

Further, if the dehumidifying operation mainly performed to reduce the humidity in the room can be set by the remote controller 140, when a unique coefficient value is set for the dehumidifying operation and the total value Ta of the integrated time is calculated. , The operation time of the dehumidifying operation may be multiplied by the set coefficient value and added to the integrated time of other operation modes, and it may be determined whether or not the Ta is equal to or more than a predetermined value to determine whether or not the automatic cleaning operation is performed.
When the dehumidifying operation is performed, it is estimated that the humidity in the room is high and the amount of water contained in the dust adhering to the air filter 10 is large. Therefore, a value higher than the coefficient value during the cooling operation is set as the coefficient value. By making the automatic cleaning operation start at an early stage, dust adhering to the air filter 10 can be efficiently removed.

Further, the other configurations used in the present embodiment are presented as an example, and are not intended to limit the scope of the invention, and can be implemented in various other embodiments. Various omissions, replacements, and changes can be made without departing from the gist of. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 Indoor unit 7 Suction port 8 Air outlet 9 Air passage 10 Air filter 11 Heat exchanger 12 Blower fan 19 Brush (filter cleaning means)
30 Drive gear (filter cleaning means)
41 Brush motor (filter cleaning means)
42 Feed motor (filter cleaning means)
83 Comb teeth (filter cleaning means)
127 Humidity sensor 140 Remote control 141 Operation mode switch 142 Air volume switch

Claims (3)

An indoor unit in which a suction port for sucking air and an air outlet for blowing out air are formed, an air passage formed in the indoor unit and connecting the suction port and the air outlet, and air arranged in the middle of the air passage. A heat exchanger that exchanges heat, a blower fan that blows air exchanged by the heat exchanger from the outlet, an air filter installed at the suction port to collect dust in the air, and the air filter. Filter cleaning means to scrape off dust adhering to
At least a remote controller with an operation mode switch that can be set by switching the operation mode of cooling operation and heating operation,
The integrated time in which the operation mode set by the operation mode switch of the remote control is executed is counted, and when the value obtained by multiplying the counted integrated time by a predetermined coefficient value becomes a predetermined value or more, the filter cleaning means is used. A control unit that performs an automatic cleaning operation that is automatically driven is provided. The control unit sets a coefficient value to be multiplied by the integrated time according to each operation mode set by the operation mode switch, and the cooling operation is performed. An air conditioner characterized in that the coefficient value multiplied by the integrated time in the set state is larger than the coefficient value multiplied by the integrated time in the set state of heating operation. An indoor unit in which a suction port for sucking air and an air outlet for blowing out air are formed, an air passage formed in the indoor unit and connecting the suction port and the air outlet, and air arranged in the middle of the air passage. A heat exchanger that exchanges heat, a blower fan that blows air exchanged by the heat exchanger from the outlet, an air filter installed at the suction port to collect dust in the air, and the air filter. Filter cleaning means to scrape off dust adhering to
At least a remote controller with an operation mode switch that can be set by switching the operation mode of cooling operation and dehumidification operation,
The integrated time in which the operation mode set by the operation mode switch of the remote control is executed is counted, and when the value obtained by multiplying the counted integrated time by a predetermined coefficient value becomes a predetermined value or more, the filter cleaning means is used. A control unit that automatically drives an automatic cleaning operation is provided, and the control unit sets a coefficient value to be multiplied by an integrated time according to each operation mode set by the operation mode switch, and performs the dehumidification operation. An air conditioner characterized in that the coefficient value multiplied by the integrated time in the set state is larger than the coefficient value multiplied by the integrated time in the state in which the cooling operation is set. The remote controller has an air volume switch capable of changing the rotation speed of the blower fan and setting the strength of the air volume of the air blown from the air outlet.
The control unit sets a coefficient value to be multiplied by the integrated time according to each air volume mode in which a strong wind is set by the air volume switch, and the coefficient value to be multiplied by the integrated time in a state where a strong wind is set is a weak wind. The air conditioner according to claim 1 or 2, wherein is larger than a coefficient value to be multiplied by an integrated time in a set state.

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