JP2020034196A - Air conditioner - Google Patents

Abstract

To prevent fiber waste from accumulating in a comb-tooth of a separation part 43.SOLUTION: An air conditioner includes: a case 11 in which a suction port of air is provided; a filter 31 for preventing intrusion of dust; a drive mechanism 32 for delivering the filter; a cleaning unit for cleaning the filter; a collection box for collecting the dust; and a control part. The cleaning unit includes: a brush 41 for scraping off the dust attached to the surface of the filter 31; a separation part 43 for separating the dust attached to the brush to the collection box side; and a drive motor and a brush motor. The control part includes: a filter cleaning part for actuating the drive motor and the brush motor and executing the cleaning of the filter; and a storage device for storing the number of times of the execution of filter cleaning by the filter cleaning part. When the number of times of the execution of filter cleaning is counted to be equal to or greater than a predetermined number of times X, the filter cleaning part removes the dust in the separation part by performing normal rotation and the reverse rotation of the brush alternately for a plurality of number of times Y.SELECTED DRAWING: Figure 6

Description

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

  Conventionally, in this type, an air filter disposed between an intake grill of an air conditioner and a heat exchanger, a drive unit for rotating the air filter, and dust adhering to an upstream surface of the air filter. A rotary brush for scraping off dust, a collecting case for collecting dust scraped off by the rotary brush, a ventilation passage provided on a longitudinal side surface of the collection case, and suction communicating with the ventilation passage. The air filter can be cleaned automatically by separating dust that has been scraped off by the rotating brush from the rotating brush with a slit-shaped opening attached to the rotating brush and guiding the dust to the suction device. Was. (For example, Patent Document 1)

JP 2006-71121 A

  In addition, the rotating brush is reversed, as described in paragraph 0030 of Patent Document 1, "... dust remaining in the slit can be scraped off from the slit by reversing the rotating brush." The dust is separated from the slits, but there is also a fiber-like thing in the dust. There was a problem.

  In order to solve the above problems, in the present invention, a case provided with an air suction port, a filter for preventing intrusion of dust into the case, a support for slidably supporting the filter, A drive mechanism for feeding the filter from the support, a cleaning unit for cleaning the fed filter, a collection box for collecting dust removed by the cleaning unit, and a control unit for controlling the air conditioner. The cleaning unit includes a brush for scraping dust attached to the surface of the filter that has been sent, a separating unit for separating dust attached to the brush toward the collection box, and operating the driving mechanism. A drive motor; and a brush motor for rotating the brush, wherein the control unit operates the drive motor and the brush motor to perform cleaning of the filter. A filter cleaning unit, and a storage device for storing the number of times the filter cleaning unit has performed the cleaning of the filter, wherein the filter cleaning unit counts the number of times the filter cleaning is performed a predetermined number of times X or more. By alternately performing the reverse rotation and the forward rotation of the brush Y a plurality of times, dust in the separation portion is removed.

In the present invention, by alternately performing the reverse rotation and the forward rotation of the brush a plurality of times by the filter cleaning unit, it is possible to prevent the fiber debris from being entangled and accumulated in the separation unit, and the brush is damaged by the accumulated fiber debris. Can be prevented.
Also, in the operation of removing the fiber debris by the filter cleaning unit, by setting the brush rotation speed a during the reverse rotation to be smaller than the brush rotation speed b during the forward rotation, the fiber debris separated from the brush can be reliably transferred to the collection box side. It can be guided.

1 is a perspective view of an air conditioner according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1. FIG. 3 is an enlarged sectional view around a cleaning unit of the air-conditioning apparatus shown in FIG. 2. The perspective view which shows the same brush and a guide plate. The control block diagram of the air conditioner. Explanatory drawing which shows the relationship between the rotating direction of the brush and dust. Explanatory drawing which shows the rotation direction of the brush motor at the time of the same fiber debris removal control.

  An embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawing, Fr indicates the front, Rr indicates the rear, L indicates the left, R indicates the right, Up indicates the upper side, and Dn indicates the lower side.

  FIG. 1 shows an air conditioner according to an embodiment. This air conditioner is used by hanging it on an indoor wall Wa.

  Please refer to FIG. 1 and FIG. The air-conditioning apparatus 10 includes a case 11 having a suction port 21 for introducing air on an upper surface, a fan 22 for taking indoor air into the case 11 and blowing it indoors, and a heat exchange with the air taken in by the fan 22. A plurality of heat exchangers 23, a blower opening 24 that blows air that has passed through the outer periphery of the heat exchangers 23, and is disposed above the heat exchangers 23 to prevent dust from entering the case 11. A filter unit 30; a cleaning unit 40 for cleaning the filter 31 provided in the filter unit 30; a holding unit 12 for temporarily holding the filter 31 cleaned by the cleaning unit 40; And a metal mounting plate 14 provided on the rear surface of the case 11 and fixed to the wall Wa.

  Please refer to FIG. The cleaning unit 40 includes a rotatable brush 41, a receiving portion 42 capable of holding the filter 31 together with the brush 41, and a separating portion 43 for separating dust from the brush 41.

  The receiving part 42 is formed integrally with the upper end part 15 a of the wall part 15 provided in front of the holding part 12. The receiving portion 42 extends forward and upward from the upper end portion 15 a of the wall portion 15.

  The filter unit 30 has a filter gear 32 (drive mechanism 32) for moving the filter 31. When the filter gear 32 is rotated by the drive gear 16 provided in the case 11, the filter 31 is sent backward (to the cleaning unit 40 side).

  The inner surface 31 a of the fed filter 31 is supported by the receiving portion 42. The outer surface 31b of the filter 31 contacts the tip of the brush 41. The rotating brush 41 traps dust attached to the outer surface 31 b of the filter 31. The filter 31 from which the dust has been removed is sent to the holding unit 12.

  The rotating brush 41 contacts the separating unit 43. The tip of the brush 41 is repelled by the separation unit 43, and dust adhering to the brush 41 is separated. The separated dust passes through the rear of the holding unit 12, falls into the collection box 13, and is collected. The user can remove the collection box 13 from the case 11 and discard the collected dust. The filter unit 30 has a support 33 that supports the filter 31 so that the filter 31 can be taken in and out. The support 33 is a resin molded product, is detachably attached to the case 11, and has a rail portion 34 on which the left and right ends of the filter 31 slide.

  Please refer to FIG. FIG. 4 is a perspective view showing the relationship between the guide plate 44 forming the holding portion 12 and the brush 41 (dashed line). The separating portion 43 is formed on the upper end of the guide plate 44 by resin integral molding, and has comb-like irregularities to separate dust adhered to the brush 41. By having the hole 45 below the separating portion 43, dust adhering to the brush 41 and falling to the front side is guided to the collection box 13 side.

  Please refer to FIG. The air conditioner 10 includes an indoor control unit 50 including a printed circuit board and electronic components. On the output side of the control unit 50, a fan motor 51 that rotationally drives the fan 22 at multiple speeds is provided. A drive motor 52 that rotates the filter gear 32 that slides on the filter 31, a brush motor 53 that rotates the brush 41, and an outdoor control unit 54 that controls an outdoor unit (not shown) are connected. A receiving device 56 of a remote controller 55 and a room temperature sensor 57 are connected to an input side of the control unit 50. The room temperature sensor 57 is a thermistor sensor provided near the suction port 21 and detects the temperature of the air sucked into the air conditioner 10.

  The indoor control unit 50 includes a timer 58 for measuring the operation time or the accumulated operation time of the air conditioner 10, a storage device 59 for storing the number of times of operation of the drive motor 52 or the brush motor 53, and an operation time or accumulated operation time. After reaching 24 hours (predetermined time T), the drive motor 52 and the brush motor 53 are operated to clean the filter 31, and when the number of times of cleaning the filter counts 25 (predetermined number X), the brush motor 53 A filter cleaning unit 60 that removes fiber debris entangled in the separation unit 43 by reverse rotation.

  The remote controller 55 is connected to the indoor control unit 50 by wire or wirelessly, and includes an operation unit 70 for performing various operation operations of the air conditioner 10 and a display unit 71 for displaying a setting state of the air conditioner 10. The operation unit 70 includes an operation switch 72 for starting operation of the air conditioner 10 by pressing, a cleaning switch 73 for selecting whether to perform automatic cleaning, a temperature setting switch 74 for setting a room temperature desired by the user, It has an operation mode switch 75 for selecting an operation mode such as a heating operation, a cooling operation, a dehumidification operation, and an automatic operation, and a timer switch 76 for selecting a good morning timer or a good night timer. The display unit 71 allows the user to visually check the operation modes such as the set room temperature, heating, and cooling by the liquid crystal panel, and whether automatic cleaning is selected by the cleaning switch 73.

  Please refer to FIG. (A) shows the state of dust removal during filter cleaning. As the drive motor 52 rotates, the filter 31 slides toward the holding unit 12 by the filter gear 32 and is sent. At the same time, the brush motor 53 rotates, and the brush 41 rotates in the direction indicated by the arrow (a) (forward rotation) to remove dust adhering to the outer surface 31b of the filter. When the rotating brush 41 comes into contact with the separating unit 43, dust attached to the brush 41 is separated. Part of the separated dust falls behind the holding unit 12 and falls into the collection box 13 where it is collected. Further, the remaining part remains on the back side of the comb teeth of the separation unit 43, and dust is compressed into a fiber waste (a long thread or band) along the longitudinal direction of the separation unit 43 by repeating the filter cleaning. To go. After the filter 31 is sent to the end, the drive motor 52 rotates in the reverse direction and returns the filter 31 to the normal position. The brush motor 53 continues to rotate forward until the cleaning of the filter is completed so that dust does not return to the filter 31. As a result, the filter is automatically cleaned.

  (B) shows the operation state of fiber waste removal. The fiber debris entangled with the comb teeth of the separation unit 43 and not dropping to the collection box 13 can be removed by rotating the brush 41 in the direction of the arrow (b) (reverse rotation). It is moved upward and removed. When the number of times of filter cleaning is counted 25 (predetermined number of times X), removal of fiber debris entangled in the separation unit 43 is performed by reverse rotation of the brush 41 (brush motor 53).

  Please refer to FIG. FIG. 7 shows the switching of the rotation direction of the brush 41 at the time of removing the fiber debris. The upper direction represents the normal rotation and the lower direction represents the reverse rotation with respect to 0 (base point) on the vertical axis. The horizontal axis represents time in the right direction. The rotation of the brush 41 takes about 30 seconds per rotation, and the operation of the fiber debris removal starts from the start, and the brush 41 reversely rotates by 回 転 rotation a (about 15 seconds). As a result, the fiber debris that is entangled with the comb teeth of the separation part 43 is lifted and moved upward. Thereafter, the direction of the brush 41 is changed to the normal rotation, and the fiber scraps that have floated up by one rotation b (about 30 seconds) fall to the collection box 13 side. By repeating the operation of the reverse rotation and the normal rotation five times (the predetermined number of times Y) and terminating the operation, it is possible to reliably remove fiber debris entangled with the comb teeth of the separation unit 43.

  As described above, according to the present invention, the filter cleaning unit 60 alternately performs the reverse rotation and the forward rotation of the brush 41 a plurality of times, thereby preventing fiber debris from being entangled and accumulated in the separation unit 43, It is possible to prevent the brush 41 from being damaged by accumulated fiber debris.

  Further, since the operation of removing the fiber debris is performed each time the number of times of the cleaning of the filter 31 reaches a plurality of times, the dust can be surely dropped into the collection box 13 after being collected in a fiber debris shape, When the collection box 13 is detached and handled, the scattering of fine dust can be reduced.

  Further, in the operation of removing the fiber debris by the filter cleaning unit 60, the brush rotation speed a during the reverse rotation is made smaller than the brush rotation speed b during the normal rotation, so that the fiber debris separated from the brush 41 is reliably collected in the collection box. 13 can be guided.

In the present embodiment, the reverse rotation and the forward rotation of the brush 41 are indicated by the number of rotations, but the rotation angle and the rotation time may be substituted. Further, the predetermined number X, the predetermined number Y, and the predetermined time T can be arbitrarily set according to the product.
In addition, other configurations used in the present embodiment are presented as examples, and are not intended to limit the scope of the invention, and may be embodied in other various forms. Various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 10 Air conditioner 11 Case 12 Holding part 22 Fan 23 Heat exchanger 31 Filter 32 Filter gear (drive mechanism 32)
41 brush 43 separation unit 50 indoor control unit 60 filter cleaning unit

Claims (2)

A case provided with an air inlet, a filter for preventing intrusion of dust into the case, a support for slidably supporting the filter, a drive mechanism for feeding the filter from the support, A cleaning unit for cleaning the fed filter, a collection box for collecting dust removed by the cleaning unit, and a control unit for controlling the air conditioner,
The cleaning unit has a brush that scrapes dust attached to the surface of the filter that has been sent,
A separating unit that separates dust attached to the brush toward the collection box,
A drive motor that operates the drive mechanism;
A brush motor for rotating the brush,
The control unit, a filter cleaning unit that performs the cleaning of the filter by operating the drive motor and the brush motor,
A storage device that stores the number of times the filter cleaning unit has performed the cleaning of the filter,
The filter cleaning unit removes dust from the separation unit by alternately performing the reverse rotation and the forward rotation of the brush a plurality of times Y when the number of times of cleaning of the filter is counted a predetermined number of times X or more. And air conditioner.   2. The air conditioner according to claim 1, wherein the filter cleaning unit sets the brush rotation speed a during reverse rotation to be smaller than the brush rotation speed b during normal rotation. 3.

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