JPWO2019030814A1 - Air conditioning indoor unit - Google Patents

Abstract

The air-conditioning indoor unit is provided at an air suction port, and has a filter in which rack gears are formed at both ends, and supports both ends of the filter. A supporting frame having a beam portion connecting the parts, a driving gear rotatably attached to the supporting frame, meshing with one of the rack gears to transmit a rotational force to the filter, and a shaft fixed to the driving gear and rotating the filter. And a gear stopper attached to the beam portion and a gear stopper for restricting the drive gear from moving toward the other rack gear.

Description

  The present invention relates to an air-conditioning indoor unit having a filter cleaning device for cleaning a filter.

  BACKGROUND ART Conventionally, an air-conditioning indoor unit having a filter cleaning device for automatically cleaning a filter has been known. The filter is provided, for example, at a suction port of an air-conditioning indoor unit, and removes dust contained in air sucked from the suction port. As a result, dust gradually accumulates in the filter, and the amount of air sucked from the suction port decreases. For this reason, it is necessary to periodically clean the filter, but in order to save the trouble of cleaning, an air conditioning indoor unit having a filter cleaning device for automatically cleaning the filter has been proposed. In the filter cleaning device, for example, rack gears are formed at both ends of the filter, and rotational force from a motor is transmitted to the filter via a driving gear meshed with the rack gear. Thereby, the filter is transported, and the surface of the filter is cleaned by the brush. Patent Literature 1 discloses an indoor unit of an air conditioner in which a positional relationship between a driving gear of a brush driving motor and a driven gear of a brush is maintained by a lock member.

JP 2010-65894 A

  However, in the indoor unit of the air conditioner disclosed in Patent Literature 1, the drive gear that meshes with the rack gear of the filter and transmits the rotational force to the filter is not positioned with respect to the shaft on which the filter rotates. Shafts tend to vary in axial length when they are manufactured. If the shaft and the drive gear are fixed without positioning the shaft and the drive gear, if the length of the shaft varies, the contact area of the teeth between the drive gear and the rack gear decreases. As a result, excessive stress acts on the tooth tip, and the tooth may be broken. In addition, when the engagement between the drive gear and the rack gear shifts, the transmission of the rotational force becomes unstable.

  The present invention has been made to solve the above-described problems, and provides an air-conditioning indoor unit that suppresses a shift in a meshing position between a drive gear and a rack gear even when the length of a shaft varies. Things.

  The air-conditioning indoor unit according to the present invention is provided at the air suction port, a filter in which a rack gear is formed at both ends, supports both ends of the filter, and a pair of support portions that support the transport of the filter. A support frame having a beam portion connecting the pair of support portions, a drive gear rotatably attached to the support frame, meshing with one of the rack gears and transmitting rotational force to the filter, and a filter fixed to the drive gear; The filter cleaning device includes a shaft serving as an axis around which the shaft rotates, and a gear stopper attached to the beam portion and configured to restrict movement of the drive gear toward the other rack gear.

  According to the present invention, the gear stopper restricts the movement of the drive gear meshing with one rack gear of the filter toward the other rack gear. For this reason, the meshing position of the drive gear and the rack gear is fixed regardless of the length of the shaft. Therefore, even if the length of the shaft varies, the displacement of the meshing position between the drive gear and the rack gear can be suppressed.

It is an exploded perspective view showing the air-conditioning indoor unit 1 according to Embodiment 1 of the present invention. It is a side view which shows the air-conditioning indoor unit 1 in Embodiment 1 of this invention when the side plate of the housing | casing 7 is removed. It is a perspective view which shows the filter cleaning device 8 in Embodiment 1 of this invention. It is a side view which shows the filter cleaning device 8 when seeing through from the side in Embodiment 1 of this invention. FIG. 2 is a perspective view illustrating an outer shell structure portion 21 and a motor housing portion 22 according to Embodiment 1 of the present invention. FIG. 4 is an enlarged side view showing a main part of the filter cleaning device 8 when seen through from the side in the first embodiment of the present invention. It is a perspective view showing the inside of filter cleaning device 8 in Embodiment 1 of the present invention. It is a side view showing the inside of filter cleaning device 8 in Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view around a drive gear 35 of the filter cleaning device 8 according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a beam part 42 according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a shaft 34 and a drive gear 35 according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a beam part 42 according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a gear stopper 36 according to Embodiment 1 of the present invention. FIG. 14 is a perspective view of the gear stopper 36 according to Embodiment 1 of the present invention as viewed from a direction different from FIG. 13. FIG. 4 is a perspective view illustrating an operation of a gear stopper 36 according to Embodiment 1 of the present invention. FIG. 4 is a perspective view illustrating an operation of a gear stopper 36 according to Embodiment 1 of the present invention. FIG. 4 is a top view illustrating an operation of a gear stopper according to the first embodiment of the present invention.

Embodiment 1 FIG.
Hereinafter, an embodiment of an air-conditioning indoor unit according to the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an air-conditioning indoor unit 1 according to Embodiment 1 of the present invention. FIG. 2 is an air-conditioning indoor unit when a side plate of a housing 7 is removed in Embodiment 1 of the present invention. FIG. As shown in FIGS. 1 and 2, the air-conditioning indoor unit 1 is provided indoors and adjusts indoor air, and includes a base 2, a blower fan 3, a heat exchanger 4, and a drain pan assembly. 5, an electrical component 6, a housing 7, and a filter cleaning device 8.

  The base 2 constitutes the back side of the air-conditioning indoor unit 1, and is attached to, for example, an indoor wall. The blower fan 3 is attached to the base 2, takes in indoor air from an air inlet 7 a formed on the upper surface of the air-conditioning indoor unit 1, and blows air from an air outlet 7 b formed at a lower front portion of the air-conditioning indoor unit 1. Let out. The heat exchanger 4 is attached to the base 2 and exchanges heat between the room air taken in by the blower fan 3 and the refrigerant. The drain pan assembly 5 is attached to the base 2 and receives a condensate falling from the heat exchanger 4. The drain pan assembly 5 is provided at an air outlet 7 b of the air-conditioning indoor unit 1 and adjusts a vertical blowing direction of air. And a wind direction adjusting plate 5a.

  The electric component 6 is a member to which a control device for controlling the air conditioning indoor unit 1 and the like are attached. The housing 7 is a design component that is attached to the base 2 and forms the front and side surfaces of the air-conditioning indoor unit 1. In the air-conditioning indoor unit 1, the indoor air sucked from the suction port 7a by the blower fan 3 exchanges heat with the refrigerant by the heat exchanger 4 to become cool air or warm air. Then, the cool air or the warm air is blown out from the blow-out port 7b by adjusting the vertical blow-out direction by the vertical wind direction adjusting plate 5a.

  FIG. 3 is a perspective view showing the filter cleaning device 8 according to Embodiment 1 of the present invention, and FIG. 4 is a side view showing the filter cleaning device 8 when seen through from the side in Embodiment 1 of the present invention. It is. The filter cleaning device 8 is located at the suction port 7a and automatically cleans the filter 23. As shown in FIGS. 3 and 4, the filter cleaning device 8 includes an outer shell structure 21, a motor housing 22, a filter 23, a dust box 24, and a cleaning unit 25.

  FIG. 5 is a perspective view showing the outer shell structure 21 and the motor housing 22 according to Embodiment 1 of the present invention. As shown in FIG. 5, the outer shell structure 21 is a frame-like member that forms the outer shell, and is detachably attached to the suction port 7 a side of the air-conditioning indoor unit 1. The motor housing 22 is a member attached to the center of the outer shell structure 21 in the width direction, and houses a motor (not shown) inside. Note that first motor gears 26 are attached to both sides of the motor housing 22, and the first motor gears 26 transmit rotational torque from a motor to a drive gear 35 (see FIG. 6). Further, second motor gears 27 are attached to both sides of the motor housing 22, and the motor transmits a rotational torque to the cleaning unit 25 via the second motor gear 27.

  The filter 23 is attached to the upper surface side of the outer shell structure 21, and suppresses dust contained in air that is formed in a mesh shape and passes through the inside of the air-conditioning indoor unit 1. Note that toothed rack gears 23a are formed at both ends of the filter 23 (see FIG. 6). The dust box 24 is a box-shaped member attached to the lower part of the front surface, and collects dust collected by the cleaning unit 25 inside. The dust box 24 is provided with a disposal port 24a for discarding dust accumulated inside (see FIG. 6).

  FIG. 6 is an enlarged side view showing a main part of the filter cleaning device 8 when seen through from the side in the first embodiment of the present invention. As shown in FIG. 6, the cleaning unit 25 is for cleaning dust and the like adhered to the filter 23, and includes a brush 31, a saw blade 32, a support frame 33, a shaft 34, a drive gear 35, a gear And a stopper 36. The brush 31 is provided at a position where the filter 23 is conveyed, swings up and down, comes into contact with the filter 23, and collects dust adhering to the filter 23. Here, a brush gear 31a is attached to the brush 31, and the brush gear 31a is meshed with the second motor gear 27, and the brush 31 swings by rotating torque from the motor. As described above, the second motor gear 27 transmits the rotational torque from the motor to the brush 31 via the brush gear 31a. The saw blade 32 is provided inside the dust box 24 and at both ends of the oscillating brush 31, and removes dust collected by the brush 31 from the brush 31.

  FIG. 7 is a perspective view showing the inside of the filter cleaning device 8 according to Embodiment 1 of the present invention, and FIG. 8 is a side view showing the inside of the filter cleaning device 8 according to Embodiment 1 of the present invention. FIG. 9 is a cross-sectional view around the drive gear 35 of the filter cleaning device 8 according to Embodiment 1 of the present invention. The support frame 33 supports both ends of the filter 23, and both ends of the shaft 34 are rotatably mounted. The support frame 33 includes a pair of left and right support portions 41, a beam portion 42, and a pair of left and right gear holding portions 43. are doing. The support section 41 supports the transport of the filter 23. The support part 41 is formed with a storage part 41a that guides and winds and stores the filter 23 when the filter 23 is transported, and a gear insertion part 41b into which the drive gear 35 is inserted.

  FIG. 10 is a perspective view showing the beam part 42 according to Embodiment 1 of the present invention. As shown in FIG. 10, the beam part 42 connects the pair of support parts 41. The beam portion 42 has two rails 42a, 42a extending in the rotation axis direction of the shaft 34 at the ends. The number of rails 42a of the beam portion 42 may be one, or three or more. Further, one rail 42a of the beam portion 42 has a claw-shaped locking portion 42b extending toward the other rail 42a. The gear holding portion 43 is provided outside the pair of support portions 41, and has a boss portion 43a protruding inward.

  FIG. 11 is a perspective view showing shaft 34 and drive gear 35 according to Embodiment 1 of the present invention. As shown in FIG. 11, the shaft 34 is fixed to the drive gear 35 and serves as an axis around which the filter 23 rotates. The shaft 34 has a convex cross section. The drive gears 35 transmit torque to the filter 23 and are provided at both ends of the shaft 34. Inside the drive gear 35, an insertion hole 35a having an uneven shape is formed. When the shaft 34 is inserted into the insertion hole 35a, the concave portion of the insertion hole 35a and the cross-sectional convex shape of the shaft 34 are fitted, and the drive gear 35 and the shaft 34 are fixed without rotating.

  The drive gear 35 has a motor gear 51 and a filter gear 52. The motor gear 51 meshes with the first motor gear 26, and the rotation torque from the motor is transmitted to the drive gear 35 by the first motor gear 26 and the motor gear 51, and the drive gear 35 rotates, and the shaft 34 also rotates. Rotate. Here, the motor is provided only on one drive gear 35 side. When the shaft 34 rotates, the other drive gear 35 to which the rotational torque is not directly transmitted from the motor also rotates. The filter gear 52 meshes with the rack gear 23a of the filter 23. When the drive gear 35 rotates, the filter 23 on which the rack gear 23a meshed with the filter gear 52 rotates. As a result, the filter 23 is conveyed and wound up in the storage portion 41 a of the support portion 41 of the support frame 33.

  FIG. 12 is a perspective view showing the beam portion 42 according to Embodiment 1 of the present invention. A circular insertion hole 35b having a circular cross section is formed on the motor gear 51 side of the drive gear 35 (see FIG. 9), and as shown in FIG. By being inserted into the circular insertion hole 35b, the rotation center position of the shaft 34 is determined.

  Here, the operation of cleaning the filter will be described. During the operation of the air-conditioning indoor unit 1, when room air is sucked from the suction port 7 a, dust contained in the room air adheres to the filter 23. In order to remove dust adhering to the filter 23, the filter cleaning device 8 operates periodically. When the motor operates, the first motor gear 26 rotates, and the motor gear 51 of the drive gear 35 that meshes with the first motor gear 26 rotates. Then, the filter gear 52 of the drive gear 35 also rotates, and the rack gear 23a of the filter 23 meshing with the filter gear 52 rotates. As a result, the filter 23 is conveyed and wound up in the storage portion 41 a of the support portion 41 of the support frame 33. When the motor operates, the second motor gear 27 also rotates, the brush gear 31a meshing with the second motor gear 27 rotates, and the brush 31 swings.

  When the filter 23 is transported, as shown in FIG. 6, the dust adhering to the filter 23 is raked by the brush 31 swinging and coming into contact with the filter 23. When the brush 31 swings, the brush 31 comes into contact with the saw blade 32 inside the dust box 24, and the dust collected by the brush 31 is scraped off from the brush 31, and the dust falls by gravity. Thus, dust adhering to the filter 23 is stored on the bottom surface of the dust box 24. Note that the stored dust is easily discarded by removing the dust box 24 and opening the disposal port 24a.

  FIG. 13 is a perspective view illustrating the gear stopper 36 according to the first embodiment of the present invention, and FIG. 14 is a perspective view illustrating the gear stopper 36 according to the first embodiment of the present invention as viewed from a different direction from FIG. is there. As shown in FIGS. 13 and 14, the gear stopper 36 is a member that is attached to the beam portion 42 (see FIG. 7) and restricts the drive gear 35 from moving toward the other rack gear 23a. The gear stopper 36 has a main body 61, a bridge 62, a claw 63, and a rib 64. The main body 61 is two plate-like members arranged in parallel. A cutout 61a is formed in one plate-shaped member of the main body 61. The engagement of the locking portion 42b provided on the rail 42a of the beam portion 42 of the support frame 33 with the notch portion 61a suppresses the movement of the gear stopper 36 in the width direction with respect to the beam portion 42.

  The bridging portion 62 is a member that connects one end portions of two plate-shaped members of the main body portion 61 to each other. The gear stopper 36 restricts the drive gear 35 meshing with one rack gear 23a from moving toward the other rack gear 23a, and the drive gear 35 slightly moves toward the one rack gear 23a. Allow. That is, a space is left between the drive gear 35 and the gear holding portion 43 of the support frame 33 so that the drive gear 35 slightly moves toward the one rack gear 23a.

  The claw portion 63 is a member that protrudes from the other ends of the two plate members of the main body 61 in a direction perpendicular to the plate members. The claw portion 63 is hooked on the lower surface of the two rails 42a of the beam portion 42 of the support frame 33 (see FIG. 8). As described above, the gear stopper 36 is disposed astride the two rails 42a. Thereby, the gear stopper 36 is attached to the beam portion 42, and the gear stopper 36 is prevented from moving in the vertical direction with respect to the beam portion 42. Thereby, the gear stopper 36 is slidably attached to the beam portion 42. When the beam 42 has one rail 42a, the claw 63 is hooked on the lower surface of the single rail 42a. Thus, the number of the claws 63 may be any. The rib 64 is a plate-like member that protrudes vertically from one plate-like member of the main body 61, and contacts the end face 35 c of the drive gear 35 (see FIG. 7).

  FIGS. 15 and 16 are perspective views showing the operation of the gear stopper 36 according to the first embodiment of the present invention, and FIG. 17 is a top view showing the operation of the gear stopper 36 according to the first embodiment of the present invention. . The operation of the gear stopper 36 will be described with reference to these drawings. As shown in FIG. 15, first, the gear stopper 36 is attached to the beam 42 of the support frame 33. The gear stopper 36 is attached to the beam 42 by hooking the claw 63 of the gear stopper 36 on the lower surface of the two rails 42 a of the beam 42 of the support frame 33.

  Then, as shown in FIG. 16, when the gear stopper 36 is slid toward the one rack gear 23a, the rib 64 of the gear stopper 36 comes into contact with the end face 35c of the drive gear 35, and the drive gear 35 is moved toward the one rack gear 23a. Press When the gear stopper 36 is slid, the main body 61 of the gear stopper 36 hits the locking portion 42b of the beam 42 as shown in FIG. Then, the main body 61 deforms toward the shaft 34, and eventually, the main body 61 gets over the locking portion 42 b, and the locking portion 42 b fits into the notch 61 a of the main body 61. Thus, the gear stopper 36 does not move toward the other rack gear 23a. Accordingly, the drive gear 35 whose end surface 35c is pressed by the rib 64 of the gear stopper 36 does not move to the other rack gear 23a. That is, the movement of the drive gear 35 toward the other rack gear 23a is restricted. In this manner, by sliding the gear stopper 36, the drive gear 35 can be pushed and shifted to a proper position.

  According to the first embodiment, the gear stopper 36 restricts the movement of the drive gear 35 meshing with one rack gear 23a of the filter 23 toward the other rack gear 23a. For this reason, the engagement position between the drive gear 35 and the rack gear 23a is fixed regardless of the length of the shaft 34. Therefore, even if the length of the shaft 34 varies, the displacement of the meshing position between the drive gear 35 and the rack gear 23a can be suppressed. For this reason, the rotational torque from the motor is stably transmitted to the filter 23 via the drive gear 35 and the rack gear 23a.

  In the first embodiment, the drive gear 35 and the brush 31 are rotated by a common motor, but the drive gear 35 and the brush 31 may be configured to be rotated by different motors.

  DESCRIPTION OF SYMBOLS 1 Air-conditioning indoor unit, 2 bases, 3 blast fans, 4 heat exchangers, 5 drain pan assemblies, 5a vertical wind direction adjustment plates, 6 electrical components, 7 housings, 7a suction ports, 7b outlets, 7c drain pans, 8 filters Cleaning device, 21 outer shell structure portion, 22 motor storage portion, 23 filter, 23a rack gear, 24 dust box, 24a disposal port, 25 cleaning portion, 26 first motor gear, 27 second motor gear, 31 brush, 31a for brush Gear, 32 saw blade, 33 support frame, 34 shaft, 35 drive gear, 35a insertion hole, 35b circular insertion hole, 35c end face, 36 gear stopper, 41 support portion, 41a storage portion, 41b gear insertion portion, 42 beam portion , 42a rail, 42b locking portion, 43 gear holding portion, 43a boss portion, 51 motor gear, 52f Filter gear, 61 body, 61a notch, 62 bridge, 63 claw, 64 rib.

The air-conditioning indoor unit according to the present invention is provided at the air suction port, a filter in which rack gears are formed at both ends, supports both ends of the filter, and a pair of support portions that support the transport of the filter. A support frame having a beam portion connecting the pair of support portions, a drive gear rotatably mounted on the support frame, meshing with one of the rack gears to transmit rotational force to the filter, and a filter fixed to the drive gear, a shaft but which is the axis of rotation, mounted on the beam portion, possess a gear stopper that restricts the drive gear is moved to the other of the rack gear side, a filter cleaning apparatus including a beam portion is in the direction of the rotational axis It has two extending rails, and the gear stopper is disposed straddling the two rails .

Claims (4)

A filter provided at the air suction port and having rack gears formed at both ends,
A support frame that supports both ends of the filter, and a pair of support portions that support the transport of the filter, and a beam portion that connects the pair of support portions,
A drive gear rotatably attached to the support frame and meshing with one of the rack gears to transmit a rotational force to the filter;
A shaft fixed to the drive gear and serving as an axis around which the filter rotates;
A gear stopper attached to the beam portion, for restricting the drive gear from moving to the other rack gear side;
An air-conditioning indoor unit having a filter cleaning device comprising: The beam portion has two rails extending in a rotation axis direction,
The gear stopper,
The air-conditioning indoor unit according to claim 1, wherein the indoor unit is disposed across the two rails. The beam portion has a locking portion,
A cutout is formed in the gear stopper,
The air-conditioning indoor unit according to claim 1 or 2, wherein the gear stopper is fixed to the beam by fitting the locking portion into the notch. The gear stopper,
The air-conditioning indoor unit according to any one of claims 1 to 3, which is slidably attached to the beam portion in a rotation axis direction.

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