JP2013088085A - Indoor unit of ceiling embedded type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sliding properties of a filter in a curved section of a guide rail for guiding the movement of the filter and to prevent the generation of abnormal sound in an indoor unit of a ceiling embedded type air conditioner having an filter automatic cleaning function capable of performing a cleaning operation while moving the filter.SOLUTION: In the indoor unit 100 of ceiling embedded type air conditioner arranged on indoor ceiling, a filter automatic cleaning mechanism 50 for moving a filter by filter rollers is equipped with a lower guide rail groove 20 and an upper guide rail groove 21 which guide both side edges of the filter and have a U-shaped cross section, an upper groove curved section 21b is formed at the end of a side far from the filter roller of the upper guide rail groove 21, and an emboss treatment S is applied onto a lower surface 21bk of upper groove curved section in the upper groove curved section 21b.

Description

  The present invention relates to an indoor unit of a ceiling-embedded air conditioner, and more particularly to an indoor unit of a ceiling-embedded air conditioner having a filter automatic cleaning mechanism.

  An indoor unit of a ceiling-embedded air conditioner is installed on the ceiling of the room, and cools or heats the air by sucking the room air from the suction port by a fan installed inside and passing it through the heat exchanger. Thus, temperature adjustment or humidity adjustment (hereinafter referred to as “harmony”) is performed, and air harmonized (hereinafter referred to as “harmonic air”) is blown out from the air outlet to circulate the room air.

A filter is installed in the suction port to prevent dust and other floating substances (hereinafter referred to as “dust”) from entering the room air from entering the inside and contaminating the heat exchanger and the like. Therefore, when the ceiling-embedded air conditioner is continuously operated, dust adheres to the filter and accumulates, and the filter is clogged. If it did so, ventilation resistance increased, and it resulted in the deterioration of operation efficiency and the energy-saving property.
Moreover, since the indoor unit of the ceiling-embedded air conditioner is attached to a ceiling at a high place, cleaning the filter has been a difficult task using a stepladder or the like.

  For this reason, many technical proposals have been made regarding an automatic filter cleaning function that eliminates difficult manual work and can automatically remove dust accumulated on the filter (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 6-18073 (page 2-3, FIG. 2)

In the automatic filter cleaning function disclosed in Patent Document 1, a roller gear that meshes with a filter gear formed in a filter is formed, and is substantially in contact with the filter roller disposed on one side of the suction port and the lower end (south pole) of the filter roller. And a horizontal guide rail disposed parallel to the ceiling surface, and an inclined guide rail that is substantially in contact with the upper end (north pole) of the filter roller and is inclined toward the approximate center of the horizontal guide rail.
Therefore, during operation of the ceiling-embedded air conditioner, substantially the entire length of both side edges of the filter is supported by the horizontal guide rail and covers the entire area of the suction port. On the other hand, when the filter roller is rotated (forward rotation) and automatic cleaning is started, the filter is pulled out to the filter roller side by the rotation of the filter gear (forward rotation), and one end edge of both side edges of the filter is an inclined guide. Invade the rail and eventually enter the horizontal guide rail. In addition, a substantially half range near one end of both sides of the filter is supported by the horizontal guide rail, and a substantially half range near the other end of both sides of the filter is supported by the inclined guide rail. The filter roller stops rotating and starts reverse rotation.
During the normal rotation and reverse rotation, the brush pressed against the filter scrapes off dust adhering to the filter.

Therefore, the filter automatic cleaning function disclosed in Patent Document 1 enables the dust attached to the filter to be automatically scraped off without human intervention.
However, when one edge of both side edges of the filter passes through the inclined guide rail and enters the horizontal guide rail, the filter is bent back and the tip of the filter gear closest to one edge (the peak of the peak) May be caught by being pressed against the horizontal guide rail. At this time, since the force to move the filter is stronger than the hooking force (frictional resistance), the filter moves while the hook is released, but an abnormal noise may be generated when the hook is released. In addition, such catches (abnormal noise) are not limited to the filter gear closest to one edge, but may occur one after another in the filter gear that follows this, so the occurrence of such catches (abnormal noise) is suppressed. There was a request to want.
In addition, in order to suppress the noise, applying grease to a range where the inclined guide rails of the horizontal guide rail substantially intersect (corresponding to a curved portion) increases the cost because it takes time to apply, When the effect of the grease has been lost, it is necessary to apply the grease again, so that an inexpensive and permanent means for restraining the catch has been demanded.

  The present invention meets the above-described requirements, and an object of the present invention is to slide a filter on a guide rail that guides the movement of the filter in an indoor unit of a ceiling-embedded air conditioner having an automatic filter cleaning function. It is possible to improve the performance and suppress the occurrence of abnormal noise.

  An indoor unit of a ceiling-embedded air conditioner according to the present invention includes a housing whose bottom surface is open when installed in an embedded state on the ceiling side of an air-conditioned space, and is disposed in the housing Blower, a decorative panel installed on the lower surface side of the housing and having a suction port, an automatic filter cleaning mechanism provided between the decorative panel and the blower, and the automatic filter cleaning mechanism And a substantially square plate-like filter having flexibility, wherein the filter automatic cleaning mechanism section is (1) a filter guide for guiding the movement of the filter during automatic cleaning, (2 ) A filter roller for moving the filter; (3) a brush for scraping or scraping off floating matter collected by the filter; (4) a comb for scraping off the floating matter scraped by the brush; Brush and front A dust box for storing the suspended matter scraped off by a comb, and the filter guide has a pair of substantially U-shaped guide rail grooves into which both side edges of the filter enter, and the guide rail groove A slidability improving means is applied to a part or all of the above.

  In the indoor unit of a ceiling-embedded air conditioner according to the present invention, slidability improving means (texture processing or the like) is applied to part or all of the guide rail groove forming the filter guide of the filter automatic cleaning mechanism. This facilitates the movement (sliding) of the filter, so that even when a curved portion is formed in the filter movement path, the filter is prevented from being caught. Therefore, it is possible to suppress an abnormal noise that occurs when the catch is released. Moreover, since the slidability of the filter is improved without applying grease, an increase in cost can be suppressed.

The perspective view which shows the installation condition of the indoor unit of the ceiling embedded type air conditioner which concerns on Embodiment 1 of this invention. Sectional drawing of the planar view which shows the whole explaining the indoor unit shown in FIG. Sectional drawing of the side view which shows the whole explaining the indoor unit shown in FIG. The perspective view which decomposes | disassembles and shows the whole explaining the indoor unit shown in FIG. The perspective view which extracts and shows the filter automatic cleaning mechanism part of the indoor unit shown in FIG. The perspective view which shows the filter automatic cleaning mechanism part of the indoor unit shown in FIG. The perspective view which decomposes | disassembles and shows the filter automatic cleaning mechanism part of the indoor unit shown in FIG. 1, the perspective view which shows a filter, and the side view which expands. Sectional drawing explaining operation | movement of the filter automatic cleaning mechanism part of the indoor unit shown in FIG. Sectional drawing explaining operation | movement of the filter automatic cleaning mechanism part of the indoor unit shown in FIG. The perspective view and sectional drawing of a side view which show the range which gives an embossing to the upper guide rail groove | channel of the indoor unit shown in FIG. The perspective view which expands and shows a part of filter automatic cleaning mechanism part in the indoor unit of the ceiling embedded type air conditioner concerning Embodiment 2 of this invention. Sectional drawing of the side view which expands and shows a part of filter automatic cleaning mechanism part in the indoor unit shown in FIG. The sectional view of the perspective view and side view which expand and show a part of filter automatic cleaning mechanism part in the indoor unit of the ceiling-embedded air conditioner according to Embodiment 3 of the present invention. FIG. 14 is a cross-sectional view in side view and a cross-sectional view in side view showing a part of the automatic filter cleaning mechanism in the indoor unit shown in FIG. The perspective view which expands and shows a part of filter automatic cleaning mechanism part in the indoor unit of the ceiling embedded type air conditioner which concerns on Embodiment 4 of this invention.

  Hereinafter, the first to fourth embodiments will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same site | part or a corresponding site | part, and one part description is abbreviate | omitted. Each figure is drawn typically and the present invention is not limited to the illustrated form.

[Embodiment 1]
1 to 10 illustrate an indoor unit of a ceiling-embedded air conditioner according to Embodiment 1 of the present invention. FIG. 1 is a perspective view showing an installation state, and FIG. 2 is a plan view showing the whole. 3 is a side sectional view showing the whole, FIG. 4 is an exploded perspective view showing the whole, FIG. 5 is a perspective view showing an extracted component (filter automatic cleaning mechanism), FIG. 7 is a perspective view showing a component (filter automatic cleaning mechanism), FIG. 7 (a) is an exploded perspective view showing the component (filter automatic cleaning mechanism), and FIG. 7 (b) is a component (filter). FIG. 7C is a side view showing a part of the constituent member (filter) in an enlarged manner, and FIGS. 8 and 9 are side views for explaining the operation of the constituent member (filter automatic cleaning mechanism). 10A and 10B are cross-sectional views as viewed, and the component member (upper guide rail groove) is subjected to a graining process. Perspective view of a scope and a cross-sectional view of a side view.

(Indoor unit)
FIG. 1 is a perspective view of a state in which an indoor unit (hereinafter referred to as “indoor unit”) 100 of a ceiling-embedded air conditioner is attached to a ceiling 46 of a room (same as an air-conditioned space) 45 from the room 45. It is.
In FIG. 1, the unit housing 1 of the indoor unit 100 is installed in a state where it is embedded in the ceiling 46 of the room 45 and a substantially rectangular decorative panel 7 provided at the lower part of the indoor unit 100 can be seen.
Near the center of the decorative panel 7, a substantially rectangular grill 18 is arranged, and around the grill 18, there are four outlets 8 along each side (four sides) of the decorative panel 7. The air outlet 8 is provided with a vane 9 for controlling the direction of the blown air.
The grill 18 communicates with an air suction port (bell mouth 4 to be described later) to the indoor unit 100, functions as a main body suction port, and imparts design properties to the indoor unit 100. Moreover, the blower outlet 8 is connected to the main body blower path 40 mentioned later (refer FIG. 3).

In FIG. 4, the indoor unit 100 has the following components.
(A) Unit housing 1,
(B) Filter automatic cleaning mechanism 50 (stored in casement 11),
(C) The decorative panel 7 (the grill 18 is disposed).
However, FIG. 4 is an example, and the automatic filter cleaning mechanism 50 may be provided in the unit housing 1 or may be provided in the decorative panel 7.
If the automatic filter cleaning mechanism 50 is housed in the casement 11 that is separate from the unit housing 1 and the decorative panel 7, the automatic filter cleaning can be performed later (as an option) on an existing indoor unit. The mechanism part 50 can be attached.

(A: Unit housing)
In FIG. 3, the unit housing 1 is installed on the ceiling 46, has a box shape (outer is a regular square tube) with one surface (lower surface) opened, and the opened lower surface is disposed substantially on the same surface as the ceiling 46. And a fan having a heat exchanger 5 and a fan motor 3 for driving the fan 2. A blower is arrange | positioned in the approximate center part in the unit housing | casing 1 (refer FIGS. 2-4).

(fan)
In FIG. 3, a blower (centrifugal blower) including a fan 2 (turbo fan) having a suction port on the lower side and a fan motor 3 for driving the fan 2 is disposed at a substantially central portion in the unit housing 1. The A fan motor 3 is attached to the top side of the unit housing 1, and a bell mouth 4 for introducing air into the fan 2 is disposed below the fan 2.

(Heat exchanger)
Further, a heat exchanger 5 (substantially C-shaped in plan view) is arranged in a substantially annular shape so as to surround the fan 2, and a drain pan 6 is installed below the heat exchanger 5. The heat exchanger 5 constitutes a refrigeration cycle together with a compressor or the like that compresses a refrigerant installed in an outdoor unit (not shown). In the heat exchanger 5, the indoor air sucked by the fan 2 via the grille 18 and the refrigerant that executes the refrigeration cycle exchange heat to harmonize (cool or heat, dehumidify or humidify) the indoor air. To produce conditioned air.

(Air outlet)
On the outer side along each side of the drain pan 6, a main body blowing path 40 that communicates the secondary side of the heat exchanger 5 and the room is disposed, and the main body blowing path 40 communicates with the outlet 8 of the decorative panel 7. .
A vane 9 is attached to the air outlet 8 so that the direction of the conditioned air generated by the heat exchanger 5 can be adjusted. The shape of the vane 9 is substantially the same as that of the air outlet 8, and the vane 9 is designed in consideration of design so that the air vane 9 is substantially closed when the vane 9 is closed.

(C: makeup panel)
A substantially square grill 18 is attached to the opening at the substantially center of the decorative panel 7. The grill 18 is engaged with the decorative panel 7 by, for example, a claw (not shown).

(B: Automatic filter cleaning mechanism)
The configuration of the automatic filter cleaning mechanism 50 will be described with reference to FIGS.
3 to 5, a casement 11 having an upper surface and a lower surface opened (same as a square tube having a square cross section) is attached to a lower portion of the unit housing 1, and an automatic filter cleaning mechanism 50 is installed therein. Has been. However, a form in which the filter automatic cleaning mechanism 50 is installed in the unit housing 1 is also possible, and the unit housing 1 and the separate casement 11 are not essential components.

3, 6, and 7 (a), the filter automatic cleaning mechanism 50 includes a pair of parallel members (hereinafter referred to as “guide rails”) 51 parallel to the moving direction of the filter 12, and a pair of It is a frame formed by a perpendicular member 52 that connects the ends of the guide rails 51 and includes the following components.
(B1) filter 12,
(B2) filter guide 13,
(B3) Filter roller 14,
(B4) Brush 15,
(B5) Comb 16,
(B6) Dust box 17,
(B7) Gearbox 19,
(B8) Lower guide rail groove 20 and upper guide rail groove 21,
(B9) Upper filter sensor 22a and lower filter sensor 22b,
The filter guide 13 is installed in a guide rail (parallel member) 51, and the lower guide rail groove 20 and the upper guide rail groove 21 are formed in the guide rail 51. The upper filter sensor 22 a and the lower filter sensor 22 b are installed on a guide rail (parallel member) 51. Hereinafter, each component will be described.

(B1: filter)
7 (b) and 7 (c), the filter 12 captures suspended matter in the air sucked from the grill 18 (suction port), and has a substantially rectangular plate shape and is flexible. The filter 12 includes a filter face member 12d having an opening (aperture) of a predetermined size, a plurality of filter vertical bars 12a on which the filter face member 12d is installed, and a plurality of filter horizontal bars 12b. Yes. In other words, the range of the filter face member 12d excluding the portion that abuts on the filter vertical beam 12a and the filter horizontal beam 12b forms the filter part. For convenience of explanation, the lattice shape formed by the filter vertical beam 12a and the filter horizontal beam 12b is referred to as a “filter lattice shape”.
Further, the pair of filter vertical bars 12a located on the side edges are provided with filter gears 12c in a rack shape. The shape of the filter gear 12c is not limited. For example, the filter gear 12c has a crest having a circular arc section and a trough having a circular arc section.

  Since the filter vertical beam 12a and the filter horizontal beam 12b of the filter 12 slide on the filter guide 13 and move in a U-turn manner, it is necessary to have flexibility and flexibility so that the filter 12 is easily bent. . For this reason, the thermoplastic elastomer resin is used so that the breaking strength is maintained even when the thickness is reduced, and the resin is not whitened or broken when folded. However, this inexpensive thermoplastic elastomer resin is mainly used in which a small amount of a rubber component is dispersed in order to provide flexibility and flexibility. For this reason, the frictional resistance of the surface is larger than that of a general ABS resin.

(B2: Filter guide)
The filter guide 13 is disposed above the intermediate guide grid 13c and a filter guide intermediate guide grid (hereinafter referred to as “intermediate guide grid”) 13c for guiding (regulating movement) the vertical direction (vertical direction) of the filter 12. A filter guide upper guide lattice (hereinafter referred to as “upper guide lattice”) 13a, a filter guide lower guide lattice (hereinafter referred to as “lower guide lattice”) 13b disposed below the intermediate guide lattice 13c, A filter guide folding guide grid (hereinafter referred to as “folding guide grid”) 13d for inverting the moving direction of the filter 12, and a pair of guide rails 51 for guiding the side edges (direction perpendicular to the moving direction) of the filter 12; Formed from.

(Upper guide grid etc.)
Except during automatic cleaning, the filter 12 is disposed between the intermediate guide lattice 13c and the lower guide lattice 13b so as to be movable in the horizontal direction. During automatic cleaning, the filter 12 is provided with the upper guide lattice 13a and the intermediate guide lattice 13c. (This will be described in detail separately).
In the state where the indoor unit 100 (filter automatic cleaning mechanism 50) is installed on the ceiling 46, at least the upper surface of the lower guide grid 13b is horizontal (parallel to the ceiling 46). Is level.

The upper guide lattice 13a, the intermediate guide lattice 13c, and the lower guide lattice 13b are substantially square frame shapes in plan view, and are lattice shapes formed by vertical and horizontal beams, respectively. Since the lattice shapes (intervals between the vertical beams and intervals between the horizontal beams) are the same (hereinafter referred to as “guide lattice shape”), the upper guide lattice 13a, the intermediate guide lattice 13c, and the lower guide The vertical beam and the horizontal beam that form the lattice 13b overlap each other in plan view.
Further, during the air-conditioning operation, the vertical beam and the horizontal beam forming the intermediate guide lattice 13c and the lower guide lattice 13b in the state where the filter 12 is disposed between the intermediate guide lattice 13c and the lower guide lattice 13b, respectively, It overlaps with the filter vertical beam 12a and the filter horizontal beam 12b in plan view. That is, since the guide grid shape is the same as the filter grid shape, the filter vertical beam 12a or the filter horizontal beam 12b in the filter 12 is appropriately deleted (thinned out).

  Further, the interval between the upper guide lattice 13a and the intermediate guide lattice 13c and the interval between the intermediate guide lattice 13c and the lower guide lattice 13b are not limited, but the filter 12 is movable to the extent that it can move (slide). Therefore, the filter 12 can be stored stably. In addition, as described above, the vertical beam and the horizontal beam overlap each other in plan view, and there is nothing to block the suction air into the filter portion of the filter 12, so that the air resistance is small. Further, the risk of scratching the filter portion of the filter 12 is reduced.

  The folded guide lattice 13d has a vertical beam having an arcuate cross section that forms a predetermined distance from the outer peripheral surface of the filter roller 14. Accordingly, the filter 12 moves between the folded guide lattice 13d and the outer peripheral surface of the filter roller 14. Further, the tip of the brush 15 protrudes toward the filter roller 14 from the gap between the vertical bars forming the folded guide lattice 13d.

(B3: Filter roller)
A cylindrical filter roller 14 is provided on one side of the filter guide 13 on the moving direction side of the filter 12 (same as one of the sides without the guide rail 51) in parallel with the side. The filter roller 14 moves (reciprocates) the filter 12 and presses the filter 12 against the brush 15 (presses the pressure). A roller gear (pinion, not shown) that meshes with the filter gear 12 c is formed on the outer periphery near both ends of the filter roller 14.

(B4: brush)
A brush 15 is provided adjacent to the filter roller 14 and obliquely below the filter roller 14 (see FIG. 3). The brush 15 is installed so as to be parallel to the filter roller 14, pressed against the moving filter 12, and scrapes or scrapes off dust collected by the filter 12.
Although the form of the brush 15 is not limited, For example, it is comprised by winding the flocking tape 24 around the aluminum pipe 23 helically (refer Fig.7 (a), FIG.8 and FIG.9). The brush 15 scrapes off the suspended matter collected by the filter 12.

(B5: Comb)
The comb 16 removes dust adhering to the brush 15 while being scraped off from the brush 15, and is installed obliquely below the brush 15 (on the opposite side of the filter roller 14).
The tip of the comb 16 is installed in a position in parallel with the brush 15 (brush rotation shaft or hair tip) and in contact with the hair tip of the brush 15 (see FIGS. 3, 8, and 9).
The setting posture of the comb 16 is not limited. For example, the comb 16 is displaced by a predetermined distance parallel to the radiation from the rotation axis of the brush 15 (a straight line passing through the rotation axis) and opposite to the rotation direction of the brush 15 ( If it is offset, the scraped dust adhering to the brush 15 can be efficiently scraped off.

(B6: Dust box)
A substantially cuboid dust box 17 is attached below the comb 16. It is detachably installed at a position for receiving dust that has fallen from the filter 12 and the brush 15 (see FIGS. 3, 8, and 9).

(B7: Gearbox)
In FIG. 6, a filter roller rotation shaft (not shown) of the filter roller 14 and a brush rotation shaft 33 of the brush 15 (see FIG. 7, the same as the aluminum pipe 23 shown in FIG. 8) are at one end of each. The roller motor 26a and the brush motor 26b are connected to each other via a provided gear (not shown). The filter roller rotation shaft and the brush rotation shaft 33 are installed with a predetermined offset in the vertical direction.
That is, the filter roller 14 is driven by a roller motor 26a via a gear (not shown), and the brush 15 is driven by a brush motor 26b via a gear.
And the gear is covered with the gear box 19, The roller motor 26a and the brush motor 26b are installed in the outer side.
In the present invention, the drive mode of the filter roller 14 and the brush 15 is not limited to the above mode. For example, the filter roller 14 and the brush 15 may be directly coupled to the roller motor 26a and the brush motor 26b without using a gear. The other motor may be removed, and the rotation of the other unit may be transmitted to the filter roller 14 and the brush 15 via a gear.

(B8: Lower guide rail groove and upper guide rail groove)
8 and 9, the lower guide rail groove 20 and the upper guide rail groove 21 are U-shaped grooves formed in the pair of guide rails 51, respectively, and are parallel to the decorative panel 14 and lower. The guide rail groove 20 is substantially in contact with the lower end (south pole) of the filter roller 14, and the upper guide rail groove 21 is substantially in contact with the upper end (north pole) of the filter roller 14.
The lower guide rail groove 20 has a height at which both end portions (the filter gear 12c is formed) of the filter 12 disposed between the intermediate guide lattice 13c and the lower guide lattice 13b can respectively enter. A lower surface (hereinafter referred to as a “lower groove linear portion lower surface”) 20ak forming a linear portion (hereinafter referred to as a “lower groove linear portion”) 20a of the guide rail groove 20 is connected to the upper surface of the lower guide grid 13b and the height direction. The positions are almost the same.
On the other hand, the upper guide rail groove 21 has a height at which both end portions (where the filter gear 12c is formed) of the filter 12 disposed between the upper guide lattice 13a and the intermediate guide lattice 13c can enter. The lower surface (hereinafter referred to as “upper groove straight portion lower surface”) 21ak that forms the straight portion (hereinafter referred to as “upper groove straight portion”) 21a of the upper guide rail groove 21 has a height higher than the upper surface of the intermediate guide lattice 13c. The direction position is almost the same.

The upper guide rail groove 21 has a substantially arcuate shape in a side view in the vicinity of the upper groove linear portion 21a and the end of the upper groove linear portion 21a opposite to the filter roller 14, and gradually curves upward as it approaches the end portion. Part (hereinafter referred to as “upper groove curved part”) 21b. In addition, in the range close to the filter roller 14 of the upper groove linear part 21a, the curved part smoothly connected to the folded grating 13d is provided, but such a curved part may be omitted.
Similarly, the lower guide rail groove 20 includes a straight lower groove straight portion 20a and a curved portion (in the vicinity of the end of the lower groove straight portion 20a opposite to the filter roller 14 on the opposite side, gradually upward as it approaches the end. (Hereinafter referred to as “lower groove curved portion”) 20b. The lower groove straight portion 20a is longer than the upper groove straight portion 21a. The formation of the lower groove curved portion 20b may be omitted.
The lower guide rail groove 20 and the upper guide rail groove 21 are parallel to each other and have a U-turn type that forms a forward path and a return path, respectively (see FIGS. 3, 8, and 9).

(B9: upper filter sensor and lower filter sensor)
In the upper guide rail groove 21, an upper filter sensor 22a (for example, a limit switch or the like) is located near the end point (upper groove curved portion start end 21c where the upper groove curved portion 21b starts) on the opposite side of the filter roller 14 of the upper groove linear portion 21a. A lower filter sensor 22b (for example, a limit switch) is installed in the lower guide rail groove 20 near the end of the lower groove linear portion 20a opposite to the filter roller 14 (the lower groove curved portion start end 20c where the lower groove curved portion 20b starts). Etc.) are installed.

When the upper filter sensor 22a detects one end of the filter 12, the rotation of the filter roller 14 is stopped when a certain time (for example, about 30 seconds) has elapsed since the detection. That is, one end of the filter 12 continues to move forward even after the position of the upper filter sensor 22a, stops in a state where it reaches the vicinity of the upper groove curved portion end 21d of the upper guide rail groove 21, and the filter 12 The forward movement will be completed (this will be described in detail separately).
When the lower filter sensor 22b detects the other end of the filter 12, the rotation of the filter roller 14 is stopped when a certain time (for example, about 30 seconds) has elapsed since the detection. That is, the other end of the filter 12 continues to move in the return path even after the position of the lower filter sensor 22b, and reaches the vicinity of the lower groove curved portion starting end 20c where the lower groove curved portion 20b of the lower guide rail groove 20 starts. This stops and the movement of the filter 12 in the return path ends (this will be described in detail later).

(Move filter)
Based on FIGS. 8 and 9, the mechanism in which the filter roller 14 moves (reciprocates) the filter 12 in the automatic filter cleaning mechanism 50 will be described in detail. In addition, description of the mechanism in which the brush 15 of the filter automatic cleaning mechanism unit 50 scrapes off dust adhering to the filter 12 is omitted.

(Move the filter forward)
Next, the movement state of the filter 12 during automatic cleaning will be described with reference to FIG.
Before starting automatic cleaning of the filter 12 (for example, during air conditioning), the filter 12 is disposed in the lower guide rail groove 20 (between the intermediate guide lattice 13c and the lower guide lattice 13b) and excludes both side edges of the filter 12. In the state where most of the range is placed on the upper surface of the lower guide lattice 13 b, both side edges of the filter 12 enter the lower guide rail groove 20.
One end of the filter 12 is guided by the folded guide lattice 13d. That is, at one end portion of the filter 12, both side edges are clamped by the folding guide 13d and roller gears (not shown) provided at both ends of the filter roller 14, and the filter gear 12c (see FIG. 7). And the roller gear are engaged.

Accordingly, when the filter automatic cleaning mechanism 50 performs automatic cleaning, the filter roller 14 rotates when the roller motor 26a is rotated. Therefore, when the filter roller 14 is rotated clockwise in the figure, the filter 12 is moved to the right. If the filter roller 14 is moved in the direction (starts moving in the forward direction) and, on the contrary, the filter roller 14 is rotated in the counterclockwise direction, the filter 12 moves in the left direction (starts moving in the return path).
Therefore, when the filter 12 starts to move in the right direction (starts moving in the forward direction), the filter 12 is guided by the folding guide lattice 13d, and first, the bending range at one end (left side in the figure) is expanded. Appears in a substantial J shape in side view. When further moved, one end enters the upper guide rail groove 21 (between the upper guide grid 13a and the intermediate guide grid 13c).
That is, the bent position is moved to the center of the filter 12 and the already bent range is bent back into a flat shape, so that the entire filter 12 has a substantially U shape in a side view (not shown). ).

  In FIG. 8B, the movement of the forward path advances, the filter 12 has a substantially J shape in a side view, and an upper filter sensor 22 a (for example, a limit switch or the like) installed in the upper guide rail groove 21 One end is detected. Thereafter, the filter roller 14 continues to rotate for a fixed time (for example, about 30 seconds) or the integral rotation number.

In FIG. 8C, after the upper filter sensor 22a detects one end of the filter 12, the filter roller 14 stops rotating when a certain time (for example, about 30 seconds) elapses. That is, one end of the filter 12 reaches the vicinity of the upper groove curved portion end 21d of the upper guide rail groove 21, and the forward movement of the filter 12 is completed.
That is, when one end of the filter 12 slides on the folded guide lattice 13d, it is bent into an arc shape with the filter gear 12c on the inside, and when sliding on the upper groove linear portion 21a, When it is bent back into a flat shape and further slides on the upper groove curved portion 21b, the filter gear 12c is bent outward.
At this time, since only a limited range close to one end is bent so that the filter gear 12c is on the outside, only a limited number of filter gears 12c are pressed against the upper groove curved portion 21b. Therefore, even if a catch (abnormal noise) occurs, the number of the catches is small (as described later, since the embossing is applied, the occurrence of the catch itself is suppressed).
The filter gear 12c at the other end of the filter 12 meshes with the roller gear.

(Move back on the filter)
In FIG. 9A, the return path of the filter 12 starts to move. At this time, the filter roller 14 is rotated counterclockwise in the drawing by the roller motor 26a. Since the roller gear provided on the filter roller 14 meshes with the filter gear 12 c formed on the filter 12, the filter 12 starts moving in the return path by the rotation of the filter roller 14.

In FIG. 9B, when the return path of the filter 12 continues, the lower filter sensor 22 b installed in the lower guide rail groove 20 detects the other end of the filter 12.
Then, after a predetermined time has elapsed after the detection, the rotation of the filter roller 14 is stopped, and the return path movement is completed. That is, the operation of the automatic filter cleaning mechanism unit 50 ends (in the case of automatic cleaning by a plurality of reciprocating movements, the next forward movement starts).
When the lower filter sensor 22b is installed at the end of the lower groove linear portion 20a opposite to the filter roller 14 (position close to the position where the lower groove curved portion 20b starts), the lower filter sensor 22b is connected to the filter 12. When the other end is detected, the rotation of the filter roller 14 is stopped, and the movement of the return path is completed.

(Texturing)
In FIG. 10A, the upper groove curved portion 21b of the upper guide rail groove 21 is provided with a texture S (shaded line) used for the design surface of the plastic part in the range from the upper groove curved portion start end 21c to the upper groove curved portion end 21d. Are shown as “slidability improving means”.
That is, when the thermoplastic elastomer resin is used for the filter 12 as described above, particularly when the flat surface is smooth, the frictional resistance of the surface becomes larger than that of a general ABS resin. In the vicinity, the filter gear 12c is pressed against the upper groove curved portion 21b (more precisely, the lower surface of the upper groove curved portion 21b (hereinafter referred to as “lower surface of the upper groove curved portion”) 21bk), and the hook is generated (FIG. 10B). In order to avoid contact, the fine groove of the upper groove curved portion lower surface 21bk is provided so that the gear surface of the filter gear 12c of the filter 12 and the upper groove curved portion lower surface 21bk are not in close contact with each other.
Accordingly, since the apparent friction coefficient of the upper groove curved portion lower surface 21bk is reduced, the filter gear 12c is restrained from being caught on the upper groove curved portion lower surface 21bk, so that the noise generated when the catch is released is also suppressed.

  The embossing S applied to the upper groove curved portion lower surface 21bk may be uniform embossing S from the upper groove curved portion start end 21c to the upper groove curved portion end 21d, or the processing roughness (the density of convex portions or concave portions per unit area). , And the distance between the apex of the convex portion and the bottom point of the concave portion) may be gradually changed. For example, the textured S of the upper groove curved portion start end 21c is roughened, and the finer textured S is gradually made toward the upper groove curved portion end 21d without causing the filter gear 12c to float from the upper groove curved portion end 21d. This makes it possible to further move the sound to an abnormal noise.

In the above, the embossing S is performed only on the lower groove curved portion lower surface 21bk, but the present invention is not limited to this, and the bottom surface of the upper groove curved portion 21b (a surface parallel to the opening of the U-shaped cross section). (Hereinafter referred to as “upper groove curved portion bottom surface”) 21 bt is subjected to a graining S to reduce the apparent friction coefficient between the side surface of the filter gear 12 c of the filter 12 and the upper groove curved portion bottom surface 21 bt, thereby reducing the frictional resistance. It may be small. Further, an upper surface of the upper groove curved portion 21b (hereinafter, referred to as “upper groove curved portion upper surface”) 21bj is subjected to an embossing process, and apparent friction between the surface of the filter 12 where the filter gear 12c is not formed and the upper groove curved portion upper surface 21bj The coefficient may be reduced and the frictional resistance may be reduced. Further, the surface of the folded guide grating 13d on the filter roll 14 side may be subjected to a texture process.
In the above, the upper guide rail groove 21 is subjected to the embossing S. However, instead of the upper guide rail groove 21 or together with the upper guide rail groove 21, the gear surface of the filter gear 12c may be embossed. .

  Furthermore, although the above has shown the case where the upper guide rail groove 21 and the lower guide rail groove 20 are parallel, the present invention is not limited to this, for example, the upper guide rail groove 21 and the lower guide rail Even if the groove 20 intersects and a part of the lower guide rail groove 20 also serves as a part of the upper guide rail groove 21 (for example, see Patent Document 1), Good. That is, at the position where the upper guide rail groove 21 and the lower guide rail groove 20 intersect, the filter 12 is deformed in the same manner as the deformation in the upper groove curved portion 21b (bending deformation so that the filter gear 12c is on the outside). Further, the lower surface of the lower guide rail groove 20 (lower groove linear portion 20a) may be subjected to embossing in a predetermined range including the intersecting portion. If it does so, it will become possible to move the filter 12 smoothly and generation | occurrence | production of unusual noise can be suppressed.

[Embodiment 2]
FIGS. 11 and 12 illustrate an indoor unit of a ceiling-embedded air conditioner according to Embodiment 2 of the present invention. FIG. 11 is an enlarged view of a part of a constituent member (filter automatic cleaning mechanism). FIG. 12 is a side sectional view showing an enlarged part of a component (filter automatic cleaning mechanism). In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted.
11 and 12, an indoor unit (hereinafter referred to as “indoor unit”) 200 of a ceiling-embedded air conditioner has a draft angle of the upper groove curved portion lower surface 21 bk of the upper groove curved portion 21 b formed on the guide rail 51. (Same as the drawing taper) is made larger than the draft of the upper groove curved portion upper surface 21bj.
That is, a mold for molding a plastic part is usually given a draft of about 1 ° (θj≈1 ° in FIG. 12) so that the part can be easily removed from the mold after molding. On the other hand, in the indoor unit 200, the draft angle of the upper groove curved portion lower surface 21bk is made larger than usual (θk≈3 ° to 5 ° in FIG. 12), and the filter gear 12c of the filter 12 contacts the upper groove curved portion lower surface 21bk. The normal load acting on the upper groove curved portion lower surface 21bk at the time of contact is reduced (the tangential load in the direction of the draft is increased). Therefore, the frictional resistance can be reduced, the filter gear 12c of the filter 12 can be smoothly moved without being caught, and the occurrence of abnormal noise can be suppressed. Furthermore, since the upper groove curved portion 21b can be easily removed from the mold, the life of the mold can be extended. That is, the large draft angle functions as “slidability improving means”.

[Embodiment 3]
FIGS. 13 and 14 illustrate an indoor unit of a ceiling-embedded air conditioner according to Embodiment 3 of the present invention. Each (a) is a component (automatic filter cleaning mechanism). The perspective view which expands and shows a part, Each (b) is sectional drawing of the side view which expands and shows a part of structural member (filter automatic cleaning mechanism part). In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted.
In FIG. 13, an indoor unit (hereinafter referred to as “indoor unit”) 301 of a ceiling-embedded air conditioner has a depth (depth) of the upper groove curved portion 21b of the upper guide rail groove 21 of the upper groove linear portion 21a. The depth is smaller than the depth (more precisely, only the depth of the upper groove curved portion lower surface 21bk is made smaller, and the depth of the upper groove curved portion upper surface 21bj is the same as the depth of the upper groove linear portion 21a).
Therefore, like the indoor unit 100 (Embodiment 1) and the indoor unit 200 (Embodiment 2), the filter gear 12c of the filter 12 and the upper groove curved portion lower surface 21bk slide smoothly, and the filter gear of the filter 12 12c can be smoothly moved without being caught, and the generation of abnormal noise can be suppressed.

  14, the indoor unit (hereinafter referred to as “indoor unit”) 302 of the ceiling-embedded air conditioner has a depth (depth) of the upper groove curved portion 21b of the upper guide rail groove 21 that is the upper groove curved portion start end 21c. And smoothly changes from the upper groove curved portion end 21d. That is, in the indoor unit 302, the depth of the upper groove curved portion lower surface 21bk of the upper groove curved portion 21b is the smallest at the upper groove curved portion start end 21c (the depth is shallow), and gradually increases toward the upper groove curved portion end 21d. . For this reason, the filter gear 12c of the filter 12 can be moved smoothly without being lifted from the upper guide rail groove 21, and the occurrence of abnormal noise can be suppressed. That is, making the depth shallow (narrowing) functions as “slidability improving means”.

[Embodiment 4]
FIG. 15 illustrates an indoor unit of a ceiling-embedded air conditioner according to Embodiment 4 of the present invention, and is an enlarged perspective view showing a part of a constituent member (filter automatic cleaning mechanism). is there. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted.
In FIG. 15, an indoor unit (hereinafter referred to as “indoor unit”) 400 of a ceiling-embedded air conditioner is provided with a sleeve bearing 60 in the middle of the upper groove curved portion 21 b of the upper guide rail groove 21. The central axis of the sleeve bearing 60 is parallel to the rotation axis of the filter roller 14 and is installed on the guide rail 51.
That is, the guide rail 51 is rotatably installed on a cylindrical boss 21e integrally formed at a position lower than the lower groove curved portion lower surface 21bk of the guide rail 51, and the outer peripheral surface of the guide rail 51 is formed on the lower surface of the upper groove curved portion. Projecting in the direction of the upper groove curved portion upper surface 21bj from 21bk. For this reason, the upper groove curved portion lower surface 21bk between the guide rail 51 and the upper groove curved portion terminal end 21d is located below or obliquely below the protruding portion of the outer peripheral surface of the guide rail 51.

The sleeve bearing 60 rotates in a driven manner when the filter 12 moves along the upper groove curved portion 21 b and the filter gear 12 c contacts the outer peripheral surface of the sleeve bearing 60.
In this way, in the indoor unit 400, the sleeve bearing 60 that rotates following the movement of the filter 12 is provided in the middle of the upper groove curved portion 21b, so that the outer peripheral surface of the sleeve bearing 60 becomes the upper groove curved portion 21b (more precisely, , Part of the upper groove curved portion lower surface 21bk), the contact between the filter gear 12c and the upper groove curved portion lower surface 21bk in the sleeve bearing 60 and the vicinity thereof is eliminated, the frictional resistance can be reduced, and the filter gear 12c of the filter 12 is It becomes possible to move smoothly without being caught, and the occurrence of abnormal noise can be suppressed. That is, the sleeve bearing 60 functions as “slidability improving means”.

  In the above description, the sleeve bearing 60 is provided at one location near the upper groove curved portion start end 21c of the upper guide rail groove 21, but the present invention is not limited to this, and the sleeve bearing 60 is closer to the upper groove curved portion end 21d. You may install in two or more places.

[Other embodiments]
As described above, in the first to fourth embodiments, the means for reducing the frictional resistance in the upper groove curved portion 21b of the upper guide rail groove 21 has been described. However, the present invention is not limited to this, and the upper guide rail is not limited thereto. Means for reducing the frictional resistance may be provided in other portions of the groove 21 (for example, a range close to the filter roller 14 of the upper groove linear portion 21a) or the lower guide rail groove 20.
Moreover, you may combine Embodiment 1-Embodiment 4 suitably. That is, for example, the embossing S may be applied to the upper groove curved portion lower surface 21bk having a larger draft angle.

  1 Unit housing, 2 fan, 3 fan motor, 4 bell mouth, 5 heat exchanger, 6 drain pan, 7 decorative panel, 8 air outlet, 9 vane, 11 casement, 12 filter, 12a filter vertical rail, 12b filter side Crosspiece, 12c Filter gear, 12d Filter face material, 13 Filter guide, 13a Upper guide lattice, 13b Lower guide lattice, 13c Intermediate guide lattice, 13d Folding guide lattice, 14 Filter roller, 15 Brush, 16 Comb, 17 Dust box, 18 Grill , 19 Gear box, 20 Lower guide rail groove, 20a Lower groove straight portion, 20ak Lower groove straight portion lower surface, 20b Lower groove curved portion, 20c Lower groove curved portion start end, 21 Upper guide rail groove, 21a Upper groove straight portion, 21ak Lower upper groove straight portion lower surface, 21b Upper groove curved portion, 21 bj Upper groove curved part upper surface, 21bk Upper groove curved part lower surface, 21bt Upper groove curved part bottom surface, 21c Upper groove curved part starting end, 21d Upper groove curved part terminal, 21e Boss, 22a Upper filter sensor, 22b Lower filter sensor, 23 Aluminum pipe, 24 Flocking tape , 26a roller motor, 26b brush motor, 33 brush rotation shaft, 40 main body outlet, 45 chamber, 46 ceiling, 50 filter automatic cleaning mechanism, 51 guide rail (parallel member), 52 right angle member, 60 sleeve bearing, 100 indoor units (Embodiment 1), 200 indoor units (Embodiment 2), 301 indoor units (Embodiment 3), 302 indoor units (Embodiment 3), 400 indoor units (Embodiment 4), S Texture processing.

Japanese Patent Laying-Open No. 2010-32194 (page 10-12, FIG. 10)

Claims (7)

When installed in an embedded state on the ceiling side of the air-conditioned space, a casing having an open bottom surface, a blower disposed in the casing, and a lower surface side of the casing for suction. A decorative panel in which a mouth is formed, an automatic filter cleaning mechanism provided between the decorative panel and the blower, and a substantially rectangular shape having flexibility, which is movably disposed in the automatic filter cleaning mechanism. With a plate-like filter,
The filter automatic cleaning mechanism is
(1) a filter guide for guiding the movement of the filter during automatic cleaning;
(2) a filter roller for moving the filter;
(3) a brush that scrapes or scrapes off suspended matter collected by the filter;
(4) a comb that scrapes off the suspended matter scraped off by the brush;
(5) A dust box for storing the suspended matter scraped off by the brush and the comb;
Have
The filter guide has a pair of substantially U-shaped guide rail grooves into which both side edges of the filter invade, and slidability improving means is applied to a part or all of the guide rail grooves. An indoor unit for ceiling-embedded air conditioners. The indoor unit of a ceiling-embedded air conditioner according to claim 1, wherein a curved portion having a substantially arc-shaped cross section is formed in at least one terminal portion of the guide rail groove,
An indoor unit for a ceiling-embedded air conditioner, wherein at least one surface of the guide rail groove is textured in the curved portion.   The indoor unit of a ceiling-embedded air conditioner according to claim 2, wherein the embossing is gradually finer as it is closer to the one end. Indoor unit. The indoor unit of a ceiling-embedded air conditioner according to claim 1, wherein a curved portion having a substantially arc-shaped cross section is formed in at least one terminal portion of the guide rail groove,
In the curved portion, at least one surface of the pair of opposed surfaces of the guide rail groove is not parallel to the rotation axis of the filter roller, and an interval between the pair of surfaces is the guide rail groove. An indoor unit of a ceiling-embedded air conditioner that is inclined so as to become smaller toward the back. The indoor unit of a ceiling-embedded air conditioner according to claim 1, wherein a curved portion having a substantially arc-shaped cross section is formed in at least one terminal portion of the guide rail groove,
An indoor unit of a ceiling-embedded air conditioner characterized in that a rotatable sleeve bearing is provided in the curved portion.   The indoor unit of a ceiling-embedded air conditioner according to claim 5, wherein the sleeve bearing is installed on one surface side of a pair of opposed surfaces forming the guide rail groove, and an outer peripheral surface of the sleeve bearing is An indoor unit of a ceiling-embedded air conditioner that protrudes to the other surface side of a pair of opposed surfaces that form the guide rail groove. The indoor unit of a ceiling-embedded air conditioner according to any one of claims 1 to 6,
The guide rail groove includes a lower guide rail groove substantially in contact with the lower end of the filter roller and substantially parallel to the decorative panel, and an upper guide rail groove substantially in contact with the upper end of the filter roller and substantially parallel to the decorative panel. An indoor unit of a ceiling-embedded air conditioner characterized by comprising:

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