JP3519236B2 - Indoor unit of air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner arranged behind a ceiling, and more particularly to an improvement in a support structure of a filter provided on a decorative panel. 2. Description of the Related Art As an indoor unit of an air conditioner, a type arranged behind a ceiling tends to be frequently used. With this kind of indoor unit, there is no feeling of oppression at all and the necessary air conditioning action can be obtained without deteriorating the aesthetic appearance. [0003] In this kind of indoor unit, a ceiling facing surface of a unit body arranged behind the ceiling is open, and a decorative panel is fitted therein. The unit body or the decorative panel is selectively provided with a suction port and a discharge port, and is open to the room to be air-conditioned. An indoor heat exchanger is disposed obliquely at a position facing the suction port in the unit body.
A cross flow fan (blower) is arranged at a position facing the outlet. [0005] A suction grill is fitted into the suction port, and a filter is removably attached to the suction grill so as to overlap with the suction grill. Therefore, immediately before the air to be conditioned is sucked from the suction grill into the unit body, dust contained in the sucked air is captured by the filter and removed from the air. [0006] When such an air conditioner is operated for a long time, the filter catches a predetermined amount or more of dust, and as a result, the filter is clogged and the ventilation resistance is reduced. Increase, causing a decrease in heat exchange capacity. Therefore, the user must clean the filter every predetermined period. For this operation, the user mounts the vehicle on a stepping board, a stepladder, or the like, removes the filter mounting portion of the decorative panel, and places the panel on a floor or the like where work is easy. [0008] The old filter is removed therefrom, and the captured dust is removed by appropriate means such as washing. After replacing the filter with a new filter, lift the filter mounting portion of the decorative panel again and fit it into the unit body. [0009] Therefore, most of the work is performed on a step ladder, a stepladder, or the like, and an unstable posture is reached in which the hand is extended to the ceiling surface. Therefore, it is desirable to extend the period in which the filter is clogged as much as possible to further reduce the frequency of the filter replacement operation. [0010] However, since the filter has only the same area as the suction port, the filter is easily clogged at an early stage, and the filter replacement cycle is fast and troublesome. If this operation is left unchecked, the heat exchange efficiency will be significantly reduced, adversely affecting the air conditioning performance. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ceiling-mounted type, which can extend the life of a filter, reduce the frequency of filter replacement work , and facilitate the operation. it is intended to provide an indoor unit of an air conditioner to obtain a relief of labor turned into. [0012] In order to satisfy the above object, the indoor unit of the air conditioner of the present invention is arranged behind a ceiling.
The unit body is an outlet to which the outlet duct is connected.
It is disposed inside and is inclined in an inverted C shape when viewed from the side
And a pair of indoor heat exchangers facing each other
Housing the blower, etc., and the decorative panel is the unit body
The filter mounting part is configured as a bottom panel
And one side in the longitudinal direction is rotatable
The other side in the longitudinal direction is freely openable and closable as a free end
Almost vertical from the position of the decorative panel construction surface
Can be rotated until the filter becomes
A pair of inlets along the sides and an inlet
And the indoor heat exchanger
A filter that supports the filter almost parallel to the mounting angle of the heat exchanger
Filter support, the filter support being the filter support.
It is formed to a width larger than the thickness and accommodates the filter detachably
The guide and filter are elastically pressed against one side of the guide
It has a pressing means for holding. By adopting the means for solving the above problems, the area of the filter is increased and a longer life can be obtained. together, sure the filter, and safely be supported, yet good workability during replacement. Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. 1 and 2 show an indoor unit of an air conditioner. In the drawings, reference numeral 21 denotes a unit main body formed in a rectangular box shape whose lower surface is open. A receiving member 22 protrudes from an outer surface of a side surface portion 21a along a lateral direction of the unit main body 21 and is hooked by a hanging bolt (not shown) that is vertically suspended from the back of a cabin or the like. The lower opening of the unit body 21 is closed by a decorative panel 24. The decorative panel 24 is exposed from the ceiling A to the room to be air-conditioned R, but the unit main body 21 excluding the decorative panel 24 is mounted to protrude from the ceiling A to the space above the ceiling W. Further, a plurality of outlets 25 are respectively opened on both side portions 21a. These outlets 2
5 is connected to an outlet duct 26 extending to a predetermined portion. A pair of indoor heat exchangers 27 and a pair of blowers 2 are provided in the internal space chambers of the unit body 21.
8 are opposed to each other. The indoor heat exchanger 27
Are arranged close to each other along both side portions 21b in the longitudinal direction of the unit body 21. To be more specific, the indoor heat exchanger 27 is inclined so that the upper end is on the outside and the lower end is on the inside. In particular, as shown in FIG. When viewed, both indoor heat exchangers 27 are inclined in an inverted C shape. Each blower 28 is connected to each other's indoor heat exchanger 27.
And the axial direction thereof is along the short direction of the unit body 21 which is a direction orthogonal to the longitudinal direction of the indoor heat exchanger 27. The blowers 28 include a fan motor FM fixed to the unit body 21 by a support 30 and a sirocco fan F attached to a rotation shaft of the fan motor FM.
And the positions of the fan motor and the fan are arranged left and right reversed in plan view. The sirocco fan F has a characteristic of sucking in from the axial direction and blowing out in the circumferential direction. The indoor heat exchangers 27 are arranged to face each other in the respective suctioning directions. 25. A filter 29 is provided between each indoor heat exchanger 27 and the unit body side surface 21b. These filters 29 are inclined so as to be substantially parallel to the indoor heat exchanger 27 with a predetermined gap therebetween, and are removably attached via the filter support portion 1 provided on the filter attachment portion 24b. . At the lower end of each indoor heat exchanger 27, a drain pan 31 is arranged to receive drain water generated by condensation in each indoor heat exchanger 27. A substrate 32 is integrally provided between the drain pans 31. On the other hand, the decorative panel 24 has a pair of suction ports 33 opened. These suction ports 33 have a rectangular shape and are provided along the inside of the longitudinal side surface 21 b of the unit main body 21. Since the decorative panel 24 is exposed inside the room, the suction port 33 provided here opens into the room R. In other words, the indoor heat exchanger 27 and the filter 29 are disposed in a ventilation path S formed between the suction port 33 and the outlet 25 by the blowing action of the blower 28. . As shown only in FIG. 1A, a space 34 having a narrow height direction is formed between the drain pan 31 and the substrate 32 and the decorative panel 24. An opening / closing drive mechanism 35 for opening and closing the filter mounting portion 24b is provided. The decorative panel 24 will be described further. The decorative panel 24 has a peripheral frame 24a, a suction port 33 surrounded by the peripheral frame 24a, and the filter 29.
Are mounted via the filter support portion 1, and the central panel portion 24 which is surrounded by the filter mounting portion 24b and houses the opening / closing drive mechanism 35.
c. One side of the filter mounting portion 24b in the longitudinal direction is connected to the peripheral end frame portion 24a via a pivot 36. One end of a pair of wires 37 is connected to both sides of the side opposite to the pivot 36. The other end of the wire 37 extends to the opening / closing drive mechanism 35. At four corners of the filter mounting portion 24b, suction reinforcing plates 40 for reinforcement are provided, and magnets 47 are provided at both suction reinforcing plates 40 on the free end side. Peripheral end frame 24a facing these magnets 47
A magnetic member 48 magnetically attracted to the magnet 47 is provided at the site.
Is attached. Although not shown, the opening / closing drive mechanism 35 includes a drive pulley, a driven pulley, a belt body wrapped endlessly between these pulleys, and a drive source for rotating the drive pulley. , The pivot 3 described above
6 and a wire 37. A fixing device is provided at a predetermined portion of the belt body, and is attached and fixed thereto in a state where the other end of the wire 37 is bundled. The drive pulley is integrally provided with a worm gear, which meshes with a worm fitted on a rotating shaft of a motor as a drive source. As the motor, a DC motor with a built-in planetary gear and a rotatable forward / reverse rotatable brush that prevents rotation from the output shaft is employed. The filter support 1 is made of, for example, ABS.
Alternatively, it is made of a PS-type mold resin material and configured as shown in FIG. That is, the filter mounting portion 2
The base 2 has an L-shaped cross section which is attached and fixed to the base 4b, and a guide portion 3 which is integrally provided on the rising side surface of the base. The guide portion 3 is substantially U-shaped as a whole, and its central axis cL is inclined at a predetermined angle (substantially the same as the inclination angle of the indoor heat exchanger 27).
The distance between the upper end portions of the side walls 3 and 3b is expanded to some extent based on the intermediate portion, and is expanded to some extent from the intermediate portion to the bottom portion, that is, the intermediate portion is narrowed. The edge of the intermediate portion of one of the side walls 3b is separated from the base 2 and bent inward toward the opposing side wall 3a, and the lower edge of the side wall 3b is cut off from the lower portion of the side wall. ing. In particular, the bent portion in the middle portion of the side wall is called a pressing portion 4. The pressing portion 4 is a means for elastically contacting the filter 29 inserted into the guide portion 3 and for elastically pressing the filter 29 against the opposing side wall 3a with an elastic force peculiar to the material. A receiving portion 5 is provided on a part of the other side wall 3a. The receiving portion 5 is formed of a concave portion having an arc-shaped cross section. Here, it is necessary to provide the receiving portion 5 above the pressing portion 4. On the other hand, the filter 29 supported by the filter support 1 is configured as shown in FIGS.
That is, the filter 29 is configured such that its peripheral end is held by the filter case 6 formed of a frame.
One side of the filter case 6 is provided with a stopper 7 having the same radius of curvature as the receiving part 5 of the filter support part 1 and having a semicircular cross section. Further, the upper end of the filter case 6 is a tapered portion 6a formed of an obliquely formed surface. The filter case 6 contains the filter 2
Air Cleaner Filter A and Deodorant Filter B Constituting No. 9
Are arranged side by side. Further, a pre-filter C is fitted on one side surface of the filter case 6, and the air-cleaning filter A and the deodorizing filter B are covered by the pre-filter C so as not to fall off from the filter case 6. Thus, the filter 29 is an assembled assembly. In the normal posture of the indoor unit, the decorative panel 24 has a flat plate shape as shown in FIG. That is, the filter mounting portion 24b is
7 by the magnetic attraction of the magnetic member 48 to the peripheral end frame 2
4a and the center panel portion 24c in close contact with the decorative panel 2.
4 and a filter 29 attached thereto.
Correctly face the indoor heat exchanger 27. The refrigeration cycle operation and the blower 2
8 drives the air-conditioned room air into the suction port 33.
Is sucked into the unit main body 21 and is guided along the ventilation path S. When passing through the filter 29, dust contained in the air-conditioned room air is captured. The heat exchange air is guided to the indoor heat exchanger 27 to perform heat exchange, and is blown from the outlet 25 to a predetermined portion through the outlet duct 26 to achieve air conditioning of the room R to be air-conditioned. Since the filter 29 is provided substantially in parallel with the indoor heat exchanger 27, the area of the filter 29 is substantially the same as the heat exchange area of the indoor heat exchanger 27 (both areas facing the ventilation path S). Can be formed. Of course, the area of the filter 29 is
In the present invention, the filter area is increased by the difference between the area of the filter 29 and the area of the suction port 33 as compared with the conventional filter having the same area as the suction port area. The time of clogging is reliably extended by the increased area, and the life of the filter 29 can be extended. Also, in this state, the filter 29 is
As shown in (A), it is supported by the filter support 1. That is, the lower portion of the filter case 6 configured to hold the peripheral end of the filter 29 is inserted into the guide portion 3 configuring the filter support portion 1, and is elastically pressed by the pressing portion 4 against one of the side walls 3 a. You. And filter case 6
Is engaged with the receiving portion 5 provided on the guide portion 3, and is securely engaged and held by the receiving portion 5 by the elastic force of the pressing portion 4. After a predetermined period of operation, the filter 29
Of dust trapped in the filter or a new filter 29
Exchange work with. At this time, the filter raising / lowering switch of the remote controller is turned on (pressed). Then, the opening / closing drive mechanism 35 is driven, the wire 37 is pulled down, and the filter mounting portion 24b is pivoted about the pivotal support portion 36, the free end is rotated downward, and the peripheral end frame portion 24a and the center panel portion 24 are rotated.
Release c. The posture of the filter case 6 supported by the filter mounting portion 24b via the filter supporting portion 1 changes with the rotation of the filter mounting portion 24b. And the receiving portion 5 which engages with the stopper portion 7 is securely held. [0053] As shown in FIG.
When b is in a substantially vertical state, the opening / closing drive mechanism 35
Stops driving. In particular, since one end in the longitudinal direction of the filter mounting portion 24b is rotated, the distance between the lower end portion of the filter mounting portion 24b that is in the vertical state and the floor surface (not shown) is further reduced. Accordingly, the filter 29 whose posture has been changed to the vertical state together with the filter mounting portion 24b is almost at the front position of the worker, and the filter 29 can be easily used without using a stepping step or taking an unreasonable standing posture. 29 is reachable. Then, if the filter case 6 is pulled in a direction of coming out of the filter support portion 1, the elastic force of the pressing portion 4 can easily be exceeded, and the stopper portion 7 of the filter case 6 can be easily removed.
Means that the guide portion 3 is disengaged from the receiving portion 5 and can be removed. Next, the filter 29 as an assembly is disassembled. First, the pre-filter C is removed from the filter case 6, and then the air cleaning filter A and the deodorizing filter B are removed from the filter case 6. These components are cleaned, for example, to remove dust trapped on the filter surface and dust that has entered and clogged in the corners. Alternatively, the filter may be replaced with a new filter component. The operation of attaching the filter 29 without clogging to the filter supporting portion 1 is the reverse of the operation of removing the filter 29, so that the operation can be easily performed without any trouble. Then, the filter raising / lowering switch of the remote controller is turned on (pressed) again to open / close the driving mechanism 3
5 is driven. The filter mounting portion 24b rotates to close the peripheral frame portion 24a and the central panel portion 24c. In this state, as shown in FIG. 1 again, the filter 29 is arranged at a position substantially parallel to the indoor heat exchanger 27. Since the filter mounting portion 24b is opened and closed with the pair of wires 37 suspended, it is inevitable that a certain amount of elongation will occur over a long period of use. The state of this elongation is not always the same for the wires 37, and there is usually a difference. When the filter mounting portion 24b is rotated with the extended wires 37, the filter mounting portion 24b is inclined by the difference between the extensions of the wires 37. originally,
Although the difference in elongation of the wire is very small and the inclination of the filter mounting portion 24b is also very small, the upper end portion of the filter case 6 supported here, in particular, is located farthest from the filter mounting portion. Therefore, the inclination is enlarged. Therefore, when the decorative panel 24 is opened and closed by the filter mounting portion 24b, the upper end of the filter case 6 comes into contact with the unit body 1 as shown in FIG. 3B. However, the upper end of the filter case 6 is a tapered portion 6a, and the tapered portion 6a directly contacts the unit body 1 and comes into sliding contact therewith. At this time, the upper end and the lower end of the filter case 6 rotate counterclockwise around the receiving portion 5 engaged with the stopper portion 7 against the urging force of the pressing portion 4. That is, since the receiving portion 5 is provided above the pressing portion 4, the inclination of the filter 29 is allowed only by the difference between the bottom width of the guide portion 3 and the thickness of the lower end of the filter 29. Or so-called escape. Therefore, the filter case 6 is prevented from being caught, and interference by the unit body 1 is avoided. In the case where the filter 29 comes into contact with the unit main body 1 in a positional relationship opposite to that of FIG. 3B, the taper portion 6a is provided on the opposite side, and the stopper portion 7 and the receiving portion are provided. By displacing the position of 5 below the pressing portion 4, escape of the filter 29 can be obtained. Also, as shown in FIG.
It may be. In this filter supporting portion 1A, a pressing portion 4A as a pressing means is made of a leaf spring, and is separate from a guide portion 3A having a receiving portion 5. Thus, the leaf spring 4A can be replaced, and a leaf spring having an optimal elastic force can be selected. As described above, according to the present invention, the filter area can be increased without changing the basic configuration as an air conditioner, and the filter can be provided with a long life. To reduce the frequency of filter replacement work and reduce labor, and filter replacement work
This has the effect of facilitating the operation .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a longitudinal sectional view of an indoor unit of an air conditioner, showing one embodiment of the present invention. (B) is a partially cutaway plan view of the indoor unit. FIG. 2 is a perspective view of the indoor unit of the embodiment with a filter mounting portion opened. FIG. 3A is a front view of a filter and a filter supporting portion of the embodiment. (B) is a front view of the filter and the filter support part in a state different from (A). FIG. 4 is a perspective view of a filter according to the embodiment. FIG. 5 is a perspective view of the embodiment with a part of the filter cut away. FIG. 6 is a perspective view of a filter supporting portion of the embodiment. FIG. 7 is a perspective view of a filter support according to another embodiment. [Description of Signs] W: Behind the ceiling, 33: Inlet, 25: Outlet, S: Ventilation path, 27: Indoor heat exchanger, 28: Blower, 21: Unit body, 24: Decorative panel, 24b: Filter mounting Part 29 filter, 1 filter support part 3 guide part 4 press part 7 stopper part 5 receiving part 6 filter case 6a taper part A air cleaning filter B Deodorizing filter, C: Pre-filter.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-263715 (JP, A) JP-A-5-10544 (JP, A) JP-A-8-233350 (JP, A) 37313 (JP, U) Japanese Utility Model 2-30825 (JP, U) Japanese Utility Model 63-190813 (JP, U) Japanese Utility Model Utility Model 64-36022 (JP, U) Japanese Utility Model 5-40726 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 1/00 371 F24F 1/00 401 F24F 1/00 426

Claims (1)

(57) [Claims 1] It is arranged behind a ceiling, has an outlet to which an outlet duct is connected, and is disposed inside and inclined in an inverted C-shape in side view. A unit main body containing a pair of indoor heat exchangers, a blower and the like arranged opposite to each indoor heat exchanger, a decorative panel configured as a lower surface of the unit main body, and a part of the decorative panel One side in the longitudinal direction is rotatably pivotally supported, and the other side in the longitudinal direction is fitted as a free end so as to be freely openable and closable, from the position of the decorative panel forming surface until it becomes almost vertical. An indoor unit of an air conditioner comprising: a filter mounting portion rotatable between the air conditioner; the filter mounting portion is provided with a pair of suction ports along both side portions, and the suction port and the indoor heat exchange. Between the container A filter supporting portion for supporting the filter substantially in parallel with the mounting angle of the indoor heat exchanger in the formed ventilation path; the filter supporting portion is formed to have a width equal to or greater than the thickness of the filter and accommodates the filter in a removable manner. An indoor unit for an air conditioner, comprising: a guide portion that performs a pressing operation; and a pressing unit that elastically presses and holds a filter on one side surface of the guide portion.