Patent Grant
9255716
The present application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2007-192761 filed on Jul. 25, 2007, Japanese Patent Application No. 2007-192762 filed on Jul. 25, 2007, Japanese Patent Application No. 2007-203776 filed on Aug. 6, 2007, and Japanese Patent Application No. 2007-203822 filed on Aug. 6, 2007. The content of the applications is incorporated herein by reference in its entirety.
1. Field of the Invention
The present invention relates to an in-ceiling mount type air conditioner.
2. Description of the Related Art
An indoor unit of an in-ceiling mount type air conditioner has a box-shaped housing having an opening portion at the lower side thereof. The inside of the housing is compartmented into a primary space and secondary space by an indoor heat exchanger. The primary space is partitioned by a top plate portion of the housing and the indoor heat exchanger, and indoor air which has not yet been air-conditioned is taken from a room into the primary space. The secondary space is partitioned by a side plate portion of the housing, the top plate portion and the indoor heat exchanger, and air-conditioned air is fed from the primary space into the secondary space. In order to prevent occurrence of condensation due to the air-conditioned air, a secondary side heat insulating material is provided to the side plate portion and the top plate portion of the housing facing the secondary primary space so as to cover the whole surface of the side and top plate portions (for example, see JP-A-2004-84999).
On the other hand, there is little risk that condensation occurs in the primary side space as compared with the secondary side space, however, condensation may occur when the humidity of air in the space under the roof is high. Therefore, there is a case where a heat insulating material is attached to the outside surface of the housing from the outside of the housing.
When the heat insulating material is attached the outside surface of the housing from the outside of the housing, the height dimension of the indoor unit is increased.
Furthermore, the indoor unit of the in-ceiling mount type air conditioner has an elongated air blow-out port extending along each side of a face panel, and a flap is provided at the inside of the air blow-out port to adjust the air blowing direction of air after heat-exchange. This flap extends over the longitudinal direction of the air blow-out port, and it is secured so as to be rotatable around swinging shafts formed at both the ends in the longitudinal direction. A regulating member for regulating the swing range of the flap is provided at the center portion of the flap. This regulating member is brought into contact with a regulating member provided to the main body side at the start time of the operation so that the start point of the swing range of the flap is set (for example, see JP-A-2007-93041).
However, the flap is designed in an elongated shape, and also it is a resin molded article, so that it may be warped (deformed) by heat of blown-out air or the like. When the flap is warped, the position of the regulating member of the flap is displaced, and the contact position between the regulating member of the flap and the regulating member of the main body side. Therefore, there is a risk that the start point of the swing range of the flap is displaced.
Still furthermore, there is known an in-ceiling mount type air conditioner having a housing in which an air blower and a heat exchanger are accommodated, and a face panel disposed at the lower side of the housing (for example, see JP-A-2001-235174). This type air conditioner has a temporal tacking portion for temporarily tacking the face panel to the housing for safety. The face panel is temporarily tacked to the temporal tacking portion, and then the face panel is fixed to the housing by screws.
In this case, for example, insert fittings are provided to the bottom surface of a drain pan, and the temporal tacking portions are provided to the insert fittings. Therefore, there are problems that the structure is complicated, the number of parts is increased and the manufacturing cost is increased.
Still furthermore, there is known an in-ceiling mount type air conditioner in which the main body of the air conditioner are suspended from the ceiling through suspending bolts, a face panel is secured to the lower surface of the main body of the air conditioner and corner panels are freely detachably provided to the four corners of the panel body of the face panel.
In this type of air conditioner, for example when a worker operates the suspending bolts to adjust the height of the main body of the indoor unit or the like, the worker detaches a corner panel from the panel body to expose an opening formed in the panel body, and inserts his/her hand or a machine tool through this opening or the like to access and operate the suspending bolt. Here, the corner panel is required to be easily removable from the panel body at the working time as described above from the viewpoint of quickness.
In view of this, there is provided an air conditioner in which a permanent magnet is provided to a corner panel, a metal plate is provided to the face panel in connection with this permanent magnet, and the easiness of detachment of the corner panel from the face panel is enhanced by utilizing the attraction force between the permanent magnet and the metal plate (for example, see Japanese Patent No. 3284755).
However, in the above air conditioner, the manufacturing cost is increased because the permanent magnet and the metal plate are required, and also it is also required to provide a special mechanism for securing the permanent magnet and the plate to the corner panel and the face panel, so that the part structure is complicated.
Therefore, an object of the present invention is to provide an indoor unit of an in-ceiling mount type air conditioner in which a heat insulating effect can be obtained without increasing the height dimension of the indoor unit.
Furthermore, another object of the present invention is to provide an indoor unit of an in-ceiling mount type air conditioner in which the displacement of a swing range of a flap can be reduced even when the flap warps.
Still furthermore, a further object of the present invention is to provide an in-ceiling mount type air conditioner having a simple structure for temporarily tacking a face panel, so that the number of parts can be reduced and thus the manufacturing cost can be reduced.
Still furthermore, a further object of the present invention is to provide an in-ceiling mount type air conditioner in which the cost can be reduced and the part structure can be simplified with keeping the easiness of the detachment of a corner panel from a face panel.
According to a first aspect of the present invention, in order to attain the above object, an indoor unit of an in-ceiling mount type air conditioner including a box-shaped housing having a top plate portion, a side plate portion and an opening portion at the lower portion thereof, a face panel detachably mounted on the opening portion of the housing, an indoor heat exchanger through which the inside of the housing is compartmented into a primary side and a secondary side, and an air blower secured to the top plate portion of the housing that faces the primary side, further comprises: a primary side heat insulating material provided to the top plate portion so as to face the primary side of the housing; and a secondary side heat insulating material provided to the side plate portion so as to face the secondary side of the housing, wherein the primary side heat insulating material is provided with an opening portion through which the air blower is fixed to the top plate portion.
According to this construction, the primary side heat insulating material can be provided to the top plate portion facing the primary side of the housing (i.e., the inner surface of the top plate portion) so as to avoid the fixing portion of the air blower.
In the above construction, the primary side heat insulating material and the secondary side heat insulating material may be formed integrally with each other. In this construction, the heat insulating material is integrally formed, and thus the number of parts can be reduced. Furthermore, the number of fixing steps can be also reduced.
Furthermore, in the above construction, the inner surface of the primary side heat insulating material which faces the air blower may be designed to be flat. In this construction, air stream fed by the air blower is not disturbed and the air flow can be rectified.
In the above construction, the inner surface of the primary side heat insulating material may be provided with a groove portion through which wires are passed and a wire fixing clasp for fixing the wires in the groove portion and fixing the primary side heat insulating material to the top plate portion of the housing. According to this construction, the wires can be surely fixed, and also the heat insulating material can be surely fixed to the top plate portion.
According to the first aspect of the present invention, the primary side heat insulating material is provided to the top plate portion which faces the primary side of the housing, and the opening portion for fixing the air blower to the top plate portion is formed in the primary side heat insulating material. Therefore, the primary side heat insulating material can be secured to the top plate portion while avoiding the fixing portion of the air blower. Accordingly, it is unnecessary to displace the fixing position of the air blower by the amount corresponding to the thickness of the primary side heat insulating material. Therefore, it is not required to increase the height dimension of the housing. Therefore, as compared with a case where a heat insulating material is provided to the outside of the top plate portion, the heat insulation effect can be obtained without increasing the overall height of the indoor unit.
Furthermore, the primary side heat insulating material and the secondary side heat insulating material are formed integrally with each other, and thus as compared with a case where they are separately secured, the securing time can be shortened, and also the securing work can be easily performed. Furthermore, the number of parts can be reduced, and thus the number of fabrication steps can be reduced.
Still furthermore, the inner surface of the primary side heat insulating material which faces the air blower is designed to be flat, so that no turbulence occurs even when air stream fed by the air blower impinges against the inner surface of the primary side heat insulating material. In addition, air stream fed from the air blower can be rectified, so that wind noise (air flowing noise) can be reduced and thus the noise insulation effect can be achieved.
Still furthermore, the groove portion through which the wires of the air blower are passed is formed on the inner surface of the primary side heat insulating material, and the wire fixing clasp for fixing the wires in the groove portion and fixing the primary heat insulating material to the top plate portion of the housing is provided, so that the wires of the air blower can be surely fixed. In addition, the heat insulating material can be surely fixed to the top plate portion, and thus no needless gap occurs between the heat insulating material and the top plate portion.
According to a second aspect of the present invention, an indoor unit of an in-ceiling mount type air conditioner including a box-shaped housing having a top plate portion, a side plate portion and an opening portion at the lower portion thereof, a face panel detachably mounted on the opening portion of the housing, an indoor heat exchanger through which the inside of the housing is compartmented into a primary side and a secondary side, and an air blower secured to the top plate portion of the housing that faces the primary side, further comprises: an air blow-out port formed in an elongated shape along a side of the face panel; a flap that extends in a longitudinal direction of the air blow-out port and has swinging shafts at both the end portions thereof; and a fixing seat having a fixing hole to which each of the swinging shafts of the flap is swingably secured and a stepping motor for driving the swinging shaft of the flap, wherein each of the swinging shafts of the flap is provided with a projecting portion that projects outward from the outer peripheral surface of the swinging shaft, and a hole wall portion of the fixing hole of the fixing seat is provided with at least one engaging groove portion that abuts against the projecting portion to regulate a swing range of the flap.
According to the above construction, the swing range of the flap can be regulated on the basis of the position of the fixing hole.
In the above construction, the hole wall portion of the fixing hole of the fixing seat may be provided with two engaging groove portions which are bilaterally symmetrical with each other. In this construction, it is unnecessary to provide plural kinds of fixing seats in accordance with the position of the engaging groove portion.
Furthermore, the fixing hole may be designed in a cylindrical shape. In this construction, the fixing hole and the engaging groove portion can be easily formed.
According to the second aspect of the present invention, the swinging shaft of the flap is provided with the projecting portion projecting outward from the outer peripheral surface of the swinging shaft, and the hole wall portion of the fixing hole is provided with the engaging groove portion for regulating the swing range of the flap by abutting against the projecting portion. Therefore, the swing range of the flap can be regulated by the fixing hole portion in the neighborhood of the fixing portion of the stepping motor. Therefore, even when the flap is warped due to the heat of blown-out air or the like, the effect of the heat does not affect the projecting portion, so that the displacement between the projecting portion and the engaging groove portion can be suppressed. As a result, heat-exchanged air can be fed to a desired area under air-conditioning operation.
Furthermore, the engaging grooves are symmetrically formed in the hole wall portion of the fixing hole. Therefore, even when the fixing orientation of the flap to the fixing seat is reversed, the projecting portion can be made to abut against the engaging groove portion. Therefore, it is unnecessary to provide plural kinds of fixing seats, and the parts can be made common by one fixing seat.
Still furthermore, by designing the fixing hole in a cylindrical shape, the fixing hole and the engaging groove portions can be easily formed, and thus the manufacturing cost can be reduced.
According to a third aspect of the present invention, an in-ceiling mount type air conditioner including a box-shaped housing having a top plate portion, a side plate portion and an opening portion at the lower portion thereof, a face panel detachably mounted on the opening portion of the housing, an indoor heat exchanger through which the inside of the housing is compartmented into a primary side and a secondary side, an air blower secured to the top plate portion of the housing that faces the primary side, and suspending fittings which are provided to the side plate portion of the housing through which suspending bolts hung from beams of a ceiling are inserted to suspend the housing from the ceiling, is characterized in that each of the suspending fittings comprises a first portion extending in the housing, a second portion extending through an opening formed in the housing to the outside of the housing substantially in parallel to the top plate portion, and a third portion that is hooked to the lower end edge of the side plate portion of the housing to support the lower end edge of the side plate portion and provided with a temporal tacking portion for temporarily tacking the face panel to the housing.
According to the third aspect of the present invention, the temporal tacking portion for temporarily tacking the face panel is provided to the third portion constituting a part of the suspending fitting, so that the structure of temporarily tacking the face panel is simplified and it is unnecessary to separately provide the temporal tacking portion. Therefore, the number of parts can be reduced, and further the manufacturing cost can be reduced.
In the above construction, the third portion may be provided with an actually fixing portion for actually fixing the temporarily tacked face panel to the housing. According to this construction, the actually fixing portion and the temporal tacking portion are provided to the third portion of the suspending fitting, and thus the structure of fixing the face panel can be simplified. Furthermore, both the actually fixing portion and the temporal tacking portion are provided to the third portion of the suspending fitting. Therefore, after the face panel is temporarily tacked, the face panel can be directly actually fixed to the housing without changing the position of a stepladder on which the worker rides, for example, so that the workability can be enhanced.
Furthermore, the temporal tacking portion may be formed by bending the tip portion of the third portion upwardly. According to this construction, the temporal tacking portion can be simply formed, and the structure of temporarily tacking the face panel can be simplified.
In the above construction, the face panel may be provided with opening portions at four corners thereof that correspond to the suspending fittings, the opening portions of the face panel being covered by corner panels, and each of a pair of diagonally-located opening portions out of the opening portions of the face panel may be provided with a hook member which is hooked to the temporal tacking portion. According to this construction, by detaching the corner panel, the hook member can be easily accessed, and thus the hook member and the temporal tacking portion can be easily hooked/unhooked. Furthermore, the hook member is provided at each of the diagonally-located opening portions of the face panel, and thus in the case of a mini-cassette type indoor unit having a small outer-shape width, a worker can be easily attach/detach the face panel alone.
According to the third aspect of the present invention, the third portion constituting a part of the suspending fitting is provided with the temporal tacking portion for temporarily tacking the face panel, so that the structure of temporarily tacking the face panel is simplified and thus it is unnecessary to separately provide the temporal tacking portion. Accordingly, the number of parts can be reduced, and the manufacturing cost can be reduced.
According to a fourth aspect of the present invention, an in-ceiling mount type air conditioner including a box-shaped housing having a top plate portion, a side plate portion and an opening portion at the lower portion thereof, a face panel detachably mounted on the opening portion of the housing, an indoor heat exchanger through which the inside of the housing is compartmented into a primary side and a secondary side, an air blower secured to the top plate portion of the housing that faces the primary side and a corner panel which is detachably mounted at each of four corners of a panel body of the face panel, is characterized in that the corner panel is provided with an engaging pawl to be engageable with an engaging hole formed at each of the four corners of the panel body of the face panel, and a joint leg that is formed at one corner portion of the corner panel so as to extend to a seat portion provided to a corner inner wall portion of the panel body and be fixed to the seat portion when the corner panel is mounted on the panel body of the face panel.
In the above construction, the joint leg may be formed of elastic material, and provided with a projecting portion to be engageable with an engaging hole formed in the corner inner wall portion.
In the above construction, a tab portion may be formed at the tip of the joint leg so as to extend over the seat portion when the corner panel is mounted on the panel body of the face panel.
According to the fourth aspect of the present invention, the corner panel is pressed to the ceiling-side direction at the position of the panel body where the corner panel should be secured, the engaging pawl of the corner panel is engaged with the engaging hole formed in the panel body, and the projecting portion of the joint leg of the corner panel is fitted in the engaging hole of the corner inner wall portion of the panel body, whereby the corner panel can be easily secured to the panel body. Furthermore, by elastically deforming the joint leg to release the engagement between the projecting portion and the engaging hole, the corner panel can be easily detached from the panel body. Therefore, the easiness of the attachment/detachment can be secured without using any special member such as permanent magnet, a plate or the like, the cost can be reduced and the member structure can be simplified.
Preferred embodiments according to the present invention will be described hereunder with reference to the accompanying drawings.
A first embodiment according to the present invention will be described hereunder with reference to the accompanying drawings.
As shown in
The indoor unit main body 20 has a housing 21 constituting the outer shape portion of the indoor unit main body 20. The housing 21 is designed in a box-shape, and it comprises a lower opening portion 21a whose lower side surface is fully opened, and a top plate portion 21b and a side plate portion 21c. The top plate portion 21b and the side plate portion 21c are fabricated by sheet metal processing. The lower opening portion 21a is closed by the face panel 100 described above.
Suspending fittings 28 for suspending the indoor unit main body 20 are provided at four corner portions on the outer surfaces of the side plate portions 21c of the housing 21 as shown in
The face panel 100 has a suction port 110 for taking indoor air into the center portion of the face panel 100, four air blow-out ports 120 which are formed in an elongated shape along the sides of the face panel 100 around the air suction port 110 and blow out heat-exchanged air, and corner panels 102 constituting the four corner portions of the face panel 100. A flap 122 for adjusting the air blow-out direction is provided to each of the air blow-out ports 120. The corner panels 102 are constructed so as to be detachable to the lower side of the face panel 100, and has such a size that the hand of a fixing worker can reach the engagement position between the suspending fitting 28 and the suspending bolt 129 when the corner panel 102 is detached.
A heat insulating material 22 formed of foam polystyrene material (described in detail later) is installed on the whole inner surface of the top plate portion 21b and the side plate portion 21c of the housing 21, and the indoor unit main body 20 has such a heat insulating structure that heat transfer is little between the inside of the housing and the outside of the housing.
An indoor heat exchanger 24 which is formed in a substantially rectangular frame shape in plan view is mounted in the housing 21. The upper end portion of the indoor heat exchanger 24 is secured so that no gap occurs between the upper end portion and the heat insulating material 22 as shown in
The primary space S1 is partitioned by the top plate portion 21b of the housing 21 and the indoor heat exchanger 24, and an air blower 23 is provided in this space. The air blower 23 comprises a fan motor 23a fixed to the top plate portion 21b of the housing 21 by proper means, and a fan 23b fixed to the swinging shaft of the fan motor. Accordingly, in connection with the rotation of the fan 23b, air is sucked toward the swinging shaft (in the T1 direction in
Furthermore, a bell mouth 26 which is formed so as to be tapered to the air blower 23 is provided between the air suction port 110 of the face panel 100 and the air blower 23. An electrical part box 27 is provided to a part of the outer peripheral surface side of the bell mouth 26. A control circuit for controlling electrical parts such as the air blower 23, etc. is accommodated in the electrical part box 27.
The secondary space S2 is partitioned by the side plate portion 21c and the top plate portion 21b of the housing 21 and the indoor heat exchanger 24, and air blown from the primary space S1 is heat-exchanged by the indoor heat exchanger 24 and then fed into this secondary space S2.
As shown in
A groove portion 31 is formed on the inner surface Q of the primary heat insulating material 22a so as to surround the periphery of the fan motor 23a as shown in
As shown in
As shown in
The diameter of the lower portion 42b is set to be substantially equal to the diameter of the opening portion 32 of the primary heat insulating material 22a, and the thus the lower portion 42b is fitted in the opening portion 32 with no gap. By fastening the fan motor 32a and the top plate portion 21b through bolts 44, the fan motor 23a is fixed to the top plate portion 21b. The rubber cushion 41 is provided to absorb vibration of the fan motor 23a when the fan motor 23a rotates.
As shown in
The inner surface Q of the primary heat insulating material 22a is formed by a flat surface having no step. Under the state that the wire fixing clasp 52 is fixed, the surface of the wire fixing clasp 52 and the inner surface Q are set on substantially the same plane.
That is, the inner surface Q is disposed so as to face the air blower 23, and air blown from the air blower 23 impinges against the inner surface Q. Therefore, it is prevented that air impinges against a step or an uneven portion and thus turbulence flow of air occurs. Furthermore, air impinges against the inner surface Q, and thus the flat surface serves to positively rectify air flow.
Accordingly to the indoor unit 10 of the in-ceiling mount type air conditioner according to this embodiment, the primary heat insulating material 22a is provided to the top plate portion 21b facing the primary space S1 of the housing 21, and thus heat insulation is performed between the air under the roof and the indoor air sucked into the primary space S1. Accordingly, occurrence of condensation in the housing 21 can be prevented.
The opening portion 32 for fixing the air blower 23 to the top plate portion 21b is formed in the heat insulating material 22a, and thus the primary heat insulating material 22a can be secured to the top plate portion with avoiding the rubber cushion 41 secured to the fixing portion 40 of the air blower 23. Therefore, the fixing position of the air blower 23 is not required to be displaced in the height direction by the amount corresponding to the provision of the primary heat insulating material 22a, so that it is not required to increase the height dimension of the housing 21. Therefore, as compared with the case where the heat insulating materials is provided at the outside of the top plate portion 21b, the heat insulation effect can be obtained without increasing the height of the indoor unit main body 20.
The primary heat insulating material 22a and the secondary heat insulating material 22b are formed integrally with each other, and as compared with the case where the primary heat insulating material 22a and the secondary heat insulating material 22b which are separately formed are fixed separately from each other, the fixing time can be shortened. In addition, the fixing work can be easily performed. Furthermore, the number of parts can be reduced, and thus the number of fabrication steps can be reduced.
Furthermore, the inner surface Q of the primary heat insulating material 22a which faces the air blower 23 is formed in a flat shape, so that air blown from the air blower 23 impinges against the inner surface Q of the primary heat insulating material 22a and thus no turbulence flow of air occurs. Furthermore, air blown from the air blower 23 can be rectified, so that air sound can be reduced and a noise insulating effect can be obtained.
The groove portion 51 through which the wires 50 of the air blower 23 are passed is formed on the inner surface of the primary heat insulating material 22a, and the wires 50 are fixed in the groove portion 51. In addition, the wire fixing clasp 52 for fixing the primary heat insulating material 22a to the top plate portion 21b of the housing 21 is provided, whereby the wires 50 of the air blower 23 can be surely fixed. Furthermore, the primary heat insulating material 22a can be surely fixed to the top plate portion 21b, and thus no needless gap occurs between the primary heat insulating material 22a and the top plate portion 21b.
The present invention is not limited to the above embodiments, and various kinds of modifications and alterations can be performed on the basis of the technical idea of the present invention.
In the indoor unit 10 of this embodiment, with respect to the heat insulating material 22, the primary heat insulating material 22a and the secondary heat insulating material 22b are formed integrally with each other. However, they may be formed separately from each other. That is, the heat insulating material may be formed by properly selecting one of the integration type and the separation type in consideration of the size of the metal mold of the heat insulating material, the cost of the metal mold, etc. although the size of the heat insulating material 22 is varied in accordance with the size of the indoor unit 10 (for example, a mini cassette type which is miniaturized in the outer dimension of 600 mm×600 mm).
The flap 122 extends substantially over the entire length in the longitudinal direction of the air blow-out port 120 as shown in
As shown in
Furthermore, the stepping motor 34 is fixed to the L-shaped inner portion of the fixing seat 30. The stepping motor 34 is connected to the electrical part box 27 by a wiring material (not shown), and the rotational angle thereof is controlled by the controller in the electrical part box 27.
The cylindrical support portion 32 has a hole wall portion 32a continuous in the peripheral direction, and a hollow portion 32b surrounded by the hole wall portion 32a. At least one engaging groove portion is formed in the hole wall portion 32a. In this embodiment, two engaging groove portions 35a, 35b which are bilaterally symmetrical with each other when the fixing seat 30 is viewed from the front side (viewed in the direction A of
As shown in
The flap 12 is integrally molded with resin material, and it comprises a wind direction plate 40 which extends in the longitudinal direction and increases in width at the center portion thereof, and two swinging shafts 41 which project outward from the end portions in the longitudinal direction of the wind direction plate 40 as shown in
When the swinging shaft 41 is inserted into the hollow portion 32b of the cylindrical support portion 32 shown in
The fixing of the fixing seat 30 will be described with reference to
In the case of one fixing seat 30 of the two fixing seat 30, the driving shaft 34a of the stepping motor 34 (see
With respect to the paper surface of
In the case of the other fixing seat 30 of the two fixing seats, the driving shaft 34a of the stepping motor 34 (see
With respect to the paper surface of
When the swinging shaft 41 is inserted into the cylindrical support portion 32 of the fixing seat 30, the projecting portion 42 on the swinging shaft 41 of the above flap 122L enters the engaging groove portion 35a at the left side when viewed in the A direction of
The fixing hole 33 of the fixing seat 30 is disposed to be exposed to the room when the corner panel 102 (see
Next, the operation of this embodiment will be described.
When the operation of the indoor unit 10 is started, the four flaps 122 located at the air blow-out port 120 are driven by the stepping motors 34 secured to the two fixing seats 30, thereby starting the swinging operation of the flaps 122. At this time, the projecting portion 42 on the swinging shaft 41 of the flap 122 abuts against the end portion of the engaging groove portion 35a or 35b, whereby the start point of the swing range of the flap 122 is determined. Thereafter, the stepping motor 34 rotates by a predetermined angle in response to a signal from the control circuit, and the swinging range of the flap is determined on the basis of the signal from the control circuit.
According to the indoor unit 10 of the in-ceiling mount type air conditioner according to this embodiment, the swinging shaft 41 of the flap 122 is provided with the projecting portion 42 projecting outward from the outer peripheral surface of the swinging shaft 41, and the engaging grooves 35a, 35b which abut against the projecting portion 42 to regulate the start point of the swing range of the flap 122 are provided to the hole wall portion 32a. Therefore, the start point of the swing range of the flap 122 can be regulated by the cylindrical member 32 located in the neighborhood of the fixing portion of the stepping motor 34. Therefore, even when the wind direction plate 40 of the flap 122 is warped due to heat of blown-out air or the like, the projecting portion 42 is not affected by the warp of the wind direction plate 40, and thus the displacement between the projecting portion 42 and the engaging groove portions 35a, 35b can be prevented. As a result, heat-exchanged air can be fed to a predetermined area under air-conditioning operation.
Since the engaging groove portions 35a, 35b are symmetrically formed in the hole wall portion 32a, the projecting portion 42 can be made to abut against the engaging groove portion 35a, 35b even when the fixing direction of the flap 122 to the fixing seat 30 is reversed. Therefore, it is unnecessary to provided plural kinds of fixing seats 30, and thus the parts can be made common by using one fixing seat 30.
Furthermore, the hole portion in which the swinging shaft 41 is inserted is constructed by the cylindrical member 32, whereby the hollow portion 32b and the engaging groove portions 35a, 35b can be easily formed, and the cost can be reduced.
When the corner panel 102 is detached, the fixing hole 33 of the fixing seat 30 is disposed to be exposed to the room. Therefore, by detaching the corner panel 102, the fixing seat 30 can be easily exchanged, so that the maintenance can be enhanced.
The prevent invention is not limited to the above embodiment, and various modifications and alterations may be made on the basis of the technical idea of the present invention.
In the above embodiment, the cylindrical member 32 is provided to the fixing seat 30, and the swinging shaft 41 is inserted in the cylindrical member 32. However, another structure may be adopted. For example, a hole portion which is the same as the arcuate portion 41b of the swinging shaft 41, and a groove portion for regulating the movable range of the projecting portion 42 may be provided to the hole portion.
As described above, the suspending fittings 28 are respectively fixed to the four corners of the housing 21, and the suspending bolts 129 penetrate through the suspending fittings 28, whereby the housing 21 is suspended from the ceiling by the suspending bolts 129. As shown in
More specifically, the suspending fitting 28 is designed in a substantially U-shaped fitting in which the second portion 32 and the third portion extend from the upper and lower ends of the first portion 31 in parallel to each other. The first portion 31, the second portion 32 and the third portion 33 are integrally formed by subjecting one plate material to press working, for example. Therefore, the suspending fittings 28 can be easily formed, and the manufacturing cost can be reduced.
As shown in
The suspending fitting 28 suspends the main body of the indoor unit 20 from the beam through the suspending bolt 129, and when the height of the indoor unit main body 20 is changed, the suspending bolt 129 is adjusted. The corner panels 102 are provided at the positions (four corners) corresponding to the suspending fittings 28. Accordingly, when the corner panel 102 is detached, the suspending fittings 28 are exposed, and thus the suspending bolts 129 can be easily accessed. Accordingly, there is a merit that the suspending fittings 28 can be easily accessed from the outside by merely detaching the corner panels 102.
In this embodiment, the suspending fitting 28 has a temporal tacking portion 34 for temporarily tacking the face panel 100 (
Furthermore, the suspending fitting 28 has a screw hole 33a formed in the third portion 33 as shown in
As described above, by providing the temporal tacking portion 34 to the third portion 33 of the suspending fitting 28, the temporal tacking portion 34 can be easily accessed under the state that the corner panel 102 is detached, and thus the face panel 100 can be temporarily tacked to the temporal tacking portion 34. Furthermore, it is unnecessary to provide the temporal tacking portion separately from the suspending fitting, so that the number of parts can be reduced and further the manufacturing cost can be reduced. Still furthermore, the screw hole 33a is formed in the third portion 33 of the suspending fitting 28. Accordingly, after the face panel 100 is temporarily tacked, a worker can actually fix the face panel 100 to the housing 21 without changing the position of a stepladder on which he rides, so that the workability can be enhanced.
The corner portion of the face panel 100 has a recess portion 41 which is more recessed as compared with the surface of the face panel 100, and an opening portion 42 formed by the recess portion 41 and the edge portion 100A of the face panel 100 as shown in
In this construction, the recess portion 41 has a seat 43 obtained by projecting a part of the recess portion 41 to the opening portion 42 side, and the seat 43 has a through hole 44 for fixing the face panel 100 to the housing 21.
A hook member 151 which is hooked to the temporal tacking portion 34 is provided to the edge portion of the seat 43. The hook member 151 is formed by bending a metal plate such as a leaf spring material or the like, and it has a base portion 52 fixed to the seat 43, an elastic portion 53 which continuing to the base portion 52 and extends upwardly (downwardly in
Furthermore, the hook member 151 is provided to the edge portion of each of a pair of diagonally-located opening portions 42 out of the opening portions 42 of the face panel 100 (not shown). Accordingly, in the case of a mini-cassette type indoor unit 10 having a small outside width, the worker can attach and detach the face panel 100 alone by operating each of the hook members 51 provided at the diagonal positions of the face panel 100 with one hand.
Next, the procedure of fixing the face panel 100 to the housing will be described with reference to
First, each of the opening portions 42 located at the diagonal positions is gripped by hand and the upper end (that is, the hook portion 54) of the hook member 151 provided to the opening portion 42 is spread outward (in the direction of an arrow X in
Subsequently, the screw 60 is inserted into the through hole 44 (
As described above, according to this embodiment, in the in-ceiling mount type air conditioner which has the housing 2 for accommodating the air blower 23 and the indoor heat exchanger 24 therein, the face panel 100 disposed at the lower side of the housing 21, and the suspending fittings 28 provided to the side plate portion 21C of the housing 21 and in which the housing 21 is suspended from the beam and supported by inserting the suspending bolts hung from the beam through the suspending fittings 28, each of the suspending fittings 28 comprises the first portion 31 extending in the housing 21, the second portion 32 which extends to the outside of the housing 21 through the opening formed in the housing 21 so as to be substantially parallel to the top plate portion 21b, and the third portion 33 which is hooked to the lower end edge 21d of the side plate portion 21c of the housing 21 to support the lower end edge 21d of the side plate. The third portion 33 is provided with the temporal tacking portion 34 for temporarily tacking the face panel 100. Therefore, by using a part of the suspending fitting 28, the face panel 100 can be temporarily tacked to the suspending fitting 28, and the construction for temporarily tacking the face panel 100 is simplified. Furthermore, it is unnecessary to provide the temporal tacking portion 34 separately. Accordingly, the number of parts can be reduced, and further the manufacturing cost can be reduced.
According to this embodiment, the third portion 33 has the screw hole 33a through which the temporarily tacked face panel 100 is actually fixed to the housing 21, and thus the temporal tacking and the actual fixing of the face panel 100 to the housing 21 can be performed by using the third portion 33 of the suspending fittings 28, and the construction of fixing the face panel 100 can be simplified. Furthermore, the screw hole 33a and the temporal tacking portion 34 are provided to the third portion 33 of the suspending fitting 28. Therefore, after the face panel 100 is temporarily tacked, the face panel 100 can be actually fixed to the housing 21 without changing the position of the stepladder on which the worker rides, and thus the workability can be enhanced.
Furthermore, according to this embodiment, the temporal tacking portion 34 is formed by bending the tip portion of the third portion 33, so that the temporal tacking portion 34 can be easily formed, and the structure of temporarily tacking the face panel 100 can be simplified.
Still furthermore, according to this embodiment, the face panel 100 has the opening portions 42 covered by the corner panels 102 at the four corners of the face panel 100 in connection with the suspending fittings, a pair of opening portions 42 out of the four opening portions 42, which are located at the diagonal positions of the face panel 100, are provided with the hook members 151 which are hooked to the temporal tacking portions 34, and thus the hook members 51 can be easily accessed by detaching the corner panels 102. Accordingly, the hook members 51 and the temporal tacking portions 34 can be easily hooked/unhooked to/from each other. Furthermore, the hook members 51 are provided to the opening portions 42 located at the diagonal positions. Therefore, in the case of a so-called mini-cassette type indoor unit 10 having a small outside width, a worker can easily attach/detach the face panel alone by operating each of the hook members 51 provided at the diagonal positions of the face panel with one hand.
The present invention is not limited to the above embodiment, and various modifications and alterations may be made on the basis of the technique idea of the present invention. In the above embodiment, the temporal tacking portion 34 is formed integrally with the third portion by bending the tip portion of the third portion, however, the present invention is not limited to this style. For example, the temporal tacking portion may be provided separately from the third portion and fixed to the third portion by fastening means such as welding, screw-cramping or the like.
This grid system ceiling has plural holding bars 103 which are suspended from the ceiling through plural suspending members (not shown). These holding bars 103 are set up in a grid pattern, and a holding bar opening portion 104 is formed in each space surrounded by the grid bars 103. In this embodiment, each of the holding bar opening portions 104 has an opening of 600 mm×600 mm in size. A ceiling material 105 which corresponds to the size of the opening and forms a ceiling surface, an illumination unit 6 for illuminating a room, the air conditioner 2 for air-conditioning the room, etc. are secured to the respective holding bar opening portions 4.
The air conditioner 102 according to this embodiment is a four-way cassette type air conditioner 102 having an outer shape of 600 mm×600 mm which correspond sot the holding bar opening portion 104, and it has an air conditioner maim body 111 suspended from the ceiling through suspending bolts 110 and a face panel 112 secured to the lower surface of the air conditioner main body 11 as shown in
As shown in
As shown in
The face panel 112 has a face panel body 120 which is designed to be substantially rectangular in plan view as shown in
Furthermore, at the four corners of the face panel body 120, face panel side openings 125 are formed below the suspending fittings 114 as shown in
First, the corner portion 120A of the face panel body 120 to which the corner panel 130 is secured will be described.
As shown in
On the inner peripheral edge of the opening portion 131, side engaging holes 35 are formed at the inner peripheral edges of the two side corner portions 134 adjacent to the outer corner portion 132 out of the four corner portions of the opening portion 131 as shown in
Furthermore, a corner inner wall portion 140 is formed at the center corner portion 136 formed in the center direction out of the four corner portions of the opening portion 131.
As shown in
The partition plate 186 is a plate-shaped member through which the opening portion 131 and the air suction port 121 are partitioned from each other, and it extends to the room while inclined from the face panel body 120 outward. An inner wall surface side engaging hole 141 is formed in the partition plate 86 by cutting out the partition plate 186 as shown in
The seat portion 142 is provided to the air suction port 21 side of the base end portion of the corner inner wall portion 140. The seat portion 142 is a site against which a tab portion 158 (
This seat projecting portion 145 is formed so as to project to the air suction port 121 side. Accordingly, when the air suction grille 123 is fixed to the air suction port 121, the seat projecting portion 145 and the fixing screw 143 threadably mounted on the female screw portion 144 of the seat projecting portion 145 are not viewed from the room, so that the exterior appearance is enhanced.
As shown in
Furthermore, in the corner panel outer peripheral wall 150, side engaging pawls 154 to be fitted in the side engaging holes 135 (
The joint leg 156 is formed of material having elasticity, and it has an erecting portion 157 projecting to the ceiling side, and a tab portion 158 which is formed so as to be clinched from the tip of the erecting portion 157 to the center side as shown in
The erecting portion 157 is provided with a projecting portion 159 projecting outward as shown in
Furthermore, the tab portion 158 is brought into contact with the seat portion 142 described above and fixed to the seat portion 142, and a through hole 161 is formed in the tab portion 158 so as to penetrate in the ceiling-room direction. This through hole 161 is a hole through which the fixing screw 143 penetrates. When the corner panel 130 and the face panel body 120 are fixed to each other, as shown in
In the tab portion 158, the length L1 (see
The procedure of fixing the corner panel 130 to the face panel body 120 is as follows.
That is, the corner panel 130 is temporarily tacked to the opening portion 131 of the face panel body 120 through no fixing screw 143 under the state that the suction grille 123 is detached from the face panel body 120, and then the corner panel 130 and the face panel body 120 are actually fixed to each other by the fixing screw 143. Thereafter, the suction grille 123 is secured to the face panel body 120.
Specifically, as shown in
When the corner panel 130 is pressed in to the ceiling side, the side engaging pawls 154 of the corner panel 130 enter the inner periphery of the opening portion 131 and then elastically fitted to the side engaging holes 135. At the same time, the erecting portion 157 of the joint leg 156 of the corner panel 130 and the projecting portion 159 are guided by the slope of the corner inner wall portion 140 and enters the air suction port 121 side of the corner inner wall portion 140. At this time, the projecting portion 159 is guided by the slant portion 60 of the projecting portion 159 so that the projecting portion 159 slides to the ceiling side while coming into contact with the corner inner wall portion 140. In connection with this, the erecting portion 157 is elastically deformed in accordance with the inclination of the slant portion 160 of the projecting portion 159. When the corner panel 130 is further pressed, the projecting portion 159 is guided by the slant portion 160, and enters the inner wall surface side engaging hole 141 of the corner inner wall portion 140, so that the projecting portion 159 is elastically fitted in the inner wall surface side engaging hole 141 and the temporal tacking is finished.
After the temporal tacking, the fixing screw 143 is threadably mounted on the female screw portion 144 formed in the seat projecting portion 145 of the seat portion 142 through the through hole 161 formed in the tab portion 158 of the joint leg 156, thereby performing the actual fixing. After the actual fixing, the suction grille 123 is secured to the air suction port 121. At this time, the seat projecting portion 145 is formed to project to the air suction port 121 as described above, and thus the fixing screw 143 is not exposed after the suction grille 123 is secured as shown in
As described above, according to this embodiment, the temporal tacking of the corner panel 130 can be performed by an easy and simple work of hooking the outside engaging pawl 52 of the corner panel 130 to the outside engaging hole 133 of the face panel body 120 and then pressing the corner panel 130 to the ceil side. Therefore, the work can be made easy and quick. Furthermore, at the temporal tacking time, the corner panel 130 is fitted in the opening portion 131 are fitted at the four corner portions of the corner panel 130, and thus the temporal tacking state of the corner panel 130 can be firmly held. Therefore, the corner panel 130 can be prevented from dropping after the temporal tacking, and thus the safety can be enhanced.
Next, the procedure of detaching the corner panel 130 from the face panel body 120 will be described.
When the corner panel 130 is detached, as shown in
After the fixing screw 143 is unscrewed, the tab portion 158 of the joint leg 156 is pinched, the tab portion 158 is displaced to the center side (in the direction indicated by an arrow Y1 in
As described above, according to this embodiment, the corner panel 130 can be detached from the face panel body 120 by the simple work of pinching the tab portion 158 of the joint leg 156 of the corner panel 130 and elastically deforming the tab portion 158 to displace the corner panel 130 to the room side, and the work can be made easy and quick. Furthermore, in the detaching work, even when the fixing screw 143 is pulled out, the corner panel 130 is prevented from dropping, and thus the safety can be enhanced.
Furthermore, according to this embodiment, the corner panel 130 is detached from the face panel body 120 by pulling out the corner panel 130 in the room-side direction. Here, for example, in the case of a mechanism of detaching the corner panel 130 by sliding the corner panel 130 in the outward direction, the air conditioner 102 and the illumination unit 106 are adjacent to each other ad shown in
As described above, according to this embodiment, when the corner panel 130 is secured to the face panel body 120, it can be performed by the easy and simple work of engaging the outside engaging pawl 52 of the corner panel 130 with the outside engaging hole 133 of the face panel body 120 and then pressing the corner panel 130 in the ceiling-side direction. Furthermore, when the corner panel 130 is detached from the face panel body 120, it can be performed by the simple work of pinching the tab portion 158 of the joint leg 156 of the corner panel 130, displacing the tab portion 158 in the center-side direction to elastically deform the erecting portion 157 of the joint leg 156, pulling out the projecting portion 159 of the erecting portion 157 from the inner wall surface side engaging hole 141 to release the engagement therebetween, and then displacing the corner panel 130 in the room-side direction through the tab portion 158. As described above, according to this embodiment, the cost can be reduced and the part structure can be simplified without using any special member such as a permanent magnet, a plate, etc. while keeping the easiness of the attachment/detachment of the corner panel 130.
Furthermore, according to this embodiment, the tab portion 158 extending over the seat portion 142 is formed at the tip of the joint leg 156, and thus the tab portion 158 can be easily and surely pinched, so that the work can be made easy and efficient.
Any modification and application may be made in the above embodiment within the range of the present invention. For example, the air conditioner 102 is provided on the grid system ceiling, however, the present invention may be applied to an embedding type air conditioner in which an air conditioner is embedded in an opening provided to the ceiling. The air conditioner 102 of this embodiment is a four-way cassette type air conditioner 102 of 600 mm×600 mm in outer shape, however, the present invention is not limited to this type of air conditioner. For example, the present invention may be applied to an air conditioner of 640 mm×640 mm in outer shape or a two-way type air conditioner.
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