JP5317613B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner provided with a filter that collects dust of suction air.

2. Description of the Related Art Conventionally, ceiling-embedded air conditioners have been proposed in which removal means for removing dust from the filter is provided in order to facilitate maintenance of the filter that collects dust from the intake air. The removing means includes a rotating brush for removing dust attached to the filter, a dust box for collecting the dust removed by the rotating brush, a guide rail and a drive motor for moving the dust box and the rotating brush along the filter, It is the structure which provided on the suction grill which can be raised / lowered (for example, refer patent document 1).
JP 2007-40689 A

However, in the conventional configuration, every time a predetermined amount of dust accumulates in the dust box, the suction grill must be lowered to discard the dust accumulated in the dust box, which is troublesome.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art and to provide a ceiling-embedded air conditioner that does not require disposal work of dust removed from a filter.

In order to solve the above problems, a ceiling-embedded air conditioner according to the present invention has a blower, a heat exchanger, and a drain pan, and the ceiling-embedded air conditioner in which a suction portion of the blower faces a suction port provided in the drain pan. In the machine, a filter that collects dust of suction air is disposed at the suction port of the drain pan, the filter is supported by the drain pan, and the drain pan includes an upper drain pan that covers a lower surface of the heat exchanger, The drain pan is formed with a water reservoir portion communicating with the upper drain pan inside the one end side of the filter, and the water reservoir portion is on the suction port side of the drain pan and above the water reservoir portion. provided with a wall for accommodating the end, the to removal means overlooked dust adhering to the filter in the water reservoir comprises above the water reservoir, the dust dropped in the water reservoir The accumulated drain in part drain pan, characterized in that to enable the discharge.
According to the above configuration, since the dust removed from the filter is discharged to the outside by the drain, it is not necessary to dispose of the dust and the labor for maintenance can be reduced.
Moreover, according to the said structure, it becomes unnecessary to provide a water reservoir part as another member, while being able to simplify a structure, a drain can be easily poured into a water reservoir part.
Moreover, according to the said structure, it becomes unnecessary to provide the member which supports a filter separately, and can simplify a structure. Further, the water reservoir and the removing means are disposed in the vicinity of the filter, and the configuration is simplified and reduced in size.

In the ceiling-embedded air conditioner, the present invention further includes a filter chamber on a suction port side of the drain pan, the filter is supported in the filter chamber, and the water connected to the drain pan on one end side of the filter. A reservoir is provided, and the water reservoir is provided with a removing means for dropping the dust of the filter into the water reservoir.
According to the said structure, it becomes unnecessary to provide the member which supports a filter separately, and a structure can be simplified. Further, the water reservoir and the removing means are disposed in the vicinity of the filter, and the configuration is simplified and reduced in size.

In the ceiling-embedded air conditioner according to the present invention, the filter is a roll filter, disposed at the suction port of the drain pan, and wound with a band-shaped filter material having a width larger than the diameter of the circular suction port of the drain pan. It is characterized by being formed.
According to the said structure, the whole surface of a circular suction inlet will be covered with a roll filter, and dust of suction air can be effectively collected with a roll filter.

In the ceiling-embedded air conditioner, the present invention further includes a humidifying unit that humidifies the air heat-exchanged by the heat exchanger, and the drain of the humidifying unit flows in the order of the drain pan and the water reservoir, The dust dropped on the water reservoir can be discharged by the drain.
According to the above configuration, during the humidifying operation, dust removed from the filter is discharged to the outside by the drain of the humidifying means. Therefore, by performing the humidifying operation during the heating operation, during the heating operation in which no drain is generated in the heat exchanger. Even if it exists, the disposal work of dust is not required and the labor concerning maintenance can be reduced.

  According to the present invention, the filter for collecting the dust of the intake air is disposed on the air upstream side of the heat exchanger, the dust adhering to the filter is dropped into the water reservoir, and the dust dropped on the water reservoir is drain pan. Since the dust removed from the filter can be discharged by the drain, the dust removed from the filter is discharged to the outside by the drain, so that it is not necessary to dispose of the dust and the labor for maintenance can be reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a state where a suction grill is removed from a ceiling-embedded air conditioner according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the ceiling-embedded air conditioner. .
The ceiling-embedded air conditioner 100 includes a sheet metal main unit 1 formed in a box shape, and the main unit 1, the filter chamber 20, and the decorative panel 21 are stacked in three stages. ing.
A plurality of suspension fittings 1B are provided on the outer surface of the main unit 1, and a suspension bolt 2 fixed to the ceiling surface 110 is secured to each suspension fitting 1B by a nut 4, and these suspensions are suspended. The ceiling-embedded air conditioner 100 is suspended from the ceiling surface 110 via the bolt 2. In this case, the decorative panel 21 of the ceiling-embedded air conditioner 100 is disposed on the ceiling plate 112 provided below the ceiling surface 110 via the ceiling back space 111 and is exposed to the conditioned room.

As shown in FIG. 2, inside the main body unit 1, the side plate 1 </ b> A and the heat insulating material 3 made of polystyrene foam are arranged on the entire inner surface of the top surface, and inside the heat insulating material 3, the blower 9, and A heat exchanger 11 is accommodated.
The blower 9 includes a fan motor 5 that has a shaft disposed downward and a turbo fan 7 that is attached to the shaft of the fan motor 5. The heat exchanger 11 is a plate fin type heat exchanger formed in a pentagonal shape in a top view, and is disposed so as to surround the blower 9.

Below the heat exchanger 11, an upper drain pan 13A made of a synthetic resin such as a polystyrene foam resin is disposed so as to cover the lower surface 11A of the heat exchanger 11.
The upper drain pan 13 </ b> A is disposed so as to contact the inner surface of the side plate 1 </ b> A of the main unit 1. A substantially circular suction opening (suction port) 14 is opened at the center of the upper drain pan 13A, and the suction portion of the blower 9 faces the suction port 14. Further, a blow-off opening 15 is formed in the peripheral portion of the upper drain pan 13A to allow the exhaust of the blower 9 that has passed through the heat exchanger 11 to pass through. The upper drain pan 13A is formed with a drain passage 16A for flowing the drain downward. A nozzle 17 that guides the air in the conditioned room that has passed through the suction opening 14 to the blower 9 is attached to the upper part of the suction opening 14.

  As shown in FIG. 1, a knockout hole portion 1 </ b> C is formed on the side plate 1 </ b> A of the main unit 1. The knockout hole portion 1C is a substantially rectangular hole that is closed by a plate constituting a part of the side plate 1A. If necessary, a plate that closes the knockout hole portion 1C is pushed in, so that the plate that closes the knockout hole portion 1C is dropped, and an opening 1D for connecting the humidifier (humidifying means) 40 (see FIG. 2) is formed. . In this embodiment, among the four side plates 1A, the knockout hole portion 1C of the back side plate 1A in FIG. 1 is opened, and the humidifier 40 is attached to the opening portion 1D.

As shown in FIG. 2, the humidifier 40 includes a base plate 41 that closes the opening 1 </ b> D of the side plate 1 </ b> A of the main unit 1, and a humidifying element 42 is disposed outside the base plate 41. The water supply unit 43 is arranged in the front. In this configuration, the opening 1D is closed by inserting the humidifying element 42 into the opening 1D from the outside of the main unit 1 and fixing the base plate 41 and the side plate 1A to the main unit 1.
In a state where the humidifier 40 is inserted into the opening 1D and fixed, the humidifying element 42 is positioned adjacent to the heat exchanger 11. The humidifying element 42 is disposed on the upper drain pan 13A, and the drain of the humidifying element 42 flows down to the upper drain pan 13A. Therefore, by providing the humidifier 40 and performing the humidifying operation, the drain of the humidifying element 42 flows down to the upper drain pan 13A even during the heating operation in which no drain is generated in the heat exchanger 11.

The filter chamber 20 is disposed immediately below the main unit 1. In the filter chamber 20, a lower drain pan 13 </ b> B made of a synthetic resin such as a styrene resin is disposed immediately below the upper drain pan 13 </ b> A. The lower drain pan 13B is formed with a ventilation hole 25 communicating with the blowout opening 15 of the upper drain pan 13A and a substantially circular suction opening 26 communicating with the suction opening 14. The drain pan 13 is constituted by the lower drain pan 13B and the above-described upper drain pan 13A.
In the lower portion of the drain pan 13, a water reservoir 27 is formed for storing drain that flows down from the drain passage 16 </ b> A of the upper drain pan 13 </ b> A. The water reservoir 27 is a recess formed by cutting the drain pan 13 facing the suction opening 26, and extends along the one side plate 1A. Thus, by forming the water reservoir 27 in the drain pan 13, it is not necessary to provide the water reservoir 27 as a separate member, and the configuration can be simplified. Further, the drain can be easily caused to flow into the water reservoir 27 only by forming the drain passage 16 </ b> A in the drain pan 13.

A drain hose 28 for discharging the drain accumulated in the water reservoir 27 to the outside is connected to the water reservoir 27. Therefore, the drain that flows down from the heat exchanger 11 and the humidifying element 42 and flows into the water reservoir 27 from the drain passage 16 </ b> A is discharged from the drain hose 28 to the outside of the ceiling-embedded air conditioner 100.
The drain pan 13 is screwed with various components such as an electrical box (not shown) that houses a control circuit, a power supply circuit, and the like of the ceiling-embedded air conditioner 100.

On the lower surface of the filter chamber 20, a decorative panel 21 exposed in the conditioned room is attached by screws (not shown) or the like. The decorative panel 21 is formed with a suction port 22 that sucks in air in the conditioned room and a blowout port 23 that blows conditioned air that has passed through the heat exchanger 11 into the conditioned room. A louver 24 for changing is provided.
The suction port 22 communicates with the suction opening 26 of the filter chamber 20, and the blowout port 23 is formed at a position and a shape communicating with the ventilation hole 25 of the filter chamber 20.
Further, a suction grill 30 that fits into the suction port 22 is attached to the decorative panel 21. A suction port 31 for sucking room air is formed in the center of the suction grill 30, and the suction port 31 communicates with the suction opening 26 in a state where the suction grill 30 is fitted to the suction port 22.

  The ceiling-embedded air conditioner 100 configured as described above allows a refrigerant supplied from an outdoor unit (not shown) to pass through the heat exchanger 11 so that the heat exchanger 11 functions as an evaporator or a condenser. As shown in FIG. 3, the air in the conditioned room is sucked from the suction port 31 by the operation of the blower 9, and the indoor air is cooled or heated by passing through the heat opening 11 through the suction opening 26, the suction opening 14, and the nozzle 17. Use conditioned air. Then, the ceiling-embedded air conditioner 100 blows out conditioned air from the blowout opening 23 to the conditioned room through the blowout opening 15 and the vent hole 25 and cools or heats the conditioned room by the operation of the blower 9. During the heating operation, the humidification operation is performed, and the conditioned air conditioned by the heat exchanger 11 is humidified by passing through the humidification element 42.

A roll filter (filter) 50 is disposed in the suction opening 26 of the filter chamber 20. The roll filter 50 is a filter that collects dust floating in the suction air when passing through the air in the conditioned room sucked from the suction port 31 by the blower 9, and the suction port 31 side into which the room air enters. This surface becomes the collecting surface 50A to which dust adheres. The roll filter 50 is formed in a cylindrical shape by bonding the short sides of a single band-shaped filter material, and the width of the roll filter 50 is larger than the diameter of the suction opening 26. The roll filter 50 is bridged between guide rollers 51 and 52 disposed in the drain pan 13. These guide rollers 51 and 52 are respectively arranged outside the suction opening 26. That is, the roll filter 50 stretched between the guide rollers 51 and 52 covers the entire surface of the suction opening 26 and allows the suction air to pass between the guide rollers 51 and 52.
The roll filter 50 is in contact with a brush 60 for scraping off dust adhering to the collecting surface 50A of the roll filter 50.
Hereinafter, the arrangement structure of the roll filter 50 and the brush 60 will be described in detail.

FIG. 3 is an enlarged cross-sectional view of the drain pan 13.
The water reservoir 27 of the drain pan 13 includes a bottom surface 27 </ b> A, a low wall surface 27 </ b> B disposed inside the drain pan 13, a high wall surface 27 </ b> C disposed outside the drain pan 13, and a wall surface 27 </ b> D covering the short side of the water reservoir 27. An upper surface 27E is formed above the bottom surface 27A. The low wall surface 27 </ b> B is formed lower than the high wall surface 27 </ b> C by the amount that the roll filter 50 is disposed.
The water reservoir 27 is provided with a float switch S for detecting the water level. The float switch S is a switch that operates when the water level of the water reservoir 27 exceeds a predetermined upper limit water level. A drain hose 28 is connected to the lowermost portion of the high wall surface 27 </ b> C, and the drain hose 28 is provided with an electromagnetic valve (not shown). This solenoid valve is controlled to be opened when the float switch S is operated and when the dust D adhering to the roll filter 50 is removed.
A downstream port 16B of the drain passage 16A is provided above the water reservoir 27, and a draining member 16C for preventing the drain flowing out from the drain passage 16A from reaching the upper surface 27E is formed in the downstream port 16B. Has been. The draining member 16 </ b> C is a member that extends downward so as to surround the downstream port 16 </ b> B, and is integrally formed with the drain pan 13.

One guide roller 51 is disposed above the water reservoir 27 and one end of the roll filter 50 is accommodated. The guide roller 51 is disposed such that the shaft 51A of the guide roller 51 is positioned at least outside the suction opening 26, and the bottom 51B of the guide roller 51 is positioned slightly above the upper surface of the low wall surface 27B. It is rotatably supported on the wall surface directly or via a stay or the like.
A brush 60 is disposed outside the guide roller 51. The brush 60 is a rod-shaped member extending over the entire width of the roll filter 50, and includes a flocked portion 60 </ b> A. The drain pan 13 is in a state where the flocked portion 60 </ b> A is in contact with the collection surface 50 </ b> A of the roll filter 50. It is supported by the wall surface. The brush 60 is disposed on the inner side of the draining member 16C so as not to be drained from the drain passage 16A. That is, the guide roller 51 is disposed on the inner side by the width of the brush 60 than the draining member 16C. Such an arrangement prevents the roll filter 50 from being drained.
Thus, by providing the water reservoir 27 and the brush 60 on one end side of the roll filter 50, the roll filter 50, the water reservoir 27, and the brush 60 necessary for dust removal are disposed in the vicinity. Therefore, the configuration is simplified and downsized.

In the drain pan 13, a storage portion 29 that stores the other end of the roll filter 50 is formed facing the water reservoir portion 27. The storage portion 29 is a space formed by cutting the drain pan 13 facing the suction opening 26 into, for example, a rectangular shape in a side view, and extends along the water reservoir portion 27.
In the storage portion 29, the other guide roller 52 and a motor 53 that rotates the guide roller 52 are disposed adjacent to each other in the longitudinal direction. The guide roller 52 is disposed such that the shaft 52A of the guide roller 52 is positioned at least outside the suction opening 26, and the bottom portion 52B of the guide roller 52 is positioned slightly above the bottom surface 29A of the storage unit 29. It is rotatably supported on the wall surface directly or via a stay or the like. Thus, since the shafts 51A and 52A of the guide rollers 51 and 52 are disposed at least outside the suction opening 26, the roll filter 50 can cover the entire surface of the suction opening 26. It can be collected effectively. Further, since the roll filter 50 is disposed just above the upper surface of the low wall surface 27B of the water reservoir 27 and the bottom surface 29A of the storage 29, the intake air does not enter the water reservoir 27 and the storage 29. Almost all of the intake air passes through the roll filter 50.

  The motor 53 is disposed at the end of the storage portion 29 in the longitudinal direction and is screwed to the wall surface of the drain pan 13. A rotation shaft (not shown) of the motor 53 is connected to a shaft 52A of the guide roller 52, and the guide roller 52 is rotated by the rotation operation of the motor 53. The motor 53 is controlled to rotate in the direction of arrow A (counterclockwise direction) in FIG. 3, and the rotation of the motor 53 is transmitted to the guide roller 52. It is rotated in the direction of arrow B (counterclockwise direction).

Next, the operation will be described.
When the operation of the ceiling-embedded air conditioner 100 is stopped, such as at midnight, the motor 53 is operated. When the motor 53 is operated, the rotation of the motor 53 is transmitted to the guide roller 52, and the roll filter 50 is rotated by the rotation of the guide roller 52.
In the roll filter 50, the portion facing the suction opening 26 on the suction port 31 side functions as a filter through which the suction air passes, and the portion facing the suction opening 26 on the blower 9 side is not attached with dust D, and the suction port 31. Compared with the portion facing the suction opening 26 on the side, it is kept clean, so the length corresponding to half of the circumference of the roll filter 50 located on the suction port 31 side is taken as one time. Accordingly, by rotating the roll filter 50 of one length in the direction of arrow B, a relatively clean filter facing the suction opening 26 on the blower 9 side is fed out to the suction opening 26 side on the suction port 31 side. .

During the rotation of the roll filter 50, the dust D adhering to the collecting surface 50A facing the suction opening 26 on the suction port 31 side is scraped off by the water receiving portion 27 by the brush 60 that contacts the roll filter 50. The water is collected in the water reservoir 27 disposed below the brush 60.
When the rotation of the roll filter 50 is completed, the solenoid valve of the drain hose 28 is opened. Thereby, the dust D collected in the water reservoir 27 is discharged to the outside through the drain hose 28 together with the drain accumulated in the water reservoir 27.

  As described above, according to the present embodiment, the roll filter 50 that collects the dust of the intake air is disposed on the upstream side of the air of the heat exchanger 11, and the dust adhering to the roll filter 50 is stored in the water reservoir. The dust removed from the roll filter 50 is discharged to the outside together with the drain by allowing the dust dropped in the water reservoir 27 to be discharged by the drain accumulated in the drain pan 13. It is not necessary and the labor related to maintenance can be reduced.

  Further, according to the above embodiment, since the water reservoir 27 is formed in the drain pan 13, it is not necessary to provide the water reservoir 27 as a separate member, the configuration can be simplified, and the drain can be stored in the water. It can be easily poured into the portion 27.

  Further, according to the above embodiment, the roll filter 50 is supported on the drain pan 13, the water reservoir portion 27 communicating with the drain pan 13 is provided on one end side of the roll filter 50, and the dust of the roll filter 50 is provided in the water reservoir portion 27. By providing the brush 60 for dropping the water in the water reservoir 27, it is not necessary to separately provide a member for supporting the roll filter 50, and the configuration can be simplified. Further, the water reservoir 27 and the brush 60 are disposed in the vicinity of the roll filter 50, and the configuration is simple and downsized.

  Further, according to the embodiment, the filter chamber 20 is provided on the side of the suction opening 26 of the drain pan 13, the roll filter 50 is supported on the filter chamber 20, and the water reservoir communicated with the drain pan 13 on one end side of the roll filter 50. The portion 27 is provided, and the water reservoir portion 27 is provided with the brush 60 for dropping the dust of the roll filter 50 to the water reservoir portion 27, so that it is not necessary to separately provide a member for supporting the roll filter 50, and the configuration is simplified. Can be Further, the water reservoir 27 and the brush 60 are disposed in the vicinity of the roll filter 50, and the configuration is simplified and reduced in size.

  In addition, according to the above embodiment, the filter is the roll filter 50 and is formed by winding the belt-shaped filter material having a width larger than the diameter of the circular suction opening 26 of the drain pan 13 disposed in the suction opening 26 of the drain pan 13. With this configuration, the entire surface of the circular suction opening 26 is covered with the roll filter 50, and the dust of suction air can be effectively collected by the roll filter 50.

  Moreover, according to the said embodiment, the humidifier 40 which humidifies the air heat-exchanged with the heat exchanger 11 is provided, and the drain of this humidifier 40 is poured in order of the drain pan 13 and the water reservoir part 27, and a water reservoir part. Since the dust dropped on 27 can be discharged by the drain, the dust removed from the roll filter 50 is discharged together with the drain of the humidifier 40 during the humidifying operation. For this reason, by performing the humidification operation during the heating operation, even during the heating operation in which no drain is generated in the heat exchanger 11, no dust disposal work is required, and the labor involved in maintenance can be reduced.

However, the above embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the drain accumulated in the water reservoir 27 is discharged by the drain hose 28. However, a drain pump is provided as a discharge means in the water reservoir 27, and this drain pump provides the water reservoir 27 with the drain pump. It is good also as a structure which discharges the accumulated drain.

  Moreover, in the said embodiment, although the brush 60 which has the hair transplant part 60A was provided as a removal means, the removal means contact | abuts the collection surface 50A of the roll filter 50, and can remove the dust adhering to 50 A of collection surfaces. If it is, it will not be limited to this.

  Furthermore, in the said embodiment, although it was set as the structure which always contacts the collection surface 50A of the roll filter 50 with the brush 60 as a removal means, and scrapes off the dust adhering to the collection surface 50A, Alternatively, a removing means that swings may be provided so that dust adhering to the collection surface 50A is knocked down.

  Moreover, in the said embodiment, although it was set as the structure which provides the roll filter 50 horizontally in the suction opening 26 of the drain pan 13, the filter should just be arrange | positioned in the air upstream of the heat exchanger 11, for example, the air blower 9 It may be arranged on the outlet side and vertically on the air upstream side of the heat exchanger 11.

  In the above embodiment, the roll filter 50 is provided as a filter, and the dust adhered to the collection surface 50A is removed by the brush 60 while the roll filter 50 is rotated. A removing unit that moves along the filter may be provided, and the dust removed by the removing unit may be dropped in a water reservoir, and the dust dropped in the water reservoir may be discharged by the drain accumulated in the drain pan.

It is a perspective view which shows the state which removed the suction grill of the ceiling-embedded air conditioner which concerns on this invention. It is sectional drawing which shows a ceiling embedded type air conditioner. It is sectional drawing which expands and shows a drain pan.

Explanation of symbols

1 Main unit 9 Blower 11 Heat exchanger 13 Drain pan 14 Suction opening (suction port)
26 Suction opening (suction port)
20 Filter chamber 27 Water reservoir 28 Drain hose 31 Suction port 40 Humidifier (humidifying means)
50 Roll filter (filter)
60 brush (removal means)
100 Ceiling embedded air conditioner

Claims (3)

In the ceiling-embedded air conditioner that has a blower, a heat exchanger, and a drain pan, and a suction portion of the blower faces a suction port provided in the drain pan,
Arranging a filter that collects the dust of the intake air at the suction port of the drain pan, supporting the filter to the drain pan ,
The drain pan includes an upper drain pan that covers a lower surface of the heat exchanger,
In the drain pan, a water reservoir portion communicating with the upper drain pan is formed inside one end of the filter,
The water reservoir is the inlet side of the drain pan, provided with a wall for accommodating one end of the filter above the water reservoir, said to removing means overlooked dust adhering to the filter in the water reservoir Prepare above the sump,
Ceiling embedded air conditioner which is characterized in that it has can be discharged by the drain accumulated dust dropped in the water reservoir to the upper pan. 2. The filter according to claim 1, wherein the filter is a roll filter, and is formed by winding a band-shaped filter material having a width larger than the diameter of the circular suction port of the drain pan, disposed at the suction port of the drain pan. Embedded ceiling air conditioner. A humidifying means for humidifying the air heat-exchanged by the heat exchanger;
Flow the drain of this humidifying means in the order of the drain pan and the water reservoir,
The ceiling-embedded air conditioner according to claim 1 or 2 , wherein the dust dropped in the water reservoir can be discharged by the drain.

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