JP7213475B2 - Ceiling-mounted indoor unit - Google Patents

Description

The present invention relates to a ceiling-embedded indoor unit.

Conventionally, a ceiling-mounted indoor unit is provided with a drain accommodating portion for receiving drain water from a heat exchanger, and a drain hole is formed at the deepest part of the drain accommodating portion for extracting the drain water in the drain accommodating portion. In addition, in the drain discharge device in which a drain plug is detachably provided in the drain hole, a bacteriostatic action is exerted on the drain water at a position above the drain plug within the drain accommodating portion. A technique is disclosed in which an antibacterial agent unit having an antibacterial agent is arranged so that the antibacterial agent unit can be taken out when the drain plug is removed in order to remove the drain water in the drain accommodating part. (See Patent Document 1, for example).

In addition, a heat exchanger, a drain pan provided below the heat exchanger for storing drain water from the heat exchanger, and a water-soluble antibacterial agent that is screwed and fixed inside the drain pan, A technique is disclosed in which a container is provided to allow drain water accumulated in the drain pan to flow in and out, and the container is fixed inside the drain pan (see, for example, Patent Document 2).

JP 2006-194493 A Japanese Patent Application Laid-Open No. 2007-205668

However, in the technique of Patent Document 1, the antibacterial agent unit is attached to the drain pump, and vibration of the drain pump causes the antibacterial agent unit to vibrate, causing noise.
Moreover, in the technique of Patent Document 2, there is a problem that a container for containing the antibacterial agent is separately required, which causes an increase in the number of parts and complicates the structure.
Furthermore, in any technique, the antibacterial agent is kept in contact with the drain water at all times, resulting in a shortened life of the antibacterial agent.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a ceiling-embedded indoor unit having a simple structure and capable of prolonging the life of an antibacterial agent.

In order to achieve the above object, the present invention provides a heat exchanger housed inside a housing, a drain pan storing drain water generated in the heat exchanger, a drain pump discharging the drain water, wherein the drain water stored in the drain pan is drained to the outside through a drain port, wherein the drain port is located at a corner of the drain pan, and the drain port has A drainage member is provided, and a holding member is integrally attached to the drainage member to hold the antibacterial agent storage member at a predetermined distance from the upper surface of the drain pan, and the predetermined distance is maintained by the operation of the drain pump. is discharged, the antibacterial agent does not come into contact with the drain water, and when the drain pump stops and the drain water returns, the antibacterial agent contacts the return water . , the drain member comprises a support plate arranged on the upper surface of the drain pan and a support pin extending upward from the tip of the support plate, the holding member being attached to the upper end of the support pin, The drain pan is formed with a support portion that supports a part of the storage member held by the holding member .

According to this, since the holding member for holding the storage member is attached by the drain member provided at the drain port, the storage member can be held at a position separated from the upper surface of the drain pan by a predetermined distance. As a result, the antibacterial treatment is not performed by the containing member while the drain is being discharged by the drain pump, and the antibacterial treatment is performed when a predetermined amount of the drain is stored, thus performing the efficient antibacterial treatment. Therefore, it is possible to extend the life of the antibacterial agent.

According to the ceiling-embedded indoor unit of the present invention, the holding member for holding the storage member is attached to the drainage member provided at the drain port, so that the storage member is separated from the upper surface of the drain pan by a predetermined distance. can be held in place. As a result, the antibacterial treatment is not performed by the containing member while the drain is being discharged by the drain pump, and the antibacterial treatment is performed when a predetermined amount of the drain is stored, thus performing the efficient antibacterial treatment. This makes it possible to extend the life of the antibacterial agent. Further, since the holding member is integrally formed with the drain member, the number of parts can be reduced. Furthermore, since the holding member is attached to the drain pan via the drain member, vibration of the drain pump is not transmitted, Noise can be prevented.

FIG. 1 is a perspective view showing a ceiling-embedded indoor unit according to the present invention; Bottom view of the ceiling-embedded indoor unit of the present embodiment A bottom view showing a state in which the decorative panel of the ceiling-embedded indoor unit of the present embodiment is removed. Longitudinal sectional view of the ceiling-embedded indoor unit of the present embodiment Partial cross-sectional view of the drain pan of the present embodiment Partial perspective view of the drain pan of the present embodiment

A first invention comprises a heat exchanger housed inside a housing, and a drain pan in which drain water generated in the heat exchanger is stored, and the drain water stored in the drain pan is discharged from a drain port. In the ceiling-embedded indoor unit in which water is drained to the outside through a A holding member is integrally attached to hold the storage member at a predetermined distance from the upper surface of the drain pan.
According to this, since the holding member for holding the storage member is attached by the drain member provided at the drain port, the storage member can be held at a position separated from the upper surface of the drain pan by a predetermined distance. As a result, the antibacterial treatment is not performed by the containing member while the drain is being discharged by the drain pump, and the antibacterial treatment is performed when a predetermined amount of the drain is stored, thus performing the efficient antibacterial treatment. This makes it possible to extend the life of the antibacterial agent. In addition, since the holding member is integrally formed with the drain member, the number of parts can be reduced. Further, since the holding member is attached to the drain pan via the drain member, vibration of the drain pump is not transmitted. Noise can be prevented.

In a second aspect of the invention, the drain member includes a support plate arranged on the upper surface of the drain pan and a support pin extending upward from the tip of the support plate, and the holding member includes the upper end of the support pin. attached to the part.
According to this, since the containing member for the antibacterial agent is held by the holding member attached to the upper end of the support pin, the drain and the containing member come into contact with each other until a predetermined amount of drain is stored in the drain water passage. It is possible to perform efficient antibacterial treatment without In addition, since the storage member is attached to the support pin, the structure is simple, and since the storage member is attached at a position away from the drain water passage, it is possible to secure a space for maintenance work, which facilitates maintenance work. It can be carried out.

In a third aspect of the invention, the drain pan is formed with a support portion that supports a part of the storage member held by the holding member.
According to this, the rear end portion of the storage member is supported by the support portion, and the storage member can be positioned.

In a fourth aspect of the invention, the support pin is arranged on the center side of the housing with respect to the drain port.
According to this, it is possible to prevent the storage member from interfering with the drain pump and the float switch.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a ceiling-embedded indoor unit according to an embodiment of the present invention. FIG. 2 is a bottom view of the ceiling-embedded indoor unit. FIG. 3 is a bottom view showing a state in which the decorative panel of the ceiling-embedded indoor unit is removed. FIG. 4 is a longitudinal sectional view of the ceiling-embedded indoor unit.

The ceiling-embedded indoor unit 100 includes a box-shaped housing 1 installed on the ceiling and having an open bottom, and a decorative panel 13 covering the lower opening of the housing 1 .
As shown in FIG. 4 , a centrifugal blower 3 is housed inside the housing 1 , and a substantially U-shaped heat exchanger 5 is provided inside the housing 1 so as to surround the centrifugal blower 3 . are placed.
The open portion of the heat exchanger 5 is provided with a partition plate (not shown) that closes the open portion, and the partition plate is formed in a mountain shape protruding toward the inside of the heat exchanger 5 .

As shown in FIG. 4, a drain pan 7 made of a heat insulating material made of expanded polystyrene is fitted in the opening of the lower surface of the housing 1 . The upper surface of the drain pan 7 is formed with a recess 7A having a substantially U-shape in plan view corresponding to the shape of the heat exchanger 5, and the heat exchanger 5 is installed in the recess 7A.
As shown in FIG. 3 , rectangular discharge ports 8 and 9 extending along the longitudinal direction of the housing 1 are formed on both sides of the drain pan 7 . A circular central opening 10 is provided substantially in the center of the drain pan 7 , and a resin bell mouth 11 of the centrifugal blower 3 is arranged in the central opening 10 .

As shown in FIG. 3 , an electrical box 21 and an elevating device 31 for the center panel 17 are installed on the lower surface side of the drain pan 7 .
The electrical equipment box 21 is arranged on one side in the longitudinal direction of the housing 1 with the bell mouth 11 interposed therebetween, and the lifting device 31 is arranged on the other side in the longitudinal direction of the housing 1 . The lifting device 31 is fixed so as to float from the drain pan 7 , and a ventilation path is secured between the drain pan 7 and the lifting device 31 .
Although not shown, the electrical equipment box 21 accommodates a control section that centrally controls each section. The control unit includes a CPU as an arithmetic execution unit, basic control programs executable by the CPU, memories such as ROM and RAM for storing predetermined data, and other peripheral circuits.

The lifting device 31 is for lifting and lowering the center panel 17 via four suspension cords 22, as shown in FIG. The center panel 17 is vertically suspended from the decorative panel 13 by the lifting device 31 .
When cleaning the suction filter 18, the center panel 17 can be lowered to an appropriate position, and the suction filter 18 can be removed from the center panel 17 for cleaning.

Below the drain pan 7, as shown in FIG. 2, a decorative panel 13 is arranged.
A large rectangular opening 13A is formed in the center of the decorative panel 13 . A center panel 17 made of sheet metal is arranged in the opening 13A. A suction filter 18 is attached to the upper surface of the center panel 17, as shown in FIGS. A peripheral portion of the suction filter 18 abuts against a sealing surface (not shown) of the drain pan 7 .
A pair of rectangular panel-side outlets 14 and 15 are formed in the decorative panel 13 so as to correspond to the outlets 8 and 9 of the drain pan 7 . The panel-side outlets 14 and 15 are swingably provided with wind direction changing blades 16 capable of adjusting the air blowing direction.
Indoor air is sucked in through the opening 13A by the centrifugal blower 3, passes through the heat exchanger 5, undergoes heat exchange, and is sent into the room through the panel-side outlets 14 and 15 after air conditioning.
The ceiling-embedded indoor unit 100 of this embodiment is a so-called two-way cassette type ceiling-embedded indoor unit 100 provided with a pair of panel-side outlets 8 and 9 .

FIG. 5 is a cross-sectional view of part of the drain pan 7. As shown in FIG. 6 is a perspective view of part of the drain pan 7. FIG.
A drain water passage 40 is formed in the drain pan 7 along the outer circumference of the drain pan 7 . The drain water passage 40 is located below the heat exchanger 5 on the outer peripheral side.
The drain water passage 40 is formed in a rectangular shape along the lower surface of the heat exchanger 5 in plan view. The drain water passage 40 is formed so that one of its four corners is the highest, and the corner corresponding to the diagonal line of the corners is the lowest.
As a result, the drain dripping from the heat exchanger 5 flows through the drain water passage 40 and is stored at the lowest corner.

As shown in FIG. 5, the housing 1 is provided with a drain pump 41 that discharges drain water at a location corresponding to the lowest position of the drain water passage 40 . In the vicinity of the drain pump 41, a float switch 42 is arranged to detect whether or not the level of the drain stored in the drain water passage 40 has reached a predetermined level. When the float switch 42 detects that the drain has reached a predetermined water level, the drain pump 41 is driven to discharge the drain.

A drain port 43 penetrating through the drain pan 7 is provided at the lowest bottom surface of the drain water passage 40 . A drainage member 50 made of resin is attached to the drainage port 43 . The drain member 50 includes a pipe portion 51 into which the drain pan 7 is inserted into the drain port 43, a support plate 52 located on the upper surface of the drain pan 7 and integrally formed with the pipe portion 51, and a tip portion of the support plate 52 extending upward. and extending support pins 53 .
A frame-shaped holding member 54 is detachably attached to the upper end of the support pin 53 with a screw 55 . A bag-shaped storage member 56 containing silver ions, which is an antibacterial agent, is sandwiched and held by the holding member 54 . Thereby, the storage member 56 is configured to be able to be held at a position separated from the upper surface of the drain pan 7 by a predetermined distance.
When the drain pump 41 is stopped after operating the drain pump 41 to discharge the drain, a predetermined amount of drain returns to the drain pan 7 to generate return water. Therefore, the predetermined distance from the upper surface of the drain pan 7 of the storage member 56 is set to such a distance that the antibacterial agent in the storage member 56 comes into contact with the return water when the drain returns.
A cover member 57 is attached to the pipe portion 51 of the drain member 50 to block the drain port 43 .

A support portion 57 is formed in a stepped shape on the center side of the drainage member 50 of the drain pan 7 to support the rear end portion of the storage member 56 . As a result, the storage member 56 is supported at its rear end by the support portion 58, and the storage member 56 can be positioned. A drain pump 41 is arranged at the drain port 43 of the drain pan 7 , and a float switch 42 is arranged outside the housing 1 from the drain pump 41 . By arranging it on the central side, interference with the drain pump 41 and the float switch 42 can be prevented.

Next, the operation of this embodiment will be described.
In this embodiment, when the centrifugal blower 3 is operated, as indicated by the arrow in FIG. to enter the recess on the lower surface of the drain pan 7. Then, it passes through the bell mouth 11 of the centrifugal fan 3 and is sucked into the space on the primary side of the heat exchanger 5 . The air that has entered the primary side space is given centrifugal force by the centrifugal blower 3, goes outward, undergoes heat exchange in the heat exchanger 5, and then enters the secondary side space, where the air flows into the space as indicated by the arrow. , and passes through outlets 8 and 9 and is blown into the room from panel side outlets 14 and 15 .

Also, the drain dripped from the heat exchanger 5 flows through the drain water passage 40 of the drain pan 7 to the lowest corner and is stored. When the float switch 42 detects that the drain has reached a predetermined water level, the drain pump 41 is operated to discharge the drain.
At this time, since the storage member 56 for the antibacterial agent is held by the holding member 54 attached to the upper end portion of the support pin 53, the drain and the storage member 56 are kept closed until a predetermined amount of drain is stored in the drain water passage 40. does not come into contact with That is, while the drain pump 41 is operating and discharging the drain, the antibacterial treatment by the storage member 56 is not performed, and the antibacterial treatment is performed when a predetermined amount of drain is stored in the drain water passage 40. As a result, efficient antibacterial treatment can be performed.
Further, since the storage member 56 is detachably attached to the support pin 53 by screws, the structure is simple, and since the storage member 56 is attached at a position distant from the drain water passage 40, the space for maintenance work is saved. can be secured, and maintenance work can be easily performed.

As described above, in the present embodiment, the heat exchanger 5 accommodated inside the housing 1 and the drain pan 7 in which the drain water generated by the heat exchanger 5 is stored. is located at the corner of the drain pan 7, the drain port 43 is provided with a drain member 50, and the drain member 50 has a holding member 54 that holds an antibacterial agent storage member 56 with a predetermined distance from the upper surface of the drain pan 7. are attached together.
According to this, since the holding member 54 for holding the storage member 56 is attached by the drain member 50 provided in the drain port 43, the storage member 56 can be held at a predetermined distance from the upper surface of the drain pan 7. can. As a result, the antibacterial treatment is not performed by the storage member 56 while the drain pump 41 is discharging the drain, and the antibacterial treatment is performed when a predetermined amount of drain is stored, resulting in an efficient antibacterial treatment. It is possible to do Further, since the holding member 54 is integrally formed with the drain member 50, the number of parts can be reduced. Further, since the holding member 54 is attached to the drain pan 7 via the drain member 50, the vibration of the drain pump 41 is transmitted. Therefore, noise can be prevented.

Further, in this embodiment, the drain member 50 includes a support plate 52 arranged on the upper surface of the drain pan 7 and a support pin 53 extending upward from the tip of the support plate 52. The holding member 54 includes: It is attached to the upper end of the support pin 53 .
According to this, since the storage member 56 for the antibacterial agent is held by the holding member 54 attached to the upper end portion of the support pin 53, the drain water passage 40 can be filled with the drain water until a predetermined amount of drain water is stored. Without contact with the member 56, efficient antibacterial treatment can be performed. In addition, since the storage member 56 is attached to the support pin 53, the structure is simple, and since the storage member 56 is attached at a position away from the drain water passage 40, a space for maintenance work can be secured and maintenance can be performed. Work can be done easily.

Further, in this embodiment, the drain pan 7 is formed with a support portion 58 that supports a part of the storage member 56 held by the holding member 54 .
According to this, the storage member 56 is supported at the rear end portion by the support portion 58, and the storage member 56 can be positioned.

Further, in this embodiment, the support pin 53 is arranged on the central side of the housing 1 with respect to the drain port 43 .
According to this, it is possible to prevent the storage member 56 from interfering with the drain pump 41 and the float switch 42 .

Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments. Since this is merely an example of one embodiment of the present invention, it can be arbitrarily modified and applied without departing from the scope of the present invention.

As described above, in the ceiling-embedded indoor unit according to the present invention, the storage member can be held at a predetermined distance from the upper surface of the drain pan, and efficient antibacterial treatment can be performed. In addition, the number of parts can be reduced, and it can be suitably used as a ceiling-embedded indoor unit capable of preventing noise.

1 Case 3 Centrifugal Blower 5 Heat Exchanger 7 Drain Pan 13 Decorative Panel 16 Wind Direction Changing Blade 17 Center Panel 18 Blower 31 Lifting Device 40 Drain Water Passage 41 Drain Pump 42 Float Switch 43 Drain Port 50 Drain Member 51 Pipe Part 52 Support Plate 53 Support pin 54 Holding member 56 Storage member 57 Lid member 58 Supporting part 100 Ceiling-embedded indoor unit

Claims (3)

A heat exchanger housed inside a housing, a drain pan storing drain water generated in the heat exchanger, and a drain pump discharging the drain water, wherein the drain water stored in the drain pan is a ceiling-mounted indoor unit that drains to the outside through a drain outlet,
The drain port is located at a corner of the drain pan, the drain port is provided with a drain member, and the drain member includes a holding member that holds the antibacterial agent storage member at a predetermined distance from the upper surface of the drain pan. are attached together,
The predetermined distance is such that the antibacterial agent does not come into contact with the drain water while the drain pump is operating to discharge the drain water, and the antibacterial agent does not come into contact with the drain water when the drain pump stops and the drain water returns. The distance is such that the antibacterial agent is in contact with water,
The drainage member includes a support plate arranged on the upper surface of the drain pan, and a support pin extending upward from the tip of the support plate,
One end of the holding member is attached to the upper end of the support pin,
The ceiling-embedded indoor unit , wherein the drain pan is formed with a support portion that supports the other end of the holding member that holds the storage member . 2. The ceiling-embedded indoor unit according to claim 1, wherein a gap is formed over the entire area between the storage member and the upper surface of the drain pan. 2. The ceiling-embedded indoor unit according to claim 1, wherein the support pin is arranged on the center side of the housing with respect to the drain port.

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