JPWO2016170669A1 - Indoor unit for air conditioning - Google Patents

Abstract

There is a demand for an air conditioning indoor unit that can easily perform maintenance by taking in and out a drain pan disposed at the rear of the main body casing from the front surface of the main body casing. The indoor unit for air conditioning includes a main body casing formed in a box shape, a first heat exchanger built in the main body casing so that a lower end portion is located at a rear portion in the main body casing, and a heat built in the main body casing. A blower for blowing room air to the exchanger, a first drain pan disposed below the lower end of the first heat exchanger, a maintenance opening formed on the front surface of the main casing, and the maintenance opening A guide mechanism for guiding the first drain pan charged in the casing to a standby position located below the lower end of the first heat exchanger, and a first drain pan for the standby position A and the lower end of the first heat exchanger. And an elevating mechanism that elevates and lowers between the position B directly below.

Description

  The present invention relates to an indoor unit for air conditioning, and more particularly to a technique for facilitating maintenance of the inner part of the casing from the front surface of the casing.

  Conventionally, a general large-capacity air conditioner consumes more power for a fan motor than a general home air conditioner. Therefore, even by reducing the power consumption of the fan motor, It will lead to higher efficiency. As a blower provided in such a large-capacity air conditioner, a centrifugal fan is generally provided. Among them, a turbo fan having a high blowing efficiency is preferred. For example, the blowing efficiency of a sirocco fan is about 45 to 60%, whereas the blowing efficiency of a turbo fan is as high as about 65 to 80%.

Generally, the casing of the sirocco fan is formed in a scroll shape that increases the blowing efficiency. However, in the case of a turbo fan, since the casing shape has little influence on the blowing efficiency, it is often formed in a box-like casing instead of a scroll-like casing for the convenience of manufacturing.

As an air conditioner equipped with the above-described turbo fan, a device using an indoor unit for air conditioning as shown in Patent Document 1 has been proposed. The indoor unit for air conditioning described in this document is a floor-standing indoor unit, and an implementation mode using a turbo fan is shown.

JP 2014-119126 A

  As a conventional indoor unit for air conditioning, a motor is arranged in a posture in which a rotary drive shaft is vertically oriented, and a turbo fan is mounted on the motor. This indoor unit for air conditioning has a structure in which the air intake port of the turbofan faces upward. Therefore, mounting the heat exchanger in a square shape when viewed from the side does not result in a wind path configuration that closes the air intake port of the turbofan, and leads to a reduction in air path resistance. Moreover, in order to increase the heat transfer area of the heat exchanger, the C-shaped arrangement is preferable.

However, when the heat exchanger is arranged in a square shape in a side view, two drain pans are provided at the front and rear in the main body casing so that the condensed water of the heat exchanger arranged on the rear side of the main body casing can be received. Is required. Since the drain pan service is a daily inspection, it is preferable that it can be easily performed. For example, the drain pan can be easily removed and attached. However, the drain pan disposed in the rear part in the main body casing is difficult to reach from the front surface of the main body casing serving as a service area. Therefore, conventionally, the service is such that the drain pan is taken in and out from the side surface of the main casing.

Reduction of service space has the same effect as space saving of installation area. For this reason, it is very significant to provide a service only from the front side of the main casing without providing a service space on the side of the main casing.

The present invention has been made to solve the above-described problems, and is an air conditioner that can easily perform maintenance by taking in and out the drain pan disposed at the rear part in the main body casing from the front surface of the main body casing. The purpose is to provide indoor units.

The indoor unit for air conditioning according to the present invention includes a main body casing formed in a box shape, a heat exchanger built in the main body casing so that a lower end portion is located at a rear portion in the main body casing, and a main body casing. A blower for blowing room air to the heat exchanger, a drain pan disposed below the lower end of the heat exchanger, a maintenance opening formed on the front surface of the main casing, and the maintenance opening into the main casing A guide mechanism for guiding the charged drain pan to a standby position located below the lower end of the heat exchanger, and an elevating mechanism for raising and lowering the drain pan between the standby position and a position directly below the lower end of the heat exchanger; It is characterized by comprising.

The indoor unit for air conditioning according to the present invention includes a drain pan disposed at the rear portion of the main body casing, a maintenance opening formed on the front surface of the main body casing, a guide mechanism, and an elevating mechanism. The drain pan inserted into the main casing from the opening for use can be pushed by hand or the like and guided to the standby position below the lower end of the heat exchanger by the guide mechanism. And the drain pan which came to the standby position can be raised and installed by the raising / lowering mechanism to the position directly under the lower end part of a heat exchanger. That is, there is an effect that the first drain pan disposed at the rear portion in the main body casing can be easily serviced from the front side of the main body casing due to the air path configuration.

It is a perspective view which shows a part of air conditioning indoor unit and its internal structure in Embodiment 1 of this invention. It is a front view which shows the said indoor unit for an air conditioning, and its internal structure. It is a disassembled perspective view which shows a part of said indoor unit for air conditioning and its internal structure. It is a side view which shows the said indoor unit for an air conditioning, and its internal structure. It is a perspective view which shows the rod support part used for the raising / lowering mechanism of the said indoor unit for an air conditioning. It is a side view which shows the drain pan raising operation | movement of the said indoor unit for an air conditioning. It is a side view which shows the indoor unit for air conditioning in Embodiment 2 of this invention, and its internal structure. It is a side view which shows the drain pan raising operation | movement of the indoor unit for an air conditioning in the said Embodiment 2.

Embodiment 1 FIG.
1 is a perspective view showing a part of an air conditioning indoor unit and its internal structure according to Embodiment 1 of the present invention, FIG. 2 is a front view showing the air conditioning indoor unit and its internal structure, and FIG. 3 is the air conditioning unit. An exploded perspective view showing the indoor unit and a part of the internal structure thereof, and FIG. 4 are a side view showing the indoor unit for air conditioning and the internal structure thereof, respectively.
In each figure, the indoor unit for air conditioning according to this embodiment includes a main body casing 12 formed in a box shape, and a first heat built in the main body casing 12 so that the lower end portion 11b is positioned at the rear part in the main body casing 12. Separately from the exchanger 1b and the first heat exchanger 1b, the second heat exchanger 1a built in the main body casing 12, and the first heat exchanger 1b and the second heat exchanger 1a built in the main body casing 12 Turbo fans (blowers) 5 and 5 for blowing indoor air, a first drain pan 2b disposed below the lower end 11b of the first heat exchanger 1b, and a lower end 11a of the second heat exchanger 1a And a second drain pan 2a to be deployed.

The main body casing 12 has, for example, dimensions of 1995 × 2380 × 1080 (H × W × D) mm, and the depth dimension D is a dimension that is difficult for human hands to reach from the front surface 12A. An air inlet 13 for taking in indoor air is formed on the upper surface of the main casing 12. An air outlet 14 is formed on the lower surface of the main casing 12 to blow out the conditioned air blown by the turbo fans 5 and 5 through the first heat exchanger 1b and the second heat exchanger 1a. Also, a horizontally long maintenance opening 9 into which the first drain pan 2b and the second drain pan 2a can be taken in and out is formed in the front surface 12A of the main body casing 12. The maintenance opening 9 is normally covered with a lid member (not shown).

  The first heat exchanger 1b and the second heat exchanger 1a are partly incorporated in a refrigerant circuit (not shown), and are heat exchangers used as cooling evaporators that generate condensed water on the surface of the apparatus. is there. In order to catch the condensed water, a first drain pan 2b and a second drain pan 2a are arranged at positions immediately below the lower end 11b of the first heat exchanger 1b and the lower end 11a of the second heat exchanger 1a. These first drain pan 2b and second drain pan 2a are box-shaped with an upper surface opened in order to receive the condensed water dropped from the first heat exchanger 1b and the second heat exchanger 1a disposed above. It has a shape. In addition, the first drain pan 2b and the second drain pan 2a are each formed with support plate portions 4 and 4 projecting outward on the left and right side surfaces of the pan body. And the 1st heat exchanger 1b and the 2nd heat exchanger 1a are arrange | positioned at the substantially C shape by the side view. That is, the first heat exchanger 1b is arranged so that the lower end portion 11b is located at the rear part (the far side far from the service space) in the main body casing 12, and the second heat exchanger 1a is arranged in front of the main body casing 12. It is arranged so that the lower end portion 11a is positioned on the portion (front side as viewed from the service space).

The two turbo fans 5 and 5 are installed side by side at the bottom in the main body casing 12, and are installed below the first drain pan 2b and the second drain pan 2a. These turbo fans 5 and 5 are all arranged with the fan rotation drive shaft 20 connected to the motor rotation drive shaft (not shown) oriented vertically and the air suction port 19 facing upward. The air blowing direction of each turbo fan 5 is, for example, a horizontal direction, but the air blown into the fan casing 21 from the turbo fan 5 is further blown downward from the air blower outlet 14 of the main body casing 12. Yes.

The left and right guide mechanisms 3a and 3b guide the first drain pan 2b disposed in the main body casing 12 between the maintenance opening 9 and the standby position A and pushed by a hand or a rod back and forth. A front and rear rail portion 17, a vertical rail portion 18 disposed between the standby position A and a position B directly below the lower end portion 11b of the first heat exchanger 1b to guide the first drain pan 2b up and down, and a second drain pan And an upper and lower rail portion 18A that is disposed between a standby position Aa of 2a and a position Ba directly below the lower end portion 11a of the second heat exchanger 1a and guides the second drain pan 2a up and down.

These guide mechanisms 3 a and 3 b are arranged on the left and right side surfaces in the main body casing 12. The guide mechanism 3 b on the right side (left side when viewed from the front of the figure) is provided on the right wall surface in the main body casing 12. The guide mechanism 3b can be the same component as the frame of the main body casing 12, and is also effective as a strength member. The left guide mechanism 3 a is disposed between the left wall surface in the main body casing 12 and the fan casing 21 of the turbofan 5 because the left space in the main body casing 12 is a piping wiring space 30. In other words, the left and right guide mechanisms 3a and 3b are arranged so that the first drain pan 2b inserted into the main body casing 12 from the maintenance opening 9 to the standby position A located below the lower end portion 11b of the first heat exchanger 1b. It is designed to guide you.

The left and right elevating mechanisms 15a and 15b are respectively provided at the front portion of the main body casing 12 and operated to be moved back and forth, and the first drain pan disposed below the standby position A and at the standby position A. A crank mechanism 6 that moves up and down 2b, a connecting rod 16 that connects the handle portion 7 and the other end of the crank mechanism 6, a rod support portion 8 that supports the connecting rod 16 so as to be movable back and forth, and guide mechanisms 3a and 3b. The rod support portion 8 </ b> A is provided below the upper and lower rail portions 18 and 18 to support the crank mechanism 6, and the locking member 10 is provided on the connecting rod 16. In other words, the left and right elevating mechanisms 15a and 15b elevate and lower the first drain pan 2b between the standby position A and the position B directly below the lower end portion 11b of the first heat exchanger 1b.

  Each crank mechanism 6 includes a fixed pivot 22 attached to the rear frame of the main casing 12, a node 23 having one end pivotably supported on the fixed pivot 22, and the other end of the node 23 pivoted up and down. A pivot 24 that is pivotally supported; a node 25 that is pivotally supported at one end thereof by the pivot 24; a pivot 26 that pivotally supports the other end of the node 25 and one end of 16; It is composed of The left and right crank mechanisms 6 and 6 are configured to lift the first drain pan 2b at the standby position A to a position B directly below the lower end portion 11b of the first heat exchanger 1b.

As shown in FIG. 5, the rod support portion 8 includes a bag portion 8 </ b> C extending in a concave shape that holds the connecting rod 16 slidably in the front-rear direction, and screws extending on the upper and lower sides of the bag portion 8 </ b> C. It is comprised from the board part 8B for fixing and 8B for a stop. The fixing plate portions 8B and 8B are fixed to the side surface of the fan casing 21 of the turbo fan 5 with screws or the like. The bag portion 8C of the rod support portion 8 is detachably engaged with the locking member 10 provided on the connecting rod 16, and is configured to stop the movement of the connecting rod 16 at the engagement position.

Next, the operation will be described.
In the air conditioning indoor unit configured as described above, the left and right support plate portions 4 and 4 of the drain pans 2b and 2a are placed on the front and rear rail portions 17 and 17 of the left and right guide mechanisms 3a and 3b. It is slidably guided. Accordingly, the service person inserts the first drain pan 2b into the main body casing 12 from the maintenance opening 9, and places the left and right support plate portions 4 and 4 on the left and right front and rear rail portions 17 and 17, respectively. Thereafter, when the first drain pan 2b is pushed into the interior of the main body casing 12 by hand or the like, the first drain pan 2b stops against the sheet metal existing at the innermost portion of the front and rear rail portion 17, and the position in the front and rear direction is determined (see FIG. 4). This position is the standby position A. In this state, since there is a large space in the vertical direction between the lower end portion 11b of the first heat exchanger 1b and the standby position A, the condensed water dripping from the first heat exchanger 1b may jump out and jump out. There is a risk that the drain pan 2b cannot receive the entire amount.

On the other hand, a handle portion 7 appears on the front surface of the main body casing 12. Therefore, when the service person pushes the handle portion 7 into the back (backward) of the main body casing 12 by hand, the portion of the pivot 24 of the crank mechanism 6 moves upward, and the first drain pan 2b located at the standby position A is removed. Lift up to a position B directly below. At this time, the locking member 10 of the connecting rod 16 is located on the far side beyond the rod support portion 8. Therefore, when the force of the hand is loosened, the locking member 10 is pushed back by the weight of the first drain pan 2b and locked to the bag portion 8C of the rod support portion 8, and the first drain pan 2b is fixed at the position B immediately below. On the other hand, the second drain pan 2a is inserted from the maintenance opening 9 and placed on the front and rear rails 17 and 17, and then guided by the upper and lower rails 18A by hand or the like. It is lifted to a position Ba immediately below 1a and fixed with a locking member such as a screw.
Thus, when the first drain pan 2b is taken out and used for maintenance, the handle portion 7 is pushed backward once to release the engagement state between the locking member 10 and the bag portion 8C, and then the handle portion 7 is moved forward. Is pulled, the pivot 24 of the crank mechanism 6 is lowered to place the first drain pan 2b on the front and rear rail portion 17. Further, the first drain pan 2b is taken forward from the maintenance opening 9, and maintenance is performed. On the other hand, in the case of the second drain pan 2a, the screws are removed and the inside of the upper and lower rail portions 18A is lowered by hand, and then taken out from the maintenance opening 9 and used for maintenance.

As described above, in this indoor unit for air conditioning, since each connecting rod 16 of the guide mechanisms 3a and 3b is supported by the rod support portion 8, it can be prevented from easily slipping off. Thereby, the 1st drain pan 2b can be fixed to the direct under position B, without using a screw | thread etc. Further, the elevating mechanisms 15 a and 15 b are constituted by the handle portion 7, the crank mechanism 6, the connecting rod 16, the rod support portions 8 and 8 A, and the locking member 10, and the locking member 10 is engaged with the rod support portion 8. Since the connecting rod 16 is configured to be detachably engaged and stop the movement of the connecting rod 16 at the engagement position, the first drain pan 2b that has been attached / removed and removed / inserted from / to the maintenance opening 9 has a simple structure. Maintenance can be performed easily.

And the 1st heat exchanger 1b and the 2nd heat exchanger 1a are arrange | positioned by the substantially C shape by the side view, and the turbo fans 5 and 5 installed below the 1st drain pan 2b and the 2nd drain pan 2a are Since the fan rotation drive shaft 20 is oriented vertically and the air suction port 19 faces upward, the air path resistance can be suppressed, the heat transfer area of the heat exchangers 1b and 1a can be increased, and the turbo fan 5 It is possible to avoid an air path configuration that blocks the air suction port 19. Maintenance of the first drain pan 2b in the air conditioning indoor unit having such an excellent configuration can be easily performed from the front surface of the casing.

Embodiment 2. FIG.
In the first embodiment, the air conditioning indoor unit having the crank mechanism 6 that lifts and lowers only the first drain pan 2b on the rear side is illustrated. Next, in addition to the crank mechanism 6, the crank that also lifts and lowers the second drain pan 2a on the front side. A second embodiment having the mechanism 6A will be described with reference to FIGS.
The elevating mechanisms 15aA and 15bA having the crank mechanism 6 and the crank mechanism 6A are respectively a rear crank mechanism 6 described above, a new front crank mechanism 6A, a handle portion 7, a connecting rod 16, and a rod. The support portion 8, the rod support portion 8 </ b> A, and the locking member 10 are configured. In the front crank mechanism 6A, one end of the connecting rod 16 and the other end of the node 28 are pivotally supported by a pivot 27, and one end of the node 28 is pivoted up and down with the other end of the handle portion 7 via a pivot 29. It is pivotally supported. Since the crank mechanism 6, the handle portion 7, the connecting rod 16, the rod support portion 8, the rod support portion 8A, and the locking member 10 have already been described in detail in the first embodiment, description thereof is omitted here.

  As described above, the left and right elevating mechanisms 15aA and 15bA have not only the rear crank mechanism 6 but also the front crank mechanism 6A, so that the handle portion 7 is pushed toward the back of the main casing 12. Thus, the front and rear first drain pan 2b and second drain pan 2a can both be lifted upward and placed at the positions B and Ba, respectively.

  In each of the above embodiments, the indoor unit for air conditioning using the two heat exchangers 1a and 1b has been exemplified, but the indoor unit for air conditioning of the present invention is not limited thereto. For example, even if there is only one heat exchanger, maintenance is performed from the front side of the main body casing, and if this is an indoor unit for air conditioning in which a drain pan is arranged at the rear rear part in the main body casing, The action and effect of the invention are preferably exhibited.

1a Second heat exchanger (heat exchanger)
1b 1st heat exchanger (heat exchanger)
2a Second drain pan (drain pan)
2b First drain pan (drain pan)
3a, 3b Guide mechanism 5 Turbo fan (blower)
6, 6A Crank mechanism 7 Handle part 8, 8A Rod support part 9 Maintenance opening part 10 Locking members 11a, 11b Lower end part 12 Main body casing 12A Front face 15a, 15b, 15aA, 15bA Lift mechanism 16 Connecting rod 17 Front and rear rail part 18 18A Vertical rail 19 Air inlet 20 Fan rotation drive shaft A, Aa Standby position B, Ba Directly below position

Claims (5)

A body casing formed in a box shape;
A heat exchanger built in the main body casing such that a lower end portion is located at a rear portion in the main body casing;
A blower incorporated in the main body casing to blow indoor air to the heat exchanger;
A drain pan disposed below the lower end of the heat exchanger;
A maintenance opening formed on the front surface of the main casing;
A guide mechanism for guiding the drain pan inserted into the main body casing from the maintenance opening to a standby position located below a lower end of the heat exchanger;
An elevating mechanism for elevating and lowering the drain pan between the standby position and a position directly below the lower end of the heat exchanger;
An indoor unit for air conditioning characterized by comprising: The guide mechanism is arranged between the maintenance opening and the standby position in the main body casing, and the front and rear rail portions for guiding the drain pan back and forth,
An upper and lower rail portion that is arranged between the standby position and a position directly below the lower end portion of the heat exchanger to guide the drain pan up and down;
The indoor unit for air conditioning according to claim 1, comprising: The lifting mechanism is arranged at the front part of the main body casing and is operated to move back and forth.
A crank mechanism that is arranged below the standby position to raise and lower the drain pan at the standby position;
A connecting rod that connects the grip portion and the crank mechanism;
A rod support portion that supports the connecting rod so as to be movable back and forth; and
A locking member provided on the connecting rod, and
3. The structure according to claim 1, wherein the locking member is configured to detachably engage with the rod support portion and stop the movement of the connecting rod at the engagement position. 4. Indoor unit for air conditioning. A heat exchanger is incorporated in the main body casing separately from the first heat exchanger incorporated in the main body casing such that the lower end portion is located at the rear portion in the main body casing, and the second heat exchanger is incorporated in the main body casing. A heat exchanger,
The drain pan is a first drain pan disposed below a lower end portion of the first heat exchanger, and a second drain pan disposed below a lower end portion of the second heat exchanger. The indoor unit for air conditioning as described in any one of Claim 1- Claim 3. An air intake for taking in indoor air is formed in the upper part of the main body casing, and an air outlet for blowing out the conditioned air that has passed through the first heat exchanger and the second heat exchanger is formed in the lower part of the main body casing,
The first heat exchanger and the second heat exchanger are arranged in a substantially C shape in a side view,
The blower is installed below the first drain pan and the second drain pan,
5. The indoor unit for air conditioning according to claim 4, wherein the blower is a turbo fan, and the turbo fan is arranged with a fan rotation drive shaft in a vertical direction and an air suction port in an upward direction.

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