JP2013164186A - Indoor unit of air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of an air conditioning device, wherein even if water infiltrates from a through-hole formed in a top plate, the water hardly infiltrates in an area where an electric component or the like is installed.SOLUTION: An indoor unit 2 of an air conditioning device 1 of ceiling-suspended type or ceiling-embedded type performs air-conditioning by feeding air with its heat exchanged with a heat exchanger 10 from an air outlet 25, and includes a top plate 23 forming an upper end surface of the indoor unit 2 and provided with a through-hole 230 at a predetermined position, and a heat insulating member 60 disposed to face the top plate 23, at least on a lower side of a portion where the through-hole 230 is provided in the top plate 23, wherein the heat insulation member 60 characteristically has a water guide structure 64 capable of guiding water infiltrated from the thorough hole 230, from a position on a lower side of the through-hole 230 in a horizontal direction to a position outside than the heat exchanger 10.

Description

  The present invention relates to an indoor unit of an air conditioner that performs a vapor compression refrigeration cycle by circulating a refrigerant.

  As an indoor unit of an air conditioner (ceiling hanging type) installed in a state suspended from the ceiling, for example, one described in Patent Document 1 is known.

  Moreover, what was described in patent document 2 is known as an air conditioning apparatus (embedded ceiling type) installed in the state embedded in the ceiling, for example.

  In these indoor units, respective components such as a heat exchanger, a blower, and electrical components are arranged below the top plate that constitutes the upper end surface of the indoor unit. And an indoor unit is installed in a ceiling by a top plate being connected to the suspension member from a ceiling, or being fixed to a ceiling by a fixing member etc.

JP-A-10-103702 JP 2007-192415 A

  In the above indoor unit, a through hole may be formed in the top plate. This through-hole is used, for example, to fix the top plate when attaching a fan motor or the like to the top plate in the manufacturing process, or used for positioning when installing the indoor unit. Is not used. Therefore, in the indoor unit after installation, the through hole of the top plate remains open.

  Usually, a heat insulating member for preventing condensation on the top plate is disposed immediately below the top plate, so the through hole is blocked by the top surface of the heat insulating member. Since it is not a member for closing the through hole, the through hole is not closed in a liquid-tight state. Specifically, since the through hole is closed by arranging the heat insulating member so as to contact the top plate from the lower side of the top plate, there is a slight gap between the top plate and the heat insulating member. A gap is formed.

  For this reason, when the through hole is formed in the top plate, if water reaches the top plate from the ceiling side due to rain leakage or the like, the water passes through the gap between the top plate and the heat insulating member from the through hole. May enter the interior of the indoor unit.

  If the water that has entered the indoor unit flows into the area where the blower or the electrical unit is disposed, the motor of the blower, the electrical components in the electrical unit, etc., get wet and cause a failure.

  Therefore, in view of the above problems, the present invention provides an indoor unit of an air conditioner in which even if water enters from a through hole formed in a top plate, the water does not easily enter an area where an electrical component or the like is disposed. The task is to do.

  In order to solve the above problems, the present invention is an indoor unit (2) of a ceiling-suspended or ceiling-embedded air conditioner (1), which includes a heat exchanger (10) and the indoor unit (2). And the top plate (23) provided with a through hole at a predetermined position, and the top plate (23) at least below the portion of the top plate (23) where the through hole (230) is provided. 23) and a heat insulating member (60) disposed so as to face each other. And the said heat insulation member (60) can guide the water which permeates from the said through-hole (230) from the position below the said through-hole (230) to the position outside the said heat exchanger (10). It has a water guide structure (64).

  According to this structure, when water infiltrates from the through-hole (230) provided in the top plate (23), this water is converted into the heat exchanger (10) by the water guide structure (64) of the heat insulating member (60). ) To the outside (secondary side of the heat exchanger (10)), the water can be prevented from going to the area where the electrical components and the like in the indoor unit (2) are arranged. As a result, even if water enters from the through hole (230) provided in the top plate (23), it becomes difficult for this water to enter the area where the electrical components and the like are arranged in the indoor unit (2).

  Specifically, in the ceiling-suspended type or ceiling-embedded indoor unit (2), the temperature is adjusted outside the heat exchanger (10), that is, by the heat exchanger (10), and then the outlet (25 ), The air blower (27), the electrical unit (55), and the like are not arranged in the air path from the air flow until the air is blown out. By guiding the water that has entered through the through hole (230) to the position outside the heat exchanger (10) (secondary side of the heat exchanger (10)) by the water guide structure (64) having the indoor unit (2 ), It is possible to suitably prevent the water from going to a region (for example, the primary side of the heat exchanger (10)) where the electrical components and the like are disposed.

  For example, the water conveyance structure (64) is provided on the top surface (62) of the heat insulating member (60), and extends from a position below the through hole (230) to a position outside the heat exchanger (10). The extending water guide groove (64) may be sufficient.

  Thus, the water which infiltrated from the through-hole (230) of the top plate (23) by the simple structure of providing the groove (water guide groove) (64) on the top surface (62) of the heat insulating member (60) is an indoor unit. (2) It can prevent suitably going to the area | region where the electrical components etc. are arrange | positioned.

  Further, when the water guide structure is a groove (water guide groove) (64), the bottom surface (65) of the water guide groove (64) extends from the position below the through hole (230) of the heat exchanger (10). It is preferable to incline so as to become lower toward the outer position.

  According to such a configuration, water that has entered from the through hole (230) of the top plate (23) can be more reliably guided to the position on the side of the outlet (25), whereby the through hole ( 230), it is possible to more reliably prevent the water that has entered from 230) from heading to the area where the electrical components are arranged.

  An electrical unit (55) disposed upstream of the heat exchanger (10) in the air flow direction is provided, and the top plate (23) has a rectangular shape in plan view, and the electrical unit (55 ) And the through hole (230) may be disposed at a position along one side of the periphery of the top plate (23).

  In this case, the electrical unit (55) is disposed at a position close to the through hole (230), but even in such a case, the water that has entered from the through hole (230) remains in the heat insulating member (60). Since the water guide structure (64) is guided to a position outside the heat exchanger (10) (downstream of the heat exchanger (10) in the air flow), the inside of the heat exchanger (10) (air flow) It is possible to reliably prevent the electrical unit (55) disposed on the upstream side of the heat exchanger (10) in the flow from getting wet by the water.

  As described above, according to the present invention, it is possible to provide an indoor unit of an air conditioner in which even if water enters from a through hole formed in a top plate, the water does not easily enter an area where an electrical component or the like is disposed. Can do.

It is a schematic block diagram of the air conditioning apparatus which concerns on this embodiment. It is a perspective view of the indoor unit in the air conditioning apparatus. It is a longitudinal cross-sectional view of the indoor unit. It is a bottom view of the state which removed the lower surface decorative board and the drain pan. It is an enlarged view of the IV-IV part in FIG. It is a perspective view of the heat insulation member of the indoor unit. It is a partial enlarged view in the longitudinal cross-section of the indoor unit which concerns on other embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the indoor unit according to the present embodiment (hereinafter simply referred to as “indoor unit”) is connected to the outdoor unit 3 through pipes 4 and 4 to constitute the air conditioner 1. . The air conditioner 1 includes a refrigerant circuit, and the refrigerant circuit includes an indoor heat exchanger 10, a compressor 12, an outdoor heat exchanger 13, an expansion valve 14, and a four-way switching valve 15. It is the main component. In the air conditioner 1, the four-way switching valve 15 is switched to switch the refrigerant circulation direction in the refrigerant circuit, thereby switching between the cooling operation and the heating operation.

  The indoor unit 2 is a ceiling-suspended type (so-called ceiling-suspended type), and as shown in FIGS. And a decorative plate 22 attached to the lower part of the casing 21.

  The casing 21 has a substantially square (rectangular) top plate 23 in plan view, and a side wall 24 extending substantially downward from the periphery of the top plate 23.

  The top plate 23 is a metal plate-like member that constitutes the upper end surface (top surface) of the indoor unit 2. By connecting the top plate 23 to the suspension member that hangs down from the ceiling, the indoor unit 2 is installed on the ceiling.

  The top plate 23 has a through hole 230 at the peripheral edge thereof. Two through holes 230 are formed in the top plate of the present embodiment. Specifically, two through-holes 230 and 230 are formed substantially at the center in the horizontal direction of the peripheral portion of the top plate constituting one side of the substantially square, and face the one side across the center of the top plate 23. One is formed at the substantially horizontal center of the top plate peripheral portion constituting the side.

  The two through holes 230 and 230 of the present embodiment prevent the top plate 23 from moving when the fan motor 32 of the blower 27 described later is fixed to the center of the top plate 23 in the manufacturing process of the indoor unit 2. It is used for fixing the top plate 23.

  The side wall 24 includes a corner cover 240 that is disposed at each corner of the indoor unit 2 and a side decorative plate 242 that is disposed between the corner covers 240 and 240 and is long in the horizontal direction. An air outlet 25 is opened below the side decorative plate 242, and a wind direction plate 25 </ b> A is disposed at the air outlet 25. The wind direction plate 25A is a rectangular plate-like member that is long in the horizontal direction. A swing motor (not shown) is connected to both ends in the horizontal direction, and swings or rotates by driving the swing motor. The direction of the wind blown from the blower outlet 25 is changed by the rocking or turning. Further, the wind direction plate 25A is in an upright posture so as to close the air outlet 25 while the operation of the air conditioner 1 including the indoor unit 2 is stopped.

  The bottom decorative plate 22 is disposed so as to close the lower opening of the side wall 24. The bottom decorative plate 22 has a rectangular suction grill 26 at the center thereof.

  The indoor unit 2 includes a blower 27, a bell mouth 28, an air filter 29, an indoor heat exchanger 10, a drain pan 30, an electrical unit 55, a heat insulating member 60, and the like in the casing 21.

  The blower 27 is a centrifugal blower (turbo fan) having an impeller 31 and a fan motor 32, and is arranged so that the suction port 33 of the blower 27 faces the position corresponding to the suction grille 26 of the lower decorative plate 22. Yes. A bell mouth 28 is disposed between the suction port 33 and the suction grill 26 of the blower 27.

  The air filter 29 has a size that covers the inlet of the bell mouth 28, and is disposed along the suction grille 26 between the bell mouth 28 and the suction grille 26.

  The indoor heat exchanger 10 is a so-called cross fin type having a plurality of thin plate-like fins 34, 34,... And a plurality of heat transfer tubes 35, 35,. It is a heat exchanger. The indoor heat exchanger 10 is disposed so as to surround the centrifugal blower 27 (the impeller 31) from the horizontal direction. The indoor heat exchanger 10 exchanges heat between the refrigerant flowing through the heat transfer tubes 35 and the indoor air (outside air) blown from the centrifugal blower 27 via the tube walls and the fins 34 of the heat transfer tubes 35.

  The drain pan 30 is a member for receiving water droplets generated in the indoor heat exchanger 10 and preventing it from falling into the room. The drain pan 30 follows the indoor heat exchanger 10 on the lower side of the indoor heat exchanger 10. Has been placed.

  The electrical unit 55 accommodates various electrical components necessary for controlling the indoor unit 2. The electrical unit 55 is disposed on the inner side (primary side of the indoor heat exchanger) than the indoor heat exchanger 10 in the horizontal direction.

  The heat insulating member 60 is disposed inside the top plate 23 and the side wall 24 so as to face the top plate 23 and the side wall 24, and is formed of a lightweight and heat-insulating material such as polystyrene foam. The heat insulating member 60 is a member for preventing condensation on the outer surface (surface) of the casing 21 due to a temperature difference between the inside and the outside of the indoor unit 2.

  The heat insulating member 60 is positioned along the path from the indoor heat exchanger 10 to the air outlet 25 where the air temperature-controlled by the heat exchanger 10 is blown out of the indoor unit 2, specifically, It arrange | positions in the range from the position above the indoor side heat exchanger 10 in the top plate 23 to the blower outlet 25 of the side decorative plate 242 lower end.

  As shown in FIG. 6, the heat insulating member 60 of the present embodiment has a frame shape along the periphery of the top plate 23 in a plan view, and a shape corresponding to the side wall 24 in a side view, that is, It extends from the top plate 23 to the lower decorative plate 22 at both ends in the horizontal direction (site located inside the corner cover 240), and from the top plate 23 to the side decorative plate 242 at the central portion (site located inside the side decorative plate 242). It is the shape extended to the lower end (upper end of the blower outlet 25).

  A number of water guide grooves 64 corresponding to the number of through holes 230 provided in the top plate 23 are formed on the top surface 62 of the heat insulating member 60. Since the two through holes 230 and 230 are provided in the top plate 23 of the present embodiment, two water guide grooves 64 and 64 are formed in the top surface 62 of the heat insulating member 60. Here, the top surface 62 of the heat insulating member 60 is a top surface of the heat insulating member 60 and is a surface facing the top plate 23 from below the top plate 23.

  The heat insulating member 60 only needs to have at least as many water guide grooves 64 as the number of through holes 230 provided in the top plate 23. In this embodiment, two or more water guide grooves 64, 64,... It only has to be formed. Moreover, when the number of the through-holes 230 provided in the top plate 23 is one, the water guide groove 64 may be one.

  The water guide groove 64 guides water that has entered from the outside through the through hole 230 of the top plate 23 from a position below the through hole 230 to a position outside the indoor heat exchanger 10 (on the outlet 25 side). .

  Specifically, the water guiding groove 64 is a portion recessed downward on the top surface 62 of the heat insulating member 60, and includes a bottom surface 65 and a side wall surface 66 rising from the periphery of the bottom surface 65. The water guide groove 64 extends from the position below the through hole 230 of the top plate 23 toward the side decorative plate 242 (on the air outlet 25 side). The water guide groove 64 of the present embodiment has a constant width and extends straight, but is not limited to this, and the width may change from a position below the through hole 230 toward the side decorative plate 242. It may be curved or bent.

  The tip of the water guiding groove 64 (the end on the side decorative plate 242 side) is open without a side wall surface rising from the bottom surface 65. That is, the water that has flowed through the water guide groove 64 flows out of the water guide groove 64 from this tip. In the present embodiment, a stepped portion 62A is formed on the top surface 62 of the heat insulating member 60 at an intermediate position from the lower side of the through hole 230 to the side decorative plate 242, and the tip of the water guide groove 64 is located at the position of the stepped portion 62A. Is open. The water that flows out from the tip of the water guide groove 64 travels along the surface of the heat insulating member 60, passes between the side decorative plate 242 and the heat insulating member 60, and flows out from the air outlet 25 to the outside.

  The water guiding groove 64 may extend to the side decorative plate 242. Moreover, the cross-sectional shape of the water guide groove 64 may not be a U-shape with the upper side opened as in the present embodiment, and may be, for example, a V-shape or a U-shape.

  According to the indoor unit 2 described above, when water (water that has reached the top plate 23 from the ceiling side due to rain leakage or the like) has entered from the through hole 230 provided in the top plate 23, this water is supplied to the heat insulating member 60. Rather than accumulating on the top surface 62, the water is guided to the position outside the indoor heat exchanger 10 (secondary side of the indoor heat exchanger 10) by the water guide groove 64 of the heat insulating member 60, so that the water flows indoors. It can prevent going to the area | region (primary side of the indoor side heat exchanger 10) in which the electrical equipment etc. in the machine 2 are arrange | positioned. As a result, even if water enters from the through hole 230 formed in the top plate 23, this water enters the area (primary side of the indoor heat exchanger 10) where the electrical unit 55 and the like in the indoor unit 2 are arranged. It becomes difficult to do.

  Specifically, in the indoor unit 2, the outside of the indoor heat exchanger 10, that is, after the temperature is adjusted by the indoor heat exchanger 10, in the air path from the outlet 25 to the outlet, The blower 27, the electrical unit 55, etc. are not arranged so as not to obstruct the flow of the air blown out. For this reason, the water that has entered through the through hole 230 by the water guide groove 64 of the heat insulating member 60 is used as the outside of the indoor heat exchanger 10 (secondary of the indoor heat exchanger 10) that is an area where the electrical unit 55 or the like is not disposed. By guiding to the position (side), the water can be suitably prevented from going to the region (primary side of the indoor heat exchanger 10) where the electrical unit 55 and the like in the indoor unit 2 are arranged.

  In addition, the indoor unit of the air conditioning apparatus of this invention is not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  The water guide groove 64 of the heat insulating member 60 of the above embodiment guides water entering from the through hole 230 used in the manufacturing process of the indoor unit 2, but the through hole provided in the top plate 23 for other uses. It may be used to guide the water that has entered from. That is, the water guide groove 64 provided in the heat insulating member 60 allows the water that has entered from the through hole to flow outside the secondary heat exchanger 10 (secondary) regardless of the use or position of the through hole provided in the top plate 23. It is used to guide to the side) position.

  In the water guide groove 64 of the heat insulating member 60 of the above embodiment, the bottom surface 65 is a substantially horizontal surface, but is not limited thereto, and the bottom surface of the water guide groove is inclined so as to become lower toward the side decorative plate 242. Also good. By inclining the bottom portion (bottom surface) of the water guide groove in this way, water that has entered from the through hole 230 of the top plate 23 can be more reliably guided to a position outside the indoor heat exchanger 10, whereby the top plate It is possible to more reliably prevent water that has entered from the through-holes 230 of the 23 toward the region (primary side of the indoor heat exchanger 10) where the electrical unit 55 and the like are disposed.

  Moreover, in the indoor unit 2 of the said embodiment, the through-hole 230 is provided in the position along one edge in the periphery of the rectangular top plate 23, and the electrical equipment unit 55 is located in the position along the edge adjacent to the said edge. Although arranged, it is not limited to this arrangement. For example, the through hole 230 and the electrical unit may be disposed along one side of the top plate 23. At this time, the electrical unit may be arranged so as to straddle the one side and the side adjacent thereto. That is, at least a part of the electrical unit and the through hole 230 may be arranged along one side of the top plate 23. In this case, the electrical unit is disposed at a position close to the through hole 230, but even in such a case, the water that has entered from the through hole 230 is transferred to the indoor heat exchanger by the water guide structure 64 of the heat insulating member 60. Since it is guided to a position on the outer side (secondary side) than 10, the electrical unit 55 arranged on the inner side (primary side) than the heat exchanger 10 can be reliably prevented from getting wet by the water.

  Moreover, although the indoor unit 2 of the said embodiment is a ceiling hanging type, it may be a ceiling embedded type (so-called cassette type) indoor unit. That is, in the said embodiment, although it is the indoor unit 2 in which the blower outlet 25 was formed in the side surface, the indoor unit in which the blower outlet was formed in the bottom face may be sufficient.

  Even in a ceiling-embedded indoor unit, since a fan motor, an electrical unit, or the like is not arranged between the heat exchanger and the blowout port, the water that has entered from the through hole 230 of the top plate 23 is guided to the position. This makes it difficult for this water to enter a region (for example, the primary side of the heat exchanger) where electrical components and the like are arranged in the indoor unit.

  Moreover, in the said embodiment, although it is the indoor unit 2 which blows a wind in four directions, it is not limited to this, The indoor unit which blows a wind in two directions may be sufficient, and it is an indoor unit which blows a wind in one direction. May be.

  Moreover, the specific structure of the water guide structure provided in the heat insulation member 60 which guides the water which permeated from the through-hole 230 of the top plate 23 to the position of the blower outlet 25 side rather than the indoor side heat exchanger 10 is not limited. In the indoor unit 2 of the above embodiment, a water guide groove 64 is used as the water guide structure provided in the heat insulating member 60. For example, as shown in FIG. 7, water guide holes formed in the heat insulating member 60 are used. 64A may be used. In this case, one end of the water guide hole 64A is opened below the through hole 230 of the top plate 23, and the other end is outside the indoor heat exchanger 10 (in the example of FIG. It is opened at a position facing the plate 242. The inside of the water guide hole 64A is formed to have a downward gradient from the opening on the through hole 230 side of the top plate 23 toward the opening on the side decorative plate 242 side.

  Moreover, although the indoor unit 2 of the said embodiment is used for the air conditioning apparatus 1 which performs both air_conditionaing | cooling operation and heating operation, it may be an indoor unit used for the air conditioning apparatus only for cooling, and air for exclusive use of heating The indoor unit used for a harmony device may be sufficient.

1 Air Conditioner 2 Indoor Unit 10 Indoor Heat Exchanger (Heat Exchanger)
21 Casing 22 Lower surface decorative plate 23 Top plate 24 Side wall 25 Outlet 55 Electrical unit 60 Heat insulation member 62 Top surface 64 Water guide groove (water guide structure)
65 Bottom 230 Through-hole 242 Side decorative plate

Claims (4)

An indoor unit (2) of a ceiling suspended type or ceiling embedded type air conditioner (1),
A heat exchanger (10);
A top plate (23) that constitutes the upper end surface of the indoor unit (2) and has a through hole at a predetermined position;
A heat insulating member (60) disposed so as to face the top plate (23) at least below a portion of the top plate (23) where the through hole (230) is provided,
The heat insulating member (60) is capable of guiding water entering from the through hole (230) from a position below the through hole (230) to a position outside the heat exchanger (10). An air conditioner indoor unit having (64).   The water guide structure (64) is provided on the top surface (62) of the heat insulating member (60) and extends from a position below the through hole (230) to a position outside the heat exchanger (10). The indoor unit of an air conditioner according to claim 1, wherein the indoor unit is a groove (64).   The bottom surface (65) of the water guiding groove (64) is inclined so as to become lower from a position below the through hole (230) toward a position outside the heat exchanger (10). Air conditioner indoor unit. An electrical unit (55) disposed upstream of the heat exchanger (10) in the air flow direction;
The top plate (23) is rectangular in plan view,
The at least one part of the said electrical equipment unit (55) and the said through-hole (230) are arrange | positioned in the position along one edge | side in the periphery of the said top plate (23). The indoor unit of the air conditioning apparatus described in 1.

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