JP2018185092A - Indoor equipment of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide indoor equipment of an air conditioner which can uniformize wind speed distribution of air passing through a heat exchanger.SOLUTION: Floor type indoor equipment 1 of an air conditioner includes: an air inlet 34 provided at a lower part of a cabinet 21; a blower 32 which blows the suctioned air to the downstream side; a heat exchanger 31 which conducts heat exchange with the blown air; an air outlet 35 which blows the air that has passed through the heat exchanger 31; a front panel 22 which is disposed at the front surface side of the heat exchanger 31 and serves as an exterior cover of the cabinet 21; and a heat insulation plate 36 which is disposed between the heat exchanger 31 and the front panel 22 and insulates heat between outer air and the interior of the cabinet 21. The heat insulation plate 36 includes: a lower surface protruding part 362 protruding to the front panel 22 side at the lower surface side; and an upper surface protruding part 363 protruding to the heat exchanger 31 side at the upper surface side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an indoor unit of an air conditioner.

A floor-mounted indoor unit is known as an indoor unit of an air conditioner installed on a floor surface in a room. The floor-mounted indoor unit has a structure in which air is sucked in by a blower from a lower suction port of the casing, and after passing through a heat exchanger in the upper part of the blower, air is sent into the room from a blower outlet. In order to improve the capacity of floor-mounted indoor units, it is essential to improve the efficiency of heat exchangers. In order to make the most of the heat exchanger, it is desirable that the wind speed distribution hitting the heat exchanger is uniform.
Since the floor-mounted indoor unit is installed directly on the floor surface of the room, it is subject to restrictions on the size and design of the housing. Due to the size and design of the housing, it is difficult to secure a sufficient air flow path in the air flow path region, and the air speed distribution on the surface of the heat exchanger tends to be biased.

  Japanese Patent Application Laid-Open No. H10-227707 has a floor-standing type provided with a fluid guide wall that guides the wind flowing along the main body front vertical wall above the heat exchanger between the horizontal wind direction changing plate and the lower outlet on the main body front wall at the lower outlet. An air conditioner is described. The floor-mounted air conditioner described in Patent Literature 1 installs a rectifying plate (fluid guide wall) and induces a flow to the heat exchanger to improve the wind speed distribution.

Japanese Patent No. 3614488

  The floor-mounted indoor unit has, for example, a casing size of 600 mm width × 375 mm depth × 1750 mm height, and is a slim and tall device. Therefore, the heat exchanger in the housing is attached at an angle close to vertical. Further, the blowout port can be attached only to the upper part of the housing because of performance requirements. Therefore, at the lower part of the heat exchanger, a sufficient air flow path region cannot be secured, and the ventilation resistance increases. For these reasons, the floor-mounted indoor unit has a problem that the wind speed distribution with respect to the heat exchanger becomes non-uniform and the performance is degraded.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the indoor unit of the air conditioner which can equalize the wind speed distribution of the air which passes a heat exchanger.

  In order to solve the above-described problems, an indoor unit of an air conditioner according to the present invention includes an air suction port provided in a lower part of a housing, a blower that blows the sucked air downstream, and heats the blown air. A heat exchanger to be exchanged, an air outlet that blows out air that has passed through the heat exchanger, a front panel that is disposed on the front side of the heat exchanger and is an exterior cover of the housing, the heat exchanger, and the front A heat insulating plate that is arranged between the panel and that insulates outside air from the inside of the housing, and the heat insulating plate has a lower surface convex portion that protrudes toward the front panel on the lower surface side, and the upper surface side And an upper surface convex portion that is convex toward the heat exchanger side.

  ADVANTAGE OF THE INVENTION According to this invention, the indoor unit of the air conditioner which can equalize the wind speed distribution of the air which passes a heat exchanger is provided.

It is a figure which shows the external appearance of the floor-standing indoor unit of the air conditioner which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the floor-mounted indoor unit of the air conditioner according to the embodiment. It is sectional drawing which shows the detail of the heat insulation board vicinity of the floor-standing indoor unit of the air conditioner which concerns on the said embodiment. It is a perspective view of the heat insulation board of the floor-standing indoor unit of the air conditioner according to the embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.
FIG. 1 is a diagram illustrating an appearance of a floor-mounted indoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the floor-mounted indoor unit. In the description, “up, down”, “left, right”, “front (front), back (rear)” follow the arrows in each figure.
An air conditioner according to an embodiment of the present invention includes an outdoor unit (not shown) installed outside (non-air-conditioned space) on the heat source side, and a floor-mounted indoor unit 1 installed indoors (air-conditioned space) on the use side. (Indoor unit) and connected by a refrigerant liquid pipe and a refrigerant gas pipe.
The floor-standing indoor unit 1 is an indoor unit that is directly installed on a floor surface in a room.
As shown in FIG. 1, the floor-standing indoor unit 1 includes a cabinet 21 as a housing, a front panel 22 disposed on the front surface of the cabinet 21, and a lower base 23 installed on the bottom of the cabinet 21. Refrigerant pipe intakes 24 (see FIG. 2) are formed on the left and right side surfaces and the back surface of the lower portion of the cabinet 21. A remote controller 25 for operating the air conditioner is installed at the center of the front panel 22.

As shown in FIG. 2, a heat exchanger 31, a blower (fan motor) 32, a fan guide 33, a suction port 34, a blowout port 35, a heat insulating plate 36, a drain pan 37, an electrical component box 38, a refrigerant pipe are installed in the cabinet 21. 39, a pipe connection part 40 is provided.
The floor-mounted indoor unit 1 sucks air from the suction port 34 at the lower part of the cabinet 21, and the air is sent to the heat exchanger 31 at the upper part of the cabinet 21 through the blower 32, and the heat is exchanged by the heat exchanger 31. Is blown into the room through the outlet 35.
The blower 32 includes a centrifugal fan (not shown) that rotates in a plane parallel to the front surface of the cabinet 21, and has a fan guide 33 that rectifies the flow generated by the centrifugal fan in one direction.

The front panel 22 is attached to the front surface of the indoor heat exchanger 31 so as to cover the cabinet 21. The front panel 22 has a remote control housing portion 22a (concave portion) for embedding the remote control 25 in the center. The remote control 25 is installed by being embedded in the remote control storage portion 22a of the front panel 22 so that the front side of the front panel 22 is a flat surface. Further, the heat insulating plate 36 is attached between the front panel 22 and the indoor heat exchanger 31 in order to insulate the indoor air and the interior of the machine. The floor-mounted indoor unit 1 according to this embodiment is characterized by the configuration of the heat insulating plate 36 (details will be described later).
In the floor-mounted indoor unit 1, condensation may occur on the heat exchanger 31 during the cooling operation. In order to receive this condensed water (condensed water or condensed water), a drain pan 37 is provided immediately below the heat exchanger 31. The drain pan 37 is attached to the lower portion of the heat exchanger 31, and an electrical component box 38 is attached to the drain pan 37.

FIG. 3 is a cross-sectional view showing details of the vicinity of the heat insulating plate 36 of the floor-mounted indoor unit 1. FIG. 4 is a perspective view of the heat insulating plate 36 of the floor-standing indoor unit 1.
The heat insulating plate 36 uses a foam material such as a foam plastic heat insulating material as a material.
As shown in FIGS. 3 and 4, the heat insulating plate 36 protrudes toward the front panel 22 (the front side in FIGS. 3 and 4) on the lower surface side of the main body frame 361 and the rectangular main body frame 361. The lower surface convex part 362 and the upper surface convex part 363 which protrudes in the heat exchanger 31 side (back side of FIG. 3 and FIG. 4) in the upper surface side of the main body frame part 361 are provided.
As shown in FIG. 4, the heat insulating plate 36 is formed so that the lower surface convex portion 362 and the upper surface convex portion 363 are continuous with a smooth curved surface within the frame of the main body frame portion 361. In particular, the lower surface convex portion 362 and the upper surface convex portion 363 are formed with smooth S-shaped curves in a longitudinal cross-sectional view.

The bottom surface convex portion 362 is formed with a relief shape portion 364 that does not interfere with the remote control housing portion 22a (concave portion) of the front panel 22. As described above, the front panel 22 is formed with the remote control housing portion 22a for embedding the remote control 25 so that the front side of the front panel 22 is flat. For this reason, the back surface of the remote control housing part 22 protrudes toward the heat insulating plate 36. The lower surface convex portion 362 includes a relief shape portion 364 formed of a concave portion for avoiding interference with the remote control housing portion 22.
In the present embodiment, the relief shape portion 364 is formed on the lower surface convex portion 362. However, the relief shape portion 364 is arranged in the arrangement of the remote controller 25 embedded in the front panel 22 and the insulation plate 36. Varies depending on the relative position. For example, if the arrangement position of the remote controller 25 is above the position of FIG. 1, the relief shape portion 364 is a position over the upper surface convex portion 363. On the contrary, if the arrangement position of the remote controller 25 is below the position of FIG.

  The upper surface convex portion 363 has an upper end portion 363 a that is an upper end of the heat insulating plate 36. The upper end portion 363a has an R shape that is substantially orthogonal to the front panel 22 side, and is bent near the lower side of the outlet 35 to terminate. That is, the upper end portion 363 a constitutes the upper end of the heat insulating plate 36 and communicates with the lower vicinity of the outlet 35.

Hereinafter, the operation and effect of the floor-standing indoor unit 1 configured as described above will be described.
As shown in FIG. 2, the heat exchanger 31 of the floor-standing indoor unit 1 is installed in a tilted manner in the cabinet 2. It is known that the heat exchanger 31 has a higher heat exchange rate as the size is larger. However, since the housing size of the floor-mounted indoor unit 1 is limited, when the heat exchanger 31 as large as possible is arranged, the back surface (vertical surface) of the cabinet 21 and the surface of the heat exchanger 31 It is inevitable that the angle between the two will be an acute angle.
On the other hand, the outlet 35 can be attached only to the upper part of the cabinet 21 in terms of performance.
For this reason, as shown in FIG. 2, the distance from the heat insulating plate 36 becomes narrower toward the lower side on the secondary side (blowing side) of the heat exchanger 31. In the conventional example, the flow path region cannot be sufficiently secured in the lower part of the heat exchanger (not considering securing), and the ventilation resistance is increased. For this reason, the wind speed distribution with respect to the heat exchanger became non-uniform, and the performance deteriorated.

  On the other hand, in the floor-mounted indoor unit 1 of the present embodiment, the heat insulating plate 36 has a lower surface convex portion 362 that protrudes toward the front panel 22 on the lower surface side, and a protrusion toward the heat exchanger 31 side on the upper surface side. An upper surface protrusion 363. The lower surface convex portion 362 and the upper surface convex portion 363 are connected in a smooth S-shape when viewed in a longitudinal section.

<Operation of the lower surface convex portion 362>
2 and 3, the heat insulating plate 36 includes a lower surface convex portion 362 that protrudes toward the front panel 22, so that the secondary side of the heat exchanger 31 and the heat insulating plate 36 can be The flow path region between the lower surface convex portion 362 is enlarged. In the present embodiment, the lower surface convex portion 362 bulges from the vicinity of the lower end of the heat exchanger 31 toward the front panel 22 and continues to the upper surface convex portion 363 while maintaining the bulged shape. In this manner, a large flow path region can be secured between the secondary side of the heat exchanger 31 and the upper surface convex portion 363 at the lower part of the secondary side (blowing side) of the heat exchanger 31. By securing a large flow path area, the ventilation resistance can be greatly reduced. As a result, the wind speed distribution of the air passing through the heat exchanger 31 can be made uniform.

<Operation of S-shaped curved surface>
As shown by arrows a in FIG. 3 and FIG. 4, the wind (air) from the heat exchanger 31 in which the airflow resistance is lowered by the expansion of the flow path region and the wind speed distribution is made uniform is projected from the lower surface convex portion 362 to the upper surface convex portion. It flows along a smooth S-shaped curved surface to the upper end portion 363a of the portion 363. Since this air flows along a smooth S-shaped curved surface, it is possible to flow to the upper end portion 363a of the upper surface convex portion 363 while lowering the ventilation resistance (while increasing the wind speed).

<Operation of the convex portion 363 on the upper surface>
The heat insulating plate 36 includes the upper surface convex portion 363 that is convex toward the heat exchanger 31, so that the air flow can be rectified so as to go to the blowout port 35.
As shown by arrows b in FIGS. 3 and 4, the air that has flowed to the vicinity of the upper end portion 363 a (below the outlet 35) of the upper surface convex portion 363 is caused by the Coanda effect to the upper end of the upper surface convex portion 363. It is attracted to the wall surface of the part 363a, wraps around the lower side of the outlet 35 along the wall surface of the upper end 363a, and the flow can be rectified from the lower side of the outlet 35 to the front side of the front panel 22.

<Operation of relief shape portion 364>
The heat insulating plate 36 is provided with a relief portion 364 that does not interfere with the remote controller 25 attached to the front panel 22. In other words, as shown in FIG. 4, the shape of the lower surface convex portion 362 other than the relief shape portion 364 is widened to the front panel 22 side as much as possible. Thereby, it is possible to secure the maximum air flow area.

  As described above, the floor-mounted indoor unit 1 of the air conditioner of the present embodiment is blown by the air suction port 34 provided at the lower portion of the cabinet 21, the blower 32 that blows the sucked air downstream. A heat exchanger 31 that exchanges heat with the air, an outlet 35 that blows out air that has passed through the heat exchanger 31, a front panel 22 that is disposed on the front side of the heat exchanger 31 and that is an exterior cover of the cabinet 21, A heat insulating plate 36 that is disposed between the heat exchanger 31 and the front panel 22 and insulates the outside air from the inside of the cabinet 21, and the heat insulating plate 36 protrudes from the lower surface side to the front panel 22 side. Part 362 and an upper surface convex part 363 that is convex toward the heat exchanger 31 on the upper surface side.

  With this configuration, the air flow path region below the heat exchanger 31 can be enlarged by the lower surface convex portion 362 as shown by the broken line encircled portion A in FIGS. 2 and 3. By securing a large flow path area, the ventilation resistance can be greatly reduced. Thereby, the wind speed distribution of the air passing through the heat exchanger 31 can be made uniform.

  Further, the upper surface convex portion 363 can rectify the air flow toward the outlet 35. That is, as shown by the arrow b in FIGS. 3 and 4, the air is drawn to the wall surface of the upper end 363 a of the upper surface convex portion 363 by the Coanda effect, and is rectified from the lower side of the outlet 35 to the front side of the front panel 22. Can be shed.

  In the present embodiment, the lower surface convex portion 362 and the upper surface convex portion 363 are formed so as to be continuous with a smooth curved surface, so that air flows along a smooth S-shaped curved surface. For this reason, it is possible to flow to the upper end portion 363a of the upper surface convex portion 363 with the ventilation resistance lowered.

  As described above, the floor-standing indoor unit 1 of the air conditioner according to the present embodiment has the heat exchanger 31 of the heat exchanger 31 even when the large heat exchanger 31 is arranged in a limited housing size. You can make the most of your performance.

  Moreover, in this embodiment, the convex part is formed in the heat insulation board 36 itself originally installed in order to insulate external air and a housing. For this reason, there is no increase in new parts, and it can be applied universally at low cost.

Further, the present invention is not limited to the configuration described in the above embodiment, and the configuration can be appropriately changed without departing from the gist of the present invention described in the claims.
For example, the shape of the lower surface protrusion 362 and the upper surface protrusion 363 may be any shape. Moreover, although it is preferable that the lower surface convex part 362 and the upper surface convex part 363 are formed so that it may continue with a smooth curved surface, the surface formed by the polygon may be sufficient.

  The above-described exemplary embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. . Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each exemplary embodiment.

1 Floor-mounted indoor unit (indoor unit)
21 Cabinet
22 Front panel 23 Lower base 24 Refrigerant piping inlet 25 Remote control 31 Heat exchanger 32 Blower (fan motor)
33 Fan Guide 34 Suction Port 35 Blowout Port 36 Heat Insulation Plate 37 Drain Pan 38 Electrical Box 39 Refrigerant Piping 40 Pipe Connection Portion 361 Main Body Frame 362 Lower Surface Convex 363 Upper Surface Convex 363a Upper End of Heat Insulation Plate 364 Escape Shape

Claims (5)

An air inlet provided at the bottom of the housing;
A blower for blowing the sucked air downstream;
A heat exchanger for exchanging heat of the blown air;
A blowout port for blowing out air through the heat exchanger;
A front panel that is disposed on the front side of the heat exchanger and is an exterior cover of the housing;
A heat insulating plate that is disposed between the heat exchanger and the front panel and insulates outside air from the inside of the housing;
The heat insulating plate is
A lower surface convex portion that is convex toward the front panel on the lower surface side;
An indoor unit for an air conditioner, comprising: an upper surface convex portion that is convex on the upper surface side toward the heat exchanger side. The indoor unit of an air conditioner according to claim 1, wherein the lower surface convex portion and the upper surface convex portion are formed so as to be continuous with a smooth curved surface. The indoor unit of an air conditioner according to claim 1, wherein the lower surface convex portion and the upper surface convex portion are formed in an S shape in a longitudinal section. The indoor unit of an air conditioner according to claim 1, wherein the upper surface convex portion has an upper end portion that is curved and extends so as to be orthogonal to the lower side of the downstream air outlet. The front panel includes a recess for embedding a remote control,
The heat insulating plate is
The indoor unit of an air conditioner according to claim 1, further comprising a relief portion that prevents interference with the concave portion of the front panel.

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