JP5492626B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of a floor-standing type air conditioner, and more particularly to a structure for preventing liquid from entering an electric component box housed in an indoor unit body that is a casing.

  In general, floor-standing indoor units generally have a box shape that is relatively thin between the front and rear because of the installation space. The upper surface, the left and right side surfaces, and the front and rear surfaces are flat for design reasons that emphasize stability.

  The indoor unit of an air conditioner disclosed in [Patent Document 1] is a floor-standing type or a wall-embedded type, and is generally configured as described above. In the case of the floor-standing type, an object is easily placed on the upper surface portion of the main body casing because of being placed at a low place such as near the wall of the room.

  If the object is placed on the floor from the top surface and does not break or does not diffuse (for example, figurines / mascots), there is no problem, but liquid (for example, water / milk) has entered. It is also possible to place cups and bottles.

  If these fall down accidentally, the liquid not only diffuses to the surroundings but also flows down to the upper surface of the main casing. A part of the liquid that has flowed down may permeate into the main body casing from the joint of the panels constituting the main body casing, resulting in a problem of wetting the components housed in the main body casing.

JP 2008-256276 A

  In the indoor unit of an air conditioner described in [Patent Document 1], the configuration of the floor-standing air conditioner is generally configured such that an indoor heat exchanger is disposed on the front side inside the main body casing, and this back side. An indoor blower is arranged. On the bottom plate between the side surface portion of the indoor heat exchanger and the side surface portion of the main body casing, connection pipes and valves are arranged.

  An electrical component box is disposed in a space between the side surface portion of the indoor heat exchanger and the side surface portion of the main body casing at the upper portion of these connection pipes and valves. The upper surface portion of the electric component box is in a position close to the upper surface portion of the main body casing, and the upper surface portion of the electric component box is immediately wetted when liquid leaks from the joint of the panels constituting the main body casing.

  The electric component box itself is a box made by bending a metal (iron plate) thin plate, and has a simple structure in consideration of maintenance work and cost. If the control electrical components, PC boards, and harnesses housed in the electrical component box get wet with liquids such as water, the probability of causing a leakage accident is extremely high.

  For example, as a means for confirming the safety of a product, there is a test for checking the state of penetration into an electrical component box by pouring water on the upper surface of the main body casing and the occurrence of a leakage accident. All products ensure safety by closely combining the joints of the panels that make up the main casing and preventing liquid from entering.

  However, when the product is installed and used for a long time, gaps may occur in the panel joint due to partial distortion of the main casing or deformation of the main casing due to bumping objects. obtain. In such a case, if water leaks from the panel joint, the upper surface of the electrical component box may be wetted and may enter the interior.

  The present invention has been made based on the above circumstances, and the purpose of the present invention is to prevent the electric component box from getting wet even if liquid enters the interior of the indoor unit main body. It is an object of the present invention to provide an indoor unit of an air conditioner that can reliably prevent liquid from entering the product and ensure safety even when the product is used for a long period of time.

In order to satisfy the above object, an indoor unit of an air conditioner according to the present invention is an indoor unit main body including a rear main body on which a back plate is formed on a bottom plate and a front panel fitted on the front surface of the back plate, and an indoor heat exchanger Is attached to the rear body constituting the indoor unit body. An electrical component box that accommodates control electrical components and the like is attached to a side portion of the indoor heat exchanger. The protective cover member covers the upper surface portion of the electrical component box, and receives and guides the liquid from above that permeates and drops from the mating surface of the rear panel and the front panel of the rear body.
The protective cover member is formed along the left and right side edges and the back side edge, and is formed so as to protrude upward from the front edge and the inner edge of the peripheral edge. A protrusion, a drainage groove provided in the peripheral portion, and a missing portion provided in the back surface portion of the peripheral portion are provided.
The back plate of the rear main body is provided with a guide passage for guiding the liquid flowing down from the missing portion of the protective cover to a drain pan provided in the rear main body.

  According to the present invention, even if liquid enters the interior of the indoor unit main body, the electrical component box is prevented from getting wet, and the penetration into the electrical component box is reliably prevented to improve safety. There are effects such as

The external appearance perspective view of the indoor unit of the air conditioner based on one Embodiment in this invention. The perspective view of the state which removed the front panel which comprises the indoor unit of the air conditioner based on the embodiment. The perspective view which removed the front panel which comprises the indoor unit of the air conditioner based on the embodiment, and expanded one part. The external appearance perspective view of the protective cover member based on the embodiment, and the perspective view seen from the lower surface side. The perspective view of the state which spilled the liquid to the upper surface part of the indoor unit main body based on the embodiment. The perspective view which removed the front panel which comprises the indoor unit of the air conditioner based on other embodiment in this invention, and expanded one part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external perspective view of an indoor unit of a floor-standing type air conditioner.
The indoor unit main body 1 is composed of a rear main body 2 constituting the rear casing of the indoor unit main body 1 and a front panel 3 constituting the front casing. The rear main body 2 is formed such that the back plate 4 and the bottom plate 5 are integrally formed, the bottom plate 5 is placed on the floor surface of the air-conditioned room, and the back plate 4 is close to the wall surface of the air-conditioned room. Is done.

  The front surface of the back plate 4 constituting the rear main body 2 is opened, and the front panel 3 is fitted into the opening. Although only the part along the upper end part of the front panel 3 and the part along the lower end part are formed on the inclined surface, the front surface of the front panel 3, a part of the upper surface, and both side surfaces are flat. Also on the back plate 4 of the rear body 2, both the upper surface and the left and right side surfaces are flat. Accordingly, the indoor unit body 1 has a substantially box shape that is thin in the front-rear direction.

  An upper outlet 6 and a display part fitting opening 7 are provided side by side along a portion formed obliquely along the upper end of the front panel 3. A louver 8 is provided in the upper outlet 6, and this louver 8 is connected to a drive motor and rotates during cooling operation and heating operation to change the vertical blowing direction of cold air and hot air.

  A display unit assembly 10 including LEDs, lamps, and operation switches for displaying a set temperature, room temperature, operating conditions, and the like is fitted into the display unit fitting opening 7. The mounting structure of the display unit assembly 10 will be described later.

A lower outlet 11 is opened along an obliquely formed portion along the lower end of the front panel 3, and a plurality of vertical louvers are provided at predetermined intervals. These vertical louvers are also connected to the drive motor, and are rotated during cooling operation and heating operation, for example, to change the right and left blowing directions of cold air and hot air.
Further, a front suction port 12 is provided along the width direction at a substantially central portion of the front panel 3 in the vertical direction, and side suction ports 12a that are long in the vertical direction are provided on both side portions.

FIG. 2 is a perspective view of the interior of the indoor unit body 1 showing the components attached to the rear body 2 by removing the front panel 3 constituting the indoor unit body 1.
The air filter 13 is detachably attached to the rear body 2 so as to have substantially the same dimension as the dimension in the left-right width direction of the louver 8 fitted into the upper outlet 6 and so that the positions thereof are aligned. An indoor heat exchanger 14 is disposed on the back side of the air filter 13, and the indoor heat exchanger 14 is placed on a drain pan 14 a provided in the rear main body 2.

  A heat exchange pipe P bent in a substantially U shape protrudes from the side surface of the indoor heat exchanger 14, and the top of the heat exchange pipe P and the side of the back plate 4 (that is, the side surface of the indoor unit main body 1). Spatial space is secured between them.

  An electrical component box 15 is arranged on the upper side of the space space, and a protective cover member 16 (to be described later) and the display assembly 10 are attached to the upper surface of the electrical component box 15. Between the lower end of the electrical component box 15 and the bottom plate 5 of the rear main body 2, a space is formed in which a connection pipe and the like with a refrigerant pipe extending from the outdoor unit are accommodated.

  An indoor blower is disposed in a space formed between the back surface of the indoor heat exchanger 14 and the back plate 4. By driving the indoor blower, room air is sucked into the indoor unit main body 1 from the front suction port 12 and the side suction port 12a, and flows through the indoor heat exchanger 14 to the upper blowout port 6 and the lower blowout port 11. Will be blown out.

  FIG. 3 is an enlarged perspective view showing the right side portion of the louver 8 provided in the indoor heat exchanger 14 and the upper outlet 6 shown in FIG. 2, the electrical component box 15, the protective cover member 16 and the display unit assembly 10. It is.

  The electrical component box 15 is a rectangular box that is formed by bending a thin metal plate and is longer in the vertical direction than the width direction. The back side, not shown here, has a depth dimension close to the back plate 4. Is done. The front surface is provided with an opening, and the front lid a is attached via an attachment screw b. During maintenance, the inside can be opened by removing the attachment screw b.

  The protective cover member 16 and the display unit assembly 10 are interposed in a space between the upper surface portion of the electrical component box 15 and the upper surface portion of the back plate 4. In other words, the protective cover member 16 is mounted on the upper surface portion of the electric component box 15 and is fixedly attached to the back plate 4, and the display unit assembly 10 is fixedly attached to the front surface portion of the protective cover member 16.

  That is, the front surface portion of the protective cover member 16 is formed on an inclined surface so that the lower end portion extends to the near side, and the display assembly 10 attached to the front inclined portion 16a is inclined obliquely. The inclination angle is the same as the inclination angle of the upper end corner of the front panel 3, so that the display unit assembly 10 is fitted along the display unit fitting opening 7 of the front panel 3.

  FIG. 4A is a perspective view of the protective cover member 16, and shows the posture as it is placed on the upper surface portion of the electrical component box 15 as shown in FIG. FIG. 4B is a perspective view of the protective cover member 16 shown in FIG.

  The protective cover member 16 has a peripheral edge 16b formed along the left and right side edges and the back edge, excluding the front lower end of the front inclined portion 16a. An inner portion of the peripheral edge portion 16b is composed of a protrusion 16c and a front inclined portion 16a that are integrally formed upward and projecting in a substantially inverted U-shaped cross section, and has a substantially bowl-shaped structure as a whole.

At the boundary between the protrusion 16c and the front inclined portion 16a, the front inclined portion 16a protrudes upward and to the left and right sides from the protrusion 16c, and has a step shape. A pair of left and right mounting protrusions 17 protrude from the upper surface of the protrusion 16c and close to the back surface, and a semicircular cutout is provided at the upper end of each of the mounting protrusions 17.
The front inclined portion 16 a is provided with a rectangular hole 18, which is used for insertion of harnesses connected to the display assembly 10.

  The peripheral edge portion 16b is gradually inclined downward from the front end portion to the back side, and the back side is the lowest. From the boundary between the lower ends of the left and right side portions of the front inclined portion 16a and the protruding portion 16c, one piece is integrally formed along the edge extending from the both side portions and the rear surface, and has a drainage groove 16d having a bowl shape. As shown only in FIG. 4B, the peripheral edge portion 16b is omitted only at the corner portion on the back side, and a missing portion 16e is formed.

  Because of such a protective cover member 16, when the liquid is applied to the upper surface of the protrusion 16c, the liquid flows down from both sides to the drain groove 16d, and is guided to the back side along this inclination, from the missing portion 16e. Configured to flow down.

  On the lower surface side of the peripheral edge portion 16b, the two leg portions 16f are integrally protruded at only one side portion at a predetermined interval. These leg portions 16 f are directly mounted on the upper surface portion of the electrical component box 15 with the protective cover member 16 attached to the upper surface portion of the electrical component box 15.

  As shown in FIG. 3 again, the protective cover member 16 placed on the upper surface portion of the electric component box 15 has a front inclined portion 16a protruding forward from the front portion of the electric component box 15, and the display unit assembly 10 is here. Mounted. Part of the peripheral edge portion 16 b and the leg portion 16 f of the protective cover member 16 protrudes laterally from the side surface portion of the electrical component box 15.

  Although not particularly illustrated, the side portion of the protective cover member 16 that faces the side portion on which the leg portion 16 f is provided is placed on a shelf provided on the rear main body back plate 4. Further, the back surface portion of the protective cover member 16 also protrudes from the back surface portion of the electrical component box 15 to the back surface side, and is placed on a shelf provided on the back plate 4.

  When the protective cover member 16 and the electrical component box 15 are viewed from above the indoor unit main body 1, the electrical component box 15 enters the area of the projection surface of the protective cover member 16, and the upper surface portion of the electrical component box 15 is the protective cover member 16. Completely covered by. The rear surface 4 of the rear body 2 and the front panel 3 are assembled such that the mating surface is located above the protrusion 16c of the protective cover member 16.

  The indoor unit of the air conditioner configured as described above is instructed to perform an air conditioning operation by instructing a cooling operation or a heating operation and turning on an operation start button. The indoor air sucked into the indoor unit body 1 from the front suction port 12 and the side suction port 12a flows through the indoor heat exchanger 14 to exchange heat.

  The room air changes into cold air or warm air, and is blown out from the upper air outlet 6 and the lower air outlet 11. The louver 8 provided in the upper outlet 6 is in an inclined posture so that cool air is blown obliquely upward during cooling operation, and is in a horizontal posture so that warm air is blown forward during heating operation. The vertical louver provided in the lower outlet 11 is driven to rotate left and right during any operation, and blown out so that cold air or warm air diffuses widely in the room.

  Note that the upper outlet 6 and the lower outlet 11 are not always opened at the time of cooling operation or heating operation, but only one of them is opened due to a temperature difference between the room and the set temperature or by arbitrary setting. Also, an operation mode in which only the upper or lower blowing operation is performed by closing the other is provided.

Since the upper surface portion of the air conditioner body 1 is flat, an object may be placed on the upper surface portion regardless of the air conditioning operation or when the operation is stopped. For example, a temporarily placed object is a cup containing a liquid, and the cup is accidentally overturned, so that the liquid may flow down to the upper surface of the air conditioner main body 1. .
FIG. 5 is a diagram schematically illustrating a state in which liquid has been spilled on the upper surface of the indoor unit body 1.
The indoor unit main body 1 is configured by fitting the back plate 4 and the front panel 3 of the rear main unit 2 as described above, and the liquid W that has spilled on the top surface of the indoor unit main body 1 is separated from the back plate 4 and the front panel. 3 penetrates into the mating part. Then, the liquid W is dripped from these fitting portions to wet the indoor heat exchanger 14 and the protective cover member 16.

  If the air conditioning operation is being performed, the liquid W dropped on the indoor heat exchanger 14 is blown off by the air blown from the indoor blower and immediately dried. Even when the operation is stopped, the indoor heat exchanger 14 is an assembly of fins (metal plates) and heat exchange pipes (copper pipes) P, so that the liquid W is naturally dried or received in the drain pan 14a. Therefore, there is almost no influence on the indoor heat exchanger 14.

  Further, the liquid dripped onto the protective cover member 16 wets the upper surface portion and the side surface portion of the protrusion 16c in the assembly configuration. All the liquid is received in the drainage groove 16d, flows along the slope toward the back side, and is guided and discharged from the back side to the above-described missing portion 16e.

  The back plate 4 of the rear main body 2 is provided with a guide passage for guiding the liquid W flowing down from the missing portion 16e of the protective cover member 16 to the drain pan 14a. Therefore, the liquid W flowing down from the missing portion 16e of the protective cover member 16 is drained to the drain pan 14a together with the drain water generated and flowed down by the indoor heat exchanger 14 without diffusing to the peripheral portion of the indoor unit body 1.

  Since the electrical component box 15 is within the projection plane of the protective cover member 16 in plan view, the liquid W dripped onto the protective cover member 16 does not wet the electrical component box 15. That is, since the protective cover member 16 is provided, even if the liquid W enters and drops from the upper surface of the indoor unit body 1, it does not enter the electric component box 15, and a leakage accident occurs in the stored electric components. Is surely prevented.

  In the above-described embodiment, the display panel fitting opening 7 is provided in the front panel 3 and the display assembly 10 is fitted. The display unit assembly 10 is attached to the front inclined portion 16a of the protective cover member 16, and the protective cover member 16 forms a waterproof structure for the electrical component box 15 and also serves as a mounting base for the display unit assembly 10. .

  Conventionally, display unit components such as LEDs, lamps, and operation switches are directly attached and fixed to the upper surface of the electrical component box. Since each component is relatively small and has a large number of components, it is difficult to accurately position each component. For this reason, in a state in which the front panel is fitted, the positional deviation of the components may occur with respect to the opening provided here.

  In the above-described configuration of the present invention, the display unit assembly 10 is attached and fixed to the protective cover member 16 and is fitted into the display unit fitting opening 7 of the front panel 3. Therefore, it is possible to eliminate problems such as light leakage of the LED due to the positional deviation of the component parts as in the conventional case, to prevent positional deviation and to improve the operability of the main body operation unit.

FIG. 6 is a perspective view showing a related structure between the electrical component box 15 and the protective cover member 16 in the second embodiment.
As described above, the protective cover member 16 has a substantially bowl-shaped structure in which only the peripheral edge portion 16b is placed on the upper surface portion of the electrical component box 15, and the protrusion 16c and the front inclined portion 16a at the inner portion of the peripheral edge portion 16b protrude upward. I am doing. Therefore, when the protective cover member 16 is placed on the electric component box 15, a space is formed in the protrusion 16c and the front inclined portion 16a. Therefore, at least the protrusion 16c of the protective cover member 16 and the upper surface of the electric component box 15 are formed. Necessary additional parts H can be arranged in the space between the parts. Actually, the necessary additional component H is placed and fixed on the upper surface portion of the electrical component box 15, and the necessary additional component H is covered with the protrusion 16 c of the protective cover member 16.

  For example, an air conditioner used for home use is composed of one outdoor unit and one indoor unit, but for business use, a plurality of indoor units are connected to a large capacity outdoor unit. Is done. In order to divert an indoor unit used for home use as it is for business use, each indoor unit must be provided with necessary additional parts H such as electric parts, terminal blocks, and wiring.

  In order to reduce the size, the outer dimensions of the indoor unit main body 1 are cut down to the limit, and it is difficult to secure a space for attaching the necessary additional component H therein. Therefore, as described above, the protective cover member 16 has a substantially bowl-shaped structure, and the necessary additional component H is attached to the space that is inevitably formed between the upper surface portion of the electrical component box 15 to solve the problem. Can be planned.

Claims (3)

It consists of a rear main body on which a back plate is formed on the bottom plate, and a front panel fitted on the front surface of the rear plate of the main body after this, and an indoor unit main body placed on the installation surface,
An indoor heat exchanger attached to the rear body,
An electrical component box that is attached to a side portion of the indoor heat exchanger and accommodates electrical components for control and the like inside,
A protective cover member that covers the upper surface portion of the electrical component box and receives and guides the liquid dropped from above ;
The protective cover member is formed along the left and right side edges and the back side edge, and is formed so as to protrude upward from a peripheral edge that gradually inclines downward from the front end toward the back, and an inner portion of the peripheral edge. And a drainage groove provided in the peripheral edge, and a missing part provided in the back surface of the peripheral edge,
An indoor unit of an air conditioner, comprising: a guide passage for guiding a liquid flowing down from the missing portion of the protective cover to a drain pan provided in the rear main body on a back plate of the rear main body. . The front panel is provided with a suction opening and a blowout opening, and is provided with an opening for fitting a display section for displaying set temperature, room temperature, operating conditions,
The indoor unit of an air conditioner according to claim 1, wherein the protective cover member also serves as a mounting and fixing base for a display unit fitted in the fitting opening. The protective cover member, only the peripheral portion is placed on the upper surface of the electric component box, without the Ryakuwan type structure space space is formed between the projection and the upper surface of the electric component box,
The interior of the air conditioner according to claim 1 or 2 , wherein a necessary additional component can be arranged in a space between the protrusion of the protective cover member and the upper surface of the electric component box. Machine.

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