JP2010281461A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely recover water condensed on the outer face of a closing valve clamping plate to the inside of a casing without wetting the outer face of the casing of an outdoor unit. <P>SOLUTION: In the outdoor unit 1 for an air conditioner, a compressor 20, a heat exchanger 21 and an air fan 22 are stored within the casing 10. The closing valve clamping plate 24 for supporting a closing valve 23 is mounted to the bottom plate 14 of the casing 10. A rising wall 14a is formed on the periphery of the bottom plate 14, and the closing valve clamping plate 24 is pressed against the rising wall 14a from inside of the casing 10 and is fixed. A water introducing passage 28 is formed between the inner face of the rising wall 14a and the outer face of the closing valve clamping plate 24. Water condensed on the outer face of the closing valve clamping plate 24 is guided to the inside of the rising wall 14a through the water introducing passage 28. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

  A separate type air conditioner is used by connecting an outdoor unit and an indoor unit with refrigerant piping, and prevents leakage of refrigerant in the outdoor unit when refrigerant piping is not connected to the indoor unit. A shut-off valve is provided. The shut-off valve is arranged close to the outer surface of the outdoor unit housing so that it can be easily opened and closed during installation and maintenance of the air conditioner. In a normal design, a closing valve fixing plate for fixing a closing valve is pressed against the rising wall formed around the bottom plate of the housing from the inside of the housing. Examples of the outdoor unit of the separate type air conditioner configured as described above can be seen in Patent Documents 1 and 2.

  In the outdoor unit described in Patent Document 1, the lower end portion of the shut-off valve mounting plate is fitted into the fitting recess formed in the bottom plate, whereby the shut-off valve mounting plate is in an upright state. A pair of ridges having a semicircular cross section are provided on the inner surface of the fitting recess. The closing valve mounting plate is provided with a recess into which the protruding portion is fitted. When the protruding portion is fitted in the recess, the closing valve mounting plate is positioned in the front-rear direction of the bottom plate, and the closing valve mounting plate can be erected in a stable state.

  In the outdoor unit described in Patent Document 2, the lower part of the closing valve mounting plate is coupled to the bottom plate that forms the bottom of the housing, and the front portion of the closing valve mounting plate is coupled to the front plate that forms the front surface of the housing. The closing valve mounting plate is fixed so as not to fall down.

JP 2005-55127 A JP 2007-127312 A

  The shut-off valve is opened after the outdoor unit and the indoor unit are connected by the refrigerant pipe, and cold liquid refrigerant flows through the valve during cooling. Thereby, the temperature of the closing valve fixing plate is lowered. When the surface temperature of the closing valve fixing plate falls below the dew point temperature, moisture in the air condenses on the surface of the closing valve fixing plate. Even if the surface of the same shut-off valve fixing plate is condensed on the surface facing the inside of the outdoor unit housing, even if water droplets fall down, they are received by the bottom plate of the housing, and together with the drain water of the heat exchanger There is no problem because it is drained. However, when condensation forms on the outer surface of the housing, the water droplets wet the outer surface of the housing. When the outdoor unit is placed at a high position, water droplets may fall from overhead, and when the outdoor unit is placed on the veranda, the veranda may get wet. Neither the outdoor unit described in Patent Document 1 nor the device described in Patent Document 2 is effective in this respect.

  The present invention has been made in view of the above problems, and provides an outdoor unit for an air conditioner that can reliably collect water condensed on the outer surface of a closing valve fixing plate in the casing without wetting the outer surface of the casing of the outdoor unit. The purpose is to provide.

  In order to achieve the above object, the present invention provides an outdoor unit for an air conditioner in which a closing valve fixing plate is pressed against and fixed to a rising wall formed on a peripheral edge of a bottom plate of the casing from the inside of the casing. Between the inner surface of the wall and the outer surface of the closing valve fixing plate, a water conduit for guiding water condensed on the outer surface of the closing valve fixing plate to the inside of the rising wall is formed.

  According to this configuration, water condensed on the outer surface of the closing valve fixing plate is taken into the water conduit without getting wet on the outer surface of the casing of the outdoor unit, and is collected in the casing.

  In the outdoor unit of the air conditioner having the above-described configuration, an inclined guide plate is formed at the upper end of the rising wall, facing the overhang portion formed on the outer surface of the closing valve fixing plate with a space therebetween and connected to the water conduit. It is preferable to do.

  According to this configuration, even if there is a water drop dripping from the overhang portion of the closing valve fixing plate, it is received by the inclined guide plate and guided to the water guide passage, so that water does not leak out of the casing.

  According to the present invention, the water condensed on the outer surface of the closing valve fixing plate can be reliably collected in the housing without wetting the outer surface of the outdoor unit, so the condensed water falls from the overhead or wets the veranda. The situation can be avoided.

It is a perspective view of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a partial expanded sectional view of the indoor unit of FIG. It is a partial enlarged front view of a closing valve cover. FIG. 3 is a partially enlarged cross-sectional view similar to FIG. 2 and shows a modified embodiment.

  FIG. 1 shows an outdoor unit 1 of a separate air conditioner composed of an outdoor unit and an indoor unit. The outdoor unit 1 is shown in a state in which the front panel 11 is removed from the housing 10 so that the inside can be seen. Components of the housing 10 other than the front panel 11 are a side panel 12, a top plate 13, and a bottom plate 14. The front panel 11, the side panel 12, the top plate 13, and the bottom plate 14 are all composed mainly of press-formed steel plates. A rising wall 14a is formed at the periphery of the bottom plate 14, and the bottom plate 14 thus has a tray-like shape as a whole.

  Inside the housing 10, a compressor 20, a heat exchanger 21, and a blower fan 22 are arranged. The compressor 20 serves as a power source for generating a refrigerant flow. The heat exchanger 21 performs heat exchange between the refrigerant flowing inside and the air flow formed by the blower fan 22. The blower fan 22 is a propeller fan, and the front panel 11 has a lattice-shaped exhaust port 15 formed at a position facing the blower fan 22, and the side panel 12 sandwiches the heat exchanger 21 between the blower fan 22. An intake port (not shown) is formed at a position facing the.

  The closing valve 23 is supported by a closing valve fixing plate 24 fixed to the bottom plate 14. The side panel 12 is formed with a notch 12a at a position located on the right side when the casing 10 is viewed from the front, and the closing valve fixing plate 24 faces the outside from the notch 12a. The notch 12a is covered with a valve cover 25 made of synthetic resin. In the internal space of the housing 10, a portion that houses the compressor 20 is a compressor chamber 27 that is partitioned from other portions by a partition wall 26.

  The shut-off valve fixing plate 24 is formed by press-molding a steel plate, pressed against the rising wall 14a of the bottom plate 14 from the inside of the housing 10, and fixed to the bottom plate 14 by means such as spot welding or screwing. A frustoconical protrusion 24a (see FIG. 2) that hits the inner surface of the rising wall 14a (the surface facing the inside of the housing 10) is formed on the closing valve fixing plate 24 by drawing. A plurality of protrusions 24 a are provided in a line in the depth direction of the housing 10.

  Due to the presence of the protrusion 24a, a gap is generated between the inner surface of the rising wall 14a and the outer surface of the closing valve fixing plate 24 (the surface facing the outside of the housing 10). This gap becomes the water guide path 28.

  A water receiving groove 25a is formed in the lower portion of the valve cover 25 (see FIGS. 2 and 3). A flange 25b protrudes from the water receiving groove 25a. The flange 25b protrudes to the inside of the housing 10 through the through hole 14b formed in the rising wall 14a and the through hole 24b formed in the closing valve fixing plate 24. A rib 25c is formed on one side of the water receiving groove 25a to be a contact with the closing valve fixing plate 24.

  When the outdoor unit 1 is in a cooling operation, a cold liquid refrigerant flows through the closing valve 23. Thereby, the temperature of the closing valve fixing plate 24 is lowered. When the surface temperature of the closing valve fixing plate 24 falls below the dew point temperature, moisture in the air condenses on the surface of the closing valve fixing plate 24. Condensation begins with fine water droplets that eventually gather into large water droplets. When a water droplet becomes large to some extent, it is transferred down the surface of the closing valve fixing plate 24 by gravity.

  Condensed water droplets adhering to the inner surface of the shut-off valve fixing plate 24 (the surface facing the inside of the housing 10) flow onto the bottom plate 14. If the water conduit 28 does not exist, the condensed water droplets adhering to the outer surface of the closing valve fixing plate 24 will flow down the outer surface of the rising wall 14a. If the valve cover 25 is in close contact with the outer surface of the housing 10 without any gap, the water that travels down the outer surface of the rising wall 14a enters the water receiving groove 25a and flows into the housing 10 through the gutter 25b. A gap may be formed between the valve cover 25 and the outer surface of the housing 10 due to the shape of the valve cover 25 and variations in mounting. In such a case, condensed water leaks from the gap.

  However, in the present invention, since the water conduit 28 is formed between the inner surface of the rising wall 14a and the outer surface of the closing valve fixing plate 24, the dew condensation water that flows down the outer surface of the closing valve fixing plate 24 is the outer surface of the rising wall 14a. The water is taken into the water guide path 28 without being wetted, guided to the inside of the rising wall 14a, and collected in the housing 10. Therefore, the condensed water adhering to the closing valve fixing plate 24 does not drip from above or wet the outside of the outdoor unit 1.

  A hole is formed in the closing valve fixing plate 24 or a gap serving as an outlet of the guiding passage 24 is formed between the closing valve fixing plate 24 and the bottom plate 14 so that the condensed water taken into the water guiding passage 28 flows smoothly into the compressor chamber 27. It is good to secure a large amount. Since these holes and gaps also function as ventilation openings for the compressor chamber 27, the air flow inside and outside the compressor chamber 27 is improved. Thereby, the temperature rise of the compressor chamber 27 can be reduced.

  In the present embodiment, the protrusion 24a that hits the inner surface of the rising wall 14a is formed on the outer surface of the closing valve fixing plate 24 to secure the water conduit 28. However, even if the protruding portion is not provided, the closing valve fixing plate 24 is simply provided. The water conduit 28 can be secured simply by shifting and fixing to the compressor 20 side. Since the closing valve 23 is further retracted into the housing 10, the outdoor unit 1 can be made compact. Since the valve cover 25 is small and can be made in time, the resin material for molding the valve cover 25 can be saved.

  The valve cover 25 also has a function of receiving water. The water received on the inner surface of the valve cover 25 flows out from the water receiving groove 25a to the inside of the housing 10 through the flange 25b.

  The water that has fallen from the closing plate fixing plate 24 and the water that has been received by the valve cover 25 and placed in the housing 10 is combined with the drain water generated in the heat exchanger 21 and formed on the bottom plate 14. The water is drained through a drain hose from a drain port (not shown).

  FIG. 4 shows a modified embodiment. In FIG. 4, the illustration of the valve cover 25 is omitted.

  The shut-off valve fixing plate 24 formed in a predetermined uneven shape by press molding has an overhang portion 24c on the outer surface. On the upper end of the rising wall 14a, an inclined guide plate 14c that is opposed to the overhang portion 24c with an interval is integrally formed. The inclined guide plate 14 c is connected to the water conduit 28.

  Due to the presence of the inclined guide plate 14 c, even if there is a water drop dripping from the overhang portion 24 c, it is received by the inclined guide plate 14 c and guided to the water guide path 28, so that water leaks out of the housing 10. There is nothing.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention is widely applicable to an outdoor unit of an air conditioner that fixes a closing valve fixing plate to a bottom plate of a housing.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 10 Housing | casing 11 Front panel 12 Side panel 13 Top plate 14 Bottom plate 14a Standing wall 20 Compressor 21 Heat exchanger 22 Blower fan 23 Closing valve 24 Closing valve fixing plate 24c Overhang part 25 Valve cover 28 Water conduit

Claims (2)

In the outdoor unit of the air conditioner that presses and fixes the closing valve fixing plate from the inside of the casing to the rising wall formed at the peripheral edge of the bottom plate of the casing,
An air conditioner characterized in that a water conduit is formed between the inner surface of the rising wall and the outer surface of the closing valve fixing plate to guide water condensed on the outer surface of the closing valve fixing plate to the inner side of the rising wall. Outdoor unit.   2. An inclined guide plate is formed at an upper end of the rising wall, facing an overhang portion formed on an outer surface of the closing valve fixing plate with a space therebetween and connected to the water conduit. The outdoor unit of the air conditioner described in 1.

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