JP2013164249A - Outdoor unit of refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of a refrigerating device having a bottom frame unsusceptible to effect of vibration.SOLUTION: An outdoor unit 20 of an air conditioning device includes a heat exchanger and a casing. The casing includes a bottom frame 60 formed with a first intensity rib 64 and a drainage channel part 61 having at least a part positioned below the heat exchanger. The first intensity rib is formed in a part other than the drainage channel part, and includes a right-and-left extended rib 64a extending in the right-and-left direction and a front-and-back extended rib 64b extended in the front-and-back direction when the bottom frame is viewed from the above.

Description

  The present invention relates to an outdoor unit of a refrigeration apparatus characterized by a bottom frame.

  On the bottom frame of the outdoor unit of the refrigeration apparatus, for example, as in Patent Document 1 (Japanese Patent Laid-Open No. 2002-27704), a convex portion and a concave portion are formed for the purpose of maintaining strength against a heavy object such as a compressor. There is something to be done.

  However, the stress generated in the bottom frame is not limited to the stress due to the load of a heavy object, and stress due to the vibration of the compressor is also generated.

  In the stress caused by the vibration of the compressor, the direction of the bending moment that acts depends on the vibration mode (vibration shape) of the bottom frame, so the direction in which the stress is generated also varies depending on the vibration mode. In an outdoor unit such as Patent Literature 1, depending on the vibration mode, when the outdoor unit is viewed from the front, a bending moment may act in the left-right direction or a bending moment may act in the front-rear direction.

  However, the bottom frame of Patent Document 1 is not reinforced with respect to a bending moment acting on the bottom frame, particularly a bending moment acting in the front-rear direction. Therefore, especially when the casing including the bottom frame is made thinner for the purpose of weight reduction, the rigidity of the bottom frame is reduced and vibrations are generated in the bottom frame, which may cause noise and vibration. The inventor has found that this is the case.

  An object of the present invention is to provide an outdoor unit having a bottom frame that is not easily affected by vibration in an outdoor unit of a refrigeration apparatus.

  An outdoor unit of a refrigeration apparatus according to a first aspect of the present invention is an outdoor unit of a refrigeration apparatus, and includes a heat exchanger and a casing. The casing includes a bottom frame in which a first strength rib and a drainage channel portion at least partially located below the heat exchanger are formed. The first strength rib is formed other than the drainage channel portion, and includes a first portion extending in the left-right direction and a second portion extending in the front-rear direction when the bottom frame is viewed from above. Here, the front-rear direction is a direction from the front side to the rear side of the outdoor unit, and the left-right direction is the left-right direction of the outdoor unit, which is a direction orthogonal to the front-rear direction.

  Here, a strength rib having a first portion extending in the left-right direction and a second portion extending in the front-rear direction is provided on the bottom frame, so that a moment for bending the bottom frame in the left-right direction or the front-rear direction is reduced. The rigidity can be increased. That is, the bottom frame is unlikely to vibrate due to the bending moment acting on the bottom frame.

  In addition, since the strength rib is provided by combining the first portion extending in the left-right direction and the second portion extending in the front-rear direction, the bending moment acting in the oblique direction (the intermediate direction between the left-right direction and the front-rear direction) However, the rigidity of the bottom frame can be increased.

  The outdoor unit of the refrigeration apparatus according to the second aspect of the present invention is the outdoor unit according to the first aspect, and the bottom frame further includes a step portion formed at an edge of the drainage channel portion and a plateau portion. Have. The plateau portion is disposed above the drainage channel portion and is formed to be separated from the drainage channel portion by a stepped portion. The first strength rib is formed on the plateau. The step portion has five or more front and rear step portions extending in the left-right direction and extending in the front-rear direction.

  Thereby, the rigidity of the bottom frame can be further increased.

  The outdoor unit of the refrigeration apparatus according to the third aspect of the present invention is the outdoor unit according to the second aspect, and the first strength rib has at least one corner portion where the first portion and the second portion intersect. Have. The step portion includes a left and right step portion extending in the left and right direction, and a step corner portion where the front and rear step portion and the left and right step portion intersect. In plan view, the step corner is located in a space formed on the side of the corner facing the first and second portions.

  Thereby, it is possible to further increase the rigidity of the bottom frame in the plateau.

  The outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention is the outdoor unit according to any one of the first to third aspects, and a plurality of drain holes are formed in the drain passage.

  Here, even when a plurality of drainage holes are provided in the drainage channel portion to enhance drainage, the bottom frame is reinforced, so that sufficient rigidity can be secured.

  The outdoor unit of the refrigeration apparatus according to the fifth aspect of the present invention is the outdoor unit according to any one of the first to fourth aspects, and the inside of the casing is divided into a fan room and a machine room. The first strength rib is formed in the blower chamber.

  Thereby, the rigidity of a bottom frame can be improved in a fan room.

  An outdoor unit of a refrigeration apparatus according to a sixth aspect of the present invention is the outdoor unit according to any one of the first to fifth aspects, and a second strength rib is further formed on the bottom frame. The drainage channel portion has a left and right extending drainage channel portion that extends in the left-right direction and is positioned below the heat exchanger. The second strength rib is located on the opposite side of the first strength rib from the left and right extending drainage channel portion and extends in the left-right direction.

  Thereby, the rigidity with respect to the bending moment of the left-right direction of a bottom frame can further be improved.

  In the outdoor unit of the refrigeration apparatus according to the first aspect of the present invention, the bottom frame is provided with a strength rib having a first portion extending in the left-right direction and a second portion extending in the front-rear direction. The rigidity can be increased with respect to the moment to bend in the direction or the front-rear direction. That is, the bottom frame is less likely to vibrate due to the acting bending moment. In addition, since the strength rib is provided by combining the first portion extending in the left-right direction and the second portion extending in the front-rear direction, the bending moment acting in the oblique direction (the intermediate direction between the left-right direction and the front-rear direction) However, the rigidity of the bottom frame can be increased.

  In the outdoor unit of the refrigeration apparatus according to the second and third aspects of the present invention, the rigidity of the bottom frame can be further increased.

  In the outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention, the rigidity of the bottom frame can be ensured even when drainage holes are formed in the drainage section to enhance the drainage performance of the bottom frame.

  In the outdoor unit of the refrigeration apparatus according to the fifth aspect of the present invention, the rigidity of the bottom frame in the blower chamber can be increased.

  In the outdoor unit of the refrigeration apparatus according to the sixth aspect of the present invention, the rigidity of the bottom frame in the left-right direction can be increased.

1 is a schematic refrigerant circuit diagram of an air conditioner in which an outdoor unit of a refrigeration apparatus according to an embodiment of the present invention is employed. It is a schematic perspective view of the outdoor unit of the freezing apparatus which concerns on one Embodiment of this invention. It is a schematic top view in the state where the top plate of the outdoor unit of the refrigeration apparatus concerning one embodiment of the present invention was removed. It is a schematic plan view of the bottom frame of the outdoor unit of the freezing apparatus which concerns on one Embodiment of this invention. Some symbols are omitted for the same parts. It is a schematic sectional drawing of the bottom frame in the VV line of FIG. Some symbols are omitted for the same parts. It is a schematic sectional drawing of the bottom frame in the VI-VI line of FIG. It is a schematic sectional drawing of the bottom frame in the VII-VII line of FIG. It is a schematic sectional drawing of the bottom frame in the VIII-VIII line of FIG. It is the schematic of the vibration shape of the primary vibration mode of the left-right direction of the bottom frame of an outdoor unit. It is an example of the vibration shape of the primary vibration mode of the front-back direction of the bottom frame of an outdoor unit. It is another example of the vibration shape of the secondary vibration mode of the left-right direction of the bottom frame of an outdoor unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The outdoor unit of the refrigeration apparatus of this embodiment is used as an outdoor unit of an air conditioner.

(1) Overview of Air Conditioner (1-1) Overall Configuration The air conditioner 1 is a so-called separate type air conditioner, and as shown in FIG. 1, an outdoor unit 20, an indoor unit 40, and an outdoor unit. 20 and a liquid refrigerant communication pipe 71 and a gas refrigerant communication pipe 72 for connecting the indoor unit 40 to the indoor unit 40.

(1-2) Indoor unit The indoor unit 40 is installed in the room which is the object of air conditioning. The indoor unit 40 mainly includes an indoor heat exchanger 41 and an indoor fan 42.

  The indoor heat exchanger 41 is a cross-fin type fin-and-tube heat exchanger composed of heat transfer tubes and a large number of heat transfer fins. During cooling operation, it functions as a refrigerant evaporator to cool indoor air, and during heating operation, it functions as a refrigerant condenser to heat indoor air. The liquid side of the indoor heat exchanger 41 is connected to the liquid refrigerant communication pipe 71, and the gas side of the indoor heat exchanger 41 is connected to the gas refrigerant communication pipe 72.

  The indoor fan 42 is rotated by a motor (not shown), takes in indoor air, blows it to the indoor heat exchanger 41, and promotes heat exchange between the indoor heat exchanger 41 and the indoor air.

(1-3) Outdoor Unit FIG. 2 shows a schematic perspective view of the outdoor unit 20. The outdoor unit 20 is installed outdoors. The outdoor unit 20 mainly includes an accumulator 21, a compressor 23, a four-way switching valve 24, an outdoor heat exchanger 25, an expansion valve 26, and an outdoor fan 35 in a casing 50.

  As shown in FIG. 3, an air outlet 51 a for air blown from the outdoor fan 35 is formed in the front plate 51 of the casing 50 disposed on the outlet side of the outdoor fan 35. A fan grill 90 that covers the entire outlet 51a is attached to the outside of the casing 50 of the outlet 51a.

(2) Detailed description of outdoor unit In the following description, expressions indicating directions such as “up”, “down”, “left”, “right”, “front”, “rear”, “front”, “back”, etc. However, unless otherwise specified, the front plate 51 on which the fan grill 90 is disposed is the front of the outdoor unit 20, and the direction when viewed from the front side is shown.

(2-1) Connection by Refrigerant Pipe The suction port of the compressor 23 and the four-way switching valve 24 are connected by a suction pipe 81. The suction pipe 81 is provided with an accumulator 21 between the suction port of the compressor 23 and the four-way switching valve 24. The discharge port of the compressor 23 and the four-way switching valve 24 are connected by a discharge pipe 82. The four-way switching valve 24 and the gas side of the outdoor heat exchanger 25 are connected by a first gas refrigerant pipe 83. The outdoor heat exchanger 25 and the liquid refrigerant communication pipe 71 are connected by a liquid refrigerant pipe 84. The liquid refrigerant pipe 84 is provided with the expansion valve 26. The four-way switching valve 24 and the gas refrigerant communication pipe 72 are connected by a second gas refrigerant pipe 85.

(2-2) Compressor The compressor 23 sucks in the gas refrigerant and compresses the gas refrigerant. The compressor 23 is a positive displacement compressor. The compressor 23 is installed in a compressor installation section 68 of the bottom frame 60 described later.

(2-3) Four-way switching valve The four-way switching valve 24 switches the flow direction of the refrigerant when the air-conditioning apparatus 1 is switched between the cooling operation and the heating operation. During the cooling operation, the discharge pipe 82 and the first gas refrigerant pipe 83 are connected, and the suction pipe 81 and the second gas refrigerant pipe 85 are connected. On the other hand, during the heating operation, the discharge pipe 82 and the second gas refrigerant pipe 85 are connected, and the suction pipe 81 and the first gas refrigerant pipe 83 are connected.

(2-4) Accumulator The accumulator 21 has a gas-liquid separation function for separating the refrigerant into a gas phase and a liquid phase. The refrigerant flowing into the accumulator 21 is separated into a liquid phase and a gas phase, and the gas phase refrigerant that collects in the upper space is supplied to the compressor 23.

(2-5) Outdoor heat exchanger The outdoor heat exchanger 25 condenses or evaporates the refrigerant flowing inside through heat exchange with outdoor air. All of the outdoor heat exchangers 25 are made of aluminum or aluminum alloy. The outdoor heat exchanger 25 is separated from the steel member including the casing 50 directly by leaving an appropriate space with the steel member, or the resin member is replaced with the steel member and the outdoor heat exchanger 25. And placed in the casing 50.

  As shown in FIG. 3, the outdoor heat exchanger 25 extends to the left from the vicinity of an end portion of a partition plate 58 to be described later along the back side of the casing 50, and changes its direction near the left rear corner of the casing 50. , And extends forward along a left side plate 54 described later. The outdoor heat exchanger 25 is arrange | positioned above the 2nd left-right extending | stretching drainage channel part 61c of the bottom frame 60 mentioned later, and the front-back extension drainage channel part 61b.

(2-6) Expansion Valve The expansion valve 26 is provided for adjusting the refrigerant pressure and the refrigerant flow rate, and has a function of expanding the refrigerant in both the cooling operation and the heating operation.

(2-7) Outdoor Fan The outdoor fan 35 is a fan that blows air horizontally. The outdoor fan 35 is rotated by a motor 35 a fixed to a motor base 130 mainly made of steel, and takes outdoor air from the outside of the casing 50. The taken outdoor air passes through the outdoor heat exchanger 25, and is then discharged out of the casing 50 through the air outlet 51 a formed in the casing 50. That is, as the outdoor fan 35 rotates, the air moves approximately as shown by the arrows in FIG.

(2-8) Casing The casing 50 includes a left casing member 151 in which a front plate 51 and a left plate 54 are integrally formed, a right front plate 55, a right rear plate 56, a top plate 57, a partition plate 58, and a bottom frame 60. Consists of

(2-8-1) Left Casing Member The left casing member 151 is a plate-like member formed in a substantially L shape in plan view, and the front plate 51 and the left side plate 54 are integrally formed. The left casing member 151 extends substantially vertically upward from the bottom frame 60 to the top plate 57.

  The front plate 51 is a plate-like member that forms the left front of the casing 50. The front plate 51 is formed with an air outlet 51 a for blowing air from the outdoor fan 35. The blower outlet 51a is a circular opening. A bell mouth 95 protruding toward the inner side of the casing 50 is provided from the peripheral edge of the opening of the air outlet 51a. A fan grill 90 is attached to the outside of the casing 50 of the air outlet 51a.

  The left side plate 54 is a member constituting the left side surface of the casing 50 and faces a portion extending in the front-rear direction of the outdoor heat exchanger 25. The left side plate 54 is formed with a suction port 54 a for air sucked into the casing 50 by the outdoor fan 35.

(2-8-2) Right front plate The right front plate 55 is a plate-like member constituting the front part of the right front surface and the right side surface of the casing 50. The right front plate 55 extends substantially vertically upward from the bottom frame 60 to the top plate 57.

(2-8-3) Right rear plate The right rear plate 56 is a plate-like member that constitutes the rear portion of the right rear surface and the right side surface of the casing 50. The right rear plate 56 extends substantially vertically upward from the bottom frame 60 to the top plate 57. Between the rear end portion of the left side plate 54 of the left casing member 151 and the rear side end portion of the right rear plate 56, an air inlet 53a for air sucked into the casing 50 by the outdoor fan 35 is formed. The

(2-8-4) Top Plate The top plate 57 is a substantially rectangular plate-shaped member that constitutes the upper surface of the casing 50. The peripheral edge portion of the top plate 57 has a bent portion 57a bent downward. The left casing member 151, the right rear plate 56, and the like are fixed to the bent portion with screws or the like.

(2-8-5) Partition Plate The partition plate 58 is a plate-like member that extends substantially vertically upward from the bottom frame 60 of the casing 50 to the top plate 57. As shown in FIG. 3, the partition plate 58 has an arc shape in plan view. The partition plate 58 divides the inside of the casing 50 into a fan chamber S1 and a machine chamber S2.

  The blower chamber S1 is a space formed by surrounding the side surface with the left casing member 151 and the partition plate 58, and the outdoor fan 35 and the outdoor heat exchanger 25 are mainly disposed therein. The machine room S2 is a space formed by surrounding the side surfaces with the right front plate 55, the right rear plate 56, and the partition plate 58, and the compressor 23, the four-way switching valve 24, and the like are disposed therein.

(2-8-6) Bottom Frame The bottom frame 60 is a member that constitutes the bottom of the outdoor unit 20. The bottom frame 60 is made of a steel plate and is formed by pressing. The thickness of the steel plate is 1 mm. On the bottom frame 60, the compressor 23, the outdoor heat exchanger 25, the motor base 130 of the motor 35a of the outdoor fan 35, and the like are installed and fixed by screws or the like.

  As shown in FIG. 4, the bottom frame 60 constitutes the lower surface of the casing 50, and includes a bottom plate portion 60 a that is substantially rectangular in plan view and a bent portion 60 b that extends upward from the periphery of the bottom plate portion 60 a. The left casing member 151, the right rear plate 56, and the like are fixed to the bent portion 60b with screws or the like.

  Hereinafter, the bottom plate portion 60a will be described in detail with reference to FIGS.

(2-8-6-1) Bottom plate portion The bottom plate portion 60a is formed with a plurality of projections and depressions, and as shown in FIG. 5, approximately four steps (first to fourth steps L1, L2, L2) in the height direction. L3, L4). The first stage L1, the second stage L2, the third stage L3, and the fourth stage L4 are arranged in order from the lowest stage. The first step L1 and the second step L2 are separated by a step portion 62.

  The first to fourth steps L1, L2, L3, L4 and the step portion 62 will be described in detail.

(A) First Stage The first stage L1 is a drainage channel 61 through which drain water flows. The drainage channel 61 includes a first left / right extension drainage channel 61a, a front / rear extension drainage channel 61b, a second left / right extension drainage channel 61c, an inclined drainage channel 61d, and a machine room water conduit 61e. . Since the drainage channel portion 61 has a portion with an inclined bottom surface for the purpose of improving drainage, there is a slight difference in height even in the first stage L1.

  As shown in FIG. 4, the first left-right extending drainage channel 61a extends in the left direction from the lower side of the compressor installation portion 68 in the machine room S2 to the vicinity of the left bent portion 60b. The first left and right extending drainage channel 61a is formed to have a downward slope toward the left from the lower side of the compressor installation portion 68 to the vicinity of the center in the left and right direction of the bottom plate portion 60a, and then flattened.

  The front / rear extending drainage channel portion 61b extends from the left end of the first left / right extension drainage channel portion 61a toward the back side. More specifically, as shown in FIG. 4, the front / rear extending drainage channel portion 61b extends rearward from the left end portion of the first left / right extension drainage channel portion 61a, and is positioned to the right near the left rear corner of the bottom plate portion 60a. The direction is changed backward and extends to the bent portion 60b on the back side. Three first openings 69a are formed on the bottom surface of the front / rear extending drainage channel portion 61b as drainage holes for discharging drain water.

  The second left and right extending drainage channel portion 61c extends rightward from the back side end of the front and rear extension drainage channel portion 61b to the vicinity of the partition plate 58. A first opening 69a and a second opening 69b are formed on the bottom surface of the second left and right extending drainage channel portion 61c as drainage holes for discharging drain water. There are five first openings 69a and one second opening 69b. In addition, the outdoor heat exchanger 25 is arrange | positioned above the front-back extending | stretching drainage channel part 61b and the 2nd right-and-left extending | stretching drainage channel part 61c.

  The inclined drainage channel part 61d is formed so as to surround the front, right side, and left side of the motor base fixing part 130a included in the second stage L2 described later, and the second left and right extension drainage channel part 61c on the back side. It is connected to the front edge. As shown in FIG. 7, the inclined drainage channel portion 61 d is formed to have a downward slope from the front edge portion of the inclined drainage channel portion 61 d toward the second left and right extending drainage channel portion 61 c.

  The machine room water conduit 61e is mainly formed in the machine room S2. As shown in FIG. 4, the machine room water conduit 61 e extends rightward from the vicinity of the center of the right end of the second left and right extending drainage channel 61 c, changes direction near the right rear corner of the bottom surface 60 a, and extends forward. .

(B) Stepped portion The stepped portion 62 is disposed between the first stage L1 and the second stage L2, and separates the first stage L1 and the second stage L2. In other words, the stepped portion 62 is formed at the edge of the drainage channel portion 61. As shown in FIGS. 5 to 8, the stepped portion 62 is formed so as to rise upward from the drainage channel portion 61 that is the first step L1 toward the second step L2. The stepped portion 62 is not arranged mainly for reinforcement, but the stepped portion 62 having a certain length or more contributes to improving the strength of the bottom plate portion 60a.

The stepped portion includes first to fourth stepped portions 62a, 62b, 62c, and 62d. The first stepped portion 62a is formed in an annular shape having an opening on the front left side below the compressor installation portion 68 as shown in FIG. The first left and right extending drainage channel 61a extends in the left direction from the opening so as to sandwich the front and rear. The first step portion 62a has a length of about 80% of the total length W in the left-right direction of the bottom frame 60 in the left-right direction.

  The second stepped portion 62b extends from the left end on the back side of the first stepped portion 62a along the right edge of the front / rear extending drainage channel portion 61b. The second step portion 62b has a length in the front-rear direction that is approximately 60% of the total length D of the bottom frame 60 in the front-rear direction.

  The third stepped portion 62c extends from the right end of the second stepped portion 62b along the second left and right extending drainage channel portion 61c, the inclined drainage channel portion 61d, and the machine room water conduit 61e. Specifically, the third stepped portion 62c extends from the right end of the second stepped portion 62b to the position where the second left / right extended drainage channel portion 61c and the left rear end portion of the inclined drainage channel portion 61d are connected to each other. It extends in the right direction along the front edge of the extended drainage channel 61c. From the left rear end portion of the inclined drainage channel portion 61d, the third stepped portion 62c extends along the left edge portion, the front edge portion, and the right edge portion of the inclined drainage channel portion 61d along the right rear end portion of the inclined drainage channel portion 61d. It extends to the part. From the right rear end portion of the inclined drainage channel portion 61d, the third stepped portion 62c extends rightward along the front edge portion of the second left-right extending drainage channel portion 61c. The third stepped portion 62c extends from the vicinity of the center of the right end of the second left and right extending drainage channel 61c so as to surround the machine chamber water conduit 61e, and returns to the right end of the second left and right extending drainage channel 61c. Finally, it extends rearward to the bent portion 60b on the back side. The third stepped portion 62c has a length of about 80% of the total length W in the left-right direction of the bottom frame 60 in the left-right direction. Moreover, the 3rd level | step-difference part 62c has the front-and-back step part 62ca, 62cb, 62cc which has the length of 25% or more of the full length D of the front-back direction of the bottom frame 60 in the front-back direction like FIG. The front and rear stepped portions 62ca and the front and rear stepped portions 62cb intersect the left and right stepped portions 62cd at the stepped corner portions 62ce and 62cf.

  The fourth step portion 62d is formed so as to surround a motor stage fixing portion 130a of a second step L2 described later. As shown in FIG. 4, the fourth step portion 62 d has front and rear step portions 62 da and 62 db having a length of 25% or more of the total length D of the bottom frame 60 in the front-rear direction.

(C) Second Stage The second stage L2 is positioned along the front surface of the bottom plate portion 60a and the central portion 63a located near the center of the bottom plate portion 60a in the front-rear direction, as shown in FIGS. 4 and 6-8. Including a front portion 63b and a motor base fixing portion 130a. The central part 63a and the front part 63b extend from the blower room S1 to the machine room S2. The right front edge part of the center part 63a and the right rear edge part of the front part 63b are formed so as to be connected. The central portion 63a and the motor base fixing portion 130a are separated by an inclined drainage channel portion 61d.

  Above the central portion 63a, a first strength rib 64 included in a third stage L3, which will be described later, and a compressor fixing part 23a included in a fourth stage L4 are formed.

  Above the front part 63b, a second strength rib 65 included in a third stage L3 described later and a compressor fixing part 23a included in a fourth stage L4 are formed.

  The motor base 130 is fixed to the motor base fixing part 130a.

(D) Third Stage The third stage L3 includes first and second strength ribs 64 and 65.

  As shown in FIGS. 4 to 7, the first strength rib 64 is formed so as to protrude upward from the central portion 63 a in the central portion 63 a of the second step L <b> 2 formed so as to be surrounded by the stepped portion. The As shown in FIG. 4, the first strength rib 64 includes a left and right extending rib 64a and two front and rear extending ribs 64b extending rearward from the back side of the left and right extending rib 64a. The front and rear extending ribs 64b are formed integrally with the left and right extending ribs 64a.

  As shown in FIG. 4, the left and right extending ribs 64a are formed so as to extend from the vicinity of the left end of the center portion 63a to the vicinity of the partition plate 58 across the center line in the left and right direction of the bottom plate portion 60a. The left and right extending ribs 64a extend along the front edge portion of the central portion 63a. The left and right extending ribs 64a share the end portion on the back side with the center portion 63a at the back side of the center portion 63a and separated from the drainage channel portion 61 by the left and right step portions 62cd. As a result, the left and right step portions 62cd and the left and right extending ribs 64a are formed to be continuous. The left and right extending ribs 64a are formed over most of the length in the left and right direction of the blower chamber S1. The left and right extending ribs 64 a have a length that is approximately 60% of the total length W of the bottom frame 60 in the left and right direction.

  As shown in FIG. 4, one of the two front and rear extending ribs 64b extends rearward from the vicinity of the left end of the left and right extending rib 64a across the center line in the front and rear direction of the bottom plate portion 60a. As shown in FIG. 4, the other front / rear extending rib 64b extends rearward from the center of the left / right extending rib 64a and the center of the right end of the left / right extending rib 64a across the center line in the front / rear direction of the bottom plate portion 60a. Extend. The front / rear extending rib 64b has a length of about 35% of the total length D in the front / rear direction of the bottom frame 60, including a portion integrated with the left / right extending rib 64a.

  Also, the corners 64c and 64d, which are located between the two front and rear extension ribs 64b and intersect the left and right extension ribs 64a and the front and rear extension ribs 64b, are covered with step corners 62ce and 62cf, respectively. Placed in. In other words, as shown in FIG. 4, the step corner 62ce is disposed in a space S3 formed on the side of the corner 64c facing the left and right extending ribs 64a and the front and rear extending ribs 64b in plan view. As shown in FIG. 4, the step corner 62cf is disposed in a space S4 formed on the side of the corner 64d facing the left and right extending ribs 64a and the front and rear extending ribs 64b in plan view.

  As shown in FIG. 7, the second strength rib 65 is formed so as to protrude upward from the front portion 63b in the front portion 63b of the second stage L2. As shown in FIG. 4, the second strength rib 65 extends from the vicinity of the center between the left end of the bottom plate portion 60a and the center in the left-right direction of the bottom plate portion 60a to straddle the center line in the left-right direction of the bottom plate portion 60a. It is formed so as to extend rightward to the vicinity. The second strength rib 65 extends along the rear edge of the front portion 63b. The second strength rib 65 has a length of about 50% of the total length W in the left-right direction of the bottom frame 60 in the left-right direction.

  The left and right extending ribs 64a and the second strength ribs 65 of the first strength rib 64 are rigid with respect to the first-order vibration mode in the left-right direction in which a bending moment acts in the X direction of FIG. 9, that is, the left-right direction of the bottom frame. To increase. On the other hand, the longitudinally extending ribs 64b of the first strength rib 64 increase the rigidity with respect to the primary vibration mode in the longitudinal direction in which a bending moment acts in the Y direction of FIG. 10, that is, the longitudinal direction of the bottom frame.

  Depending on the installation conditions of the outdoor unit 20, as shown in FIG. 11, a bending moment due to a secondary vibration mode in the left-right direction having a convex part projecting upward and a concave part projecting downward is applied to the bottom frame 60. May work. In this case, the bending moment can act in an intermediate direction (oblique direction) between the left-right direction (X direction in FIG. 10) and the front-rear direction (Y direction in FIG. 10). Since the first strength rib 64 has the left and right extending ribs 64a and the front and rear extending ribs 64b formed integrally, the rigidity of the bottom plate can be increased even in the vibration mode as shown in FIG.

(E) Fourth Stage The fourth stage L4 includes a compressor fixing portion 23a in the machine room S2.

  As shown in FIGS. 5 and 8, the compressor fixing portion 23a is formed so as to protrude upward from the center portion 63a or the front portion 63b of the second stage L2. A hole for inserting a bolt is formed in the center of the compressor fixing portion 23a. The compressor 23 installed in the compressor installation unit 68 in the machine room S2 is fixed to the compressor fixing unit 23a with bolts. The compressor 23 is fixed to the three compressor fixing portions 23a. As shown in FIG. 4, five compressor fixing portions 23a are formed so that the fixing position can be changed according to the dimensions of the compressor 23. ing.

(3) Features (3-1)
The outdoor unit 20 of the air conditioner 1 according to the present embodiment includes an outdoor heat exchanger 25 and a casing 50. The casing 50 includes a bottom frame 60 in which a first strength rib 64 and a drainage channel 61 that is partially located below the heat exchanger 25 are formed. The first strength rib 64 is formed other than the drainage channel portion 61, and includes a left-right extending rib 64a extending in the left-right direction and a front-rear extending rib 64b extending in the front-rear direction when the bottom frame 60 is viewed from above.

  Thereby, rigidity can be improved with respect to the moment which is going to bend the bottom frame 60 in the left-right direction or the front-back direction. That is, the bottom frame is less likely to vibrate due to the acting bending moment.

  Further, in the first strength rib 64, since the left and right extending ribs 64a extending in the left and right direction and the front and rear extending ribs 64b extending in the front and rear direction are combined, the first strength rib 64 is inclined (in the middle direction between the left and right direction and the front and rear direction). The rigidity of the bottom frame 60 can be increased even with respect to the acting bending moment.

(3-2)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the bottom frame 60 further includes a stepped portion 62 formed at the edge of the drainage channel portion 61 and a central portion 63a. The central portion 63 a is disposed above the drainage channel portion 61 and is formed to be separated from the drainage channel portion 61 by a stepped portion 62. The first strength rib 64 is formed in the central portion 63a. The step portion 62 has a second step portion 62b and front and rear step portions 62ca, 62cb, 62cc, 62da, 62db extending in the left-right direction and extending in the front-rear direction.

  Thereby, the bottom frame 60 is also reinforced by the stepped portion 62, and the rigidity of the bottom frame 60 with respect to the bending moment in the left-right direction can be further increased.

(3-3)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the first strength rib 64 has corner portions 64c and 64d where the left and right extending ribs 64a and the front and rear extending ribs 64b intersect. The step portion 62 includes a left and right step portion 62cd extending in the left and right direction, and step angle portions 62ce and 62cf where the front and rear step portions 62ca and 62cb intersect the left and right step portion 62cd. In plan view, the step corner 62ce is located in a space S3 formed on the side of the corner 64c facing the left and right extending ribs 64a and the front and rear extending ribs 64b. In plan view, the step corner 62cf is located in a space S4 formed on the side of the corner 64d facing the left and right extending ribs 64a and the front and rear extending ribs 64b.

  Thereby, it is possible to further increase the rigidity of the bottom frame 60 in the central portion 62a.

(3-4)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the drainage channel portion 61 is formed with a plurality of drainage holes (first opening 69a and second opening 69b).

  Thereby, the drainage property of the drainage channel part 61 is improved, and there exists an advantage that the bottom frame 60 grade | etc., Is hard to rust. By providing the first opening 69a and the second opening 69b in this manner, the rigidity of the bottom frame 60 is likely to be lowered, but the bottom frame 60 is sufficiently reinforced so that the rigidity can be ensured without problems.

(3-5)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the inside of the casing 50 is divided into the fan room S1 and the machine room S2. The first strength rib 64 is formed in the blower chamber S1.

  As a result, the rigidity of the bottom frame 60 can be increased in the blower chamber S1 that occupies a higher area than the machine chamber S2.

(3-6)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the bottom frame 60 is further formed with a second strength rib 65. The drainage channel portion 61 extends in the left-right direction, and has a second left-right extending drainage channel portion 61 c positioned below the outdoor heat exchanger 25. The second strength rib 65 is positioned on the opposite side of the first strength rib 64 from the second left-right extending drainage channel portion 61c and extends in the left-right direction.

  Thereby, the rigidity with respect to the bending moment of the left-right direction of the bottom frame 60 can fully be improved.

(4) Modifications Modifications of the present embodiment are shown below. A plurality of modified examples may be appropriately combined.

(4-1) Modification A
Although the outdoor unit 20 shown by said embodiment is used for the air conditioning apparatus 1, it is not limited to this, You may be used for another refrigeration apparatus.

(4-2) Modification B
In the above embodiment, the first and second strength ribs 64 and 65 are formed so as to protrude upward from the second stage L2, but the present invention is not limited thereto, and is formed so as to protrude downward. It may be done.

(4-3) Modification C
The length and position of each part shown by said embodiment are illustrations, and are not limited to this.

  However, the left and right extending ribs 64 a of the first strength rib 64 have a length of 25% or more of the total length W in the left-right direction of the bottom frame 60 in the left-right direction and straddle the center line in the left-right direction of the bottom frame 60. It is desirable to extend. The longitudinally extending ribs 64b of the first strength rib 64 have a length of 25% or more of the total length D in the longitudinal direction of the bottom frame 60 in the longitudinal direction, and extend across the center line in the lateral direction of the bottom frame 60. Is desirable.

  Further, the stepped portion 62 also has a length of 50% or more of the total length W in the left-right direction of the bottom frame 60 in the left-right direction from the viewpoint of strength, and the second stepped portion 62b and the front and rear stepped portions 62ca, 62cb. , 62cc, 62da, 62db preferably have a length of 25% or more of the total length D in the front-rear direction of the bottom frame 60 in the front-rear direction.

(4-4) Modification D
In the above-described embodiment, the first strength rib 64 has the two front and rear extending ribs 64b. However, the number of front and rear extending ribs 64b may be one or three or more.

  However, it is desirable to have two or more longitudinally extending ribs 64b.

(4-5) Modification E
In the above-described embodiment, the stepped portion 62 includes the second stepped portion 62b and the front and rear stepped portions 62ca, 62cb, 62cc, 62da, 62db extending in the front-rear direction by 25% or more of the total length D in the front-rear direction of the bottom frame 60. That is, there are a total of six step portions that satisfy the condition of extending 25% or more of the total length D in the front-rear direction of the bottom frame 60 in the front-rear direction. However, the number of stepped portions that satisfy the above conditions is not limited to this.

  However, it is desirable that there are five or more such stepped portions.

1 Air conditioning equipment (refrigeration equipment)
20 Outdoor unit 25 Outdoor heat exchanger (heat exchanger)
50 Casing 60 Bottom frame 61 Drainage channel portion 61c Second left and right extension drainage channel portion (left and right extension drainage channel portion)
62 Step 62b Second step (front and rear step)
62ca, 62cb, 62cc, 62da, 62db Front / rear stepped portion 62cd Left / right stepped portion 62ce, 62cf Stepped corner portion 63a Center portion (mountain portion)
64 First Strength Rib 64a Front / Rear Stretched Rib (First Part)
64b Left and right extension ribs (second part)
64c, 64d Corner 65 Second strength rib 69a First opening (drain hole)
69b 2nd opening (drain hole)
D Total length W of the bottom frame 60 in the front-rear direction Total length S1 of the bottom frame 60 in the left-right direction S1 Blower room S2 Machine rooms S3, S4 Space

JP 2002-277004 A

Claims (6)

A heat exchanger (25);
A casing (50) including a bottom frame (60) in which a first strength rib (64) and a drainage channel part (61) at least partly located below the heat exchanger are formed;
An outdoor unit (20) of a refrigeration apparatus (1) comprising:
The first strength rib is formed other than the drainage channel portion, and when the bottom frame is viewed from above, a first portion (64a) extending in the left-right direction and a second portion (64b) extending in the front-rear direction. Including
Outdoor unit. The bottom frame has a stepped part (62) formed at an edge of the drainage channel part,
A plateau portion (63a) disposed above the drainage channel portion and separated from the drainage channel portion by the stepped portion;
Further comprising
The first strength rib is formed on the plateau,
The step portion has five or more front and rear step portions (62b, 62ca, 62cb, 62cc, 62da, 62db) that extend in the left-right direction and extend in the front-rear direction.
The outdoor unit according to claim 1. The first strength rib has at least one corner (64c, 64d) where the first portion and the second portion intersect,
The step portion includes a left and right step portion (62cd) extending in the left and right direction, and a step corner portion (62ce, 62cf) where the front and rear step portion and the left and right step portion intersect,
The outdoor unit according to claim 2, wherein the step corner is located in a space (S3, S4) formed on a side of the corner facing the first portion and the second portion in plan view. A plurality of drain holes (69a, 69b) are formed in the drainage channel part.
The outdoor unit according to any one of claims 1 to 3. The inside of the casing is divided into a fan room (S1) and a machine room (S2),
The outdoor unit according to any one of claims 1 to 4, wherein the first strength rib is formed in the blower chamber. A second strength rib (65) is further formed on the bottom frame,
The drainage channel portion has a left and right extension drainage channel portion (61c) extending in the left-right direction and positioned below the heat exchanger,
The second strength rib is located on the opposite side of the left and right extending drainage channel portion with respect to the first strength rib, and extends in the left-right direction.
The outdoor unit according to any one of claims 1 to 5.

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