JP2004020165A - Outdoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress damage of base legs without marring the workability in installation. <P>SOLUTION: This air conditioner is provided with an outdoor side refrigerant circuit 3 including, at least, a compressor 21 and a heat exchanger 20, and a case 2 having an upper case part 2a storing the heat exchanger 20 and a lower case part 2b storing the compressor 21 provided in the lower part of the upper case part 2a. The lower case part 2b has a small cross section compared with that of the upper case part 2a and has a plurality of supports 5a-5d projecting downward from the bottom part of the case 2, and the bottom ends of the supports are installed on an installation surface. The bottom ends of the plurality of supports are provided with the fixing base legs 12a-12d extending inward. This constitution can secure a large heat exchange area and eliminate the marring of the heat exchange efficiency. The lower case part is formed into a relatively small size so that the manufacturing cost such as the material cost and the like is lowered to reduce the cost of the outdoor unit whole body. A space is secured between the case bottom part and the installation surface and is used for a fixing work when fixing the bottom ends of the supports to the installation surface, thereby facilitating the fixing work. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an outdoor unit of an air conditioner, particularly to an outdoor unit of an air conditioner in which a heat exchanger and a compressor are housed inside a case.
[0002]
[Prior art]
As an air conditioner, there is a so-called multi-type air conditioner for buildings in which a plurality of indoor units are connected to one outdoor unit. In such a device, the outdoor unit is generally installed on the roof of a building, and the temperature-controlled air is supplied from the outdoor unit to indoor units provided in each room of the building.
[0003]
An outdoor unit in a conventional air conditioner has a rectangular parallelepiped case, in which a heat exchanger is provided above and a compressor and other components are provided below. A fan and a motor for driving the fan are provided on the upper surface of the case.
As described above, such an outdoor unit is installed on the roof of a building or the like. For installation, a plurality of flange-like foundation legs projecting outward are provided at the bottom of the case. Then, the entire outdoor unit is fixed by fixing the foundation legs to the concrete portion of the building with a chemical anchor or the like.
[0004]
[Problems to be solved by the invention]
As described above, especially the multi-unit outdoor unit for a building has a large overall size including a case. Therefore, it is desirable to make the unit as compact as possible in consideration of material costs and the like.
In addition, since the base legs provided in the conventional outdoor unit project further outward from the outer periphery of the case, the base legs are likely to come into contact with other members when the outdoor unit is transported, and are liable to hit the ground or the like when dropped. There are cases. Therefore, the base legs in the conventional device are required to have a strength higher than that required for normal fixing, and a steel plate having a relatively large thickness is used. This hinders cost reduction.
[0005]
Then, the present inventors devised that the column of the case is provided so as to protrude further downward from the bottom of the case, and the base leg is provided at the lower end thereof toward the inside of the case. According to this, the pillars and the like come into contact before the foundation legs come into contact with other members, and the foundation legs are protected by the pillars and the like, so that the plate thickness of the foundation legs can be reduced and the cost can be reduced. Can be planned.
[0006]
However, in order to fix the foundation leg with a chemical anchor, a space for work is required above the foundation leg. Work becomes very difficult.
An object of the present invention is to configure an outdoor unit at low cost.
Another object of the present invention is to make it possible to suppress damage to a foundation leg without impairing workability when installing an outdoor unit.
[0007]
[Means for Solving the Problems]
The outdoor unit of the air conditioner according to claim 1 includes an outdoor refrigerant circuit including at least a compressor and a heat exchanger, an upper case portion that stores the heat exchanger, and a compressor provided below the upper case portion. And a case having a lower case portion. The lower case has a smaller cross-sectional area than the upper case.
[0008]
Here, in the outdoor unit, the heat exchanger and the compressor are main components, but the heat exchanger needs to secure a large heat exchange area in order to increase the heat exchange efficiency. On the other hand, the space occupied by the compressor is small, and even if it includes other components other than the heat exchanger, they can be stored in a relatively small space.
Therefore, in the invention according to claim 1, the heat exchanger is housed in the upper case portion and the compressor is housed in the lower case portion. Then, the upper case portion is relatively large, and the lower case portion is housed in the upper case portion. It is smaller in comparison, that is, the cross-sectional area of the cross section is reduced.
[0009]
In such an outdoor unit, a large heat exchange area can be secured as in the conventional device, and the heat exchange efficiency is not impaired. Moreover, since the lower case portion is relatively small, manufacturing costs such as material costs are reduced, and the cost of the entire outdoor unit can be reduced.
An outdoor unit of an air conditioner according to a second aspect is the outdoor unit according to the first aspect, further comprising a plurality of columns provided so as to protrude further downward from the bottom of the case.
[0010]
This outdoor unit has a column that protrudes downward from the bottom of the case, and the lower end of this column is installed on the installation surface. Therefore, a space is secured between the bottom of the case and the installation surface, and this space can be used to route an external pipe or the like, which facilitates pipe management. Further, the space can be used as a space for fixing work when fixing the lower end of the column to the installation surface, and the fixing work is facilitated.
[0011]
An outdoor unit of an air conditioner according to claim 3 is the outdoor unit according to claim 2, wherein the lower ends of the plurality of columns are provided with fixing base legs so as to extend toward the inside of the case. I have.
The outdoor unit is installed by fixing a foundation leg provided at a lower end of a plurality of columns to a fixed member. For example, in a multi-type outdoor unit for a building, a foundation leg is fixed to a concrete portion on the roof of the building by a chemical anchor or the like, and thereby the entire unit is fixed.
[0012]
Here, since the base legs are provided so as to extend toward the inside of the case, when the outdoor unit is transported or installed, the base legs may collide with the member on the partner side, fall, or the like. The strut located outside the leg contacts the mating member or the ground first, rather than the leg. That is, the foundation legs are protected by the columns or the like, so that the plate thickness can be reduced as compared with the conventional foundation legs, and the cost can be reduced.
[0013]
In addition, when the base legs are provided facing the inside of the case, when the base legs are fixed by a chemical anchor or the like, a space for fixing work is required above the base legs, but in the present invention, as described above, A space is secured between the bottom of the case and the installation surface, and the lower case is smaller than the upper case, allowing more space for fixing work and fixing the base legs Becomes easier.
[0014]
The outdoor unit of the air conditioner according to claim 4 is the outdoor unit according to claim 2 or 3, wherein the plurality of pillars are provided at a plurality of locations on the outer peripheral portion of the case so as to extend in a vertical direction, and the plurality of foundations are provided. The legs are formed by partially bending the lower ends of the columns.
In this outdoor unit, a part of the lower end of each column is bent, that is, a foundation leg is formed integrally with the column. For this reason, compared with a case where another member is fixed to the support column by welding or the like, it can be configured at a lower cost.
[0015]
An outdoor unit for an air conditioner according to claim 5 is the outdoor unit according to claim 3 or 4, wherein the case has a rectangular cross section, and a plurality of columns are provided at four corners of the case. At least one of a pair of opposed side walls constituting the part is inclined so as to be located inside the case as going downward. The foundation legs provided on the two columns provided along the inclined side wall are provided so as to face each other and to approach each other.
[0016]
Here, the base legs provided on the two columns are provided so as to face each other and approach each other, but the side wall of the lower case portion provided above the base legs is inclined inwardly toward the inside of the case as going downward. are doing. Therefore, a work space for fixing the base leg can be secured above the base leg, and the work space becomes wider as the base leg is approached, so that the work becomes easier.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an outdoor unit 1 of an air conditioner according to one embodiment of the present invention. The outdoor unit 1 is used for a multi-type air conditioning system for buildings, and is generally installed on the roof of a building. In FIG. 1, the external piping is omitted.
[0018]
[Constitution]
The outdoor unit 1 has a substantially rectangular parallelepiped case 2 and an outdoor refrigerant circuit 3 housed inside the case 2.
As described above, the case 2 has a substantially rectangular parallelepiped shape, a rectangular cross section, and four columns 5a, 5b, 5c, and 5d arranged at four corners, and air Left and right ventilation portions (openings) 6 and 7 through which inflow is possible, a front plate 8, a rear plate 9, a top plate 10, and a bottom plate 11 are provided.
[0019]
The four columns 5a to 5d are formed of rectangular pipe members, and the top plate 10 is fixed to the upper ends of the columns 5a to 5d. Further, the columns 5a to 5d extend so as to protrude further downward from the bottom plate 11 of the case 2, so that when the outdoor unit 1 is installed, a space is formed below the bottom plate 11. Has become. At the lower ends of the columns 5a to 5d, there are provided rectangular base legs 12a, 12b, 12c and 12d (parts of the base legs 12d are not shown in FIG. 1) formed by bending a part of them into the inside of the case. Have been. Of the base legs 12a to 12d, the base legs 12b and 12c of the two columns 5b and 5c provided along the front plate 8 are formed so as to face each other and extend so as to approach each other. Similarly, the base legs 12a and 12d of the columns 5a and 5d are formed so as to face each other and extend so as to approach each other. In each of the base legs 12a to 12d, a through hole through which a chemical anchor for fixing is inserted is formed.
[0020]
The left and right ventilation portions 6 and 7 are openings through which air can flow from the outside to the inside of the case 2, and lateral grills 13 and 14 are mounted on the outside thereof.
The front plate 8 is composed of a front plate upper portion 8a arranged in an upper portion and a front plate lower portion 8b arranged in a lower portion. The front plate upper portion 8a is fixed outside the columns 5b and 5c. Further, the front plate lower portion 8b is fixed inside the two columns 5b, 5c, and the upper end portion is continuous with the front plate upper portion 8a. (Rear side).
[0021]
The rear plate 9 has substantially the same configuration as the front plate 8, although not clearly shown in the drawing. That is, the rear plate 9 is composed of a rear plate upper portion formed at the same height position as the front plate upper portion 8a, and a rear plate lower portion formed at the same height position as the front plate lower portion 8b. As it goes downward, it is inclined so as to enter more inside (front side) of the case 2. An opening is formed in most of the upper part of the rear plate, so that air from outside can flow in.
[0022]
An opening is formed at the center of the top plate 10, and a cylindrical bell mouth 15 is provided so as to cover this opening. A fan 16 is rotatably provided inside the bell mouth 15, and the fan 16 is rotatably driven by a fan motor 17 disposed therebelow. The fan motor 17 is supported by the case 2 by a support frame (not shown). Further, a fan grill 18 is attached to an upper opening of the bell mouth 15.
[0023]
The case 2 having such a configuration includes a front plate upper portion 8 a of the front plate 8, a rear plate upper portion of the rear plate 9, and portions of the ventilation portions 6 and 7 arranged at the same height position as the front plate upper portion 8 a. Thus, the upper case 2a is formed. The lower case portion 2b is formed by the front plate lower portion 8b of the front plate 8, the rear plate lower portion of the rear plate 9, and the portions of the ventilation portions 6 and 7 which are arranged at the same height position as the front plate upper portion 8b. Is formed. As described above, the lower portion of the front plate 8b of the front plate 8 and the lower portion of the rear plate 9 of the rear plate 9 constituting the lower case portion 2b are inclined so as to be located inside the case from the upper end to the lower end. The case 2b has a smaller projected area in plan view than the upper case 2a except for a boundary portion with the upper case 2a. That is, the lower case portion 2b has a smaller cross-sectional area than the upper case portion 2a. For this reason, compared with the case where the cross-sectional area of the cross section of the upper and lower parts of the case 2 is made the same, material cost becomes low and cost can be reduced.
[0024]
The refrigerant circuit 3 mainly includes a heat exchanger 20 arranged above the inside of the case 2, a compressor 21 fixed on the bottom plate 11 of the case 2, and piping connecting these. The heat exchanger 20 is formed in a U-shape in plan view, and is arranged along the left and right ventilation portions 6 and 7 of the case 2 and the rear plate 9. The heat exchanger 20 exchanges heat between the air flowing from the outside and the refrigerant. The heat exchanger 20 is disposed at a height position corresponding to the upper portion of the front plate 8a and the upper portion of the rear plate, that is, housed in the upper case portion 2a. On the other hand, the compressor 21 is arranged so as to be housed in the height position corresponding to the lower portion of the front plate 8b and the lower portion of the rear plate, that is, in the lower case portion 2b.
[0025]
[Installation]
When such an outdoor unit 1 is installed, as shown in FIG. 2, the worker is located on the A side and fixes the foundation legs 12b and 12c with a chemical anchor or the like, and is located on the B side and is located on the B side. , 12d are fixed by a chemical anchor or the like. As described above, since the two base legs 12b and 12c and the other two base legs 12a and 12d are formed so as to face each other and approach each other, the fixing operation of the two base legs is performed from one place. As a result, the fixing work of four foundation legs from two places can be performed.
[0026]
Further, when hitting the chemical anchor, a space is required above the chemical anchor, but the front plate 8 and the rear plate 9 (the lower portion of the front plate 8b and the lower portion of the rear plate) of the lower case portion 2b are placed inside the case as going downward. Since it is inclined, a work space can be secured above each of the foundation legs 12a to 12d, and the work is facilitated.
When the outdoor unit 1 is transported or installed, the column or the like may collide with another member or may collide with the ground by dropping. In the conventional device, in consideration of such a situation, the thickness of the foundation leg is made sufficiently large to secure the strength so that deformation or the like does not occur even in the event of a collision. However, in this embodiment, the foundation legs 12a to 12d are provided so as to extend inside the case. Therefore, even when this unit is dropped at the time of installation, for example, as shown in FIG. Hits the ground, and prevents direct contact of the foundation leg 12b. That is, the foundation legs are protected by the columns. For this reason, it is sufficient that the strength of the base leg is secured at the time of fixation, and the plate thickness can be reduced as compared with the conventional base leg, and the cost can be reduced.
[0027]
[Operation during operation]
The operation of the outdoor unit 1 installed as described above will be briefly described below.
During the operation of the outdoor unit 1, air flows from the outside of the case 2 into the inside through the ventilation portions 6 and 7 and through the opening of the rear plate 9 by the rotation of the fan 16. The air exchanges heat with the refrigerant by passing through the heat exchanger 20, and the heat exchanged air is exhausted to the outside of the case 2 via the bell mouth 15.
[0028]
Here, the heat exchange efficiency largely depends on the heat exchange area of the heat exchanger, but in this embodiment, the space of the upper case portion 2a, that is, the space where the heat exchanger 20 is housed is compared with the conventional device. It is the same space, and there is no change in the heat exchange area of the heat exchanger 20. Therefore, the heat exchange efficiency is not impaired. Moreover, since the dead space of the lower case portion 2b where the heat exchanger 20 is not originally arranged is cut to secure a work space for fixing the foundation legs, the installation workability can be improved without impairing the heat exchange efficiency. can do.
[0029]
[Other embodiments]
(A) The shape and the projecting direction of the foundation leg are not limited to the above embodiment. For example, each base leg may be formed to project in a different direction. Further, in the above embodiment, each foundation leg is formed integrally with the column, but another member may be fixed to the column by welding or the like.
[0030]
(B) In the above-described embodiment, in the lower case portion 2b, the lower portion of the front plate 8b and the lower portion of the rear plate are inclined such that the lower side is inclined more toward the inside of the case, but the shape of the lower case portion is limited to such a shape. Not done. Any shape may be used as long as it does not affect the arrangement of the components and the like housed therein and can secure a space for fixing the base legs.
[0031]
(C) As an example of the outdoor unit, a multi-type outdoor unit for buildings has been described. However, the present invention can be similarly applied to an outdoor unit used for a home air conditioner.
[0032]
【The invention's effect】
The outdoor unit of the air conditioner according to claim 1, wherein the heat exchanger is housed in the upper case portion and the compressor is housed in the lower case portion, the upper case portion is relatively large, and the lower case portion is in the upper case portion. Since the size is smaller than the above, the heat exchange area is secured large, and the heat exchange efficiency is not impaired, the production cost such as the material cost is reduced, and the cost of the entire outdoor unit can be reduced.
[0033]
Since the outdoor unit of the air conditioner according to claim 2 has the columns that protrude downward from the case bottom, a space is secured between the case bottom and the installation surface, and this space is used for routing external piping. Or used as a space for fixing work when fixing the lower end of the support to the installation surface. In the outdoor unit of the air conditioner according to claim 3, since the base leg extends toward the inside of the case, it is possible to prevent the base leg from colliding with another member or the like during transportation or installation of the outdoor unit. It can be avoided, and therefore, the board thickness of the foundation leg can be made relatively thin to reduce the cost. In addition, even if the foundation legs are provided toward the inside of the case, according to the present invention, a space is secured between the case bottom and the installation surface, and the lower case is formed smaller than the upper case. The space for fixing work can be secured more widely, and the base legs can be easily fixed.
[0034]
Since the outdoor unit of the air conditioner according to the fourth aspect is formed by bending a part of the lower end of each of the columns, the outdoor unit can be configured at a lower cost as compared with a case where another member is fixed to the column by welding or the like. .
In the outdoor unit of the air conditioner according to claim 5, since the side wall of the lower case portion provided above the foundation leg is inclined inward as going downward, the foundation leg is placed above the foundation leg. A work space for fixing can be secured, and the work space is wider as the base leg is approached, so that work becomes easier.
[Brief description of the drawings]
FIG. 1 is an external perspective view of an outdoor unit according to an embodiment of the present invention.
FIG. 2 is a schematic plan view showing a positional relationship between respective foundation legs of the outdoor unit.
FIG. 3 is a partial external view showing a state where the outdoor unit is dropped.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Case 3 Refrigerant circuit 5a-5d Support pillar 12a-12d Foundation leg 20 Heat exchanger 21 Compressor

Claims (5)

An outdoor refrigerant circuit (3) including at least a compressor (21) and a heat exchanger (20);
A case (2) including an upper case portion (2a) for housing the heat exchanger (20) and a lower case portion (2b) provided below the upper case portion (2a) and housing the compressor (21). 2) and
The lower case portion (2b) has a smaller cross-sectional area in cross section than the upper case portion (2a).
Outdoor unit of air conditioner. The outdoor unit of an air conditioner according to claim 1, further comprising a plurality of columns (5a-5d) provided so as to protrude further downward from a bottom portion of the case (2). The lower end of each of the plurality of columns (5a-5d) is provided with a fixing base leg (12a-12d) so as to extend toward the inside of the case (2), respectively. Outdoor unit of air conditioner. The plurality of columns (5a-5d) are provided at a plurality of locations on the outer peripheral portion of the case (2) so as to extend vertically.
The plurality of foundation legs (12a-12d) are formed by partially bending the lower ends of the columns (5a-5d).
An outdoor unit of the air conditioner according to claim 2. The case (2) has a rectangular cross section,
The plurality of columns (12a-12d) are provided at four corners of the case (2),
At least one (8b) of a pair of opposing side walls constituting the lower case portion (2b) is inclined so as to be located inside the case (2) as going downward.
Foundation legs (12b, 12c) provided on two columns (5b, 5c) provided along the inclined side wall (8b) are provided so as to face each other and to approach each other.
An outdoor unit of the air conditioner according to claim 3.

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