JP2003254565A - Outdoor machine for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve energy saving performance and to reduce the size of an outdoor machine for an air conditioner at the same time. <P>SOLUTION: In this outdoor machine for an air conditioner comprising a first heat exchanger 2 with a U-shaped cross section located on three faces of the front, right and left sides of an outdoor machine body 1 and extending from its bottom to the top and blower fans 4 and 5 located at the top of the outdoor machine body 1 for sucking air through the first heat exchanger 2 wit the U-shaped cross section, a second heat exchanger 3 located on the back on the top of the air conditioner body 1 is provided so as to have the top of the outdoor machine body 1 with a 4-faced suction structure in order to expand a heat exchange area. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an outdoor unit for an air conditioner.

[0002]

2. Description of the Related Art From the viewpoint of recent emphasis on energy-saving performance, it is required to improve the energy-saving performance of, for example, an outdoor unit for an air conditioner. Especially for buildings, which are relatively large, and the demand for them is high.

In the case of an outdoor unit for an air conditioner, in order to improve its energy-saving performance, in the range of a limited body space,
It is necessary to increase the heat exchange area of the heat exchanger as effectively as possible, prevent the drift of air from the suction section to the blow section, and maximize the heat exchange capacity.

As an example of the outdoor unit often used for the above-mentioned relatively large-sized air conditioner, there is, for example, a top-blowing type air conditioner outdoor unit having an axial flow type fan at the top. Further, in such a top-blowing outdoor unit, there are several patterns in the method of arranging the heat exchanger. For example, as an example, the inside of the outdoor unit main body is not separated into upper and lower parts, and a U-shaped heat exchanger is used to apply heat to the three sides of the outer peripheral surface of the outdoor unit main body: There is an outdoor unit with an exchanger.

In a top-blowing type outdoor unit of this type, when the size of the heat exchanger is increased in order to improve energy efficiency, when the heat exchanger is expanded in the height direction or the width direction, the outdoor unit main body Since the size of the outer diameter is increased, there may be a problem when carrying it into the installation place or installing it. In addition, if a part of the fan suction side is blocked in the machine room, etc., uneven flow occurs in the outdoor unit body, increasing the internal pressure loss, increasing fan noise and fan input, and lowering heat exchange efficiency. There was a problem.

Therefore, as another type, for example, the lower part inside the outdoor unit main body is a machine room, the upper part is a heat exchange chamber, and heat exchangers are arranged on four sides of the upper side heat exchange chamber, and Place an axial fan at the top of the space,
There is one in which the loading efficiency between the mechanical device and the heat exchanger is improved and the area of the heat exchanger is expanded (for example, Japanese Unexamined Patent Publication No.
No. 1-220111).

In such an outdoor unit, since suction is possible from all directions around the outer periphery of the fan, uneven flow is less likely to occur in the outdoor unit, and the problem of increased fan noise and fan input can be avoided.

[0008]

On the other hand, in the case of such a construction, on the other hand, if the size of the outdoor unit main body is correspondingly enlarged and further increased to increase the heat exchange area of the heat exchanger, it is essentially Against the demand for compactness, transportability,
The handling is also poor.

The present invention has been made to solve such a problem, and in the limited volume space of the outdoor unit main body, heat exchange is performed while maximizing the loading efficiency of the heat exchanger. By expanding the heat exchange area of the vessel,
It is an object of the present invention to provide an outdoor unit for an air conditioner that achieves both compactness of the outdoor unit body and high energy-saving performance.

[0010]

In order to achieve the object, the present invention comprises the following means for solving the problems.

(1) Invention of Claim 1 The outdoor unit for an air conditioner of the present invention is located in three faces of the outdoor unit main body 1 on the front side and both right and left sides, and has a U-shaped cross section extending from the bottom to the top. Air including a first heat exchanger 2 of a mold and blower fans 4 and 5 located above the outdoor unit body 1 and sucking air through the first heat exchanger 2 having a U-shaped cross section. In the outdoor unit for a harmony machine, the second heat exchanger 3 is provided on the back side of the upper portion of the air conditioner body 1 so that the upper portion of the outdoor unit body 1 has a four-sided suction structure. I am trying.

In the case of such a structure, the heat exchange area is effectively expanded by providing a new heat exchanger 3 by utilizing the remaining one surface on the upper side of the outdoor unit main body, which was conventionally the three-side suction. , Further increasing the heat exchange capacity. Therefore, the size of the outdoor unit body does not increase even if the heat exchange area is increased, and the outdoor unit body remains compact.

Further, since the four sides are sucked in the vicinity of the blower fan, the flow velocity distribution of the air in the heat exchanger portion is made uniform, uneven flow is eliminated, pressure loss in the machine is reduced, and noise is also reduced.

Therefore, they also improve the heat exchange performance. Therefore, it becomes possible to effectively bring out the maximum heat exchange capacity within the maximum heat exchange area corresponding to a certain size of the outdoor unit body, and low noise with an appropriate air volume corresponding to that capacity. It is possible to enable highly efficient operation.

(2) Invention of Claim 2 In the outdoor unit for an air conditioner of the present invention, in the configuration of the invention of Claim 1, the second heat exchanger 3 is the first heat exchanger 2 Is characterized by being a flat plate heat exchanger independent of.

In the case of such a configuration, the second plate structure having the same plate structure is used.
The function of the invention of claim 1 can be effectively realized by the heat exchanger 3 of (3) Invention of claim 3 The outdoor unit for an air conditioner of this invention is the same as that of the invention of claim 1. In the configuration, the second heat exchanger 3 is configured such that the first heat exchanger 2 is divided into upper and lower two-stage structures 2A and 2B, and one of the left and right side portions of the upper heat exchanger 2A is extended and bent. It is characterized by being configured and composed.

In the case of such a configuration, the heat exchanger 3 similar to that of the invention of claim 2 can be constructed without disposing a new refrigerant pipe, thereby more efficiently and as described above. The operation of the invention of claim 1 can be obtained.

(4) Invention of Claim 4 The outdoor unit for an air conditioner according to the present invention is the same as the outdoor unit for an air conditioner according to any one of Claims 1, 2, and 3, but has the first and second heat exchangers 2 and 3. Is characterized in that the refrigerant is commonly supplied via one compressor 6.

With such a structure, only one compressor 6 is required, and the connection work of the refrigerant pipes and the like is easy.

(5) Invention of Claim 5 The outdoor unit for an air conditioner of the present invention is the structure of the invention of Claim 1, 2 or 3, wherein the first and second heat exchangers 2, 3 are provided. , Two corresponding compressors 6A,
It is characterized in that the refrigerant is supplied individually via 6B.

According to this structure, since the compressors 6A and 6B are installed corresponding to the first and second heat exchangers 2 and 3, the refrigerant pipes and other connections are required individually. However, the uneven flow of the refrigerant can be prevented, and stable operation can be performed.

[0022]

As a result of the above, according to the outdoor unit for an air conditioner of the present invention, in the outdoor unit body having a constant volume space,
The maximum effective heat exchange area and heat exchange efficiency can be realized.

As a result, it is possible to provide a compact outdoor unit with low noise, high heat exchange performance, and both energy saving performance and compactness can be achieved.

Further, such compactness makes it easy to carry in, for example, a small elevator, and facilitates transportation and installation work at the time of installation on a rooftop or other high place.

In general, in outdoor units, a plurality of types of capacities (number of horsepower) are used for the purpose of cost reduction by sharing parts.
There is a case where the outdoor units of the above are configured in the same casing.
Even in such a case, according to the configuration of the present invention,
The capacity (number of horsepower) can be arbitrarily changed depending on the presence or absence of the second heat exchanger, and the capacity can be easily changed (set) (when the capacity is high, the first and second heat exchangers are used, Only the first heat exchanger is used when the capacity is low).

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS. 1 and 2
FIG. 3 shows the configuration of the outdoor unit for an air conditioner according to Embodiment 1 of the present invention.

In FIGS. 1 and 2, first, reference numeral 1 is a main body casing of the outdoor unit. This body casing 1
Is a rectangular parallelepiped metal plate that is long in the left-right direction as a whole and has a predetermined height in the up-down direction. The openings 1b and 1c for the rear side, the opening 1d for the upper air inlet on the back side, and the attachment and reinforcement of required members are formed.

The main body casing 1 has, for example, a dimension La in the left-right longitudinal direction, a width Lb in the front-rear direction, and a height Lc in the vertical direction.
However, each is formed in a rectangular parallelepiped shape having a size that can be relatively easily carried into a general-purpose elevator for 12 to 13 passengers.

On the front side and the left and right side surfaces, as shown in the figure, the above-mentioned openings 1a, 1b,
A first heat exchanger 2 having a U-shaped cross section is provided to face 1c and extends in the entire vertical direction from the lower side bottom plate portion 1f to the upper side top plate portion 1e.

Further, on the inner bottom plate portion 1f, as shown in the drawing, for example, a machine installation portion as a service space is provided near the back surface thereof, and the machine installation portion is provided with, for example, a compressor. 6 and various mechanical devices such as accumulators, connecting pipes, connecting valves, and electrical equipment boxes 7 are arranged with a good space factor so that they can be easily inspected and operated from the outside. The second heat exchanger 3 is provided facing the air inlet opening 1d.

As described above, the heat exchangers are provided on the four sides of the front side, the left and right side sides, and the back side, and are surrounded by the same heat exchangers 2 (2a, 2b, 2c) and 3. At the uppermost portion (position of the top plate portion 1e) of the outdoor unit main body casing 1, two first and second blower fans 4 and 5 are arranged side by side in the longitudinal direction.

In the case of this embodiment, the first and second blower fans 4 and 5 have bell mouth portions 4a and 4b, respectively.
Each of the first and second heat exchangers 2 (2a, 2b, 2c), 3 is provided by arranging 5a on the upper end surface portions of the first, second heat exchangers 2, 3 and installing them. The upper end is also effectively ventilated, and this part is also made to contribute to heat exchange as effectively as possible.

Further, the first heat exchanger 2 and the second heat exchanger 3 are respectively the outdoor unit main body casing 1 as shown in the drawing.
Spaces for disposing the first and second refrigerant distribution header portions 8, 9 and the refrigerant pipes 10, 10a, 10b are provided in the corner portion on the left and right sides (the left side when viewed from the rear in the figure) of the rear portion, Using the same space, the refrigerant pipe 10 from one common compressor 6 provided in the machine installation section
However, as shown in the drawing, the first and second refrigerant pipes 10a, 10b
Are connected to the corresponding first and second refrigerant distribution headers 8 and 9, respectively.

As described above, the outdoor unit for an air conditioner according to Embodiment 1 of the present invention is located on the front side and the left and right side both sides of the outdoor unit main body casing 1 and extends from the bottom to the top. A first heat exchanger 2 having a U-shaped cross-section that extends and first and second air-intakes located above the outdoor unit main body casing 1 and sucking air through the first heat exchanger 2 having a U-shaped cross-section.
In the outdoor unit for an air conditioner including the blower fans 4 and 5, the second heat exchanger 3 is provided on the rear side of the upper part of the air conditioner body casing 1.
The lower side of the outdoor unit main body casing 1 where the service space, such as the machine installation section, has a three-sided suction structure, while the upper side has a four-sided suction structure.

In the case of such a construction, the outdoor unit having the three-sided suction structure on the front side and the left and right sided sides only by the first heat exchanger 2 having a U-shaped cross section in the whole from the bottom to the top in the past. The second heat exchanger 3 is newly provided by utilizing the remaining one surface of the rear side on the upper side of the main body to effectively expand the heat exchange area and greatly increase the heat exchange capacity. Therefore, even if the heat exchange area is increased, the dimensions (La × Lb × Lc) of the outdoor unit main body do not increase, and the outdoor unit remains compact.

Further, as a result of this, four sides are sucked in the vicinity of the first and second blower fans 4 and 5, so that the flow velocity distribution of the air on each side of the four sides of the heat exchanger is made uniform and uneven flow is eliminated. , The pressure loss inside the machine is also reduced, and the blast noise is also reduced.

Therefore, they also improve the heat exchange performance. Therefore, it becomes possible to effectively bring out the maximum heat exchange capacity within the maximum heat exchange area corresponding to a certain size of the outdoor unit body, and low noise with an appropriate air volume corresponding to that capacity. It is possible to enable highly efficient operation.

Further, in the above construction, the second heat exchanger 3 on the rear surface side is the first heat exchanger 2 on the front surface and the left and right side surfaces.
It is a heat exchanger with a flat plate structure independent of.

Therefore, its manufacture, mounting and installation are easy, and the above heat exchange performance improving action can be effectively realized by the heat exchanger 3 having the same flat plate structure. , The second heat exchangers 2, 3 are
Refrigerant is commonly supplied to each of them via one compressor 6.

Therefore, one compressor is sufficient, and the connecting work of the refrigerant pipe 10 and the like is easy.

Generally, in an outdoor unit, a plurality of types of capacities (number of horsepower) are used for the purpose of cost reduction by sharing parts.
There is a case where the outdoor units of the above are configured in the same casing.
Even in such a case, according to the above configuration, the capacity (number of horsepower) can be arbitrarily changed depending on the presence or absence of the second heat exchanger, and the capacity can be easily changed (set) ( When the capacity is high, the first and second heat exchangers 2 and 3 are used.
When the capacity is low, only the first heat exchanger 2 is used).

(Second Embodiment) Next, FIG. 3 shows the configuration of an outdoor unit for an air conditioner according to a second embodiment of the present invention.

In this embodiment, the outdoor unit of the above-mentioned Embodiment 1 is provided with one compressor 6 as the first and second heat exchangers 2, 2.
3 is commonly used, the first and second two independent dedicated compressors 6A, 6 are used according to their heat exchange capacity.
B is provided, and the refrigerant is supplied and circulated individually to each of the first and second heat exchangers 2 and 3 via independent refrigerant pipes 11 and 12, respectively.

According to this structure, the first and second
Since the first and second two compressors 6A and 6B are individually installed correspondingly to the heat exchangers 2 and 3, respectively, the refrigerant pipes 11, 12 and other connections are required individually. However, it is possible to reliably supply a stable amount of the refrigerant while preventing the uneven flow thereof, and it is possible to perform stable operation.

(Embodiment 3) FIGS. 4 and 5 show the configuration of an outdoor unit for an air conditioner according to Embodiment 3 of the present invention.

In the configuration of the outdoor unit according to the first embodiment described above,
The first and second blower fans 4 and 5 are installed near the upper end surfaces of the first and second heat exchangers 2 and 3, and the first and second heat exchangers 2 and 3 are installed. Although the vicinity of the upper end of the casing is also effectively contributed to the heat exchange, if this is done, the height of the upper part of the main body casing 1 will be partly increased, and the compactness will be poor and the appearance will be deteriorated, and the packing property will be reduced. Also, it is not easy to handle during transportation.

Therefore, in order to improve such a point, for example, as shown in FIGS. 4 and 5, the upper end of the bell mouth 4a including the bell mouth is below the top plate 1e surface position of the main body casing 1. It will be installed by embedding up to. With this configuration, and considering the outdoor unit having the same casing height, the height of the heat exchanger can be increased correspondingly, and the heat exchange performance is also improved.

(Fourth Embodiment) Further, FIG. 6 and FIG.
[Fig. 4] shows a configuration of an outdoor unit for an air conditioner according to Embodiment 4 of the present invention.

In the configuration of the outdoor unit according to this embodiment, the outdoor unit having the configuration according to the first embodiment employs an independent flat plate heat exchanger as the second heat exchanger 3. In the second heat exchanger 3, the above-mentioned first heat exchanger 2 having a U-shaped cross section is divided into upper and lower two-stage structures 2A and 2B, and left and right side portions 2b of the upper heat exchanger 2A. , 2c, one of 2c is extended and bent to be integrally formed.

In the case of such a configuration, the first embodiment described above
3 to 3, new refrigerant pipes 10b and 12 can be omitted, and a heat exchanger similar to those of the above-described first to third embodiments can be configured with only one refrigerant pipe 10. Therefore, the assembly in the manufacturing process becomes easy. Moreover, it is possible to efficiently obtain the same effects as those of the first to third embodiments.

Of course, in the structure of the present embodiment, it is possible to adopt a blower fan-embedded installation structure as in the fourth embodiment, for example.

(Fifth Embodiment) Further, FIG. 8 and FIG.
[Fig. 4] shows a configuration of an outdoor unit for an air conditioner according to Embodiment 5 of the present invention.

The configuration of the outdoor unit of this embodiment is characterized in that the outdoor unit of the same configuration as that of the above-mentioned Embodiment 1 is constructed by using only one blower fan 4.

Even in the case of such a structure, by combining the above-mentioned first heat exchanger 2 having a U-shaped cross section with the second heat exchanger 3 having the flat plate structure, conventionally, from the bottom to the top. Up to the remaining one rear side on the upper side of the outdoor unit main body, which had a three-sided suction structure on the front side and both left and right sides by only the first heat exchanger 2 having a U-shaped cross section A heat exchange surface can be newly formed, and the total heat exchange area and heat exchange capacity can be effectively increased.
Moreover, even if the heat exchange area is expanded in such a manner, the size (La × Lb × Lc) of the outdoor unit main body does not increase and remains compact unless the size of the first heat exchanger 2 is increased. .

Correspondingly to this, since the four blowers are sucked in the vicinity of the one blower fan 4, the flow velocity distribution of the air on each part of the four faces of the heat exchanger is made uniform and the uneven flow is further eliminated, and the inside of the machine is reduced. Pressure loss is also reduced and blast noise is reduced.

Therefore, they also improve the heat exchange performance. Therefore, it becomes possible to effectively bring out the maximum heat exchange capacity within the maximum heat exchange area corresponding to a certain size of the outdoor unit body, and low noise with an appropriate air volume corresponding to that capacity. It is possible to enable highly efficient operation.

The main body casing 1 in this embodiment is formed in a vertically long rectangular parallelepiped shape which is slightly long in the left-right direction as a whole and has a considerable height in the vertical direction.

(Sixth Embodiment) FIG. 10 shows the structure of an outdoor unit for an air conditioner according to a sixth embodiment of the present invention.

In the construction of the outdoor unit of this embodiment, when the same outdoor unit is constructed by using only one blower fan 4 as in the case of the above-mentioned Embodiment 5, the dimensions in the left, right, front and rear directions thereof. It is characterized in that La and Lb are substantially equal.

In the case of such a configuration, the flow velocity distribution of the air flow on the surface portion of the heat exchanger 4 by the one blower fan 4 is made more uniform, and the heat exchange performance is improved more effectively.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal configuration of an outdoor unit for an air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing an external configuration of the outdoor unit.

FIG. 3 is a perspective view showing an internal configuration of an outdoor unit for an air conditioner according to Embodiment 2 of the present invention.

FIG. 4 is a perspective view showing an internal configuration of an outdoor unit for an air conditioner according to Embodiment 3 of the present invention.

FIG. 5 is a perspective view showing an external configuration of the outdoor unit.

FIG. 6 is a perspective view showing an internal configuration of an outdoor unit for an air conditioner according to Embodiment 4 of the present invention.

FIG. 7 is a perspective view showing an external configuration of the outdoor unit.

FIG. 8 is a perspective view showing an external configuration of an outdoor unit for an air conditioner according to Embodiment 5 of the present invention.

FIG. 9 is a perspective view showing the internal configuration of the outdoor unit with the main body casing removed.

FIG. 10 is a perspective view showing an external configuration of an outdoor unit for an air conditioner according to Embodiment 6 of the present invention.

[Explanation of symbols]

Reference numeral 1 is a main casing, 1a to 1d are openings for air inlets, 1e is a top plate portion, 1f is a bottom plate portion, 2 is a first heat exchanger, 3 is a second heat exchanger, and 4 is a first heat exchanger. The blower fan 5 is a second blower fan, and 6, 6A and 6B are compressors.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kanji Akai             1304 Kanaoka-cho, Sakai City, Osaka Prefecture Daikin Industries             Sakai Plant Kanaoka Factory (72) Inventor Seiji Sato             1304 Kanaoka-cho, Sakai City, Osaka Prefecture Daikin Industries             Sakai Plant Kanaoka Factory F-term (reference) 3L054 BA05 BB03

Claims (5)

[Claims] 1. A first heat exchanger (2) having a U-shaped cross section, which is located on the front side and the left and right side both sides of the outdoor unit main body (1) and extends from the bottom to the upper side, and the outdoor side. A blower fan (4) located at the upper part of the machine body (1) for sucking air through the first heat exchanger (2) having a U-shaped cross section,
(5) In the outdoor unit for an air conditioner, the outdoor unit main body is provided by providing a second heat exchanger (3) located on the back side of the upper part of the air conditioner main body (1). An outdoor unit for an air conditioner, wherein the upper part of (1) has a four-sided suction structure. 2. The air conditioner according to claim 1, wherein the second heat exchanger (3) is a heat exchanger having a flat plate structure independent of the first heat exchanger (2). Outdoor unit. 3. The second heat exchanger (3) divides the first heat exchanger (2) into upper and lower two-stage structures (2A) and (2B),
The upper-stage heat exchanger (2A) is configured by extending and bending one of the left and right side portions of the heat exchanger (2A).
The outdoor unit for the air conditioner described. 4. The first and second heat exchangers (2), (3) are configured to be commonly supplied with a refrigerant via one compressor (6). Claims 1 and 2 characterized
Or the outdoor unit for an air conditioner described in 3. 5. Two compressors (6A) and (6B) corresponding to the first and second heat exchangers (2) and (3), respectively.
The outdoor unit for an air conditioner according to claim 1, wherein the refrigerant is individually supplied via the air conditioner.