JPH05280766A - Outdoor unit for air-conditioning device - Google Patents

Abstract

PURPOSE:To provide an outdoor unit which improves heat-exchanging ability of a heat-exchanger on the outdoor side without damaging a compact property and space saving ability. CONSTITUTION:A heat-exchanger 2 on the outdoor side of an outdoor unit 20 employing a cross flow fan 3 as an outdoor fan comprises a first heat- exchanger part 30 disposed along a suction port part 13, adjoining to a discharge port 12, of a wall on the body side and a second heat-exchanger part coupled approximately in a V-shape to the heat-exchanger 30 and disposed in a manner to obliquely cross an air duct. In the heat-exchanger 2 on the outdoor side, this constitution prevents the exercise of an influence by which the size of a body 7 is increased, ensures a wide heat-exchange area though the heat- exchanger is arranged in one row, and provides high heat-exchanger performance as the compact property and space saving ability of an original outdoor unit 20 are maintained.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Air conditioners used at home include a separate type, that is, a type in which an indoor unit for installing the device indoors and an outdoor unit for installing the device are separated from each other.

Such air conditioners have a high tendency to be installed in apartment houses and other condominiums. Specifically, the indoor unit is installed on an indoor wall, the outdoor unit is placed on a veranda or the like, and both are connected by a refrigerant pipe through the wall.

By the way, in apartment houses, there is a strong demand for effectively utilizing the limited space of the veranda.

Therefore, recently, a vertical installation type outdoor unit has been developed which employs a cross flow fan as an outdoor fan and is excellent in compactness and space saving.

As shown in FIG. 3, this outdoor unit includes an outdoor heat exchanger 2, a cross-flow fan as an outdoor fan 3, a compressor 4, a four-way valve 5 for switching between heating and cooling, and an expansion valve 6 (pressure reducing device). It has a built-in configuration, and details are shown in Fig. 4.
The structure as shown in was adopted.

That is, 7 is a vertically long box-shaped main body having a rectangular cross section. A partition wall 8 is provided on the upper side of the main body 7, a machine room 9 is formed in an upper space portion of the main body 7 with the partition wall 8 as a boundary, and heat exchange is performed in the lower space portion. It constitutes the chamber 10. The main body 7 has a lower surface as an installation surface 11a and a rear surface as a surface 11b capable of being brought into close contact with the wall 11 or the like. Further, of the left side wall, the front side wall, and the right side wall of the main body 7 which are adjacent to each other and are continuous with each other, the right side wall portion forming the heat exchange chamber 10 is provided with the air outlet 12. Further, the remaining left side wall portion and the front wall portion which constitute the heat exchange chamber 10 have a suction port 1 formed by an opening extending between them.
3 is provided. An air passage 14 that connects the suction port 13 and the air outlet 12 is formed inside the main body 7.

Further, the cross-flow fan 3 is provided on the side of the outlet 12 in the main body 7, and an air passage forming a fan passage of the fan 3 along a direction perpendicular to the direction in which the outlet 12 and the suction port 13 are arranged. It is provided together with the wall 3a. The cross flow fan 3 is connected to the output shaft of a fan motor 15 installed in the machine room 9.

Inside the main body 7, there is provided an outdoor heat exchanger 2 which is bent into an L-shape so as to close the opening of the suction port 13. A nose portion 2b formed by assembling the path portion 2a of the outdoor heat exchanger 2 is provided at the end of the outdoor heat exchanger 2 on the outlet 12 side.

Then, in the open heat exchange chamber portion inside the outdoor heat exchanger 2, equipment other than the indoor heat exchanger 17 and the indoor fan 18 constituting the indoor unit 16 as shown in FIG. That is, the compressor 4, the four-way valve 5 for switching between heating and cooling, and the expansion valve 6 (pressure reducing device) are installed (only the compressor 4 is shown in FIG. 4), and the operation of the compressor 4 is controlled in the machine room 9. A device for doing so, for example, an electric box 19 incorporating a circuit such as an inverter circuit is installed.

By the way, such an outdoor unit 20 is
There is a strong demand for improving the heat exchange performance of the outdoor heat exchanger 2.

In order to deal with this, in the outdoor unit 20 of this type, as shown in FIG. 4, the outdoor heat exchanger 2 is arranged so as to block the suction port portion of the front wall. A flat second outdoor heat exchanger 21 is provided on the back surface of the longitudinal portion so as to form two rows of heat exchangers, thereby expanding the heat exchange area.

[0013]

However, the structure in which the outdoor heat exchangers 21 are arranged in two rows (a plurality of rows) is as follows.
In addition to the heat exchange performance, there is a problem that the original space saving property is impaired.

That is, for example, in the heating operation, when the outside air is taken into the air passage 14 by the operation of the cross-flow fan 3, it exchanges heat with the two outdoor heat exchangers 2 and 21 arranged in parallel, and the outdoor heat is exchanged. Although the refrigerant flowing through the exchangers 2 and 21 is evaporated, the heat transfer coefficient of the refrigerant in the outdoor heat exchanger 21 on the downstream side is lower than that of the outdoor heat exchanger 2 on the upstream side.

Specifically, when the evaporation temperature is constant and the temperature of the outside air is "5 ° C.", the outdoor heat exchanger 2 on the outside is provided.
Although heat exchange is performed with the outside air of "5 ° C", the outdoor heat exchanger 21 located inside performs heat exchange with the outside air temperature after the heat exchange, that is, the outside air having a temperature lower than "5 ° C". Be seen.

That is, this structure has a low heat exchange rate with respect to an increase in heat exchange area. Moreover, because the outdoor heat exchanger 21 is installed in parallel with the outdoor heat exchanger 2, the installation of the outdoor heat exchanger 21 itself increases the dimension of the main body 7 in the thickness direction (front-back direction). Become.

Therefore, more than the heat exchange performance is improved,
The outdoor heat exchanger 21 occupies a large proportion of the main body 7, and the outer shape of the main body 7 has to be made larger than the obtained capacity, so that the outdoor unit 20 is compact and space saving. There is an inconvenience that it is damaged by the influence of improving the performance.

The present invention has been made in view of such circumstances, and its purpose is to improve the heat exchange performance of the outdoor heat exchanger without impairing compactness and space saving. An object is to provide an outdoor unit of an air conditioner that can be enhanced.

[0019]

In order to achieve the above object, an outdoor unit of an air conditioner according to the present invention has an outdoor heat exchanger provided in a main body, a suction port on a side wall of a main body adjacent to an outlet. A first heat exchange layer portion arranged along the portion and a first heat exchange layer portion which are connected to each other in a substantially V-shape, and which is on the side opposite to the air outlet on the side wall of the main body. The second inside of the portion is arranged so as to diagonally cross the air passage.
And a heat exchange layer section of

[0020]

The outdoor unit of the air conditioner of the present invention, when the outside air is taken into the air passage by the operation of the cross flow fan,
Heat is exchanged with the refrigerant flowing through the first heat exchange layer section and the second heat exchange layer section.

At this time, since the second heat exchange layer portion is disposed so as to cross the air passage obliquely, the outdoor heat exchanger does not need to make the main body of the outdoor unit large and heat exchange is performed. The area will increase.

That is, the outdoor heat exchanger does not affect the size of the main body, and a large heat exchange area can be secured in one row.

Therefore, it becomes possible to solve the problem that the downstream side in the air flow direction is lowered as compared with the upstream side, such as the conventional two-row heat exchanger, and the same heat transfer to the outdoor heat exchanger. When it comes to performance, it requires a smaller heat exchange volume than a conventional two-row heat exchanger, and a small outdoor heat exchanger is sufficient.

That is, the heat exchanging property with respect to the increase of the heat exchanging area is considerably high, and a small increase of the heat exchanging area brings high heat exchanging performance. Therefore, the outdoor unit maintains the original compactness and space saving property. At the same time, high heat exchange performance can be obtained.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in FIGS.

Here, in FIG. 1 and FIG. 2, the same components as those described in the above-mentioned "Prior Art" are:
The same reference numerals are given and the description thereof is omitted, and in this section, different parts (main parts of the invention) will be described.

This embodiment is different in that the outdoor heat exchanger 2 having a substantially V-shape is adopted to improve the heat exchange performance.

That is, as shown in FIGS. 1 and 2, the outdoor heat exchanger 2 has a flat single layer heat exchanger portion 30 (provided on the inner surface of the front wall of the main body 7 forming the suction port 13). (Corresponding to a first heat exchange layer portion), and a flat single layer heat exchanger portion 31 (corresponding to a second heat exchange layer portion) connected to the heat exchanger portion 30 in a V shape. It consists of

More specifically, the heat exchanger section 30 is installed along the suction port portion of the main body 7 so as to close the suction port portion. At the right end of the heat exchanger portion 30, a nose portion 30a of the cross-flow fan 3, which is formed of a separate member, is provided unlike the conventional case. Also, the heat exchanger unit 30
The heat exchanger section 31 is connected to the left end of the V-shaped through a plurality of stages 32 of paths arranged in the up-down direction (direction perpendicular to the axis of the cross-flow fan 3). As a result, the heat exchanger portion 31 arranged at the suction port portion on the left side of the main body 7 is
It extends obliquely toward the air passage wall 3a side. That is, the heat exchanger portion 31 is arranged so as to cross the air passage 14 obliquely. By being arranged in this diagonal direction, the total length of the outdoor heat exchanger 2 is extended, and the heat exchange area is increased as compared with the conventional L-shaped outdoor heat exchanger.
In this embodiment, since the heat exchange performance due to the increase in the heat exchange area is considerably high, the heat exchanger portion 31 is a heat exchanger having a short height.

A compressor 4, a four-way valve 5 for switching between heating and cooling, and an expansion valve 6 (pressure reducing device) are installed on the bottom plate of the main body 7 surrounded by the heat exchanger 31 and the main body 7 (FIG. 1). ，
Only compressor 4 is shown in FIG. 4).

Further, in the path portion 32 connecting between the heat exchanger 30 and the heat exchanger 31, there are provided inlet / outlet portions 33 and 34 for engaging with the indoor unit 16, and the inlet / outlet portion 3
The refrigerant can be circulated to the outdoor heat exchanger 2 through 3, 34.

When the outdoor unit thus constructed is operated, the outside air is taken into the air passage 14 from the suction port 13 through the heat exchange sections 30 and 31 in accordance with the operation of the cross flow fan 3.

When this outside air passes through the heat exchange sections 30 and 31, it exchanges heat with the refrigerant flowing through the heat exchange sections 30 and 31 by the refrigeration cycle operation (heating cycle or cooling cycle).

Then, the outside air which has finished the heat exchange is the outlet 1
It is blown into the atmosphere from 2 and completes the heat exchange necessary for air conditioning operation.

At this time, the heat exchange performance of the outdoor heat exchanger 2 is enhanced by the installation of the heat exchange section 31.

Here, in the structure for increasing the heat exchanging area by connecting the heat exchanging portion 31 to the heat exchanging portion 30 to increase the heat exchanging area, which is adopted to enhance the heat exchanging property, the heat exchanging portion 31 is connected to the air passage 1
4, the outdoor heat exchanger 2 is different from the conventional two-row heat exchanger in structure so that the outdoor unit 20 does not need to be large in size and does not need to be large in size. The exchange area can be increased.

That is, the outdoor heat exchanger 2 can secure a wide heat exchange area in a row without affecting the main body 7.

Therefore, it becomes possible to solve the problem that the downstream side in the air flow direction is lower than the upstream side, as in the conventional two-row heat exchanger,
When the outdoor heat exchanger 2 has the same heat transfer performance, the heat exchange volume is smaller than that of the conventional two-row heat exchanger, and a small outdoor heat exchanger 2 is sufficient.

In other words, the heat exchanging property with respect to the increase of the heat exchanging area is considerably high, and a small increase of the heat exchanging area brings about high heat exchanging performance.

Therefore, the entire outdoor unit 20 can be made compact, and the outdoor unit 20 can obtain high heat exchange performance while maintaining the original compactness and space saving. Moreover, since the outdoor heat exchanger 2 is compact, the cost can be reduced.

In addition, the heat exchanger section 30 and the heat exchange section 31
By adopting a structure in which the passage portion 32 for circulating the refrigerant is assembled and the inlet / outlet portions 33, 34 are provided, the passage portion 32 does not interfere with the blowout flow of the cross flow fan 3, so Noise (abnormal noise) of the outdoor unit 20 caused
The advantage that can prevent the occurrence of.

[0042]

As described above, according to the present invention,
In an outdoor unit that employs a cross-flow fan, the heat exchange performance of the outdoor heat exchanger can be enhanced without impairing compactness and space saving.

Moreover, since the outdoor heat exchanger is compact, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an outdoor unit of an air conditioner of the present invention.

FIG. 2A is a plan sectional view of the outdoor unit. (B)
[Fig. 2] is a partially sectional front view of the outdoor unit.

[Fig. 3] Heater of an air conditioner to which the outdoor unit is applied
The figure which shows a top pump type refrigeration cycle.

FIG. 4A is a plan sectional view of an outdoor unit that employs a conventional cross-flow fan. FIG. 6B is a front view of the outdoor unit, which is partially cross-sectional.

[Explanation of symbols]

2 ... Outdoor heat exchanger, 2a ... Pass part, 3 ... Cross flow fan (outdoor fan), 7 ... Main body, 12 ... Blowout port, 13 ... Suction port, 14 ... Air passage, 20 ... Outdoor unit, 30 ... Heat exchange Heater part (first heat exchange layer part), 30a ... Nose part, 31 ... Heat exchanger part (second heat exchange layer part), 32 ... Pass part, 33,
34 ... Doorway.

Claims (1)

[Claims] 1. A blower outlet is provided on a side wall disposed on one side of three side walls that are continuously disposed adjacent to each other, and a suction inlet is provided on the remaining two side walls, and the blower outlet and the inside are provided. A box-shaped main body having an air passage communicating with the suction port is provided, an outdoor heat exchanger is provided in the main body, and the suction port and the blowout port are arranged side by side on the blowout port side in the main body. Is an outdoor unit of an air conditioner configured to provide a cross-flow fan along a right-angled direction, and according to the operation of the cross-flow fan, the outdoor air is circulated to the outdoor heat exchanger. A first heat exchange layer portion disposed along the suction port portion of the main body side wall, which is adjacent to the air outlet, and is connected to the first heat exchange layer portion in a substantially V shape. In the inside of the suction port portion of the main body side wall, which is on the side opposite to the air outlet, Outdoor unit of an air conditioner characterized by being composed of a second heat exchange layer portion disposed across the road at an angle.