JP3710874B2 - Air conditioner outdoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of an outdoor unit in a separation type air conditioner.
[0002]
[Prior art]
In general, a separation type air conditioner in which an outdoor unit and one or a plurality of indoor units are connected is known. In this type, when the required horsepower for design is increased, the number of the outdoor units is generally increased and a plurality of these units are connected to form a so-called multi-type air conditioner.
[0003]
However, it is sometimes better to increase the horsepower of one outdoor unit rather than increasing the number of outdoor units when trying to construct an efficient air conditioning system by increasing the required horsepower for design. is there.
[0004]
[Problems to be solved by the invention]
However, conventionally, an outdoor unit in a separate air conditioner having a very large horsepower has not been proposed. When trying to increase the capacity of outdoor units, the number of installed compressors will increase, and the capacity of heat exchangers, accumulators, etc. will increase, but in the past, various devices that make up these refrigerant circuits, No device has been proposed for efficiently accommodating the outdoor unit in the main body and effectively maintaining the accommodated devices.
[0005]
Therefore, an object of the present invention is to efficiently accommodate various devices constituting the refrigerant circuit such as a heat exchanger, a compressor, and an accumulator in the main body of the outdoor unit when the capacity of the outdoor unit is increased. An object of the present invention is to provide an outdoor unit capable of effectively maintaining the equipment stored therein.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a compressor that constitutes a refrigerant circuit by opposing the opening sides of two heat exchangers formed in a substantially U-shape so as to accommodate these heat exchangers in the main body of the outdoor unit. Etc. are accommodated in a space surrounded by the two heat exchangers, the two heat exchangers are brought close to each other on the back side of the main body of the outdoor unit, and are connected by a shunt. On the front side of the main body, two heat exchangers are separated from each other, and a service panel and a pipe connecting portion for connecting a refrigerant pipe connected to the heat exchanger are provided between the heat exchangers .
[0007]
The invention according to claim 2 is characterized in that, in the one according to claim 1, air intake ports for heat exchange are formed on both sides of the front surface of the main body of the outdoor unit .
[0008]
According to a third aspect of the present invention, in the first or second aspect, when the service panel is opened, the compressor is exposed on the front surface of the main body of the outdoor unit .
[0009]
According to a fourth aspect of the present invention, there is provided a plurality of the compressors according to the first or second aspect, and when the service panel is opened, the longest time among the plurality of compressors is reached. The compressor whose operation is controlled is exposed in front of the front surface of the main body of the outdoor unit .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an outdoor unit of an air conditioner according to the present invention will be described with reference to the accompanying drawings.
[0013]
In FIG. 1, 1 indicates an outdoor unit (hereinafter simply referred to as “parent unit”) having 20 horsepower (hereinafter referred to as “ps”), and 3 indicates an outdoor unit (hereinafter simply referred to as “child unit”) of 10 ps. ). These parent and child units 1 and 3 are connected to the indoor unit 51 through the refrigerant pipe 50 as shown in FIG.
[0014]
The “parent unit” 1 will be described. The parent unit 1 includes three compressors, that is, a rated compressor (scroll) 15 of 10 ps and a rated compressor (rotary) 17 of 5 ps, as shown in FIG. And a compressor (hereinafter referred to as “P / C compressor”) 19 having a power control mechanism. The “P / C compressor” 19 will be described briefly. The P / C compressor 19 has a control port 19a. When the high-pressure valve 19b is opened and a high pressure is applied to the control port 19a (the valve 19c is closed). ), An internal power control mechanism (not shown) is activated, and the P / C compressor 19 is operated at a full power of 5 ps. On the other hand, when the low pressure valve 19c is opened and a low pressure is applied to the control port 19a (the valve 19b is closed), an internal power control mechanism (not shown) is also activated, and the P / C compressor 19 is 2.5 ps. Operated with half power.
[0015]
Furthermore, in addition to the three compressors 15, 17, 19, the “parent unit” 1 includes an accumulator 23, an oil separator 25, a four-way valve 27, two heat exchangers 29, 31, decompression devices 30, 32, a receiver. A tank 33 and the like are included. Reference numeral 34 denotes an oil line, which is connected to the balance pipe 36. 26 is an external save valve.
[0016]
As shown in FIG. 4, the “child unit” 3 includes an accumulator 52, a rated compressor 53, a four-way valve 54, a heat exchanger 55, a pressure reducing device 56, a receiver tank 57, and the like. The rated compressor 53 is 10 ps. The indoor unit 51 is connected to the parent unit 1 and the child unit 3 configured as described above through the refrigerant 50 as described above. The indoor unit 51 includes a decompression device 58 and a heat exchanger 59.
[0017]
According to this embodiment, since the total horsepower of the three compressors 15, 17, 19 in the parent unit 1 is 20 ps, the capacities of the two heat exchangers 29, 31 in the parent unit 1 are also 10 ps each. The total is 20 ps.
[0018]
The total 20 ps is larger than the conventional one. As shown in FIG. 2, the two heat exchangers 29 and 31 are formed in a substantially U shape (substantially the same as the conventional one), and the two heat exchangers 29 and 31 are the same as those of the parent unit 1. It arrange | positions so that each opening 29a, 31a may be opposed in the main body 10. FIG.
[0019]
The two heat exchangers 29 and 31 are the left and right objects, are completely formed separately, and are closely accommodated in both corners 10a and 10a of the main body 10 of the parent unit 1. In the space 100 surrounded by the two heat exchangers 29 and 31, there are three compressors 15, 17, and 19, an accumulator 23, an oil separator 25, and a four-way valve for constituting the refrigerant circuit described above. 27 etc. are accommodated. Around the side surface of the main body 10 of the parent unit 1, a suction port 35 for taking in air for heat exchange is formed all over the center of the front surface of the main body 1. In addition, the air taken in from these suction ports 35 is discharged through a discharge fan 37 provided on the ceiling surface after heat exchange is performed by the two heat exchangers 29 and 31.
[0020]
As shown in FIG. 3, a service panel 39 and a refrigerant pipe connection part 41 face the center of the front surface of the main unit 1. This pipe connection part 41 is comprised by each service valve etc. of a gas pipe and a liquid pipe.
[0021]
In the pipe connection part 41, the service valve (thin tube) 41a of the liquid pipe is arranged in a vertical row so as to be higher than the service valve (thick pipe) 41b of the gas pipe. By arranging the service valves 41a and 41b in a single vertical row, the dimension in the width direction of the parent unit 1 can be made smaller than those arranged in a horizontal row (conventional). The reason why the gas pipe service valve (thick pipe) 41b is arranged at the lower position is to make it easy to connect the gas pipe drawn from the four-way valve 27. Since the connecting part of the gas pipe of the four-way valve 27 faces downward (not shown), it is difficult to draw the gas pipe drawn out from the connecting part of the four-way valve 27 in the parent unit 1 to the upper side, and therefore the lower part. This is because the connection is facilitated if it is routed around.
[0022]
When the service panel 39 is opened, as shown in FIG. 2, the compressors 15, 17 and 19 are exposed there. In the air conditioner described above, the P / C compressor 19 is most preferentially operated over a long period of time compared to the other compressors 15 and 17 in terms of operation control. Therefore, when compared with the other compressors 15 and 17, the P / C compressor 19 is generally maintained frequently.
[0023]
Therefore, considering this maintainability, the P / C compressor 19, the compressor 17, and the compressor 15 are arranged from the front side so that the P / C compressor 19 is exposed in front of the front surface of the main unit 1. Arranged in order.
[0024]
Moreover, in the main body 10 of the parent unit 1, as shown in FIG. 2, the flow divider 45 connected to the heat exchangers 29 and 31 is disposed on the back side of the main body. By disposing the current divider 45 on the back surface side of the main body in this way, the opening space S on the front surface side of the main body can be widened as compared with the case where the current divider 45 is disposed on the front surface side of the main body. According to this embodiment, when the service panel 39 is opened, since the degree of exposure of the compressor or the like is high, the maintainability can be improved.
[0025]
Further, a service / maintenance passage 46 is required between the air conditioner body 10 and the wall surface 47. The presence of the passage 46 ensures a sufficient suction space in the vicinity of the suction port 35 on the front side of the main body.
[0026]
In short, according to this embodiment, even if the heat exchangers 29 and 31 are enlarged, the respective heat exchangers 29 and 31 are formed in a substantially U shape, and the openings of these heat exchangers 29 and 31 are formed. If the two heat exchangers are accommodated in the main body 10 of the parent unit 1 with the sides facing each other, the remaining devices such as the compressor constituting the refrigerant circuit are placed in a space surrounded by the two heat exchangers. Since it can be accommodated, the parent unit 1 can be designed compactly. In addition, since the service panel 39 is provided in the central portion of the main body 10, by opening the service panel 39, it is possible to maintain the devices constituting the refrigerant circuit, so that maintainability can be improved.
[0027]
【The invention's effect】
According to this invention, two heat exchangers are formed in a substantially U shape, and the two heat exchangers are accommodated in the main body of the outdoor unit with the opening sides of these heat exchangers facing each other. Since the remaining devices such as the compressor constituting the refrigerant circuit can be accommodated in the space surrounded by the two heat exchangers, the outdoor unit can be designed compactly. In addition, since a service panel that can be opened and closed is provided at the front central portion of the main body, the devices constituting the refrigerant circuit can be easily maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of an outdoor unit according to the present invention.
FIG. 2 is a cross-sectional view of an outdoor unit (parent unit).
FIG. 3 is a front view of an outdoor unit (parent unit).
FIG. 4 is a refrigerant circuit diagram of the air conditioner.
[Explanation of symbols]
1 Outdoor (parent) unit 3 Outdoor (child) unit 15 Rated compressor (scroll)
17 Rated compressor (rotary)
19 Compressor (“P / C Compressor”)
23 accumulator 25 oil separator 27 four-way valve 29, 31 heat exchanger 30, 32 pressure reducing device 33 receiver tank 39 service panel 41 pipe connection part 41a liquid pipe service valve (narrow pipe)
41b Gas pipe service valve (thick pipe)

Claims (4)

The two heat exchangers formed in a substantially U shape are opposed to each other, the heat exchangers are accommodated in the main body of the outdoor unit, and the remaining devices such as a compressor constituting the refrigerant circuit are Housed in a space surrounded by two heat exchangers, two heat exchangers are connected in close proximity to each other on the back side of the main body of the outdoor unit, and two heat exchangers are connected on the front side of the main body of the outdoor unit. An outdoor unit for an air conditioner, characterized in that a service panel and a pipe connection part for connecting a refrigerant pipe connected to the heat exchanger are provided between the heat exchangers . 2. The outdoor unit of an air conditioner according to claim 1, wherein air intake ports for heat exchange are formed on both sides of the front surface of the main body of the outdoor unit. The outdoor unit of an air conditioner according to claim 1 or 2, wherein when the service panel is opened, the compressor is exposed on a front surface of the main body of the outdoor unit. A plurality of the compressors are provided, and when the service panel is opened, the compressor whose operation is controlled for the longest time among the plurality of compressors is exposed to the foremost side of the front surface of the main body of the outdoor unit. The outdoor unit of an air conditioner according to claim 1 or 2 , wherein the outdoor unit is an air conditioner.

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