JPH09229422A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor device in which various kinds of equipment constituting a refrigerant circuit such as a heat exchanger or a compressor or an accumulator or the like are efficiently stored within a main body of the outdoor device when a large volume of the outdoor device is set and further the stored equipment can be efficiently repaired and maintained. SOLUTION: The unit is provided with two U-shaped heat exchangers 29, 31, openings 39a, 31a of these heat exchangers 29, 31 are oppositely faced to each other, the two heat exchangers 29, 31 are stored in a main body of an outdoor device 1 and then the remaining devices (for example, accumulater) such as compressors 15, 17 and 19 or the like constituting the refrigerant circuit are stored in a space enclosed by the two heat exchangers 29, 31.

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 in a separation type air conditioner.

[0002]

2. Description of the Related Art Generally, a separation type air conditioner in which an outdoor unit is connected to a single or a plurality of indoor units is known. In this type, when increasing the required design horsepower, it is common to increase the number of outdoor units and connect a plurality of these units to form a so-called multi-type air conditioner.

However, when the horsepower required for design is increased to construct an efficient air conditioning system, it is better to increase the horsepower of one outdoor unit instead of increasing the number of the outdoor units. There are good cases.

[0004]

However, conventionally,
An outdoor unit in a separation type air conditioner having too much horsepower has not been proposed. When attempting to increase the capacity of the outdoor unit, the number of compressors mounted will increase, and the capacity of the heat exchanger, accumulator, etc. will increase, but in the past, various devices that make up these refrigerant circuits were No device has been proposed for efficiently storing the outdoor unit in the main body of the outdoor unit and effectively performing maintenance of the accommodated devices.

Therefore, an object of the present invention is to efficiently accommodate various devices constituting a refrigerant circuit such as a heat exchanger, a compressor and an accumulator in the body of the outdoor unit when the outdoor unit has a large capacity. However, it is another object of the present invention to provide an outdoor unit capable of effectively maintaining the accommodated devices.

[0006]

The invention according to claim 1 has two heat exchangers formed in a substantially U-shape, and the opening sides of these heat exchangers are made to face each other so that the two heat exchangers are opposed to each other. The heat exchanger is housed in the main body of the outdoor unit, and the remaining devices such as a compressor forming the refrigerant circuit are housed in the space surrounded by the two heat exchangers. .

According to a second aspect of the present invention, there are two heat exchangers formed in a substantially U shape, and the two heat exchangers are arranged so that the opening sides of these heat exchangers face each other and the two heat exchangers are placed in an outdoor unit. The remaining equipment such as a compressor, which is housed in the body of the refrigerant circuit and constitutes a refrigerant circuit, is housed in a space surrounded by the two heat exchangers, and a service panel and And / or a pipe connecting portion is provided.

According to a third aspect of the present invention, the heat exchanger has two heat exchangers formed in a substantially U shape, and the two heat exchangers are arranged so that their opening sides face each other. The rest of the equipment, such as a compressor, which is housed in the body of the outdoor unit and constitutes the refrigerant circuit, is housed in the space surrounded by the two heat exchangers, and heat exchange is performed on both sides of the front surface of the body of the outdoor unit. And a service panel and / or a pipe connecting portion are provided at the center of the front surface of the main body.

According to a fourth aspect of the present invention, the heat exchanger has two heat exchangers formed in a substantially U shape, and the two heat exchangers are arranged so that their opening sides are opposed to each other and the two heat exchangers are connected to each other as an outdoor unit. The remaining units such as a compressor, which is housed in the main body of the refrigerant circuit and constitutes a refrigerant circuit, is housed in a space surrounded by the two heat exchangers, and a flow distributor connected to the heat exchanger is connected to the outdoor unit. Of the outdoor unit, and a service panel and / or a pipe connecting portion is provided in the center of the front surface of the main body of the outdoor unit.

According to a fifth aspect of the present invention, in the first to fourth aspects, when the service panel is opened, the compressor is exposed on the front surface of the main body of the outdoor unit. To do.

According to a sixth aspect of the present invention, in the first to fourth aspects, a plurality of the compressors are provided, and when the service panel is opened, most of the plurality of compressors are opened. The compressor, which is operated and controlled for a long time, is exposed to the front of the front surface of the main body of the outdoor unit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an outdoor unit for an air conditioner according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is 20 horsepower (hereinafter referred to as "p
s ". ) Indicates an outdoor unit (hereinafter simply referred to as “parent unit”), and 3 indicates an outdoor unit of 10 ps (hereinafter simply referred to as “child unit”). As shown in FIG. 4, these parent and child units 1 and 3 are connected to an indoor unit 51 through a refrigerant pipe 50.

The "parent unit" 1 will be explained. As shown in FIG. 4, the parent unit 1 includes three compressors, that is, a rated compressor (scroll) 15 of 10 ps and five compressors.
It has a ps rated compressor (rotary) 17 and a compressor equipped with a power control mechanism (hereinafter referred to as “P / C compressor”) 19. This "P / C compressor" 1
9, the P / C compressor 19 has a control port 19a, and when the high pressure valve 19b is opened and a high pressure is applied to the control port 19a (valve 19c is closed), an internal power control mechanism (Fig. The P / C compressor 19 is operated at full power of 5 ps by operating a not shown). On the other hand, when the low pressure valve 19c is opened and a low pressure is applied to the control port 19a (valve 19b is closed), the internal power control mechanism (not shown) is also activated, and the P / C compressor 19 operates at 2.5 ps. It is operated at half power.

Further, the "parent unit" 1 includes, in addition to the three compressors 15, 17, and 19, an accumulator 23, an oil separator 25, a four-way valve 27, and two heat exchangers 2.
9, 31, pressure reducing devices 30, 32, a receiver tank 33, and the like. Reference numeral 34 is an oil line, which is connected to the balance pipe 36. Reference numeral 26 is an external save valve.

The "child unit" 3 is, as shown in FIG.
Accumulator 52, rated compressor 53, four-way valve 54, heat exchanger 55, pressure reducing device 56, and receiver tank 5
It has 7 mag. The rated compressor 53 is 10 ps. In addition, the parent unit 1 and the child unit 3 configured in this way
As described above, the indoor unit 51 is connected via the inter-refrigerant 50. The decompressor 58 and the heat exchanger 59 are built in the indoor unit 51.

According to this embodiment, the total horsepower of the three compressors 15, 17, 19 in the parent unit 1 is 20.
Since it is ps, the capacities of the two heat exchangers 29 and 31 in the parent unit 1 are also 20 ps each, which is 10 ps.

The total of 20 ps is larger than the conventional one. As shown in FIG. 2, the two heat exchangers 29 and 31 are formed in a generally U-shape (almost the same as the conventional one), and the two heat exchangers 29 and 31 are the same as the parent unit 1.
The openings 29a and 31a are arranged in the main body 10 so as to face each other.

The two heat exchangers 29 and 31 are symmetrical to each other, and are molded separately from each other, and are housed exactly in both corners 10a and 10a of the main body 10 of the parent unit 1. And
In the space 100 surrounded by the two heat exchangers 29 and 31, three compressors 1 for configuring the above-mentioned refrigerant circuit are provided.
5, 17, 19, accumulator 23, oil separator 25, four-way valve 27 and the like are housed. A suction port 35 for taking in air for heat exchange is provided around the side surface of the main body 10 of the parent unit 1 except for the central portion of the front surface of the main body.
Are formed all over. In addition, these suction ports 35
The air taken in is heat-exchanged by the two heat exchangers 29 and 31, and is then discharged through the discharge fan 37 provided on the ceiling surface.

In the center of the front surface of the main body of the parent unit 1, FIG.
As shown in, the service panel 39 and the pipe connection portion 41 of the refrigerant pipe are exposed. The pipe connection portion 41 is composed of service valves for gas pipes and liquid pipes.

In the pipe connection portion 41, the service valve (thin pipe) 41a for the liquid pipe is replaced by the service valve (thick pipe) for the gas pipe.
They are arranged in a line vertically so that they are higher than 41b. By arranging each of the service valves 41a and 41b in a line in the vertical direction, compared to the one arranged in a line in the horizontal direction (conventional),
The size of the parent unit 1 in the width direction can be reduced. The service valve (thick pipe) 41b of the gas pipe is arranged in the lower position in order to facilitate the connection of the gas pipe drawn out from the four-way valve 27. Since the connecting portion of the gas pipe of the four-way valve 27 is downward (not shown), it is difficult to draw the gas pipe drawn from the connecting portion of the four-way valve 27 in the parent unit 1 to the upper position, and thus the lower pipe. This is because if it is routed to, the connection will be easy.

When the service panel 39 is opened, the compressors 15, 17, and 19 are exposed there, as shown in FIG. In the air conditioner described above, the P / C compressor 19 is most preferentially operated for a long time as compared with 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 usually used.
Is generally maintained frequently.

Therefore, considering this maintainability,
The P / C compressor 1 is located closest to the front of the main body of the parent unit 1.
The P / C compressor 19, the compressor 17, and the compressor 15 are arranged in this order from the front side so that 9 is exposed.

Further, 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 arranged on the rear surface side of the main body. By arranging the flow 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 made wider than in the case where the flow divider 45 is arranged on the front surface side of the main body. According to this embodiment, when the service panel 39 is opened, the degree of exposure of the compressor and the like is high, and therefore maintainability can be improved.

A service / maintenance passage 46 is required between the air conditioner body 10 and the wall surface 47. Due to the presence of this passage 46, the suction port 3 on the front side of the main body
A sufficient suction space is secured in the vicinity of 5.

In short, according to this embodiment, even if the heat exchangers 29 and 31 are enlarged, the heat exchangers 29 and 31 are formed in a substantially U-shape, and the heat exchangers 2 and 3 are formed.
If the two heat exchangers are accommodated in the main body 10 of the parent unit 1 with the opening sides of 9, 31 facing each other, the remaining equipment such as the compressor that constitutes the refrigerant circuit is composed of two heat exchangers. Since it can be housed in the enclosed space, the parent unit 1 can be designed compactly. Further, 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 perform maintenance of the devices that form the refrigerant circuit, and thus maintainability can be improved.

[0027]

According to the present invention, two heat exchangers are formed in a substantially U shape, and the opening sides of these heat exchangers are opposed to each other so that the two heat exchangers can be installed in the main body of the outdoor unit. Since it is accommodated, the remaining devices such as the compressor that configure the refrigerant circuit can be accommodated in the space surrounded by the two heat exchangers, so that the outdoor unit can be designed compactly. Further, since the service panel that can be opened and closed is provided in the central portion of the front side of the main body, it is possible to easily perform maintenance of the devices that form the refrigerant circuit.

[Brief description of 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 Exchangers 30, 32 Pressure reducing device 33 Receiver tank 39 Service panel 41 Piping connection 41a Liquid pipe service valve (narrow pipe) 41b Gas pipe service valve (thick pipe)

Claims (6)

[Claims] 1. A heat exchanger having two heat exchangers formed in a substantially U-shape, the opening sides of these heat exchangers being opposed to each other, and the two heat exchangers being accommodated in the main body of the outdoor unit, An outdoor unit for an air conditioner, characterized in that the remaining devices such as a compressor that constitute a refrigerant circuit are housed in a space surrounded by the two heat exchangers. 2. The heat exchanger comprises two heat exchangers 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. Remaining equipment such as a compressor that constitutes the refrigerant circuit is housed in a space surrounded by the two heat exchangers, and a service panel and / or a pipe connecting portion is provided in the center of the front surface of the main body of the outdoor unit. The outdoor unit of the air conditioner, which is characterized by 3. A heat exchanger having two heat exchangers formed in a substantially U-shape, the two heat exchangers being housed in the main body of the outdoor unit, with their opening sides facing each other. Remaining equipment such as a compressor that constitutes the refrigerant circuit is housed in a space surrounded by the two heat exchangers, and a suction port for heat exchange air is provided on both sides of the front surface of the main body of the outdoor unit. Formed,
An outdoor unit for an air conditioner, characterized in that a service panel and / or a pipe connection portion is provided in the center of the front surface of the main body. 4. Having two heat exchangers formed in a substantially U-shape, and housing the two heat exchangers inside the main body of the outdoor unit, with the opening sides of these heat exchangers facing each other, Remaining equipment such as a compressor that constitutes a refrigerant circuit is housed in a space surrounded by the two heat exchangers, and a flow divider connected to the heat exchanger is arranged on the rear surface side of the main body of the outdoor unit. ,
An outdoor unit for an air conditioner, characterized in that a service panel and / or a pipe connection portion is provided in the center of the front surface of the main body of the outdoor unit. 5. The outdoor unit for an air conditioner according to claim 1, wherein when the service panel is opened, the compressor is exposed on the front surface of the main body of the outdoor unit. 6. A plurality of 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 the front surface of the main body of the outdoor unit. The outdoor unit of the air conditioner according to any one of claims 1 to 4, wherein the outdoor unit is exposed to the front.