JP3060241B2 - Outdoor unit for room air conditioner - Google Patents

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 a room air conditioner.

[0002] In this specification, the term aluminum is used to mean not only pure aluminum but also aluminum alloy.

[0003]

2. Description of the Related Art Conventionally, in a refrigerating cycle used for a room air conditioner, an evaporator connected to one condenser provided in an outdoor unit is provided in a plurality of indoor rooms. The casing of the outdoor unit was equipped with a so-called distributor for distributing the liquid refrigerant from the condenser and sending it to the evaporators in a plurality of rooms.

[0004]

However, conventionally, since a distributor made as a separate component is provided in the casing of the outdoor unit, the number of parts is large, the manufacturing cost of the outdoor unit is high, and the unit is not provided. There is a problem that the weight of the device increases.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, in which a liquid refrigerant distribution section can be integrally provided in a part of a casing, so that the number of parts can be significantly reduced, and Unit manufacturing costs are low,
Another object of the present invention is to provide an outdoor unit for a room air conditioner, which can reduce the weight of the unit.

[0006]

In order to achieve the above object, the present invention comprises a casing, and a condenser housed in the casing and connected to a plurality of indoor evaporators via pipes. An outdoor unit for a room air conditioner, wherein at least a part of a casing is made of a metal laminated plate, one end of which is opened at an edge of the metal laminated plate, and the condenser and the piping are connected to each other. A liquid refrigerant introduction tubular bulging portion connected through a pipe, and a liquid refrigerant discharging tubular bulging portion each having one end opened to the edge of the metal plate and connected to the evaporator via a pipe. An outdoor unit for a room air conditioner, in which a liquid refrigerant distribution part comprising a liquid refrigerant introduction tubular bulge and a liquid refrigerant discharge tubular bulge is interconnected. Abstract It is.

[0007] In the above, the metal laminated plate is, for example, one of two metal plates, such as an aluminum plate, is printed on one surface of one of the metal plates with an anti-pressing agent in a required pattern, and the other metal plate is printed on this surface. Is manufactured by a so-called roll bonding method, in which a plywood having a non-pressed portion is formed by press-bonding, and all tubular bulges are formed at once by introducing fluid pressure into the non-pressed portion of the plywood, or One metal plate is press-formed to form all tubular bulges and corresponding recesses, and the other metal plate is seam-welded to this metal plate around the recess. Is done. In addition, the manufacturing method of a metal laminated plate is not limited to these.

[0008]

According to the above outdoor unit for a room air conditioner,
At least a part of the casing is made of a metal plate, and a liquid refrigerant distribution unit is integrally formed on the metal plate. Here, the liquid refrigerant distribution section includes one liquid refrigerant introduction tubular expansion section, the same number of liquid refrigerant discharge tubular expansion sections as the evaporators installed in the indoor room, and a connection connecting these to each other. The liquid refrigerant introduced from the condenser into the liquid refrigerant introduction tubular expansion part of the distribution part from the condenser passes through the connection tubular expansion part, and the liquid refrigerant discharge tubular expansion part. From which it is distributed to each indoor evaporator.

As described above, in the present invention, since the liquid refrigerant distribution portion is integrally formed on the metal ply plate constituting at least a part of the casing, the number of parts is small.
Manufacturing costs of outdoor units are low. Further, since the number of parts is small, the weight of the unit can be reduced.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

1 to 3 showing a first embodiment of the present invention, an outdoor unit for a room air conditioner according to the present invention comprises a casing (1) and three indoor rooms housed in the casing (1). A condenser (2) connected to the evaporator (3) via a pipe. The left side wall (1a) of the casing (1) of the outdoor unit is made of a metal laminated plate (4) made of an aluminum roll bond panel.

The left side wall of the casing made of a metal laminated plate (4)
In the first half of (1a), a liquid refrigerant distribution part (10) is formed, and in the second half of the left side wall (1a), a gaseous refrigerant merging part (20) is formed.

Here, one end of the liquid refrigerant distribution section (10) is opened at the front edge of the metal ply plate (4) and is connected to the condenser (2) via a pipe. Tubular bulge for liquid refrigerant discharge, and a tubular bulge for discharging a liquid refrigerant connected to the three evaporators (3) via pipes, each end being open at the front edge of a metal ply plate (4). Part (6), these tubular bulges for liquid refrigerant introduction (5) and tubular bulges for liquid refrigerant discharge (6)
And a connecting tubular bulging portion (7) for connecting the members to each other.

A joint member (18) with a valve for connecting a pipe (12) from the evaporator (3) is attached to an opening of the tubular bulging portion (5) for introducing a liquid refrigerant. At the opening of the discharge tubular bulge (6), a pipe (11) extending to the evaporator (3)
And a joint member (19) with a valve for connecting the two.

The gaseous refrigerant merging portion (20) has one end opened at the rear edge of the metal ply plate (4) and the three evaporators.
(3) and three tubular bulging portions (15) for introducing a gaseous refrigerant, which are connected to each other via a pipe (13); (8) and one tubular bulge (16) for discharging gaseous refrigerant connected via a pipe (14), and these tubular bulges (15) for introducing gaseous refrigerant and for discharging gaseous refrigerant. The tubular bulging portion (16) comprises a communicating and silencing tubular bulging portion (17) for connecting the tubular bulging portions (16) to each other.

As shown in FIG. 2, the portion of the tubular bulging portion (15) for communicating and silencing communicating with the distal end of the tubular bulging portion (15) for introducing gaseous refrigerant is reduced to two or three as shown in FIG. Branched. This branch is indicated by (17a). Therefore, two or three branch portions connected to the tubular bulges (15) for introducing the gaseous refrigerant in the tubular bulge (17) for communication and silencing.
The total cross-sectional area of the passage (17a) is larger than the cross- sectional area of each gaseous refrigerant introduction tubular bulging portion (15). Depart (15)
The sound that flows into the inside can be muted.

A joint member (21) for connecting a pipe (13) from an evaporator (3) is attached to an opening of each tubular bulging portion (15) for introducing a gaseous refrigerant. A joint member with a valve (22) for connecting a pipe (14) extending to the compressor (8) is attached to an opening of the discharge tubular bulging portion (16).

A fan (23) is provided on the front side wall (1c) of the casing (1), and a compressor (8) is arranged inside the casing (1).

In the above, the condenser (2) of the outdoor unit
The liquid refrigerant sent out from the casing first passes through the tubular bulging portion (5) for introduction of the liquid refrigerant distributing portion (10) formed on the left side wall (1a) of the casing (1). 7) Go inside,
Three discharge tubular bulges that are distributed while passing here
Each of them reaches inside (6) and is sent from there to evaporators (3) installed in three indoor rooms.

The gaseous refrigerant evaporated in each of the indoor evaporators (3) is sent out from each of the evaporators (3) and is joined to a refrigerant junction formed on the left side wall (1a) of the casing (1). (2
0), and is introduced into the three tubular bulges (15) for introduction.
Through (15), it enters the tubular bulging portion (17) for communication and silencing. The sound at this time is silenced by the communicating and silencing tubular bulge (17). The gaseous refrigerant that has been merged while passing through the silencing tubular bulging portion (17) reaches the inside of the discharging tubular bulging portion (16) and is discharged therefrom. The gaseous refrigerant further passes through the compressor (8) to the condenser (2), where it is condensed.

FIGS. 4 and 5 show a second embodiment of the present invention. Here, the difference from the first embodiment is that not only the left side wall (1a) of the casing (1) of the outdoor unit, but also the right side wall (1b) and the rear side wall (1d) are made of an aluminum roll bond. It is made of metal plywood (4) consisting of panels, and in particular, one end of the casing (1) has a liquid end on the left side wall (1a), right side wall (1b), and rear side wall (1d). A long meandering tubular bulge (9) connected to the tubular bulge for refrigerant introduction (5) and the other end connected to the tubular bulge for connection (7)
Is provided. This meandering tubular bulge
(9) can act as a condenser.

As described above, according to the second embodiment, the left side wall (1a) and the right side wall of the casing (1) composed of the metal laminated plate (4) are provided.
(1b) and the long meandering tubular bulge (9) provided on the rear wall (1d) act as a condenser, so that the casing (1)
Thus, there is an advantage that the performance of the refrigeration cycle of the room air conditioner is improved.

Since the other points of the second embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals in the drawings.

In each of the above embodiments, both the liquid refrigerant distributing section (10) and the gaseous refrigerant converging section (20) are made of a metal plate.
(4) Since it is formed integrally with the left side wall (1a) of the casing, it is easy to manufacture outdoor units for room air conditioners, especially when the number of evaporators (3) is changed. (4) It is easy to manufacture because it is only necessary to change the printing pattern of the anti-pressing agent to be printed. Further, since the number of parts is small, the manufacturing cost of the outdoor unit can be reduced, and the weight of the outdoor unit can be reduced. Further, in this embodiment, unlike the conventional gaseous refrigerant merging section, there is no need to weld the pipes, so that there is an advantage that leakage of the refrigerant from the welded portion can be prevented.

[0025]

As described above, the present invention relates to an outdoor unit for a room air conditioner having a casing and a condenser housed in the casing and connected to a plurality of indoor evaporators via pipes. At least a part of the casing is made of a metal ply plate, and one end of the liquid ply plate is opened at an edge of the metal ply plate and connected to the condenser through a pipe. A tubular bulging portion for introducing a refrigerant, a tubular bulging portion for discharging a liquid refrigerant which is open at one end to the edge of the metal joining plate and connected to the evaporator via a pipe, and a tubular bulging portion for introducing the liquid refrigerant; A liquid refrigerant distribution part comprising a swelling part and a connecting tubular swelling part for interconnecting the liquid refrigerant discharge tubular swelling parts is formed, and the liquid refrigerant from the condenser is supplied to an outdoor unit. Provided on the casing And through the distribution unit, it can be quickly distributed to the evaporators of the indoor, moreover fewer components,
This has the effect of reducing the manufacturing cost of the outdoor unit and reducing the weight of the unit.

[Brief description of the drawings]

FIG. 1 is a perspective view of an outdoor unit for a room air conditioner according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is a block diagram showing a refrigeration cycle of the room air conditioner of the first embodiment.

FIG. 4 is a perspective view of an outdoor unit for a room air conditioner according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a refrigeration cycle of the room air conditioner of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 1a Left side wall 2 Condenser 3 Evaporator 4 Metal laminated plate 5 Liquid refrigerant introduction tubular bulge 6 Liquid refrigerant discharge tubular bulge 7 Connection tubular bulge 8 Compressor 9 Long meandering tubular bulge Outlet 10 Liquid refrigerant distribution unit 20 Gaseous refrigerant junction

Claims (1)

(57) [Claims] 1. A room air conditioner comprising a casing (1) and a condenser (2) housed in the casing (1) and connected to a plurality of indoor evaporators (3) via piping. In the outdoor unit, at least a part of the casing (1) is made of a metal plywood (4), and one end of the metal plywood (4) has an opening at an edge of the metal plywood (4). And one tubular bulging portion (5) for introducing a liquid refrigerant, which is connected to the condenser (2) via a pipe, and one end of which is a metal mating plate (4)
A liquid refrigerant discharge tubular bulging portion (6) which is opened at the edge of the liquid evaporator (3) and connected to the evaporator (3) via a pipe, these liquid refrigerant introducing tubular bulging portion (5) and the liquid refrigerant Tubular bulge for discharge (6) Tubular bulge for connection (7) interconnecting two
An outdoor unit for a room air conditioner, in which a liquid refrigerant distribution section (10) is formed.