JPH04371734A - Outdoor unit for room air conditioner - Google Patents

Abstract

PURPOSE:To provide an outdoor unit for a room air conditioner in which an anti-pressure strength is quite high, and for example, in the case that a foreign object strikes against a casing of the unit, a pipe-like expanded part for refrigerant flow is not crushed and a heat exchanging performance can be improved due to an increased heat transmitting surface area. CONSTITUTION:An outdoor unit of a room air conditioner has a casing (1) and a condensor (2) stored in the casing (1) and connected to an indoor evaporator (3) through a pipe. At least a part of the casing (1) is comprised of two aluminum plates (11), (12) connected to each other and the casing is comprised of a laminated plate (4) having a pipe-like expanded part for refrigerant flow of predetermined shaped to be placed at an intermediate part of a pipe connecting the condensor (2) with the evaporator (3). An aluminum blazing sheet reinforcing plate (13) is connected to at least an outer surface of both inner and outer surfaces of the laminated plate (4).

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 include not only pure aluminum but also aluminum alloys.

0003

[Prior Art] Conventionally, in a refrigeration cycle used in a room air conditioner, one condenser is provided in an outdoor unit, and evaporators connected to the condenser are provided in multiple indoor rooms. The casing of the outdoor unit was equipped with a so-called distributor, which distributed the liquid refrigerant from the condenser and sent it to the evaporators in several rooms.

0004

[Problems to be Solved by the Invention] However, in the past, the casing of the outdoor unit was equipped with a distributor made as a separate component, which resulted in a large number of parts, increased manufacturing costs for the outdoor unit, and There was a problem that the weight of the

[0005] Therefore, the present applicant has previously proposed an outdoor unit for a room air conditioner in which a liquid refrigerant distribution section is integrally provided in a part of the casing (see, for example, Japanese Patent Application No. 3-1025). According to the previously proposed outdoor unit, the number of parts can be significantly reduced, the manufacturing cost of the outdoor unit can be reduced, and the weight of the unit can be reduced.

[0006] However, in the previously proposed outdoor unit, the casing is made of aluminum plywood, so the pressure resistance is relatively low, and if a foreign object hits the casing, there is a risk that the tubular bulge for refrigerant flow will collapse. There was a problem that there was.

[0007] In order to increase the pressure resistance of the casing, it is necessary to (1) increase the thickness of the aluminum plate, (2) narrow the width of the refrigerant circuit, that is, a tubular bulge for refrigerant distribution, and (2) increase the strength of the casing. For example, materials should be selected and used, and these conditions were set appropriately depending on the application, but there was a problem that this also had a limit when high strength was required.

[0008] The purpose of the present invention is to solve the above problems,
The object of the present invention is to further improve the previously proposed outdoor unit to provide an outdoor unit for a room air conditioner that has high strength and can improve heat exchange performance.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a casing and a condenser housed within the casing and connected to an indoor evaporator via piping. A tubular bulge portion for refrigerant circulation with a predetermined shape is formed, at least a part of which is formed of two aluminum plates bonded to each other, and is interposed in the middle of the pipe connecting the condenser and the evaporator. It is made of laminated boards that are attached to each other, and at least the outer surface of both the inside and outside of this laminated board is coated with aluminum brazing.
The gist is an outdoor unit for room air conditioners to which sheet reinforcing plates are bonded.

[0010] In the above, the laminated plate is made by, for example, printing an anti-crimping agent in a desired pattern on one side of one of the two aluminum plates, and crimping the other aluminum plate to this side. It is manufactured by the so-called roll bonding method, in which all the tubular bulges are formed at once by making a laminated plate with a crimped part and introducing fluid pressure into the non-crimped part of the laminated plate. It is manufactured by press forming to form recesses corresponding to all the tubular bulges, and then seam welding the other aluminum plate to this aluminum plate at the area around the recesses. Note that the method for manufacturing the laminated board is not limited to these.

[0011] A reinforcing plate made of an aluminum brazing sheet is then bonded to this laminated plate by, for example, a vacuum brazing method. Here, it is preferable that the reinforcing plate be bonded to both the inner and outer surfaces of the laminated plate, but it is sufficient if it is bonded to at least the outer surface of the laminated plate.

0012

[Operation] According to the above outdoor unit for room air conditioner,
At least a part of the casing is made of a laminated plate having a tubular bulge for refrigerant flow having a predetermined shape, and a reinforcing plate made of an aluminum brazing sheet is bonded to at least the outer surface of the laminated plate. It has extremely high pressure resistance, so even if a foreign object hits the casing, there is no need to worry about the tubular bulge for refrigerant flow being crushed.Furthermore, the heat transfer surface area is increased by joining the reinforcing plate, improving heat exchange performance. can be measured.

[0013]

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

[0014] In the drawings, the outdoor unit for a room air conditioner according to the present invention includes a casing (1) and a casing (1) housed within the casing (1) and connected to evaporators (3) in three indoor rooms via piping. Condenser (2)
It is equipped with

[0015]The casing of this outdoor unit (
1) The left side wall (1a), the right side wall (1b), and the rear side wall (1d) are made of two aluminum plates (11) (12) bonded to each other and have a predetermined shape for refrigerant flow. It is made of a laminated plate (4) made of aluminum roll-bonded panels with a tubular bulge (described later), and reinforcing plates made of aluminum brazing sheet ( 13) (13) are respectively joined.

[0016] In this way, reinforcing plates made of aluminum brazing sheets are installed on both the inner and outer surfaces of the laminated plates (4) constituting the left side wall (1a), right side wall (1b) and rear side wall (1d) of the casing (1). (13) Since (13) are joined, the pressure resistance is very high, and even if a foreign object hits the casing (1), for example, there is no fear that the refrigerant circulation tubular bulge will be crushed.

Moreover, since the heat transfer surface area is increased by joining the reinforcing plates (13) (13), it is possible to improve the heat exchange performance.

[0018] Here, the refrigerant circulating tubular bulge of the casing (1) will be described in detail.

First, a liquid refrigerant distribution section (10) is formed in the front half of the left side wall (1a) of the casing (1) made of a laminated plate (4), and a liquid refrigerant distribution section (10) is formed in the rear half of the left side wall (1a). A gaseous refrigerant merging section (20) is formed.

The liquid refrigerant distribution section (10) has one tubular bulge for introducing liquid refrigerant, one end of which opens at the front edge of the mating plate (4) and which is connected to the condenser (2) via piping. part (5); and a tubular bulging part (6) for discharging liquid refrigerant, each end of which opens at the front edge of the mating plate (4) and is connected to the three evaporators (3) via piping. , a tubular bulging part (5) for introducing liquid refrigerant, a tubular bulging part (6) for discharging liquid refrigerant, and a connecting tubular bulging part (7) for interconnecting them.

Furthermore, in this embodiment, the casing (
1) On the left side wall (1a), right side wall (1b), and rear side wall (1d), one end is provided with a tubular bulge portion (5) for introducing liquid refrigerant.
A long meandering tubular bulge (9) is provided which is connected to the connecting tubular bulge (7) at the other end. This serpentine tubular bulge (9) can act as a condenser.

A joint member (18) with a valve for connecting the pipe (25) from the evaporator (3) is attached to the opening of the tubular bulge (5) for introducing liquid refrigerant. A valved joint member (19) for connecting a pipe (24) extending to the evaporator (3) is attached to the opening of the discharge tubular bulge (6).

The gaseous refrigerant confluence section (20) has one end opened at the rear edge of the mating plate (4) and is connected to the three evaporators (3) through piping (26). Three tubular bulges (15) for introducing gaseous refrigerant, and one tube opening at each end at the rear edge of the mating plate (4) and connected to the compressor (8) via piping (14). A tubular bulging part (16) for discharging gaseous refrigerant, a tubular bulging part (15) for introducing gaseous refrigerant, and a tubular bulging part (15) for discharging gaseous refrigerant.
6) Tubular bulging part (1
7).

The portion of the communication/silencing tubular bulge (17) that communicates with the tip of each gaseous refrigerant introduction tubular bulge (15) branches into three parts. This branching part is shown as (17a). Therefore, each tubular bulge for introducing gaseous refrigerant (
The passage cross-sectional area of the part (17a) connected to 15) is
It is larger than the passage cross-sectional area of each tubular bulge for introducing gaseous refrigerant (15), and therefore the noise when the gaseous refrigerant flows into the tubular bulge for introducing gaseous refrigerant (15) is reduced. can be erased.

[0025] A joint member (21) for connecting the pipe (13) from the evaporator (3) is attached to the opening of each tubular bulge (15) for introducing the gaseous refrigerant. A compressor (8) is installed at the opening of the discharge tubular bulge (16).
A joint member (22) with a valve is attached to connect the pipe (14) extending to the main body.

Note that the front wall (1c) of the casing (1)
) is equipped with a fan (23) and the casing (1)
A compressor (8) is arranged inside the compressor (8).

In the above, the outdoor unit condenser (2
) The liquid refrigerant sent out from the casing (1
) The liquid refrigerant enters the communication tubular bulge (7) through the introduction tubular bulge (5) of the liquid refrigerant distribution part (10) formed on the left side wall (1a) of the liquid refrigerant distribution part (10), and while passing through this distributed into three drainage tubular bulges (6), respectively;
Evaporators (3) installed in three indoor rooms from there
sent to.

The gaseous refrigerant evaporated in each indoor evaporator (3) is sent out from each evaporator (3), and
The three introduction tubular bulges (1
5), and enters the communication/silencing tubular bulge (17) through each bulge (15). The sound at this time is muffled by the communication and muffling tubular bulge (17). The gaseous refrigerant that is combined while passing through the muffling tubular bulge (17) reaches the discharge tubular bulge (16) and is discharged from there. The gaseous refrigerant further passes through a compressor (8) to a condenser (2), where it is condensed.

In this embodiment, the liquid refrigerant distribution section (10) and the gaseous refrigerant confluence section (20) are both integrally formed on the left side wall (1a) of the casing made of the laminated plate (4). It is easy to manufacture an outdoor unit for a room air conditioner, and especially when the number of evaporators (3) is changed, it is only necessary to change the printing pattern of the anti-crimping agent printed on the laminated plate (4), so manufacturing is easy. is easy.

Furthermore, a casing (made of a laminated plate (4)) (
1) A long serpentine tubular bulge (9) provided on the left side wall (1a), right side wall (1b) and rear side wall (1d) of
Since the casing (1) acts as a condenser, the condensing capacity can be increased using the casing (1), which has the advantage of improving the performance of the refrigeration cycle of the room air conditioner.

[0031] In the above embodiment, the left side wall (1a), right side wall (1b), and rear side wall (1d) of the casing (1) are made of a laminated plate (4) made of an aluminum roll bond panel. However, it is not limited to this, for example, the left side wall of the casing (1) (
Only 1a) may be made of a laminated plate (4) made of an aluminum roll-bonded panel, in short, at least a part of the casing (1) may be made of a laminated plate (4).

[0032]

Effects of the Invention As described above, the outdoor unit for a room air conditioner according to the present invention includes a casing and a condenser housed within the casing and connected to an indoor evaporator via piping. A refrigerant flow tubular bulge part is formed in a predetermined shape and is formed of two aluminum plates bonded to each other and is interposed in the middle of the pipe connecting the condenser and the evaporator. A reinforcing plate made of aluminum brazing sheet is bonded to at least the outer surface of both the inside and outside surfaces of this laminated plate, so it has extremely high pressure resistance and prevents foreign matter from getting into the casing, for example. Even in the event of a collision, there is no fear that the tubular bulge for refrigerant flow will be crushed, and the heat transfer surface area is increased by joining the reinforcing plate, so it is possible to improve heat exchange performance.

This has the following effect.

Of course, according to the outdoor unit for a room air conditioner of the present invention, the liquid refrigerant from the condenser can be quickly distributed to each indoor evaporator through the distribution section provided in the casing of the outdoor unit. In addition, the number of parts is small, and the manufacturing cost of the outdoor unit is low.
There is an advantage that the weight of the unit can be reduced.

[Brief explanation of drawings]

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

[Fig. 2] An enlarged sectional view of the main part of the casing, which is shown in Fig. 3A.
-It is along line A.

FIG. 3 is an enlarged perspective view of the main parts of the casing.

FIG. 4 is a block diagram showing a refrigeration cycle of a room air conditioner.

[Explanation of symbols]

1 Casing 2 Condenser 3 Evaporator 4 Layering plate 5 Tubular bulge for liquid refrigerant introduction 6 Tubular bulge for liquid refrigerant discharge 7 Connecting tubular bulge 8 Compressor 9 Long meandering tubular bulge 10 Liquid Refrigerant distribution section 11 Aluminum plate 12 Aluminum plate 13 Aluminum brazing sheet reinforcing plate 20 Gaseous refrigerant confluence section

Claims (1)

[Claims] [Claim 1] A casing (1) and a casing (
1) a condenser (2) housed within the evaporator (3) and connected via piping to an indoor evaporator (3);
A tubular bulge portion for refrigerant flow of a predetermined shape is formed between two aluminum plates (11) and (12) and is interposed in the middle of the pipe connecting the condenser (2) and the evaporator (3). A reinforcing plate (13) made of aluminum brazing sheet is bonded to at least the outer surface of both the inside and outside surfaces of the laminated plate (4). outdoor unit.