JP3405428B2 - 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 air conditioner,
More specifically, the present invention relates to a structure in which a refrigerant is uniformly branched and flows when a refrigerant flow path during a cooling operation is branched by a branch pipe and flows into a heat exchanger.

[0002]

2. Description of the Related Art A conventional air conditioner has, for example, FIGS.
As shown in (A) and (B), the compressor 1, the four-way valve 3, the outdoor heat exchanger 4, the decompressor 5, and the indoor heat exchanger 6 are sequentially connected by a connecting pipe 2 to form the indoor heat exchanger. The refrigerant flow path 6 is branched at its inlet by a branch pipe 2a, and divided into a refrigerant flow path connected to the first path and a refrigerant flow path connected to the second path,
The refrigerant flow path in the indoor heat exchanger 6 during the cooling operation or the heating operation has a two-pass configuration. With the above configuration,
By connecting the connection pipe 2 to the branch pipe 2a that branches into two paths at the inlet of the indoor heat exchanger 6 to branch the refrigerant flow path, the heat exchange efficiency of the indoor heat exchanger 6 is improved. . However, during the cooling operation, the refrigerant in the connection pipe 2 which is branched by the branch pipe 2a and is about to flow into the indoor heat exchanger 6 as shown by an arrow in FIG. As shown in (B), since the mixed state of the liquid refrigerant a and the gaseous refrigerant b is biased, the branch pipes 2a are not evenly branched, and the heat exchange of the indoor heat exchanger 6 is performed. It had a problem of reducing efficiency.

[0003]

In the present invention, when the refrigerant flow path during cooling operation is branched by the branch pipe at the heat exchanger inlet, a liquid refrigerant and a gaseous refrigerant that are uniformly mixed, It is an object of the present invention to provide an air conditioner that is evenly branched.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger are sequentially connected by piping. In an air conditioner in which the refrigerant flow path of the indoor heat exchanger is branched into two paths by a branch pipe , a part of the refrigerant flow path connected to the branch pipe provided at the indoor heat exchanger inlet during cooling operation With a substantially flat shape, and the flat portion is
It is characterized in that it is formed at a position slightly separated from the manifold . Further, it is characterized in that the substantially flat cross-sectional area is formed to have substantially the same area as the cross-sectional area of the refrigerant flow path in front of the branch pipe. Furthermore, the major axis direction of the substantially flat shape is formed substantially at a right angle to the branching direction of the branch pipe.

[0005]

According to the above construction, when the refrigerant flow path during the cooling operation is branched by the branch pipe at the heat exchanger inlet, the liquid refrigerant and the gaseous refrigerant are in a well-balanced state, and the refrigerant is evenly distributed. It becomes an air conditioner that is branched to the air conditioner to prevent the heat exchange efficiency from decreasing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1, 2 (A), (B) and (C), 1 is a compressor, 2 is a compressor 1 and a four-way valve, an outdoor heat exchanger, a decompressor and an indoor heat exchanger, which will be described later, are connected. It is a connection pipe which constitutes a refrigeration cycle. As shown in FIG. 1, reference numeral 2a denotes a branch pipe that serves as an inlet of an indoor heat exchanger, which will be described later, and branches the refrigerant flow path into two paths to divert the refrigerant during the cooling operation. 2b, as shown in FIGS. 2 (A) and (B),
The refrigerant flow path branched by the branch pipe 2a is a first connecting pipe that is connected to a first path of an indoor heat exchanger described later. 2c
2A and 2B are second connection pipes in which the refrigerant flow path branched by the branch pipe 2a is connected to the second path of the indoor heat exchanger described later. 2d is shown in FIG.
As shown in (B) and (C), it is a substantially flat portion formed in a part of the connection pipe 2a before the branch pipe 2a on the indoor heat exchanger inlet side, which will be described later, during the cooling operation. 3 is a four-way valve, 4 is an outdoor heat exchanger, 5 is a decompressor, and 6 is an indoor heat exchanger. These are, as described above, together with the compressor 1,
The connection pipe 2, the branch pipe 2a, the first connection pipe
2b and the second connection pipe 2c are sequentially pipe-connected to form a refrigeration cycle. With the above configuration, during the cooling operation, the branch pipe 2a on the inlet side of the indoor heat exchanger described later.
The substantially flat portion formed in a part of the connection pipe 2a on the front side
The cross-sectional area of 2d is formed to have substantially the same area as the cross-sectional area of the connection pipe 2a, so that the substantially flat portion 2d does not become a so-called bottleneck and the flow rate of the refrigerant can be made substantially constant. Has been done. Further, the substantially flat portion 2d
Has a configuration in which a separating portion c is provided so as to be slightly separated from the branch pipe 2a for branching the refrigerant flow path into two paths to divide the refrigerant during the cooling operation. As shown in FIG. 2 (B), the liquid refrigerant a and the gaseous refrigerant b are almost uniformly mixed in the substantially flat portion 2d, as shown by the arrow in FIG. 2 (A). In, the branch pipe 2a for branching the refrigerant by branching the refrigerant flow path into two paths
In addition, the structure is such that the flow branches in almost evenly. In the cooling operation, the substantially flat portion 2d is formed such that the major axis direction e thereof is substantially perpendicular to the branching direction d of the branch pipe 2a, as shown in FIG. 2 (B). As shown in FIG. 2 (B), the liquid refrigerant a and the gaseous refrigerant b are more effectively and almost uniformly mixed in the substantially flat portion 2d. As indicated by the arrow), the flow is branched into the branch pipe 2a substantially evenly.

With the above structure, FIGS. 1 and 2A and 2B
As shown in (C), during the cooling operation, the refrigerant in the connection pipe 2 is in a gaseous state with the liquid refrigerant a in the substantially flat portion 2d formed in the connection pipe 2 in front of the branch pipe 2a. Refrigerant b
And are almost uniformly mixed, and the refrigerant flows into the branch pipe 2a while branching into the branch pipe 2a almost uniformly, whereby the air conditioner does not deteriorate the heat exchange efficiency. During the heating operation, the indoor heat exchanger 6 is configured as described above.
The substantially flat portion 2d serving as an outlet of the refrigerant from is not a so-called bottleneck because the substantially flat portion 2d and the connection pipe 2 have substantially the same cross-sectional area, and the refrigerant circulates smoothly. The air conditioner does not reduce the heat exchange efficiency.

[0008]

As described above, according to the present invention, when the refrigerant branched through the branch pipe at the heat exchanger inlet flows through the refrigerant passage during the cooling operation, the liquid refrigerant and the gaseous refrigerant are uniform. The air conditioner can prevent the heat exchange efficiency of the heat exchanger from being lowered because the air conditioner is mixed into the air conditioner and is evenly branched and flows into the two-pass refrigerant flow path.

[Brief description of drawings]

FIG. 1 is a diagram showing a refrigeration cycle of an air conditioner according to the present invention.

2 is an enlarged view of a portion A shown in FIG. 1, (A) is a cross-sectional view of a main part, (B) is a BB cross-sectional view shown in (A),
(C) is a C arrow line view shown in (A).

FIG. 3 is a diagram showing a refrigeration cycle of an air conditioner according to a conventional example.

4 is an enlarged view of a portion A shown in FIG. 3, (A) is a sectional view of a main part, and (B) is a sectional view taken along line BB shown in (A).

[Explanation of symbols]

1 compressor 2 connection piping 2a Branch pipe 2b First connection pipe 2c Second connection pipe 2d Substantially flat part 3 four-way valve 4 outdoor heat exchanger 5 pressure reducer 6 Indoor heat exchanger a Liquid refrigerant b Gaseous refrigerant c Separation part d Branching direction of branch pipe ￲Long diameter direction of the substantially flat part

Claims (3)

(57) [Claims] 1. A compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer,
And an indoor heat exchanger are sequentially connected by piping, and an air conditioner in which the refrigerant flow path of the indoor heat exchanger is branched into two paths by a branch pipe, wherein the indoor heat exchanger inlet during cooling operation is provided. Part of the refrigerant flow path connected to the branch pipe has a substantially flat shape
In addition, the flat portion was slightly separated from the branch pipe.
An air conditioner characterized by being formed in a position . 2. The air conditioner according to claim 1, wherein the substantially flat cross-sectional area is formed to have substantially the same area as the cross-sectional area of the refrigerant passage in front of the branch pipe. 3. The substantially flat major axis direction of the branch pipe
It is characterized in that it is formed almost at right angles to the branching direction.
The air conditioner according to claim 1 or 2.