JP2003148756A - Refrigerant flow divider of heat exchanger, and air conditioner using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant flow divider which easily and correctly divides the refrigerant flow, and an air conditioner using it. SOLUTION: In the refrigerant flow divider 45 of a heat exchanger to divide the flow of the refrigerant from an inlet pipe 73 to refrigerant pipes 63 and 64 of the multi-pass heat exchanger, a bend 71 is provided on a flow division part to the refrigerant pipes 63 and 64, and the inlet pipe 73 is joined with a substantially straight pipe part 71B avoiding a bent pipe part 71A of the bend 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant distribution device for each refrigerant pipe in a multipass heat exchanger and an air conditioner using the same.

[0002]

2. Description of the Related Art Generally, in a multi-pass heat exchanger,
A flow dividing device for dividing the refrigerant from the introduction pipe into each of the refrigerant pipes is required so that the refrigerant flows in each of the refrigerant pipes substantially evenly and heat is uniformly exchanged in each pass.

A conventional flow dividing device is disclosed in, for example, Japanese Patent No. 303.
As disclosed in Japanese Patent No. 6929, it is known that an auxiliary bending portion bent in a direction opposite to the bending direction of the bending portion is formed between the branch pipe and the bending portion.

[0004]

In the conventional structure, there is a problem that it is difficult to set the bending angle of the bending portion or the auxiliary bending portion, and even if it is set, the manufacturing becomes difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a refrigerant shunting device capable of simply and accurately shunting a refrigerant and an air conditioner using the same. is there.

[0006]

According to a first aspect of the present invention, in a refrigerant distribution device for a heat exchanger, which divides a refrigerant from an introduction pipe into each refrigerant pipe of a multi-pass heat exchanger, It is characterized in that the flow dividing portion is provided with a bend, and the introduction pipe is joined to a substantially straight pipe portion which avoids the curved pipe portion of the bend.

According to a second aspect of the invention, in the first aspect, the introduction pipe is joined so as to be substantially orthogonal to the straight pipe portion.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described one, the straight pipe portion length of the bend of the flow dividing portion is formed longer than the straight pipe portion length of the other bends.

The invention according to claim 4 is a compressor, a condenser,
In an air conditioner equipped with a pressure reducing device and an evaporator,
The condenser and / or the evaporator are formed by a multi-pass heat exchanger, and a bend is provided in a branch portion to each refrigerant pipe of the heat exchanger, and the bend is provided in a substantially straight pipe portion avoiding the curved pipe portion. It is characterized in that the introduction pipe is joined.

According to a fifth aspect of the present invention, in the fourth aspect, the introduction pipe is joined so as to be substantially orthogonal to the straight pipe portion.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the described one, the straight pipe portion length of the bend of the flow dividing portion is formed longer than the straight pipe portion length of the other bends.

[0012]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram of an air conditioner including a sectional view of an indoor unit. The indoor unit 1 is connected to an outdoor unit 11 having a compressor 12, an outdoor heat exchanger 13, and a decompressor 14 whose operating frequencies are not shown, which are controllable, by an inter-unit pipe 16 to connect an air conditioner 10. I am configuring.

The case of the indoor unit 1 includes a front case part 2A on the front side, a suction panel 2B provided at the front part of the front case part 2A and having an air inlet for indoor air, and a rear part on the rear side. It is composed of a case portion 2c.

In this case, the indoor heat exchanger 4 for heating / cooling / dehumidifying the indoor air and the indoor air are sucked from the intake port of the suction panel 2B and heated / heated by the indoor heat exchanger 4.
Blower fan 5 that cools / dehumidifies and circulates again in the room,
An air filter 7 for removing relatively large dust in the room air sucked by the blower fan 5, and an air filter 7
And an air purifying filter 8 for further removing relatively fine dust of the air in the room that has passed through.

Reference numeral 6 denotes a drain pan, and this drain pan 6
An outlet 9 for cold / warm air is formed below. The air outlet 9 is provided with a vertical airflow direction changing blade 9A and a horizontal airflow direction changing blade 9B.

The indoor heat exchanger 4 has three heat exchange parts 4A,
It is divided into 4B and 4C. When the air conditioner is operated for heating, all the heat exchange units 4A, 4A
B and 4C function as a condenser, and when the cooling operation is performed, all the heat exchange sections 4A, 4B and 4C function as an evaporator.

When the two heat exchanging sections 4A and 4B function as evaporators while the remaining heat exchanging section 4C functions as a reheater, a full-scale dry system that heats the cooled and dehumidified air and blows it indoors It becomes possible to drive.

The control device 15 of the air conditioner 10 is
As described above, the heat exchange sections 4A, 4B and 4 of the indoor heat exchanger 4
C functions as a condenser during heating operation and functions as an evaporator during cooling operation. Further, during the full-scale dry operation, the control device 15 causes the heat exchange units 4A and 4B to function as evaporators and the heat exchange unit 4C to function as a reheater, and controls the AC power supplied to the electric motor of the compressor 12. Operating frequency (hereinafter referred to as compressor 12 operating frequency)
To achieve good dehumidification without lowering the room temperature.

FIG. 2 is a front view of the indoor heat exchanger 4, FIG.
[Fig. 4] is an end view of the indoor heat exchanger 4, also. Briefly explaining the flow of the refrigerant of the indoor heat exchanger 4, referring to FIG.
The refrigerant that has passed through the inlet pipe 51 flows through the pipe 5 as indicated by the solid arrow.
2, and meander the refrigerant pipe on the upper side of the heat exchange section 4C,
To the pipe 53. The refrigerant having passed through the pipe 53 enters the flow divider 54, where it is divided into the pipe 55 and the pipe 56.

The refrigerant branched to one of the tubes 55 enters the tube 57, meanders a part of the refrigerant tube of the heat exchange section 4C to reach the tube 58, and flows into the solenoid valve (dry valve) 41 through the tube 59. To do. The refrigerant branched to the other pipe 56 reaches the pipe 60, meanders a part of the refrigerant pipe of the heat exchange section 4B, and reaches the pipe 61.
A part of the refrigerant pipe of the heat exchange section 4C meanders and flows into the solenoid valve 41. The refrigerant combined at the dry valve 41 passes through the muffler 43 and enters the flow divider 45. In this flow divider 45, as shown in FIG. 2, the flow is divided into multi-pass pipes 63 and 64. The refrigerant split into one of the pipes 63 reaches the pipe 65 with reference to FIG. 3, and enters the collecting pipe 67 via the pipe 66. Refrigerant diverted to the other pipe 64 (FIG. 2) will be described with reference to FIG.
It reaches the pipe 68 and enters the collecting pipe 67 via the pipe 69. The refrigerant that has joined the collecting pipe 67 flows out through the outlet pipe 70.

In this embodiment, the dry valve 41 and the muffler 4 are
It is characterized by a flow divider (refrigerant flow dividing device) 45 for dividing the refrigerant after passing through 3.

As shown in FIG. 4, the flow diverter 45 has a bend 71 bent in a substantially U-shape at the flow dividing portion to each of the pipes 63 and 64.
The bend pipe portion 71A of the bend 71 is avoided by joining the introduction pipe 73 connected to the muffler 43 to the straight pipe portion 71B. As shown in FIG. 5, the axis L1 of the introduction pipe 73 is joined to the axis L2 of the curved pipe portion 71A at an angle θ, and the introduction pipe 73 is connected to the straight pipe portion 71B as shown in FIG. They are joined substantially orthogonally. As shown in FIG. 2, the length of the straight pipe portion 71B of the bend 71 in the flow dividing portion is formed longer than the length of the straight pipe portion in the other bend 101 adjacent to the straight pipe portion 71B. According to this, since the straight pipe portion 71B of the bend 71 projects outward longer than the bend adjacent to the bend 71, the introduction pipe 73 and the straight pipe portion 71B can be easily joined.

In the present embodiment, the refrigerant flowing in through the introduction pipe 73 passes through the flow divider (refrigerant flow dividing device) 45 to
It is divided into two tubes 63 and 64. When the refrigerant is split into the tubes 63 and 64 evenly, it is important that the gravity, the dynamic pressure of the refrigerant, the centrifugal force, and the like act substantially uniformly. In the above configuration, referring to FIG. 4, since the introduction pipe 73 extends substantially directly below and is joined to the substantially straight pipe portion 71B of the bend 71 that avoids the curved pipe portion 71A, the refrigerant flowing in through the introduction pipe 73 is prevented. In contrast,
Gravity, the dynamic pressure of the refrigerant, the centrifugal force, etc. can be made to act substantially uniformly, and as shown by the solid arrows A and B, the tubes 63, 6
It is possible to divide the refrigerant into the four substantially evenly.

In this embodiment, referring to FIG. 4, the introduction pipe 7
3 is joined to the bent pipe portion 71A of the bend 71 and the joining position 75 of the straight pipe portion 71B. Therefore, the introduction pipe 73 is inclined toward the pipe 64 by the angle θ1. When the introduction pipe 73 is made orthogonal to the straight pipe portion 71B without providing this inclination θ1, the refrigerant flows into the pipe 64 side more than the pipe 63. In this embodiment, since the centrifugal force acts on the refrigerant by providing the inclination θ1, it is possible to divide the refrigerant into the tubes 63 and 64 substantially evenly. The introduction pipe 73 is the bend 7
In the case of being joined to the straight pipe portion 71B of No. 1, the inclination θ1 is not provided, and the introduction pipe 73 may be orthogonal to the straight pipe portion 71B.

The present invention has been described above based on the embodiment, but the present invention is not limited to this.

In the above construction, the heat exchanger provided with the refrigerant distribution device 45 has been described by taking the air conditioner as an example, but it goes without saying that this heat exchanger can be widely applied to refrigeration devices other than the air conditioner. Is.

[0028]

EFFECTS OF THE INVENTION The present invention has the effect that the refrigerant can be diverted easily and accurately as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an air conditioner according to the present invention.

FIG. 2 is a front view of a heat exchanger.

FIG. 3 is also an end view of the heat exchanger.

FIG. 4 is a perspective view showing a refrigerant distribution device.

FIG. 5 is a front view of the refrigerant distribution device of the same.

[Explanation of symbols]

4 Indoor heat exchanger 41 Solenoid valve (dry valve) 45 flow divider (refrigerant flow dividing device) 63, 64 tubes 71 Bend 71A curved pipe section 71B Straight pipe part 73 Introduction tube

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Manabu Kimura             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation (72) Inventor Masami Saito             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation (72) Inventor Toshimitsu Nakajima             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation F-term (reference) 3L051 BF01 BF02

Claims (6)

[Claims] 1. A refrigerant flow dividing device of a heat exchanger for dividing the refrigerant from an introduction pipe into each refrigerant pipe of a multi-pass heat exchanger, wherein a bend portion is provided at a flow dividing portion to each refrigerant pipe, and a bent pipe of the bend is provided. A refrigerant distribution device for a heat exchanger, characterized in that the introduction pipe is joined to a substantially straight pipe portion that avoids the portion. 2. The refrigerant distribution device for a heat exchanger according to claim 1, wherein the introduction pipe is joined so as to be substantially orthogonal to the straight pipe portion. 3. The refrigerant distribution device for a heat exchanger according to claim 1, wherein the straight pipe portion length of the bend of the flow dividing portion is formed longer than the straight pipe portion length of the other bends. 4. An air conditioner equipped with a compressor, a condenser, a pressure reducing device, and an evaporator, wherein the condenser and / or the evaporator are formed by a multi-pass heat exchanger, and each refrigerant of the heat exchanger. An air conditioner characterized in that a bend is provided in a flow dividing portion to the pipe, and the introduction pipe is joined to a substantially straight pipe portion which avoids the curved pipe portion of the bend. 5. The air conditioner according to claim 4, wherein the introduction pipe is joined so as to be substantially orthogonal to the straight pipe portion. 6. The air conditioner according to claim 4, wherein the straight pipe portion length of the bend of the flow dividing portion is formed longer than the straight pipe portion length of the other bends.