JP3043218B2 - 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 having four refrigerant passages.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 5-12635 discloses that a refrigerant flow path of a heat exchanger incorporated in an air conditioner is divided into two parts.
There is one described in No. 5. FIG. 3 shows a heat exchanger described in this publication. In the figure, reference numeral 30 denotes a heat exchanger in which a refrigerant circulates, 34 denotes a refrigerant pipe, 32 denotes a refrigerant distribution device, 36 denotes a branch pipe, 38 denotes a bent portion, and 40 denotes an auxiliary bent portion.

In the air conditioner heat exchanger configured as described above, the refrigerant flowing from the refrigerant pipe 34 has a deviated flow when passing through the bend portion 38, but the deviated flow is generated by the auxiliary bend portion 40. The flow is substantially uniformly rectified, and the refrigerant is substantially uniformly diverted in the branch pipe 36.

[0004]

The heat exchanger 30 described above.
In the case where the refrigerant is divided into four flow paths, it is conceivable that the refrigerant distribution device 32 has two stages. However, as shown in FIG. Since a predetermined dimension is required, the heat exchanger itself may be enlarged accordingly.

According to the present invention, when the refrigerant passage of the heat exchanger is divided into four or more passages, the heat exchange useful for making the indoor unit compact while equalizing the flow of the refrigerant to each refrigerant passage. It is intended to provide an air conditioner provided with a vessel.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an air conditioner comprising a heat exchanger in which a refrigerant circulates, wherein the refrigerant is divided into four parts and supplied to the heat exchanger.
The first refrigerant pipe having a bent portion and an auxiliary bent portion bent in a direction opposite to the bending direction of the bent portion by dividing the refrigerant into the four hands, and T on the side of the auxiliary bent portion of the first refrigerant tube. A first branching device composed of a first branch pipe connected in a U-shape, a second refrigerant pipe having one end connected to the first branch pipe and the other end closed, and one end of the second refrigerant pipe connected to the second refrigerant pipe. And a second branching device composed of a second branch pipe which is inserted at a right angle up to a substantially central portion of the second branch and is connected to the heat exchanger at the other end.

[0007] Further, the first and / or second flow dividing devices are arranged on the side of the heat exchanger, provided with a hot water heat exchanger for circulating hot water therein, and a second refrigerant pipe and a second refrigerant pipe. And / or a second branch pipe is arranged on the secondary side of both heat exchangers, and at least a part of the second branching device is a U-shaped pipe and a U-shaped pipe provided on a tube plate of a heat exchanger for hot water. It is arranged between and.

[0008]

In this air conditioner, although the refrigerant that has passed through the bent portion of the first refrigerant pipe has a bias, the bias is almost corrected by the auxiliary bent portion and the flow of the refrigerant is substantially uniformly rectified. The refrigerant is diverted almost uniformly by the single diverter. Furthermore, at one end of the second refrigerant pipe, the refrigerant collides with the second branch pipe inserted up to the substantially central portion and is stirred, whereby the flow of the refrigerant becomes substantially uniform, and the refrigerant flows into the second branching device. The flow is divided almost equally. Therefore, the refrigerant is almost equally divided into two parts by the first dividing device, and the divided refrigerant is divided into two parts by the second dividing device.

Further, in the case where the first branch device and / or the second branch device are arranged on the side of the heat exchanger, particularly, the first branch device and / or the second branch device may be the air passing through the heat exchanger. Does not become resistance.

[0010] Further, in the case where a heat exchanger for refrigerant and a heat exchanger for hot water are provided, and the second refrigerant pipe and / or the second branch pipe are arranged on the secondary side of both heat exchangers, the second heat pipe is particularly preferable. The refrigerant pipe and / or the second branch pipe do not affect the configuration of the heat exchanger for refrigerant or the heat exchanger for hot water.

Further, a heat exchanger for a refrigerant and a heat exchanger for hot water are provided, and at least a part of the second branching device is arranged between the U-shaped tubes of the heat exchanger for hot water. In this case, in particular, a part of the second branching device does not become a resistance of air and does not affect the configuration of the heat exchanger for the refrigerant or the heat exchanger for the hot water.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the illustrated embodiment, the wall-mounted indoor unit of the air conditioner is divided into four refrigerant passages in two stages, for a total of three locations.

In the figure, reference numeral 2 denotes an indoor unit containing a heat exchanger. As a recent trend, it is required to reduce the size of the indoor unit 2, that is, to reduce the length, width, and thickness of the indoor unit 2 as much as possible.

Reference numeral 4 denotes a heat exchanger for the refrigerant in which the refrigerant circulates, and 5 denotes a heat exchanger for the hot water in which the hot water circulates. I have. 6 is a heat transfer tube of the heat exchanger 4 for refrigerant, 7 is a heat transfer tube of the heat exchanger 5 for hot water, and 8 is a heat transfer fin attached to the heat transfer tube.

Reference numeral 10 denotes a refrigerant distribution device, which is provided on the secondary side of the heat exchanger 4 for the refrigerant and the heat exchanger 5 for the hot water, that is, on the side where the indoor air exchanged by these heat exchangers is obtained. The first is connected to the refrigerant passage of the refrigerant heat exchanger 4 that is disposed on the side of the heat exchanger, and the supplied refrigerant is divided into four refrigerant passages in two stages in total at three places. It comprises a flow dividing device and a second flow dividing device.

The structure of the refrigerant distribution device 10 will be described below. Reference numeral 12 denotes a first refrigerant pipe for sending the refrigerant to the refrigerant heat exchanger 4, reference numeral 13 denotes a first branch pipe. A first diversion device is formed by connecting the pipe 12 in a T-shape so as to block the pipe 12 at a right angle. Therefore, this point A becomes the first branch point, and the refrigerant flowing through the inside of the first refrigerant pipe 12 is first divided into two vertical refrigerant passages. Arrows indicate the flow of the refrigerant. In addition, since the flange is welded at the point A, the mounting angle is hardly shifted.

The first refrigerant pipe 12 has an auxiliary bend portion A2 and a bend portion A1 in order from a point closer to the point A. The curvature of the auxiliary bend portion A2 closer to the point A is calculated from the curvature of the bend portion A1. I'm making it smaller. For example, the angle is about 15 degrees, and the bending direction is reversed in the auxiliary bending portion A2 and the bending portion A1.

The second flow dividing device has one end communicating with the first branch pipe 13 and the other end closed with the second refrigerant pipes 14 and 1.
4 and one end thereof is connected to the second refrigerant pipes 14 and 14 in a T-shape at points B and B slightly before the closed end, and the other end forms part of the second branch pipe. The refrigerant pipes 16 are connected in a T-shape. That is,
The other end of the refrigerant pipe 16 is connected to an intermediate point C between the 180-degree bends 18, 18 constituting the heat transfer pipe 6 of the heat exchanger 4 for refrigerant so as to form a T-shape. It is thinner and shorter than the tube 14. This second flow dividing device is provided at two places. For this reason, the intermediate point C, C becomes the second branch point, and the refrigerant that has passed through the first refrigerant pipe 12, the first branch pipe 13, and the second refrigerant pipes 14, , 16 divided into two hands each, a total of 4
And flows through the heat transfer tubes 6 of the refrigerant heat exchanger 4.

Then, the first branch pipe 1 connected to one
The entirety of the third and second refrigerant pipes 14 and 14 are also bent in the shape of a square in accordance with the shapes of the heat exchanger for refrigerant 4 and the heat exchanger 5 for hot water. Thereby, the refrigerant pipes 16, 16 can be connected to the second refrigerant pipes 14, 14 and the bends 18, 18 in a T-shape, and the size can be reduced. At points B and B, the refrigerant pipes 16 and 16 are
The distal end cut at a right angle is inserted into the second refrigerant pipes 14 at right angles to the approximate center thereof and connected thereto.

The refrigerant pipes 16, which constitute a part of the second branching device, are piped between U-shaped heat transfer pipes 7, which are piped to the side of the hot water heat exchanger 6. ing.

The refrigerant that has flowed through the heat transfer tube 6 in four parts exchanges heat with the room air through the tube wall and the heat transfer fins 8, and then the refrigerant flows into the refrigerant tube 20 at the upper part and to the lower part at the lower part. Gather in the refrigerant pipe 22, further join and exit the heat exchanger for refrigerant 4 through one refrigerant pipe 24.

In this indoor unit 2 provided with a heat exchanger 4 for refrigerant and a heat exchanger 5 for hot water, hot water is supplied from a hot water inlet 26 provided at a lower portion of the heat exchanger 5 for hot water, and provided at an upper portion. When the hot water is discharged from the hot water outlet 28 and the refrigerant is circulated and supplied to the refrigerant heat exchanger 4 and evaporated, a dry operation is performed, the hot water is supplied to the hot water heat exchanger 5, and the refrigerant heat exchanger is supplied. When the supply of the refrigerant to 4 is stopped, the heating operation is performed,
When the supply of the hot water to the hot water heat exchanger 5 is stopped, and the refrigerant is circulated to the refrigerant heat exchanger 4 and evaporated, the cooling operation is performed.

Although not shown, the indoor unit 2 is provided with equipment such as a pre-filter, an air purifying filter, a blower, a drain pan and the like, which are installed in a normal indoor unit.

If the second-stage flow dividing structure is used in the third stage, it is possible to equally distribute the flow to eight refrigerant passages.

[0025]

According to the present invention, the refrigerant is almost equally divided into two parts by the first dividing device, and the divided refrigerant is further divided into two parts by the second dividing device. Can be divided approximately evenly into the four flow paths, and an air conditioner having a small flow resistance of the refrigerant and an improved heat exchange rate can be provided.

Further, in the case where the first branch device and / or the second branch device are arranged on the side of the heat exchanger, the first branch device and / or the second branch device particularly connect the heat exchanger. Since it does not become the resistance of the passing air, it is possible to provide an air conditioner in which an increase in ventilation resistance and an increase in noise are prevented.

[0027] In addition, in the apparatus having a heat exchanger for refrigerant and a heat exchanger for hot water, wherein the second refrigerant pipe and / or the second branch pipe are arranged on the secondary side of the heat exchanger for hot water, In particular, since the second refrigerant pipe and / or the second branch pipe do not affect the configuration of the heat exchanger for refrigerant or the heat exchanger for hot water, it is possible to eliminate the possibility of increasing the size of these heat exchangers.

Further, a heat exchanger for refrigerant and a heat exchanger for hot water are provided, and at least a part of the second branching device is arranged between the U-shaped tubes of the heat exchanger for hot water. In the thing, in particular, since at least a part of the second branching device does not affect the configuration of the heat exchanger for air or refrigerant or the heat exchanger for hot water, an increase in ventilation resistance and an increase in noise are reduced. It is possible to prevent the heat exchanger and to increase the size of these heat exchangers.

[Brief description of the drawings]

FIG. 1 is a side view showing a heat exchanger of an air conditioner of the present invention.

FIG. 2 is a perspective view of an indoor unit of the air conditioner of the present invention.

FIG. 3 is a side view showing a conventional heat exchanger.

[Explanation of symbols]

 2 Indoor Unit 4 Heat Exchanger for Refrigerant 5 Heat Exchanger for Hot Water 6 Heat Transfer Tube (For Refrigerant) 7 Heat Transfer Tube (For Hot Water) 10 Refrigerant Divider 12 First Refrigerant Tube 13 First Branch Pipe 14 Second Refrigerant Pipe 16 Second refrigerant pipe 18, 18 Bend 26 Hot water inlet 28 Hot water outlet A1 Bend A2 Auxiliary bend

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Akiyama 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hirofumi Iinuma 2-5-2 Keihanhondori, Moriguchi-shi, Osaka 5 Sanyo Electric Co., Ltd. (72) Inventor Jun Yamauchi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-5-126355 (JP, A) Showa 51-37355 (JP, U) Actually open Showa 62-62173 (JP, U) Showa 45-677 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1 / 00 F25B 41/00

Claims (4)

(57) [Claims] 1. A heat exchanger in which a refrigerant circulates,
The refrigerant is divided into four parts and supplied to this heat exchanger.
In the air conditioner that has been formed, the refrigerant shunt to the four hands is bent.
Bend in the opposite direction to the bend and this bend
A first refrigerant pipe having a curved auxiliary bend and
First branch connected in a T-shape to the auxiliary bend of the refrigerant tube
A first branching device consisting of a tube, one end of which is the first branch
A second refrigerant pipe connected to the pipe and closed at the other end;
One end of the medium pipe is inserted at right angles to the approximate center of the second refrigerant pipe.
The other end is branched into two hands and connected to the heat exchanger.
And a second branching device composed of a second branch pipe.
An air conditioner characterized by and. 2. The first split device and / or the second split device.
The heat exchanger is arranged on the side of the heat exchanger.
The air conditioner according to claim 1 . 3. A heat exchanger for hot water for circulating hot water therein.
And the second refrigerant pipe and / or the second branch pipe are
2. The heat exchanger according to claim 1, wherein the heat exchanger is disposed on the secondary side.
The air conditioner according to item 1. 4. The method according to claim 1, wherein at least a part of said second flow dividing device is disposed
U-tube and U-tube provided on the tube plate of the heat exchanger for hot water
The air conditioner according to claim 2, wherein the air conditioner is disposed between the air conditioners.