JPH11148708A - Air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the occurrence of disturbance of a flow of air at the internal part of an indoor unit, to decrease flow resistance of air, and to improve air supply performance. SOLUTION: A cross fin type heat-exchanger 30 comprises fins 31 laminated at intervals of a given distance; and a heat transfer tube 32. The fins 31 of the heat-exchanger 30 is divided into first-third fin pieces 51 and 53 and the fin pieces 51-53 are laminated to form first-third fin trains 41-43. First and second fin trains 41 and 42 are arranged such that the longitudinal directions of the fin pieces 51 and 52 of the two fin trains 41 and 42 cross each other at an acute angle and a given distance is kept between the upper parts of the two fin trains 41 and 42. In this case, a distance 35 is provided between the upper parts of the two fin trains 41 and 42. Further, a plate-form seal part 36 is provided to close a gap 35 between the two fin trains 41 and 42 and block a flow of air in the gap 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for an air conditioner, and more particularly, to a measure for improving ventilation performance.

[0002]

2. Description of the Related Art Conventionally, air conditioners have been disclosed in
As disclosed in JP-A-72297, a cross-fin type heat exchanger (a) and a fan (20) each having a substantially inverted V-shape viewed from the side are housed in a casing (10) and are mounted on a wall. There is one that is configured. This type of air conditioner is shown in FIG.
As shown in FIG. 1, the casing (10) has an inlet (11) formed from the upper front surface to the upper surface, while the outlet (12) is formed at the lower front surface, and the casing (10)
An air passage (16) communicating with the inlet (11) and the outlet (12) is formed inside. And this air passage (16)
Is provided with a heat exchanger (a) and a fan (20) in order from the inlet (11) to the outlet (12).
The indoor air sucked in from the heat exchanger (a) exchanges heat with the refrigerant in the heat exchanger (a) to become conditioned air of cool air or warm air, and the conditioned air is blown out of the outlet (12) through the fan (20).

Further, the heat exchanger (a) is provided with a cut (c) having a predetermined length in the width direction of the fin (b) at a predetermined position in the longitudinal direction of the fin (b), and the cut (c) is provided. ) Are formed in an inverted V-shape by bending the fin (b) so that the fin is located outside. In the bent portion (d) located above the inverted V-shaped heat exchanger (a), the fin (b)
The fins (b) are connected with a width smaller than the width of the fin (b).

Therefore, the fins are formed at the bent portion (d).
The contact between (b) and the air is not sufficiently performed, and the air flow resistance at the bent portion (d) is smaller than that of the other portions of the heat exchanger (a). For this reason, a plate-shaped sealing member is provided so as to cover the upper surface of the bent portion (d) of the heat exchanger (a).
(e) is provided, and the flow of air in the bent portion (d) is prevented by the seal member (e), so that the air flows uniformly throughout the heat exchanger (a).

[0005]

However, in the conventional heat exchanger (a), a heat exchanger formed in an inverted V-shape is used.
At the top of (a), the fin (b) located on the front side of the casing (10) and the fin (b) located on the back side are connected. Therefore, the fan of the inverted V-shaped heat exchanger (a)
In the upper part of the space on the side of (20), the wind passing through the fins (b) on the front side of the casing (10) and the wind passing through the fins (b) on the rear side collide with each other. The flow is disturbed, and the air that has passed through the heat exchanger (a)
There was a problem that the distribution did not go smoothly toward.
Then, due to the turbulence of the air flow as described above, the problem that the air flow resistance in the air passage (16) in the casing (10) is increased and the sufficient air blowing performance cannot be exhibited, and the air blowing noise is reduced. There was a problem of increasing.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to reduce turbulence of air flow inside a casing (10) to reduce air flow resistance and improve air blowing performance. To improve it.

[0007]

According to the present invention, a fin (31) forming a cross fin heat exchanger (30) is formed by a plurality of fin pieces.
(51, 52), and the fin rows (41, 42) composed of the fin pieces (51, 52) are arranged at predetermined positions, so that the turbulence of the wind flow passing through the heat exchanger (30) Is to be prevented.

More specifically, the means of the first aspect of the present invention comprises a plurality of plate-like fins (31) stacked at predetermined intervals and a heat transfer tube penetrating each of the fins (31). (32)
A cross-fin type heat exchanger (30) equipped with a heat exchanger (30) is housed in a casing (10), and the heat exchanger (30) exchanges heat with a heat medium in the air conditioner (1). I have.
Then, each fin (31) of the heat exchanger (30) is divided into a plurality of fin pieces (51, 52), and a plurality of individual fin rows (41, 52) on which the fin pieces (51, 52) are stacked. 42), and the first fin row (41) and the second fin row (42) of the plurality of fin rows (41, 42) are connected to the upper part of both fin rows (41, 42). The fins (41, 42) are arranged at predetermined intervals so as to form a gap between the fins (41, 42) so that a gap (35) is formed between them, and the wind flows from the outside to the inside of both fin rows (41, 42). On the other hand, between the first fin row (41) and the second fin row (42), the upper gap (35) of both fin rows (41, 42) is closed to close the gap (35). And sealing means for preventing the air from flowing through.

Further, the means adopted by the invention according to claim 2 is the same as the invention according to claim 1, except that the sealing means is the first means.
And a plate-like sealing member (36) provided over both upper end surfaces of the second fin row (41, 42) and extending in the longitudinal direction of both fin rows (41, 42). is there.

According to the first aspect of the present invention, the first fin row (41) and the second fin row (41)
Are arranged in a C-shape in a side view so that a gap (35) is formed between the upper portions of both fin rows (41, 42). Air flows from the outside to the inside of both fin rows (41, 42) between the fin pieces (51, 52) stacked at intervals. Further, the first and second fin rows (41, 42) are arranged so as to form a gap (35) above the two fin rows (41, 42).
The turbulence caused by the collision between the wind passing through the fin row (41) and the wind passing through the second fin row (42) is reduced, and the air passing through the heat exchanger (30) is cooled by the fan (20). Flows smoothly toward). Further, the flow of air in the gap (35) is blocked by a sealing means for closing the gap (35) between the upper portions of the two fin rows (41, 42).

According to the second aspect of the present invention, the first and second fin rows (41, 4) are formed by the plate-shaped sealing member (36).
2) The flow of air in the upper gap (35) is reliably prevented.

[0012]

Therefore, according to the first aspect of the present invention,
The air that has passed through the first and second fin rows (41, 42) can flow smoothly toward the fan (20) without colliding the air, and after passing through the heat exchanger (30). The turbulence of the air flow can be reliably reduced. As a result, the flow resistance of the air inside the device can be reduced, and the blowing performance can be improved.
Further, it is possible to surely reduce the blowing noise generated due to the turbulence of the air flow inside the device, and to improve the comfort of the occupants.

According to the second aspect of the present invention, the first
The air flow in the gap (35) between the second fin row (41, 42) and the second fin row (41, 42) can be reliably prevented by the seal member (36) having a simple shape.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, in the air conditioner of the present embodiment, a heat exchanger (30) is housed inside a casing (10), and a fan (20) is housed. It is configured as a wall-mounted indoor unit (1) that performs the following.

In the casing (10), a suction port (11) is formed from the upper part of the front surface to the upper part, while an outlet (12) is formed in the lower part of the front part. An air passage (1) communicating from the suction port (11) to the air outlet (12)
6) is formed. Then, the room air drawn into the casing (10) from the suction port (11) by the fan (20) flows through the air passage (16) and exchanges heat with the refrigerant in the heat exchanger (30) to become conditioned air. This conditioned air fan (20)
Through the outlet (12) and into the room. Drain receiving portions (15) are formed below both ends of the heat exchanger (30), while the casing
The outlet (12) of (10) is provided with a vertical flap (13) and a horizontal flap (14), and both flaps (13, 14) control the wind direction of the conditioned air blown out of the outlet (12). It is configured to be adjustable.

The fan (20) is composed of a cross-flow fan having a large number of blades arranged on a circumference and formed in a cylindrical shape. By rotating around the axis, room air is sucked from the suction port (11) of the casing (10) and is blown out from the air outlet (12).

The heat exchanger (30) is a feature of the present invention, and includes a plurality of plate-like fins (31) stacked with a predetermined fin pitch and each of the fins (31). And a heat transfer tube (32) penetrating the heat exchanger. And the heat exchanger (30)
When room air flows between the fins (31) of the heat exchanger (30), the room air exchanges heat with the refrigerant flowing through the heat transfer tubes (32) to produce conditioned air of warm air or cool air. It is configured to generate.

The heat transfer tube (32) includes a plurality of straight pipe portions (33) penetrating through the respective fins (31).
3) The connecting pipe section connects

The fins (31) are first to third fin pieces (51 to 53), each of which has three substantially rectangular first fin pieces (5).
1), a second fin piece (52), and a third fin piece (53), each of which is a first to third fin row (41 to 43) in which the fin pieces (51 to 53) are laminated. The first fin row (41) and the second
A fin row (42) and a third fin row (43) are formed, and in each of the fin rows (41 to 43), the surface on the side of the fan (20) faces the back, and the suction port of the casing (10) is opened. (11) The side is the front. In each of the fin rows (41 to 43), each fin row (41 to
43), the straight pipe portions (33) of the heat transfer tubes (32) are arranged alternately on the front side and the back side at a predetermined pitch to form a so-called two-row staggered pipe arrangement. The first pipe row (34a) of the first row is constituted by straight pipe sections (33) located on the front side of each fin row (41 to 43), and the straight pipe sections (33) located on the back side. A second tube row (34b) of the second row is constituted.

The second and third rows of fins (42, 43) are arranged on the front side of the casing (10) rather than the fan (20) inside the casing (10).
2, 43) are arranged in the vertical direction, and the fin pieces (52, 53) of both fin rows (42, 43) are arranged in such a posture that the longitudinal directions thereof maintain a predetermined obtuse angle with each other, and one fin row group ( 45).

The third fin row (43) is formed as a rectangular flat plate having four corners formed at right angles, and both the upper end face and the lower end face are slightly raised rearward. Further, the third
At the corner of the fin piece (53) on the front side of the upper end, the first
The straight pipe section (33) of the pipe row (34a) is arranged, and the straight pipe section (33) of the second pipe row (34b) is arranged at the corner at the lower rear side. A drain receiving portion (15) is formed below the third fin row (43).

The second fin piece (52) is a third fin piece.
It is formed in a substantially rectangular plate shape that is about twice as long as (53), the upper and lower corners on the front side are formed at right angles, and the corner on the lower back side of the second fin piece (52) is at a predetermined angle. It is formed at a circular arc corner (52b) of a radius. Further, the second fin piece
Both the upper and lower end faces of (52) are formed to descend downward, while the straight pipe section (33) of the first pipe row (34a) is provided at the corner on the upper front face side with an arc corner on the lower rear face side. Section (52b) has a second tube row
The straight pipe part (33) of (34b) is arranged.

In other words, the second fin row (42) and the third fin row (43) are such that drain water generated by the second fin piece (52) collects at the arc corner (52b) on the back side of the lower end, The arc corner (5
2b) so as to be transmitted to the third fin piece (53).

In the second fin row (42) and the third fin row (43), the arc corner (52b) of the second fin piece (52) on the lower rear surface side is the third fin piece (53). ) Is located at the center of the upper end face of the second fin row (42), and the corner point on the front side of the lower end of the second fin row (42) is substantially the same as the corner point on the front side of the upper end of the third fin row (43). It is arranged in the front-back direction position.

The first fin piece (51) is a second fin piece.
It is formed in a substantially rectangular flat plate having the same length as that of (52), and the upper and lower corners on the back side (lower side in FIG. 1) are formed at right angles, while the upper end on the front side (upper side in FIG. 1). ) Is cut off to form a notch corner (51a), and the corner on the front side of the lower end is formed as an arc corner (51b) having a predetermined radius.
Further, both the upper end face and the lower end face of the first fin piece (51) are formed to be lowered forward, while the straight pipe part (33) of the second pipe row (34b) is provided at the corner on the upper rear face side. The straight pipe section (33) of the first pipe row (34a) is arranged at the arc corner (51b) on the front side of the lower end. A drain receiving portion (15) is formed below the first fin row (41).

The first fin row (41) and the second fin row (42) are fin pieces (5) in both fin rows (41, 42).
1,52) form an acute angle with each other, and both fin rows
(41, 42) are arranged so as to keep a predetermined interval between the upper portions,
A gap (35) is formed between the upper portions of both fin rows (41, 42). In addition, the notch corner (51a) of the first fin piece (51) avoids interference with the casing (10) and reduces the vertical height.

Further, the first and second fin rows (41, 42)
A seal member (36) is provided on the upper part of the box. The sealing member (36) is provided with a gap (35) between both fin rows (41, 42).
Is provided over both fin rows (41, 42) so as to close the fin row, and is formed in a plate shape extending in the longitudinal direction of both fin rows (41, 42). Specifically, the first and second fin rows (41,
42), and covers the upper end surface of the first fin row (41), while covering the upper end face of the second fin row (42).
It is provided so as to cover approximately half the width of the fin piece (52). The seal member (36) is provided with the gap (3
5) It is configured to block the flow of air in.

-Operation-The operation at the time of air-conditioning operation will be described. The fan (20) is rotated by a fan motor to draw room air from the suction port (11) into the interior of the casing (10). Flows to exchanger (30). A refrigerant flows inside the heat transfer tube (32) of the heat exchanger (30), and the refrigerant and the room air exchange heat. During the cooling operation, the refrigerant evaporates in the heat transfer tube (32), and at the same time, the room air is cooled to become conditioned air as cool air, while in the heating operation, the refrigerant condenses in the heat transfer tube (32) at the same time. Then, the room air is heated to be conditioned air that is hot air. And this conditioned air is a fan (20)
The air is then blown into the room again from the air outlet (12), thereby cooling or heating the room.

During the air-conditioning operation, the indoor air flows in the casing (10) in a direction from the suction port (11) to the fan (20) and through the heat exchanger (30). A seal member (36) is attached to the upper part of the first and second fin rows (41, 42), and the seal member (3
6) prevents air from flowing through the gap (35) formed between the two fin rows (41, 42), so that all indoor air sucked from the suction port (11) passes through the heat exchanger (30). Flow through. When the room air passes through both fin rows (41, 42), it flows in a direction substantially orthogonal to both fin rows (41, 42). On the other hand, a gap (35) is formed between the upper portions of both fin rows (41, 42) so as to maintain a predetermined interval, and a gap (35) is formed between the upper portions of both fin rows (41, 42). In the upper part of the fin rows (41, 42), the distance between the backs of the two fin rows (41, 42) is at a certain distance, and both fin rows (4
The air passing through (1, 42) flows smoothly toward the fan (20) without colliding with each other.

When the indoor air is cooled in the heat exchanger (30) as described above, the fin pieces (51-53) of each fin row (41-43) forming the heat exchanger (30) are formed. ), Drain water is generated by condensation of moisture contained in room air. The drain water generated on the first fin pieces (51) of the first fin row (41) flows down along the surface of the first fin pieces (51), and the first fin row (41)
It flows to a drain receiving portion (15) provided at the lower part of the casing, and then is discharged outside the casing (10). On the other hand, the drain water generated in the second fin pieces (52) of the second fin row (42) flows down along the surface of the second fin pieces (52) and flows to the arc corner (52b) on the back side of the lower end. And gather. At this time, the arc-shaped corner (52b) of the second fin piece (52) is located at the center in the width direction of the upper end face of the third fin piece (53) of the third fin row (43). Since the upper end surface of the three fin piece (53) is configured to rise rearward, the second fin piece (53) is formed.
The drain water reaching the arc corner (52b) of (52) is
It flows down to the third fin piece (53) without being scattered with the room air passing through (30). This third fin piece (5
The drain water flowing to the third fin piece (53) flows down the third fin piece (53) together with the drain water generated on the surface of the third fin piece (53), and is provided at a lower portion of the third fin row (43). It flows to the section (15) and is then discharged out of the casing (10).

According to the present embodiment, the turbulence of the air flow after passing through the heat exchanger (30) can be reliably reduced. This results in the casing (1
0) The air flow resistance in the air passage (16) formed inside can be reduced, and the blowing performance of the indoor unit (1) can be improved. Further, the blowing noise generated due to the turbulence of the air flow in the air passage (16) can be reliably reduced, and the comfort of the occupants can be improved.

During cooling operation, each fin row (41-43)
The moisture in the air condenses on the surface of the fin pieces (51-53) to generate drain water. According to the present embodiment, the second fin row (4
The drain water generated in the second fin piece (52) of 2) is transferred to a heat exchanger.
(30) without scattering from the third fin row (43)
It can flow to the fin pieces (53). As a result, in any operation state, it is possible to prevent the drain water generated in the heat exchanger (30) from scattering from the heat exchanger (30) and being blown out together with the conditioned air, thereby performing the cooling operation reliably. be able to.

Further, since the heat exchanger (30) is formed by a plurality of separate fin rows (41 to 43), the second
An arc-shaped corner (52b) on the back side of the lower end of the second fin piece (52) of the fin row (42) can be provided at the center in the width direction of the upper end face of the third fin row (43). As a result, the heat exchanger (30)
Indoor unit (1) that can reduce the overall depth
Can be reduced in size.

Further, since the corner portion on the front side of the upper end of the first fin piece (51) is formed as a notched corner portion (51a), the heat exchanger (3) is formed.
0) The overall height can be reduced, and as a result, the indoor unit (1) can be reduced in size.

-Other Embodiments- In the above embodiment, the fin (31) is divided into three first to third fin pieces (51 to 53).
The number of divisions is not limited to three, but may be two or four or more.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a configuration of an indoor unit according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a configuration of a conventional indoor unit.

[Explanation of symbols]

 (10) Casing (30) Heat exchanger (31) Fin (32) Heat transfer tube (35) Gap (36) Seal member (41) First fin row (42) Second fin row (51) First fin piece ( 52) Second fin piece

Claims (2)

[Claims] 1. A cross-fin type heat exchanger comprising a plurality of plate-like fins (31) stacked at predetermined intervals and a heat transfer tube (32) passing through each of the fins (31). In the air conditioner in which the heat exchanger (30) is housed in the casing (10) and the heat medium and the air exchange heat with the heat exchanger (30), each fin (31) of the heat exchanger (30) has a plurality of fins (31). Fin pieces (5
1,52) to form a plurality of individual fin rows (41,42) in which the respective fin pieces (51,52) are laminated. The first of the plurality of fin rows (41,42) Fin row (4
The first fin row (42) and the second fin row (42) are arranged at predetermined intervals in a C-shape in a side view so that a gap (35) is formed between the upper portions of both fin rows (41, 42). And while it is comprised so that wind may circulate from the outside of both fin row (41,42) to the inside, between the said 1st fin row (41) and the 2nd fin row (42) The air conditioner according to claim 1, further comprising sealing means for closing a gap (35) at an upper portion of the two fin rows (41, 42) to prevent air from flowing through the gap (35). 2. The air conditioner according to claim 1, wherein the sealing means is provided over both upper end surfaces of the first and second fin rows (41, 42), and the both fin rows (41, 42) are provided. 42) An air conditioner characterized by a plate-shaped sealing member (36) extending in the longitudinal direction of the air conditioner.