JP3613272B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner, and more particularly to a structure of a heat exchanger in the air conditioner.
[0002]
[Prior art]
A conventional air conditioner (for example, Japanese Utility Model Laid-Open No. 64-53818) will be described with reference to FIG. FIG. 2 is a longitudinal sectional view of the indoor unit of the air conditioner. In the figure, 51 is a box-shaped casing. A suction port 52 is formed on the upper surface of the casing 51 and a blow-out port 53 is formed on the lower part of the front surface. A cross flow fan 54 is provided below the inside of the casing 51. Between the suction port 52 and the cross flow fan 54, a heat exchanger 55 is disposed in which a large number of cooling fins 55a, 55a,. The air sucked from the suction port 52 by the cross flow fan 54 is heat-exchanged by the heat exchanger 55 and blown out from the air outlet 53. Furthermore, in this air conditioner, the height of the casing 51 is suppressed by inclining the heat exchanger 55 rearward to achieve a compact size.
[0003]
[Problems to be solved by the invention]
When the heat exchanger 55 is tilted in this way, the horizontal projection area of the heat exchanger 55 is increased, so that the depth dimension of the casing is increased, and the casing cannot be thinned. In addition, all the dew condensation generated on the surface of the heat exchanger 55 is collected in the drain pan 56 originally disposed on the lower side. However, since the heat exchanger 55 is inclined, the drain water is supplied to the heat exchanger 55. When this drain water gathers on the back side and descends to the vicinity of the cross flow fan 54 through the back side, it is scattered by the air flow passing through the heat exchanger 55, and this is sprayed out from the outlet 53 in the form of a mist. There is a problem of being. In order to solve this problem, in the air conditioner of FIG. 2, the lower part of the front surface of the heat exchanger 55 is blocked to prevent the inflow of airflow, but this requires a separate blocking member 57. Incurs an increase in manufacturing costs.
[0004]
The present invention has been made in order to solve the above-described conventional drawbacks, and its purpose is basically to adopt a configuration in which the heat exchanger is inclined to suppress the casing height while reducing the casing height. It is intended to provide an air conditioner that can reduce the thickness of the casing by reducing the length of the casing and can prevent the drain water from blowing out without providing a blocking member in the heat exchanger.
[0005]
[Means for Solving the Problems]
Therefore, the air conditioner according to claim 1 is an air conditioner in which a heat exchanger is disposed between a suction port on the front surface or the upper surface of the casing and a cross flow fan provided in the casing. A first heat exchanger 7 that is substantially upright on the drain pan 6 between the front face 1a and the crossflow fan 4, and a second heat exchanger that is connected to the upper side of the first heat exchanger 7 and is inclined rearward. 8, the thickness of the second heat exchanger 8 before and after the first heat exchanger 7 is made thicker, and the first heat exchanger 7 and the second heat exchanger 8 are connected to each other. It is characterized by being arranged so that the back surfaces coincide with each other.
[0006]
In this air conditioner, the casing height is suppressed by the inclined arrangement of the second heat exchanger 8. In the space before and after the cross flow fan that governs the depth dimension of the casing 1, the first heat exchanger 7 is disposed on the front side of the cross flow fan 4, and the first heat exchanger 7 is upright and second. Since it is formed thinner than the heat exchanger 8, the depth dimension of the casing 1 is shortened accordingly. Further, the first heat exchanger 7 stands upright, and the first heat exchanger 7 and the second heat exchanger 8 are arranged so that the backs thereof coincide with each other at the connecting portion, so that the drain water is cross-flowed. In the vicinity of the fan 4, it will descend uniformly over almost the entire surface of the cooling fin, and will be collected in the drain pan 6 without being scattered by the air flow.
[0007]
The air conditioner according to claim 2 is the air conditioner according to claim 1, wherein the number of the heat transfer tubes 7 b of the first heat exchanger 7 is different from the number of the heat transfer tubes 8 b of the second heat exchanger 8. And the thickness of the second heat exchanger 8 before and after the first heat exchanger 7 is made thicker than the first heat exchanger 7 in accordance with the difference in the number of arrangements.
[0008]
In this air conditioner, the second heat exchanger 8 is thicker than the first heat exchanger 7 in accordance with the difference in the number of arrangements. The heat exchange capacity per unit area is larger in the second heat exchanger 8 than in the first heat exchanger 7, but the distance from the cross flow fan 4 is greater in the second heat exchanger than in the first heat exchanger 7. Since 8 is far away, heat exchange by the heat exchangers 7 and 8 is performed uniformly.
[0011]
The air conditioner according to claim 3 is the air conditioner according to claim 2, wherein the heat transfer tubes 7b and 8b are arranged in one row in the first heat exchanger 7 and in two rows in the front and rear in the second heat exchanger 8. It is characterized by having.
[0012]
In this air conditioner, the second heat exchanger 8 is thicker than the first heat exchanger 7 according to the difference in the number of arrangements. Further, the heat exchange capacity per unit area is larger in the second heat exchanger 8 than in the first heat exchanger 7, but the distance from the cross flow fan 4 is the second heat exchange than in the first heat exchanger 7. Since the unit 8 is separated, heat exchange by the heat exchangers 7 and 8 is performed uniformly.
[0013]
Furthermore, the air conditioner according to claim 4 is the air conditioner according to any one of claims 1 to 3 , wherein the lower end front portion 8 c of the second heat exchanger 8 is substantially on the front surface 7 c of the first heat exchanger 7. It is characterized by being cut diagonally so as to align.
[0014]
In this air conditioner, for example, when the two heat exchangers 7 and 8 are arranged so that the back surfaces thereof coincide with each other in the connecting portion, the lower end front portion 8c of the second heat exchanger 8 is substantially the front surface of the first heat exchanger 7. 7c, the depth dimension of the casing 1 is further shortened.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, specific embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention.
[0016]
In the figure, reference numeral 1 denotes a box-shaped casing. A suction port 2 is formed at the upper part and a blower port 3 is formed at the lower part of the front surface 1a of the casing 1, and a cross flow fan 4 is provided at the lower part inside the casing 1. A heat exchanger 5 is disposed between the suction port 2 and the cross flow fan 4. The air sucked from the suction port 2 by the cross flow fan 4 is heat-exchanged by the heat exchanger 5 and blown out from the air outlet 3.
[0017]
The heat exchanger 5 is connected to the first heat exchanger 7 standing upright on the drain pan 6 between the casing front face 1a and the cross flow fan 4, and connected to the upper side of the first heat exchanger 7 and to the rear. The second heat exchanger 8 is inclined. The first heat exchanger 7 is formed by reciprocating and penetrating a heat transfer tube 7b through a large number of cooling fins 7a, 7a,... Arranged in parallel in the lateral direction (direction perpendicular to the drawing sheet). When the section 7 is vertically sectioned and viewed from the side as shown in the figure, one row of heat transfer tubes 7b are arranged. On the other hand, the second heat exchanger 8 is formed by reciprocating and penetrating the heat transfer tubes 8b, 8b through a large number of cooling fins 8a, 8a,. The heat transfer tubes 8b are arranged in two rows in the front-rear direction as viewed from the side in a longitudinal section. Therefore, the thickness of the second heat exchanger 8 is larger than that of the first heat exchanger 7. Moreover, although both the heat exchangers 7 and 8 are arrange | positioned so that a back surface may correspond in a connection part, the lower end front part 8c of the 2nd heat exchanger 8 is substantially on the front surface 7c of the 1st heat exchanger 7. It is cut diagonally so as to align. Reference numeral 9 denotes a tongue for the cross flow fan 4.
[0018]
In the air conditioner having the above configuration, the casing height is suppressed by the inclined arrangement of the second heat exchanger 8. In the space before and after the cross flow fan that governs the depth dimension of the casing 1, the first heat exchanger 7 is disposed on the front side of the cross flow fan 4. The first heat exchanger 7 is upright and 2 Since the heat exchanger 8 is formed thinner than the heat exchanger 8, the depth dimension of the casing 1 is shortened accordingly and can be thinned. Further, since the drain water of the second heat exchanger 8 travels down the cooling fins 8 a to the first heat exchanger 7, the drain water of both the heat exchanges 7 and 8 is the first heat in the vicinity of the cross flow fan 4. It descends along the cooling fins 7a of the exchanger 7. In that case, since the 1st heat exchanger 7 is standing upright, drain water will descend | fall uniformly through the whole surface of the cooling fin 7a of the 1st heat exchanger 7, and will be scattered by an air flow. It is collected in the drain pan 6 without. Accordingly, the drainage of the drain water can be prevented without providing a closing member in the heat exchanger 7 as in the conventional example, and the manufacturing cost can be reduced.
[0019]
Further, the heat exchange capacity per unit area is larger in the second heat exchanger 8 than in the first heat exchanger 7, but the distance from the cross flow fan 4 is the second heat exchange than in the first heat exchanger 7. Since the unit 8 is separated, heat exchange by the heat exchangers 7 and 8 is performed uniformly, and condensation due to a mixed flow of air having a temperature difference can be prevented.
[0020]
Furthermore, since the lower end front portion 8c of the second heat exchanger 8 is substantially aligned with the front surface of the first heat exchanger 7, the depth dimension of the casing 1 is further shortened, and the casing 1 can be further thinned.
[0021]
In the above-described embodiment, the suction port 2 is formed on the front surface 1a of the casing 1. However, the present invention can also be applied to a case where the suction port is formed on the upper surface of the casing and on the front surface and the upper surface. . Moreover, although the blower outlet 3 was formed in the front surface 1a of the casing 1 in the said embodiment, this invention is applicable also to what formed the blower outlet in the bottom face of a casing, and both the front surface and the bottom face.
[0022]
【The invention's effect】
As described above, in the air conditioner of claim 1, the casing height is suppressed by the inclined arrangement of the second heat exchanger, and the depth dimension of the casing is shortened by the upright arrangement and thinning of the first heat exchanger. The casing can be thinned while being lowered. In addition, since the drain water descends uniformly over almost the entire surface of the cooling fin of the first heat exchanger near the cross flow fan, it is possible to prevent the drain water from being blown out without providing a blocking member in the heat exchanger. The manufacturing cost can be reduced.
[0023]
According to the second aspect of the present invention, heat exchange by the first heat exchanger and the second heat exchanger is performed uniformly, and condensation due to a mixed flow of air having a temperature difference can be prevented.
[0025]
According to the third aspect of the present invention, heat exchange by the first heat exchanger and the second heat exchanger is uniformly performed, so that dew condensation due to a mixed flow of air having a temperature difference can be reliably prevented.
[0026]
Further, according to the fourth aspect , the depth dimension of the casing is further shortened, and the casing can be thinned.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embodiment of an air conditioner according to the present invention.
FIG. 2 is a longitudinal sectional view for explaining a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 1a Front surface 2 Suction port 4 Cross flow fan 5 Heat exchanger 6 Drain pan 7 1st heat exchanger 7b Heat transfer tube 7c Front surface 8 Second heat exchanger 8b Heat transfer tube 8c Lower end front

Claims (4)

In an air conditioner in which a heat exchanger is disposed between a suction port on the front or upper surface of a casing and a cross flow fan provided in the casing, the heat exchanger (5) is connected to the casing front (1a) and the cross flow fan. A first heat exchanger (7) almost upright on the drain pan (6) with the second heat exchanger (4), and a second heat connected to the upper side of the first heat exchanger (7) and inclined rearward The second heat exchanger (8) is formed thicker than the first heat exchanger (7), and the first heat exchanger (7) and the second heat are further formed. The exchanger (8) is an air conditioner that is arranged so that the backs thereof coincide with each other at the connecting portion. A difference is provided between the number of heat transfer tubes (7b) of the first heat exchanger (7) and the number of heat transfer tubes (8b) of the second heat exchanger (8). The air conditioner according to claim 1, wherein the thickness of the second heat exchanger (8) is larger than that of the first heat exchanger (7). The air according to claim 2, characterized in that the heat transfer tubes (7b) (8b) are arranged in one row in the first heat exchanger (7) and in two rows in the front and rear in the second heat exchanger (8). Harmony machine. The lower end front portion (8c) of the second heat exchanger (8) is cut obliquely so as to be substantially aligned with the front surface (7c) of the first heat exchanger (7). The air conditioner according to claim 3 .

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