JP2005201466A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein evaporating capacity is reduced because condensed water tends to stay between fins at the bottom part of a heat exchanger to reduce the amount of heat exchange between the fins and air as compared with the other part. <P>SOLUTION: This heat exchanger is provided with upper side fins 12a and lower side fins 12b divided in the flow direction of air, and heat exchanger tubes 13 passing through orthogonally to the respective fins. The fin spacing and fin width of the fins 12b are made larger than those of the fins 12a. The amount of condensed water held in the fin 12b part can thereby be reduced to improve the amount of heat exchange between the fins 12b and air. As a result, evaporating capacity can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fin-and-tube type heat exchanger that is used in an air conditioner or the like and performs heat exchange between a refrigerant and a fluid such as air.

  Conventionally, this type of heat exchanger supplies heat energy of the refrigerant passing through the heat transfer tube to the air in the vicinity of the fin by passing the heat transfer tube through one fin.

FIG. 3 shows a conventional heat exchanger, and the heat exchanger 11 is composed of fins 12 and heat transfer tubes 13.
JP-A-1-28494

  However, in the conventional configuration, when the heat exchanger is used as an evaporator, the condensed water condensed when air passes through the heat exchanger is likely to accumulate between the fins at the bottom of the heat exchanger. The amount of heat exchange between the fins and air is smaller than that in other locations, and there is a problem that the evaporation capacity is reduced.

  This invention solves the said conventional subject, and it aims at providing the heat exchanger which reduces the holding | maintenance amount of the condensed water in a heat exchanger bottom part.

  In order to solve the above-mentioned conventional problems, the heat exchanger according to the present invention is configured such that fins are divided in the air flow direction, and the interval between the fins on the lower side and the width of the fins are larger than those on the upper side. It is. As a result, when the heat exchanger is used as an evaporator, the gap between the fins is increased, so that the amount of condensed water retained at the bottom of the heat exchanger can be reduced, thereby improving the evaporation capacity. Furthermore, by increasing the fin width, the total area of the fins can be made the same as before the gap between the fins is increased, so that the condensing capacity when the heat exchanger is used as a condenser can be maintained.

  Moreover, the heat exchanger of this invention provides the drainage means between the said fins divided | segmented into the flow direction of air. As a result, the condensed water condensed on the upper side of the divided fins does not flow into the bottom of the heat exchanger, so that not only can the evaporation capacity be improved by significantly reducing the amount of condensed water held at the bottom of the heat exchanger. Further, the degree of freedom in designing the interval between the fins on the lower side and the width of the fins is widened.

  The heat exchanger of the present invention can improve the evaporation capacity because the amount of condensed water accumulated between the fins at the bottom of the heat exchanger can be reduced.

In the first invention, the fins are divided in the flow direction of the external fluid, and the fin interval on the lower side and the fin width are made larger than the upper part, so that when the heat exchanger is used as an evaporator, the fin interval is increased. Since the amount of condensed water retained at the bottom of the heat exchanger is reduced, the evaporation capacity is improved, the passage area of the fins is increased, and the power consumption of the blower can be reduced. Furthermore, by increasing the fin width, the total area of the fins can be made the same as before increasing the fin interval, so that the condensing capacity when the heat exchanger is used as a condenser can be maintained.

  In the second invention, in particular, the heat exchanger according to the first invention is provided with drainage means between the fins divided in the air flow direction, so that the condensed water condensed on the upper side of the divided fins can be obtained. Since it does not flow into the bottom of the heat exchanger, not only can the evaporation capacity be improved by significantly reducing the amount of condensed water retained at the bottom of the heat exchanger, but also the freedom in designing the gap between the fins and the width of the fins. spread. Furthermore, by changing the shape of the drainage means, it is possible to function as a wind direction changing plate, so that wind noise in the heat exchanger can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of a heat exchanger according to the first embodiment of the present invention. In FIG. 1, the heat exchanger 11 is divided into an upper fin 12a divided in the flow direction in the air flow direction, a lower fin 12b having a fin interval and fin width larger than the upper portion, and orthogonal to the fin 12a and the fin 12b. It is comprised from the heat exchanger tube 13 penetrated so that it might do.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, by passing the heat transfer tubes through the fins 12a and 12b, the heat energy of the refrigerant passing through the heat transfer tubes 13 is supplied to the air near the fins 12a and 12b via the fins 12a and 12b.

  As described above, in the present embodiment, the heat exchanger 11 is used as an evaporator by making the fin 12b at the bottom of the heat exchanger 11 larger than the fin 12a and by increasing the fin width. In this case, the amount of condensed water retained at the bottom of the fin 12b is reduced, and the amount of heat exchange between the fin 12b and air is increased, so that the evaporation capability can be improved. Furthermore, since the total area of the fins 12b can be made the same as before the fin interval is increased, the condensing capacity when the heat exchanger is used as a condenser can be maintained.

(Embodiment 2)
FIG. 2 is a perspective view of the heat exchanger according to the second embodiment of the present invention. In FIG. 2, the heat exchanger 11 is orthogonal to the fins 12a on the upper side divided in the flow direction in the air flow direction, the fins 12b on the lower side with the fin interval and fin width larger than the upper part, and the fins 12a and 12b. The heat transfer tube 13 is made to penetrate therethrough and the drainage means 14 installed between the fins 12a and 12b.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, by passing the heat transfer tubes through the fins 12a and 12b, the heat energy of the refrigerant passing through the heat transfer tubes 13 is supplied to the air near the fins 12a and 12b via the fins 12a and 12b.

  As described above, in the present embodiment, by providing the drainage means 14 between the fins 12a and 12b divided in the air flow direction, the condensed water condensed by the fins 12a is guided to the drainage means 14 and drained. Therefore, since the condensed water condensed by the fin 12a does not flow into the fin 12b, not only can the evaporation capacity be improved by greatly reducing the amount of condensed water retained at the bottom of the heat exchanger, but also the spacing between the fins 12b and the fins 12b. The degree of freedom of design is widened.

As described above, since the heat exchanger according to the present invention can reduce the amount of condensed water held at the bottom of the heat exchanger and thus can improve the evaporation capacity, it can be applied to uses such as an air conditioner. .

The perspective view of the heat exchanger in Embodiment 1 of this invention The perspective view of the heat exchanger in Embodiment 2 of this invention A perspective view of a conventional heat exchanger

Explanation of symbols

12, 12a, 12b Fin 13 Heat transfer tube 14 Drainage means

Claims (2)

The fins are stacked at intervals and arranged in one or more rows in the flow direction of the external fluid, the heat transfer tubes passing through the fins so as to be orthogonal to each other, and the fins are divided in the flow direction of the external fluid. The heat exchanger according to claim 1, wherein the fin interval and the fin width are made larger than the upper part. The heat exchanger according to claim 1, wherein drainage means is provided between the fins divided in the flow direction of the external fluid.

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