JPS62175591A - Fin tube type heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanging efficiency by a method wherein raised- slotted parts are provided on a plate fin at the diagonally downstream side of a heat transfer tube. CONSTITUTION:Raised-slotted parts 16 are provided on the downstream side of a plate fin 11 at the diagonally downstream parts of heat transfer tubes 13. Refrigerant flows through the inside of the heat transfer tubes 13 and the heat thereof is transferred to a fin 11 through fin collars 12, adhered and fixed to the heat transfer tubes 13 whereby heat exchange between the refrigerant and gas is effected. In this case, the gas, flows into a heat exchanger from the direction of the arrow sign 5 in a diagram, collides against the raised-slotted parts 16 whereby the gas can be turned into the back stream parts of the heat transfer tubes 13 and, as a result, dead water area 14b in the back stream side of the heat transfer tubes may be reduced remarkably as compared with the dead water area so far. According to this effect, the areas of the heat transfer tube 13 and the fin 11, which contact with airflow, may be increased and heat exchanging capacity may be improved significantly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fin-tube heat exchanger used in cooling systems such as air conditioning equipment, refrigeration equipment, and refrigeration equipment.

2. Description of the Related Art In recent years, equipment has become smaller and thinner, and fin-tube heat exchangers, which are important components along with compressors, are also desired to be smaller, thinner, and have higher performance.

An example of a conventional fin-tube heat exchanger will be described below with reference to the drawings. FIG. 4 shows a partial cross-sectional view of a conventional fin-tube heat exchanger. Plate fin 1
Then, heat exchanger tube insertion holes are bored and fin collars 2 are raised at equal intervals, and after the heat exchanger tubes 3 are inserted through them, they are tightly attached and fixed to the plate-shaped fins 1 by means such as tube expansion. Heat exchanger tube 3
A refrigerant is made to flow inside, and the heat is transmitted to the fins 1 from the fin collar 2 closely fixed to the heat transfer tube 3. On the other hand, when the gas flows in the direction of the white arrow 6 and passes over the fins 1, heat is exchanged due to the temperature difference between the gas, the heat transfer tubes 3, and the fins 1, and this action causes heat exchange between the refrigerant and the gas. It is done continuously.

Problems to be Solved by the Invention Among the effects described above, when gas flows in the direction of arrow 6, 1. In the downstream portion of the heat exchanger tube 3, airflow stagnation portions, so-called dead zones 4a and 4b, occur. Especially the downstream heat exchanger tube 3
The area of the dead zone 4b that occurs downstream of the heat exchanger tube 3 is large, and heat exchange between the heat exchanger tube 3 in which the refrigerant flows as a heat source and the fin at the highest temperature near the heat exchanger tube is hindered, resulting in a very low heat exchange efficiency. It had the problem of being bad.

Means for Solving the Problems In order to solve the above problems, the fin-tube heat exchanger of the present invention has plate-shaped fins arranged in parallel at predetermined intervals and through which airflow flows, and plate-shaped fins arranged in parallel at predetermined intervals. It consists of a heat exchanger tube inserted through the fins at right angles, and a cut-and-raised portion is provided at an oblique downstream portion of the heat exchanger tube at the downstream portion of the plate-shaped fin.

Function The present invention, with the above-described configuration, significantly reduces the dead area generated downstream of the transmission pipe by cutting and raising it, thereby increasing the heat exchange efficiency.

EXAMPLE An example of the present invention will be described below with reference to the drawings. In the figure, heat transfer tube insertion holes are bored in plate-like fins 11, fin collars 12 are stood up at equal intervals, heat transfer tubes 13 are inserted through these holes, and then the heat transfer tubes 13 are tightly fixed to plate-like fins 11 by means such as tube expansion. Configure. At the downstream part of the plate-like fin 11, there is a cut-and-raised part 16 diagonally downstream of the heat exchanger tube 13.
has been established. The effect will be explained below. A refrigerant is made to flow inside the heat exchanger tube 13, and its heat is transmitted from the fin collar 12 closely fixed to the heat exchanger tube 13 to the fins 11, so that heat exchange between the refrigerant and the gas is continuously performed. On this occasion,
The gas flowing in from the direction of the white arrow 15 is cut and raised 1
By colliding with
can be significantly reduced compared to conventional methods. Due to this effect, the area of the heat exchanger tubes 13 in contact with the airflow of the fins 11 increases, and the heat exchange ability can be greatly improved.

Effects of the Invention As described above, the present invention reduces the dead area by providing the plate-shaped fin with a cut-and-raised portion diagonally downstream of the heat transfer tube.
This greatly improves heat exchange efficiency.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fin-tube heat exchanger according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the heat exchanger, FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2, and FIG. is a partial sectional view of a conventional heat exchanger. 11...Plate fin, 12...Fin collar, 13...Heat transfer tube, 16...Cut and raise. Name of agent Patent attorney Toshio Nakao and 1 other person

Claims (1)

[Claims] It consists of a large number of plate-shaped fins arranged in parallel at predetermined intervals, through which air flows, and a heat exchanger tube inserted at right angles to the plate-shaped fins. A fin-tube heat exchanger characterized by having a cut-and-raised part on the diagonal downstream part.