JPH04327731A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger possessing fins which does not suffer from clogging with dust. CONSTITUTION:In a heat exchanger including fins, a refrigerant tube, and a fan in combination, a streamline protruded part 6 is provided at an end part 2a which is located at a front surface side of an air suction inlet of the fin 2. Further, an air stream flowing through the streamline protruded part 6 is widened into a turbulent flow to ensure a heat exchanger to which any dust is unlikely to stick.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an air-cooled, fin-tube type heat exchanger.

0002

[Prior art] Air-cooled, fin-tube heat exchanger (condenser) used in conventional air conditioners, etc.
1 is composed of a large number of parallel fins 2 and a refrigerant tube 8 passing through them, as shown in FIGS. It has a configuration that allows it to pass through to the rear. In this case, each fin 2 has a structure in which thin plates are arranged parallel to the air flow (for example, in Japanese Utility Model Publication No. 57-26137
(Refer to Utility Model Publication No. 58-42843).

0003

[Problems to be Solved by the Invention] For this reason, the heat exchanger 1
The air flow A accompanying the rotation of the fan 4 flows from the front surface 1a of the air inlet port through two groups of fins to the rear. As shown in Figure 7, the fiber dust that moves even in a slight breeze forms an acute angle with the forces of f1 and f1' due to the airflow, making it difficult to flow away due to the friction effect of the edges, creating a trigger for so-called dust accumulation, and eventually causing the air to There is dust on the front part of the suction port.
Dust accumulates, blocking ventilation and reducing the ventilation flow rate (heat exchange capacity). Currently, as a means to solve this problem, a removable filter is installed at the front of the intake air of the heat exchanger so that the filter can be cleaned when it becomes clogged with dust. was troublesome.

[0004] In view of the above-mentioned circumstances, an object of the present invention is to provide a heat exchanger that solves the above-mentioned problems by improving the shape of the edge of the fin to be a streamlined protrusion.

[0005]

[Means for Solving the Problems] The present invention consists of a large number of fins arranged in parallel at regular intervals and through which airflow flows, and a heat transfer pipe inserted through the fins, the windward end of the fin being It is formed into a streamlined shape.

[0006]

[Function] As mentioned above, a streamlined protrusion with a small coefficient of friction is provided at the end of each fin arranged in parallel, which is the front surface of the air suction port, so that the airflow toward the protrusion is f2
The fiber becomes a force of f2' and is greatly expanded, and the turbulent flow effect of the thread makes it easy to lose the balance of force, reducing the probability of fiber stagnation.

[0007]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on drawings of embodiments.

FIGS. 1 and 2 are a plan view and a perspective view showing the main parts of the fins of a heat exchanger that is a fin-tube type condenser. A heat exchanger 1 with a streamlined protrusion 6 having a small friction coefficient is provided on the end (front edge) 2a of each fin 2 on the windward side (in front of the air suction port) of the fins of the exchanger, so that dust does not easily adhere to the heat exchanger 1. Configure.

Next, to explain this effect, first, when using a heat exchanger in an air conditioner, for example, when the fan 4 rotates when the engine is operating, the air flow A flows from the front side of the air suction port 1a to the rear side. In this case, fin 2
Since the end 2a, which is the front edge of the The turbulent flow effect of the threads (similar to the fluttering of a flag), together with the wide spread, disrupts the balance of said forces and reduces the probability of stagnation of the textile debris.

FIG. 4 shows another embodiment in which the end portion 3a of the fin 3 is folded back into an arc shape to form a streamlined air suction side, and the air flow in this case is the same as above. be.

0012

[Effects of the Invention] As described above, the heat exchanger of the present invention has a fin shape in which streamlined protrusions with a small friction coefficient are arranged at the ends of the fins to induce a turbulent flow effect in the airflow threads. Therefore, the probability of stagnation of fibers is reduced, the amount of so-called dust and dirt accumulated is reduced, and the heat exchange capacity is made difficult to deteriorate without reducing the air flow rate. This reduces the possibility of clogging of the heat exchanger due to dust and dirt, and is especially suitable for a heat exchanger without a filter where the fins are made of aluminum and the tubes are made of copper.

[Brief explanation of drawings]

FIG. 1 is a plan view of a main part of a fin of a heat exchanger showing an embodiment of the present invention.

FIG. 2 is a perspective view of the fin.

FIG. 3 is an explanatory diagram of air flow relative to the fins.

FIG. 4 is a sectional view of a fin showing another embodiment.

FIG. 5 is a perspective view of a conventional heat exchanger.

FIG. 6 is a side view of the same.

FIG. 7 is an explanatory diagram of airflow to the same fin.

[Explanation of symbols]

1 Heat exchanger 2 Fin 2a End ３　　　　Fin 3a End 6 Streamlined protrusion

Claims (1)

[Claims] [Claim 1] A fin comprising a number of fins arranged in parallel at regular intervals and through which air flows, and a heat medium tube inserted through the fins, the windward end of the fin being formed to have a streamlined cross-section. Features of heat exchanger.