CN201093911Y - Finned heat exchanger for air conditioner - Google Patents

Abstract

The utility model relates to a fin-type heat exchanger for air conditioners, which belongs to the field of the household appliances. The fin-type heat exchanger of the utility model comprises heat exchanging tubes and fins. A plurality of sets of heat exchanging tubes are respectively embedded in the fins, wherein, the tube cross section of the heat exchanger is oval. Due to the fin-type heat exchanger of the utility model, air can flow among the heat exchanging tubes, and the fin-type heat exchanger of the utility model also can reduce and prevent air flows form flowing around, thereby reducing the energy consumption of the operating of air conditioners and having value to be promoted in the field of household appliances.

Description

Finned heat exchanger for air conditioner

technical field

The utility model relates to a heat exchanger, in particular to a finned heat exchanger for an air conditioner, which belongs to the field of household appliances.

Background technique

For air conditioners that are generally sold in the market at present, the evaporator and condenser adopt a finned heat exchanger composed of round copper tubes and aluminum plate fins, accounting for most of the volume of the entire system. As shown in Figure 1: When the air conditioner starts to operate, when the airflow generated by the fan flows behind the circular tube, a low-speed vortex area will be generated, which will affect the normal flow of the airflow, thereby reducing the heat transfer coefficient; at the same time, from the direction of the gas flow It is considered that due to the shape characteristics of the cross section of the circular tube, it causes greater resistance and forms a certain degree of circumvention, which also affects the normal flow of the air flow and reduces the obtained heat transfer. Therefore, due to the existence of the above defects, the energy consumption during the operation of the air conditioner is increased, which is not conducive to saving the use cost.

Contents of the invention

The purpose of the utility model is to overcome the above problems in the prior art and provide a finned heat exchanger for air conditioning.

The purpose of this utility model is achieved through the following technical solutions:

The finned heat exchanger for air-conditioning includes heat exchange tubes and fins. There are multiple sets of heat exchange tubes embedded in the fins respectively, wherein the cross section of the heat exchange tubes is elliptical.

The purpose of this utility model can also be further realized through the following technical measures:

In the above-mentioned finned heat exchanger for air conditioning, the long axis of the cross-section of the elliptical heat exchange tube body and the long side of the fins are arranged perpendicular to each other.

The utility model has the advantages of: after adopting the utility model, it can ensure the smooth circulation of air between the heat exchange tubes, reduce and avoid the occurrence of the air flow circumvention, increase the heat transfer area and improve the heat transfer coefficient at the same time, from the overall On the one hand, it reduces the energy consumption of the air conditioner, so it is worth popularizing in this field.

The objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a diagram of the air flow near the heat exchange tube with a circular cross section (the arrow represents the direction of the air flow);

Fig. 2 is a schematic cross-sectional view of the utility model.

The meaning of each reference mark in the figure is as follows:

serial number Refers to serial number Refers to 1   Heat Exchange Tube 2 Fins 3 Long axis 4 The long side

Detailed ways

As shown in Figure 2, the heat exchanger with fins 2 for air conditioning includes heat exchange tubes 1 and fins 2. There are multiple sets of heat exchange tubes 1, which are respectively embedded in fins 2. The special feature is that: The cross-section of the heat exchange tube 1 is oval, which changes the understanding of the heat exchange tube 1 in the prior art. Further, the long axis 3 of the cross-section of the elliptical heat exchange tube 1 and the long side 4 of the cross-section of the fin 2 are arranged perpendicular to each other.

In the production process of the fin 2 heat exchanger for air conditioners, a rolling process is added to the round copper tube as the heat exchange tube 1 to shape it into an ellipse without increasing consumables. As a result, the contact area between the airflow in the heat exchanger and the heat exchange tube 1 is increased, the influence of airflow circumvention and resistance is reduced, and the air passes through smoothly.

Further combined with the before and after comparison experiment of the product, it is found that under the same conditions, the heat transfer circumference of the elliptical heat exchange tube 1 is larger than that of the round tube, so the thermal resistance inside the tube is small, which is beneficial to the heat transfer of the medium in the tube. At the same time, its heat transfer area is 15% larger than that of a circular tube with the same cross-sectional area, and the heat transfer outside the tube can be increased by 15% at the same flow rate, and the average condensation heat transfer coefficient outside the oval heat exchange tube 1 is 10% higher than that of the circular tube ~18%.

From the above text, it can be seen that after the utility model is adopted, the smooth circulation of air between the heat exchange tubes 1 can be ensured, the occurrence of circumvention of the air flow can be reduced and avoided, the heat transfer area can be increased, and the heat transfer coefficient can be improved at the same time. , which reduces the energy consumption of the air conditioner as a whole, so it is worth popularizing in this field.

Of course, the above are only specific application examples of the utility model, and do not constitute any limitation to the protection scope of the utility model. In addition to the above-mentioned embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the utility model.

Claims (2)

1. A finned heat exchanger for air conditioning, including heat exchange tubes and fins. There are multiple sets of heat exchange tubes, which are respectively embedded in the fins. It is characterized in that: the cross section of the heat exchange tube is elliptical shape. 2. The finned heat exchanger for air conditioners according to claim 1, characterized in that: the long axis of the cross-section of the elliptical heat exchange tube body and the long side of the fins are arranged perpendicular to each other.

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