Cocurrent flow heat converter special for air conditioner

Abstract

The invention provides a parallel flow heat exchanger special for an air conditioner, comprising a row of parallel heat exchanging flat tubes, wherein, two interfaces of the heat exchanging flat tubes which are arranged parallel. The invention is characterized in that a collecting tube has a shape of an arc, the connecting line of the center point on the transverse section of the arc-shaped collecting tube is a section of arc, the length of the chord line of the arc ranges from zero to 25 times of the height of the arc, the projection of a pair of connecting lines of the center point on the transverse section of the arc-shaped collecting tube has a structure of parallel line when the projection is a straight line. The invention can design the parallel flow heat exchanger completely having the heat exchanging ability under the circumstance of not changing the size of the prior space and apply the heat exchanger to the situation where the prior parallel flow heat exchanger can not be replaced. The parallel flow heat exchanger special for the air conditioner can be designed with a clear aim according to the adopted structure of an air outlet opening of a flow fan of forced air in the process of heat exchange, thereby greatly improving the heat exchanging efficiency. The parallel flow heat exchanger special for the air conditioner also has the characteristics that the heat exchanging ability is great, the radiating aluminium sheet does not need to be sleeved or welded and the shortcomings caused by the radiating aluminium sheet are eliminated.

Description

[0001] The invention relates to a parallel flow heat exchanger specially used for air conditioners, in particular to a parallel flow heat exchanger specially used for air conditioner headers. Background technique [0002] Currently known air conditioner heat exchangers are generally divided into three types according to the tube shape and structure of the heat exchange tubes used, tube-belt type and parallel flow type. The agent is introduced into the pipe made into a certain shape to flow. While flowing, the purpose of heat exchange is achieved by exchanging heat with the air outside the pipe. In order to achieve the required heat exchange capacity, it is necessary to weld the heat dissipation aluminum on the outside of the pipe. Sheet, and equipped with fan forced air convection. Among them, the basic technical characteristics of the parallel flow heat exchanger are: a number of parallel heat exchange flat tubes are vertically connected between a pair of parallel arranged he...

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in the technical structure of the existing parallel flow heat exchanger, which seriously affects its wider application.

The most notable disadvantage is that the headers in the existing parallel flow heat exchangers are all straight cylindrical tubes, that is, the central connection line of the cross section of the headers is a straight line, which determines the parallel flow heat exchange. The shape of the device can only be flat and straight

However, some heat exchanger applications have very limited space, and there are strict restrictions on the expansion of the heat exchanger plane. The planar straight plate parallel flow heat exchanger designed according to these limited space sizes cannot meet the required heat exchange capacity. , only by expanding the application space can it be used in this type of heat exchanger application, but this will increase the production cost and lose the advantages of compact structure and low cost of parallel flow heat exchangers, and in most cases this application is impossible Expanded according to requirements, which limits the alternative use of parallel flow heat exchangers in these special occasions

Furthermore, the air conditioner heat exchanger needs to use fans to force air convection. For some fans, such as cross-flow fans, centrifugal fans, etc., the air inlet and outlet structures are special. The effect of forced air convection is poor, and the purpose of heat exchange cannot be achieved

In the prior art, there is a design of uniformly bending a row of parallel heat exchange flat tubes in the parallel flow heat exchanger, so that the parallel flow heat exchanger can form a curved shape to meet the requirements of specific occasions, but the heat exchange flat tubes The function determines that the shape of its cross-section is a super flat rectangle, and it also determines that it is used in a large number in parallel flow heat exchangers, usually more than dozens of pieces. If it forms a curved shape, it will cause the refrigerant to flow in it. The flow resistance of the cross-flow fan is increased, resulting in an excessive pressure drop during the circulation process, which is difficult in manufacturing technology and high in production costs. Furthermore, cross-flow fans are usually arranged horizontally, that is, the axis of the rotation shaft of the cross-flow fan impeller The line is roughly parallel to the horizontal line. If such a parallel flow heat exchanger is used in the forced convection of the cross-flow fan, the heat exchange flat tube can only be arranged vertically to the axial center line of the impeller shaft of the cross-flow fan. The flow in the heat exchange flat tube needs to go through the process of rising and falling continuously, the pressure drop along the way is greater, and the working condition of the refrigerant changes greatly. These factors will cause the heat exchange capacity to decline, and even fail to reach to the purpose of heat exchange

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