Flow equalizing structure and heat exchanger

Abstract

The flow equalizing structure and the heat exchanger relate to the technical field of heat exchangers, the flow equalizing structure comprises a collecting pipe and a flow equalizing assembly, one end of the collecting pipe is provided with a liquid inlet, the liquid inlet is externally connected with a connecting pipe, the flow equalizing assembly is fixed on the inner wall of an inlet of the liquid inlet, the flow equalizing assembly comprises a baffle plate, a taper hole, a side hole and a lug plate, and taper holes are uniformly formed in the surfaces of the baffle plates. According to the flow equalizing structure and the heat exchanger, the M-shaped structure baffle plate with the notch deviating from the liquid inlet direction is welded and fixed to the inlet of the liquid inlet, so that when the overflowing section of a square flow path space where a refrigerant is transited from the connecting pipe to the interior of the liquid inlet is increased, fluid can be divided into a plurality of parts through the taper holes, and the flow equalizing effect is improved; and the fluid is uniformly guided and diffused to the side wall of the square flow path space of the liquid inlet through the side holes in the two sides of the baffle plate, so that uniform distribution of the fluid is realized, and violent turbulent mixing caused by sudden enlargement of the overflowing cross section of the fluid is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a flow balancing structure and a heat exchanger. Background Art

[0002] The energy efficiency ratio of existing heat pump air conditioning systems in automobiles drops sharply in low-temperature environments, and the heating performance is obviously insufficient. The reason is that the outdoor heat exchanger in the heat pump air conditioning system is used as an evaporator when the system is heating. The surface temperature is very low under working conditions. In low-temperature environments, the surface of the heat exchanger is easily frosted, resulting in a decrease in the heat exchange performance of the heat exchanger itself.

[0003] The above defects are mainly caused by the structural characteristics of the existing heat exchanger itself. When the existing heat exchanger works as an evaporator, the refrigerant entering the heat exchanger is in a gas-liquid two-phase mixed state. Due to the effect of gravity, there is less refrigerant in the upper area of the process and more refrigerant in the lower area, and the distribution is very uneven, resulting in part of the heat exchange area not being fully utilized, so that the performance of the heat exchanger cannot be fully exerted. In addition, when the fluid flows from the circular pipe to the square process space, the fluid flow cross-section suddenly becomes larger, and the flow undergoes violent turbulent mixing. At the same time, due to the sudden change in the shape of the flow cross-section, the fluid is unevenly distributed in its process, which seriously affects the heat exchange efficiency of the heat exchanger.

[0004] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and a flow-balancing structure and heat exchanger are proposed. Utility Model Content

[0005] The purpose of the present invention is to provide a flow balancing structure and a heat exchanger to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flow balancing structure, including a collecting pipe and a flow balancing component, the collecting pipe is provided with a liquid inlet at one end, and the liquid inlet is connected to a connecting pipe, the flow balancing component is fixed to the inner wall of the liquid inlet, the flow balancing component includes a baffle, a conical hole, a side hole and an ear plate, the baffle surface is evenly provided with conical holes, and the side holes are symmetrically provided on both sides of the baffle, and the two ends of the baffle are integrally bent into ear plates.

[0007] Furthermore, the flow cross section increases when the refrigerant passes from the connecting pipe to the square flow space inside the liquid inlet.

[0008] Furthermore, the baffle is an "M"-shaped structure with the notch facing away from the liquid inlet direction, and the side holes on both sides of the baffle face the side walls of the liquid inlet.

[0009] Furthermore, the baffle is fixed by welding to the inner wall of the liquid inlet through ear plates at both ends, and the transverse span of the baffle is larger than the diameter of the pipe opening.

[0010] Furthermore, plugs are fixed at both ends of the collecting pipe, and a diversion port is opened at the bottom of the collecting pipe.

[0011] Furthermore, a partition is radially mounted inside the manifold, and the partition divides the manifold into multiple flows, and the refrigerant is introduced from the liquid inlet and flows through the multiple flows in sequence and is discharged from the liquid outlet at the other end of the manifold.

[0012] Furthermore, a flow-balancing baffle is fixed inside the manifold, and the flow-balancing baffle is inclined in a direction away from the liquid inlet.

[0013] A heat exchanger is installed in a flow-sharing structure and comprises heat exchange tubes. The heat exchange tubes are arranged in parallel on opposite surfaces of two collecting pipes, and fins are fixed on the outer walls of the heat exchange tubes along the extension direction.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When the utility model is in use, an "M"-shaped structure baffle with a notch facing away from the liquid inlet direction is welded and fixed at the entrance of the liquid inlet. When the flow cross-section of the refrigerant from the connecting pipe to the square flow space inside the liquid inlet increases, the fluid can be divided into several parts through the tapered hole, and the fluid is evenly diverted and diffused to the side walls of the square flow space of the liquid inlet through the side holes on both sides of the baffle, thereby achieving uniform distribution of the fluid and avoiding violent turbulent mixing of the flow due to a sudden increase in the fluid flow cross-section.

[0016] 2. When the utility model is in use, the heat exchange tubes are divided into multiple strokes by setting partitions, and a flow-equalizing baffle is set at the position of the collecting pipe corresponding to each stroke. The flow-equalizing baffle is inclined away from the liquid inlet, so that the refrigerant in each stroke flows more evenly into each heat exchange tube, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the header of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the current balancing component of the utility model.

[0020] In the figure: 1. Collecting pipe; 2. Liquid inlet; 3. Connecting pipe; 4. Flow balancing assembly; 401. Baffle; 402. Conical hole; 403. Side hole; 404. Ear plate; 5. Plug; 6. Diversion port; 7. Partition; 8. Flow balancing baffle; 9. Heat exchange tube; 10. Fin. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figures 1 to 3 As shown, a flow balancing structure includes a manifold 1 and a flow balancing component 4. A liquid inlet 2 is provided at one end of the manifold 1, and the liquid inlet 2 is externally connected to a connecting pipe 3. When the refrigerant passes from the connecting pipe 3 to the square flow space inside the liquid inlet 2, the flow cross-section increases. The flow balancing component 4 is fixed to the inner wall of the inlet of the liquid inlet 2. The flow balancing component 4 includes a baffle 401, a tapered hole 402, a side hole 403 and an ear plate 404. The surface of the baffle 401 is evenly provided with tapered holes 402, and the side holes 403 are symmetrically provided on both sides of the baffle 401, and the two ends of the baffle 401 are integrally bent into ear plates 404. The baffle 401 is an "M"-shaped structure with a notch facing away from the liquid inlet direction, and the side holes 403 on both sides of the baffle 401 are facing the side walls of the liquid inlet 2. The baffle 401 is welded and fixed to the inner wall of the inlet of the liquid inlet 2 through the ear plates 404 at both ends, and the horizontal span of the baffle 401 is larger than the diameter of the connecting pipe 3.

[0023] The specific operation is as follows: by welding and fixing an "M"-shaped baffle plate 401 with a notch facing away from the liquid inlet direction at the entrance of the liquid inlet 2, when the flow cross-section of the refrigerant flowing from the pipe 3 to the square flow space inside the liquid inlet 2 increases, the conical hole 402 can divide the fluid into several parts, and the side holes 403 on both sides of the baffle plate 401 evenly guide and diffuse the fluid to the side walls of the square flow space of the liquid inlet 2, thereby achieving uniform distribution of the fluid and avoiding violent turbulent mixing caused by the sudden increase in the flow cross-section of the fluid;

[0024] like Figure 1 As shown, plugs 5 are fixed at both ends of the manifold 1, and a diversion port 6 is opened at the bottom of the manifold 1. A partition 7 is radially mounted inside the manifold 1, and the partition 7 divides the manifold 1 into multiple processes, and the refrigerant is introduced from the liquid inlet 2 and flows through multiple processes in sequence and is discharged from the liquid outlet at the other end of the manifold 1. A flow-equalizing baffle 8 is fixed inside the manifold 1, and the flow-equalizing baffle 8 is inclined away from the liquid inlet 2. A heat exchanger is installed in the flow-equalizing structure, including heat exchange tubes 9, which are arranged in parallel on opposite surfaces of the two manifolds 1, and fins 10 are fixed to the outer walls of the heat exchange tubes 9 along the extension direction;

[0025] The specific operation is as follows: the heat exchange tube 9 is divided into multiple strokes by setting a partition 7, and a flow equalizing baffle 8 is set at the position of the collecting pipe 1 corresponding to each stroke. The flow equalizing baffle 8 is inclined away from the liquid inlet 2, so that the refrigerant in each stroke flows into each heat exchange tube 9 more evenly, thereby improving the heat exchange efficiency.

[0026] Working principle: When using this flow-balancing structure and heat exchanger, an "M"-shaped structure baffle 401 with a notch facing away from the liquid inlet direction is welded and fixed at the entrance of the liquid inlet 2, so that when the flow cross-section of the refrigerant from the connecting pipe 3 to the square flow space inside the liquid inlet 2 increases, the fluid can be divided into several parts through the tapered hole 402, and the fluid is evenly diverted and diffused to the side walls of the square flow space of the liquid inlet 2 through the side holes 403 on both sides of the baffle 401, thereby achieving uniform distribution of the fluid and avoiding violent turbulent mixing of the flow due to a sudden increase in the fluid flow cross-section. In addition, the heat exchange tube 9 is divided into multiple strokes by setting a partition 7, and a flow-balancing baffle 8 is set at the position of the collecting pipe 1 corresponding to each stroke. The flow-balancing baffle 8 is inclined away from the liquid inlet 2, so that the refrigerant in each stroke flows more evenly into each heat exchange tube 9, thereby improving the heat exchange efficiency.

[0027] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A flow balancing structure, comprising a collecting pipe (1) and a flow balancing component (4), characterized in that: The collecting pipe (1) is provided with a liquid inlet (2) at one end, and the liquid inlet (2) is externally connected to a connecting pipe (3). The flow balancing component (4) is fixed to the inner wall of the entrance of the liquid inlet (2). The flow balancing component (4) comprises a baffle (401), a conical hole (402), a side hole (403) and an ear plate (404). The baffle (401) is provided with conical holes (402) evenly on its surface, and the side holes (403) are symmetrically provided on both sides of the baffle (401), and both ends of the baffle (401) are integrally bent to form ear plates (404).

2. A current sharing structure according to claim 1, characterized in that: When the refrigerant passes from the connecting pipe (3) to the square flow space inside the liquid inlet (2), the flow cross section increases.

3. The current sharing structure according to claim 1, characterized in that: The baffle (401) is an "M"-shaped structure with the notch facing away from the liquid inlet direction, and the side holes (403) on both sides of the baffle (401) face the side walls of the liquid inlet (2).

4. The current sharing structure according to claim 1, characterized in that: The baffle (401) is welded and fixed to the inner wall of the inlet of the liquid inlet (2) through the ear plates (404) at both ends, and the transverse span of the baffle (401) is greater than the diameter of the connecting pipe (3).

5. The current sharing structure according to claim 1, characterized in that: Plugs (5) are fixed at both ends of the collecting pipe (1), and a diversion port (6) is provided at the bottom of the collecting pipe (1).

6. The current sharing structure according to claim 1, characterized in that: A partition (7) is radially mounted inside the manifold (1), and the partition (7) divides the manifold (1) into multiple flows, and the refrigerant is introduced from the liquid inlet (2) and sequentially flows through the multiple flows and is discharged from the liquid outlet at the other end of the manifold (1).

7. The current sharing structure according to claim 1, characterized in that: A flow-balancing baffle (8) is fixed inside the collecting pipe (1), and the flow-balancing baffle (8) is inclined in a direction away from the liquid inlet (2).

8. A heat exchanger, installed in the flow balancing structure according to any one of claims 1 to 7, characterized in that: It comprises heat exchange tubes (9), which are arranged in parallel on opposite surfaces of two collecting tubes (1), and fins (10) are fixed on the outer walls of the heat exchange tubes (9) along the extension direction.

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