A multi-segment unequal fin pitch heat exchanger structure and an air conditioner

Abstract

The present invention provides a multi-segment unequal fin pitch heat exchanger structure, which includes a plurality of fin bodies and a plurality of heat exchange tubes inserted into the fin bodies in parallel. The plurality of fin bodies are arranged to form a fin plate, and the fin plate includes a plurality of fin segments. Each fin segment abuts against the adjacent one in turn, so that an included angle is formed between two adjacent fin segments, and thus a plurality of ventilation sides with different angles are formed on the fin plate. By reasonably distributing the plurality of fin segments in the air conditioner, when the air enters, the air source passes through the plurality of ventilation sides with different angles and through the plurality of fin segments, so that the air source is in the same negative pressure area after passing through the plurality of fin segments, further adjusting and balancing the overall air intake speed of the air conditioner, thereby reducing the noise generated during the rotation and cutting of the fan; moreover, the incoming air flow with a nearly same wind speed can also be uniformly cooled and heated by the fin plate, thus balancing the uniformity of the incoming air temperature inside the air conditioner, not only ensuring the overall heat exchange uniformity of the air conditioner, but also reducing the generation of condensation and condensate.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly relates to a multi-section unequal fin pitch heat exchanger structure and an air conditioner thereof. Background Art

[0002] The air inlet uniformity of the heat exchanger is a key factor affecting the heat exchange performance of the indoor unit of the air conditioner. In the air conditioner with a fan system, due to the limitations of the overall structure size, the heat exchanger structure size, and the spatial position of the heat exchanger, the air inlet of the heat exchanger is uneven, resulting in a reduction in the heat exchange performance of the air conditioner.

[0003] For example, the Chinese patent "CN104848515A" discloses "an air conditioner heat exchanger and a wall-mounted air conditioner indoor unit". In this heat exchanger, the refrigerant first flows into the first row, and then is split through a three-way pipe. The refrigerant with a large dryness flows upward into the second row and the third row, and the refrigerant with a small dryness flows along the outer row and the inner row, making the entire heat exchange process more uniform. However, due to the certain difference between the fixed layout of the heat exchanger and the position of the cross-flow fan, when the cross-flow fan is working, each part of the heat exchanger is not in the same negative pressure area, resulting in a large difference in the air intake speed of each part of the heat exchanger. Finally, when the cross-flow fan rotates and cuts the intake airflows at different speeds, noise will be generated, and under the action of different intake airflows, the heat and cold driving performance of the heat exchanger is also inconsistent, resulting in a certain temperature difference in the airflows, affecting the overall heat exchange uniformity of the air conditioner. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a multi-section unequal fin pitch heat exchanger structure and an air conditioner thereof, which solve the problems in the prior art that there is a large difference in the air intake speed of each part of the heat exchanger, resulting in noise generated when the cross-flow fan rotates and cuts the intake airflows at different speeds, and affecting the overall heat exchange uniformity of the air conditioner under the action of different intake airflows.

[0005] On the one hand, according to an embodiment of the present invention, a multi-section unequal fin pitch heat exchanger structure includes a plurality of fin bodies and a plurality of heat exchange tubes inserted parallel into the fin bodies, and the plurality of fin bodies are arranged to form a fin plate. The fin plate includes a plurality of fin segments, and each fin segment abuts against each other in sequence, so that an included angle is formed between two adjacent fin segments, so that the fin plate forms a plurality of ventilation sides with different angles.

[0006] Preferably, each fin segment is fixedly connected in sequence through a screw.

[0007] Preferably, the fin bodies in each fin segment are arranged equidistantly and parallel to each other, so that an air flow channel is formed between two adjacent fin bodies.

[0008] Preferably, the air flow channel is parallel to the thickness direction of the fin segment.

[0009] Preferably, there are three fin segments.

[0010] Preferably, the air flow channel spacing in the fin segments at both ends is 1.40 mm - 1.42 mm.

[0011] Preferably, the air flow channel spacing in the fin segment in the middle is 1.33 mm - 1.35 mm.

[0012] On the other hand, according to an embodiment of the present invention, an air conditioner is further provided, which includes an air conditioner bottom frame main body, an air conditioner middle frame main body, and the heat exchanger structure of the above embodiment. The air conditioner bottom frame main body is connected to the air conditioner middle frame main body to form a cavity. The heat exchanger structure is located in the cavity and divides the cavity into an upper chamber and a lower chamber.

[0013] Preferably, both ends of the heat exchanger structure are clamped or screwed between the air conditioner bottom frame main body and the air conditioner middle frame main body.

[0014] Preferably, the cross-flow fan is located in the lower chamber. When the cross-flow fan operates, the air flow in the upper chamber enters the lower chamber through several ventilation sides.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By dividing the fin plate formed by arranging several fin bodies into several fin segments and reasonably distributing the several fin segments in the air conditioner, when the air inlet, the air source passes through several fin segments through several ventilation sides with different angles, so that the air source is in the same negative pressure area after passing through several fin segments, further adjusting and balancing the overall air intake speed of the air conditioner, thereby reducing the noise generated during the rotation and cutting of the fan; not only that, the incoming air flow approaching the same wind speed can also be uniformly cooled and heat-treated by the fin plate, thereby balancing the uniformity of the incoming air temperature inside the air conditioner, not only ensuring the overall heat exchange uniformity of the air conditioner, but also reducing the temperature difference inside the air conditioner, reducing the generation of condensation and condensate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of using three fin segments in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the air flow rate experiment of a conventional heat exchanger.

[0019] Figure 3 It is a schematic diagram of the air flow rate experiment of the fin segment in an embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of the air flow rate experiment of different splicing forms of the fin segment in an embodiment of the present invention.

[0021] In the above-mentioned accompanying drawings: 1. fin plate; 10. fin segment; 11. fin body; 12. heat exchange tube; 2. air conditioner bottom frame main body; 3. air conditioner middle frame main body; 30. upper chamber; 31. lower chamber; 4. cross-flow fan. Specific Embodiment

[0022] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] An embodiment of the present invention provides a multi-segment unequal fin pitch heat exchanger structure, which includes a plurality of fin bodies 11 and a plurality of heat exchange tubes 12 inserted parallel into the fin bodies 11. The plurality of fin bodies 11 are arranged to form a fin plate 1. The fin plate 1 includes a plurality of fin segments 10. Each fin segment 10 abuts against each other in sequence, so that an included angle is formed between two adjacent fin segments 10, so that the fin plate 1 forms a plurality of ventilation sides with different angles; each fin segment 10 is fixedly connected in sequence through a screw.

[0024] In the conventional air conditioner heat exchanger part, due to the difference in the distance between the fin plate 1 and the fan, the air inlet pressure at each point is inconsistent, and the air inlet speed has a large difference. For example Figure 2 As shown, through data simulation, under the guidance of the fin plate 1 with a fixed structure by the air inlet source, the air flow around the fin plate 1 has a speed difference. The wind speed gradually increases from the back to the front and then gradually decreases (the color changes from light to dark and then from dark to light). The air flows with different speeds cover the whole fan, resulting in the fan cutting the air flows with different speeds during movement, and the air flow with too high a speed will impact the internal structure of the air conditioner, all of which will generate a certain amount of noise.

[0025] In this embodiment, as Figure 1 shown, during the assembly of each air conditioner, fin segments 10 with different lengths (cross-sectional areas) are produced corresponding to different air conditioner models, and each fin segment 10 is fixedly connected in sequence through a screw to form a fin plate 1 corresponding to the air conditioner. Different forms of fin plates 1 are matched with different air conditioners, and a plurality of fin segments 10 (the whole fin plate 1) are reasonably distributed in the air conditioner, the distance between each fin segment 10 and the fan is controlled, and the fin plate 1 forms ventilation sides with different angles. When the air conditioner intakes air, the air source passes through a plurality of ventilation sides with different angles and through a plurality of fin segments 10, so that the air source is in the same negative pressure area after passing through a plurality of fin segments 10, further adjusting and balancing the overall air intake speed of the air conditioner, thereby reducing the noise generated when the fan rotates and cuts.

[0026] Based on the above, the splicing of each fin segment 10 not only changes the angle on the ventilation side and the spacing from the fan. Before reasonably planning several fin segments 10 and installing them into the air conditioner, the lengths of the fin segments 10 are often quite different. Therefore, different lengths of fin segments 10 are used to correspond to different inlet areas, making the speeds in each inlet area more uniform. The averaged inlet air flow can also be uniformly cooled and heated by the fin plate 1, thereby balancing the uniformity of the inlet air temperature inside the air conditioner, not only improving the above-mentioned noise problem, but also ensuring the overall heat exchange uniformity of the air conditioner, reducing the temperature difference inside the air conditioner, reducing the generation of condensation and condensate, and avoiding the problems of overcooling or overheating in different areas caused by different inlet air speeds in the early stage.

[0027] Verify the above scheme through experiments:

[0028] Three fin segments 10 are used. The three fin segments 10 are specified in length according to the applicable air conditioner and installed inside the air conditioner. When adjusting the spacing between each fin segment 10 and the fan, the length of one or / and two of the fin segments 10 can be shortened to increase the angle between the two fin segments 10 (shorten the spacing from the fan) or decrease the angle between the two fin segments 10 (increase the spacing from the fan). After completing the assembly and conducting the experiment, it is found that, as Figure 3 shown, the air flow through each fin segment 10 evenly enters the middle position of the fan. The air flow around the fan is relatively uniform as a whole, and the air flow speed around the fan is relatively average. The colors of the air flow speeds in the figure are relatively close, effectively improving the noise problem and enhancing the user experience.

[0029] Moreover, in this embodiment, the fin bodies 11 in each fin segment 10 are arranged at equal distances and parallel to each other, so as to form an air flow channel between two adjacent fin bodies 11. The air flow channel is parallel to the thickness direction of the fin segment 10, which is convenient for assembling the fin segment 10; while changing the inlet area of each fin segment 10, it is assisted by changing the specific distance between the fin bodies 11 in each fin segment 10. By changing the size of the air flow channel, the amount of air flow passing through each fin segment 10 is changed, thereby changing the inlet area of the fin segment 10.

[0030] In the above experiment, the spacing of the air flow channels in the fin segments 10 at both ends is 1.40 mm - 1.42 mm, preferably 1.40 mm, and the spacing of the air flow channels in the fin segment 10 in the middle is 1.33 mm - 1.35 mm, preferably 1.35 mm.

[0031] At both ends of the fin plate 1 composed of three fin segments 10 with fin channel spacings of 1.40 mm, 1.41 mm, and 1.42 mm, fin segments 10 with spacings of 1.35 mm, 1.36 mm, 1.37 mm, and 1.38 mm are adopted. Since the air inlet section of the middle fin segment 10 is higher than that of the fin segments 10 at both ends, in the combination of the above six data, different degrees of air flow balance can be achieved. However, in multiple rounds of experiments, better effects are obtained when the middle fin segment 10 with a spacing of 1.35 mm and the fin segments 10 at both ends with a spacing of 1.40 mm are used. Through comparison of experimental data, the color at the bottom of the fan is lighter and closer to the overall air flow color of the fan, indicating that the air flow is more even, as Figure 3 shown.

[0032] For another example, the fin plate 1 is spliced by fin segments 10 with different lengths, and three fin segments 10 with the above-mentioned preferred fin channel spacings are used to conduct experiments on another air conditioner, as Figure 4 shown. The rectangular boxes in the figure represent three different fin segments 10. By changing the positions of the three different fin segments 10 in the air conditioner and through the improved fin channel spacing, after the experiment is completed and the experimental figure is observed, the air flow around the fan and the air flow entering the fin segments 10 are relatively even, and the air flow with a faster speed has been discharged from the front end of the fan out of the air conditioner.

[0033] On the other hand, the present invention also proposes an air conditioner, as Figure 1 shown, which includes an air conditioner bottom frame main body 2, an air conditioner middle frame main body 3, and the above heat exchanger structure. The air conditioner bottom frame main body 2 is connected to the air conditioner middle frame main body 3 to form a cavity. The heat exchanger structure is located in the cavity and divides the cavity into an upper chamber 30 and a lower chamber 31.

[0034] Both ends of the heat exchanger structure are clamped or screwed between the air conditioner bottom frame main body 2 and the air conditioner middle frame main body 3.

[0035] It further includes a cross-flow fan 4. The cross-flow fan 4 is located in the lower chamber 31. When the cross-flow fan 4 operates, the air flow in the upper chamber 30 enters the lower chamber 31 through a plurality of ventilation sides.

[0036] The top of the air conditioner middle frame main body 3 is an air inlet net of the air conditioner. Before installing the heat exchanger structure, first install the air conditioner middle frame main body 3 on the air conditioner bottom frame main body 2, and clamp or screw both ends of the heat exchanger structure between the air conditioner bottom frame main body 2 and the air conditioner middle frame main body 3. When the air conditioner operates, that is, when the cross-flow fan 4 operates, the external air flow enters the upper chamber 30 through the air inlet net at the top of the air conditioner middle frame main body 3, then enters the cross-flow fan 4 through ventilation sides at different angles to form an air flow with an average wind speed, and finally is discharged through the lower chamber 31.

[0037] In summary, the present application produces fin segments 10 of different lengths and fin segments 10 with different spacings of the fin body 11 according to different air conditioners, ensuring that the shape of the fin segments 10 remains unchanged, only adjusting the assembly spacing of the fin body 11, and by reasonably arranging the positions of different fin segments 10 in the air conditioner, improving the spacing between each fin segment 10 and the cross-flow fan 4, thereby improving the direction of the air flow after entering the air conditioner and the average wind speed entering the cross-flow fan 4, that is, adjusting and balancing the overall air intake speed of the air conditioner, not only reducing the noise source of the air conditioner, but also effectively balancing the air intake speed and the uniform heat exchange of the heat exchanger structure, and stabilizing the stability and heat exchange effect of the heat exchange system.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A multi - section unequal - pitch fin - spacing heat exchanger structure, comprising a plurality of fin bodies (11) and a plurality of heat exchange tubes (12) inserted parallel to the fin bodies (11), and the plurality of fin bodies (11) are arranged to form a fin plate (1), characterized in that, The fin plate (1) includes a plurality of fin segments (10), and each of the fin segments (10) abuts against each other in sequence, so that an included angle is formed between two adjacent fin segments (10), so that the fin plate (1) forms a plurality of ventilation sides with different angles; The air flow channel spacing in the fin segments (10) at both ends is 1.40 mm - 1.42 mm.

2. The structure of a multi-segment unequal fin pitch heat exchanger according to claim 1, characterized in that, Each of the fin segments (10) is fixedly connected in sequence by screws.

3. A multi-segment unequal fin pitch heat exchanger structure according to claim 1 or 2, characterized in that, Each of the fin bodies (11) in each of the fin segments (10) is arranged equidistantly and parallel to each other, so that an air flow channel is formed between two adjacent fin bodies (11).

4. A multi-stage unequal fin pitch heat exchanger structure according to claim 3, characterized in that, The air flow channel is parallel to the thickness direction of the fin segment (10).

5. A multi-segment unequal fin pitch heat exchanger structure according to claim 1, characterized in that, The number of the fin segments (10) is three.

6. A multi-segment unequal fin pitch heat exchanger structure according to claim 5, characterized in that, The air flow channel spacing in the fin segment (10) in the middle is 1.33 mm - 1.35 mm.

7. An air conditioner, characterized in that, It includes an air conditioner bottom frame body (2), an air conditioner middle frame body (3) and the heat exchanger structure according to any one of claims 1-6. The air conditioner bottom frame body (2) is connected to the air conditioner middle frame body (3) to form a cavity, and the heat exchanger structure is located in the cavity and divides the cavity into an upper chamber (30) and a lower chamber (31).

8. The air conditioner according to claim 7, characterized in that, Both ends of the heat exchanger structure are clamped or screwed between the air conditioner bottom frame body (2) and the air conditioner middle frame body (3).

9. The air conditioner according to claim 7, characterized in that, It further includes a cross-flow fan (4). The cross-flow fan (4) is located in the lower chamber (31). When the cross-flow fan (4) works, the air flow in the upper chamber (30) enters the lower chamber (31) through a plurality of ventilation sides.

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