Finned tube heat exchanger capable of enhancing heat exchange and inhibiting frosting

Abstract

The invention provides a finned tube heat exchanger capable of enhancing heat exchange and inhibiting frosting, which comprises a finned tube heat exchanger capable of enhancing heat exchange and inhibiting frosting by changing the structure of an evaporator, and the finned tube heat exchanger has six mounting structures including a structure I, a structure II, a structure III, a structure IV, a structure V and a structure VI, the first structure comprises a first finned tube set, a first axial flow fan and a first wind shield, and compared with the prior art, the finned tube heat exchanger capable of enhancing heat exchange and inhibiting frosting has the following beneficial effects that the specially-designed fin structure can be better matched with a wind field, the heat transfer efficiency is improved, and the heat exchange efficiency is improved; and secondly, due to the special structural design, the frosting phenomenon can be effectively restrained, it is ensured that the stable performance is still kept in the low-temperature environment, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention discloses a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost, and relates to the field of air-conditioning heat pumps. Background Art

[0002] Air source heat pump is an efficient, safe, energy-saving and environmentally friendly heating device with a wide range of applications. However, during winter heating, the low temperature environment causes the outdoor unit fins to frost easily. The frost layer not only hinders air circulation, but also significantly reduces the heat exchange efficiency. This phenomenon will lead to a decrease in the system's heating capacity and a decrease in the coefficient of heating (COP), ultimately affecting indoor comfort. Therefore, it is necessary to take measures to slow down the frost formation speed of the fins and improve the heat exchange efficiency. Therefore, there is an urgent need for fin-tube heat exchangers that can enhance heat exchange and inhibit frost formation to solve the above problems. Summary of the invention

[0003] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost, a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost, including a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost by changing the evaporator structure, characterized in that: the fin-tube heat exchanger has six installation structures, including structure one, structure two, structure three, structure four, structure five and structure six, the structure one includes a first fin-tube group, a first axial flow fan and a first wind shield, the space between the outside of the first fin-tube group and the first axial flow fan is closed by the first wind shield to ensure that the air can only flow through the gap of the first fin-tube group when the first axial flow fan is running, and the fins of the first fin-tube group are designed for non-uniform enhanced heat exchange.

[0004] As a preferred embodiment, the structure 2 includes a second fin tube, a second fan and a second wind shield, the second fin tube is located at the inlet of the second fan, the second fin tube is divided into 4 groups, the 4 groups of second fin tubes form a W shape, the second fan is located above the W-shaped symmetry axis, and the space between the outside of the second fin tube and the second fan is closed by a second wind shield.

[0005] As a preferred embodiment, the structure three includes a third fin tube group, a third axial flow fan and a third wind shield, the third fin tube group is divided into three groups, namely, a third fin tube one, a third fin tube two and a third fin tube three, the third fin tube includes a third heat exchange tube and a third fin group, the third fin is cross-connected with the third heat exchange tube, and the third heat exchange tube of the third fin tube two is symmetrically bent at both ends by 15 to 45 degrees;

[0006] The third fin tube one and the third fin tube three are arranged symmetrically with respect to the center of the third fin tube two, the angle between the plane where the third fin tube one and the third fin tube three are located and the plane of the third fin tube two is 15-45°, the fin direction of the third fin tube one and the third fin tube three is perpendicular to the direction of the third fin group of the third fin tube two, the three groups of third fin tube groups form a bucket-shaped structure, the third axial flow fan is arranged on the central symmetry axis of the bucket-shaped structure, the third axial flow fan blows air through the third fin tube group, the space outside the three groups of fin tubes is closed by the third wind shield plate to ensure that the air can only flow through the gap of the third fin group when the third axial flow fan is in operation, the length direction of the third fin group is approximately 45° with the horizontal ground, the three groups of third fin tube groups are distributed in an X shape, and the rotating axis of the third axial flow fan is placed horizontally.

[0007] As a preferred embodiment, the third heat exchange tubes of the third fin tube one and the third fin tube three are arranged in a trapezoidal shape, and the windward surfaces of the three groups of third fin tube groups are all trapezoidal structures. The third heat exchange tubes of the third fin tube two are arranged in parallel on the bottom surface, and the third heat exchange tubes at both ends are trapezoidal, and the windward surfaces of the third fin tube groups at both ends are trapezoidal. The fin lengths of the third fin tube one and the third fin tube three gradually increase from the bottom surface to the top surface, the fin lengths of the third fin tube two are equal in length on the bottom surface, and the lengths of the third fin groups at both ends gradually increase from the bottom surface to the top surface.

[0008] As a preferred embodiment, the structure four includes a fourth fin tube group, a fourth axial flow fan and a fourth wind shield, the fourth fin tube group is divided into two groups, namely the fourth fin tube one and the fourth fin tube two, the fourth fin tube includes a fourth heat exchange tube and a fourth fin group, the fourth fin is cross-connected with the fourth heat exchange tube, the fourth heat exchange tubes of the fourth fin tube one and the fourth fin tube two are both symmetrically bent at both ends by 15 to 45 degrees, the two groups of the fourth heat exchange tubes are stacked vertically with each other, and the fin direction of the fourth fin tube one is The two groups of fourth fin tubes are perpendicular to the fin direction of the fourth fin tube 2, and form a bucket-shaped structure. The fourth axial flow fan is arranged on the central symmetry axis of the bucket-shaped structure. The fourth axial flow fan blows air through the fourth fin tube group. The space outside the fourth fin tube is closed by a fourth windshield plate to ensure that the air can only flow through the gap of the fourth fin group when the fourth axial flow fan is running. The length direction of the fourth fin is approximately 45° with the horizontal ground. The two groups of fourth fin tubes are X-shaped, and the rotating axis of the fourth axial flow fan is placed horizontally.

[0009] The fourth heat exchange tubes of the fourth fin tube 1 and the fourth fin tube 2 are arranged in parallel on the bottom surface, the fourth heat exchange tubes at both ends are trapezoidal structures, and the windward surfaces of the fourth fin tube groups at both ends are trapezoidal structures. The lengths of the fourth fin groups of the fourth fin tube 1 and the fourth fin tube 2 are equal on the bottom surface, and the lengths of the fins at both ends gradually increase from the bottom surface to the top end.

[0010] As a preferred embodiment, the structure five includes a fifth fin tube group, a fifth axial flow fan and a fifth wind shield, the fifth fin tube group is divided into two groups, namely the fifth fin tube one and the fifth fin tube two, the fifth fin tube includes a fifth heat exchange tube and a fifth fin group, the fifth fin crosses the fifth heat exchange tube and is horizontally oriented with the heat exchanger, the fifth heat exchange tubes of the fifth fin tube one and the fifth fin tube two are placed in parallel, and the fifth fin tube one and the fifth fin tube two are arranged symmetrically with respect to the center;

[0011] The two groups of fifth fin tube groups are symmetrically formed into a V shape, and the fifth axial flow fan is on the central axis of the V-shaped structure. The fifth fin groups of the fifth fin tube one and the fifth fin tube two are tilted to one side at an angle θ, and the rotation direction of the fifth axial flow fan is the same as the tilt direction of the fins of the fifth fin tube group, ensuring that the vortex wind blown out by the fifth axial flow fan enters the fifth fin tube group tangentially, and the space outside the fifth fin tube is closed by the fifth wind shield plate, ensuring that the air can only flow through the gap of the fifth fin group when the fifth axial flow fan is running. The fifth fin tube group is divided into 4 groups, and the 4 groups of fifth fin tube groups constitute a W-shaped structure.

[0012] As a preferred embodiment, the structure six includes a sixth fin tube group, a sixth axial flow fan and a sixth wind shield, the sixth fin tube group includes a sixth heat exchange tube and a sixth fin group, the sixth fin group crosses the sixth heat exchange tube, the sixth heat exchange tubes of the sixth fin tube group are placed in parallel, the sixth fin group of the sixth fin tube is divided into three parts: upper, middle and lower, the sixth fin group of the upper part is inclined to one side at an angle of θ, the fins of the middle part are perpendicular to the sixth heat exchange tube, and the sixth fin group of the lower part is inclined to the other side at an angle of θ, and the sixth axial flow fan is at the upper end of the central axis of the sixth fin tube;

[0013] The rotation direction of the sixth axial flow fan is the same as the inclination direction of the sixth fin group above and below the sixth fin, ensuring that the vortex wind blown out by the sixth axial flow fan enters the sixth fin tube group tangentially, and the space outside the sixth fin tube is closed by the sixth wind shield plate, ensuring that the air can only flow through the gap of the sixth fin group when the sixth axial flow fan is running. The inclined sixth fin group can be replaced by a structure in which the windward surface is bent while the other parts are still perpendicular to the heat exchanger. The bending direction and angle are close to the inclination direction and angle, so as to achieve an effect similar to that of inclined fins.

[0014] The fin-tube heat exchanger provided by the present invention can enhance heat exchange and inhibit frosting. Its specially designed fin structure can increase the heat exchange area and improve the heat transfer efficiency, thereby achieving a higher heat exchange capacity at the same flow rate. Secondly, this special structural design can effectively inhibit frosting, ensure stable performance in low temperature environments, and reduce maintenance costs. At the same time, its compact structural design enables it to be flexibly used in occasions with limited space, improves the overall thermal energy utilization efficiency of the system, and is suitable for a variety of fields such as air conditioning, refrigeration and heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the front view of the inner side of structure 1 in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0017] Figure 2 It is a front view schematic diagram of a second fin tube with a W-structure in a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the third heat exchanger in the third structure of the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0019] Figure 4 It is a schematic diagram of the X-shaped installation structure of the third fin tube 1, the third fin tube 2 and the third fin tube 3 in the structure 3 of the fin tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0020] Figure 5 It is a schematic structural diagram of three groups of trapezoidal fin heat exchange tubes in a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of a four-bucket heat exchanger in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0022] Figure 7 It is a schematic diagram of an X-shaped installation structure of two groups of fin tubes in a structure 4 of a fin tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0023] Figure 8 It is a schematic structural diagram of two groups of trapezoidal fin heat exchange tubes in a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0024] Fig. 9 It is a schematic diagram of the inner V-shaped three-dimensional structure of structure 5 in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0025] Fig.10 It is a schematic diagram of a top view of the structure of the V-shaped fifth fin tube group of structure five in the fin tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0026] Fig.11 It is a schematic diagram of the three-dimensional structure of the fifth fin group of the W structure in the fin-tube heat exchanger of the present invention which can enhance heat exchange and inhibit frosting;

[0027] Fig.12 It is a front view structural schematic diagram of the fifth W-shaped fin group in structure five of the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0028] Fig.13 It is a three-dimensional structural schematic diagram of structure six in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting of the present invention;

[0029] Fig.14 A schematic diagram of a top view of the sixth fin group in structure six of a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0030] Fig.15 A schematic front view of the sixth fin group of the inclined structure of structure six in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0031] Fig.16 A schematic diagram of the three-dimensional structure of a curved fin heat exchanger of structure six in the fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting according to the present invention;

[0032] Fig.17 A top view of the sixth fin group of the six inner bending structures in the fin-tube heat exchanger of the present invention capable of enhancing heat exchange and inhibiting frosting;

[0033] In the figure: 1-Structure 1, 2-Structure 2, 3-Structure 3, 4-Structure 4, 5-Structure 5, 6-Structure 6;

[0034] 101-first fin tube group, 102-first axial flow fan, 103-first wind shield;

[0035] 201 - second fin tube, 202 - second fan, 203 - second wind shield;

[0036] 301-third fin tube group, 302-third axial flow fan, 303-third wind shield;

[0037] 3a-third fin tube one, 3b-third fin tube two, 3c-third fin tube three;

[0038] 3a1-third heat exchange tube, 3a2-third fin group;

[0039] 401- fourth fin tube group, 402- fourth axial flow fan, 403- fourth wind shield;

[0040] 4a-fourth fin tube 1, 4b-fourth fin tube 2;

[0041] 4a1-fourth heat exchange tube, 4a2-fourth fin group;

[0042] 501-fifth fin tube group, 502-fifth axial flow fan, 503-fifth wind shield;

[0043] 5a-fifth fin tube 1, 5b-fifth fin tube 2;

[0044] 5a1-fifth heat exchange tube, 5a2-fifth fin group;

[0045] 601-sixth fin tube group, 602-sixth axial flow fan, 603-sixth wind shield;

[0046] 6a1-sixth heat exchange tube, 6a2-sixth fin group. DETAILED DESCRIPTION

[0047] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0048] See also Figures 1 to 17 , a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting, including a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting by changing the structure of an evaporator. The fin-tube heat exchanger has six installation structures, including structure 1, structure 2, structure 3, structure 4, structure 5, and structure 6. Structure 1 includes a first fin-tube group 101, a first axial flow fan 102, and a first wind shield 103. The space between the outside of the first fin-tube group 101 and the first axial flow fan 102 is closed by the first wind shield 103 to ensure that air can only flow through the gap of the first fin-tube group 101 when the first axial flow fan 102 is running. The fins of the first fin-tube group 101 are designed for non-uniform enhanced heat exchange.

[0049] See also Figure 1As the first embodiment of the present invention, since the fins of the first fin tube group 101 adopt a non-uniform enhanced heat exchange design, the heat exchange effect of the fins in the area close to the first axial flow fan 102 is stronger than that far away from the first axial flow fan 102 due to the higher air flow velocity, this area does not need to enhance the heat exchange or only needs a small amount of enhanced heat exchange; the air flow velocity of the first fin tube group 101 far away from the first axial flow fan 102 becomes smaller, and the heat exchange is relatively weak. The first fin tube group 101 here is not fully utilized, so a greater degree of enhanced heat exchange design is required. Compared with conventional uniform enhanced fins, this gradient enhanced heat exchange fin is more obviously enhanced in places where the wind speed is lower and the heat exchange is weaker, and can well balance the heat exchange effect and resistance, so that the overall heat exchange is significantly improved, but the wind resistance does not change much; while the conventional uniform enhanced fin, while enhancing the heat exchange, the wind resistance is also significantly increased, which is not conducive to application. This embodiment uses gradient enhanced heat exchange fins to increase the surface temperature of the weak heat exchange position and the evaporation temperature of the system, which helps to delay frosting.

[0050] Structure 2 includes a second fin tube 201, a second fan 202 and a second wind shield 203. The second fin tube 201 is located at the inlet of the second fan 202. The second fin tube 201 is divided into 4 groups. The 4 groups of second fin tubes 201 form a W shape. The second fan 202 is located above the W-shaped symmetry axis. The space between the outside of the second fin tube 201 and the second fan 202 is closed by the second wind shield 203.

[0051] See also Figure 2 As the second embodiment of the present invention, since the space between the outside of the second fin tube group 201 and the second fan 202 is closed by the second wind shield 203, it is ensured that when the second fan 202 is running, the air can only flow through the fin gap. This structure has the effect of enhancing heat exchange and inhibiting frosting. Specifically, compared with the traditional V-shaped structure, the second fin tube group 201 is very close to the second fan 202 as a whole, the wind speed is relatively high, and the four groups of second fin tube groups 201 can efficiently exchange heat, while the lower part of the traditional V-shaped structure is far away from the second fan 202, the wind speed is relatively low, and the heat exchange is poor. The W-shaped fin structure of this embodiment can more efficiently utilize the heat exchange area, enhance the overall heat exchange effect, increase the surface temperature of the heat exchanger, and delay frosting.

[0052] The structure three 3 includes a third fin tube group 301, a third axial flow fan 302 and a third wind shield 303. The third fin tube group 301 is divided into three groups, namely, a third fin tube one 3a, a third fin tube two 3b and a third fin tube three 3c. The third fin tube includes a third heat exchange tube 3a1 and a third fin group 3a2. The third fin is cross-connected with the third heat exchange tube 3a1. The third heat exchange tube 3a1 of the third fin tube two 3b is symmetrically bent at both ends by 15 to 45 degrees.

[0053] The third fin tube 1 3a and the third fin tube 3c are arranged symmetrically with respect to the center of the third fin tube 2 3b, the angle between the plane where the third fin tube 1 3a and the third fin tube 3c are located and the plane of the third fin tube 2 3b is 15-45°, the fin direction of the third fin tube 1 3a and the third fin tube 3c is perpendicular to the direction of the third fin group 3a2 of the third fin tube 2 3b, the three groups of third fin tube groups 301 form a bucket-shaped structure, the third axial flow fan 302 is arranged on the central symmetry axis of the bucket-shaped structure, the third axial flow fan 302 blows air through the third fin tube group 301, the space outside the three groups of fin tubes is closed by the third wind shield plate 303, ensuring that the air can only flow through the gap of the third fin group 3a2 when the third axial flow fan 302 is in operation, the length direction of the third fin group 3a2 is approximately 45° with the horizontal ground, the three groups of third fin tube groups 301 are distributed in an X shape, and the rotating axis of the third axial flow fan 302 is placed horizontally.

[0054] The third heat exchange tubes 3a1 of the third fin tube 1 3a and the third fin tube 3 3c are arranged in a trapezoidal shape, and the windward surfaces of the three groups of third fin tube groups 301 are all trapezoidal structures. The third heat exchange tubes 3a1 of the third fin tube 2 3b are arranged in parallel on the bottom surface, and the third heat exchange tubes 3a1 at both ends are trapezoidal, and the windward surfaces of the third fin tube groups 301 at both ends are trapezoidal. The fin lengths of the third fin tube 1 3a and the third fin tube 3 3c gradually increase from the bottom surface to the top surface, the fin lengths of the third fin tube 2 3b are equal in length on the bottom surface, and the lengths of the third fin groups 3a2 at both ends gradually increase from the bottom surface to the top surface.

[0055] See also Figures 3 to 5 As the third embodiment of the present invention: since the three groups of third fin tube groups 301 form a bucket-shaped structure, the third axial flow fan 302 is arranged on the central symmetry axis of the bucket-shaped structure. This bucket-shaped fin tube heat exchanger shows innovation in structural design, especially in suppressing frosting and enhancing heat exchange. The main feature of this bucket-shaped fin tube heat exchanger is its unique fin gap layout, which can be well matched with the vortex wind blown out by the third axial flow fan 302, so that the vortex wind can smoothly flow through each third fin tube group 301, thereby reducing air flow resistance. On the one hand, the vortex wind can enhance heat exchange, and on the other hand, its strong disturbance and shear force can make some frost crystals fall off. Both aspects can play a role in suppressing frosting. The X-shaped fin tube placement angle helps the defrost water to have a sufficient length to flow downward along the fins and accumulate enough weight to overcome the surface tension of the defrost water and discharge it smoothly.

[0056] The structure 44 includes a fourth fin tube group 401, a fourth axial flow fan 402 and a fourth wind shield 403. The fourth fin tube group 401 is divided into two groups, namely the fourth fin tube 1 4a and the fourth fin tube 2 4b. The fourth fin tube includes a fourth heat exchange tube 4a1 and a fourth fin group 4a2. The fourth fin is cross-connected with the fourth heat exchange tube 4a1. The fourth heat exchange tube 4a1 of the fourth fin tube 1 4a and the fourth fin tube 2 4b are both symmetrically bent at both ends by 15 to 45 degrees. The two groups of fourth heat exchange tubes 4a1 are stacked vertically with each other. The fin direction of the fourth fin tube 1 4a is the same as that of the fourth fin tube 4a. The fins of the fourth fin tube 4b are in a vertical direction, and the two groups of fourth fin tube groups 401 form a bucket-shaped structure. The fourth axial flow fan 402 is arranged on the central symmetry axis of the bucket-shaped structure. The fourth axial flow fan 402 blows air through the fourth fin tube group 401. The space outside the fourth fin tube is closed by a fourth windshield 403 to ensure that the air can only flow through the gap of the fourth fin group 4a2 when the fourth axial flow fan 402 is running. The length direction of the fourth fin is approximately 45° with the horizontal ground. The two groups of fourth fin tubes are X-shaped, and the rotation axis of the fourth axial flow fan 402 is placed horizontally.

[0057] The fourth heat exchange tubes 4a1 of the fourth fin tube 1 4a and the fourth fin tube 2 4b are arranged in parallel on the bottom surface, the fourth heat exchange tubes 4a1 at both ends are trapezoidal structures, the windward surfaces of the fourth fin tube groups 401 at both ends are trapezoidal structures, the lengths of the fourth fin groups 4a2 of the fourth fin tube 1 4a and the fourth fin tube 2 4b are equal on the bottom surface, and the lengths of the fins at both ends gradually increase from the bottom surface to the top.

[0058] See also Figures 6 to 8 , as the fourth embodiment of the present invention: based on the explanation in the third embodiment of the present invention, further, the internal structure of its structure four 4 is similar to the internal structure of structure three 3, but compared with structure three 3, structure four 4 reduces the number of fin tube groups, simplifies processing, and reduces costs; in addition, the third fin tube group 301 and the fourth fin tube group 401 overlap at the bottom, which increases the heat exchange area at the bottom, just matching the high wind speed in the center, which is beneficial to improving the heat exchange effect. Since the two groups of fourth fin tube groups 401 form a bucket-shaped structure, the fourth axial flow fan 402 is arranged on the central symmetry axis of the bucket-shaped structure. The bucket-shaped fin-tube heat exchanger is designed through a trapezoidal arrangement. Its main feature is that its space utilization is more reasonable. Specifically, the fin length gradually increases from the bottom to the top, which increases the overall heat exchange area, so that the area of ​​the fourth windshield 403 around the bucket is reduced without affecting the space occupied by the overall structure.

[0059] The structure 5 includes a fifth fin tube group 501, a fifth axial flow fan 502 and a fifth wind shield 503. The fifth fin tube group 501 is divided into two groups, namely, a fifth fin tube 1 5a and a fifth fin tube 2 5b. The fifth fin tube includes a fifth heat exchange tube 5a1 and a fifth fin group 5a2. The fifth fin crosses the fifth heat exchange tube 5a1 and is horizontally oriented to the heat exchanger. The fifth heat exchange tube 5a1 of the fifth fin tube 1 5a and the fifth fin tube 2 5b are placed in parallel. The fifth fin tube 1 5a and the fifth fin tube 2 5b are arranged symmetrically with respect to the center.

[0060] The two groups of fifth fin tube groups 501 are symmetrically formed into a V shape, and the fifth axial flow fan 502 is on the central axis of the V-shaped structure. The fifth fin group 5a2 of the fifth fin tube 1 5a and the fifth fin tube 2 5b is tilted to one side at an angle θ, and the rotation direction of the fifth axial flow fan 502 is the same as the tilt direction of the fins of the fifth fin tube group 501, ensuring that the vortex wind blown out by the fifth axial flow fan 502 enters the fifth fin tube group 501 tangentially, and the space outside the fifth fin tube is closed by the fifth wind shield plate 503, ensuring that the air can only flow through the gap of the fifth fin group 5a2 when the fifth axial flow fan 502 is running. The fifth fin tube group 501 is divided into 4 groups, and the 4 groups of fifth fin tube groups 501 constitute a W-shaped structure.

[0061] See also Figures 9 to 12 As the fifth embodiment of the present invention: since the space outside the fifth fin tube is closed by the fifth windshield 503, it is ensured that when the fifth axial flow fan 502 is running, the air can only flow through the gap of the fifth fin group 5a2. This V-shaped fin-tube heat exchanger has significant advantages in strengthening heat exchange and reducing wind resistance through a unique structural design. Specifically, the fifth fin group 5a2 of the fifth fin tube 1 5a and the fifth fin tube 2 5b is tilted to one side at an angle of θ, and the rotation direction of the fifth axial flow fan 502 is consistent with the tilt direction of the fifth fin group 5a2 of the fifth fin tube group 501. This design ensures that the fifth axial flow fan 502 generates The vortex wind can smoothly enter the fifth fin tube group 501 in a tangential direction, which greatly reduces the resistance encountered by the vortex wind during the flow. Through this structure, the flow of the vortex wind is effectively guided, so that it produces strong disturbance and shear force in the gap of the fifth fin group 5a2. On the one hand, it can enhance the heat exchange, and on the other hand, its strong disturbance and shear force can make some frost crystals fall off, both of which can play a role in inhibiting frosting. At the same time, since the fifth fin tube group 501 is divided into 4 groups, the 4 groups of fifth fin tube groups 501 constitute a W-shaped structure. This W-shaped structure overcomes the problem of low wind speed and poor heat exchange in the V-shaped structure far away from the fan.

[0062] The structure six 6 includes a sixth fin tube group 601, a sixth axial flow fan 602 and a sixth wind shield 603. The sixth fin tube group 601 includes a sixth heat exchange tube 6a1 and a sixth fin group 6a2. The sixth fin group 6a2 crosses the sixth heat exchange tube 6a1. The sixth heat exchange tube 6a1 of the sixth fin tube group 601 is placed in parallel. The sixth fin group 6a2 of the sixth fin tube is divided into three parts: upper, middle and lower. The sixth fin group 6a2 of the upper part is inclined to one side at an angle of θ, the fins of the middle part are perpendicular to the sixth heat exchange tube 6a1, and the sixth fin group 6a2 of the lower part is inclined to the other side at an angle of θ. The sixth axial flow fan 602 is at the upper end of the central axis of the sixth fin tube group 601.

[0063] The rotation direction of the sixth axial flow fan 602 is the same as the inclination direction of the sixth upper and lower sixth fin groups 6a2 of the sixth fins, ensuring that the vortex wind blown out by the sixth axial flow fan 602 enters the sixth fin tube group 601 tangentially.

[0064] See also Figures 13 to 17 , as the sixth embodiment of the present invention: since the space outside the sixth fin tube is closed by the sixth wind shield 603, it is ensured that when the sixth axial flow fan 602 is in operation, the air can only flow through the gap of the sixth fin group 6a2. This layered design allows the vortex wind to flow more smoothly when passing through the sixth fin tube group 601, significantly reducing the resistance of the vortex wind. Specifically, the wind characteristics generated by the vortex wind in the area close to the edge and the middle area are different. The opposite angle inclination design of the upper and lower sixth fin groups 6a2 matches the edge of the vortex wind blown out by the sixth axial flow fan 602, effectively guiding the flow of the vortex wind so that it can quickly and smoothly enter the fin tube, showing The resistance of the edge area of ​​the vortex wind is reduced. The sixth fin group 6a2 in the middle part is perpendicular to the sixth heat exchange tube 6a1. The vortex wind blown out by the sixth axial flow fan 602 is tangent to the gap of the sixth fin group 6a2 when passing through the middle position, thereby reducing the resistance. Therefore, the direction of the sixth fin group 6a2 in the three parts is exactly matched with the vortex wind. On the one hand, the wind resistance is reduced. On the other hand, the vortex wind can enhance heat exchange and increase the surface temperature of the structure six 6 heat exchanger, thereby delaying frosting. The inclined sixth fin group 6a2 can be replaced by a structure in which the windward surface is bent while the other parts are still perpendicular to the heat exchanger. The bending direction and angle are close to the tilting direction and angle, so as to achieve an effect similar to that of the inclined fins.

[0065] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting, including a fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frosting by changing the structure of an evaporator, characterized in that: The fin tube heat exchanger has six installation structures, including structure one (1), structure two (2), structure three (3), structure four (4), structure five (5) and structure six (6). The six structures are all composed of fin tubes, axial flow fans and wind shields. The fin tube structures of structures one (1) and two (1) are designed according to the unevenness of the axial flow fan's air intake, and the fin tube structures of structures three (3), structure four (4), structure five (5) and structure six (6) are designed according to the unevenness of the axial flow fan's air blowing.

2. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure one (1) comprises a first fin tube group (101), a first axial flow fan (102) and a first wind shield (103); the space outside the first fin tube group (101) and between the first axial flow fan (102) is closed by the first wind shield (103) to ensure that air can only flow through the gap of the first fin tube group (101) when the first axial flow fan (102) is in operation; the fins of the first fin tube group (101) are designed with non-uniform enhanced heat exchange.

3. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure two (2) comprises a second fin tube (201), a second fan (202) and a second wind shield (203); the second fin tube (201) is located at the inlet of the second fan (202); the second fin tube (201) is divided into four groups, the four groups of second fin tubes (201) form a W shape; the second fan (202) is located above the symmetry axis of the W shape; the space between the outside of the second fin tube (201) and the second fan (202) is closed by the second wind shield (203).

4. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure three (3) comprises a third fin tube group (301), a third axial flow fan (302) and a third wind shield (303); the third fin tube group (301) is divided into three groups, namely a third fin tube one (3a), a third fin tube two (3b) and a third fin tube three (3c); the third fin tube comprises a third heat exchange tube (3a1) and a third fin group (3a2); the third fin is cross-connected with the third heat exchange tube (3a1); the third heat exchange tube (3a1) of the third fin tube two (3b) is symmetrically bent at both ends by 15 to 45 degrees; the third fin tube one (3a) and the third fin tube three (3c) are symmetrically arranged relative to the center of the third fin tube two (3b); the planes where the third fin tube one (3a) and the third fin tube three (3c) are located are sandwiched between the planes of the third fin tube two (3b) and the third fin tube three (3c). The angle is 15 to 45 degrees, the fin direction of the third fin tube one (3a) and the third fin tube three (3c) is perpendicular to the direction of the third fin group (3a2) of the third fin tube two (3b), the three groups of third fin tube groups (301) form a bucket-shaped structure, the third axial flow fan (302) is arranged on the central symmetry axis of the bucket-shaped structure, the third axial flow fan (302) blows air through the third fin tube group (301), the space outside the three groups of fin tubes is closed by a third windshield (303) to ensure that the air can only flow through the gap of the third fin group (3a2) when the third axial flow fan (302) is in operation, the length direction of the third fin group (3a2) is approximately 45 degrees to the horizontal ground, the three groups of third fin tube groups (301) are distributed in an X shape, and the rotation axis of the third axial flow fan (302) is placed horizontally.

5. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 4, characterized in that: The third heat exchange tubes (3a1) of the third fin tube one (3a) and the third fin tube three (3c) are arranged in a trapezoidal shape, and the windward surfaces of the three groups of third fin tube groups (301) are all trapezoidal structures. The third heat exchange tubes (3a1) of the third fin tube two (3b) are arranged in parallel on the bottom surface, and the third heat exchange tubes (3a1) at both ends are trapezoidal, and the windward surfaces of the third fin tube groups (301) at both ends are trapezoidal. The fin lengths of the third fin tube one (3a) and the third fin tube three (3c) gradually increase from the bottom surface to the top surface, and the fin lengths of the third fin tube two (3b) are equal on the bottom surface, and the lengths of the third fin groups (3a2) at both ends gradually increase from the bottom surface to the top surface.

6. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure four (4) comprises a fourth fin tube group (401), a fourth axial flow fan (402) and a fourth wind shield (403); the fourth fin tube group (401) is divided into two groups, namely a fourth fin tube one (4a) and a fourth fin tube two (4b); the fourth fin tube comprises a fourth heat exchange tube (4a1) and a fourth fin group (4a2); the fourth fin is cross-connected with the fourth heat exchange tube (4a1); both ends of the fourth heat exchange tube (4a1) of the fourth fin tube one (4a) and the fourth fin tube two (4b) are symmetrically bent at 15 to 45 degrees; the two groups of the fourth heat exchange tube (4a1) are stacked vertically with each other; the fourth fin tube one (4a2) is cross-connected with the fourth heat exchange tube (4a1); The fin direction of the fourth fin tube (4a) is perpendicular to the fin direction of the fourth fin tube (4b), the two groups of fourth fin tube groups (401) form a bucket-shaped structure, the fourth axial flow fan (402) is arranged on the central symmetry axis of the bucket-shaped structure, the fourth axial flow fan (402) blows air through the fourth fin tube group (401), the space outside the fourth fin tube is closed by a fourth wind shield (403), ensuring that when the fourth axial flow fan (402) is in operation, the air can only flow through the gap of the fourth fin group (4a2), the length direction of the fourth fin is approximately 45° to the horizontal ground, the two groups of fourth fin tubes are X-shaped, and the rotation axis of the fourth axial flow fan (402) is placed horizontally.

7. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 6, characterized in that: The fourth heat exchange tubes (4a1) of the fourth fin tube one (4a) and the fourth fin tube two (4b) are arranged in parallel on the bottom surface, the fourth heat exchange tubes (4a1) at both ends are in a trapezoidal structure, the windward surfaces of the fourth fin tube groups (401) at both ends are in a trapezoidal structure, the fourth fin groups (4a2) of the fourth fin tube one (4a) and the fourth fin tube two (4b) are of equal length on the bottom surface, and the length of the fins at both ends gradually increases from the bottom surface to the top end.

8. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure five (5) comprises a fifth fin tube group (501), a fifth axial flow fan (502) and a fifth wind shield (503); the fifth fin tube group (501) is divided into two groups, namely the fifth fin tube one (5a) and the fifth fin tube two (5b); the fifth fin tube comprises a fifth heat exchange tube (5a1) and a fifth fin group (5a2); the fifth fin crosses the fifth heat exchange tube (5a1) and is oriented horizontally with the heat exchanger; the fifth heat exchange tubes (5a1) of the fifth fin tube one (5a) and the fifth fin tube two (5b) are placed in parallel; the fifth fin tube one (5a) and the fifth fin tube two (5b) are arranged symmetrically with respect to the center.

9. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 8, characterized in that: The two groups of fifth fin tube groups (501) are symmetrically formed into a V shape, the fifth axial flow fan (502) is on the central axis of the V-shaped structure, the fifth fin group (5a2) of the fifth fin tube one (5a) and the fifth fin tube two (5b) is tilted to one side at an angle of θ, the rotation direction of the fifth axial flow fan (502) is the same as the tilt direction of the fins of the fifth fin tube group (501), ensuring that the vortex wind blown out by the fifth axial flow fan (502) enters the fifth fin tube group (501) tangentially, the space outside the fifth fin tube is closed by a fifth wind shield (503), ensuring that the air can only flow through the gap of the fifth fin group (5a2) when the fifth axial flow fan (502) is in operation, and the fifth fin tube group (501) is divided into four groups, and the four groups of fifth fin tube groups (501) form a W-shaped structure.

10. The fin-tube heat exchanger capable of enhancing heat exchange and inhibiting frost formation according to claim 1, characterized in that: The structure six (6) comprises a sixth fin tube group (601), a sixth axial flow fan (602) and a sixth wind shield (603); the sixth fin tube group (601) comprises a sixth heat exchange tube (6a1) and a sixth fin group (6a2); the sixth fin group (6a2) crosses the sixth heat exchange tube (6a1); the sixth heat exchange tubes (6a1) of the sixth fin tube group (601) are arranged in parallel; the sixth fin group (6a2) of the sixth fin tube is divided into three parts: upper, middle and lower; the sixth fin group (6a2) of the upper part is inclined to one side at an angle of θ; the fins of the middle part are perpendicular to the sixth heat exchange tube (6a1); the sixth fin group (6a2) of the lower part is inclined to the other side at an angle of θ; the sixth axial flow fan (602) is at the upper end of the central axis of the sixth fin tube; The rotation direction of the sixth axial flow fan (602) is the same as the inclination direction of the sixth fin group (6a2) above and below the sixth fin, ensuring that the vortex wind blown out by the sixth axial flow fan (602) enters the sixth fin tube group (601) tangentially. The space outside the sixth fin tube is closed by the sixth wind shield plate (603), ensuring that the air can only flow through the gap of the sixth fin group (6a2) when the sixth axial flow fan (602) is in operation. The inclined sixth fin group (6a2) can be replaced by a structure in which the windward surface is bent while the other parts are still perpendicular to the heat exchanger. The bending direction and angle are close to the inclination direction and angle, so as to achieve an effect similar to that of inclined fins.

Images