Heat exchanger and air conditioner

Abstract

The utility model discloses a heat exchanger and an air conditioner, the heat exchanger comprises a fin, the fin comprises a plurality of fin units, and each fin unit is provided with a pipe hole; the heat exchange tubes are arranged in the tube holes in a penetrating manner; each fin unit comprises a corrugated section, the side, facing the thickness direction of the corresponding fin unit, of each corrugated section protrudes, each corrugated section comprises a first slope section and a second slope section which are sequentially connected, each first slope section is obliquely arranged relative to the corresponding second slope section, each first slope section is provided with a first slotted structure, and each first slotted structure forms a first channel; the second slope section is provided with a second slotted structure, and a second channel is formed in the second slotted structure; in the airflow direction, one of the first channel and the second channel is configured to be a gradually-shrinking channel with a gradually-decreasing width, and the other one is configured to be a gradually-expanding channel with a gradually-increasing width. Therefore, by arranging the heat exchanger, the heat exchange area of the fin units can be increased, multiple disturbances can be generated on airflow, and therefore the heat exchange efficiency between the airflow and the fins is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a heat exchanger and an air conditioner. Background Art

[0002] As one of the core components of the air conditioning system, the heat exchange capacity of the heat exchanger directly affects the cooling and heating effects of the air conditioning. At the same time, the heat exchange capacity of the heat exchanger directly affects the energy efficiency of the air conditioning system, so improving the heat exchange effect of the heat exchanger can also reduce the energy consumption of the air conditioning operation.

[0003] In the related technology, the currently common heat exchanger fins are divided into flat fins, corrugated fins and slit fins. The slit fins have a strong ability to disturb the airflow, and compared with flat fins and corrugated fins, the outer tube convection heat transfer coefficient is higher, but the heat transfer effect of the heat exchanger fins needs to be further improved. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a heat exchanger, which can increase the heat exchange area of ​​the fin unit and can also generate multiple disturbances to the airflow, thereby improving the heat exchange efficiency between the airflow and the fins.

[0005] The utility model further provides an air conditioner.

[0006] According to the first aspect of the utility model, the heat exchanger comprises: a fin, wherein the fin comprises a plurality of fin units, wherein the plurality of fin units are connected in sequence, and each of the fin units is provided with a tube hole; a heat exchange tube, wherein the heat exchange tube is inserted into the tube hole, and a refrigerant flows in the heat exchange tube; the fin unit comprises: a corrugated section, wherein the corrugated section is protruded toward one side in the thickness direction of the fin unit, and wherein the corrugated section comprises a first inclined section and a second inclined section connected in sequence, wherein the first inclined section is inclined relative to the second inclined section, and wherein the first inclined section is provided with a first slit structure, wherein the first slit structure forms a first channel, and the second inclined section is provided with a second slit structure, wherein the second slit structure forms a second channel; wherein, along the airflow direction, one of the first channel and the second channel is configured as a tapered channel with decreasing width and the other is configured as a gradually expanding channel with increasing width.

[0007] Therefore, by providing the heat exchanger, the heat exchange area of ​​the fin unit can be increased, and multiple disturbances can be generated on the airflow, thereby improving the heat exchange efficiency between the airflow and the fins.

[0008] In some examples of the present invention, there are multiple first channels, and the multiple first channels are arranged along the width direction of the first slope section; there are multiple second channels, and the multiple second channels are arranged along the width direction of the second slope section, and the multiple first channels correspond one-to-one to the multiple second channels along the airflow direction.

[0009] In some examples of the present invention, multiple first channels include: a first tapered channel, the width of the first tapered channel decreases along the airflow direction; a first gradually expanding channel, the width of the first gradually expanding channel increases along the airflow direction, and the first tapered channel and the first tapered channel are staggered in the width direction of the first slope section; multiple second channels include: a second tapered channel, the width of the second tapered channel decreases along the airflow direction; a second gradually expanding channel, the width of the second gradually expanding channel increases along the airflow direction, and the second tapered channel and the second tapered channel are staggered in the width direction of the second slope section; along the airflow direction, the first tapered channel corresponds to the second gradually expanding channel, and the first gradually expanding channel corresponds to the second tapered channel.

[0010] In some examples of the present invention, the first slit structure includes: a first louver, the first louver is inclined relative to the first sloped section; a second louver, the first louver and the second louver are staggered in the width direction of the first sloped section, the second louver is respectively inclined relative to the first sloped section and the first louver, and the second louver and two adjacent first louvers respectively form the first tapered channel and the first gradually expanding channel; the second slit structure includes: a third louver, the third louver is inclined relative to the second sloped section; a fourth louver, the third louver and the fourth louver are staggered in the width direction of the second sloped section, the fourth louver is respectively inclined relative to the second sloped section and the third louver, and the fourth louver and two adjacent third louvers respectively form the second tapered channel and the second gradually expanding channel.

[0011] In some examples of the present invention, the width of the inlet of the first gradually converging channel is h1, the width of the inlet of the first gradually expanding channel is h2, h1 and h2 satisfy the relationship: 0.9≤h1 / h2≤1.1; the slit angle of the first louver is α1, the slit angle of the second louver is α2, α1 and α2 satisfy the relationship: 5°≤α1-α2≤15°

[0012] In some examples of the present invention, the height of the corrugated section protruding toward one side of the thickness direction of the fin unit is h3, and h3 satisfies the relationship: 0.3mm≤h3≤0.7mm; and / or the width of the corrugated section is w, and w satisfies the relationship: 3mm≤w≤5mm.

[0013] In some examples of the present invention, the connecting line between the first bevel segment and the second bevel segment and the plane where the thickness direction of the fin unit is located are the dividing interface; the first bevel segment and the second bevel segment are symmetrically arranged about the dividing interface, and the first slit structure and the second slit structure are symmetrically arranged about the dividing interface.

[0014] In some examples of the present invention, there are multiple corrugated sections, and the multiple corrugated sections are distributed at intervals on the fin unit.

[0015] In some examples of the present invention, the fin unit further includes: a straight section connected to both ends of the corrugated section in the width direction; and / or a third slit structure connected to both ends of the corrugated section in the width direction.

[0016] An air conditioner according to a second aspect of the utility model comprises: the above-mentioned heat exchanger.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the utility model;

[0020] Figure 2 is a partial structural schematic diagram of a fin according to an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A magnified image of area A;

[0022] Figure 4 is a partial structural front view of a fin according to an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 A1-A1 cross-sectional view;

[0024] Figure 6 is a front view of a fin unit according to an embodiment of the utility model;

[0025] Figure 7 yes Figure 6 A cross-sectional view along the A2-A2 direction;

[0026] Figure 8 is a partial structural schematic diagram of a fin according to another embodiment of the utility model;

[0027] Fig. 9 yes Figure 8 Enlarged view of area B;

[0028] Fig.10 is a partial structural front view of a fin according to another embodiment of the utility model;

[0029] Fig.11 yes Fig.10 Cross-sectional view along the B1-B1 direction;

[0030] Fig.12 is a front view of a fin unit according to another embodiment of the utility model;

[0031] Fig.13 yes Fig.12 Cross-sectional view along the B2-B2 direction;

[0032] Fig.14 is a partial structural schematic diagram of a fin according to another embodiment of the utility model;

[0033] Fig.15 yes Fig.14 Enlarged view of the middle C area;

[0034] Fig.16 is a partial structural front view of a fin according to another embodiment of the utility model;

[0035] Fig.17 yes Fig.16 Cross-sectional view along the C1-C1 direction;

[0036] Fig.18 is a front view of a fin unit according to another embodiment of the utility model;

[0037] Fig.19 yes Fig.18 Cross-sectional view along the C2-C2 direction;

[0038] Fig. 20 It is a side view of a fin unit according to another embodiment of the utility model.

[0039] Reference numerals:

[0040] 100. Heat exchanger;

[0041] 1. fin; 11. fin unit; 111. tube hole; 112. corrugated section;

[0042] 113, first inclined surface section; 1131, first slot structure; 1132, first channel; 1133, first gradually contracting channel; 1134, first gradually expanding channel; 1135, first louver; 1136, second louver;

[0043] 114, second inclined surface section; 1141, second slot structure; 1142, second channel; 1143, second gradually contracting channel; 1144, second gradually expanding channel; 1145, third louver; 1146, fourth louver;

[0044] 115. Straight section; 116. Third slot structure; 117. Corrugated inlet section;

[0045] 2. Heat exchange tubes. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0047] Reference below Figure 1-Figure 20 A heat exchanger 100 and an air conditioner according to an embodiment of the present invention are described.

[0048] Combination Figure 1-Figure 20 As shown, the heat exchanger 100 according to the first embodiment of the utility model includes fins 1 and heat exchange tubes 2. The heat exchange tubes 2 can be used as a medium for heat exchange between the refrigerant and the outside air, and the refrigerant (low-temperature and low-pressure liquid in the evaporator and high-temperature and high-pressure gas in the condenser) can flow inside the heat exchange tubes 2. The fins 1 are usually tightly attached to the outer surface of the heat exchange tubes 2, which can effectively increase the contact area between the air and the heat exchange tubes 2, thereby accelerating the heat transfer speed and improving the heat exchange efficiency.

[0049] Specifically, the fin 1 includes a plurality of fin units 11 , and the plurality of fin units 11 are connected in sequence.

[0050] It can be understood that the fin 1 includes a plurality of fin units 11 connected in sequence, so that the manufacturing specifications of the fin units 11 can be unified, thereby improving production efficiency.

[0051] Furthermore, each fin unit 11 is provided with a tube hole 111 , the heat exchange tube 2 is passed through the tube hole 111 , and a refrigerant flows through the heat exchange tube 2 .

[0052] That is to say, each fin unit 11 can be connected to the heat exchange tube 2 through the tube hole 111, so as to finally achieve the heat exchange effect between the fin 1 and the heat exchange tube 2, thereby improving the heat exchange efficiency.

[0053] Specifically, the fin unit 11 includes a corrugated section 112 which protrudes toward one side in the thickness direction of the fin unit 11 . The corrugated section 112 includes a first slope section 113 and a second slope section 114 which are connected in sequence. The first slope section 113 is inclined relative to the second slope section 114 .

[0054] It can be understood that the corrugated section 112 changes continuously in the thickness direction (that is, the corrugated section 112 forms an undulating shape in the thickness direction), and the first inclined section 113 and the second inclined section 114 connected in sequence are jointly constructed to form an inverted V-shaped convex shape, so that the mutually inclined first inclined section 113 and the second inclined section 114 can define a windward slope and a leeward slope, thereby increasing the heat exchange contact area with the airflow, and increasing the disturbance effect on the airflow, thereby improving the heat exchange efficiency between the airflow and the fin 1.

[0055] Furthermore, the first inclined surface section 113 is provided with a first slot structure 1131 , which forms a first channel 1132 , and the second inclined surface section 114 is provided with a second slot structure 1141 , which forms a second channel 1142 .

[0056] That is to say, the first slit structure 1131 and the second slit structure 1141 are respectively provided on the first slit section 113 and the second slit structure 1141 respectively form a first channel 1132 and a second channel 1142 for airflow circulation, which can play a role in guiding and controlling the airflow, increase the contact area between the fin unit 11 and the airflow, and further increase the disturbance effect on the airflow, thereby improving the heat exchange efficiency.

[0057] Furthermore, along the air flow direction, one of the first channel 1132 and the second channel 1142 is configured as a tapered channel with a decreasing width, and the other of the first channel 1132 and the second channel 1142 is configured as a divergent channel with an increasing width.

[0058] It can be understood that, along the flow direction of the airflow, the first channel 1132 can be transformed into a tapered channel with a gradually decreasing channel width, and the second channel 1142 can be transformed into a gradually expanding channel with a gradually increasing channel width. In this way, the airflow can first pass through the tapered channel and then through the gradually expanding channel, thereby causing periodic disturbances in the airflow, thereby enhancing the heat exchange effect between the airflow and the fin 1.

[0059] Among them, when the air flow flows in from the tapered channel, the tapered channel can speed up the flow rate of the air flow, thereby improving the heat exchange efficiency; when the air flow flows out from the gradually expanding channel, the gradually expanding channel can slow down the flow rate of the air flow after passing through the tapered channel, thereby achieving the effect of smoothing the air flow and avoiding turbulence and noise caused by sudden cross-sectional changes.

[0060] In addition, when the airflow flows in from the gradually expanding channel, the gradually converging channel can absorb and guide more airflow into the gradually expanding channel, thereby effectively destroying the lateral vortex generated by the flow of the airflow and increasing the disturbance to the airflow; when the airflow flows out from the gradually converging channel again, the gradually converging channel can speed up the flow rate of the airflow, thereby improving the heat exchange efficiency.

[0061] In particular, when the airflow flows through the surface of the fin 1, the corrugated section 112 plays a primary turbulence role, promoting the flow and heat exchange of the airflow between the fin units 11. When the airflow flows through the first slit structure 1131 and the second slit structure 1141, it plays a secondary turbulence role, promoting the flow and heat exchange inside the fin unit 11. Moreover, the airflow enters from the first channel 1132 and flows out from the second channel 1142, thereby forming a gradually expanding or contracting channel for the airflow, causing the airflow to produce periodic disturbances, thereby further enhancing the heat exchange effect between the airflow and the fin 1.

[0062] Therefore, by providing the heat exchanger 100 , the heat exchange area of ​​the fin unit 11 can be increased, and multiple disturbances can be generated on the airflow, thereby improving the heat exchange efficiency between the airflow and the fins 1 .

[0063] According to some optional embodiments of the present invention, combined with Figure 7 , Fig.13 and Fig.19 As shown, there are multiple first channels 1132 , and the multiple first channels 1132 are arranged along the width direction of the first slope section 113 .

[0064] Specifically, multiple first channels 1132 are arranged at intervals along the width direction of the first slope section 113, which can increase the heat exchange contact area between the fin unit 11 and the airflow, and can also enhance the intensity of airflow mixing between adjacent channels and improve the turbulence effect, thereby improving the heat exchange efficiency between the fin 1 and the airflow.

[0065] Furthermore, combined with Figure 7 , Fig.13 and Fig.19 As shown, there are multiple second channels 1142 , and the multiple second channels 1142 are arranged along the width direction of the second slope section 114 .

[0066] That is to say, multiple second channels 1142 are arranged at intervals along the width direction of the first slope section 113, which can increase the heat exchange contact area between the fin unit 11 and the airflow, and can also enhance the intensity of airflow mixing between adjacent channels and improve the turbulence effect, thereby improving the heat exchange efficiency between the fin 1 and the airflow.

[0067] Among them, multiple first channels 1132 and multiple second channels 1142 correspond one by one along the airflow direction, so that the airflow can flow more smoothly from the first channel 1132 to the second channel 1142, thereby accelerating the flow of air inside the corrugated section 112, thereby improving the heat exchange efficiency of the fin 1.

[0068] Specifically, combined Figure 7 , Fig.13 and Fig.19 As shown, the multiple first channels 1132 include a first tapered channel 1133 and a first gradually expanding channel 1134, the width of the first tapered channel 1133 decreases along the airflow direction, the width of the first gradually expanding channel 1134 increases along the airflow direction, and the first tapered channel 1133 and the first tapered channel 1133 are alternately arranged in the width direction of the first slope section 113.

[0069] It can be understood that, as arranged above, a staggered first tapered channel 1133 and a first gradually expanding channel 1134 can be formed on the first inclined surface section 113. This can effectively increase the heat exchange contact area between the fin 1 and the airflow on the one hand, and can also enhance the intensity of airflow mixing between adjacent channels and improve the turbulence effect, thereby improving the heat exchange efficiency between the fin 1 and the airflow on the other hand.

[0070] Furthermore, combined with Figure 7 , Fig.13 and Fig.19 As shown, the multiple second channels 1142 include a second tapered channel 1143 and a second gradually expanding channel 1144, the width of the second tapered channel 1143 decreases along the airflow direction, the width of the second gradually expanding channel 1144 increases along the airflow direction, and the second tapered channel 1143 and the second tapered channel 1143 are alternately arranged in the width direction of the second slope section 114.

[0071] That is to say, as arranged above, a second tapered channel 1143 and a second gradually expanding channel 1144 arranged in an alternating manner can be formed on the second inclined surface section 114. This can effectively increase the heat exchange contact area between the fin 1 and the airflow on the one hand, and can also enhance the intensity of airflow mixing between adjacent channels and improve the turbulence effect, thereby improving the heat exchange efficiency between the fin 1 and the airflow on the other hand.

[0072] In which, along the airflow direction, the first gradually converging channel 1133 corresponds to the second gradually expanding channel 1144 , and the first gradually expanding channel 1134 corresponds to the second gradually converging channel 1143 .

[0073] It can be understood that the airflow can flow from the first gradually converging channel 1133 to the second gradually expanding channel 1144, and can also flow from the first gradually expanding channel 1134 to the second gradually expanding and converging channel. This can cause periodic disturbances in the airflow and increase the intensity of air mixing inside the corrugated section 112, thereby enhancing the heat exchange effect between the airflow and the fin 1.

[0074] Specifically, combined Figure 7 , Fig.13 and Fig.19 As shown, the first slit structure 1131 includes a first louver 1135 and a second louver 1136. The first louver 1135 is inclined relative to the first inclined surface section 113. The first louver 1135 and the second louver 1136 are alternately arranged in the width direction of the first inclined surface section 113. The second louver 1136 is inclined relative to the first inclined surface section 113 and the first louver 1135, respectively. The second louver 1136 and the two adjacent first louvers 1135 respectively form a first tapered channel 1133 and a first gradually expanding channel 1134.

[0075] That is to say, the first louver 1135 and the second louver 1136 on the first inclined section 113 form a staggered distribution in the thickness direction of the corrugated section 112, which can effectively enhance the mixing intensity of the airflow inside the fin unit 11 and effectively destroy the boundary layer of the airflow, thereby enhancing the disturbance effect of the airflow and further improving the heat exchange efficiency.

[0076] Among them, an air flow channel can be formed between two adjacent louvers for air flow to pass through, and the air flow channel can not only disturb the air flow, but also increase the contact area between the fin unit 11 and the air flow, thereby effectively improving the heat exchange efficiency of the fin 1.

[0077] Furthermore, combined with Figure 7 , Fig.13 and Fig.19 As shown, the second slit structure 1141 includes a third louver 1145 and a fourth louver 1146. The third louver 1145 is inclined relative to the second inclined surface section 114. The third louver 1145 and the fourth louver 1146 are staggered in the width direction of the second inclined surface section 114. The fourth louver 1146 is inclined relative to the second inclined surface section 114 and the third louver 1145, respectively. The fourth louver 1146 and the two adjacent third louvers 1145 respectively form a second tapered channel 1143 and a second gradually expanding channel 1144.

[0078] It can be understood that the third louver 1145 and the fourth louver 1146 on the second inclined section 114 form a staggered distribution in the thickness direction of the corrugated section 112, which can effectively enhance the mixing intensity of the airflow inside the fin unit 11 and effectively destroy the boundary layer of the airflow, thereby enhancing the disturbance effect of the airflow and further improving the heat exchange efficiency.

[0079] Among them, an air flow channel can be formed between two adjacent louvers for air flow to pass through, and the air flow channel can not only disturb the air flow, but also increase the contact area between the fin unit 11 and the air flow, thereby effectively improving the heat exchange efficiency of the fin 1.

[0080] Specifically, combined Figure 7 As shown, the width of the inlet of the first gradually converging channel 1133 is h1, and the width of the inlet of the first gradually expanding channel 1134 is h2, and h1 and h2 satisfy the relationship: 0.9≤h1 / h2≤1.1.

[0081] That is, the width of the inlet of the first tapered channel 1133 is slightly different from the width of the inlet of the first gradually expanding channel 1134, so that the first tapered channel 1133 and the second tapered channel 1143 are not parallel structures, thereby increasing the heat exchange contact area between the airflow and the fin unit 11, and facilitating the formation of adjacent gradually expanding channels and tapered channels, so that the airflow can be periodically disturbed, thereby enhancing the enhanced heat exchange effect between the airflow and the fin 1. For example, h1 / h2 can be 0.9, 0.95 and 1.1, but is not limited thereto.

[0082] Furthermore, combined with Figure 7 As shown, the opening angle of the first louver 1135 is α1, and the opening angle of the second louver 1136 is α2. α1 and α2 satisfy the relationship: 5°≤α1-α2≤15°

[0083] It can be understood that the opening angle of the first louver 1135 is slightly different from the opening angle of the second louver 1136, which makes it easier for the first louver 1135 and the second louver 1136 to form a first tapered channel 1133 and a first gradually expanding channel 1134 of different widths, thereby effectively destroying the lateral vortex generated by the flow of air while increasing the heat exchange contact area between the airflow and the fin 1, thereby improving the heat exchange efficiency.

[0084] According to some optional embodiments of the present invention, combined with Figure 7 As shown, the height of the corrugated section 112 protruding toward one side of the thickness direction of the fin unit 11 is h3, and h3 satisfies the relationship: 0.3mm≤h3≤0.7mm.

[0085] If the height of the corrugated section 112 protruding toward one side of the thickness direction of the fin unit 11 is too large, the overall volume of the fin unit 11 will be increased, while if it is too low, the heat exchange effect will be reduced. Therefore, the height h3 of the corrugated section 112 protruding toward one side of the thickness direction of the fin unit 11 is designed to be greater than or equal to 0.3 mm and less than or equal to 0.7 mm, which can ensure the heat exchange effect and avoid the overall volume being too large, reduce the production cost, and thus take into account both practicality and economy. For example, h3 can be 0.3 mm, 0.4 mm, 0.5 mm and 7 mm, but is not limited thereto.

[0086] Furthermore, combined with Figure 7 As shown, the width of the corrugated section 112 is w, and w satisfies the relationship: 3mm≤w≤5mm. That is to say, if the width of the corrugated section 112 is too narrow, it will affect the strength of the fin 1 (because the first slit structure 1131 and the second slit structure 1141 are constructed on the corrugated section 112), and if the width is too wide, it will affect the disturbance effect on the airflow. Therefore, the width of the corrugated section 112 is designed to be greater than or equal to 3mm and less than or equal to 5mm, which ensures the strength of the fin 1 and the disturbance effect on the airflow. For example, w can be 3mm, 3.5mm, 4mm and 5mm, but is not limited thereto.

[0087] According to some optional embodiments of the present invention, combined with Figure 6 and Figure 7 As shown, the connecting line between the first bevel segment 113 and the second bevel segment 114 and the plane where the thickness direction of the fin unit 11 is located are the dividing interface; the first bevel segment 113 and the second bevel segment 114 are symmetrically arranged about the dividing interface, and the first slit structure 1131 and the second slit structure 1141 are symmetrically arranged about the dividing interface.

[0088] Specifically, the first bevel section 113 and the second bevel section 114 are symmetrically arranged with respect to the boundary surface, and the first slit structure 1131 on the first bevel section 113 and the second slit structure 1141 on the second bevel section 114 are symmetrically arranged with respect to the boundary surface. Such an arrangement can facilitate production and manufacturing, and also contribute to balanced heat distribution of airflow, avoiding structural warping and angular deviation caused by thermal asymmetry, thereby improving processing and manufacturing performance and heat exchange efficiency.

[0089] According to some optional embodiments of the present invention, combined with Figure 5 and Fig.17 As shown, there are multiple corrugated sections 112, and the multiple corrugated sections 112 are spaced apart on the fin unit 11. Such an arrangement can increase the heat exchange contact area between the fin unit 11 and the airflow, and can also allow the airflow to pass through the first channel 1132 and the second channel 1142 formed on the corrugated section 112 for multiple times, thereby forming a periodic disturbance on the heat exchange airflow, thereby improving the heat exchange efficiency of the fin 1.

[0090] According to some optional embodiments of the present invention, combined with Fig.11 As shown, the fin unit 11 further includes a straight section 115 , and the straight section 115 is connected to both ends of the corrugated section 112 in the width direction.

[0091] Specifically, the two ends of the corrugated section 112 in the width direction are connected with straight sections 115, so that the straight sections 115 can guide the airflow in advance, so that the airflow flows more smoothly to the corrugated section 112, thereby improving the smoothness of the air intake of the heat exchange airflow. The straight sections 115 can also enhance the structural strength of the fin 1 to a certain extent.

[0092] Furthermore, combined with Fig.15 As shown, the fin unit 11 also includes a third slit structure 116, which is connected to both ends of the corrugated section 112 in the width direction. This can further enhance the disturbance effect on the incoming flow, thereby effectively destroying the lateral vortex generated when the airflow flows, and can also increase the heat exchange contact area between the fin 1 and the airflow, thereby improving the heat exchange efficiency.

[0093] Furthermore, combined with Fig. 20 As shown, the fin unit 11 is provided with a corrugated inlet section along the length direction of the fin unit 11, which can further enhance the structural strength of the fin unit 11 and the heat exchange area between the fin unit 11 and the airflow, thereby improving its structural reliability and practicality.

[0094] The air conditioner according to the embodiment of the second aspect of the utility model includes the heat exchanger 100 of the above-mentioned embodiment. Compared with the fin 1 type commonly used in the heat exchanger 100, the fin 1 in this case can effectively increase the flow channel of the airflow in the heat exchanger 100 under the same volume, increase the contact area with the incoming air, and at the same time, the high and low louvers are effectively arranged to effectively enhance the mixing intensity between adjacent flow channels on the fin 1 side of the heat exchanger 100. The arranged first slit structure 1131 and the second slit structure 1141 can also effectively destroy the boundary layer of the airflow, enhance the disturbance of the airflow, and improve the heat exchange effect.

[0095] At the same time, through the multiple first channels 1132 and second channels 1142 arranged in sequence, the direction of the airflow passing through the heat exchanger 100 can be controlled, and a periodic disturbance effect on the airflow can be generated, thereby improving the heat exchange efficiency of the heat exchanger 100. The fin 1 proposed in this case can effectively improve the heat exchange capacity of the heat exchanger 100, and under the same heat exchange capacity, the overall volume of the heat exchanger 100 can be reduced, reducing the production cost; under the same volume of the heat exchanger 100, the energy efficiency ratio of the air conditioner can be effectively improved.

[0096] Optionally, three embodiments of the fin 1 will be described in detail below:

[0097] Combination Figure 2-Figure 7 The following is an introduction to Example 1:

[0098] The fin 1 comprises a straight section 115 at both side edges along the width direction and two corrugated sections 112 located therebetween. Each corrugated section 112 has a first slope section 113 and a second slope section 114.

[0099] In the above structure, the height h3 of the corrugated section 112 is 0.3mm-0.7mm, the width W of the corrugated section 112 is 3mm-5mm, the number of the corrugated sections 112 is not limited, and 1-4 are recommended. According to the direction of air flow, the corrugated section 112 can be divided into a windward slope (that is, the first slope section 113) and a leeward slope (that is, the second slope section 114). The angle D between the slope and the horizontal plane is 10°-20°, and 13.5° is recommended. The same number of slit structures (that is, the first slit structure 1131 and the second slit structure 1141) are arranged on the windward slope and the leeward slope, and are symmetrical with the dividing interface. The range of the slit angles α1 and α2 is 10°-30°, and 25.3° is recommended. In order to allow the incoming flow to enter the slit of the corrugated slope evenly, the slit angles α1 of the adjacent first louvers 1135 are set to the same angle in this embodiment, while the slit angles α2 of the second louvers 1136 are different from the slit angles α1 of the adjacent first louvers 1135. In order to ensure that h1:h2 is between 0.9-1.1, 5°≤α1-α2≤15° is set, and 10° is recommended. From this structure, it can be seen that the second louver 1136 can form a first gradually expanding channel 1134 and a first gradually contracting channel 1133 with the adjacent first louver 1135, and the fourth louver 1146 can form a second gradually expanding channel 1144 and a second gradually contracting channel 1143 with the adjacent third louver 1145. The incoming flow will form two airflows when passing through the slits. One airflow enters from the first gradually expanding channel 1134 and flows out from the second gradually contracting channel 1143. The other airflow enters from the first gradually contracting channel 1133 and flows out from the second gradually expanding channel 1144. The gradually expanding and contracting channels formed thereby cause periodic disturbances in the airflow, thereby enhancing the enhanced heat exchange effect between the airflow and the fin 1. Through the enhanced heat exchange of the above-mentioned fin 1 structure, the heat exchange coefficient outside the tube of this structure is increased by 20.4% compared with ordinary corrugated sheets, and the heat exchange coefficient outside the tube is increased by 3.2% compared with traditional window sheets.

[0100] Combination Figure 8-Figure 13 Example 2 is shown as follows:

[0101] It adopts the characteristics of combining window panels with corrugated slit panels.

[0102] The fin 1 includes a straight section 115 at both side edges along the width direction and two corrugated sections 112 in the middle. Each corrugated section 112 has a first slope section 113 and a second slope section 114 .

[0103] In the above structure, the air first passes through the straight section 115 (that is, W2), and then passes through the corrugated section 112 (that is, W1), and is symmetrically arranged with the dividing line. That is, the width of fin 1 = 2*(W1+W2). There are two corrugated sections 112, and the slit angle E on the straight section 115 ranges from 20° to 30°, and 25.3° is recommended. Similarly, if the slit angle has different values, it forms a gradually converging or expanding channel, which is also within the protection range. Among them, the value range of L1 is 0.5mm-1mm, preferably 0.75mm, the value range of L2 is between 1.5mm-2.5mm, preferably 2mm, and the value range of L3 is between 0.5mm-1mm, preferably 0.75mm.

[0104] Combination Figure 14-Figure 19 Example 3 is shown as follows:

[0105] The difference from Example 1 is that the straight section 115 in Example 1 is improved into a corrugated shape to further increase the turbulence of the incoming flow. In Example 3, the corrugated inlet section 117 of the incoming flow is designed to be a corrugated shape. In one fin unit 11, the number of corrugations is an integer, the corrugation width is W3, and the corrugation height h4 ranges from 0.2 mm to 0.4 mm, and 0.3 mm is recommended.

[0106] In order to explain the advantages of the solution in this case in detail, for the double-row heat exchanger, CFD simulation technology was used to perform numerical simulation calculations on the corrugated sheet, the traditional straight window sheet, and the second embodiment of this patent. Under the same boundary conditions (inlet velocity 2m / s, inlet temperature 35°C, tube wall temperature 45°), the simulated tube external convection heat transfer coefficient and heat transfer are shown in the following table. As can be seen from the table, the third embodiment of this patent has a certain degree of improvement in the tube external convection heat transfer coefficient and heat transfer compared to the corrugated sheet and the window sheet. Among them, the second embodiment has a 20.4% increase in the tube external heat transfer coefficient and a 6.8% increase in heat transfer compared to the corrugated sheet; compared to the traditional window sheet, the tube external heat transfer coefficient is increased by 3.2% and the heat transfer is increased by 1.8%.

[0107] Table 1 Performance comparison of different fin structures

[0108]

[0109] From the comparison of relevant flow fields, it can also be found that the second embodiment of the present case has a higher speed at the circular tube position and a wider distribution range of the high-speed area. Since the tube wall is a high-temperature area, it is obvious that the fin scheme of the second embodiment can further increase the turbulence of the tube gap, so the corresponding external tube convection heat transfer coefficient and heat transfer amount are also the largest.

[0110] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0111] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0113] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0114] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0115] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchanger, comprising: A fin, wherein the fin comprises a plurality of fin units, the plurality of fin units are connected in sequence, and each of the fin units is provided with a tube hole; A heat exchange tube, wherein the heat exchange tube is inserted into the tube hole and a refrigerant flows through the heat exchange tube; It is characterized in that The fin unit comprises: a corrugated section, the corrugated section is protruding toward one side of the thickness direction of the fin unit, the corrugated section includes a first inclined surface section and a second inclined surface section connected in sequence, the first inclined surface section is inclined relative to the second inclined surface section, the first inclined surface section is provided with a first slit structure, the first slit structure forms a first channel, the second inclined surface section is provided with a second slit structure, the second slit structure forms a second channel; in, Along the air flow direction, one of the first channel and the second channel is configured as a gradually contracting channel with a gradually decreasing width, and the other is configured as a gradually expanding channel with a gradually increasing width.

2. The heat exchanger according to claim 1, characterized in that: There are a plurality of the first channels, and the plurality of the first channels are arranged along the width direction of the first slope section; There are a plurality of the second channels, and the plurality of the second channels are arranged along the width direction of the second slope section, and the plurality of the first channels correspond one to one with the plurality of the second channels along the airflow direction.

3. The heat exchanger according to claim 2, characterized in that: The plurality of said first channels comprises: A first tapered channel, wherein the width of the first tapered channel decreases along the airflow direction; a first gradually expanding channel, wherein the width of the first gradually expanding channel increases gradually along the airflow direction, and the first gradually converging channel and the first gradually converging channel are arranged alternately in the width direction of the first inclined surface section; The plurality of said second channels comprises: a second tapered channel, wherein the width of the second tapered channel decreases along the airflow direction; a second gradually expanding channel, wherein the width of the second gradually expanding channel increases gradually along the airflow direction, and the second gradually converging channel and the second gradually converging channel are arranged alternately in the width direction of the second inclined surface section; Along the airflow direction, the first gradually converging channel corresponds to the second gradually expanding channel, and the first gradually expanding channel corresponds to the second gradually converging channel.

4. The heat exchanger according to claim 3, characterized in that: The first slotted structure comprises: a first louver, wherein the first louver is arranged obliquely relative to the first inclined surface section; second louvers, wherein the first louvers and the second louvers are arranged alternately in the width direction of the first inclined surface section, the second louvers are arranged obliquely relative to the first inclined surface section and the first louvers, respectively, and the second louvers and two adjacent first louvers respectively form the first gradually contracting channel and the first gradually expanding channel; The second slit structure includes: a third louver, wherein the third louver is arranged obliquely relative to the second inclined surface section; The fourth louver, the third louver and the fourth louver are arranged alternately in the width direction of the second inclined surface section, the fourth louver is inclined relative to the second inclined surface section and the third louver respectively, and the fourth louver and the two adjacent third louvers respectively form the second gradually converging channel and the second gradually expanding channel.

5. The heat exchanger according to claim 4, characterized in that: The width of the inlet of the first gradually converging channel is h1, and the width of the inlet of the first gradually expanding channel is h2, and h1 and h2 satisfy the relationship: 0.9≤h1 / h2≤1.1; The opening angle of the first louver is α1, and the opening angle of the second louver is α2. α1 and α2 satisfy the relationship: 5°≤α1-α2≤15°.

6. The heat exchanger according to claim 1, characterized in that: The height of the corrugated section protruding toward one side of the thickness direction of the fin unit is h3, and h3 satisfies the relationship: 0.3mm≤h3≤0.7mm; and / or The width of the corrugated section is w, and w satisfies the relationship: 3mm≤w≤5mm.

7. The heat exchanger according to claim 1, characterized in that A connecting line between the first inclined surface segment and the second inclined surface segment and a plane where the thickness direction of the fin unit is located are the interface; The first inclined surface segment and the second inclined surface segment are symmetrically arranged with respect to the interface, and the first slit structure and the second slit structure are symmetrically arranged with respect to the interface.

8. The heat exchanger according to claim 1, characterized in that There are a plurality of corrugated sections, and the plurality of corrugated sections are distributed at intervals on the fin unit.

9. The heat exchanger according to claim 1, characterized in that: The fin unit further comprises: a straight section, wherein the straight section is connected to both ends of the corrugated section in the width direction; and / or A third slit structure is connected to two ends of the corrugated section in the width direction.

10. An air conditioner, characterized in that: include: The heat exchanger according to any one of claims 1 to 9.

Images