Outdoor unit

Abstract

The invention discloses an outdoor unit. The outdoor unit comprises a shell; the two axial ends of the axial flow fan face the first air inlet and the air outlet correspondingly. The heat exchanger comprises a first heat exchange section, a first bent section and a second bent section, and the first bent section and the second bent section are connected to the two opposite ends of the first heat exchange section; in the direction away from the first heat exchange section, the first bent section and the second bent section are both bent towards the air outlet, and the width, from the first bent section to the second bent section, of the heat exchanger is larger than the diameter of the axial flow fan. The outdoor unit is provided with an axial flow fan, so that the larger air volume can be ensured under the same power. The heat exchanger is constructed to be more matched with an air flow field streamline of the axial flow fan, air flow resistance can be reduced, flow velocity distribution uniformity on the heat exchanger is improved, the heat exchanger is wider in air flow field distribution angle range under the same width, and heat exchange efficiency of the heat exchanger can be improved. And after the wind resistance is reduced, the noise can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly to an outdoor unit. Background Art

[0002] In related technologies, most of the air conditioner outdoor units adopt a heat exchange structure composed of an L-shaped heat exchanger and an axial flow fan. Relatively speaking, the wind force of the axial flow fan is large, but the wind resistance is also large after being combined with the heat exchanger, resulting in limited heat exchange efficiency of the heat exchanger of the air conditioner outdoor unit. However, if the axial flow fan is replaced with other types of fans, more fans need to be set up to achieve sufficient wind force, and a more complex air duct structure needs to be set up. Therefore, without replacing the axial flow fan, the structure of the heat exchanger needs to be further improved. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an outdoor unit, which improves the structure of the heat exchanger without replacing the axial flow fan, and the improvement cost is not high after the structure is improved, and the heat exchange efficiency of the heat exchanger can be guaranteed.

[0004] The outdoor unit according to an embodiment of the present invention includes: a housing, with a first air inlet and an air outlet provided on opposite sides of the housing; an axial flow fan installed in the housing, with the axial two ends of the axial flow fan respectively facing the first air inlet and the air outlet; a heat exchanger, which includes a first heat exchange section, a first bending section and a second bending section, the first heat exchange section is located on the side of the axial flow fan facing the first air inlet, and the first bending section and the second bending section are connected to opposite ends of the first heat exchange section; wherein, in the direction away from the first heat exchange section, both the first bending section and the second bending section are bent towards the air outlet, and the width of the heat exchanger from the first bending section to the second bending section is greater than the diameter of the axial flow fan.

[0005] The outdoor unit according to an embodiment of the present invention retains the setting of the axial flow fan and ensures a large air volume under the same power. By providing a first bending section and a second bending section at both ends of the first heat exchange section of the heat exchanger, the heat exchanger is configured to be more in line with the streamline of the air flow field of the axial flow fan, reduce the resistance of air flow, improve the velocity distribution uniformity of the air flowing through the first heat exchange section, the first bending section, and the second bending section, increase the distribution angle range of the heat exchanger with the same width in the air flow field, thereby improving the heat exchange efficiency of the heat exchanger and the air conditioning effect of the outdoor unit. Moreover, after the wind resistance is reduced, it is beneficial to reduce noise.

[0006] In some embodiments, the outdoor unit further includes: a middle partition plate disposed within the housing to divide the interior of the housing into a first chamber and a second chamber. The axial flow fan is located within the first chamber, and the compressor of the outdoor unit is installed within the second chamber. One end of the first bent section, which is away from the first heat exchange section, is connected to the end of the middle partition plate.

[0007] Specifically, a portion of the middle partition plate adjacent to the heat exchanger is an extension plate. In the direction towards each other, both the first bent section and the extension plate extend in a direction away from the axis of the axial flow fan.

[0008] Further, the first bent section is a straight section, and the angle between the first bent section and the extension plate is γ, and γ≥90°.

[0009] In some specific embodiments, the dimension of the outdoor unit in the axial direction of the axial flow fan is the thickness. The thickness of the first chamber is greater than the thickness of the second chamber.

[0010] Specifically, the housing includes: a chassis; a top cover disposed opposite above the chassis; side plates connected between the top cover and the chassis. The side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate is located on the air outlet side of the axial flow fan. The second side plate and the third side plate are connected to opposite ends of the first side plate. The fourth side plate is disposed opposite to the first side plate and is connected to the third side plate.

[0011] Wherein, both ends of the middle partition plate are connected to the first side plate and the fourth side plate. The first chamber is defined by the middle partition plate, the second side plate, and a portion of the first side plate. The second chamber is defined by the middle partition plate, the third side plate, the fourth side plate, and a portion of the first side plate.

[0012] On the side opposite to the first side plate, a first air inlet is defined between the second side plate and the fourth side plate. The first bent section, the first heat exchange section, and the second bent section successively block the first air inlet.

[0013] Further, the heat exchanger includes a side plate disposed at the end of the first bent section. The side plate is connected to the middle partition plate, and the side plate and the middle partition plate are independent plates or integral plates.

[0014] In some embodiments, the first bent section is a straight section or an arc section, and the second bent section is a straight section or an arc section.

[0015] In some embodiments, the line connecting one end of the first bent section connected to the first heat exchange section and the other end far from the first heat exchange section is a first profile line, and the angle between the first profile line and the first heat exchange section is β, and 90° ≤ β ≤ 155° is satisfied.

[0016] In some embodiments, the heat exchanger further includes: a second heat exchange section, which is connected to the end of the second bent section far from the first heat exchange section, and the second heat exchange section is disposed adjacent to the side wall of the housing.

[0017] Specifically, the angle between the first heat exchange section and the second heat exchange section is α, and α ≥ 90° is satisfied.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a top view of an outdoor unit (without a top cover) according to an embodiment of the present invention;

[0021] Figure 2 is a top view of an outdoor unit (without a top cover) according to an embodiment of the present invention;

[0022] Figure 3 A top view of a heat exchanger according to some embodiments of the present invention;

[0023] Figure 4 A top view of a heat exchanger according to other embodiments of the present invention;

[0024] Figure 5 is an air flow field diagram of an outdoor unit in the related art;

[0025] Figure 6 is an air flow field diagram of an outdoor unit according to some embodiments of the present invention.

[0026] REFERENCE SIGNS:

[0027] Outdoor unit 100;

[0028] Housing 1, first air inlet 111, air outlet 112, air outlet grille 113, first chamber 121, second chamber 122, side plate 13, first side plate 131, second side plate 132, third side plate 133, fourth side plate 134, second air inlet 135, chassis 15;

[0029] Axial flow fan 2, motor bracket 21, motor 22, fan blade 23;

[0030] Heat exchanger 3, first heat exchange section 301, second heat exchange section 302, first bending section 311, second bending section 312, side plate 33;

[0031] Middle partition plate 4, extension plate 41;

[0032] Compressor 5;

[0033] First profile e;

[0034] Width d1 of the heat exchanger from the first bending section to the second bending section, diameter d2 of the axial flow fan, axis N, air streamline N1 outside the axial flow fan diameter range. Detailed implementation mode

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly defined 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Next, refer to Figures 1 - 6 Describe the outdoor unit 100 according to the embodiment of the present invention.

[0039] AsFigure 1 and Figure 2 As shown in Figure 2 , the outdoor unit 100 according to an embodiment of the present invention includes a housing 1, an axial flow fan 2, and a heat exchanger 3.

[0040] The housing 1 is provided with a first air inlet 111 and an air outlet 112, and the first air inlet 111 and the air outlet 112 are respectively located on opposite sides of the housing 1 (such as the front and rear sides shown in Figure 1 ). The axial flow fan 2 is installed in the housing 1, and the axial ends of the axial flow fan 2 are respectively arranged towards the first air inlet 111 and the air outlet 112. Driven by the rotating blades, the axial flow fan 2 sucks air into the housing 1 from the first air inlet 111 and blows it out towards the air outlet 112. Figure 1 As shown in Figure 1 and , the axis N of the axial flow fan 2 is arranged in the front - rear direction, the first air inlet 111 is arranged on the front side of the axial flow fan 2, and the air outlet 112 is arranged on the rear side of the axial flow fan 2. According to the blade characteristics of the axial flow fan 2, after the blades rotate around the axis N of the axial flow fan 2, air is sucked in from the suction surface of the blades, passes through the air flow channels between adjacent blades, and the pressure surface of the blades presses the air towards the air outlet 112. Therefore, when the axial flow fan 2 sucks in air, on one side of the suction surface (such as the front side of the axial flow fan 2 in

[0041] ), air within a 360° range around the axis N is sucked in and gradually converges towards the axial flow fan 2. On one side of the pressure surface (such as the rear side of the axial flow fan 2 in

[0041] ), after the axial flow fan 2 blows out air, the air leaves the constraint of the axial flow fan 2 and diffuses into a 360° range around the axis N.

[0041] In Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , on the air suction side of the axial flow fan 2, the air flow within the diameter d2 of the axial flow fan 2 is generally axially sucked into the axial flow fan 2. On the air suction side of the axial flow fan 2, for the air flow outside the diameter d2 of the axial flow fan 2, while being axially sucked in, the air flow also gradually converges radially towards the diameter d2 range of the axial flow fan 2. Therefore, for the air flow outside the diameter d2 of the axial flow fan 2, there is a flow direction from outside the diameter d2 range to within the diameter d2 range. As shown by the reference numeral N1 in Figure 1 , the flow path of a certain air flow outside the diameter d2 of the axial flow fan 2 is shown. Of course, as shown in and

[0042] , the air flow will bypass obstacles when flowing, and in Figure 5 and Figure 6 , the air streamlines will avoid the motor 22 of the axial flow fan 2, etc., which will not be considered in detail here. Figure 1 As shown in

[0041] , on one side of the suction surface (such as the front side of the axial flow fan 2 in

[0041] ), air within a 360° range around the axis N is sucked in and gradually converges towards the axial flow fan 2. On one side of the pressure surface (such as the rear side of the axial flow fan 2 in

[0041] ), after the axial flow fan 2 blows out air, the air leaves the constraint of the axial flow fan 2 and diffuses into a 360° range around the axis N.

[0042] As Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , on the air suction side of the axial flow fan 2, the air flow within the diameter d2 of the axial flow fan 2 is generally axially sucked into the axial flow fan 2. On the air suction side of the axial flow fan 2, for the air flow outside the diameter d2 of the axial flow fan 2, while being axially sucked in, the air flow also gradually converges radially towards the diameter d2 range of the axial flow fan 2. Therefore, for the air flow outside the diameter d2 of the axial flow fan 2, there is a flow direction from outside the diameter d2 range to within the diameter d2 range. As shown by the reference numeral N1 in Figure 1 , the flow path of a certain air flow outside the diameter d2 of the axial flow fan 2 is shown. Of course, as shown in Figure 5 and Figure 6 , the air flow will bypass obstacles when flowing, Figure 1 As shown by the reference numeral N1 in Figure 1 , the flow path of a certain air flow outside the diameter d2 of the axial flow fan 2 is shown. Of course, as shown in Figure 5 and Figure 6 , the air flow will bypass obstacles when flowing, Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , the air flow will bypass obstacles when flowing, Figure 5 and Figure 6 In Figure 5 and Figure 6 , the air streamlines will avoid the motor 22 of the axial flow fan 2, etc., which will not be considered in detail here.

[0043] It should be noted that when the air flow is within the reference cylindrical space, it is referred to as being within the diameter d2 range of the axial flow fan 2, asFigure 1 The range shown by the dashed rectangle in the middle. When the air flow is outside the reference cylindrical space, it is called outside the diameter d2 range of the axial flow fan 2. The reference cylindrical space has the axis N of the axial flow fan 2 as the central axis, and the diameter of the reference cylindrical space reaches d2.

[0044] In this application, the heat exchanger 3 includes a first heat exchange section 301, a first bending section 311, and a second bending section 312. The first heat exchange section 301 is located on the side of the axial flow fan 2 facing the first air inlet 111, and the first bending section 311 and the second bending section 312 are connected to opposite ends of the first heat exchange section 301. That is to say, the heat exchanger 3 is at least on the air suction side of the axial flow fan 2 in the first heat exchange section 301. Air is sucked into the housing 1 from the first air inlet 111, passes through the heat exchanger 3 and exchanges heat with the heat exchanger 3, and the heated air is blown out from the air outlet 112.

[0045] In the solution of this application, the first bending section 311 and the second bending section 312 are arranged at both ends of the first heat exchange section 301 of the heat exchanger 3. In the direction away from the first heat exchange section 301, both the first bending section 311 and the second bending section 312 are bent towards the air outlet 112, and the width d1 of the heat exchanger 3 from the first bending section 311 to the second bending section 312 (as Figure 3 shown) is greater than the diameter d2 of the axial flow fan 2 (as Figure 1 shown). As Figure 1 shown in, the heat exchanger 3 extends substantially in the left-right direction from the first bending section 311 to the second bending section 312. The first bending section 311 is located at the right end of the first heat exchange section 301, and at least part of the first bending section 311 is outside the diameter d2 range of the axial flow fan 2. The second bending section 312 is located at the left end of the first heat exchange section 301, and at least part of the second bending section 312 is outside the diameter d2 range of the axial flow fan 2.

[0046] Since the first heat exchange section 301 faces the suction surface of the axial flow fan 2, most of the air flow within the diameter d2 range of the axial flow fan 2 blows through the first heat exchange section 301 and then flows towards the axial flow fan 2. In some solutions, part of the air flow within the diameter d2 range of the axial flow fan 2 blows through the first bending section 311 and the second bending section 312 and then flows towards the axial flow fan 2. Since the air within the 360-degree range around the axis N is sucked in on the upstream side, part of the air flow outside the diameter d, range of the axial flow fan 2 blows through the first bending section 311 and the second bending section 312 and then flows towards the axial flow fan 2. As Figure 6 shown in, at the first bending section 311 and the second bending section 312, the air flow direction experiences a turn from outside the diameter d2 range of the axial flow fan 2 to within the diameter d2 range of the axial flow fan 2.

[0047] Therefore, the heat exchanger 3 with such a structure is more in line with the streamline of the air flow field of the axial flow fan 2, enabling some of the air flow that turns from outside the diameter d2 range of the axial flow fan 2 to within the diameter d2 range of the axial flow fan 2 to flow through the first bending section 311 and the second bending section 312 almost perpendicularly. In this way, not only can most of the air flow pass through the heat exchanger 3 for sufficient heat exchange to ensure the heat exchange efficiency, but also the flow field resistance of the air flow passing through the heat exchanger 3 can be reduced.

[0048] Compared with the heat exchanger with a straight plate structure or an L-shaped structure, for the heat exchanger 3 with the structure of the present application, when the air flow passes through the first heat exchange section 301, the first bending section 311, and the second bending section 312, the flow field velocity is generally more evenly distributed. In this way, the heat exchange efficiency of the air flow with each section of the heat exchanger 3 can be balanced. Moreover, on the premise of the same width, the heat exchanger 3 of the present application can be extended to a wider coverage angle, which helps the air flow in a wider range to pass through the heat exchanger 3, thereby increasing the air flow passing through the heat exchanger 3 under the same operating function, helping to improve the heat exchange efficiency of the heat exchanger 3, and improving the air conditioning effect of the outdoor unit 100.

[0049] It can be understood that most production lines in the field of outdoor unit air conditioners adopt heat exchangers with a straight plate structure or an L-shaped structure, and the production and processing lines of heat exchangers with a straight plate structure or an L-shaped structure are very mature. For the heat exchanger 3 scheme in some embodiments of the present application, compared with the heat exchanger with a straight plate structure or an L-shaped structure, the structural deformation of the heat exchanger is small, and the original production and processing line can be used. Moreover, when this heat exchanger 3 replaces the original heat exchanger, the change in the internal layout position of the outdoor unit 100 is small, and the overall assembly production line of the outdoor unit 100 can also be used. Therefore, the cost of improving the structure of the outdoor unit 100 is not high.

[0050] According to the outdoor unit 100 of the embodiment of the present invention, the setting of the axial flow fan 2 is retained to ensure a large air volume under the same power. By setting the first bending section 311 and the second bending section 312 at both ends of the first heat exchange section 301 of the heat exchanger 3, the heat exchanger 3 is configured to be more in line with the streamline of the air flow field of the axial flow fan 2, reducing the resistance of air flow, improving the uniformity of the flow velocity distribution of the air passing through the first heat exchange section 301, the first bending section 311, and the second bending section 312, increasing the distribution angle range of the heat exchanger 3 with the same width in the air flow field, thereby improving the heat exchange efficiency of the heat exchanger 3 and the air conditioning effect of the outdoor unit 100. Moreover, after the wind resistance is reduced, it is beneficial to reduce noise.

[0051] In the solution of the present application, the structure of the first heat exchange section 301 can be a straight plate shape or a corrugated plate shape, etc.

[0052] Such as Figure 3 and Figure 4As shown, in some embodiments, the first bending section 311 is a straight section or an arc section.

[0053] When the first bending section 311 is a straight section, the processing difficulty is relatively low. Specifically, when the first bending section 311 is a straight section, the first bending section 311 and the first heat exchange section 301 are connected by an arc transition, thereby reducing the concentrated stress at the connection between the first bending section 311 and the first heat exchange section 301 and improving the overall structural stiffness.

[0054] When the first bending section 311 is an arc section, it helps the air flow direction in the air flow field to better match the shape of the first bending section 311, and more air can flow through the first bending section 311 substantially in the vertical direction, thereby further reducing the wind resistance.

[0055] Of course, in the solution of this application, when the first bending section 311 is an arc section, the entire first bending section 311 can have a single curvature. Or the first bending section 311 includes multiple sections, and the curvatures of adjacent two sections are different or the central positions of adjacent two sections are different. This can enrich the shape of the first bending section 311 and match and combine more shapes of the outdoor unit 100.

[0056] As Figure 3 and Figure 4 shown, in some embodiments, the second bending section 312 is a straight section or an arc section.

[0057] When the second bending section 312 is a straight section, the processing difficulty is relatively low. Specifically, when the second bending section 312 is a straight section, the second bending section 312 and the first heat exchange section 301 are connected by an arc transition, thereby reducing the concentrated stress at the connection between the second bending section 312 and the first heat exchange section 301 and improving the overall structural stiffness.

[0058] When the second bending section 312 is an arc section, it helps the air flow direction in the air flow field to better match the shape of the second bending section 312, and more air can flow through the second bending section 312 substantially in the vertical direction, thereby further reducing the wind resistance.

[0059] Of course, in the solution of this application, when the second bending section 312 is an arc section, the entire second bending section 312 can have a single curvature. Or the second bending section 312 includes multiple sections, and the curvatures of adjacent two sections are different or the central positions of adjacent two sections are different. This can enrich the shape of the second bending section 312 and match and combine more shapes of the outdoor unit 100.

[0060] As Figure 3 shown, optionally, the first bending section 311 can be a straight section and the second bending section 312 is an arc section.

[0061] As Figure 4As shown, optionally, the first bent section 311 may be a straight section, and the second bent section 312 may be a straight section.

[0062] In some examples not shown in the figures, optionally, the first bent section 311 may be an arc section, and the second bent section 312 may be an arc section.

[0063] In some examples not shown in the figures, optionally, the first bent section 311 may be an arc section, and the second bent section 312 may be a straight section.

[0064] As Figure 3 and Figure 4 shown, in some embodiments, the connection line between one end of the first bent section 311 connected to the first heat exchange section 301 and the end far from the first heat exchange section 301 is the first type line e, and the angle between the first type line e and the first heat exchange section 301 is β, and 90° ≤ β ≤ 155°. Thus, the angle coverage range of the first bent section 311 in the air flow field of the axial flow fan 2 can be ensured.

[0065] Optionally, β may be 91°, 95°, 100°, 105°, 111°, 120°, 125°, 130°, 140°, 150°, 155°, etc. Of course, β may also be other values between 90° and 155°, and will not be listed one by one here.

[0066] In some optional examples, the first bent section 311 is a straight section, the first type line e is the straight line where the straight section is located, and the angle between the first bent section 311 and the first heat exchange section 301 is β.

[0067] In some optional examples, the first bent section 311 is an arc section, the first type line e is the connection line between the two ends of the arc section, and the angle between this connection line and the first heat exchange section 301 is β.

[0068] As Figure 1 and Figure 2 shown, in some embodiments, the outdoor unit 100 further includes a middle partition 4. The middle partition 4 is arranged in the housing 1, and the middle partition 4 can divide the interior of the housing 1 into a first chamber 121 and a second chamber 122. The axial flow fan 2 is located in the first chamber 121, and the compressor 5 of the outdoor unit 100 is installed in the second chamber 122. That is, the first chamber 121 is a heat exchange chamber, and the second chamber 122 is a compression chamber, so that the parts inside the second chamber 122 will not interfere with the flow field of the first chamber 121.

[0069] Wherein, one end of the first bent section 311 far from the first heat exchange section 301 is connected to the end of the middle partition 4. In this way, the middle partition 4 is located at the edge of the first chamber 121, and the air flow inhaled from the first bent section 31 is guided by the middle partition 4, which is beneficial to the convergence of the air flow towards the axial flow fan 2.

[0070] Specifically, the part of the middle partition plate 4 adjacent to the heat exchanger 3 is an extension plate 41. In the direction towards the first air inlet 111, the extension plate 41 extends in a direction away from the axis N of the axial flow fan 2, and the first bending section 311 is connected to the extension plate 41. That is to say, the airflow flowing through the first bending section 311 is guided by the extension plate 41 towards the diameter d2 range of the axial flow fan 2 more and more as it is inhaled. On the one hand, the airflow path gradually becomes narrower, achieving a pressurizing effect. On the other hand, it is easier for the airflow to converge to the axial flow fan 2, reducing the generation of eddy currents here and lowering the internal loss of the airflow power. With such a setting, it is equivalent to moving a corner of the second chamber 122 to the first chamber 121 here, which has little impact on the overall layout of the outdoor unit 100 and does not increase excessive dimensions.

[0071] Specifically, after the extension plate 41 is set in this way, in the direction towards each other, both the first bending section 311 and the extension plate 41 extend in a direction away from the axis N of the axial flow fan 2. In this way, in the corner surrounded by the first bending section 311 and the extension plate 41 in the first chamber 121, it is not easy to generate dead zones, and the airflow flows more smoothly.

[0072] Optionally, the extension plate 41 can be a straight plate or an arc-shaped plate, and there is no limitation here.

[0073] As Figure 2 shown, in some embodiments, the first bending section 311 is a straight section, and the included angle between the first bending section 311 and the extension plate 41 is γ, and γ ≥ 90°. In this way, while reducing the processing difficulty of the first bending section 311, using the guiding effect of the extension plate 41 to affect the airflow direction at this place in the air flow field, guiding more airflow to flow vertically through the first bending section 311, which is beneficial to reducing the air flow resistance and reducing the noise.

[0074] Optionally, γ takes the value of 90°, that is, the first bending section 311 is perpendicularly connected to the extension plate 41. In this way, the airflow in the area surrounded by the two is less likely to generate eddy currents and is easily guided into the diameter d2 range of the axial flow fan 2.

[0075] As Figure 2 shown, optionally, γ can be 91°, 95°, 100°, 105°, 111°, 120°, 125°, 130°, 140°, 150°, 155°, 160°, 170°, etc. Of course, γ can also be other values greater than 90°, and they are not listed one by one here. Preferably, γ can be arbitrarily selected within the range of 90° - 155°.

[0076] As Figure 2 shown, in some embodiments, the outdoor unit 100 is in the direction of the axis N of the axial flow fan 2 (such as Figure 1The dimension in the front-rear direction (as shown) is the thickness. The thickness of the first chamber 121 is A, and the thickness of the second chamber 122 is B, where A is greater than B. In this way, in the case of limited space, more space is given to the air intake side of the axial flow fan 2, allowing more air flow to pass through the heat exchanger 3, thereby improving the heat exchange efficiency. Moreover, as Figure 2 shown, by reducing the thickness B of the second chamber 122, the front side of the second chamber 122 is avoided. Here, the air flow is guided by the front wall of the second chamber 122 and flows leftward to the first bending section 311. As a result, the air flow on the front side of the second chamber 122 can flow to the first bending section 311 more and more smoothly, reducing the suction consumption of the air flow, thereby increasing the air volume while reducing the energy consumption.

[0077] In some embodiments, the housing 1 includes a chassis 15 and a top cover. The top cover is disposed opposite above the chassis 15. The housing 1 further includes side plates 13. The side plates 13 are connected between the top cover and the chassis 15. The chassis 15, the top cover and the side plates 13 enclose the inner cavity of the housing 1.

[0078] Specifically, as Figure 1 shown, the side plate 13 includes a first side plate 131, a second side plate 132, a third side plate 133 and a fourth side plate 134. The first side plate 131 is located on the air outlet side of the axial flow fan 2 (such as the rear side as Figure 1 shown), and the second side plate 132 and the third side plate 133 are connected to opposite ends of the first side plate 131 (such as the left and right ends as Figure 1 shown). The fourth side plate 134 is disposed opposite to the first side plate 131 and is connected to the third side plate 133. Among them, both ends of the middle partition plate 4 are connected to the first side plate 131 and the fourth side plate 134. The first chamber 121 is enclosed between the middle partition plate 4, the second side plate 132 and a part of the first side plate 131. The second chamber 122 is enclosed between the middle partition plate 4, the third side plate 133, the fourth side plate 134 and a part of the first side plate 131.

[0079] On the side opposite to the first side plate 131, a first air inlet 111 is provided between the second side plate 132 and the fourth side plate 134. The first bending section 311, the first heat exchange section 301, and the second bending section 312 are successively blocked at the first air inlet 111. By setting the first air inlet 111 in this way, it is ensured that a large area on the front side of the outdoor unit 100 can intake air, increasing the air intake volume of the outdoor unit 100 and ensuring the heat exchange efficiency of the outdoor unit 100. By setting the heat exchanger 3 in this way, the sealing property of the first chamber 121 from the external visual perspective can be ensured, preventing sundries from falling into the first chamber 121.

[0080] As Figure 1 shown, for example, an air outlet grille 113 is further provided at the position corresponding to the air outlet 112 of the first side plate 131, thereby improving the protection here, preventing sundries from flying into the axial flow fan 2 after falling in, and improving the cleanliness and safety.

[0081] As Figure 1 shown, in some embodiments, the heat exchanger 3 includes a side plate 33 provided at the end of the first bent section 311, and the side plate 33 is connected to the extension plate 41, which can improve the connection reliability between the heat exchanger 3 and the extension plate 41 and avoid the formation of large leakage gaps due to looseness here under the long-term air passing environment.

[0082] Here, the side plate 33 is a plate body at the edge of the heat exchanger 3 for fixing the heat exchange tubes, and the side plate 33 is an important component structure of the heat exchanger 3. Specifically, the side plate 33 and the extension plate 41 can be independent plates. That is to say, after the heat exchanger 3 is processed, it is installed on the extension plate 41 of the middle partition plate 4, which can reduce the assembly difficulty.

[0083] Of course, the solution of the present application is not limited to this. For example, the side plate 33 and the extension plate 41 can be an integral plate. That is to say, the middle partition plate 4 is vacant at the extension plate 41. When the outdoor unit 100 is assembled with the heat exchanger 3, the side plate 33 of the heat exchanger 3 acts as the extension plate 41. Such a setting not only saves the plate parts, but also after using the side plate 33 as the extension plate 41, the side plate 33 itself is very stable on the heat exchanger 3. Therefore, the probability of the extension plate 41 being separated from the heat exchange tubes is almost zero, and the possibility of forming an air leakage gap is almost zero. Therefore, the structural stability and reliability here can still be guaranteed after long-term use.

[0084] Even the middle partition plate 4 can be saved. When the outdoor unit 100 is assembled with the heat exchanger 3, the side plate 33 of the heat exchanger 3 acts as the entire middle partition plate 4. At this time, the rear end of the side plate 33 needs to be connected to the first side plate 131, and the side plate 33 is used to form a partition of the inner cavity of the housing 1. Such a setting saves the number of plate bodies, and the structural integrity between the middle partition plate 4 and the heat exchanger 3 is strong, making the overall structural strength of the outdoor unit 100 greater.

[0085] As Figures 1 - 4 shown, in some embodiments, the heat exchanger 3 further includes a second heat exchange section 302, and the second heat exchange section 302 is connected to the end of the second bent section 312 far from the first heat exchange section 301, and the second heat exchange section 302 is arranged adjacent to the side wall of the housing 1. In this way, the air flow flowing between the second heat exchange section 302 and the side wall of the housing 1 can flow through the second heat exchange section 302 to the axial flow fan 2, expanding the heat exchange area between the air flow and the heat exchanger 3 and improving the heat exchange efficiency of the outdoor unit 100.

[0086] Specifically, the second side plate 132 of the side plate 13 of the housing 1 is arranged adjacent to the second heat exchange section 302, and a second air inlet 135 can be provided on the second side plate 132, so that the air flow on the left side of the housing 1 can be more inhaled into the housing 1 through the second air inlet 135, increasing the air flow inhalation amount.

[0087] As Figure 3 and Figure 4As shown, in some embodiments, the included angle between the first heat exchange section 301 and the second heat exchange section 302 is α, and α≥90°. In some preferred examples, the included angle α between the first heat exchange section 301 and the second heat exchange section 302 is 90°. Optionally, α can be 91°, 95°, 100°, 105°, 111°, 120°, 125°, 130°, 140°, 150°, 155°, 160°, 170°, etc. Of course, α can also be other values greater than 90°, which are not listed one by one here. The first heat exchange section 301 and the second heat exchange section 302 are connected by a straight section or an arc section, which can reduce the stress concentration area, reduce the resistance at the same time, and improve the uniformity of the air flow velocity in the air flow field.

[0088] It should be emphasized that, as Figure 5 shown, in the related art, near the middle partition of the heat exchanger, since the direction of the heat exchanger is not parallel to the direction of the flow field, the air flow resistance here becomes larger, affecting the air flow, resulting in less air flow under the same area of the heat exchanger here, and the overall heat exchange of the heat exchanger is poor. As Figure 6 shown, in the present application, by bending the heat exchanger 3 at the middle partition 4 by an angle to form a first bent section 311, the direction of the heat exchanger 3 here is made as parallel as possible to the direction of the flow field, so that the uniformity of the air velocity field increases and the resistance decreases. Under the same noise, the air volume can be increased by about 100 cubic meters. The heat exchange here has an increased air flow under the same area as before, and the overall heat exchange of the heat exchanger 3 is more uniform.

[0089] Next, specific embodiments will be described according to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 .

[0090] As Figures 1 - 4As shown in the figure, the outdoor unit 100 includes a first chamber 121 and a second chamber 122 separated by a middle partition plate 4. The first chamber 121 is a heat exchange chamber, and the second chamber 122 is a compression chamber. A heat exchanger 3 and an axial flow fan 2 are provided in the heat exchange chamber, and a compressor 5 is provided in the compression chamber. The first chamber 121 is formed by enclosing between the middle partition plate 4, the second side plate 132, and a part of the first side plate 131. The second chamber 122 is formed by enclosing between the middle partition plate 4, the third side plate 133, the fourth side plate 134, and a part of the first side plate 131. Among them, an air outlet 112 is provided on the first side plate 131 corresponding to the first chamber 121, and a first air inlet 111 is formed between the second side plate 132 and the fourth side plate 134. The axial flow fan 2 sucks air from the first air inlet 111, and the air within the diameter d2 of the axial flow fan 2 blows out substantially along the axial direction of the axial flow fan 2; while the air streamline N1 outside the diameter d2 of the axial flow fan 2 enters the range within the diameter d2 of the axial flow fan 2 from outside the diameter d2 of the axial flow fan 2, and then blows out along the axial direction of the axial flow fan 2.

[0091] As Figure 2 shown, in the front-back direction, the size of the first chamber 121 is A, and the size of the second chamber 122 is B, and A is greater than B.

[0092] The axial flow fan 2 includes a motor bracket 21, a motor 22, and a fan blade 23. The streamline N2 of the air flow field within the diameter d2 of the axial flow fan 2 and the streamline N1 of the air flow field outside the diameter d2 of the axial flow fan 2 both bypass the motor bracket 21, the motor 22, and the fan blade 23.

[0093] The heat exchanger 3 includes a first heat exchange section 301, a first bending section 311, a second bending section 312, and a second heat exchange section 302. The first heat exchange section 301 is a straight section and extends along the left-right direction; the second heat exchange section 302 is a straight section and extends along the front-back direction.

[0094] Example 1:

[0095] The heat exchanger 3 includes a first heat exchange section 301, a first bending section 311, a second bending section 312, and a second heat exchange section 302. Among them, the second heat exchange section 302 is an arc section, the first bending section 311 is a straight section, the first bending section 311 is connected to the extension plate 41 of the middle partition plate 4 through a side plate 33, and the included angle γ between the first bending section 311 and the extension plate 41 is 90°. Outside the diameter d of the axial flow fan 2, the air flow streamline N1 extends from a point outside the diameter d2 of the axial flow fan 2 to within the diameter d2 of the axial flow fan 2, and part of the streamline N1 is perpendicular to the first bending section 311. After the streamline N1 of the flow field turns, it extends around the obstacle from a direction parallel to the axis N of the axial flow fan 2.

[0096] Example 2:

[0097] The heat exchanger 3 includes a first heat exchange section 301, a first bending section 311, a second bending section 312 and a second heat exchange section 302. Among them, the second heat exchange section 302 is a straight section, the first bending section 311 is a straight section, and the first bending section 311 is connected to the extension plate 41 of the middle partition plate 4 through a side plate 33. The included angle γ between the first bending section 311 and the extension plate 41 is 90°. Outside the diameter d2 range of the axial flow fan 2, the streamline N1 of the air flow field extends from a point outside the diameter d2 range of the axial flow fan 2 to within the diameter d2 range of the axial flow fan 2. Part of the streamline N1 is perpendicular to the first bending section 311, and after the streamline N1 of the flow field turns, it extends around the obstacle from a direction parallel to the axis N of the axial flow fan 2.

[0098] The following table shows the comparison of the capabilities and powers of the outdoor unit in the related art and the outdoor unit 100 of the present application in different modes:

[0099]

[0100] After testing and comparison, it is confirmed that the outdoor unit 100 proposed by the present invention is superior to the outdoor unit in the related art in terms of free cooling, 43-degree cooling, free heating, and low-temperature heating. Especially in low-temperature heating, it is improved by 93W, and in 43-degree cooling, the power consumption is reduced by 23W, and the heat exchange effect is obvious.

[0101] Other configurations and operations of the outdoor unit 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0102] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0103] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An outdoor unit, characterized in that, Comprising: A housing having a first air inlet and an air outlet provided on opposite sides thereof. An axial flow fan installed in the housing, with the axial ends of the axial flow fan facing the first air inlet and the air outlet respectively. A heat exchanger including a first heat exchange section, a first bent section and a second bent section, the first heat exchange section being located on the side of the axial flow fan facing the first air inlet, and the first bent section and the second bent section being connected to opposite ends of the first heat exchange section. Wherein, in the direction away from the first heat exchange section, both the first bent section and the second bent section are bent towards the air outlet, and the width of the heat exchanger from the first bent section to the second bent section is greater than the diameter of the axial flow fan.

2. The outdoor unit according to claim 1, characterized in that, Further comprising: A middle partition provided in the housing to divide the housing into a first chamber and a second chamber, the axial flow fan being located in the first chamber, and the compressor of the outdoor unit being installed in the second chamber. One end of the first bent section away from the first heat exchange section is connected to the end of the middle partition.

3. The outdoor unit according to claim 2, characterized in that: The part of the middle partition adjacent to the heat exchanger is an extension plate. In the direction towards each other, both the first bent section and the extension plate extend in a direction away from the axis of the axial flow fan.

4. The outdoor unit according to claim 3, characterized in that, The first bent section is a straight section, and the angle between the first bent section and the extension plate is γ, and γ≥90°.

5. The outdoor unit according to claim 2, characterized in that, The dimension of the outdoor unit in the axial direction of the axial flow fan is the thickness; the thickness of the first chamber is greater than the thickness of the second chamber.

6. The outdoor unit according to claim 5, characterized in that, The housing includes: A chassis. A top cover oppositely disposed above the chassis. Side plates connected between the top cover and the chassis, the side plates including a first side plate, a second side plate, a third side plate and a fourth side plate, the first side plate being located on the air outlet side of the axial flow fan, the second side plate and the third side plate connecting opposite ends of the first side plate, and the fourth side plate being oppositely disposed to the first side plate and connecting the third side plate. Wherein, both ends of the middle partition are connected to the first side plate and the fourth side plate, and the first chamber is enclosed by the middle partition, the second side plate and a part of the first side plate, and the second chamber is enclosed by the middle partition, the third side plate, the fourth side plate and a part of the first side plate. On the side opposite to the first side plate, the first air inlet is defined between the second side plate and the fourth side plate, and the first bent section, the first heat exchange section and the second bent section are sequentially blocked at the first air inlet.

7. The outdoor unit according to claim 6, characterized in that, The heat exchanger includes a side plate provided at the end of the first bent section, the side plate connecting the middle partition, and the side plate and the middle partition are either independent plates or integral plates.

8. The outdoor unit according to claim 1, characterized in that, The first bent section is a straight section or an arc section, and the second bent section is a straight section or an arc section.

9. The outdoor unit according to claim 1, characterized in that, The connecting line between the end of the first bent section connected to the first heat exchange section and the end away from the first heat exchange section is the first profile line, and the included angle between the first profile line and the first heat exchange section is β, and 90° ≤ β ≤ 155° is satisfied.

10. The outdoor unit according to any one of claims 1-8, characterized in that, The heat exchanger further includes: a second heat exchange section, the second heat exchange section is connected to the end of the second bent section away from the first heat exchange section, and the second heat exchange section is disposed adjacent to the side wall of the housing.

11. The outdoor unit according to claim 10, characterized in that, The included angle between the first heat exchange section and the second heat exchange section is α, and α ≥ 90° is satisfied.

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