Cross-flow fan and air conditioning equipment

Abstract

The present invention relates to a cross-flow fan and an air conditioning device. Among them, the cross-flow fan includes a volute formed by bending a sheet metal part. The volute includes a first section, a tail section, and at least two intermediate sections located between the first section and the tail section. The angles formed by the first section and the adjacent intermediate section, the tail section and the adjacent intermediate section, and two adjacent intermediate sections are all greater than zero degrees. The volute of the cross-flow fan is formed by bending the sheet metal part at least three times. Sheet metal bending is simpler and less costly than the die-casting processing technology. Moreover, sheet metal bending has strong plasticity and easy structural adjustment, which improves the diversity of the overall structural dimensions of the cross-flow fan and can adapt to different application environments.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and particularly to a cross-flow fan and an air conditioning device. Background Art

[0002] Cross-flow fans are widely used in household appliances such as wall-mounted air conditioners and cabinet air conditioners due to advantages such as uniform air supply, low energy consumption, and compact structure. And because of its wide air supply range and the ability to better balance the cabinet temperature, it has begun to be applied in the refrigeration industry. In some related technologies, the volute of the cross-flow fan uses injection-molded parts made by mold opening, which has problems such as high cost and long processing cycle. Summary of the Invention

[0003] Some embodiments of the present invention provide a cross-flow fan and an air conditioning device for alleviating the problem of long processing cycle.

[0004] In one aspect of the present invention, a cross-flow fan is provided, including a volute formed by bending a sheet metal part. The volute includes a first section, a tail section, and at least two intermediate sections located between the first section and the tail section. The angles formed by the first section and the adjacent intermediate section, the tail section and the adjacent intermediate section, and two adjacent intermediate sections are all greater than zero degrees.

[0005] In some embodiments, the cross-flow fan further includes a volute tongue and an impeller. The volute tongue includes a first part and a second part. The first part cooperates with the volute to enclose the impeller, and an air outlet is formed between the second part and the volute.

[0006] In some embodiments, ∠α = ∠β, where ∠α is the angle formed by the connecting line OA and the connecting line OC, ∠β is the angle formed by the connecting line OB and the connecting line OC, O is the center point of the radial section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first part closest to the center point O, and C is the point on the extension line of the second part closest to the center point O.

[0007] In some embodiments, the connecting line OA is perpendicular to the axial direction of the impeller.

[0008] In some embodiments, the point C is also a point on the impeller, and the extension line of the second part is tangent to the radial section of the impeller at the point C.

[0009] In some embodiments, the first section is located at the top of the volute and at the position of the air inlet of the cross-flow fan, the tail section is located at the side of the volute and at the position of the air outlet of the cross-flow fan. The angle formed by the tangent line passing through the highest point of the first section and the tangent line passing through the outermost point of the tail section is ∠γ, and ∠γ = 90° ± 5°.

[0010] In some embodiments, where n is the number of bends of the volute, n≥3, and ∠d i is the angle at the i-th bend, and the value range of i is from 1 to n.

[0011] In some embodiments, ∠d i has a value range of (90°, 180°).

[0012] In some embodiments, 40°≤∠θ≤60°, where ∠θ is the angle between the connecting line GD and the horizontal line L1, G is the leading end point on the cross-section of the volute along the radial direction of the cross-flow fan, and D is the trailing end point on the cross-section of the volute along the radial direction of the cross-flow fan.

[0013] In some embodiments, 20°≤∠ε≤40°, where ∠ε is the angle between the connecting line EF and the horizontal line L2, E is the leading end point on the cross-section of the scroll tongue along the radial direction of the cross-flow fan, and F is the trailing end point on the cross-section of the scroll tongue along the radial direction of the cross-flow fan.

[0014] In some embodiments, the cross-flow fan further includes at least two air guide plates, the at least two air guide plates are spaced apart and arranged at the air outlet, and each air guide plate is respectively connected to the second part.

[0015] In some embodiments, the cross-flow fan further includes a first side plate and a second side plate made of sheet metal parts. The first side plate is connected to the first side of the volute and the scroll tongue, and the second side plate is connected to the second side of the volute and the scroll tongue. The second side and the first side are opposite sides.

[0016] In some embodiments, the impeller includes a leading end section, a trailing end section, and at least one intermediate section connected in series between the leading end section and the trailing end section.

[0017] In some embodiments, the cross-flow fan further includes a scroll tongue formed by bending a sheet metal part.

[0018] In one aspect of the present invention, there is provided an air conditioning device including the above-mentioned cross-flow fan.

[0019] In some embodiments, the air conditioning device is an air conditioner, a fresh air system or a cold cabinet.

[0020] Based on the above technical solutions, the present invention has at least the following beneficial effects:

[0021] In some embodiments, the volute of the cross-flow fan is formed by bending a sheet metal part at least three times. Sheet metal bending is simpler and less costly than die-machining processes. Moreover, sheet metal bending has strong plasticity and easy structural adjustment, which improves the diversity of the overall structural dimensions of the cross-flow fan and enables it to adapt to different application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 is a schematic diagram of a cross-flow fan provided according to some embodiments of the present invention;

[0024] Figure 2 is a schematic diagram of a radial cross-section of a cross-flow fan provided according to some embodiments of the present invention;

[0025] Figure 3 is a schematic diagram of a radial cross-section after the volute and the volute tongue cooperate to form a space enclosing the impeller according to some embodiments of the present invention;

[0026] Figure 4 is a schematic diagram of an impeller provided according to some embodiments of the present invention.

[0027] The reference numerals in the drawings are explained as follows:

[0028] 1 - volute; 11 - first section; 12 - tail section; 13 - intermediate section; 2 - volute tongue; 21 - first part; 22 - second part; 3 - impeller; 31 - first end section; 32 - intermediate section; 33 - tail end section; 34 - first shaft; 35 - second shaft; 4 - air guide plate; 5 - first side plate; 51 - front side; 52 - rear side; 6 - second side plate; 7 - air outlet; 8 - air inlet; 9 - bearing.

[0029] It should be understood that the dimensions of the various parts shown in the drawings are not drawn according to actual proportional relationships. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the compositions of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0031] The "first", "second", and similar terms used in the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "comprising" or "including" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices and have an intermediate device.

[0033] All terms used in the present invention (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0034] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0035] Reference Figure 1 and Figure 2 In some embodiments, the cross-flow fan includes a volute 1 formed by bending a sheet metal part. The volute 1 includes a first section 11, a tail section 12, and at least two intermediate sections 13 located between the first section 11 and the tail section 12. The first section 11, the at least two intermediate sections 13, and the tail section 12 are connected in sequence.

[0036] The angle formed by the first section 11 and the adjacent middle section 13 is greater than zero degrees. The angle formed by the tail section 12 and the adjacent middle section 13 is greater than zero degrees. And the angle formed by two adjacent middle sections 13 is greater than zero degrees.

[0037] In some related technologies, since the volute is manufactured by using a mold, it is necessary to pre-manufacture the mold and open the mold. However, the mold opening cycle is long and the cost is high. Moreover, the overall structure of the cross-flow fan formed by the volute is limited and cannot be applied to different application environments.

[0038] Based on this, the volute 1 of the cross-flow fan provided in the embodiments of the present disclosure is formed by bending a sheet metal part. The sheet metal bending is simpler and less costly than the mold opening processing technology. Moreover, the sheet metal bending has strong plasticity and the structure is easy to adjust, which improves the diversity of the overall structure size of the cross-flow fan and can adapt to different application environments.

[0039] Since the volute 1 includes a first section 11, a tail section 12, and at least two middle sections 13 located between the first section 11 and the tail section 12, the volute 1 includes at least three bending points, that is, the number of bends n of the volute is ≥3, which can improve the air supply uniformity. Of course, the profile line of the volute 1 after multiple bends is smoother.

[0040] The first section 11 of the volute 1 is located at the air inlet 8, and the tail section 12 is located at the air outlet 7.

[0041] In some embodiments, the cross-flow fan further includes a volute tongue 2 and an impeller 3. The volute tongue 2 includes a first part 21 and a second part 22. The first part 21 cooperates with the volute 1 to envelope the impeller 3. An air inlet 8 is formed between the end of the first part 21 far from the second part 22 and the volute 1. An air outlet 7 of the cross-flow fan is formed between the second part 22 and the volute 1.

[0042] The first part 21 cooperates with the volute 1 to envelope the impeller 3, and an air inlet 8 of the cross-flow fan is formed between the first part 21 and the volute 1. An air outlet 7 of the cross-flow fan is formed between the second part 22 and the volute 1. The volute tongue 2 and the volute 1 form an envelope curve of the impeller 3, which improves the air supply uniformity.

[0043] In some embodiments, the cross-flow fan further includes a volute tongue 2 formed by bending a sheet metal part.

[0044] The volute tongue 2 is formed by bending a sheet metal part. The sheet metal bending is simpler and less costly than the mold opening processing technology. Moreover, the sheet metal bending has strong plasticity and the structure is easy to adjust, which improves the diversity of the overall structure size of the cross-flow fan and can adapt to different application environments.

[0045] The first part 21 of the volute tongue 2 includes at least two bending points, and the first part 21 and the second part 22 are also formed by bending.

[0046] ReferenceFigure 2 and Figure 3 The volute 1 envelopes the upper part of the impeller 3 and envelopes the side part of the impeller 3 away from the air inlet 8. The first part 21 envelopes the lower part of the impeller 3. An air outlet 7 is formed between the second part 22 and the volute 1. One end of the first part 21 is located at the air inlet 8, the other end of the first part 21 is connected to the second part 22, and the second part 22 is inclined downward relative to the first part 21 and away from the volute 1. Along the flow direction of the air flow, the opening of the air outlet 7 gradually increases.

[0047] For the references of the "upper part", "lower part", "top", "bottom" and "side part" of the volute 1 in the embodiments of the present disclosure: the axis of the cross-flow fan is substantially parallel to the horizontal plane, the air outlet of the cross-flow fan faces downward, and the corresponding orientation of the cross-flow fan in this state.

[0048] Reference Figure 2 , in some embodiments, ∠α = ∠β, where ∠α is the angle formed by the connecting line OA and the connecting line OC, ∠β is the angle formed by the connecting line OB and the connecting line OC, O is the center point of the radial section of the impeller 3, A is the point on the volute 1 closest to the center point O, B is the point on the first part 21 closest to the center point O, and C is the point on the extension line of the second part 22 closest to the center point O.

[0049] After the volute 1, the volute tongue 2 and the impeller 3 are assembled, ∠AOB is the range angle of the air inlet 8, and ∠α = ∠β, which can minimize the air suction resistance, so that the cross-flow fan has uniform air supply and stable operation.

[0050] In some embodiments, the connecting line OA is perpendicular to the axis of the impeller 3.

[0051] The point A on the volute 1 closest to the center point O is located directly above the impeller 3, and the connecting line OA is perpendicular to the axis of the impeller 3, which can meet the installation requirements and is conducive to uniform air supply.

[0052] In some embodiments, the point C is also a point on the impeller 3, and the extension line of the second part 22 is tangent to the radial section of the impeller 3 at the point C.

[0053] Reference Figure 3 , in some embodiments, the first section 11 is located at the top of the volute 1 and at the position of the air inlet 8 of the cross-flow fan, the tail section 12 is located at the side part of the volute 1 and at the position of the air outlet 7 of the cross-flow fan, the angle formed by the tangent line passing through the highest point of the first section 11 and the tangent line passing through the outermost point of the tail section 12 is ∠γ, and ∠γ = 90° ± 5°.

[0054] The first section 11 is located at the top of the volute 1, and the highest point of the first section 11 corresponds to the top vertex of the first section 11. The tail section 12 is located at the side part of the volute 1, and the outermost point of the tail section 12 corresponds to the point on the tail section 12 farthest from the volute tongue 2.

[0055] When the cross-flow fan is installed in the housing, it is generally located at the angle between the top plate and the back plate of the housing. The top of the volute 1 is close to the top plate of the housing, and the side of the volute 1 is close to the back plate of the housing. The angle ∠γ formed by the tangent line passing through the highest point of the first section 11 and the tangent line passing through the outermost point of the tail section 12 is the installation angle, and ∠γ = 90° ± 5°. This installation angle can increase the usable space inside the housing, and the installation angle designed to be 90° ± 5° here can make the volute 1 in close contact with the housing, making the whole machine more stable during operation; and it can avoid gaps in contact, prevent air leakage during use, generate noise, and reduce the problem of product performance.

[0056] In some embodiments, on the cross-section made by the volute 1 along the radial direction of the cross-flow fan, along the direction from the first section 11 to the tail section 12, the distances between each intermediate section 13 and the impeller 3 increase in sequence.

[0057] In some embodiments, both the first section 11 and the tail section 12 are flat sections. On the cross-section made by the volute 1 along the radial direction of the cross-flow fan, the extension line of the first section 11 is collinear with the tangent line passing through the highest point of the first section 11, and the extension line of the tail section 12 is collinear with the tangent line passing through the outermost point of the tail section 12. Therefore, the angle formed by the extension line of the first section 11 and the extension line of the tail section 12 is also ∠γ, and ∠γ = 90° ± 5°.

[0058] Optionally, the first section 11 is a horizontal section and the tail section 12 is a vertical section.

[0059] In some embodiments, where n is the number of bends of the volute 1, n ≥ 3, and ∠d i is the angle at the i-th bend, and the value range of i is from 1 to n.

[0060] The number of bends of the volute 1 is greater than or equal to three, and the reasonable value of the angle at each bend can make the profile line of the volute 1 more circular arc, which is beneficial to uniform air outlet.

[0061] In some embodiments, the value range of ∠d i is (90°, 180°). That is to say, the angles formed by the first section 11 of the volute 1 and the adjacent intermediate section 13, the tail section 12 and the adjacent intermediate section 13, and the two adjacent intermediate sections 13 all have a value range of (90°, 180°).

[0062] The value range of ∠d i is (90°, 180°), which can make the profile line of the volute 1 more circular arc and is beneficial to uniform air outlet.

[0063] Reference Figure 3, in some embodiments, 40° ≤ ∠θ ≤ 60°, where ∠θ is the angle between the connecting line GD and the horizontal line L1, G is the starting point on the cross-section of the volute 1 made along the radial direction of the cross-flow fan, and D is the ending point on the cross-section of the volute 1 made along the radial direction of the cross-flow fan.

[0064] The starting point G of the volute 1 is the starting point of the first section 11 located at the air inlet 8, and the ending point D of the volute 1 is the ending point of the second section 12 located at the air outlet 7.

[0065] ∠θ is related to the range angle of the air inlet 8. Theoretically, the larger the value of ∠θ, the better. However, due to the limitation of the right-angle installation edge in the housing, the angle at this place cannot be infinitely enlarged and there is a certain upper limit value. And if ∠θ is too small, the range angle of the air inlet 8 will become smaller, affecting the performance of the whole machine. Therefore, 40° ≤ ∠θ ≤ 60°, which can not only make reasonable use of the installation space, but also avoid a large reduction in the air volume, without affecting the air volume of the cross-flow fan and improving the performance of the whole machine. Generally, when ∠θ < 40°, the air volume will be greatly reduced, resulting in failure to achieve the expected effect.

[0066] In some embodiments, 20° ≤ ∠ε ≤ 40°, where ∠ε is the angle between the connecting line EF and the horizontal line L2, E is the starting point on the cross-section of the volute tongue 2 made along the radial direction of the cross-flow fan, and F is the ending point on the cross-section of the volute tongue 2 made along the radial direction of the cross-flow fan.

[0067] The starting point E of the volute tongue 2 is the starting point of the first part 21 located at the air inlet 8, and the ending point F of the volute tongue 2 is the ending point of the second part 22 located at the air outlet 7.

[0068] ∠ε is related to the range angle of the air inlet 8. Theoretically, the larger the value of ∠ε, the better. However, due to the limitation of the right-angle installation edge in the housing, the angle at this place cannot be infinitely enlarged and there is a certain upper limit value. And if ∠ε is too small, the range angle of the air inlet 8 will become smaller, affecting the performance of the whole machine. Therefore, 20° ≤ ∠ε ≤ 40°, which can not only make reasonable use of the installation space, but also avoid a large reduction in the air volume, without affecting the air volume of the cross-flow fan and improving the performance of the whole machine. And generally, when ∠ε < 20°, the air volume will be greatly reduced, resulting in failure to achieve the expected effect.

[0069] Reference Figure 1 , in some embodiments, the cross-flow fan further includes at least two air guide plates 4, and the at least two air guide plates 4 are arranged at intervals along the axial direction of the cross-flow fan at the air outlet 7, and each air guide plate 4 is respectively connected to the second part 22. Optionally, each air guide plate 4 is also respectively in contact with the volute 1.

[0070] The at least two air guide plates 4 are arranged at intervals along the axial direction of the cross-flow fan at the air outlet 7, which can guide the air flow flowing out through the air outlet 7 and provide the cooling effect and the uniformity of the cooling temperature.

[0071] Reference Figure 1 In some embodiments, the cross-flow fan further includes a first side plate 5 and a second side plate 6 made of sheet metal. The first side plate 5 is connected to the first side of the volute 1 and the scroll tongue 2, and the second side plate 6 is connected to the second side of the volute 1 and the scroll tongue 2. The second side and the first side are opposite sides.

[0072] The profile line of the front side 51 of the first side plate 5 matches the profile line of the scroll tongue 2. That is to say, the profile line of the front side 51 of the first side plate 5 is also similar to the profile line of the radial cross-section of the scroll tongue 2. The profile line of the front side 5 of the first side plate 5 also includes a first part and a second part. The profile line of the rear side 52 of the first side plate 5 matches the profile line of the volute 1. That is to say, the profile line of the rear side 52 of the first side plate 5 is also similar to the profile line of the radial cross-section of the volute 1. The profile line of the rear side 52 of the first side plate 5 also includes a first section, a tail section, and at least two intermediate sections located between the first section and the tail section. Here, the rear side 52 of the first side plate 5 envelopes the front side 51. After the cross-flow fan is installed, the rear side 52 of the first side plate 5 is close to the back plate of the housing.

[0073] The first side plate 5 and the second side plate 6 have the same structure and are symmetrically arranged. The first side plate 5 and the second side plate 6 have the functions of supporting the impeller 3 and preventing cold leakage.

[0074] Reference Figure 4 In some embodiments, the impeller 3 includes a head end section 31, a tail end section 33, and at least one intermediate section 32 connected in series between the head end section 31 and the tail end section 33.

[0075] The number of the intermediate sections 32 can be set to one, two, or more than three according to needs. Increasing or decreasing the number of the intermediate sections 32 can adjust the air delivery volume of the cross-flow fan.

[0076] The head end section 31, at least one intermediate section 32, and the tail end section 33 are connected in series along the axial direction of the cross-flow fan in sequence.

[0077] Optionally, there is a radial rotation assembly angle between the intermediate sections 32, and the axes of the intermediate sections 32 are collinear.

[0078] In some embodiments, the cross-flow fan further includes a first shaft 34 and a second shaft 35. The length of the first shaft 34 is greater than the length of the second shaft 35, and the shaft diameter of the first shaft 34 is smaller than the shaft diameter of the second shaft 35. The first shaft 34 is arranged on the tail end section 33, and the second shaft 35 is arranged on the head end section 31.

[0079] In some embodiments, the cross-flow fan may include two or more impellers 3, and the impellers 3 can be connected in series.

[0080] In the actual design process, the overall structure with different structural dimensions can be adapted by simply connecting multiple impellers 3 in series or changing the length dimensions of the volute and volute tongue.

[0081] In some embodiments, the second shaft 35 is provided with a through hole. Among two adjacent impellers 3, the first shaft 34 on the tail end section 33 of one impeller 3 can be inserted into the through hole of the second shaft 35 on the head end section 31 of the other impeller 3. The impellers 3 are used in series by the cooperation of the first shaft 34 of the tail end section 33 and the second shaft 35 of the head end section 31, so as to adapt to different overall dimensions of the machine.

[0082] Optionally, considering that the excessive length after connecting multiple impellers 3 in series may affect stability, the length after connecting multiple impellers 3 in series is not greater than 700 mm.

[0083] In some embodiments, the cross-flow fan further includes a locking member. When the first shaft 34 on the tail end section 33 of one impeller 3 is inserted into the through hole of the second shaft 35 on the head end section 31 of the other impeller 3, the first shaft 34 of this one impeller and the second shaft 35 of the other impeller 3 are locked by the locking member.

[0084] In some embodiments, the cross-flow fan further includes a bearing 9. The bearing 9 is arranged on the first side plate 5. The first shaft 34 on the tail end section 33 of the impeller 3 is connected to the bearing 9 in a matching manner, which can enable the impeller 3 to rotate smoothly. Optionally, the second shaft 35 on the head end section 31 of the impeller 3 is riveted to the second side plate 5.

[0085] In some embodiments, the volute 1, the volute tongue 2, the first side plate 5, the second side plate 6 and the guide plate 4 are all made of sheet metal parts, which have the advantages of simple processing and high plasticity.

[0086] The air duct of the cross-flow fan is formed by bending sheet metal into the volute 1 and the volute tongue 2, and the side plates are processed by numerical control sheet metal and connected by screws, etc., which has the characteristics of low cost and uniform air supply.

[0087] In some embodiments, different overall structures with different structural dimensions are adapted by connecting multiple impellers 3 in series or increasing or decreasing the shaping dimensions of the volute tongue 2, the volute 1 and the impeller 3. The shaping dimensions here mainly include length dimensions, and the length dimension of the impeller 3 can be completed by increasing or reducing the number of intermediate sections 32.

[0088] In some embodiments, the connection of components such as the volute 1, the volute tongue 2, the first side plate 5 and the second side plate 6 can be riveting, or can be screw connection or bolt connection, etc.

[0089] In some embodiments, the installation method of the cross-flow fan includes:

[0090] The second part 22 of the volute tongue 2 is welded and assembled with a plurality of guide plates 4 to form a fixed plate assembly, and the fixed plate assembly is riveted to the front side 51 of the first side plate 5. The rear side 52 of the first side plate 5 is riveted to the volute casing 1. Here, the rear side 52 of the first side plate 5 envelopes the front side 51. After the cross-flow fan is installed, the rear side 52 of the first side plate 5 is close to the back plate of the housing. A bearing 9 is installed in the central hole of the first side plate 5, and the first shaft 34 of the impeller 3 is inserted into the bearing 9. After the impeller 3 is installed, the other sides of the volute tongue 2 and the volute casing 1 are riveted to the second side plate 6.

[0091] When the air duct assembly works, the impeller 3 rotates counterclockwise to draw in cold air from the air inlet 8, and the cold air is led out to the air outlet 7 by the volute casing 1 with a certain bent shape, and is evenly sent out through the guiding of a plurality of guide plates 4 in the air outlet 7, so as to achieve the purpose of temperature adjustment.

[0092] Some embodiments also provide an air conditioning device, which includes the above-mentioned cross-flow fan.

[0093] In some embodiments, the air conditioning device includes a housing, and the cross-flow fan is arranged in the housing.

[0094] When the cross-flow fan is installed in the housing, it is generally located at the angle between the top plate and the back plate of the housing. The top of the volute casing 1 is close to the top plate of the housing, and the side of the volute casing 1 is close to the back plate of the housing. The angle between the top plate and the back plate of the housing is approximately 90 degrees.

[0095] In some embodiments, the air conditioning device is an air conditioner, a fresh air system or a cold cabinet.

[0096] Based on the above embodiments of the present invention, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0097] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for the purpose of limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cross-flow fan, characterized in that, It includes a volute (1) formed by bending a sheet metal part. The volute (1) includes a first section (11), a tail section (12), and at least two intermediate sections (13) located between the first section (11) and the tail section (12). The angles formed by the first section (11) and the adjacent intermediate section (13), the tail section (12) and the adjacent intermediate section (13), and two adjacent intermediate sections (13) are all greater than zero degrees. The cross-flow fan further includes a volute tongue (2) and an impeller (3). The volute tongue (2) includes a first part (21) and a second part (22). The first part (21) cooperates with the volute (1) to enclose the impeller (3), and an air outlet (7) is formed between the second part (22) and the volute (1). ∠α = ∠β, where ∠α is the angle formed by the connecting line OA and the connecting line OC, ∠β is the angle formed by the connecting line OB and the connecting line OC, O is the center point of the radial section of the impeller (3), A is the point on the volute (1) closest to the center point O, B is the point on the first part (21) closest to the center point O, and C is the point on the extension line of the second part (22) closest to the center point O.

2. The cross-flow fan according to claim 1, characterized in that, The connecting line OA is perpendicular to the axial direction of the impeller (3).

3. The cross-flow fan according to claim 1, characterized in that, The point C is also a point on the impeller (3), and the extension line of the second part (22) is tangent to the radial section of the impeller (3) at the point C.

4. The cross-flow fan according to any one of claims 1 to 3, characterized in that, The first section (11) is located at the top of the volute (1) and at the position of the air inlet (8) of the cross-flow fan. The tail section (12) is located at the side of the volute (1) and at the position of the air outlet (7) of the cross-flow fan. The angle formed by the tangent line passing through the highest point of the first section (11) and the tangent line passing through the outermost point of the tail section (12) is ∠γ, and ∠γ = 90° ± 5°.

5. The cross-flow fan according to claim 4, characterized in that, where n is the number of bends of the volute, n≥3, and ∠d i is the angle at the i-th bend, and the value range of i is from 1 to n.

6. The cross-flow fan according to claim 5, characterized in that, ∠d i The value range of is (90°, 180°).

7. The cross-flow fan according to any one of claims 1 to 3, characterized in that, The first section (11) is located at the top of the volute (1) and at the position of the air inlet (8) of the cross-flow fan. The tail section (12) is located at the side of the volute (1) and at the position of the air outlet (7) of the cross-flow fan. The first section (11) is a horizontal section, and the tail section (12) is a vertical section. 40° ≤ ∠θ ≤ 60°, where ∠θ is the angle between the connecting line GD and the horizontal line L1, G is the leading end point on the cross-section of the volute (1) along the radial direction of the cross-flow fan, and D is the trailing end point on the cross-section of the volute (1) along the radial direction of the cross-flow fan.

8. The cross-flow fan according to any one of claims 1 to 3, characterized in that, The first section (11) is located at the top of the volute (1) and at the position of the air inlet (8) of the cross-flow fan. The tail section (12) is located at the side of the volute (1) and at the position of the air outlet (7) of the cross-flow fan. The first section (11) is a horizontal section, and the tail section (12) is a vertical section. 20° ≤ ∠ε ≤ 40°, where ∠ε is the angle between the connecting line EF and the horizontal line L2, E is the leading end point on the cross-section of the volute tongue (2) along the radial direction of the cross-flow fan, and F is the trailing end point on the cross-section of the volute tongue (2) along the radial direction of the cross-flow fan.

9. The cross-flow fan according to any one of claims 1 to 3, characterized in that, It further includes at least two air guide plates (4), the at least two air guide plates (4) are spaced apart and arranged at the air outlet (7), and each air guide plate (4) is respectively connected to the second part (22).

10. The cross-flow fan according to any one of claims 1 to 3, characterized in that, It further includes a first side plate (5) and a second side plate (6) made of sheet metal, the first side plate (5) is connected to the first side of the volute (1) and the volute tongue (2), the second side plate (6) is connected to the second side of the volute (1) and the volute tongue (2), and the second side and the first side are opposite sides.

11. The cross-flow fan according to any one of claims 1 to 3, characterized in that, The impeller (3) includes a head end section (31), a tail end section (33), and at least one intermediate section (32) connected in series between the head end section (31) and the tail end section (33).

12. The cross-flow fan according to claim 1, wherein, It further includes a volute tongue (2) formed by bending a sheet metal part.

13. An air conditioning device, characterized in that, It includes a cross-flow fan according to any one of claims 1 to 12.

14. The air conditioning device according to claim 13, characterized in that, The air conditioning equipment is an air conditioner, a fresh air system or a cold cabinet.

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