Volute, fan and air conditioner

Abstract

The utility model relates to the technical field of household appliances, in particular to a volute, a fan and an air conditioner, the volute comprises a first shell part and a second shell part, the cross section of the first shell part is of an arc-shaped structure with the middle protruding outwards in the radial direction of the first shell part, and an inner cavity is formed in the first shell part; a volute tongue is formed at the joint of the second shell part and the first shell part, and an air outlet is formed in the second shell part. The airflow gathers and circulates from the side edge of the first shell part to the middle part, the turbulence phenomenon caused by the consistent distance between the volute and the outer edge of the blade is avoided, reasonable distance adjustment is conducted according to air volume distribution, the airflow confusion degree in the first shell part is reduced, airflow pressure distribution in the first shell part is balanced, and then the fan noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially, relate to a volute, fan and air conditioner. BACKGROUND

[0002] The existing fresh air air conditioner product can provide fresh air function, and the outdoor wind is introduced into the indoor through the fresh air fan, but the existing air conditioner fan is ordinary centrifugal fan, and the surface of the fan volute along the axial direction is basically flat structure, which is not suitable for the complex flow field of the air flow of the fresh air of the air conditioner, the air flow efficiency is low, the air flow in the fan is chaotic, the noise is relatively high, and the corresponding problems of high energy consumption and high power are caused. SUMMARY

[0003] The utility model provides a volute, fan and air conditioner to solve one of defects in prior art, the air flow is gathered and flows through from the side of the first shell part to the middle part, avoids the turbulence phenomenon caused by the consistent distance between the volute and the outer edge of the blade, adjusts the distance reasonably according to the air volume distribution, reduces the chaotic degree of the air flow in the first shell part, balances the air flow pressure distribution in the first shell part, and further reduces the fan noise.

[0004] The utility model provides a volute, it includes:

[0005] The first shell part is the arc structure that the middle part is along the radial direction of the first shell part and protrudes outward, and the inside of the first shell part is provided with an inner cavity;

[0006] The second shell part is connected with the first shell part, and the connection part of the second shell part and the first shell part forms a volute tongue, and the second shell part forms an air outlet.

[0007] According to the volute provided by the utility model, the arc cross section structure of the first shell part is a symmetrical structure.

[0008] According to the volute provided by the utility model, the outer contour line of the first shell part is a spiral line with gradually increasing spiral radius.

[0009] According to the volute provided by the utility model, the central angle of the cross section of the first shell part gradually increases from inside to outside along the spiral direction of the outer contour line of the first shell part.

[0010] According to the volute provided by the utility model, the maximum central angle of the cross section of the first shell part is between 185 ° and 190 °.

[0011] According to the volute provided by the utility model, the minimum radius of the cross section of the first shell part is between 44 mm and 46 mm.

[0012] The volute is characterized in that the spiral angle of the outer contour line of the first shell part is between 315 degrees and 325 degrees.

[0013] The volute is characterized in that the minimum spiral radius of the outer contour line of the first shell part is between 110 mm and 120 mm, and the maximum spiral radius of the outer contour line of the first shell part is between 160 mm and 170 mm.

[0014] The utility model also provides a fan, including impeller and as above described volute, the impeller is arranged in the inner chamber of volute.

[0015] The utility model also provides an air conditioner, including as above described fan.

[0016] The volute of the utility model embodiment, the shell is composed of first shell part and second shell part, the first shell part surrounds and sets out the inner chamber, the second shell part surrounds and sets out the air outlet, the first shell part is connected with the second shell part, to make the inner chamber and the air outlet communicate, and the first shell part and the second shell part connection form volute tongue. The whole of first shell part is cylindrical design, the cross section of first shell part is the plane along the radial direction of first shell part and the axial plane of first shell part, and the shape of any cross section of first shell part is the arc structure that protrudes outward along the radial direction of first shell part, that is, the structure of the outer convex bending of the middle part of first shell part in the axial direction.

[0017] The impeller is arranged in the inner chamber of first shell part, and the impeller rotates and sucks the external air into the inner chamber, and the first shell part is equivalent to being arranged outside the blade edge of the impeller, and the design of the first shell part makes the structure shape of the position of the middle part of the first shell part higher than the positions of both ends, that is, the unequal distance cooperation structure is formed between the outer edge of the blade and the first shell part, the middle position of the outer edge of the blade corresponds to the middle part of the first shell part, the distance is relatively large, the both end positions of the outer edge of the blade correspond to the both end parts of the first shell part, and the distance is relatively small, that is, the distance between the outer edge of the blade and the inner side surface of the first shell part along the axial direction of the first shell part gradually changes from small to large and then to small.

[0018] Because the air volume on both sides of the impeller is low, the air volume in the middle position is high, the air volume on both ends of the outer edge of the blade is low, and the air volume in the middle position of the outer edge of the blade is high, the design of the first shell part can make the airflow gather and flow from the side edge to the middle part of the first shell part when the impeller rotates and sucks air, avoid the turbulence phenomenon caused by the consistent distance between the volute and the outer edge of the blade, adjust the distance reasonably according to the air volume distribution, reduce the airflow turbulence degree in the first shell part, balance the airflow pressure distribution in the first shell part, and further reduce the noise of the fan, so that the air outlet sound of the fan is softer, and the comfort is improved.

[0019] Moreover, the cross-section arc-shaped design of the first shell part can make the air flow on both sides concentrate to the middle part, so as to further increase the air suction effect of the impeller, increase the air volume entering the inner cavity of the first shell part and the air volume and the air pressure of the outlet air, thereby reducing the energy consumption of the fan, improving the outlet air efficiency, saving energy. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0021] Figure 1 is a structural schematic diagram of the fan provided by the embodiment of the present application;

[0022] Figure 2 is a front view of the volute provided by the embodiment of the present application;

[0023] Figure 3 is Figure 2 F-F sectional view of

[0024] Figure 4 is a bottom view of the volute provided by the embodiment of the present application.

[0025] Reference signs:

[0026] 100, shell; 110, air outlet; 120, inner cavity; 130, volute tongue; 131, middle part; 132, first end part; 133, second end part; 140, first shell part; 141, outer contour line; 150, second shell part;

[0027] 200, impeller. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely in the following with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] In the description of the embodiments of the utility model, it needs to explain, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the embodiments of the utility model and simplifying the description, and it is not indicated or implied that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as the limitation of the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the embodiments of the utility model, it needs to explain, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0031] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or just indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or just indicate that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" 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 embodiments of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0033] As Figures 1 to 4The volute provided by the embodiment of the utility model shows, the utility model discloses a volute, including shell 100, shell 100 is equipped with air outlet 110, inner chamber 120 and volute tongue 130, volute tongue 130 sets up at the position of the intercommunication of air outlet 110 and inner chamber 120, and volute tongue 130 is the curved convex arc-shaped structure of the air outlet direction of the middle part to air outlet 110.

[0034] The volute of the embodiment of the utility model, the inner chamber 120 and air outlet 110 are communicated, and the volute tongue 130 is formed at the communicating position of the shell 100, the volute tongue 130 is an arc-shaped structure, and the middle part of the arc-shaped volute tongue 130 is convexly curved to the air outlet direction of the air outlet 110. The impeller 200 is arranged in the inner chamber 120 of the shell 100 to form a fan as a whole, the external air is sucked into the inner chamber 120 by the rotation of the impeller 200, and the airflow in the inner chamber 120 passes through the volute tongue 130 when entering the air outlet 110. The design of the arc-shaped volute tongue 130 makes the middle part of the volute tongue 130 higher than the two ends, that is, the outer edge of the blade of the impeller 200 and the volute tongue 130 form an unequal distance matching structure, and the airflow in the inner chamber 120 first contacts the two end positions of the volute tongue 130 to enter the air outlet 110, and then contacts the middle part of the volute tongue 130 to enter the air outlet 110. Therefore, in the process of periodic impact of the volute tongue 130 by the airflow, the airflow flowing from the same blade edge can impact the volute tongue 130 at different time points due to the change of the distance between the airflow and the volute tongue 130, so that the noise generated by the impact cannot be superimposed, thereby reducing the noise of the fan and making the air outlet sound of the fan softer.

[0035] Moreover, the middle part of the volute tongue 130 is convex, which is equivalent to increasing the working distance of the airflow concentrated in the middle range, thereby improving the pressure in the inner chamber 120 to facilitate air suction of the fan. The convex curved structure of the middle part of the volute tongue 130 can expand the flow space of the middle airflow flowing from the inner chamber 120 to the air outlet 110, reduce the flow resistance, further improve the airflow volume of the middle airflow flowing into the air outlet 110, and thereby improve the air outlet efficiency of the fan.

[0036] According to one embodiment of the utility model, the volute tongue 130 includes a middle part 131 and two end parts, the middle part 131 is curved and convex to the air outlet direction of the air outlet 110; the two end parts are respectively connected to the two ends of the middle part 131 and are oppositely arranged, and at least one end part is gradually curved and convex to the inner chamber 120 along the air outlet direction of the air outlet 110.

[0037] In the embodiment, the volute tongue 130 is composed of a middle part 131 and two end parts, the whole volute tongue 130 is in a curved strip shape, the middle part 131 is in a circular arc shape which is curved and protrudes in the air outlet direction of the air outlet 110, the two end parts are respectively connected at two ends of the circular arc middle part 131, the two end parts can be a first end part 132 and a second end part 133 which are oppositely arranged, the first end part 132 and the second end part 133 are both extended from the junction of the air outlet 110 and the cavity to the circular arc middle part 131 in the air outlet direction of the air outlet 110, at least one of the first end part 132 and the second end part 133 gradually curves and protrudes to the inner cavity 120 in the extending process, thereby forming a strip-shaped protrusion which protrudes to the inner cavity 120 in the axial direction of the volute at the junction of the inner cavity 120 and the air outlet 110.

[0038] Since the end parts are located at the side edge positions of the volute tongue 130, the protruding design of the end parts to the inner cavity 120 can make the air flow in the side edge range discharged from the inner cavity 120 turn into the air outlet 110 earlier than the air flow concentrated in the middle range, the end parts guide the air flow in the side edge range, so that the air flow in the side edge range can be separated from the inner cavity 120 and enter the air outlet 110 in advance, the air flow in the side edge range has a small flow rate, thereby reducing the power of the fan and reducing energy consumption.

[0039] According to one embodiment of the utility model, the two end parts are symmetrically arranged. In the embodiment, the first end part 132 and the second end part 133 are both gradually curved and protrude to the inner cavity 120 in the extending process, thereby forming a strip-shaped protrusion which protrudes to the inner cavity 120 in the axial direction of the volute at the junction of the inner cavity 120 and the air outlet 110, the extension and the curvature of the first end part 132 and the second end part 133 are consistent, and the first end part 132 and the second end part 133 are symmetrically distributed.

[0040] The first end part 132 and the second end part 133 are symmetrically arranged at two sides of the circular arc middle part 131, thereby making the volute tongue 130 form a symmetric structure, making the air flow in the two side edge ranges discharged from the inner cavity 120 turn into the air outlet 110 earlier than the air flow concentrated in the middle range, the two end parts guide the air flow in the two side edge ranges, further improving the air flow separation effect, reducing the power of the fan, and reducing energy consumption.

[0041] According to one embodiment of the utility model, the distribution angle a of the intermediate part 131 in the circumferential direction of the shell 100 is between 20 DEG and 25 DEG. In this embodiment, the shell 100 is in the shape of a cylinder, the distribution angle a of the intermediate part 131 of the volute tongue 130 is the length range of the intermediate part 131, the volute tongue 130 is formed in the circumferential side of the volute, and the distribution angle a of the intermediate part 131 in the 360 DEG direction range of the shell 100 is limited to 20 DEG to 25 DEG, that is, the length distribution of the intermediate part 131 covers 20 DEG to 25 DEG of the circumference, which can ensure the formation of the inner cavity 120 and the air outlet 110 on the one hand and can ensure the area of the flow passage between the inner cavity 120 and the air outlet 110 on the other hand, thereby ensuring the normal pressure of the fan.

[0042] According to one embodiment of the utility model, the vertical distance A between the two ends of the intermediate part 131 is between 70mm and 76mm. In this embodiment, the vertical distance A between the two ends of the intermediate part 131 of the volute tongue 130 is the maximum width range of the intermediate part 131, the width direction of the intermediate part 131 is parallel to the axial direction of the volute, and therefore the maximum width range of the intermediate part 131 is limited to 70mm to 76mm, thereby ensuring the width of the communication area between the inner cavity 120 and the air outlet 110 of the volute.

[0043] According to one embodiment of the utility model, the distribution angle b of the end part in the circumferential direction of the shell 100 is between 35 DEG and 40 DEG. In this embodiment, the shell 100 is in the shape of a cylinder, the distribution angle b of the end part of the volute tongue 130 is the length range of the end part, the volute tongue 130 is formed in the circumferential side of the volute, and the distribution angle b of the end part in the 360 DEG direction range of the shell 100 is limited to 35 DEG to 40 DEG, that is, the length distribution of the end part covers 35 DEG to 40 DEG of the circumference, which can ensure the formation of the inner cavity 120 and the air outlet 110 on the one hand and can ensure the area of the flow passage between the inner cavity 120 and the air outlet 110 on the other hand, thereby ensuring the normal pressure of the fan.

[0044] In this embodiment, the sum of the length of the intermediate part 131 and the length distribution range of the end part of the volute tongue 130 is the length distribution range of the volute tongue 130. After optimization analysis and internal air speed pressure analysis, the distribution angle of the volute tongue 130 is limited to 55 DEG to 65 DEG. In other embodiments, the distribution angle of the volute tongue 130 can be adjusted according to actual needs, and the distribution angles of the intermediate part 131 and the end part of the volute tongue 130 can also be adjusted accordingly.

[0045] According to one embodiment of the utility model, the perpendicular distance of the two end portions gradually decreases along the air outlet direction, and the maximum perpendicular distance B is between 88mm and 79mm. In this embodiment, the width of the volute tongue 130 at its end portion position gradually decreases along the air outlet direction, and the maximum perpendicular distance B is limited to 88mm to 79mm. The distance between the two end portions gradually decreases to the perpendicular distance between the two ends of the middle portion 131, that is, from 88mm to 79mm to 70mm to 76mm. The tapered width of the volute tongue 130 forms a corresponding tapered area in the area where the inner cavity 120 communicates with the air outlet 110, stabilizes the air outlet, and improves the airflow discharge efficiency of the middle portion of the fan.

[0046] As shown in Figures 1 to 4 The utility model discloses a volute, which comprises a first shell portion 140 and a second shell portion 150. The cross-sectional shape of the first shell portion 140 is an arc structure that protrudes outward along the radial direction of the first shell portion 140. The first shell portion 140 is internally provided with an inner cavity 120. The second shell portion 150 is connected to the first shell portion 140 to form a volute tongue 130. The second shell portion 150 forms an air outlet 110.

[0047] The volute of the utility model comprises a shell body 100, which is composed of the first shell portion 140 and the second shell portion 150. The first shell portion 140 surrounds the inner cavity 120, and the second shell portion 150 surrounds the air outlet 110. The first shell portion 140 is connected to the second shell portion 150 to enable the inner cavity 120 and the air outlet 110 to communicate. The connection between the first shell portion 140 and the second shell portion 150 forms the volute tongue 130. The overall structure of the first shell portion 140 is designed in a cylindrical shape. The cross section of the first shell portion 140 is a plane that is perpendicular to the axial direction of the first shell portion 140. The cross-sectional shape of the first shell portion 140 is an arc structure that protrudes outward along the radial direction of the first shell portion 140, that is, the first shell portion 140 is curved outward at the middle portion in the axial direction.

[0048] The impeller 200 is arranged in the inner cavity 120 of the first shell portion 140. The impeller 200 rotates to suck external air into the inner cavity 120. The first shell portion 140 is designed to surround the outer side of the blade edge of the impeller 200. The design of the first shell portion 140 makes the middle portion of the first shell portion 140 higher than the two ends. That is, the outer edge of the blade of the impeller 200 and the first shell portion 140 form a non-equidistant cooperation structure. The middle portion of the outer edge of the blade corresponds to the middle portion of the first shell portion 140, and the distance is relatively large. The two end portions of the outer edge of the blade correspond to the two end portions of the first shell portion 140, and the distance is relatively small. That is, the distance between the outer edge of the blade and the inner side of the first shell portion 140 gradually changes along the axial direction of the first shell portion 140.

[0049] Due to the low air volume on both sides of the impeller 200, the high air volume in the middle position, the low air volume at both ends of the outer edge of the blade, and the high air volume in the middle position of the outer edge of the blade, the design of the first shell part 140 can make the air flow gather from the side to the middle part of the first shell part 140 when the impeller 200 rotates to suck air, thereby avoiding the turbulence phenomenon caused by the consistent distance between the volute and the outer edge of the blade, adjusting the distance reasonably according to the air volume distribution, reducing the degree of air flow disorder in the first shell part 140, balancing the air pressure distribution in the first shell part 140, and further reducing the noise of the fan. The sound of the fan is softer, and the comfort is improved.

[0050] Moreover, due to the arc-shaped cross-section design of the first shell part 140, the air flow on both sides can be concentrated to the middle part, which can further increase the air suction effect of the impeller 200, increase the air volume entering the inner cavity 120 of the first shell part 140 and the air volume, increase the air pressure, and further reduce the energy consumption of the fan, improve the air outlet efficiency, and save energy.

[0051] According to one embodiment of the present application, the arc-shaped cross-section structure of the first shell part 140 is a symmetrical structure. In this embodiment, the arc-shaped cross-section shape of the first shell part 140 is a circular arc design with the middle part outwardly convex and the two ends concave, and the whole is a symmetrical structure, which can further improve the air flow concentration effect in the first volute, adjust and balance the pressure distribution, and facilitate the processing and manufacturing of the first shell part 140.

[0052] In other embodiments, the arc-shaped cross-section of the first shell part 140 can also be an asymmetric structure, and the arc-shaped cross-section shape can be designed according to the actual fan requirements.

[0053] According to one embodiment of the present application, the outer contour line 141 of the first shell part 140 is a spiral line with gradually increasing spiral radius. In this embodiment, the innermost contour line is the inner contour line of the first shell part 140, and the outermost contour line is the outer contour line 141 of the first shell part 140 after the first shell part 140 is projected on a plane perpendicular to the axial direction. The inner contour line can be circular, and the outer contour line 141 can be spiral. According to the air suction and air outlet requirements of the fan, the outer contour line 141 is designed as a spiral line with gradually increasing spiral radius in the spiral direction from inside to outside.

[0054] Since the outer contour line 141 of the first shell part 140 is a spiral line with gradually increasing spiral radius, the inner contour line coincides with the outer contour line 141 at the spiral starting end, and the inner contour line is a certain distance away from the outer contour line 141 at the spiral ending end. The second shell part 150 is arranged at the spiral ending end of the first shell part 140, and the second shell part 150 connects the spiral ending end and the spiral starting end to form a volute tongue 130 at the connection between the spiral starting end and the second shell part 150.

[0055] According to one embodiment of the utility model, the central angle of the cross section of the first shell part 140 gradually increases from inside to outside along the spiral direction of the outer contour line 141 of the first shell part 140. In this embodiment, the central angle of the arc cross section of the first shell part 140 gradually increases from the spiral starting end to the spiral ending end of the outer contour line 141, that is, the curvature of the cross section of the first shell part 140 gradually increases, and under the condition that the width of the first shell part 140 along the axial direction is constant, the effect of gradually increasing the space of the inner cavity 120 is realized by the curvature variation of the arc cross section, so that the air intake and air output of the fan are further improved under the premise of meeting the fan pressure requirement.

[0056] According to one embodiment of the utility model, the maximum central angle d of the cross section of the first shell part 140 is between 185° and 190°. In this embodiment, the cross section of the first shell part 140 at the spiral ending end of the outer contour line 141 has the maximum central angle d, and under the premise of meeting the fan pressure requirement, the maximum central angle d is limited to 185° to 190° to ensure the maximum air intake and air output of the fan.

[0057] According to one embodiment of the utility model, the minimum radius D of the cross section of the first shell part 140 is between 44mm and 46mm. In this embodiment, since the width of the first shell part 140 along the axial direction is limited, the minimum radius D of the arc cross section of the first shell part 140 is also located at the spiral ending end of the outer contour line 141, and under the premise of meeting the size of the central angle of the cross section at this position, the minimum radius D is limited to 44mm to 46mm to realize the maximization of the air intake and air output of the fan.

[0058] According to one embodiment of the utility model, the spiral angle c of the outer contour line 141 of the first shell part 140 is between 315° and 325°. In this embodiment, in order to ensure the overall shape of the volute, the spiral angle c of the outer contour line 141 of the first shell part 140 is limited to 315° to 325°, so that the first shell part 140 has enough space of the inner cavity 120 to cooperate with the impeller 200 to perform air intake and pressure accumulation, and also has enough space and angle to ensure the length and extension direction of the second shell part 150, so as to meet the air output requirement of the fan.

[0059] According to one embodiment of the utility model, the minimum spiral radius e of the outer contour line 141 of the first shell part 140 is between 110mm and 120mm, and the maximum spiral radius E of the outer contour line 141 of the first shell part 140 is between 160mm and 170mm. In this embodiment, the first shell part 140 has the minimum spiral radius e at the spiral starting end of the outer contour line 141 and has the maximum spiral radius E at the spiral ending end of the outer contour line 141, so as to ensure the overall size of the fan by limiting the minimum spiral radius e to 110mm to 120mm and limiting the maximum spiral radius E to 160mm to 170mm.

[0060] The fan provided by the utility model will be described below, and the fan described below can be correspondingly referred to the volute described above.

[0061] The utility model embodiment further provides a fan, comprising an impeller 200 and the volute of the above embodiment, and the impeller 200 is arranged in the inner cavity 120 of the volute.

[0062] The air conditioner provided by the utility model will be described below, and the air conditioner described below can be correspondingly referred to the fan described above.

[0063] The utility model embodiment further provides an air conditioner, comprising the fan of the above embodiment.

[0064] The utility model relates to a fresh air technology integrated in an air conditioner, a high-pressure centrifugal fan for fresh air of the air conditioner, and the fan is used as power to introduce outdoor air into a room through a fresh air pipe.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the utility model embodiments.

Claims

1. A volute, characterized in that, The application relates to a volute, comprising: a first shell part (140), the cross-sectional shape of the first shell part (140) being an arc structure with a middle part protruding radially outward, and the inside of the first shell part (140) being provided with an inner cavity (120); a second shell part (150), the connection part of the second shell part (150) and the first shell part (140) forming a volute tongue (130), and the second shell part (150) forming an air outlet (110).

2. The volute of claim 1, wherein The arc cross-sectional structure of the first shell part (140) is a symmetrical structure.

3. A volute according to claim 1 or 2, characterised in that The outer contour line (141) of the first shell part (140) is a spiral line with gradually increasing spiral radius.

4. The volute of claim 3, wherein The central angle of the cross section of the first shell part (140) gradually increases from inside to outside along the spiral direction of the outer contour line (141) of the first shell part (140).

5. The volute of claim 3, wherein, The maximum central angle of the cross section of the first shell part (140) is between 185 degrees and 190 degrees.

6. The volute of claim 3, wherein, The minimum radius of the cross section of the first shell part (140) is between 44 mm and 46 mm.

7. The volute of claim 3, wherein The spiral angle of the outer contour line (141) of the first shell part (140) is between 315 degrees and 325 degrees.

8. The volute of claim 3, wherein, The minimum spiral radius of the outer contour line (141) of the first shell part (140) is between 110 mm and 120 mm, and the maximum spiral radius of the outer contour line (141) of the first shell part (140) is between 160 mm and 170 mm.

9. A fan, characterized by The application further relates to a fan, comprising a volute and a impeller (200), wherein the impeller (200) is arranged in the inner cavity (120) of the volute.

10. An air conditioner characterized by comprising: The application further relates to a fan, comprising the volute according to claim 9.

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