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 shell, the shell is provided with an air outlet, an inner cavity and a volute tongue, the volute tongue is arranged at the position where the air outlet is communicated with the inner cavity, and the volute tongue is of an arc-shaped structure with the middle bent and protruding towards the air outlet direction of the air outlet. In the process that the air flow periodically impacts the volute tongue, due to the fact that the distance that the air flow impacts the volute tongue is changed, the air flow flowing out of the edge of the same blade can impact the volute tongue at different time points, noise generated by impact cannot be overlapped, then the noise of the draught fan is reduced, and the air outlet sound of the draught fan can be softer.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, especially to a volute, fan and air conditioner. BACKGROUND

[0002] The existing fresh air conditioner product can provide fresh air function, and the outdoor air is introduced into the indoor by the fresh air fan, but the existing air conditioner fan is a common centrifugal fan, and the volute tongue is basically a 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 energy consumption and power are high. SUMMARY

[0003] The utility model provides a volute, fan and air conditioner to solve one of defects in prior art, in the process that air flow periodical impact volute tongue, because the distance of air flow impact volute changes, the air flow of the same blade edge can impact volute at different time points, the noise generated by impact cannot be superimposed, thereby reducing the noise of fan, and the sound of air outlet of fan can be softer.

[0004] The utility model provides a volute, including the shell, the shell is equipped with the air outlet, inner chamber and volute tongue, the volute tongue sets up at the position that the air outlet is connected with the inner chamber, the volute tongue is the curved convex arc shape structure of the outflow direction of the air outlet to the middle part.

[0005] According to the volute provided by the utility model, the volute tongue comprises:

[0006] The middle part is curved and convex to the outflow direction of the air outlet;

[0007] Two end parts are respectively connected to the two ends of the middle part and oppositely arranged, and at least one end part is gradually curved and convex to the inner chamber along the outflow direction of the air outlet.

[0008] According to the volute provided by the utility model, the two end parts are symmetrically arranged.

[0009] According to the volute provided by the utility model, the distribution angle of the middle part in the circumferential direction of the shell is between 20° and 25°.

[0010] According to the volute provided by the utility model, the perpendicular distance between the two ends of the middle part is between 70 mm and 76 mm.

[0011] According to the volute provided by the utility model, the distribution angle of the end part in the circumferential direction of the shell is between 35° and 40°.

[0012] The vertical distance of the two end portions gradually decreases along the air outlet direction, and the maximum vertical distance is between 88mm and 79mm.

[0013] The shell comprises:

[0014] The first shell portion has an arc-shaped structure with a middle portion protruding radially outwardly from the shell, and the first shell portion is internally provided with the inner cavity;

[0015] The second shell portion is connected to the first shell portion to form the volute tongue, and the second shell portion forms the air outlet.

[0016] The utility model also provides a fan, which comprises an impeller and the volute shell as described above, and the impeller is arranged in the inner cavity of the volute shell.

[0017] The utility model also provides an air conditioner, which comprises the fan as described above.

[0018] The volute shell comprises a shell, an inner cavity and an air outlet, the inner cavity and the air outlet are communicated, the shell forms a volute tongue at the communication position, the volute tongue has an arc-shaped structure, and the middle portion of the arc-shaped volute tongue protrudes in the air outlet direction of the air outlet.

[0019] In addition, the middle portion of the volute tongue protrudes, which is equivalent to increasing the working distance of the airflow concentrated in the middle range, thereby improving the pressure in the inner cavity to facilitate air suction of the fan. 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 prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

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

[0022] Figure 2 is a front view of a 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 solutions and advantages of the present application more clear, the following will combine the drawings in the present application to clearly and completely describe the technical solutions 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 present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. 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 be explained that, unless there is explicit provision and limitation, the terms "connected", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through 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 specific circumstances.

[0031] In the embodiments of the utility model, unless there is explicit provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only 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 does not necessarily refer to 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, the 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 shown in Figures 1 to 4 The utility model discloses a volute provided by the embodiments of the utility model, including the casing 100, the casing 100 is equipped with the air outlet 110, inner chamber 120 and volute tongue 130, volute tongue 130 sets up at the position of the communication of air outlet 110 and inner chamber 120, volute tongue 130 is the curved convex arc structure of the outflow direction of air outlet 110 to the middle.

[0034] The volute shell is characterized in that the shell body 100 surrounds an inner cavity 120 and an air outlet 110, the inner cavity 120 and the air outlet 110 are communicated, the shell body 100 forms a volute tongue 130 at the communication position, the volute tongue 130 is in an arc structure, and the middle part of the arc volute tongue 130 is in a curved form protruding to the air outlet direction of the air outlet 110.

[0035] In addition, the middle part of the volute tongue 130 is protruded, which is equivalent to increasing the working distance of the airflow concentrated in the middle range, thereby improving the pressure of the inner cavity 120, facilitating the air suction of the fan, and the middle arc protruding and bending structure of the volute tongue 130 can expand the flow space of the middle airflow flowing from the inner cavity 120 into the air outlet 110, reduce the flow resistance, further improve the air volume of the middle airflow flowing into the air outlet 110, and improve the air outlet efficiency of the fan.

[0036] According to one embodiment of the utility model, the volute tongue 130 comprises a middle part 131 and two end parts, the middle part 131 is curved and protruded 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 oppositely arranged, and at least one end part is gradually curved and protruded to the inner cavity 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 make the inner cavity 120 and the air outlet 110 communicate with each other. 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 as a cylinder. The cross section of the first shell portion 140 is a plane that is parallel to the axial direction of the first shell portion 140 and is obtained by cutting along the radial 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 arranged outside 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 blade outer edge of the impeller 200 and the first shell portion 140 form a non-equidistant cooperation structure. The middle portion of the blade outer edge corresponds to the middle portion of the first shell portion 140, and the distance is relatively large. The two end portions of the blade outer edge 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 shell (100) is provided with an air outlet (110), an inner cavity (120) and a volute tongue (130) arranged at the communication position of the air outlet (110) and the inner cavity (120), wherein the volute tongue (130) is an arc-shaped structure curved and protruded towards the air outlet direction of the air outlet (110).

2. The volute of claim 1, wherein, The volute tongue (130) comprises: a middle part (131) curved and protruded towards the air outlet direction of the air outlet (110); two end parts respectively connected to the two ends of the middle part (131) and oppositely arranged, and at least one of the end parts is gradually curved and protruded towards the inner cavity (120) along the air outlet direction of the air outlet (110).

3. The volute of claim 2, wherein, The two end parts are symmetrically arranged.

4. The volute of claim 2, wherein, The distribution angle of the middle part (131) in the circumferential direction of the shell (100) is between 20° and 25°.

5. The volute of claim 2, wherein, The vertical distance between the two ends of the middle part (131) is between 70mm and 76mm.

6. The volute of claim 2, wherein, The distribution angle of the end part in the circumferential direction of the shell (100) is between 35° and 40°.

7. The volute of claim 2, wherein The vertical distance between the two end parts gradually decreases along the air outlet direction, and the maximum vertical distance is between 88mm and 79mm.

8. A volute according to any one of claims 1 to 7, characterised in that The shell (100) comprises: a first shell part (140) with an arc-shaped structure protruding outward along the radial direction of the shell (100) in the cross-sectional shape, and the inner part of the first shell part (140) is provided with the inner cavity (120); a second shell part (150) forming the volute tongue (130) at the connection with the first shell part (140), and the second shell part (150) forms the air outlet (110).

9. A fan, characterized by The fan comprises an impeller (200) and the volute shell according to any one of claims 1 to 8, wherein the impeller (200) is arranged in the inner cavity (120) of the volute shell.

10. An air conditioner characterized by comprising: The fan comprises the fan according to claim 9.

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