Volute structure, fan system with volute structure and integrated cooker

Abstract

The utility model discloses a volute structure, a fan system with the volute structure and an integrated cooker, the volute structure comprises a volute coaming, a first side plate and a second side plate, and the volute coaming is fixedly arranged between the first side plate and the second side plate; the volute coaming comprises a volute tongue section, the first side plate and the second side plate are of an asymmetric structure at the volute tongue section, and the molded line of the volute tongue section is a wing-shaped molded line; the volute tongue section comprises a first arc surface section, a first curved surface section and a second curved surface section, one end of the first arc surface section is connected with one end of the first curved surface section, the other end of the first arc surface section is connected with one end of the second curved surface section, and the first curved surface section and the second curved surface section are oppositely arranged. According to the embodiment of the utility model, the impact of airflow on the volute tongue can be effectively relieved, the flow separation of air near the volute tongue is reduced, and the noise of a fan system is effectively reduced under the condition that the impeller and the rotating speed are not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, and in particular to a volute structure, a fan system with the volute structure, and an integrated stove. Background Art

[0002] With the popularization of range hoods, they have become one of the indispensable kitchen appliances in modern families. Range hoods generally use centrifugal fans as their power systems. The volute, as one of the core components of the centrifugal fan, concentrates and guides the gas leaving the impeller and converts part of the kinetic energy of the gas into static pressure. The existing volute structure needs to be further improved in terms of improving the gas flow state at the volute tongue and reducing noise. Utility Model Content

[0003] In view of the above problems in the prior art, the utility model discloses a volute structure, a fan system and an integrated stove having the volute structure, which can effectively alleviate the impact of airflow on the volute tongue, reduce the flow separation of gas near the volute tongue, and effectively reduce the noise of the fan system without changing the impeller and the rotation speed. The technical solution disclosed in the utility model is as follows:

[0004] According to one aspect of the embodiment disclosed in the utility model, there is provided a volute structure, comprising a volute enclosure, a first side plate and a second side plate, wherein the volute enclosure is fixedly disposed between the first side plate and the second side plate;

[0005] The volute enclosure includes a volute tongue section, the first side plate and the second side plate are asymmetrical structures at the volute tongue section, and the profile of the volute tongue section is an airfoil profile;

[0006] The volute tongue segment includes a first arc surface segment, a first curved surface segment and a second curved surface segment, one end of the first arc surface segment is connected to one end of the first curved surface segment, the other end of the first arc surface segment is connected to one end of the second curved surface segment, and the first curved surface segment and the second curved surface segment are arranged opposite to each other.

[0007] Optionally, the radius of the first arc is different from the radius of the second arc, and the vertical distance between the first curved surface segment and the second curved surface segment gradually increases from the first end to the second end;

[0008] The first arc line is a connecting line between the first arc surface segment and the first side panel, the second arc line is a connecting line between the first arc surface segment and the second side panel, the first end is an end of the first arc line and the second arc line where the arc with a smaller radius is located, and the second end is an end of the first arc line and the second arc line where the arc with a larger radius is located.

[0009] Optionally, the first distance is different from the second distance, and the first arc surface segment is an inclined smoothly transitioned twisted surface;

[0010] The first distance is the distance from the vertex of the first arc line to the vertical plane of the plane where the first side plate is located, and the second distance is the distance from the vertex of the second arc line to the vertical plane.

[0011] Optionally, the first side panel and the second side panel are provided with air inlets opposite to each other, the angle between the target line and the vertical plane of the plane where the first side panel is located is 40 degrees to 50 degrees, the distance between the intersection of the target line and the edge of the air inlet and the vertex of the target line is 18 mm to 23 mm, and the radius of the first arc and the radius of the second arc are 10 mm to 20 mm;

[0012] The target connection line is a connection line between the center point of the air inlet and the vertex of the target connection line, and the target connection line is a connection line between the first arc and the second arc with a shorter distance between the vertex and the vertical plane.

[0013] Optionally, the volute enclosure, the first side plate and the second side plate together form an air cavity and a first air outlet, and the first air outlet is connected to the air cavity;

[0014] The volute enclosure further includes a spiral surface segment and a first air outlet segment, the other end of the first curved surface segment is connected to the first air outlet segment, and the other end of the second curved surface segment is connected to one end of the spiral surface segment.

[0015] Optionally, the volute enclosure, the first side plate and the second side plate together form a second air outlet, the second air outlet is connected to the air cavity, and the first air outlet is arranged opposite to the second air outlet;

[0016] The volute enclosure also includes a second arc surface segment and a second air outlet segment, one end of the second arc surface segment is connected to the other end of the spiral surface segment, the other end of the second arc surface segment is connected to the second air outlet segment, and the radius of the second arc surface segment is 65mm-75mm.

[0017] Optionally, the radii of the first curve and the second curve are different, the profiles of the first curve and the third curve are the same, and the profiles of the second curve and the fourth curve are the same;

[0018] The first curve is a connecting line between the first curved surface segment and the first side panel, the second curve is a connecting line between the second curved surface segment and the first side panel, the third curve is a connecting line between the first curved surface segment and the second side panel, and the fourth curve is a connecting line between the second curved surface segment and the second side panel.

[0019] According to another aspect of the disclosed embodiment of the utility model, a fan system is provided, comprising a motor, an impeller and a volute structure as described in any one of the above, wherein the volute enclosure, the first side plate and the second side plate together form a wind cavity, and the motor and the impeller are arranged in the wind cavity;

[0020] The impeller comprises an impeller center disk, and at least two vent holes are arranged on the impeller center disk, and the at least two vent holes are evenly distributed on the impeller center disk.

[0021] Optionally, the fan system further includes a motor bracket, the motor bracket is arranged at the air inlet on the first side panel, and the motor is fixedly connected to the motor bracket;

[0022] The motor bracket includes a first supporting portion, a second supporting portion and at least two supporting legs, the first supporting portion is fixedly connected to the first side panel, the second supporting portion is located in the wind cavity, one end of each supporting leg is fixedly connected to the first supporting portion, the other end of each supporting leg is fixedly connected to the second supporting portion, and the motor is fixedly connected to the second supporting portion; a guide portion is provided on the first supporting portion.

[0023] According to another aspect of the disclosed embodiment of the utility model, there is provided an integrated stove, comprising the above-mentioned fan system.

[0024] The technical solution provided by the embodiments disclosed in the present utility model brings at least the following beneficial effects:

[0025] The volute structure provided by the utility model comprises a volute enclosure, a first side plate and a second side plate, wherein the volute enclosure is fixedly arranged between the first side plate and the second side plate; the volute enclosure comprises a volute tongue section, and the first side plate and the second side plate are asymmetric structures at the volute tongue section, and the profile of the volute tongue section is an airfoil profile; the volute tongue section comprises a first arc surface section, a first curved surface section and a second curved surface section, one end of the first arc surface section is connected to one end of the first curved surface section, and the other end of the first arc surface section is connected to one end of the second curved surface section, and the first curved surface section and the second curved surface section are arranged relative to each other, so that an asymmetric volute tongue structure with an airfoil profile is formed by the first arc surface section, the first curved surface section and the second curved surface section, which can effectively alleviate the impact of airflow on the volute tongue, reduce the flow separation of gas near the volute tongue, and effectively reduce the noise of the fan system without changing the impeller and the rotation speed.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the disclosure of the present application, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the disclosure of the present application.

[0028] Figure 1 is a schematic diagram of a volute structure provided in an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of another volute structure provided in an embodiment of the present application;

[0030] Figure 3 is a schematic diagram of another volute structure provided in an embodiment of the present application;

[0031] Figure 4 It is a design principle diagram of a volute tongue segment profile provided in an embodiment of the present application;

[0032] Figure 5 is a structural schematic diagram of a fan system provided in an embodiment of the present application;

[0033] Figure 6 is a structural schematic diagram of another fan system provided in an embodiment of the present application;

[0034] Figure 7 is a schematic diagram of the installation of a fan system provided in an embodiment of the present application;

[0035] Among them, the reference numerals in the figure correspond to: 11-first arc surface segment; 12-first curved surface segment; 13-second curved surface segment; 14-second arc surface segment; 15-helical surface segment; 16-first air outlet segment; 17-second air outlet segment; 18-third air outlet segment; 2-first side panel; 3-second side panel; 41-first air outlet; 42-second air outlet; 5-air inlet; 6-impeller; 61-impeller center plate; 62-vent; 7-motor bracket; 71-first support portion; 72-second support portion; 73-support foot; 74-guide portion. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] It should be noted that the "one embodiment" or "embodiment" referred to in the specification of the embodiment of the present application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present application. It should be understood that in the specification and claims of the embodiment of the present application and the above-mentioned drawings, the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, in the description of the present embodiment, unless otherwise specified, "plurality" means two or more. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system or product including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] When a numerical range is disclosed herein, the above range is deemed to be continuous and includes the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all sub-ranges included therein. For example, a specified range from "1 to 10" should be deemed to include any and all sub-ranges between a minimum of 1 and a maximum of 10. Exemplary sub-ranges of ranges 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0039] In order to make the purpose, technical solution and advantages disclosed in the embodiments of the present application more clearly understood, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and are not used to limit the embodiments of the present application.

[0040] Most of the existing integrated stoves' left and right air outlet solutions are centrifugal fans and T-shaped air duct modes, but the existing fan volute structure has large flow losses, low outlet wind speed, and uneven air volume distribution in the left and right ducts, resulting in large differences in speed at the same gear, high noise of the whole machine, low efficiency, and unable to meet the performance index requirements of left and right air outlets at the same time. There is still room for optimization in the volute and air duct structure. Therefore, the embodiments of the present application provide a volute structure, a fan system having the volute structure, and an integrated stove.

[0041] The following is combined with Figure 1-7 The technical solution in the embodiments of the present application is introduced.

[0042] See also Figure 1-7 A volute structure provided in an embodiment of the present application includes a volute enclosure, a first side plate 2 and a second side plate 3, wherein the volute enclosure is fixedly arranged between the first side plate 2 and the second side plate 3; the volute enclosure includes a volute tongue section, wherein the first side plate 2 and the second side plate 3 are asymmetric structures at the volute tongue section, and the profile of the volute tongue section is an airfoil profile; the volute tongue section includes a first circular arc surface section 11, a first curved surface section 12 and a second curved surface section 13, wherein one end of the first circular arc surface section 11 is connected to one end of the first curved surface section 12, and the other end of the first circular arc surface section 11 is connected to one end of the second curved surface section 13, and the first curved surface section 12 and the second curved surface section 13 are arranged opposite to each other.

[0043] In a specific embodiment, the volute enclosure is fixedly connected to the first side plate 2 and the second side plate 3 respectively. Specifically, in order to prevent airflow leakage and ensure the stability of the structure, the volute enclosure and the first side plate 2 and the second side plate 3 are connected by welding.

[0044] In practical applications, based on the above-mentioned settings of the first arc surface segment 11, the first curved surface segment 12 and the second curved surface segment 13, an asymmetric volute tongue structure imitating a wing is formed. The profile of the asymmetric volute tongue imitating a wing is the profile of the front arc segment (i.e., the profile of the connecting line between the first arc surface segment 11 and the first side panel 2, the second side panel 3) and the profile of the middle section of the wing (i.e., the profile of the connecting line between the first curved surface segment 12 and the second curved surface segment 13 and the first side panel 2, the second side panel 3 respectively), which can effectively alleviate the impact of the airflow on the volute tongue and reduce the flow separation of the gas near the volute tongue.

[0045] Optionally, the radius of the first arc is different from the radius of the second arc, and the vertical distance between the first curved surface segment 12 and the second curved surface segment 13 gradually increases from the first end to the second end; the first arc is the connecting line between the first circular arc segment 11 and the first side panel 2, and the second arc is the connecting line between the first circular arc segment 11 and the second side panel 3. The first end is the end of the first arc and the second arc where the arc with the smaller radius is located, and the second end is the end of the first arc and the second arc where the arc with the larger radius is located.

[0046] Specifically, the radius of the connecting line between the first curved surface segment 12 and the first side panel 2 and the second side panel 3 can be set according to actual application requirements, and the asymmetric volute tongue of the wing can be integrally formed, and its thickness gradually increases from the side panel with a smaller connecting line radius to the side panel with a larger connecting line radius.

[0047] In an optional embodiment, if Figure 2 As shown, the first distance is different from the second distance, and the first arc surface segment 11 is an inclined smoothly transitioned twisted surface; the first distance is the distance from the vertex A of the first arc to the vertical plane of the plane where the first side panel 2 is located, and the second distance is the distance from the vertex B of the second arc to the vertical plane.

[0048] Specifically, the first distance can be used to characterize the opening depth of the first side panel 2 at the worm tongue section, and the second distance can be used to characterize the opening depth of the second side panel 3 at the worm tongue section. The first distance is different from the second distance, that is, the opening depths of the first side panel 2 and the second side panel 3 at the worm tongue section are different. The first circular arc surface section 11 smoothly transitions between the first side panel 2 and the second side panel 3 to form an inclined twisted surface.

[0049] In practical applications, the volute tongue surface with an inclined structure and a different radius from the connecting arc between the two side plates can weaken the superposition effect of noises generated by unsteady forces of different phases, and effectively reduce the noise of the multi-blade centrifugal fan without changing the impeller 6 and the rotation speed, thereby improving the aerodynamic performance of the whole machine.

[0050] In some embodiments, Figure 2 As shown, the first side panel 2 and the second side panel 3 are relatively provided with air inlets 5, the angle α between the target line and the vertical plane of the plane where the first side panel 2 is located is 40 degrees to 50 degrees, the distance d from the intersection of the target line and the edge of the air inlet 5 to the vertex of the target line is 18mm to 23mm, the radius of the first arc and the radius of the second arc are 10mm to 20mm, which can ensure that no whistling sound is generated due to the small gap between the volute tongue and the outlet static pressure meets the requirements.

[0051] Specifically, the target connection line is a connection line between the center point of the air inlet 5 and the vertex of the target connection line, and the target connection line is a connection line between the first arc and the second arc with a shorter distance between the vertex and the vertical plane.

[0052] Optionally, the volute enclosure, the first side panel 2 and the second side panel 3 together form a wind cavity and a first air outlet 41, and the first air outlet 41 is connected to the wind cavity; the volute enclosure also includes a spiral surface segment 15 and a first air outlet 41 segment 16, the other end of the first curved surface segment 12 is connected to the first air outlet 41 segment 16, and the other end of the second curved surface segment 13 is connected to one end of the spiral surface segment 15.

[0053] In some embodiments, the volute enclosure, the first side panel 2 and the second side panel 3 together form a second air outlet 42, the second air outlet 42 is connected to the wind cavity, and the first air outlet 41 and the second air outlet 42 are arranged opposite to each other; the volute enclosure also includes a second arc surface segment 14 and a second air outlet 42 segment 17, one end of the second arc surface segment 14 is connected to the other end of the spiral surface segment 15, and the other end of the second arc surface segment 14 is connected to the second air outlet 42 segment 17, and the radius of the second arc surface segment 14 is 65mm-75mm.

[0054] Specifically, the volute enclosure also includes a third air outlet section 18, the first air outlet 41 section 16, the second air outlet 42 section 17 and the third air outlet section 18 can all be plane sections, the first air outlet 41 section 16, the first side panel 2, the second side panel 3 and the third air outlet section 18 together form the first air outlet 41, and the second air outlet 42 section 17, the first side panel 2, the second side panel 3 and the third air outlet section 18 together form the second air outlet 42. At the transition section of the second air outlet 42, the volute is a rounded structure with a radius of 65mm-75mm, which can effectively balance the air volume of the two air outlets, so that the air outlet performance of the two air outlets is close at the same gear.

[0055] In an optional embodiment, the radii of the first curve and the second curve are different, the profiles of the first curve and the third curve are the same, and the profiles of the second curve and the fourth curve are the same; the first curve is a connecting line between the first curved surface segment 12 and the first side panel 2, the second curve is a connecting line between the second curved surface segment 13 and the first side panel 2, the third curve is a connecting line between the first curved surface segment 12 and the second side panel 3, and the fourth curve is a connecting line between the second curved surface segment 13 and the second side panel 3.

[0056] In practical applications, on the same side plate, the radii of the upper and lower airfoil midsection profiles corresponding to the volute tongue are different; on different side plates, the upper airfoil midsection profiles and the lower airfoil midsection profiles corresponding to the volute tongue are the same.

[0057] An embodiment of the present application also provides a fan system, including a motor (not shown), an impeller 6 and the above-mentioned volute structure, the volute enclosure, the first side plate 2 and the second side plate 3 together form a wind cavity, and the motor and the impeller 6 are arranged in the wind cavity; the impeller 6 includes an impeller center plate 61, and the impeller center plate 61 is provided with at least two ventilation holes 62, and the at least two ventilation holes 62 are evenly distributed on the impeller center plate 61.

[0058] Specifically, the center of the impeller 6 is at the same position as the center of the air inlet 5 on the side panel, and each air vent 62 can be a circular through hole, a fan-shaped through hole or a special-shaped through hole, etc. Specifically, when each air vent 62 is a fan-shaped through hole, the outer edge and the inner edge of the fan-shaped through hole are both arc-shaped, and the air circulation area is large. The intake air flow enters the wind cavity through the air vent 62. The above-mentioned air vent 62 can also be used for pressurization. Multiple air vents 62 are evenly distributed along the circumference of the impeller center disk 61, which can increase the air intake area on the motor side, thereby improving the aerodynamic performance of the whole machine.

[0059] In some embodiments, the above-mentioned fan system also includes a motor bracket 7, which is arranged at the air inlet 5 on the first side panel 2, and the motor is fixedly connected to the motor bracket 7; the motor bracket 7 includes a first support portion 71, a second support portion 72 and at least two support legs 73, the first support portion 71 is fixedly connected to the first side panel 2, the second support portion 72 is located in the wind cavity, one end of each support leg 73 is fixedly connected to the first support portion 71, and the other end of each support leg 73 is fixedly connected to the second support portion 72, and the motor is fixedly connected to the second support portion 72; a guide portion 74 is arranged on the first support portion 71.

[0060] Specifically, the first support portion 71 and the second support portion 72 are both annular structures, and the center position of the circle is the same, and the motor is arranged through the circular area formed by the inner edge of the second support portion 72. A plurality of guide portions 74 may be arranged on the first support portion 71, and the plurality of guide portions 74 are evenly distributed on the first support portion 71, and the guide portions 74 protrude toward the outer side of the volute, and the shape of the guide portion 74 is a sector, and its outer edge is an arc, and the center of the circle where the arc is located is at the same position as the center of the first support portion 71 and the second support portion 72.

[0061] In the above embodiment, by setting the guide portion 74 to a large-angle arc transition and protruding toward the outside of the volute, the flow field of the rear airflow can be made to avoid backflow, so as to avoid the unstable airflow running and affecting the sound quality.

[0062] An embodiment of the present application also provides an integrated stove, comprising the above-mentioned fan system.

[0063] Specifically, Figure 7 As shown, the air outlet of the centrifugal fan is connected to the air outlet seat arranged on the integrated stove shell, and the installation position of the centrifugal fan in the integrated stove can be set according to actual application requirements. For example, when the air duct structure of the integrated stove is a bottom-mounted type, the centrifugal fan can be fixed horizontally in the integrated stove. When the air duct structure of the integrated stove is a back-mounted type, the centrifugal fan can be fixed vertically in the integrated stove, and can also be fixed at a preset tilt angle in the integrated stove.

[0064] It can be seen from the technical solutions provided in the above embodiments of this specification that the volute structure in this specification includes a volute enclosure, a first side panel and a second side panel, and the volute enclosure is fixedly arranged between the first side panel and the second side panel; the volute enclosure includes a volute tongue section, and the first side panel and the second side panel are asymmetric structures at the volute tongue section, and the profile of the volute tongue section is an airfoil profile; the volute tongue section includes a first arc surface section, a first curved surface section and a second curved surface section, one end of the first arc surface section is connected to one end of the first curved surface section, and the other end of the first arc surface section is connected to one end of the second curved surface section, and the first curved surface section and the second curved surface section are arranged relative to each other, so that an asymmetric volute tongue structure with an airfoil profile is formed by the first arc surface section, the first curved surface section and the second curved surface section, which can effectively alleviate the impact of the airflow on the volute tongue, reduce the flow separation of the gas near the volute tongue, and effectively reduce the noise of the fan system without changing the impeller and the rotation speed.

[0065] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0066] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A volute structure, characterized in that: It includes a volute enclosure, a first side plate and a second side plate, wherein the volute enclosure is fixedly arranged between the first side plate and the second side plate; The volute enclosure includes a volute tongue section, the first side plate and the second side plate are asymmetrical structures at the volute tongue section, and the profile of the volute tongue section is an airfoil profile; The volute tongue segment includes a first arc surface segment, a first curved surface segment and a second curved surface segment, one end of the first arc surface segment is connected to one end of the first curved surface segment, the other end of the first arc surface segment is connected to one end of the second curved surface segment, and the first curved surface segment and the second curved surface segment are arranged opposite to each other.

2. The volute structure according to claim 1, characterized in that: The radius of the first arc is different from the radius of the second arc, and the vertical distance between the first curved surface segment and the second curved surface segment gradually increases from the first end to the second end; The first arc line is a connecting line between the first arc surface segment and the first side panel, the second arc line is a connecting line between the first arc surface segment and the second side panel, the first end is an end of the first arc line and the second arc line where the arc with a smaller radius is located, and the second end is an end of the first arc line and the second arc line where the arc with a larger radius is located.

3. The volute structure according to claim 2, characterized in that: The first distance is different from the second distance, and the first arc surface segment is an inclined smoothly transitioned twisted surface; The first distance is the distance from the vertex of the first arc line to the vertical plane of the plane where the first side plate is located, and the second distance is the distance from the vertex of the second arc line to the vertical plane.

4. The volute structure according to claim 2, characterized in that: The first side panel and the second side panel are provided with air inlets opposite to each other, the angle between the target line and the vertical plane of the plane where the first side panel is located is 40 degrees to 50 degrees, the distance between the intersection of the target line and the edge of the air inlet and the vertex of the target line is 18 mm to 23 mm, and the radius of the first arc and the radius of the second arc are 10 mm to 20 mm; The target connection line is a connection line between the center point of the air inlet and the vertex of the target connection line, and the target connection line is a connection line between the first arc and the second arc with a shorter distance between the vertex and the vertical plane.

5. The volute structure according to claim 1, characterized in that: The volute enclosure, the first side plate and the second side plate together form an air cavity and a first air outlet, and the first air outlet is connected to the air cavity; The volute enclosure further includes a spiral surface segment and a first air outlet segment, the other end of the first curved surface segment is connected to the first air outlet segment, and the other end of the second curved surface segment is connected to one end of the spiral surface segment.

6. The volute structure according to claim 5, characterized in that: The volute enclosure, the first side plate and the second side plate together form a second air outlet, the second air outlet is connected to the air cavity, and the first air outlet is arranged opposite to the second air outlet; The volute enclosure also includes a second arc surface segment and a second air outlet segment, one end of the second arc surface segment is connected to the other end of the spiral surface segment, the other end of the second arc surface segment is connected to the second air outlet segment, and the radius of the second arc surface segment is 65mm-75mm.

7. The volute structure according to claim 1, characterized in that: The first curve and the second curve have different radii, the first curve and the third curve have the same profile, and the second curve and the fourth curve have the same profile; The first curve is a connecting line between the first curved surface segment and the first side panel, the second curve is a connecting line between the second curved surface segment and the first side panel, the third curve is a connecting line between the first curved surface segment and the second side panel, and the fourth curve is a connecting line between the second curved surface segment and the second side panel.

8. A fan system, characterized in that: It comprises a motor, an impeller and a volute structure according to any one of claims 1 to 7, wherein the volute enclosure, the first side plate and the second side plate together form an air cavity, and the motor and the impeller are arranged in the air cavity; The impeller comprises an impeller center disk, and at least two vent holes are arranged on the impeller center disk, and the at least two vent holes are evenly distributed on the impeller center disk.

9. The fan system according to claim 8, characterized in that: It also includes a motor bracket, which is arranged at the air inlet on the first side panel, and the motor is fixedly connected to the motor bracket; The motor bracket includes a first supporting portion, a second supporting portion and at least two supporting legs, the first supporting portion is fixedly connected to the first side panel, the second supporting portion is located in the wind cavity, one end of each supporting leg is fixedly connected to the first supporting portion, the other end of each supporting leg is fixedly connected to the second supporting portion, and the motor is fixedly connected to the second supporting portion; a guide portion is provided on the first supporting portion.

10. An integrated stove, characterized in that: Comprising the fan system as claimed in claim 8 or 9.

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