Volute fan and integrated cooker

Abstract

The utility model belongs to the technical field of integrated cookers, and discloses a volute fan and an integrated cook.The volute fan comprises a shell, an impeller, a flow guide ring and a rectifying net, the impeller is installed in the shell, a first air inlet is formed in the side, in the axial direction of the impeller, of the shell, the flow guide ring is installed at the first air inlet and is coaxial with the impeller, and the rectifying net is arranged in the shell. The shell is arranged on the periphery of the flow guide ring in a sleeving mode through the first air inlet, the flow guide ring is arranged on the periphery of the rectification net in a sleeving mode, the rectification net is of a net structure and is coaxial with the impeller, airflow can penetrate through the rectification net in the process of entering the volute fan through the first air inlet, and the rectification net can rectify the airflow so as to eliminate vortexes in the airflow; and the airflow speed and the pressure gradient of the airflow penetrating through the rectification net to enter the volute fan can be rapidly and evenly changed, so that vortex noise generated in the working process of the volute fan is reduced, noise reduction of the volute fan is achieved, and then the use experience of a user is improved.

Description

Technical Field

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

[0002] Integrated stove, also known as environmentally friendly stove or integrated environmentally friendly stove, is a kitchen appliance that integrates multiple functions such as smoke extractor, gas stove, disinfection cabinet, storage cabinet, etc. It has the advantages of saving space, good fume extraction effect, energy saving, low consumption and environmental protection.

[0003] Among them, the smoke extractor is used to extract the oil smoke during the cooking process, so as to avoid affecting the health of the user and reduce the oil smoke attached to the kitchen utensils and kitchen walls. At present, the smoke extractor generally includes a negative pressure box fan assembly, which is used to quickly extract the oil smoke and discharge it outdoors during the cooking process. Specifically, the negative pressure box fan assembly in the prior art generally includes a negative pressure box and a volute fan, the volute fan is installed in the negative pressure box, and the negative pressure box is provided with an air inlet and an air outlet. The air inlet is connected to the smoke outlet on the head of the integrated stove, and the air outlet is connected to the air outlet seat, and the end of the air outlet seat away from the air outlet is connected to the outside. In the prior art, an air path for circulating oil smoke is formed between the box body of the negative pressure box and the volute fan. During the circulation of oil smoke along the air path, the air flow will generate vortices at a position close to the air inlet of the volute fan, which will cause the volute fan to generate large vortex noise during operation, thereby affecting the user's experience.

[0004] Therefore, the above problems need to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a volute fan and an integrated stove, so as to solve the problem that the volute fan generates large eddy current noise during operation, thereby affecting the user's experience.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, the utility model provides a volute blower, comprising a casing, an impeller and a guide ring, the impeller being installed inside the casing, the casing being provided with a first air inlet on one side along the axial direction of the impeller, the guide ring being installed at the first air inlet and being coaxially arranged with the impeller, the casing being sleeved on the outer periphery of the guide ring through the first air inlet, the volute blower also comprising a rectifying net, the guide ring being sleeved on the outer periphery of the rectifying net, the rectifying net being in a mesh structure, and being coaxially arranged with the impeller.

[0008] Preferably, the rectifying net protrudes from a side close to the impeller to a side away from the impeller, and a side of the rectifying net away from the impeller extends out of the guide ring.

[0009] Preferably, the casing is provided with a second air inlet along the side of the impeller axially away from the guide ring, and the volute fan also includes a mounting plate and a motor, the mounting plate is installed at the second air inlet and is coaxially arranged with the impeller, the casing is sleeved on the outer periphery of the mounting plate through the second air inlet, the mounting plate is sleeved on the outer periphery of the motor, the impeller surrounds the outer periphery of the motor, the motor is configured to drive the impeller to rotate, and a plurality of air inlet holes are provided on the mounting plate, and the plurality of air inlet holes are arranged around the axis of the impeller.

[0010] Preferably, the impeller comprises a plurality of blades, the plurality of blades are evenly arranged along the circumferential direction, the plurality of blades together form an air inlet cavity, the mounting plate extends into the air inlet cavity, and the air inlet hole is located in the air inlet cavity.

[0011] Preferably, the impeller includes a plurality of blades, the plurality of blades are evenly arranged in the circumferential direction, the plurality of blades together form an air inlet chamber, the impeller also includes a first mounting ring and a second mounting ring arranged opposite to each other, the blades are installed between the first mounting ring and the second mounting ring, the guide ring passes through the first mounting ring and extends into the air inlet chamber, and the first mounting ring is sleeved on the outer circumference of the guide ring.

[0012] Preferably, the guide ring is in a truncated cone shape, and the diameter of the cross section of the guide ring gradually decreases from the end located outside the air inlet cavity to the end extending into the air inlet cavity, and the cone angle of the guide ring is greater than or equal to 4 degrees and less than or equal to 6 degrees.

[0013] Preferably, a distance between the first air inlet and the impeller is greater than or equal to 9 mm and less than or equal to 11 mm.

[0014] Preferably, the shell includes a surrounding plate, a first side plate and a second side plate, the first side plate and the second side plate are arranged at intervals along the axial direction of the impeller, the surrounding plate is installed between the first side plate and the second side plate, and is arranged in a spiral shape around the outer circumference of the impeller, an air duct is formed between the surrounding plate and the impeller, the surrounding plate is disconnected at both ends to form an air outlet, a volute tongue is provided at the air outlet, a gap between the top end of the volute tongue and the outer circumference of the impeller is greater than or equal to 17 mm and less than or equal to 19 mm, and the radius of the arc at the top end of the volute tongue is greater than or equal to 12 mm and less than or equal to 13.5 mm.

[0015] Preferably, a connecting flange is installed on the outer side of the enclosure, and an air outlet hole is arranged on the connecting flange, and the air outlet hole is connected with the air outlet. The side of the connecting flange away from the enclosure can be connected with the outside through the air outlet seat, and the hole wall of the air outlet is bent toward the side close to the air outlet to form a first folded edge and a second folded edge, the first folded edge and the second folded edge are arranged opposite to each other, the first folded edge is inserted between the enclosure and the volute tongue, and the second folded edge abuts against the outer wall of the enclosure.

[0016] Another aspect of the utility model provides an integrated stove, comprising the volute fan as described above.

[0017] Beneficial effects of the present invention: the volute fan in the present invention includes a rectifying net, and a guide ring is arranged on the outer periphery of the rectifying net. The rectifying net has a mesh structure and is coaxially arranged with the impeller, that is, the airflow will pass through the rectifying net in the process of entering the interior of the volute fan through the first air inlet. The rectifying net can rectify the airflow to eliminate vortices in the airflow, and make the airflow velocity and pressure gradient of the airflow passing through the rectifying net and entering the interior of the volute fan quickly become uniform, thereby reducing the eddy noise generated by the volute fan during operation, so as to achieve noise reduction of the volute fan and thus enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the volute fan, the air outlet seat and the negative pressure box in the embodiment of the utility model;

[0019] Figure 2 It is an exploded view of the volute fan, the air outlet seat and the negative pressure box in the embodiment of the utility model;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 It is a cross-sectional view of the volute fan, the air outlet seat and the negative pressure box along the section passing through the impeller axis in the embodiment of the utility model;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 6 yes Figure 4 A partial enlarged view of point C in the middle;

[0024] Figure 7 It is an exploded view of the volute fan in the embodiment of the utility model;

[0025] Figure 8 It is an exploded view of the housing, the mounting plate, the volute tongue and the connecting flange in the embodiment of the utility model.

[0026] In the figure:

[0027] 110, housing; 111, first air inlet; 112, second air inlet; 113, enclosure; 1131, air outlet; 114, first side plate; 1141, support frame; 1142, cushion; 115, second side plate; 116, soundproof cover; 120, impeller; 121, blade; 122, air inlet cavity; 123, first mounting ring; 124, second mounting ring; 130, guide ring; 140, rectifier net; 150, mounting plate; 151, air inlet; 160, motor; 170, volute tongue; 180, connecting flange; 181, air outlet; 182, first folding edge;

[0028] 200, outlet seat;

[0029] 300. Negative pressure box; 310. Air inlet; 320. Air outlet; 330. Box body. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The present embodiment provides an integrated stove, which includes an integrated stove main unit, a volute fan and a negative pressure box. A stove top and an integrated stove head are installed on the integrated stove main unit. A smoke intake port is provided on the integrated stove head, and the volute fan is installed in the negative pressure box.

[0035] See also Figures 1 to 8 The negative pressure box 300 is provided with an air inlet 310 and an air outlet 320. The air inlet 310 is connected to the smoke outlet, and the air outlet 320 is connected to the outside through the air outlet seat 200. A wind path for circulating oil smoke is formed between the volute fan and the box body 330 of the negative pressure box 300. The volute fan includes a housing 110, an impeller 120 and a guide ring 130. The impeller 120 is installed inside the housing 110. The impeller 120 includes a plurality of blades 121. The plurality of blades 121 are evenly arranged along the circumferential direction. The plurality of blades 121 are together formed to form An air inlet cavity 122, the shell 110 is constructed around the outer periphery of the impeller 120 and forms an air duct between the shell 110 and the impeller 120, a first air inlet 111 is provided on the shell 110 along one side of the axial direction of the impeller 120, the guide ring 130 is installed at the first air inlet 111 and is coaxially arranged with the impeller 120, the shell 110 is sleeved on the outer periphery of the guide ring 130 through the first air inlet 111, and an air outlet 1131 is also provided on the shell 110, the air outlet 1131 is connected to the air duct, and the air outlet 1131 is also connected to the air outlet 320.

[0036] It is worth noting that, in the present embodiment, the blade 121 is a forward blade, and the forward inclination angle of the blade 121 is greater than or equal to 25 degrees and less than or equal to 30 degrees, thereby ensuring the aerodynamic performance of the volute blower.

[0037] During the operation of the integrated stove, the impeller 120 rotates to generate suction to draw away the oil smoke through the suction port. The oil smoke enters the negative pressure box 300 through the air inlet 310 and flows along the wind path to a position close to the first air inlet 111. Thereafter, the oil smoke is sucked into the air inlet chamber 122 through the first air inlet 111 and enters the air duct through the gap between two adjacent blades 121. The oil smoke then flows to the air outlet seat 200 through the air outlet 1131 and is discharged outdoors through the air outlet seat 200.

[0038] Among them, the guide ring 130 is used to guide the airflow so that the oil smoke can smoothly enter the air inlet chamber 122. When the oil smoke flows through the guide ring 130, the airflow will generate vortices near the first air inlet 111 due to the uneven flow path of the airflow.

[0039] To solve the vortex problem, the volute fan in this embodiment also includes a rectifying mesh 140. The guide ring 130 is sleeved on the outer periphery of the rectifying mesh 140. The rectifying mesh 140 has a mesh structure and is coaxially arranged with the impeller 120. That is, the airflow will pass through the rectifying mesh 140 in the process of entering the interior of the volute fan through the first air inlet 111. The rectifying mesh 140 can rectify the airflow to eliminate vortices in the airflow, and make the airflow velocity and pressure gradient of the airflow passing through the rectifying mesh 140 and entering the interior of the volute fan quickly become uniform, thereby reducing the vortex noise generated by the volute fan during operation, so as to achieve noise reduction of the volute fan and thus enhance the user experience.

[0040] It is worth noting that in this embodiment, the negative pressure box 300 and the volute fan are installed outside the integrated stove main unit, so as to be away from the stove of the integrated stove, thereby preventing the noise generated by the volute fan from affecting the user's experience. Of course, in other optional embodiments, the negative pressure box 300 and the volute fan can also be integrated into the integrated stove main unit, and this embodiment does not make specific restrictions on this.

[0041] Based on the above, the airflow will generate a vortex at a position close to the first air inlet 111, that is, the area on the outside of the volute fan close to the first air inlet 111 is a vortex zone. In the present embodiment, the rectifying net 140 protrudes from the side close to the impeller 120 to the side away from the impeller 120. Specifically, the rectifying net 140 extends out of the guide ring 130 on the side away from the impeller 120, and the outer diameter of the cross-section of the rectifying net 140 gradually decreases from the side close to the impeller 120 to the side away from the impeller 120, thereby reducing the vortex zone, that is, the airflow flowing along the wind path can pass through the rectifying net 140 more quickly, thereby weakening the growth of the vortex and reducing the chance of mutual collision between vortices, thereby further reducing the vortex noise generated by the volute fan during operation, so as to further achieve noise reduction of the volute fan, thereby further improving the user experience.

[0042] In addition, in this embodiment, the distance between the first air inlet 111 and the impeller 120 is greater than or equal to 9 mm and less than or equal to 11 mm, thereby further reducing the eddy current zone, and further reducing the eddy current noise generated by the volute fan during operation, so as to further achieve noise reduction of the volute fan, and further enhance the user experience.

[0043] In this embodiment, the impeller 120 also includes a first mounting ring 123 and a second mounting ring 124 that are relatively arranged, and the blade 121 is installed between the first mounting ring 123 and the second mounting ring 124. The guide ring 130 passes through the first mounting ring 123 and extends into the air inlet chamber 122. The first mounting ring 123 is sleeved on the outer periphery of the guide ring 130 so that the airflow passing through the rectifying net 140 can completely enter the air inlet chamber 122 without leaking between the guide ring 130 and the impeller 120, thereby avoiding the casing 110 of the volute fan from generating noise due to the impact of the leaked airflow. That is, this embodiment can further achieve noise reduction of the volute fan, thereby further improving the user experience.

[0044] Furthermore, the guide ring 130 is in a truncated cone shape, and the diameter of the cross section of the guide ring 130 gradually decreases from the end located outside the air inlet chamber 122 to the end extending into the air inlet chamber 122, and the cone angle of the guide ring 130 is greater than or equal to 4 degrees and less than or equal to 6 degrees, thereby improving the guide effect of the guide ring 130, and the cross-sectional area of ​​the side of the guide ring 130 away from the impeller 120 is larger, thereby further reducing the vortex zone, and further reducing the vortex noise generated by the volute fan during operation, so as to further achieve noise reduction of the volute fan, and further enhance the user experience.

[0045] Preferably, a second air inlet 112 is provided on the side of the shell 110 axially away from the guide ring 130 of the impeller 120, and the volute fan also includes a mounting plate 150 and a motor 160. The mounting plate 150 is installed at the second air inlet 112 and is coaxially arranged with the impeller 120. The shell 110 is sleeved on the outer periphery of the mounting plate 150 through the second air inlet 112, and the mounting plate 150 is sleeved on the outer periphery of the motor 160. The impeller 120 surrounds the outer periphery of the motor 160, and the motor 160 is configured to drive the impeller 120 to rotate. A plurality of air inlet holes 151 are provided on the mounting plate 150, and the plurality of air inlet holes 151 are arranged around the axis of the impeller 120. The oil smoke sucked into the negative pressure box 300 can also enter the interior of the impeller 120 through the second air inlet 112 and the air inlet holes 151, that is, the volute fan in this embodiment has a two-way air intake, so that the oil smoke can be drawn away and discharged outdoors more quickly.

[0046] Moreover, the area on the mounting plate 150 located at the periphery of the air inlet hole 151 is a solid structure. Therefore, when the airflow passes through the air inlet hole 151 and enters the interior of the impeller 120, the area on the mounting plate 150 located at the periphery of the air inlet hole 151 can rectify the airflow to eliminate the vortex in the airflow, thereby further reducing the eddy noise generated by the volute fan during operation, so as to further achieve noise reduction of the volute fan, thereby further improving the user experience.

[0047] Furthermore, the mounting plate 150 extends into the air inlet cavity 122, and the air inlet hole 151 is located in the air inlet cavity 122, so that the airflow passing through the mounting plate 150 can completely enter the air inlet cavity 122 without leaking between the mounting plate 150 and the impeller 120, thereby further preventing the casing 110 of the volute fan from generating noise due to the impact of the leaked airflow.

[0048] Specifically, in this embodiment, the second mounting ring 124 is sleeved on the outer circumference of the mounting plate 150 .

[0049] Based on the contents mentioned above, in the present embodiment, the shell 110 includes a surrounding plate 113, a first side plate 114 and a second side plate 115. The first side plate 114 and the second side plate 115 are arranged at intervals along the axial direction of the impeller 120. The surrounding plate 113 is installed between the first side plate 114 and the second side plate 115, and is arranged in a spiral shape around the outer periphery of the impeller 120. An air duct is formed between the surrounding plate 113 and the impeller 120. The surrounding plate 113 is disconnected at both ends to form an air outlet 1131. A volute tongue 170 is provided at the air outlet 1131. It can be understood that the specific structure of the volute tongue 170, the setting position of the volute tongue 170 and the working principle are all existing technologies. Therefore, they are not described in detail in the present embodiment.

[0050] When the airflow and the blade 121 make relative motion, the velocity and pressure in the airflow wake at the trailing edge of the blade 121 are both lower than those in the mainstream area, so that the airflow velocity and pressure distribution behind the cascade are uneven. During the rotation of this uneven airflow, due to the presence of the volute tongue 170 at the airflow outlet, this unsteady flow interacts with the volute tongue 170 and generates noise. The closer the volute tongue 170 is to the outer peripheral distance of the impeller 120, the greater the noise. In this embodiment, the gap between the top of the volute tongue 170 and the outer circumference of the impeller 120 is greater than or equal to 17 mm and less than or equal to 19 mm, and the radius of the top circular arc of the volute tongue 170 is greater than or equal to 12 mm and less than or equal to 13.5 mm. That is, in this embodiment, by designing the gap between the top of the volute tongue 170 and the outer circumference of the impeller 120 and the radius of the top circular arc of the volute tongue 170, the noise generated by the interaction between the airflow and the volute tongue 170 can be reduced, thereby further improving the user experience.

[0051] Furthermore, a connecting flange 180 is installed on the outer side of the enclosure 113, and an air outlet hole 181 is provided on the connecting flange 180. The air outlet hole 181 is connected with the air outlet 1131, so that the air duct is connected with the air outlet 1131 to form a channel for the flow of oil smoke. The side of the connecting flange 180 away from the enclosure 113 can be connected with the outside through the air outlet seat 200.

[0052] The hole wall of the air outlet 181 is bent toward the side close to the air outlet 1131 to form a first folded edge 182 and a second folded edge (not shown in the figure), the first folded edge 182 and the second folded edge are arranged opposite to each other, the first folded edge 182 is inserted between the enclosure 113 and the volute tongue 170, and the second folded edge abuts against the outer wall of the enclosure 113. In this embodiment, the shell 110 also includes a soundproof cover 116, which is installed between the first side plate 114 and the second side plate 115 and is arranged around the outer periphery of the enclosure 113. The second folded edge is inserted between the first side plate 114 and the second side plate 115. Between the enclosure 113 and the soundproof cover 116, on the one hand, in this embodiment, the first folded edge 182 and the second folded edge are used to close the channel for the flow of oil smoke mentioned above, so as to prevent the oil smoke from leaking to the outside of the enclosure 113, and further prevent the box body 330 of the negative pressure box 300 from generating noise due to the impact of airflow. On the other hand, in this embodiment, it can ensure that the air duct formed between the enclosure 113 and the impeller 120 is unobstructed, so as to avoid affecting the flow of oil smoke in the air duct, and further reduce the noise generated during the operation of the volute blower.

[0053] In addition, it is worth mentioning that in the present embodiment, a support frame 1141 is installed on the side of the first side plate 114 facing away from the second side plate 115 and a buffer pad 1142 is installed on the support frame 1141. The side of the first side plate 114 facing away from the second side plate 115 and the side of the second side plate 115 facing away from the first side plate 114 are both in contact with the inner wall of the box body 330. Since the buffer pad 1142 is installed between the first side plate 114 and the box body 330 and between the second side plate 115 and the box body 330, the present embodiment can buffer the vibration of the volute fan during operation, thereby further reducing the noise.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A volute fan, comprising a casing (110), an impeller (120) and a guide ring (130), wherein the impeller (120) is installed inside the casing (110), the casing (110) is provided with a first air inlet (111) on one side along the axial direction of the impeller (120), the guide ring (130) is installed at the first air inlet (111) and is coaxially arranged with the impeller (120), the casing (110) is sleeved on the outer periphery of the guide ring (130) through the first air inlet (111), and is characterized in that: The volute fan further comprises a rectifying net (140), the guide ring (130) is sleeved on the outer periphery of the rectifying net (140), the rectifying net (140) is in a mesh structure, and is coaxially arranged with the impeller (120).

2. The volute blower according to claim 1, characterized in that: The rectifying net (140) protrudes from a side close to the impeller (120) to a side away from the impeller (120), and a side of the rectifying net (140) away from the impeller (120) extends out of the guide ring (130).

3. The volute fan according to claim 1, characterized in that: The housing (110) is provided with a second air inlet (112) along a side of the impeller (120) axially away from the guide ring (130). The volute fan further comprises a mounting plate (150) and a motor (160). The mounting plate (150) is mounted at the second air inlet (112) and is coaxially arranged with the impeller (120). The housing (110) is sleeved on the outer periphery of the mounting plate (150) through the second air inlet (112). The mounting plate (150) is sleeved on the outer periphery of the motor (160). The impeller (120) surrounds the outer periphery of the motor (160). The motor (160) is configured to drive the impeller (120) to rotate. A plurality of air inlet holes (151) are provided on the mounting plate (150). The plurality of air inlet holes (151) are arranged around the axis of the impeller (120).

4. The volute fan according to claim 3, characterized in that: The impeller (120) comprises a plurality of blades (121), the plurality of blades (121) are evenly arranged in a circumferential direction, the plurality of blades (121) together surround an air inlet cavity (122), the mounting plate (150) extends into the air inlet cavity (122), and the air inlet hole (151) is located in the air inlet cavity (122).

5. The volute blower according to claim 1, characterized in that: The impeller (120) comprises a plurality of blades (121), the plurality of blades (121) are evenly arranged in a circumferential direction, and the plurality of blades (121) together surround an air inlet chamber (122). The impeller (120) further comprises a first mounting ring (123) and a second mounting ring (124) which are arranged opposite to each other, the blades (121) are mounted between the first mounting ring (123) and the second mounting ring (124), the guide ring (130) passes through the first mounting ring (123) and extends into the air inlet chamber (122), and the first mounting ring (123) is sleeved on the outer circumference of the guide ring (130).

6. The volute blower according to claim 5, characterized in that: The guide ring (130) is in a truncated cone shape, and the diameter of the cross section of the guide ring (130) gradually decreases from an end located outside the air inlet cavity (122) to an end extending into the air inlet cavity (122), and the cone angle of the guide ring (130) is greater than or equal to 4 degrees and less than or equal to 6 degrees.

7. The volute blower according to claim 1, characterized in that: The distance between the first air inlet (111) and the impeller (120) is greater than or equal to 9 mm and less than or equal to 11 mm.

8. The volute blower according to claim 1, characterized in that: The housing (110) comprises a surrounding plate (113), a first side plate (114) and a second side plate (115); the first side plate (114) and the second side plate (115) are arranged at intervals along the axial direction of the impeller (120); the surrounding plate (113) is installed between the first side plate (114) and the second side plate (115), and is arranged in a spiral shape around the outer circumference of the impeller (120); an air duct is formed between the surrounding plate (113) and the impeller (120); the surrounding plate (113) is disconnected at both ends to form an air outlet (1131); a volute tongue (170) is provided at the air outlet (1131); a gap between the top end of the volute tongue (170) and the outer circumference of the impeller (120) is greater than or equal to 17 mm and less than or equal to 19 mm; and a radius of a circular arc at the top end of the volute tongue (170) is greater than or equal to 12 mm and less than or equal to 13.5 mm.

9. The volute blower according to claim 8, characterized in that: A connecting flange (180) is installed on the outer side of the enclosure (113), and an air outlet hole (181) is arranged on the connecting flange (180), and the air outlet hole (181) is communicated with the air outlet (1131). The side of the connecting flange (180) away from the enclosure (113) can be communicated with the outside through the air outlet seat (200), and the hole wall of the air outlet hole (181) is bent toward the side close to the air outlet (1131) to form a first folded edge (182) and a second folded edge, and the first folded edge (182) and the second folded edge are arranged opposite to each other, and the first folded edge (182) is inserted between the enclosure (113) and the volute tongue (170), and the second folded edge abuts against the outer wall of the enclosure (113).

10. Integrated stove, characterized in that: It comprises a volute blower as described in any one of claims 1 to 9.

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