INSTALLATION OF VOLUTE AND AUXILIARY FAN THAT USES THE SAME
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- ZHONGSHAN BROAD OCEAN
- Filing Date
- 2021-12-07
- Publication Date
- 2026-05-19
AI Technical Summary
The conventional exhaust fan volute structure faces challenges in complex injection molding and high production costs due to the arrangement of inner and outer pipes, making it difficult to manufacture and increasing costs.
The volute assembly is redesigned with a single exhaust conduit comprising three parts connected sequentially, where the inner diameter increases gradually, eliminating the need for inner and outer pipes, and incorporates a drainage system and sealing mechanism to reduce manufacturing complexity and costs.
This redesign simplifies injection molding, reduces production costs, maintains air outlet size compatibility, and minimizes airflow loss and noise by gradually varying wind speed and pressure, while effectively managing condensate drainage.
Smart Images
Figure MX434527B0 
Figure MX434527B1
Abstract
Description
INSTALLATION OF VOLUTE AND AUXILIARY FAN THAT USES THE SAME Field of Invention The exhibition refers to a scroll installation and a vacuum fan that the same. Background of the Invention A conventional exhaust fan includes a volute assembly, a motor, a wind wheel, and a mounting bracket. The wind wheel is mounted within the volute assembly, the motor is mounted to the volute assembly via the mounting bracket, and the front end of the motor's rotating shaft extends into the volute assembly's inner cavity and engages with the wind wheel. The volute assembly includes a volute and a cover plate positioned at the bottom of the volute. The volute and cover plate form an inner cavity to receive the wind wheel. The cover plate is provided with an air inlet. One side of the volute extends outward from the exhaust pipe, forming an air outlet at the end of the exhaust pipe. The exhaust pipe includes an inner and an outer pipe.The inner pipe connects to the side wall of the volute, forming a water storage cavity between the inner and outer pipes. The outer pipe has a drain hole that connects to this water storage cavity. An adapter is positioned between the outer and inner pipes, and a sealing ring is placed between them. The inner and outer pipes are connected by an adapter. A hose clamp is located around the periphery of the outer pipe, and the outer pipe, sealing ring, and adapter are locked together through the hose clamp. However, this arrangement of the inner and outer pipes makes injection molding of the scroll more difficult and increases production costs. Summary of the Invention One objective of the exhibit is to provide a scroll installation and a suction fan comprising the same, to solve the problems of complex injection molding and the high cost of the conventional scroll structure. To achieve the above objective, the following technical solutions are adopted. A volute installation is provided comprising a volute and a cover plate. The volute comprises a cavity. The cover plate is disposed in the volute and covers the cavity. The cover plate comprises an air inlet; the volute comprises an exhaust duct; the exhaust duct comprises an air outlet; the exhaust duct comprises a first part, a second part, and a third part connected sequentially in that order; the first part is directly connected to the volute; the air outlet is disposed in the third part; and the inside diameter DI of the second part increases in the direction from the first part to the third part. The third part comprises an inner wall provided with an annular flange; and an inner diameter ZL LCLn / LZnZ / E / YILI -3D3 of the annular flange is greater than the maximum inner diameter of the second part. The third part comprises an outer wall provided with a first flange, a second flange, and a locating groove disposed between the first flange and the second flange; the first flange is disposed at one end of the third part and surrounds the air outlet; the third part further comprises a slit extending from the first flange and the second flange. At least one drainage hole is provided at the joint between the second and third parts. The inner wall of the second part is sunken towards at least one drainage hole to form a guide channel. One side of the guide channel that faces the air outlet is provided with a third flange to prevent water from entering the first part. Also provided is a suction fan comprising the aforementioned volute installation, a motor comprising a rotating shaft and a wind blade; the front end of the rotating shaft of the motor extends into the cavity of the volute installation and connects directly to the wind blade. The third part is provided with a conversion interface, and a sealing ring is disposed between the conversion interface and the third part; a hose clamp is disposed in the locating slot of the third part; and the third part, the sealing ring and the conversion interface are interlocked by the hose clamp. -4The third part comprises an inner wall provided with an annular flange; an inner diameter D3 of the annular flange, a maximum inner diameter DO of the second part and an inner diameter D2 of the conversion interface satisfying the following inequality: D3> D2> DO; and the sealing ring or the conversion interface rests on the annular flange. The following advantages are associated with the installation of the exhibition scroll. The volute assembly comprises a volute and a cover plate. The volute includes a cavity. The cover plate is disposed within the volute and covers the cavity. The cover plate includes an air inlet; the volute includes an exhaust duct; the exhaust duct includes an air outlet; the exhaust duct comprises a first part, a second part, and a third part connected sequentially in that order; the first part connects directly to the volute; the air outlet is disposed in the third part; and the inside diameter (ID) of the second part increases in the direction from the first part to the third part. The inner piping of a conventional exhaust duct is eliminated, reducing the injection difficulty and cost of the volute and extending the mold life of the volute. The size of the air outlet remains unchanged, and the volute assembly can be used in conjunction with an existing adapter.According to Bernoulli's principle, the gradual increase in the inner diameter Di of the second part from the first part to the third part can cause the wind speed in the exhaust duct to gradually decrease and the. -5pressure increases gradually, which can reduce the loss of airflow due to the sudden increase in the air outlet area, and also reduce the noise produced in the process of sudden pressure expansion. Other advantages of the exhibition are described in detail in the modality. ZL LCLn / LZnZ / E / YILI Brief Description of the Figures of the Invention Figure 1 is a stereogram of a scroll installation according to an exhibition modality; Figure 2 is another stereogram of a scroll installation according to one exhibition modality; Figure 3 is an enlarged view of part E of Figure 2; Figure 4 is a front view of a scroll installation according to one exhibition modality; Figure 5 is a left view of a scroll installation according to one exhibition modality; Figure 6 is a cross-sectional view taken from line AA in Figure 5; Figure 7 is an enlarged view of part B of Figure 6; Figure 8 is a cross-sectional view of a scroll installation according to one exhibition modality; Figure 9 is an enlarged view of part C of Figure 8; Figure 10 is a stereogram of a suction fan according to one exposure mode; Figure 11 is a cross-sectional view of a suction fan according to one exposure mode; and -6 Figure 12 is an enlarged view of part D of Figure 11. Detailed Description of the Invention To illustrate further, the following modalities describe a volute installation and a fan comprising it. It should be noted that the following modalities are intended to describe, not to limit, the scope of the display. ZL LCLn / LZnZ / E / YILI Example 1 As shown in Figures 1-7, a volute installation comprises a volute 10 and a cover plate 11. The volute comprises a cavity 12; the cover plate 11 is disposed in the volute 10 and covers the cavity 12. The cover plate 11 comprises an air inlet 111; the volute 10 comprises an exhaust duct 13; the exhaust duct 13 comprises an air outlet 130; the exhaust duct 13 comprises a first part 131, a second part 132, and a third part 133 connected sequentially in that order; the first part 131 is directly connected to the volute 10; the air outlet 130 is disposed in the third part 133; and the second part 132 is tapered, and an inside diameter Di of the second part 132 increases in a direction from the first part 131 to the third part 133. The volute's exhaust duct is not divided into an inner and outer pipe. This reduces the difficulty and cost of injection molding and extends the volute mold's lifespan. The dimensions of the 130 air outlet remain unchanged, as does the volute installation. - 7 may be compatible with conventional conversion interfaces. According to Bernoulli's principle, the gradual increase in the inner diameter DI of the second part 132 from the first part 131 to the third part 133 can cause the wind speed in the exhaust duct 13 to gradually decrease and the pressure to gradually increase, which can reduce the loss of airflow due to the sudden increase in the air outlet area, and also reduce the noise produced in the process of sudden pressure expansion. Part 133 comprises an inner wall provided with an annular flange 136; and the inner diameter D3 of the annular flange 136 is greater than the maximum inner diameter of Part 132. The annular flange 136 is configured to limit the mounting position of a conversion interface. Part 133 comprises an outer wall provided with a first flange 1331, a second flange 1332, and a locating groove 1333 disposed between the first flange 1331 and the second flange 1332; the first flange 1331 is disposed at one end of Part 133 and surrounds the air outlet 130; Part 133 further comprises a slit 1334 extending from the first flange 1331 and the second flange 1332. At least one drain hole 134 is provided at a joint of the second part 132 and the third part 133. When condensate is generated, the condensate can be discharged from the volute installation through the drain hole 134. The interior wall of the second part 132 is located -8 sunk towards at least one drainage hole 134 to form a guide channel 135. Condensed water can flow to the drainage hole along the guide channel 135, producing a good drainage effect. Example 2 As shown in Figures 8-9, the volute installation is basically the same as in Example 1 except that: one side of the guide channel 135 that faces the air outlet 130 is provided with a third flange 1351 having a V-shaped or U-shaped section, which is configured to prevent condensate water from entering the first part 131. Example 3 As shown in Figures 10-12, a suction fan comprises a volute installation in Example 1 or 2, a motor 4 comprising a rotating shaft and a wind blade 8; the front end of the rotating shaft of the motor 4 extends into the cavity 12 of the volute installation 1 and is directly connected to the wind blade 8. Part 133 is provided with a conversion interface 5, and a sealing ring 6 is disposed between the conversion interface 5 and part 133; a hose clamp 7 is disposed in the locating groove of part 133; and part 133, the sealing ring 6, and the conversion interface 5 are interlocked by the hose clamp 7. Part 133 comprises an inner wall provided with an annular flange 136; an inner diameter -9D3 of the annular flange 136, a maximum inside diameter DO of the second part 132 and an inside diameter D2 of the conversion interface 5 satisfy the following inequality: D3> D2> DO; and the sealing ring 6 or the conversion interface 5 rests on the annular flange 136. It will be obvious to those skilled in the art that changes and modifications may be made, and therefore the objective of the appended claims is to cover all such changes and modifications.
Claims
1. A volute installation, comprising: 1) a volute, the volute comprising a cavity; and 2) a cover plate disposed on the volute and covering the cavity; wherein: the cover plate comprises an air inlet; the volute comprises an exhaust duct; the exhaust duct comprising an air outlet; the exhaust duct comprises a first part, a second part, and a third part connected sequentially in that order; the first part is directly connected to the volute; the air outlet is disposed in the third part; and the inside diameter DI of the second part increases in the direction from the first part to the third part.
2. The volute assembly of claim 1, wherein the third part comprises an inner wall provided with an annular flange; and the inside diameter D3 of the annular flange is greater than the maximum inside diameter of the second part. 3.The volute assembly of claim 2, wherein the third part comprises an outer wall provided with a first flange, a second flange, and a locating groove disposed between the first flange and the second flange; the first flange is disposed at one end of the third part and surrounds the air outlet; the third part further comprises a slit extending from the first flange and the second flange.
4. The volute assembly of claim 1, 2, or 3, wherein at least one drain hole is disposed in the joint of the second part and the third part.
5. The volute assembly of claim 4, wherein the inner wall of the second part is recessed toward the at least one drain hole to form a guide channel. 6.The volute installation of claim 5, wherein one side of the guide channel facing the air outlet is provided with a third flange to prevent water from entering the first part.
7. A suction fan, comprising a volute installation of any of claims 1-6, a motor comprising a rotating shaft and a wind blade; wherein the front end of the rotating shaft of the motor extends within the cavity of the volute installation and is directly connected to the wind blade.
8. The fan of claim 7, wherein the third part is provided with a conversion interface, and a sealing ring is disposed between the conversion interface and the third part; a hose clamp is disposed in the locating groove of the third part; and the third part, the sealing ring, and the conversion interface are interlocked by the hose clamp. 7L LCLn / L7n7 / E / YIAI 9.The fan of claim 8, wherein the third part comprises an inner wall provided with an annular flange; an inner diameter D3 of the annular flange, a maximum inner diameter DO of the second part, and an inner diameter D2 of the conversion interface satisfy the following inequality: D3 > D2 > DO; and the sealing ring or the conversion interface rests on the annular flange.