Fan system, disassembly and assembly method of fan system, and range hood

Abstract

The present invention relates to a fan system, a method for disassembling and assembling a fan system, and a range hood. The fan system includes a volute, an impeller, a motor, and a motor bracket. The impeller is rotatably arranged in the volute. The motor is mounted on the volute through the motor bracket, and the power output end is connected to the impeller. The volute has a front plate and a rear plate arranged at intervals in front and back. The front plate is provided with an air inlet, and the rear plate is provided with a first mounting port through which the impeller can pass. The motor bracket is formed into a disc shape and is detachably arranged at the first mounting port, and the motor is detachably arranged on the motor bracket. When the fan system of the present invention is disassembled, the motor bracket is first removed from the rear plate of the volute, and then the installation unit composed of the impeller, the motor, and the motor bracket is removed from the volute, and then the impeller is removed from the output end of the motor, and the motor is removed from the motor bracket. When the fan system of the present invention is arranged with the air inlet facing backward, it is convenient to disassemble and assemble the fan and the impeller.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a fan system, a method for disassembling and assembling the fan system, and a range hood using the fan system. Background Art

[0002] Range hoods are an indispensable appliance in the kitchen today. The more common and widely used ones are the upper exhaust fume purification systems.

[0003] At present, the upper exhaust fume purification system is mainly divided into two categories: top suction range hood and close suction range hood. Top suction range hood is more beautiful, but its smoke inlet is higher and the smoke extraction effect is limited; compared with top suction range hood, close suction range hood has a lower smoke inlet, but due to the influence of the appearance structure and internal air duct structure of close suction range hood, the current close suction range hood cannot get closer to the smoke, which greatly limits its smoke extraction effect.

[0004] The fan system structure in the existing range hood is generally as shown in the invention patent application with publication number CN108087336A, "A centrifugal fan and a range hood using the centrifugal fan" (application number: CN201710629367.3), in which the fan system includes a volute, an impeller, a motor bracket and a motor, wherein the impeller is rotatably arranged in the volute, the motor bracket is directly welded to the rear plate of the volute, the motor is fixed to the volute through the motor bracket and the output end is connected to the impeller. When repairing the fan system, the main repair parts are the motor and the impeller, that is, the motor and the impeller need to be removed when the range hood is installed. Since the air inlet of this type of fan system is arranged forward when it is in use, the impeller and the motor are taken out from the air inlet of the fan for easy disassembly and assembly, that is, the volute fixed on the range hood is not disassembled, and the impeller and the motor are taken out from the air inlet in sequence. The motor bracket welded on the rear plate of the volute provides convenience for installing the motor from front to back, but at the same time, the motor bracket also blocks the space at the rear side of the volute, and does not allow the impeller and the motor to be removed from the rear side of the volute.

[0005] When the fan system is installed in reverse in the range hood, that is, the air inlet of the fan is arranged backwards, the above-mentioned existing fan system structure cannot realize the removal of the fan and the impeller without disassembling the volute. Instead, the entire fan system including the volute needs to be disassembled before the impeller and the motor can be further removed, which is extremely inconvenient. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a fan system which is convenient for disassembling and assembling the impeller and the motor from the rear side of the volute in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a method for disassembling and assembling the above-mentioned fan system in response to the current status of the prior art. This method can disassemble and assemble the impeller and the motor from the rear side of the volute when the volute is fixed, thereby providing convenience for the maintenance of the range hood with the fan installed in reverse.

[0008] The third technical problem to be solved by the present invention is to provide a range hood with the above-mentioned fan system in view of the current status of the prior art, which is convenient for disassembly and assembly of the impeller and motor of the fan system, and is convenient for later maintenance and repair.

[0009] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a fan system, including a volute, an impeller, a motor and a motor bracket, the impeller is rotatably arranged in the volute, the motor is installed on the volute through the motor bracket and the power output end is connected to the impeller, the volute has a front plate and a rear plate arranged in a front-to-back interval, the front plate is provided with an air inlet, and is characterized in that: the rear plate is provided with a first installation opening for the impeller to pass through, the motor bracket is formed into a disc shape and is detachably arranged at the first installation opening, and the motor is detachably arranged on the motor bracket.

[0010] Preferably, the rear plate of the volute is provided with a positioning structure arranged near the first mounting opening and capable of pre-positioning the motor bracket when it is installed. Since the motor bracket of the present invention is formed into a disc shape, it is difficult to quickly position the motor bracket with the motor and impeller installed to the volute, but the positioning structure can quickly realize the positioning of the motor bracket, saving time and effort.

[0011] As a preferred solution, the positioning structure is a slot arranged near the lower edge of the first mounting opening and capable of inserting the lower edge of the motor bracket therein.

[0012] As a preferred solution, a positioning opening extending from front to back is provided on the rear plate of the volute, and correspondingly, an elastic claw which can be inserted into the positioning opening is provided on the rear side wall of the motor bracket, and the elastic claw and the positioning opening together constitute the positioning structure.

[0013] As a preferred solution, the rear plate of the volute is provided with a socket arranged near the side edge of the first installation port, and correspondingly, the rear wall of the motor bracket is provided with an insert that can be inserted downward into the socket, and the insert and the socket together constitute the positioning structure. Preferably, the width of the socket gradually increases from bottom to top, and the insert is formed by folding back the part of the motor bracket near the edge.

[0014] In the above solutions, the outer diameter of the motor bracket is larger than the diameter of the first mounting opening, and the edge of the motor bracket is connected to the rear plate of the volute by bolts. After adopting the above positioning structure, the number of bolts used can be reduced when the motor bracket is screwed to the volute, saving installation time.

[0015] In the above solutions, a second mounting opening is opened in the middle of the motor bracket, and the motor is arranged through the second mounting opening and connected to the motor bracket.

[0016] Preferably, a radially extending assembly ring is provided on the outer peripheral wall of the motor, the outer diameter of the assembly ring is larger than the diameter of the second mounting opening, and the assembly ring is connected to the motor bracket at the outer edge of the second mounting opening by bolts. The fan system adopting this structure is a fan system with a single air inlet, which is not only easy to assemble, but also the rear wall of the volute is closed by assembling the assembly ring with the edge of the second mounting opening, thereby avoiding air volume loss and improving the fume suction effect.

[0017] Preferably, the outer diameter of the motor is smaller than the diameter of the second mounting opening, a mounting bracket protruding into the volute is provided in the second mounting opening, an air inlet area for air to enter the volute is formed between the mounting bracket and the edge of the second mounting opening, and the motor is arranged on the mounting bracket. This structure is suitable for a fan with double air inlets, and such a structure is adopted in order to enable the motor to drive the two impellers to rotate.

[0018] Specifically, the mounting frame includes a first assembly bar and a second assembly bar which are arranged at intervals and connected to the motor bracket at their ends, the middle parts of the first assembly bar and the second assembly bar protrude into the volute to form protruding parts, and the motor is installed between the protruding parts of the first assembly bar and the protruding parts of the second assembly bar. Alternatively, the mounting frame has an annular body, and the two sides of the annular body respectively have side plates extending forward, the front ends of the side plates are connected to the edges of the second mounting opening, and the motor is arranged on the annular body; the side plates are provided with openings for air to pass through.

[0019] A method for disassembling and assembling the above-mentioned fan system is characterized by comprising the following steps:

[0020] (1) During installation, the motor is installed on the motor bracket, and then the impeller is connected to the output end of the motor, so that the impeller, the motor, and the motor bracket form an installation whole. Finally, the impeller is inserted into the volute from the first installation port on the rear plate of the volute, and the motor bracket is aligned with the first installation port and fixed;

[0021] (2) When disassembling, first remove the motor bracket from the rear plate of the volute, then remove the installation unit consisting of the impeller, motor, and motor bracket from the volute, then remove the impeller from the output end of the motor, and remove the motor from the motor bracket.

[0022] A range hood using the above-mentioned fan system comprises a shell, and is characterized in that: the fan system is arranged in the shell, the lower part of the shell has a vertically arranged smoke inlet chamber, the front side wall of the lower part of the shell is provided with a smoke inlet port connected to the smoke inlet chamber, the upper part of the shell has a smoke collecting chamber connected to the smoke inlet chamber, the smoke collecting chamber extends forward to form an installation chamber for installing the fan system, the air inlet of the fan system is connected to the smoke collecting chamber, and the air outlet of the fan system is arranged upward.

[0023] Preferably, the lower edge of the front plate extends forward to form a first bottom plate connected to the rear plate, and the first bottom plate gradually tilts upward from the rear to the front. This structure facilitates the oil droplets on the fan to be guided along the first bottom plate to the rear edge of the first bottom plate, and the rear edge is arranged corresponding to the outlet of the smoke inlet chamber, so that the oil droplets on the fan are discharged downward.

[0024] Preferably, the lower edge of the rear plate extends backward to form a second bottom plate, the lower edge of the second bottom plate is connected to the outlet of the smoke inlet chamber, and a gap is formed between the second bottom plate and the first bottom plate. Furthermore, the second bottom plate gradually tilts upward from the back to the front to form a guide structure that can guide the oil dripping from the volute to the smoke inlet chamber. This structure is conducive to further discharging the oil droplets on the fan.

[0025] Preferably, the rear edge of the second bottom plate gradually extends backward from top to bottom to form an inclined plate, and a guide air duct located between the smoke inlet chamber and the smoke collecting chamber is formed between the inclined plate and the rear wall of the shell. On the one hand, this structure facilitates the downward discharge of oil droplets on the fan, and on the other hand, the guide air duct, which gradually expands in width from bottom to top in the front-to-back direction, can make the oil smoke entering the smoke collecting chamber flow smoothly, thereby improving the oil smoke absorption effect.

[0026] In the above schemes, the lower part of the shell has a front side plate and a rear side plate arranged at an interval between the front and rear sides, the smoke inlet chamber is located between the front side plate and the rear side plate, the smoke inlet is opened at the lower part of the front side plate, and the lower edge of the front side plate is arranged higher than the lower edge of the rear side plate to form a smoke inlet.

[0027] Compared with the prior art, the advantages of the present invention are as follows: when installing the fan system of the present invention, the motor is installed on the motor bracket, and then the impeller is connected to the output end of the motor, so that the impeller, the motor, and the motor bracket form an installation whole, and finally, the impeller is inserted into the volute from the first installation port on the rear plate of the volute, so that the motor bracket corresponds to the first installation port and is fixed; when disassembling, the motor bracket is first removed from the rear plate of the volute, and then the installation whole composed of the impeller, the motor, and the motor bracket is removed from the volute, and then the impeller is removed from the output end of the motor, and the motor is removed from the motor bracket. When the fan system of the present invention is arranged with the air inlet facing backward, it is convenient to disassemble and assemble the fan and the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a fan system according to Embodiment 1 of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0030] Figure 3 for Figure 1 Partial exploded view of

[0031] Figure 4 for Figure 1 Exploded diagram of

[0032] Figure 5 This is a schematic diagram of the assembly structure of the motor bracket and the rear plate in Example 1 of the present invention;

[0033] Figure 6 for Figure 5 Schematic diagram of the positioning structure;

[0034] Figure 7 This is a schematic diagram of the assembly structure of the motor bracket and the rear plate in Example 2 of the present invention;

[0035] Figure 8 for Figure 7 Schematic diagram of the positioning structure;

[0036] Fig. 9 This is a schematic diagram of the assembly structure of the motor bracket and the rear plate in Example 3 of the present invention;

[0037] Fig.10 for Fig. 9 Schematic diagram of the positioning structure;

[0038] Fig.11 It is a structural schematic diagram of a fan system in Embodiment 4 of the present invention;

[0039] Fig.12 for Fig.11 Schematic diagram of the assembly structure of the motor and the motor bracket;

[0040] Fig.13 This is a schematic diagram of the structure of the fan system in Embodiment 5 of the present invention;

[0041] Fig.14 It is a cross-sectional view of the range hood in Example 1 of the present invention. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings.

[0043] like Figures 1 to 6As shown in Figures 1 and 14, the fan system a of this embodiment includes a volute 1, an impeller 2, a motor 3 and a motor bracket 4. The impeller 2 is rotatably arranged in the volute 1. The motor 3 is mounted on the volute 1 through the motor bracket 4 and the power output end is connected to the impeller 2. The volute 1 has a front plate 11, a rear plate 12 and a volute ring wall 13. The front plate 11 and the rear plate 12 are arranged in a front-to-back interval. The volute ring wall 13 is arranged between the front plate 11 and the rear plate 12 and encloses an inner cavity for installing the impeller 2 together with the front plate 11 and the rear plate 12. An air inlet 111 is opened on the front plate 11, and an air outlet 14 is provided at the top of the volute 1.

[0044] In this embodiment, a first mounting opening 121 is provided on the rear plate 12 for the impeller 2 to pass through, the motor bracket 4 is formed into a disc shape and is detachably arranged at the first mounting opening 121, and the motor 3 is detachably arranged on the motor bracket 4. A positioning structure 15 is provided on the rear plate 12 of the volute 1, which is arranged near the first mounting opening 121 and can pre-position the motor bracket 4 when it is installed. Since the motor bracket 4 of this embodiment is formed into a disc shape, it is difficult to quickly position the motor bracket 4 with the motor 3 and the impeller 2 installed on the volute 1, and the above-mentioned positioning structure 15 can quickly realize the positioning of the motor bracket 4, saving time and effort. The positioning structure 15 of this embodiment is a slot arranged near the lower edge of the first mounting opening 121 and capable of inserting the lower edge of the motor bracket 4 into it.

[0045] The outer diameter of the motor bracket 4 of this embodiment is larger than the diameter of the first mounting opening 121, and the edge of the motor bracket 4 is connected to the rear plate 12 of the volute by bolts 16. Specifically, during installation, the lower edge of the motor bracket 4 is inserted into the slot for pre-positioning, and then the motor bracket 4 and the rear plate 12 are fixed by bolts. The positioning structure 15 can save the use of bolts 16 and save installation time. A second mounting opening 41 is opened in the middle of the motor bracket 4, and the motor 3 is arranged through the second mounting opening 41. A radially extending assembly ring 31 is arranged on the outer peripheral wall of the motor 3. The outer diameter of the assembly ring 31 is larger than the diameter of the second mounting opening 41, and the assembly ring 31 is connected to the motor bracket 4 at the outer edge of the second mounting opening 41 by bolts. The fan system adopting this structure is a fan system with a single air inlet, which is not only easy to assemble, but also the rear wall of the volute 1 is closed by assembling the assembly ring 31 with the edge of the second mounting opening 41, avoiding air volume loss and improving the fume suction effect.

[0046] The disassembly and assembly method of the fan system a in this embodiment is:

[0047] (1) During installation, the motor 3 is installed on the motor bracket 4, and then the impeller 2 is connected to the output end of the motor 3, so that the impeller 2, the motor 3, and the motor bracket 4 form an installed whole. Finally, the impeller 2 is inserted into the volute 1 from the first installation opening 121 on the rear plate 12 of the volute 1, and the motor bracket 4 is aligned with the first installation opening 121 and fixed;

[0048] (2) During disassembly, first remove the motor bracket 4 from the rear plate 12 of the volute 1, then remove the installation unit consisting of the impeller 2, the motor 3, and the motor bracket 4 from the volute 1, then remove the impeller 2 from the output end of the motor 3, and then remove the motor 3 from the motor bracket 4.

[0049] The range hood with the above-mentioned fan system a in this embodiment includes a shell body 5, in which the fan system a is arranged, the lower part of the shell body 5 has a vertically arranged smoke inlet chamber 51, the front side wall of the lower part of the shell body 5 has a smoke inlet port 511 connected to the smoke inlet chamber 51, the upper part of the shell body 5 has a smoke collecting chamber 52 connected to the smoke inlet chamber 51, the smoke collecting chamber 52 extends forward to form an installation chamber 53 for installing the fan system a, the air inlet port 111 of the fan system a is arranged toward the smoke collecting chamber 52, and the air outlet 14 of the fan system a is arranged upward.

[0050] The lower edge of the front plate 11 extends forward to form a first bottom plate 112 connected to the rear plate 12, and the first bottom plate 112 gradually tilts upward from the back to the front. This structure facilitates the oil droplets on the fan to be guided along the first bottom plate 112 to the rear edge of the first bottom plate 112, and the rear edge is arranged corresponding to the outlet of the smoke inlet chamber 51, so as to facilitate the oil droplets on the fan to be discharged downward. The lower edge of the rear plate 12 extends backward to form a second bottom plate 122, and the lower edge of the second bottom plate 122 is connected to the outlet of the smoke inlet chamber 51, and a gap 120 is formed between the second bottom plate 122 and the first bottom plate 112. The second bottom plate 122 gradually tilts upward from the back to the front to form a guide structure that can guide the oil dripping from the volute 1 to the smoke inlet chamber 51, and this structure is conducive to further discharging the oil droplets on the fan. The rear edge of the second bottom plate 122 gradually extends from top to bottom and tilts backward to form an inclined plate 125, and a guide air duct 54 located between the smoke inlet chamber 51 and the smoke collecting chamber 52 is formed between the inclined plate 125 and the rear wall of the shell 5. On the one hand, this structure facilitates the downward discharge of oil droplets on the fan, and on the other hand, the guide air duct 54, which gradually increases in width from bottom to top in the front-to-back direction, can make the oil smoke entering the smoke collecting chamber 52 flow smoothly, thereby improving the oil smoke absorption effect.

[0051] The lower part of the shell 5 has a front side plate 55 and a rear side plate 56 arranged in front and back intervals. The smoke inlet chamber 51 is located between the front side plate 55 and the rear side plate 56. The lower edge of the front side plate 55 is arranged higher than the lower edge of the rear side plate 56 to form a smoke inlet port 511.

[0052] Embodiment 2:

[0053] The difference between this embodiment and embodiment 1 is that the positioning structure in this embodiment is different from that in embodiment 1.

[0054] Specifically, Figure 7 , 8 As shown, a positioning hole 123 that passes through the front and back is opened on the rear plate 12 of the volute 1. Correspondingly, an elastic claw 42 that can be inserted into the positioning hole 123 is provided on the rear side wall of the motor bracket 4. The elastic claw 42 and the positioning hole 123 together constitute the positioning structure of this embodiment.

[0055] Embodiment 3:

[0056] The difference between this embodiment and embodiment 1 is that the positioning structure in this embodiment is different from that in embodiment 1.

[0057] Specifically, Fig. 9 , 10 As shown, the rear plate 12 of the volute 1 is provided with a socket 124 arranged near the side edge of the first mounting opening 121, and correspondingly, the rear wall of the motor bracket 4 is provided with an insert 43 which can be inserted downward into the socket 124, and the insert 43 and the socket 124 together constitute the positioning structure of this embodiment. The width of the socket 124 gradually increases from bottom to top, and the insert 43 is formed by folding back the part of the motor bracket 4 near the edge.

[0058] Embodiment 4:

[0059] The difference between this embodiment and embodiment 1 is that the motor bracket in this embodiment is different from that in embodiment 1.

[0060] In this embodiment, the outer diameter of the motor 3 is smaller than the diameter of the second mounting opening 41', and a mounting bracket 411 protruding into the volute 1 is provided in the second mounting opening 41', and an air inlet area 412 for air to enter the volute 1 is formed between the mounting bracket 411 and the edge of the second mounting opening 41', and the motor 3 is arranged on the mounting bracket 411. This structure is suitable for a fan with double air inlets, and such a structure is adopted in order to enable the motor 3 to drive the two impellers to rotate.

[0061] Specifically, Fig.13 As shown, the mounting frame 411 includes a first assembly bar 4113 and a second assembly bar 4114 which are arranged at intervals and whose ends are respectively connected to the motor bracket 4. The middle parts of the first assembly bar 4113 and the second assembly bar 4114 respectively protrude into the volute 1 to form a protruding portion 4110, and the motor 3 is installed between the protruding portion 4110 of the first assembly bar 4113 and the protruding portion 4110 of the second assembly bar 4114.

[0062] Embodiment 5:

[0063] The difference between this embodiment and embodiment 4 is that the mounting frame in this embodiment is different from that in embodiment 4.

[0064] like Fig.11 , 12 As shown, the mounting frame 411' of this embodiment has an annular body 4111, and the two sides of the annular body 4111 respectively have side plates 4112 extending forward, and the front ends of the side plates 4112 are connected to the edges of the second mounting opening 41'. The motor 3 is arranged on the annular body 4111, and the side plates 4112 are provided with openings 4115 for air to pass through. The annular body 4111 is located at the front side of the motor bracket 4', and an air inlet area 412' is formed between the edge of the annular body 4111 and the edge of the second mounting opening 41'.

Claims

1. A fan system, comprising a volute (1), an impeller (2), a motor (3) and a motor bracket (4), wherein the impeller (2) is rotatably arranged in the volute (1), the motor (3) is mounted on the volute (1) through the motor bracket (4) and a power output end is connected to the impeller (2), the volute (1) has a front plate (11) and a rear plate (12) arranged in a front and rear spaced relationship, the front plate (11) is provided with an air inlet (111), and is characterized in that: The rear plate (12) is provided with a first mounting opening (121) through which the impeller (2) can pass; the motor bracket (4) is formed into a disc shape and is detachably mounted at the first mounting opening (121); and the motor (3) is detachably mounted on the motor bracket (4); The rear plate (12) of the volute (1) is provided with a positioning structure (15) which is arranged near the first mounting opening (121) and can pre-position the motor bracket (4) when it is installed; the positioning structure (15) is a slot which is arranged near the lower edge of the first mounting opening (121) and can insert the lower edge of the motor bracket (4) therein; the rear plate (12) of the volute (1) is provided with a positioning opening (123) which passes through from front to back, and correspondingly, the rear side wall of the motor bracket (4) is provided with an elastic claw (42) which can be inserted into the positioning opening (123), and the elastic claw (42) and the positioning opening (123) together constitute the positioning structure.

2. The fan system according to claim 1, characterized in that: The rear plate (12) of the volute (1) is provided with a socket (124) arranged near the side edge of the first mounting opening (121); correspondingly, the rear wall of the motor bracket (4) is provided with an insert (43) which can be inserted downward into the socket (124); the insert (43) and the socket (124) together constitute the positioning structure.

3. The fan system according to claim 2, characterized in that: The width of the socket (124) increases gradually from bottom to top, and the inserting piece (43) is formed by folding back a portion of the motor bracket (4) close to the edge.

4. The fan system according to any one of claims 1 to 3, characterized in that: The outer diameter of the motor bracket (4) is greater than the diameter of the first mounting opening (121), and the edge of the motor bracket (4) is connected to the rear plate (12) of the volute (1) via bolts (16).

5. The fan system according to any one of claims 1 to 3, characterized in that: A second mounting opening (41) is provided in the middle of the motor support (4), and the motor (3) is arranged through the second mounting opening (41) and connected to the motor support (4).

6. The fan system according to claim 5, characterized in that: A radially extending assembly ring (31) is provided on the outer peripheral wall of the motor (3); the outer diameter of the assembly ring (31) is greater than the diameter of the second mounting opening (41); and the assembly ring (31) is connected to the motor bracket (4) at the outer edge of the second mounting opening (41) by bolts.

7. The fan system according to claim 5, characterized in that: The outer diameter of the motor (3) is smaller than the diameter of the second mounting opening; a mounting frame (411) protruding into the volute (1) is provided in the second mounting opening; an air inlet area (412) for supplying air into the volute (1) is formed between the mounting frame (411) and the edge of the second mounting opening; and the motor (3) is arranged on the mounting frame (411).

8. The fan system according to claim 7, characterized in that: The mounting frame (411) comprises a first assembly bar (4113) and a second assembly bar (4114) which are arranged at intervals and whose ends are respectively connected to the motor bracket (4); the middle parts of the first assembly bar (4113) and the second assembly bar (4114) respectively protrude into the volute (1) to form a protruding portion (4110); and the motor (3) is mounted between the protruding portion (4110) of the first assembly bar (4113) and the protruding portion (4110) of the second assembly bar (4114).

9. The fan system according to claim 7, characterized in that: The mounting frame comprises an annular body (4111), and both sides of the annular body (4111) respectively comprise side plates (4112) extending forward, and the front ends of the side plates (4112) are connected to the edges of the second mounting opening, and the motor (3) is arranged on the annular body (4111).

10. The fan system according to claim 9, characterized in that: The side plate (4112) is provided with an opening (4115) for air to pass through.

11. A method for disassembling and assembling a fan system according to any one of claims 1 to 10, characterized in that The following steps are involved: (1) During installation, the motor (3) is installed on the motor bracket (4), and then the impeller (2) is connected to the output end of the motor (3), so that the impeller (2), the motor (3) and the motor bracket (4) form an installed whole. Finally, the impeller (2) is inserted into the volute (1) from the first installation opening (121) on the rear plate (12) of the volute (1), and the motor bracket (4) is aligned with the first installation opening (121) and fixed. (2) During disassembly, first remove the motor bracket (4) from the rear plate (12) of the volute (1), then remove the installation unit consisting of the impeller (2), the motor (3) and the motor bracket (4) from the volute (1), then remove the impeller (2) from the output end of the motor (3), and then remove the motor (3) from the motor bracket (4).

12. A range hood using the fan system according to any one of claims 1 to 10, comprising a housing (5), characterized in that: The shell (5) is provided with the fan system (a), the lower part of the shell (5) has a vertically arranged smoke inlet chamber (51), the front side wall of the lower part of the shell (5) is provided with a smoke inlet port (511) connected to the smoke inlet chamber (51), the upper part of the shell (5) has a smoke collecting chamber (52) connected to the smoke inlet chamber (51), the smoke collecting chamber (52) extends forward to form an installation chamber (53) for installing the fan system (a), the air inlet port (111) of the fan system (a) is connected to the smoke collecting chamber (52), and the air outlet (14) of the fan system (a) is arranged upward.

13. The range hood according to claim 12, characterized in that: The lower edge of the front plate (11) extends forward to form a first bottom plate (112) connected to the rear plate (12), and the first bottom plate (112) gradually tilts upward from the rear to the front.

14. The range hood according to claim 13, characterized in that: The lower edge of the rear plate (12) extends backward to form a second bottom plate (122), the lower edge of the second bottom plate (122) is connected to the outlet of the smoke inlet chamber (51), and a gap (120) is formed between the second bottom plate (122) and the first bottom plate (112).

15. The range hood according to claim 14, characterized in that: The second bottom plate (122) gradually tilts upward from the back to the front, thereby forming a guide structure capable of guiding the oil dripping from the volute (1) into the smoke chamber (51).

16. The range hood according to claim 14, characterized in that: The rear edge of the second bottom plate (122) gradually extends backward from top to bottom to form an inclined plate (125), and a guide air duct (54) located between the smoke inlet chamber (51) and the smoke collecting chamber (52) is formed between the inclined plate (125) and the rear wall of the shell (5).

17. The range hood according to any one of claims 12 to 16, characterized in that: The lower part of the shell (5) comprises a front side plate (55) and a rear side plate (56) which are arranged in a front-to-back manner, the smoke inlet chamber (51) is located between the front side plate (55) and the rear side plate (56), and the lower edge of the front side plate (55) is arranged higher than the lower edge of the rear side plate (56) to form a smoke inlet port (511).

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