Impeller assembly and range hood with same

Abstract

The utility model discloses an impeller assembly and a range hood with the same, belongs to the technical field of kitchen appliances, and aims to solve the problems that an air guide ring of an existing impeller assembly is low in structural strength and the like. The impeller assembly comprises a first impeller, a second impeller and a middle disc, the first impeller and the second impeller are located at the two ends of the middle disc respectively, each of the first impeller and the second impeller comprises an injection molding filling tail end blade, and a flow intercepting groove is formed in the connecting position of each injection molding filling tail end blade and the middle disc. The flow stopping grooves can slow down the flowing speed of plastic passing through the blades, and the flowing speed of the plastic passing through the air guide ring is not changed, so that the position of the welding line is adjusted, the position of the welding line is adjusted from the air guide ring to the position of the tail end blade filled through injection molding, the strength of the air guide ring is improved, and the air guide ring is prevented from cracking.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to an impeller assembly and a range hood having the same. Background Art

[0002] The impeller of a traditional range hood is generally made by metal casting, stamping, riveting, pressing and other processes. Since the blades of this type of impeller are sheet metal stamping parts, they can only be made into blades with equal cross-section and thickness, which will have an adverse effect on the performance of the fan; the main structure of the impeller is assembled by sheet metal parts, and the structural dimensional accuracy is difficult to ensure, resulting in poor impeller rotation stability.

[0003] The new range hood uses the injection molding process to optimize the design of the fan impeller and sleeve. Through blade injection molding, a more reasonable streamlined cross-section blade is designed to improve the fan's maximum air volume and wind pressure and other performance. The injection molding process will produce weld lines on the product. Weld lines are also called weld marks or water marks. They are fine lines caused by the front part of the molten resin from different directions being cooled and not being completely fused at the joint. When the existing blades are injected, it is easy to produce weld lines at the position of the impeller air guide ring. The weld lines will affect the structural strength of the air guide ring, causing the air guide ring to crack at the weld line during the operation of the impeller.

[0004] Therefore, there is an urgent need for an impeller assembly and a range hood having the same to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0005] One purpose of the utility model is to provide an impeller assembly, which increases the structural strength of the air guide ring.

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

[0007] An impeller assembly includes a first impeller, a second impeller and a middle disk, wherein the first impeller and the second impeller are respectively located at two ends of the middle disk, and the first impeller and the second impeller both include injection-molded filling end blades. A cutoff groove is provided at the connection between the injection-molded filling end blades and the middle disk, and the cutoff groove can make a weld line appear on the injection-molded filling end blades.

[0008] As a preferred technical solution of the above impeller assembly, the intercepting groove is arranged on the center disk around the root of the injection-molded filling terminal blade.

[0009] As a preferred technical solution of the impeller assembly, the intercepting groove is shaped like the root shape of the injection-molded filling terminal blade.

[0010] As a preferred technical solution of the above-mentioned impeller assembly, the intercepting groove includes a first groove and a second groove, the first groove and the second groove are respectively located on both sides of the injection-molded filling terminal blade, and the first groove and the second groove are connected by an arc groove.

[0011] As a preferred technical solution of the above-mentioned impeller assembly, the thickness of the middle disc ranges from 2 mm to 5 mm.

[0012] As a preferred technical solution of the impeller assembly, the depth of the intercepting groove ranges from 0.8 mm to 1.5 mm.

[0013] As a preferred technical solution of the impeller assembly, the width of the intercepting groove ranges from 2 mm to 5 mm.

[0014] As a preferred technical solution of the impeller assembly, the intercepting groove is provided with reinforcing ribs, and the reinforcing ribs separate the intercepting groove.

[0015] As a preferred technical solution of the above-mentioned impeller assembly, the width of the reinforcing ribs ranges from 0.8 mm to 2 mm.

[0016] Another object of the utility model is to provide a range hood having an air guide ring of an impeller assembly having great strength.

[0017] A range hood comprises the above-mentioned impeller assembly.

[0018] Beneficial effects of the utility model:

[0019] The impeller assembly provided by the utility model comprises a first impeller, a second impeller and a middle disk, the first impeller and the second impeller are respectively located at two ends of the middle disk, the first impeller and the second impeller both comprise injection molded filling end blades, a cut-off groove is provided at the connection between the injection molded filling end blades and the middle disk, the cut-off groove can slow down the flow speed of plastic passing through the blades, while the flow speed of plastic passing through the air guide ring remains unchanged, thereby adjusting the position of the weld line, adjusting the weld line position from the air guide ring to the injection molded filling end blades, thereby increasing the strength of the air guide ring and avoiding cracking of the air guide ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an impeller assembly provided in a specific embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the end face of the impeller assembly provided in a specific embodiment of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of an impeller assembly provided in a specific embodiment of the utility model;

[0023] Figure 4 yes Figure 2 A partial enlarged view of the middle A;

[0024] Figure 5 yes Figure 4 Cross-sectional view along the BB axis.

[0025] In the figure:

[0026] 100, first impeller; 101, injection-molded filling terminal blade; 102, intercepting groove; 1021, first groove; 1022, second groove; 103, reinforcing rib;

[0027] 200, second impeller;

[0028] 300, middle plate; 301, glue inlet;

[0029] 400, first air guide ring;

[0030] 500. Second air guide ring. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In the description of the embodiments, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of 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.

[0035] like Figures 1 to 3 As shown, the present embodiment provides an impeller assembly, which includes a first impeller 100, a second impeller 200, a middle disk 300, a first air guide ring 400 and a second air guide ring 500. The first impeller 100 and the second impeller 200 are respectively located at two ends of the middle disk 300, the first air guide ring 400 is arranged at an end of the first impeller 100 away from the middle disk 300, and the second air guide ring 500 is arranged at an end of the second impeller 200 away from the middle disk 300. The first impeller 100 and the second impeller 200 both include an injection molded filling end blade 101, and a cut-off groove 102 is provided at the connection between the injection molded filling end blade 101 and the middle disk 300. The cut-off groove 102 can make a weld line appear on the injection molded filling end blade 101.

[0036] The intercepting groove 102 refers to a groove designed to reduce the flow speed of plastic in a specified area of ​​the product during the product injection molding process. The intercepting groove 102 is set at the connection between the blade 101 at the end of the injection molding filling and the middle disk 300 to slow down the flow speed of plastic through the blade, while the flow speed of plastic through the air guide ring remains unchanged, thereby adjusting the position of the weld line, and adjusting the weld line at the end of the injection molding filling from the air guide ring to the blade 101 at the end of the injection molding filling, thereby increasing the strength of the air guide ring and preventing the air guide ring from cracking; and the strength of the blade is strong enough, and the weld line on the blade will not affect the strength of the impeller.

[0037] It should be noted that the "injection filling end" mentioned here refers to the end of the molten plastic flow path during the injection molding process. The "injection filling end blade 101" refers to the blade formed last at the end of the molten plastic flow path.

[0038] like Figure 3 As shown, the intercepting groove 102 is arranged on the middle plate 300 around the root of the injection filling end blade 101. The intercepting groove 102 around the root of the injection filling end blade 101 can ensure that the intercepting groove 102 effectively decelerates the molten plastic flowing to the injection filling end blade 101, ensuring that the weld line appears on the injection filling end blade 101.

[0039] To improve the deceleration effect of the intercepting groove 102, the intercepting groove 102 is injection molded to fill the root shape of the terminal blade 101. In this way, the intercepting groove 102 is injection molded to fill the root of the terminal blade 101, which is not only compact in structure, but also has the best deceleration effect on the molten plastic.

[0040] Specifically, if Figure 4 As shown, the intercepting groove 102 includes a first groove 1021 and a second groove 1022, which are respectively located on both sides of the injection filling terminal blade 101, and are connected by an arc groove. The first groove 1021 and the second groove 1022 are arranged along the direction of the injection filling terminal blade 101, and are connected by a smooth arc groove, which can buffer the impact force of the molten plastic at this point and gently and steadily reduce the flow rate of the plastic.

[0041] Continue to refer Figure 2 As shown, the middle plate 300 is provided with a glue inlet 301, and the number of the intercepting grooves 102 and the glue inlet 301 is the same and is arranged one by one. The glue inlet 301 refers to the position where the molten plastic enters the mold cavity during the injection process. When there are multiple glue inlets 301 and multiple intercepting grooves 102, the multiple glue inlets 301 are evenly arranged along the circumferential direction. Similarly, the multiple intercepting grooves 102 are also evenly arranged along the circumferential direction. In this embodiment, there are four glue inlets 301 and four intercepting grooves 102. The specific number is not limited to this and can be designed according to actual needs.

[0042] In this embodiment, if Figure 5 As shown, the thickness a of the middle plate 300 ranges from 2 mm to 5 mm, for example, it can be 2 mm, 3 mm, 4 mm or 5 mm, and the specific value can be selected according to actual conditions.

[0043] The depth b of the intercepting groove 102 ranges from 0.8 mm to 1.5 mm, for example, it can be 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm. The specific value can be selected according to actual conditions, such as the thickness of the middle plate 300, the size of the injection-molded filling end blade 101 and other factors.

[0044] The width c of the intercepting groove 102 ranges from 2 mm to 5 mm, for example, 2 mm, 3 mm, 4 mm or 5 mm. The specific value can be selected according to actual conditions, such as the thickness of the middle plate 300, the size of the injection-molded filling end blade 101 and other factors.

[0045] In order to improve the structural strength of the intercepting trough 102, Figure 3 and Figure 4As shown, the intercepting groove 102 is provided with a reinforcing rib 103, and the reinforcing rib 103 separates the intercepting groove 102. The extending direction of the reinforcing rib 103 is substantially along the circumferential direction of the middle plate 300. Since the intercepting groove 102 includes a first groove 1021 and a second groove 1022 respectively located on both sides of the injection-molded filling end blade 101, one reinforcing rib 103 is cut into two parts by the injection-molded filling end blade 101. The number of reinforcing ribs 103 can be one or more. When the number of reinforcing ribs 103 is multiple, the multiple reinforcing ribs 103 are arranged at equal intervals along the radial direction of the middle plate 300 to achieve a uniform slow flow effect.

[0046] The width of the reinforcing rib 103 ranges from 0.8 mm to 2 mm, for example, it can be 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2 mm. The specific value can be selected according to factors such as the thickness of the middle plate 300 and the size of the injection-molded filling end blade 101.

[0047] It should be noted that the size of the intercepting groove 102 and the size of the reinforcing rib 103 are not limited to the above design. In the actual processing process, the design can be carried out according to different impeller sizes, application scenario requirements and other factors.

[0048] It should also be noted that the method of increasing the structural strength of the air guide ring is not limited to the structure in the present embodiment. The purpose of increasing the structural strength of the air guide ring can also be achieved by increasing the size of the air guide ring, adding overflow wells at the weld line at the filling end, etc., which are not listed one by one here.

[0049] This embodiment also provides a range hood, which includes the above-mentioned impeller assembly, and the air guide ring of the impeller assembly has high strength and long service life.

[0050] 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. An impeller assembly, characterized in that: The invention comprises a first impeller (100), a second impeller (200) and a middle disk (300), wherein the first impeller (100) and the second impeller (200) are respectively located at two ends of the middle disk (300), and the first impeller (100) and the second impeller (200) both comprise injection-molded filling end blades (101), and a cut-off groove (102) is provided at the connection between the injection-molded filling end blades (101) and the middle disk (300), and the cut-off groove (102) can make a weld line appear on the injection-molded filling end blades (101).

2. The impeller assembly according to claim 1, characterized in that: The intercepting groove (102) is arranged on the middle plate (300) around the root of the injection-molded filling terminal blade (101).

3. The impeller assembly according to claim 2, characterized in that: The intercepting groove (102) is shaped like the root shape of the injection-molded filling terminal blade (101).

4. The impeller assembly according to claim 2, characterized in that: The intercepting groove (102) comprises a first groove (1021) and a second groove (1022), wherein the first groove (1021) and the second groove (1022) are respectively located on two sides of the injection-molded filling terminal blade (101), and the first groove (1021) and the second groove (1022) are connected via an arc groove.

5. The impeller assembly according to claim 1, characterized in that: The thickness of the middle plate (300) ranges from 2 mm to 5 mm.

6. The impeller assembly according to claim 1, characterized in that: The depth of the intercepting groove (102) ranges from 0.8 mm to 1.5 mm.

7. The impeller assembly according to claim 1, characterized in that: The width of the intercepting groove (102) is in the range of 2 mm to 5 mm.

8. The impeller assembly according to any one of claims 1 to 7, characterized in that: The intercepting groove (102) is provided with a reinforcing rib (103), and the reinforcing rib (103) separates the intercepting groove (102).

9. The impeller assembly according to claim 8, characterized in that: The width of the reinforcing rib (103) ranges from 0.8 mm to 2 mm.

10. A range hood, characterized in that: The invention comprises an impeller assembly as claimed in any one of claims 1 to 9.

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