Impeller middle disc and range hood

Abstract

The utility model provides an impeller middle disc and a range hood, and relates to the technical field of kitchen appliances, the reverse side of the impeller middle disc faces a motor, an air inlet structure is arranged on the impeller middle disc, and the air inlet structure comprises a guide plate and an air inlet hole which are sequentially arranged in the rotating direction of the impeller middle disc; the air inlet penetrates through the front and back side surfaces of the impeller middle disc; the guide plate is arranged on the front face of the impeller middle disc and used for guiding airflow on the front face of the impeller middle disc to enter the air inlet.

Description

Technical Field

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

[0002] At present, the range hood has become one of the essential kitchen appliances in ordinary families. When the range hood works, the suction and exhaust of oil fume are carried out through the operation of the fan.

[0003] In the existing single-inlet fan, the impeller middle plate is in a closed state. A plurality of through holes are formed in the impeller middle plate, and the through holes are communicated with the air flow channel. The projections of some impeller blades on the axial direction of the impeller middle plate are in contact with or coincide with the through holes. Since no air enters from the motor side of the impeller middle plate, when the motor operates for a long time, the temperature generated by the motor cannot be quickly dissipated. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an impeller middle plate and a range hood to alleviate the technical problem that the temperature generated by the motor cannot be quickly dissipated when the motor operates for a long time.

[0005] An impeller middle plate provided by the utility model, the reverse side of the impeller middle plate faces the motor, and an air inlet structure is arranged on the impeller middle plate. The air inlet structure includes a guide plate and an air inlet hole which are arranged in sequence along the rotation direction of the impeller middle plate. The air inlet hole penetrates through the front and back sides of the impeller middle plate; the guide plate is arranged on the front surface of the impeller middle plate and is used for guiding the air flow on the front surface of the impeller middle plate into the air inlet hole.

[0006] Furthermore, the number of the air inlet structures is multiple.

[0007] Furthermore, a plurality of the air inlet structures are arranged at intervals in the circumferential direction to form an annular air inlet group.

[0008] Furthermore, along the radial direction of the impeller middle plate, the number of the annular air inlet groups is at least two.

[0009] Furthermore, the air inlet structures in two adjacent annular air inlet groups are arranged in a staggered manner;

[0010] and / or, the annular air inlet group is arranged on the boss of the impeller middle plate, and the value range of the distance L between two adjacent annular air inlet groups is L=(0.1-0.15)B, where B is the height of the boss;

[0011] and / or, one end of the guide plate is connected to the impeller middle plate. Let the distance between the other end of the guide plate and the impeller middle plate be the length of the guide plate. In two adjacent annular air inlet groups, the length of the guide plate in the annular air inlet group close to the center of the impeller middle plate is greater than the length of the guide plate in the annular air inlet group far from the center of the impeller middle plate.

[0012] Further, an air outlet structure is provided on the middle disc of the impeller. Compared with the air inlet structure, the air outlet structure is farther from the center of the middle disc of the impeller.

[0013] The air outlet structure includes air outlet holes, and the air outlet holes penetrate through the front and back sides of the middle disc of the impeller.

[0014] Further, the diameter of the air outlet holes is less than or equal to half of the diameter of the air inlet holes.

[0015] Further, the number of the air outlet holes is multiple. Along the radial direction of the middle disc of the impeller, there are at least two circumferentially arranged circles of air outlet holes.

[0016] Further, the air outlet holes are arranged on the convex platform of the middle disc of the impeller. The distance d between the topmost circle of air outlet holes and the top of the convex platform ranges from d=(0.7 - 0.8)B, where B is the height of the convex platform.

[0017] In a second aspect, an oil fume extractor provided by the present utility model includes the above-mentioned middle disc of the impeller.

[0018] The present utility model at least has the following advantages or beneficial effects:

[0019] The reverse side of the middle disc of the impeller provided by the present utility model faces the motor. An air inlet structure is provided on the middle disc of the impeller. The air inlet structure includes a guide plate and air inlet holes arranged in sequence along the rotation direction of the middle disc of the impeller. The air inlet holes penetrate through the front and back sides of the middle disc of the impeller; the guide plate is arranged on the front of the middle disc of the impeller and is used to guide the air flow on the front of the middle disc of the impeller into the air inlet holes.

[0020] After the middle disc of the impeller rotates, the guide plate can guide the gas entering the fan into the air inlet holes. When the air flow passes through the middle disc of the impeller, it can make the air flow form a spiral state in the inner cavity on the reverse side of the middle disc of the impeller, so that the air flow can rotate around the surface of the motor in a spiral descending manner on the reverse side of the middle disc of the impeller, taking away the heat of the motor.

[0021] The oil fume extractor provided by the present utility model includes the above-mentioned middle disc of the impeller. Since the oil fume extractor provided by the present utility model incorporates the above-mentioned middle disc of the impeller, the oil fume extractor provided by the present utility model also has the advantages of the middle disc of the impeller. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1Schematic diagram of the impeller middle plate provided by the embodiment of the present utility model;

[0024] Figure 2 Schematic diagram of the front side of the impeller middle plate provided by the embodiment of the present utility model;

[0025] Figure 3 Side view of the impeller middle plate provided by the embodiment of the present utility model;

[0026] Figure 4 Schematic diagram of the front side of the impeller with the impeller middle plate provided by the embodiment of the present utility model;

[0027] Figure 5 Schematic diagram of the reverse side of the impeller with the impeller middle plate provided by the embodiment of the present utility model;

[0028] Figure 6 Schematic diagram of the fan with the impeller middle plate provided by the embodiment of the present utility model.

[0029] Icon: 100 - impeller middle plate; 110 - boss; 120 - guide plate; 130 - air inlet hole; 140 - air outlet hole;

[0030] 200 - impeller front plate;

[0031] 300 - blade;

[0032] 400 - impeller rear plate. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0035] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0037] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] As Figure 4 - Figure 6 As shown, in the impeller provided by the present utility model, the impeller middle plate 100 is respectively combined with structures such as the impeller front plate 200, the blades 300, and the impeller rear plate 400 to form an impeller.

[0040] As Figure 1 and Figure 2 As shown, among them, the reverse side of the impeller middle plate 100 faces the motor. A convex platform 110 protruding towards the front is provided on the impeller middle plate 100. A concave cavity is formed on the reverse side of the convex platform 110 for accommodating the motor.

[0041] As Figure 1 and Figure 4As shown in the figure, an air intake structure is provided on the impeller middle plate 100. The air intake structure is provided on the boss 110 and is close to the top end of the boss 110. The air intake structure includes a guide plate 120 and an air intake hole 130 arranged in sequence along the rotation direction of the impeller middle plate 100. The bending radian of the guide plate 120 can be consistent with the bending radian of the blade 300. The air intake hole 130 penetrates through the front and back sides of the impeller middle plate 100; the guide plate 120 is arranged on the front of the impeller middle plate 100. After the impeller middle plate 100 rotates, the guide plate 120 is used to push the air flow into the air intake hole 130.

[0042] The specific principle is as follows: After the impeller middle plate 100 rotates, the guide plate 120 can guide the gas entering the fan into the air intake hole 130. When the air flow passes through the impeller middle plate 100, it can make the air flow form a spiral state in the inner cavity on the back side of the impeller middle plate 100, so that the air flow can rotate around the surface of the motor in a spiral descending manner on the back side of the impeller middle plate 100, taking away the heat of the motor.

[0043] In order to increase the air flow rate entering the back side of the impeller middle plate 100, the number of air intake structures is set to be multiple. The multiple air intake structures can be arranged at intervals in the circumferential direction to form an annular air intake group. Of course, multiple air intake structures arranged in other arrangements can still achieve the purpose of increasing the air intake volume.

[0044] As Figure 2 shown, in this embodiment, the number of air intake structures in the annular air intake group is four, and the included angle formed by two adjacent air intake structures is 90°. In other feasible solutions, the number of air intake structures in the annular air intake group can also be three, five or more. Each air intake structure is evenly distributed or unevenly distributed in the circumferential direction.

[0045] Along the radial direction of the impeller middle plate 100, the number of annular air intake groups is at least two. In this embodiment, the number of annular air intake groups is two. The air intake structures in two adjacent annular air intake groups are arranged in a staggered manner, so that the air intake structures are dispersedly arranged, which is beneficial to the entry of air flow. In this embodiment, the included angle between the air intake holes 130 of the upper group and the lower group is 45°.

[0046] As Figure 3 shown, the annular air intake group is arranged on the boss 110 of the impeller middle plate 100. The value range of the distance L between two adjacent annular air intake groups is L=(0.1 - 0.15)B, where B is the height of the boss 110. The distance between two adjacent annular air intake groups is restricted to prevent the two from being too close, resulting in interference between the two spiral air flows entering the back side of the impeller middle plate 100.

[0047] One end of the guide plate 120 is connected to the impeller middle plate 100. Let the distance between the other end of the guide plate 120 and the impeller middle plate 100 be the length of the guide plate 120. Among two adjacent annular air inlet groups, the length of the guide plate 120 in the annular air inlet group closer to the center of the impeller middle plate 100 is greater than the length of the guide plate 120 in the annular air inlet group farther from the center of the impeller middle plate 100.

[0048] Because there is a boss 110 in the middle of the impeller middle plate 100 and the guide plate 120 is arranged on the inclined surface of the boss 110. Therefore, in order to prevent the guide plate 120 close to the center from affecting the air guiding of the guide plate 120 far from the center, the guide plate 120 close to the center is set shorter, while the guide plate 120 far from the center is set longer.

[0049] In other implementable solutions, the air flow entering the reverse side of the impeller middle plate 100 can leave from other positions after heat exchange with the motor.

[0050] As Figure 1 shown, in this embodiment, an air outlet structure is provided on the impeller middle plate 100. Compared with the air inlet structure, the air outlet structure is farther from the center of the impeller middle plate 100; the air outlet structure includes air outlet holes 140, and the air outlet holes 140 penetrate through the front and back sides of the impeller middle plate 100.

[0051] As the impeller middle plate 100 rotates, the guide plate 120 can drive the air flow into the reverse side of the impeller middle plate 100, so that a spiral air flow is generated on the reverse side of the impeller middle plate 100. After the spiral air flow contacts the motor, it then flows out through the air outlet holes 140 at the lower part of the impeller middle plate 100, taking away the heat generated by the motor, improving the performance of the motor, and making the fan operate more stably.

[0052] The diameter of the air outlet holes 140 is less than or equal to half of the diameter of the air inlet holes 130. That is to say, a stream of air flowing in from the air inlet holes 130 will be divided into at least two streams and flow out from the air outlet holes 140, slowing down the residence time of the air flow on the reverse side of the impeller middle plate 100 and improving the heat exchange efficiency between the air flow and the motor.

[0053] The number of the air outlet holes 140 is multiple. Along the radial direction of the impeller middle plate 100, there are at least two circumferentially arranged circles of air outlet holes 140 to increase the air output.

[0054] As Figure 3 shown, the air outlet holes 140 are arranged on the boss 110 of the impeller middle plate 100. The distance d between the top of the outermost circle of air outlet holes 140 and the top of the boss 110 ranges from d=(0.7 - 0.8)B, where B is the height of the boss 110, which limits the position of the air outlet structure and prevents the air outlet structure from being too close to the air inlet structure, resulting in the incoming air flow flowing out from the air outlet holes 140 before acting on the motor.

[0055] The range hood provided by the present utility model includes the impeller middle disc 100 described above. Since the range hood provided by the present utility model incorporates the impeller middle disc 100 described above, the range hood provided by the present utility model also has the advantages of the impeller middle disc 100.

[0056] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An impeller middle disc, the reverse side of the impeller middle disc faces the motor, and is characterized in that, An air inlet structure is provided on the impeller middle plate. The air inlet structure includes a guide plate (120) and an air inlet hole (130) arranged in sequence along the rotation direction of the impeller middle plate. The air inlet hole (130) penetrates through the front and back sides of the impeller middle plate; the guide plate (120) is arranged on the front side of the impeller middle plate and is used to guide the air flow on the front side of the impeller middle plate into the air inlet hole (130).

2. The impeller middle disc according to claim 1, wherein The number of the air inlet structures is multiple.

3. The impeller middle plate according to claim 2, wherein, The multiple air inlet structures are arranged at intervals in the circumferential direction to form an annular air inlet group.

4. The impeller middle plate according to claim 3, wherein, In the radial direction of the impeller middle plate, the number of the annular air inlet groups is at least two.

5. The impeller middle disc according to claim 4, characterized in that, The air inlet structures in two adjacent annular air inlet groups are arranged in a staggered manner; and / or, the annular air inlet group is arranged on the boss (110) of the impeller middle plate, and the value range of the distance L between two adjacent annular air inlet groups is L=(0.1 - 0.15)B, where B is the height of the boss (110); and / or, one end of the guide plate (120) is connected to the impeller middle plate. Let the distance between the other end of the guide plate (120) opposite to the impeller middle plate be the length of the guide plate (120). Among two adjacent annular air inlet groups, the length of the guide plate (120) in the annular air inlet group closer to the center of the impeller middle plate is greater than the length of the guide plate (120) in the annular air inlet group farther from the center of the impeller middle plate.

6. The impeller middle disc according to any one of claims 1-5, characterized in that, An air outlet structure is provided on the impeller middle plate. Compared with the air inlet structure, the air outlet structure is farther from the center of the impeller middle plate; The air outlet structure includes an air outlet hole (140), and the air outlet hole (140) penetrates through the front and back sides of the impeller middle plate.

7. The impeller middle plate according to claim 6, wherein The diameter of the air outlet hole (140) is less than or equal to half of the diameter of the air inlet hole (130).

8. The impeller middle disc according to claim 6, wherein The number of the air outlet holes (140) is multiple. In the radial direction of the impeller middle plate, there are at least two circles of air outlet holes (140) arranged in a circumferential arrangement.

9. The impeller middle disc according to claim 7, characterized in that, The air outlet hole (140) is arranged on the boss (110) of the impeller middle plate, and the value range of the distance d between the outermost circle of air outlet holes (140) closest to the top of the boss (110) and the top of the boss (110) is d=(0.7 - 0.8)B, where B is the height of the boss (110).

10. An oil fume purifier, characterized in that, Including the impeller middle plate according to any one of claims 1 - 9.

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