Spiral filter, installation structure thereof, and range hood

Abstract

The present invention provides a spiral filter, its mounting structure, and a range hood. The spiral filter is arranged in a spiral shape and comprises: multiple interconnected spiral layers, each of which is provided with a plurality of oil holes, an air inlet being provided between the topmost spiral layer and the adjacent spiral layer; and a mounting shaft hole provided in the center of the spiral filter. In the present invention, when the spiral filter rotates, some oil smoke particles directly collide with the surface of the spiral filter and condense, while other oil smoke particles enter between two adjacent spiral layers of the filter through the oil holes and air inlet on the spiral filter, and condense onto the surface of the spiral filter by colliding with the inner wall of the spiral layer. When the spiral filter rotates, a stable vortex airflow is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a spiral filter screen and a mounting structure thereof, and a range hood. Background Art

[0002] The core component of existing range hoods is the ventilation system, which mainly consists of a smoke hood, a centrifugal fan, and an exhaust pipe. To improve the oil-blocking effect of the range hood, a rotating filter is usually installed at the air inlet of the centrifugal fan.

[0003] Existing rotary filters are typically circular parts with through-holes. Before oil smoke enters the centrifugal fan, it hits the mesh of the rotary filter, condensing and separating it into oil droplets. The oil droplets then slide down the rotary filter and are discharged into the oil cup along the oil path. Rotary filters are generally divided into static and dynamic types. Existing dynamic rotary filters are mostly flat structures, which have a higher oil retention rate than static rotary filters. Three-dimensional dynamic rotary filters have a certain depth and a higher oil retention rate than dynamic flat rotary filters. However, ordinary three-dimensional rotary filters are noisy when in operation and also affect air volume. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the range hood in the prior art, such as high noise and low air intake efficiency.

[0005] To this end, the present invention provides a spiral filter, which is itself arranged in a spiral shape. The spiral filter includes: one or more spiral layers, each spiral layer is provided with a plurality of oil holes, and an air inlet is provided between the spiral layer located on the top layer and the adjacent spiral layer; and an installation shaft hole is provided in the center of the spiral filter.

[0006] In the spiral filter screen of the present invention, the middle portion of each spiral layer is arranged in a convex shape.

[0007] In the spiral filter screen of the present invention, the oil hole itself is pointed and arranged toward the rotation direction of the spiral filter screen, and the apex of the oil hole is arranged in the middle part of the spiral layer.

[0008] The present invention also provides a spiral filter installation structure, comprising: the spiral filter provided by the present invention; and a motor, which is connected to the installation shaft hole of the spiral filter through a filter connecting shaft to drive the spiral filter to rotate.

[0009] The spiral filter installation structure provided by the present invention has a step extending radially at the motor output end, the filter connecting shaft is connected to the step, and a connecting shaft nut is provided between the filter connecting shaft and the step.

[0010] The spiral filter installation structure provided by the present invention further includes: a wind wheel, which is coaxially arranged with the spiral filter and rotates synchronously with the spiral filter, and the spiral filter is arranged at the air inlet position of the wind wheel.

[0011] The spiral filter installation structure provided by the present invention further includes: an oil ring, which is sandwiched between the spiral filter and the wind wheel, and the oil ring is provided with an oil leakage hole.

[0012] The present invention also provides a range hood, comprising: a base body, on which a accommodating cavity is provided; the spiral filter installation structure provided by the present invention is arranged inside the accommodating cavity, and the spiral filter is arranged toward the inlet of the accommodating cavity.

[0013] The range hood provided by the present invention further comprises an oil net, and a cover is buckled at the entrance position of the accommodating cavity.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. The present invention provides a spiral filter, which is itself arranged in a spiral shape. The spiral filter comprises: at least one spiral layer, each spiral layer is provided with a plurality of oil holes, an air inlet is provided between the uppermost spiral layer and the adjacent spiral layer; and a mounting shaft hole is provided in the center of the spiral filter.

[0016] In the present invention, when the spiral filter rotates, a part of the oil smoke particles directly collides with the surface of the spiral filter and condenses, and another part of the oil smoke particles enters between two adjacent spiral layers of the filter through the oil holes and the air inlet on the spiral filter, and condenses to the surface of the spiral filter by colliding with the inner wall of the spiral layer. When the spiral filter rotates, a stable vortex airflow can be formed.

[0017] In the prior art, the airflow of the three-dimensional rotary filter all enters from the oil holes. In the present application, part of the airflow carrying the oil fume particles flows in from the oil holes located on the spiral layer, and the other part flows in from the air inlet. The combination of the oil holes and the air inlet can play a diversion role. At the same time, the airflow entering the oil holes is less, and the airflow entering the air inlet is more. Since the more airflow flows between the layers of the spiral layer, it encounters less obstruction, so the noise is less. At the same time, due to the small obstruction between the layers, the weakening effect on the air volume will be relatively reduced, thereby increasing the air intake efficiency. At the same time, since the rotary filter itself has a multi-layer design, it can increase the oil interception area, thereby increasing the cleaning ability of the oil fume particles.

[0018] 2. The present invention provides a spiral filter screen with a raised center portion on each spiral layer. Compared to a traditional horizontal structure, the raised spiral layers can cut more oil fume particle airflow during the filter screen's rotation, allowing more oil fume particles to be adsorbed on the spiral layers, thereby improving the efficiency of oil fume particle removal.

[0019] 3. In the spiral filter provided by the present invention, the oil hole itself is pointed and arranged toward the rotation direction of the spiral filter, and the apex of the oil hole is arranged in the middle part of the spiral layer.

[0020] The oil holes are symmetrically arranged at both sides of the middle part in a pointed shape, so that the oil holes can absorb oil smoke particles to the maximum extent during the rotation process, thereby improving the purification capacity of the range hood.

[0021] 4. The present invention provides a spiral filter installation structure, wherein a step extending radially is provided at the motor output end, the filter connecting shaft is connected to the step, and a connecting shaft nut is provided between the filter connecting shaft and the step.

[0022] The connection stability between the filter screen and the connecting shaft in the axial and radial directions can be improved by the cooperation between the step, the connecting shaft nut and the filter screen connecting shaft.

[0023] 5. The present invention provides a spiral filter installation structure in which an oil ring is sandwiched between the spiral filter and the impeller, and the oil ring is provided with an oil leakage hole. The oil ring collects waste oil separated by centrifugal force from the spiral filter and allows for timely discharge of the waste oil through the oil leakage hole, preventing waste oil accumulation from affecting purification.

[0024] 6. The present invention provides a range hood, comprising: a base, on which a receiving cavity is provided; the spiral filter installation structure provided by the present invention is arranged inside the receiving cavity, and the spiral filter is arranged toward the inlet of the receiving cavity.

[0025] When the range hood is operating, the impeller rotates, generating negative pressure. Oil smoke particles enter the air inlet of the spiral filter. Some of these oil smoke particles directly collide with the surface of the rotating filter and condense. Other oil smoke particles enter the filter's interlayer through the oil holes or air inlet on the rotating filter. They collide with the inner edge of the interlayer and condense on the filter surface. Finally, the centrifugal effect of the filter's rotation ejects the condensed oil smoke droplets into the annular area formed by the oil screen and the oil ring. They then flow into the oil cup through the oil leakage hole at the bottom of the oil ring. At the same time, the rotation of the spiral filter creates a stable vortex airflow, which reduces the escape rate of oil smoke and makes it easier for oil smoke to be drawn into the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of the spiral filter provided by the present invention;

[0028] Figure 2 A schematic diagram of the second structure of the spiral filter provided by the present invention;

[0029] Figure 3 The spiral filter installation structure provided by the present invention;

[0030] Figure 4 A schematic diagram of the connection between the filter connecting shaft and the motor output shaft provided by the present invention;

[0031] Figure 5 This is a structural schematic diagram of the range hood provided by the present invention.

[0032] Description of reference numerals:

[0033] 1-Spiral filter; 11-Spiral layer; 12-Oil hole; 13-Air inlet; 14-Mounting shaft hole; 2-Motor; 21-Motor output shaft; 211-Step; 3-Connecting shaft nut; 4-Wind wheel; 41-Air inlet; 5-Oil ring; 6-Base; 61-Accommodating chamber; 7-Filter connecting shaft; 8-Filter knob; 9-Oil screen; 10-Crossbeam. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1

[0039] This embodiment provides a spiral filter, such as Figure 1 and Figure 2 As shown, it is arranged in a spiral shape. The spiral filter 1 includes: multiple spiral layers 11 connected to each other, each spiral layer 11 is provided with a plurality of oil holes 12, an air inlet 13 is provided between the uppermost spiral layer 11 and the adjacent spiral layer 11, and an installation shaft hole 14 is provided in the center of the spiral filter.

[0040] In this embodiment, as the spiral filter rotates, some oil fume particles directly collide with the surface of the spiral filter and condense. Other oil fume particles enter between two adjacent spiral layers 11 of the filter through the oil holes 12 and air inlet 13. These particles collide with the inner walls of the spiral layers 11 and condense on the surface of the spiral filter. As the spiral filter rotates, a stable vortex airflow is formed. Part of the airflow carrying oil fume particles flows through the oil holes 12 in the spiral layer 11, while the other part flows through the air inlet 13. The combination of the oil holes 12 and air inlet 13 acts as a flow divider. Simultaneously, less airflow enters the oil holes 12, while more airflow enters the air inlet 13. This greater amount of airflow, flowing between the layers of the spiral layers 11, encounters less obstruction, resulting in less noise. Furthermore, due to the reduced interlayer obstruction, the airflow reduction effect is relatively minimized, thereby increasing air intake efficiency. Furthermore, the multi-layer design of the rotating filter increases the oil interception area, thereby enhancing its ability to remove oil fume particles.

[0041] In this embodiment, the helical layer 11 is a single layer, and the entire pitch has a complete helix. As a variation, the helical layer can be multiple layers, each having a complete helix, and the multiple layers can be parallel to each other or have a certain angle in space.

[0042] In this embodiment, Figure 1As shown, a crossbeam 10 is provided below the air inlet 13 , and the crossbeam 10 can improve the stability and strength of the air inlet 13 itself.

[0043] In the spiral filter provided in this embodiment, the central portion of each spiral layer 11 is convex. Compared to a conventional horizontal structure, the convex spiral layer 11 can cut more oil fume particle airflow during the filter rotation, thereby allowing more oil fume particles to be adsorbed on the spiral layer 11, thereby improving the efficiency of oil fume particle removal.

[0044] Specifically, if Figure 1 As shown, the oil hole 12 itself is pointed and arranged toward the rotation direction of the spiral filter, and the apex of the oil hole 12 is arranged in the middle of the spiral layer 11.

[0045] In this embodiment, Figure 1 As shown, along the radial direction, each spiral layer 11 includes multiple annular structures, and the cross section of the annular structure along the radial direction is wavy. The wavy shape can improve the adsorption capacity of the spiral layer 11 on the oil smoke particles. At the same time, Figure 1 As shown, the ring structure itself is low in the middle and high on the periphery, which can better adsorb oil smoke particles.

[0046] Example 2

[0047] This embodiment provides a spiral filter installation structure, such as Figure 3 and Figure 5 As shown, it includes: the spiral filter provided in Example 1; and a motor 2, which is connected to the mounting shaft hole 14 of the spiral filter through the filter connecting shaft 7 to drive the spiral filter to rotate.

[0048] Specifically, in order to achieve a stable connection between the spiral filter and the mounting shaft hole 14 , a thread is provided at the end of the filter connecting shaft 7 , and the rotating filter is tightened by tightening the filter knob 8 .

[0049] At the same time, if Figure 4 As shown, the output end of the motor 2 is provided with a radially extending step 211, the filter connecting shaft 7 is connected to the step 211, and a connecting shaft nut 3 is provided between the filter connecting shaft 7 and the step 211. At the same time, a thread is provided above the connection, and the connecting shaft nut 3 is connected to the motor output shaft 21 through the thread.

[0050] In this embodiment, Figure 3 and Figure 5As shown, the spiral filter installation structure also includes a wind wheel 4, which is arranged in a three-dimensional shape, is coaxially arranged with the spiral filter and rotates synchronously. The spiral filter is arranged at the air inlet 41 of the wind wheel 4.

[0051] As a variation, the rotary filter can be directly arranged inside the wind wheel 4, and the specific position can be adjusted according to actual working conditions.

[0052] In this embodiment, a support plate is mounted on the motor output shaft 21 and connected to the impeller 4 to drive the impeller 4 in rotation. In this embodiment, the impeller 4 rotates synchronously with the spiral filter. Alternatively, two drive mechanisms can be provided to generate different rotational speeds for the impeller 4 and the spiral filter. This differential rotational speed enhances the purification capability of oil fume particles.

[0053] like Figure 5 As shown, the spiral filter installation structure provided in this embodiment also includes an oil ring 5, which is sandwiched between the spiral filter and the impeller 4. The oil ring 5 is provided with an oil leakage hole 12. Specifically, the oil ring 5 is provided with a groove along the outer circumference. The waste oil thrown from the outer circumference of the spiral filter hits the groove and is stored in the groove. At the same time, the waste oil can be discharged in a timely manner through the oil leakage hole 12, preventing the accumulation of waste oil from affecting purification. Specifically, the oil leakage hole 12 can be connected to the oil cup of the range hood, which will not be described in detail here.

[0054] Example 3

[0055] This embodiment provides a range hood, such as Figure 5 As shown, it includes: a base 6, on which a accommodating cavity 61 is provided; the spiral filter installation structure provided in Example 2 is arranged inside the accommodating cavity 61, and the spiral filter is arranged toward the inlet direction of the accommodating cavity 61. Specifically, from the outside to the inside are: a rotating filter, an oil ring 5, a wind wheel 4 and a motor 2, and the rotating filter is arranged on the outermost side.

[0056] At the same time, the range hood further comprises an oil net 9, which is buckled at the entrance of the accommodating chamber 61. By providing the oil net 9, the spiral filter can be isolated from the outside world to prevent the spiral filter from accidentally hitting the user and causing damage to the user.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A range hood, characterized in that: include: A base (6) having a receiving cavity (61) provided thereon; A spiral filter screen installation structure is arranged inside the accommodating cavity (61), and the spiral filter screen installation structure comprises: A spiral filter screen is provided toward the inlet of the accommodating chamber (61), the spiral filter screen itself being provided in a spiral shape, and the spiral filter screen comprises: Multiple spiral layers (11) are connected to each other, each spiral layer (11) is provided with a plurality of oil holes (12), an air inlet (13) is provided between the uppermost spiral layer (11) and the adjacent spiral layer (11); and a mounting shaft hole (14) is provided at the center of the spiral filter; the radial middle portion of each spiral layer (11) is provided in a convex shape, the oil hole (12) itself is in a pointed shape and is provided in the direction of rotation of the spiral filter, and the apex of the oil hole (12) is provided at the middle portion of the spiral layer (11); along the radial direction, each spiral layer (11) includes a plurality of annular structures, the cross section of the annular structure along the radial direction is wavy, the annular structure itself is low in the middle and high at the periphery, and a crossbeam (10) is provided below the air inlet (13); A motor (2), wherein the motor output shaft (21) of the motor is connected to the mounting shaft hole (14) of the spiral filter through a filter connection shaft (7) to drive the spiral filter to rotate; A wind wheel (4) is coaxially arranged with the spiral filter and rotates synchronously, and the spiral filter is arranged at the air inlet (41) of the wind wheel (4) or inside the wind wheel (4); It also includes an oil net (9) which is buckled at the entrance of the accommodating cavity (61).

2. The range hood according to claim 1, characterized in that: The output end of the motor (2) is provided with a step (211) extending in a radial direction, the filter connecting shaft (7) is connected to the step (211), and a connecting shaft nut (3) is provided between the filter connecting shaft (7) and the step (211).

3. The range hood according to claim 2, characterized in that: Also includes: An oil ring (5) is sandwiched between the spiral filter and the wind wheel (4), and an oil leakage hole is provided on the oil ring (5).

Images