A curved blade fan structure with dual airflow channels

Abstract

This utility model discloses an arc-blade fan structure with dual airflow channels, belonging to the field of kitchen appliances. It includes a housing, an internal exhaust assembly disposed within the housing, an external exhaust assembly disposed outside the housing, and a motor disposed on the top of the housing. The motor output shaft is fixedly connected to both the internal and external exhaust assemblies, driving them to operate synchronously to simultaneously exhaust oil fumes from the bottom of the housing and high-temperature gas from the top. This utility model uses the motor output shaft to drive the internal and external exhaust assemblies to operate synchronously, and the dual-channel exhaust allows for the simultaneous exhaust of oil fumes from the bottom of the housing and high-temperature gas from the top.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, specifically to an arc-shaped blade fan structure with dual airflow channels. Background Technology

[0002] Traditional electric ovens and other kitchen appliances mostly use a single exhaust system.

[0003] Direct exhaust structure: The fan directly exhausts the internal fumes, but the fumes tend to accumulate at the bottom of the casing, making cleaning difficult and causing uneven heat dissipation;

[0004] Top exhaust structure: Although it can extract high-temperature gas from the top, it cannot solve the problem of oil mist condensation at the bottom, which will corrode equipment components with long-term use.

[0005] Furthermore, a single exhaust mode cannot simultaneously handle the high-temperature gas at the top and the oil fumes at the bottom. Utility Model Content

[0006] This invention provides a curved blade fan structure with dual airflow channels, which can solve one of the following problems existing in the single exhaust mode of the prior art:

[0007] 1. Single airflow mode cannot simultaneously treat high-temperature gas at the top and oil fumes at the bottom; 2. Traditional blade structure has high airflow resistance and low compression efficiency; 3. Oil fume accumulation at the bottom leads to a shortened equipment lifespan.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A curved blade fan structure with dual airflow channels includes a housing, an internal exhaust assembly disposed inside the housing, an external exhaust assembly disposed outside the housing, and a motor disposed on the top of the housing. The output shaft of the motor is fixedly connected to the internal exhaust assembly and the external exhaust assembly respectively, for driving the internal exhaust assembly and the external exhaust assembly to operate synchronously, so as to simultaneously discharge oil fumes at the bottom of the housing and high-temperature gas at the top of the housing.

[0010] As a further embodiment of this utility model: the external exhaust assembly includes:

[0011] A fixed cover is fixedly installed on the top of the housing, and the motor is fixed on the fixed cover;

[0012] An exhaust impeller, the center of which is fixedly connected to the motor output shaft extending into the fixed cover;

[0013] An external exhaust channel is provided on the fixed cover and communicates with the interior of the fixed cover.

[0014] As a further embodiment of this utility model: the exhaust impeller edge has several vertical blades evenly distributed along the circumference.

[0015] As a further embodiment of this utility model: the external exhaust channel is a gradually expanding exhaust channel, and the inlet diameter of the external exhaust channel is smaller than the outlet diameter.

[0016] As a further embodiment of this utility model: the internal exhaust assembly includes:

[0017] A circular base plate, the center of which is fixedly connected to the motor output shaft extending into the housing;

[0018] An annular windbreak, the annular windbreak being located directly below the circular base plate;

[0019] Arc-shaped blades, a plurality of such arc-shaped blades being evenly distributed between the annular windbreak plate and the circular base plate;

[0020] An internal exhaust channel is provided on the surface of the housing.

[0021] As a further embodiment of this utility model: the annular windbreak is composed of three arc-shaped plates spliced ​​together, and the diameter of the annular windbreak is the same as that of the circular base plate.

[0022] As a further embodiment of this utility model: both the upper and lower ends of the arc-shaped blade are provided with buckles, and the arc-shaped blade is fixedly installed between the annular windbreak plate and the circular base plate by means of the buckles.

[0023] As a further embodiment of this utility model: the number of arc-shaped blades is 8 to 12, which are evenly distributed along the circumference between the annular windbreak plate and the circular base plate, and the radius of curvature R of each arc-shaped blade satisfies: 40mm≤R≤60mm.

[0024] As a further embodiment of this utility model: the surface of the circular base plate is provided with radial ribs, which extend from the center of the circular base plate to the root of the arc-shaped blade.

[0025] As a further embodiment of this utility model, the number of the pressure ribs is the same as the number of the arc-shaped blades.

[0026] The beneficial effects of this utility model are:

[0027] This utility model provides an external exhaust component outside the housing and an internal exhaust component inside the housing. The output shaft of the motor is fixedly connected to the internal exhaust component and the external exhaust component respectively. The output shaft of the motor drives the internal exhaust component and the external exhaust component to run synchronously. The dual-channel exhaust allows the internal exhaust component and the external exhaust component to simultaneously discharge the oil fumes at the bottom of the housing and the high-temperature gas at the top of the housing.

[0028] The internal exhaust assembly of this utility model includes a circular base plate, an annular baffle plate, arc-shaped blades, and an internal exhaust channel. The arc-shaped blades are evenly distributed around the circumference between the annular baffle plate and the circular base plate. The arc-shaped blades have low airflow resistance and high compression efficiency, which can form a strong suction force to draw the oil fumes from the bottom of the housing upwards, preventing the accumulation of oil fumes at the bottom of the housing from corroding the equipment and extending the service life of the equipment. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of an arc-shaped blade fan structure with dual airflow channels according to the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the casing of this utility model;

[0032] Figure 3 This is a schematic diagram of the combined structure of the internal exhaust assembly and the external exhaust assembly of this utility model;

[0033] Figure 4 yes Figure 3 A schematic diagram of the structure excluding the fixed cover.

[0034] In the diagram: 1. Shell; 2. Internal exhaust assembly; 21. Circular base plate; 22. Annular wind baffle; 23. Arc-shaped blade; 231. Buckle; 24. Internal exhaust channel; 25. Rib; 3. External exhaust assembly; 31. Fixing cover; 32. Exhaust impeller; 321. Blade; 33. External exhaust channel; 4. Motor. Detailed Implementation

[0035] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Please see Figure 1-4 As shown, this utility model embodiment provides an arc-shaped blade fan structure with dual airflow channels, including a housing 1, an internal exhaust assembly 2, an external exhaust assembly 3, and a motor 4.

[0039] Please see Figure 1 As shown, motor 4 is a DC brushless motor with a speed of ≥2000r / min. Motor 4 is located at the top of housing 1. Internal exhaust assembly 2 is located inside housing 1, and external exhaust assembly 3 is located outside housing 1. The output shaft of motor 4 is fixedly connected to internal exhaust assembly 2 and external exhaust assembly 3 respectively. Motor 4 is used to drive internal exhaust assembly 2 and external exhaust assembly 3 to operate synchronously, so that internal exhaust assembly 2 and external exhaust assembly 3 can synchronously discharge oil fumes at the bottom of housing 1 and high-temperature gas at the top of housing 1.

[0040] Please see Figure 1 and Figure 3 As shown, the external exhaust assembly 3 includes a fixed cover 31, an exhaust impeller 32, and an external exhaust channel 33. The fixed cover 31 is fixedly mounted to the top of the housing 1 with screws, and the motor 4 is fixed to the fixed cover 31 by a bracket. The output shaft of the motor 4 extends through the fixed cover 31 and the housing 1 into the housing 1, and the center of the exhaust impeller 32 is fixedly connected to the output shaft of the motor 4 extending into the fixed cover 31; the external exhaust channel 33 is disposed on the fixed cover 31 and communicates with the interior of the fixed cover 31. Please refer to [link to relevant documentation]. Figure 4 As shown, the exhaust impeller 32 has several vertical blades 321 evenly distributed along its circumference. The external exhaust channel 33 is a gradually expanding exhaust channel, and the inlet diameter of the external exhaust channel 33 is smaller than the outlet diameter.

[0041] In operation, the rotation of motor 4 drives the exhaust impeller 32 to rotate along with the output shaft of motor 4. The rotation of exhaust impeller 32 creates a vortex inside the fixed cover 31, drawing the high-temperature gas from the top of housing 1 into the fixed cover 31 and discharging it from the external exhaust channel 33. The external exhaust channel 33 adopts a small inlet and large outlet design, which allows for smoother air discharge. When air is compressed in the small inlet, its pressure decreases and its flow rate slows down as it flows from a small area to a large area, making it easier to integrate with the outside air.

[0042] Please see Figure 3 and Figure 4As shown, the internal exhaust assembly 2 includes a circular base plate 21, an annular baffle plate 22, arc-shaped blades 23, and an internal exhaust channel 24. The center of the circular base plate 21 is fixedly connected to the output shaft of the motor 4 extending into the housing 1. The annular baffle plate 22 is located directly below the circular base plate 21. Preferably, the annular baffle plate 22 is composed of three arc-shaped plates spliced ​​together, and the diameter of the annular baffle plate 22 is the same as that of the circular base plate 21. The arc-shaped blades 23 are evenly distributed between the annular baffle plate 22 and the circular base plate 21. Specifically, both the upper and lower ends of the arc-shaped blades 23 are provided with buckles 231. The arc-shaped blades 23 are riveted and fixedly installed between the annular baffle plate 22 and the circular base plate 21 by the buckles 231. The number of arc-shaped blades 23 is 8 to 12, and they are evenly distributed along the circumference between the annular baffle plate 22 and the circular base plate 21. The radius of curvature R of each arc-shaped blade 23 satisfies: 40mm≤R≤60mm. The circular base plate 21 has radial ribs 25 on its surface, extending from the center of the circular base plate 21 towards the root of the arc-shaped blades 23. The number of ribs 25 is the same as the number of arc-shaped blades 23. An internal exhaust channel 24 is formed on the surface of the housing 1. The arc-shaped blades 23 have low airflow resistance and high compression efficiency, generating strong suction to draw oil fumes from the bottom of the housing 1 upwards, preventing oil fumes from accumulating at the bottom of the housing 1 and corroding the equipment, thus extending the service life of the equipment.

[0043] In actual operation, the rotation of motor 4 drives the circular base plate 21 to rotate with the output shaft of motor 4. The circular base plate 21 drives the arc blades 23 to rotate synchronously. The rotation of the arc blades 23 forms a vortex in the housing 1, which draws the oil fumes from the bottom of the housing 1 upward and discharges them from the internal exhaust channel 24.

[0044] The working principle of this utility model:

[0045] When the motor 4 rotates, the output shaft of the motor 4 drives the exhaust impeller 32 and the circular base plate 21 to rotate synchronously. During this process, the exhaust impeller 32 rotates and forms a vortex in the fixed cover 31, which draws the high-temperature gas at the top of the housing 1 into the fixed cover 31 and discharges it from the external exhaust channel 33. The circular base plate 21 drives the arc blades 23 to rotate synchronously. The arc blades 23 rotate and form a vortex in the housing 1, which draws the oil fumes at the bottom of the housing 1 upward and discharges them from the internal exhaust channel 24, thereby synchronously discharging the oil fumes at the bottom of the housing 1 and the high-temperature gas at the top of the housing 1.

[0046] The preferred embodiments of this utility model have been described in detail above and should not be considered as limiting the scope of this utility model. All equivalent changes and improvements made within the scope of the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A fan structure with arc-shaped blades and dual airflow channels, comprising a housing (1), characterized in that: It also includes an internal exhaust assembly (2) disposed inside the housing (1), an external exhaust assembly (3) disposed outside the housing (1), and a motor (4) disposed on the top of the housing (1). The output shaft of the motor (4) is fixedly connected to the internal exhaust assembly (2) and the external exhaust assembly (3) respectively, and is used to drive the internal exhaust assembly (2) and the external exhaust assembly (3) to operate synchronously, so as to synchronously discharge the oil fumes at the bottom of the housing (1) and the high-temperature gas at the top of the housing (1).

2. The arc-shaped blade fan structure with dual airflow channels according to claim 1, characterized in that, The external exhaust assembly (3) includes: A fixed cover (31) is fixedly installed on the top of the housing (1), and the motor (4) is fixed on the fixed cover (31); An exhaust impeller (32) is fixedly connected at its center to the output shaft of a motor (4) extending into the fixed cover (31); An external exhaust channel (33) is provided on the fixed cover (31) and communicates with the interior of the fixed cover (31).

3. The arc-shaped blade fan structure with dual airflow channels according to claim 2, characterized in that: The exhaust impeller (32) has several vertical blades (321) evenly distributed along the circumference at its edge.

4. The arc-shaped blade fan structure with dual airflow channels according to claim 2, characterized in that: The external exhaust channel (33) is a gradually expanding exhaust channel, and the inlet diameter of the external exhaust channel (33) is smaller than the outlet diameter.

5. The arc-shaped blade fan structure with dual airflow channels according to claim 1, characterized in that, The internal exhaust assembly (2) includes: A circular base plate (21) is fixedly connected at its center to the output shaft of a motor (4) extending into the housing (1); An annular windbreak (22) is located directly below the circular base plate (21); Arc-shaped blades (23), a plurality of such arc-shaped blades (23) are evenly distributed between the annular windbreak plate (22) and the circular base plate (21); An internal exhaust channel (24) is provided on the surface of the housing (1).

6. The arc-shaped blade fan structure with dual airflow channels according to claim 5, characterized in that: The annular windbreak (22) is composed of three arc-shaped plates spliced ​​together, and the annular windbreak (22) has the same diameter as the circular base plate (21).

7. The arc-shaped blade fan structure with dual airflow channels according to claim 6, characterized in that: Both ends of the arc-shaped blade (23) are provided with buckles (231), and the arc-shaped blade (23) is fixedly installed between the annular windbreak plate (22) and the circular base plate (21) by the buckles (231).

8. The arc-shaped blade fan structure with dual airflow channels according to claim 7, characterized in that: The number of the arc-shaped blades (23) is 8 to 12, and they are evenly distributed around the circumference between the annular windbreak plate (22) and the circular base plate (21). The radius of curvature R of each arc-shaped blade (23) satisfies: 40mm≤R≤60mm.

9. The arc-shaped blade fan structure with dual airflow channels according to claim 8, characterized in that: The circular base plate (21) has radial ribs (25) on its surface, and the ribs (25) extend from the center of the circular base plate (21) to the root of the arc-shaped blade (23).

10. The arc-shaped blade fan structure with dual airflow channels according to claim 9, characterized in that, The number of the pressure ribs (25) is the same as the number of the arc-shaped blades (23).

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