Direct-suction and direct-discharge range hood

Abstract

The utility model discloses a direct-suction and direct-discharge range hood which consists of an upper part and a lower part, the air cabinet with the upper portion provided with the long-neck curved-surface air channel and the sinking volute is installed in the machine shell, a main air inlet of the volute inclines towards the rear lower portion, the outer space of the main air inlet of the volute in the rear lower direction is wide, air inflow of a wind wheel is easy, and the suction performance is strong. Isolation flow guide plates are installed on the left side and the right side in the air inlet box body, airflow is isolated from entering the space on the left side and the right side of the box body, airflow disturbance influence is blocked, the airflow is guided to rapidly reach a volute air suction area, the airflow cross section of the cavity space is large, the flow speed is low, the cavity body surface area is large, and oil smoke separation is easy. The middle is provided with a half-pair transverse baffle net which can further separate oil smoke; the inclined wind wheel is not prone to oil accumulation, and the service life of the wind wheel is effectively prolonged; the air inlet of the range hood can be directly seen from the position of the air outlet of the range hood to the inside of the range hood, airflow passes through an area smoothly without blocking, direct suction and direct discharge are achieved, the smoke suction effect is enhanced, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and more specifically, to a range hood. Background Art

[0002] The most basic function of a range hood is to draw in cooking fumes, separate them, exhaust them, and collect residual oil. Regardless of the type of range hood, its structure is essentially an exhaust fan encased in a shell. An ideal range hood should offer excellent fume extraction, low noise, ease of use, easy cleaning, stable performance, a stylish appearance, and a high cost-effectiveness. Currently, few household range hoods on the market meet all of these requirements. Utility Model Content

[0003] To achieve the above requirements, the present invention provides a direct suction and exhaust range hood with high oil and smoke suction efficiency, low noise, convenient use, easy cleaning, stable performance, stylish appearance, and high cost performance. The technical solution of the present invention is as follows:

[0004] A direct suction and exhaust range hood consists of two parts, the upper and lower parts. Figure 1 The upper part includes the motor, wind wheel, wind cabinet, hood, circuit board, and casing; the circuit board and wind hood are installed on the top of the casing, the wind cabinet with a long-neck curved air duct and a sunken volute is installed inside the casing, the motor and centrifugal wind wheel are installed inside the volute, and air can enter from both sides of the volute. The lower part includes a platform frame, a switch panel, a rear shell, a left side panel, a right side panel, a left isolation guide plate, a right isolation guide plate, a horizontal baffle, a condensation baffle, a cavity rear panel, a bottom panel, an oil cup hook, and a strip oil cup; the platform frame, the rear shell, the left side panel, the right side panel, and the bottom panel form a box body, which is connected under the casing, with oil cup hooks and strip oil cups at the bottom of the box body; there is a cavity rear panel in the box body (in actual applications, the cavity rear panel and the rear shell panel of some products can be the same panel), isolation guide plates are installed on the left and right sides, a horizontal baffle is installed on the top, and a rectangular condensation baffle with a condensation baffle hook is hung in front of the oblique surface, the air inlet of the range hood is located at the bottom of the condensation baffle and at the rear of the lower section of the box body, and the switch panel is bonded with a plum blossom buckle in front of the platform frame, and a switch with a delay function is inside the switch panel. The cavity rear panel 31 can have various shapes, such as Figure 2 He Ru Figure 5 Vertical plane type, such as Figure 3 He Ru Figure 7 Vertical flat top and curved bottom, such as Figure 4 He Ru Figure 8 Vertical flat top and folded bottom type.

[0005] The wind cabinet has a long neck, and the inclined volute outlet duct extends and bends to the outlet located on the horizontal plane, and then connects to the smoke cap. The main air inlet of the volute is tilted downward and rearward, and the bottom of the wind cabinet is sunken to the horizontal range of 5cm above and 10cm below the platform frame. The external space of the main air inlet of the volute facing backward and downward is wide, which facilitates the air intake of the impeller, and has a similar function to that of a submersible pump, with submerged suction and strong suction performance. The angle between the axis of the impeller installation and the horizontal plane of the bottom of the casing is 15°-75°.

[0006] Isolation guide plates are installed on the left and right sides of the range hood housing. The isolation guide plates are tightly fitted with the rear cavity plate, the top plate and the side plates of the platform frame, and are tightly fitted with the condensation hanging plates. The enclosed space formed prevents oil smoke from entering, isolates the airflow from entering the left and right corners of the housing, and prevents the influence of airflow disturbance. Grease will not accumulate in the left and right corners of the housing, thus isolating the oil smoke. The isolation guide plates also guide the airflow to quickly enter the impeller. The airflow passes through the area smoothly and unobstructed, which enhances the smoking effect and reduces noise. The isolation guide plates can play a role in reinforcing the housing. The isolation guide plates can have various shapes, such as: Figure 2 、 Figure 3 、 Figure 4 .

[0007] There is a half-width horizontal cross-block in the box body, which is located at the rear of the box body, below the wind cabinet, and is connected to the upper part of the isolation guide plate on the left and right. The cross-block serves to reinforce the overall structure of the range hood, while also serving to separate some of the oil smoke and prevent large foreign objects from being sucked into the wind wheel due to improper operation.

[0008] The space formed by the rear panel, left and right partitions, wind cabinet, and condenser plate is only half-width, creating a spacious airflow area. Airflow in this space is slow, allowing oil smoke to condense in this area, facilitating further separation. The large air volume around the volute inlet provides sufficient air for instantaneous absorption by the impeller, resulting in naturally strong winds. The large cross-sectional area of ​​the entire intake passage ensures that even if the interior of the range hood is not cleaned and even thick grease accumulation persists over long-term use, it will not clog the passage and affect the extraction of oil smoke.

[0009] The impeller is installed at an angle, and the blades of the impeller are not in a horizontal position at any time. The tilted blades are not easy to accumulate oil, which extends the service life of the impeller. The range hood has a delay function. Using the delay function at the end can also effectively reduce the impact of residual oil droplets on the range hood.

[0010] Observing from the air outlet of the range hood to the inside of the range hood, your eyes can directly pass through the impeller blades, the center of the impeller, the main air inlet of the wind cabinet, the gap in the screen, and see the air inlet of the range hood. The airflow is unobstructed, and the air is directly sucked in and discharged, so the oil fume extraction effect is naturally good.

[0011] When installing the rear-suction range hood, the general installation height is 40-50CM between the oil cup and the stove surface (about 45CM is optimal). The area below the range hood switch panel is a large smoke collection area. The air inlet of the range hood is located at the lower rear part of the box. The fan shape with the air inlet as the center can reach 135 degrees, which can accurately sweep across the pot surface and effectively remove smoke from the oil.

[0012] The range hood has a simple appearance, with most surfaces consisting of a single plane, making it easy to clean. After use, users only need to wipe the smooth surface of the range hood. If the range hood is not under repair, there is no need to disassemble and clean it. If you do need to clean the interior, no tools are required. Simply use your hands to pull out the switch panel, remove the switch panel, and then remove the diagonally hanging condensation baffle. It is easy and convenient.

[0013] The range hood is small in size, simple in structure, and has low material cost. It does not have flashy functions such as opening and closing, lifting, and dazzling colors. It is highly practical and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the appearance of a range hood in an embodiment of the present utility model;

[0015] Figure 2 This is a structural diagram of the lower part of the range hood in an embodiment of the present invention, wherein the isolation guide plate is L-shaped;

[0016] Figure 3 This is a structural diagram of the lower portion of the range hood in an embodiment of the present invention, wherein the isolation guide plate is an arc-shaped surface;

[0017] Figure 4 This is a structural diagram of the lower part of the range hood in the embodiment of the present utility model, in which the isolation guide plate is a straight-faced type;

[0018] Figure 5 It is a right perspective schematic diagram of the range hood in the embodiment of the utility model;

[0019] Figure 6 This is a rear perspective schematic diagram of a long-neck curved air cabinet assembly of a range hood in an embodiment of the present utility model;

[0020] Figure 7 Schematic diagram of the sight line of the range hood through the air outlet and the shape of the rear panel of the range hood from the right side in the embodiment of the utility model;

[0021] Figure 8 It is a right side view schematic diagram of the shape of the rear plate of the cavity of the range hood in the embodiment of the present utility model;

[0022] Reference numerals: 11 - housing; 12 - housing; 21 - switch panel; 22 - switch; 23 - condensation baffle; 24 - lighting; 25 - platform frame; 26 - hole for installing switch panel; 27 - hole for hanging condensation panel; 28 - left side panel; 29 - right side panel; 30 - left isolation guide plate; 31 - cavity rear plate; 32 - horizontal baffle; 33 - right isolation guide plate; 34 - oil cup hook; 35 - oil receiving hole; 36 - strip oil cup; 37 - plum blossom buckle; 38 - condensation baffle hook; 39 - range hood air inlet; 40 - impeller; 41 - motor; 42 - long-neck curved wind cabinet; 43 - range hood air outlet; 44 - wind cabinet oil drip hole; 45 - volute main air inlet; 46 - actual non-existent sight line; 51 - rear housing plate; DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "upright," "upper," "lower," "front," "rear," "left," "right," "oblique," "horizontal," "top," "bottom," "inner," "range," "region," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the embodiments of the present invention and to simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In the field of range hoods, descriptions that are directly understandable to professionals have been omitted.

[0025] The present invention provides a range hood comprising two parts, the upper and lower parts. Figure 1The upper part includes a motor 41, a wind wheel 40, a wind cabinet 42, a hood, a circuit board, and a casing 11; the circuit board and the hood are installed on the top of the casing, and the wind cabinet 42 with a long-necked curved air duct and a sunken volute is installed in the casing 11. The motor 41 and the centrifugal wind wheel 40 are installed inside the volute, and air can enter from both sides of the volute. The lower part includes a platform frame 25, a switch panel 21, a cavity rear plate 31, a rear shell plate 51, a left plate 28, a right plate 29, a rear shell plate 51, a left isolation guide plate 30, a right isolation guide plate 33, a horizontal baffle 32, a condensation baffle 23, and a strip oil cup 36. The box body 12 is composed of a platform plate frame 25, a left side plate 28, a right side plate 29, and a rear shell plate 51. The box body 12 is connected to the bottom of the casing. A strip-shaped oil cup 36 is hung at the bottom of the box body 12. There is a vertically installed cavity rear plate 31 at the rear of the box body 12, on which a left isolation guide plate 30 and a right isolation guide plate 33 are installed. A horizontal baffle 32 is installed on the upper part of the isolation guide plate; there is a condensation plate hook 38 on the rectangular condensation baffle 23, and the condensation plate hook 38 corresponds to the hole 27 for hanging the condensation plate, so that the condensation baffle 23 can be hung obliquely on the box body 12; the strip-shaped range hood air inlet 39 formed by the condensation baffle 23 and the cavity rear plate 31 is located at the bottom of the condensation baffle 23 and at the rear of the lower section of the box body 12. The back of the switch panel 21 is glued with 2-6 plum blossom buckles 37, and the front of the platform frame 25 has a corresponding number of holes 26 for installing the switch panel, so that the switch panel 21 can be buckled on the platform frame 25; the switch 22 with a delay function is glued inside the switch panel 21. The cavity back plate 31 can have various shapes, such as Figure 2 He Ru Figure 5 Vertical plane type, such as Figure 3 He Ru Figure 7 Vertical flat top and curved bottom, such as Figure 4 He Ru Figure 8 Vertical flat top and folded bottom type.

[0026] The long-neck curved wind cabinet 42 has a long neck, and the inclined volute air outlet extends and curves to the range hood outlet 43 located on the horizontal plane, and then connects to the smoke cap. The volute main air inlet 45 is tilted downward and rearward, and the bottom of the wind cabinet is sunken to a position between 5cm above and 10cm below the horizontal plane of the platform frame 25. The rearward and downward direction of the volute main air inlet 45 has a wide external space, which facilitates the impeller 40 to absorb air, and functions similarly to a submersible pump, with submerged suction and strong suction. The angle between the impeller's mounting axis and the horizontal plane of the casing bottom is 15°-75°.

[0027] A left isolation guide plate 30 and a right isolation guide plate 33 are installed in the housing 12 of the range hood. The rear of the plates are tightly fitted with the cavity rear plate 31 of the housing 12, the top plate of the platform plate frame 25, the left plate 28, and the right plate 29, and are tightly fitted with the condensation baffle 23, forming a closed space on the left and right sides to isolate the airflow from entering the left and right sides of the housing 12, preventing the influence of airflow disturbance, and preventing grease from gathering at the left and right corners of the housing 12, thus playing the role of isolating oil smoke. The isolation guide plate also guides the airflow to the bottom area of ​​the wind cabinet quickly. The airflow passes through the area smoothly and unobstructed, which enhances the smoking effect and reduces noise. The isolation guide plate can play the role of reinforcing the housing. The isolation guide plate can have a variety of shapes, such as: Figure 2 、 Figure 3 、 Figure 4 The left isolation guide plate 30 and the right isolation guide plate 33 are provided.

[0028] There is a half-width horizontal baffle 32 in the box body 12, which is located at the rear of the box body 12 and below the long-neck curved wind cabinet 42. The left side is connected to the upper part of the left isolation guide plate 30, and the right side is connected to the upper part of the right isolation guide plate 33. The horizontal baffle 32 is installed horizontally and can also be tilted appropriately to play a role in separating some oil smoke and strengthening the overall structure of the range hood. At the same time, it can also prevent large foreign objects (such as vegetable leaves and plastic bags) from being sucked into the wind wheel 40 due to improper operation.

[0029] The space formed by the left isolation guide plate 30, the cavity rear plate 31, the right isolation guide plate 33, the wind cabinet 42, and the condensation baffle 23 is spacious and has a large cross-sectional area for the airflow runoff. The airflow speed in this space is relatively slow, and the oil smoke condenses in this area, which is conducive to further oil smoke separation. The amount of gas at the front end of the volute main air inlet 45 is large, and there is enough gas for the impeller 40 to inhale instantly, which naturally generates strong wind force. The cross-sectional area of ​​the entire air intake channel is large. Even if the interior of the cavity is not cleaned during long-term use of the range hood, even if the oil and dirt accumulate thickly, it will not block the channel and will not affect the oil smoke extraction effect.

[0030] The impeller 40 is installed at an angle, so its blades are never horizontal at any time or in any state. The tilted blades prevent oil accumulation, extending the service life of the impeller. The range hood has a timer function, which, when activated at the end of operation, can also effectively reduce the impact of residual oil droplets on the range hood. An oil drip hole 44 is located at the bottom of the wind cabinet, and an oil receiving hole 35 is located at the bottom of the range hood.

[0031] Observing from the air outlet 43 of the range hood towards the interior, one can directly pass through the blades of the wind wheel 40, the center of the wind wheel 40, the main air inlet 45 of the volute, the gap of the horizontal baffle 32, and the air inlet 39 of the range hood. The airflow is unobstructed, and the smoke is directly sucked in and discharged, so the oil smoke extraction effect is naturally good.

[0032] When the range hood is installed, the general installation height is at a position where the oil cup 36 is 40-50CM away from the stove surface (about 45CM is optimal). The area below the switch panel 21 of the range hood is a smoke collection area, and the smoke collection area formed is large. The air inlet 39 of the range hood is located at the lower rear part of the box body 12. The fan shape with the air inlet as the center can reach 135 degrees, which can accurately sweep across the pot surface and effectively smoke the oil.

[0033] The range hood has a simple appearance, with most surfaces consisting of a single plane, making it easy to clean. After use, users only need to wipe the smooth surface of the range hood. If the range hood is not under repair, it does not need to be disassembled for cleaning. If cleaning the interior is necessary, no tools are required. Simply press the switch panel 21 flat with both hands and remove the diagonally hanging condensation baffle 23 to clean the interior of the cavity easily and conveniently.

[0034] The front-to-back dimensions of the range hood are controlled within 42cm, typically around 36cm, ensuring they won't bump against people's heads or obstruct vision during use. The overall height is controlled within 90cm, typically around 81cm, minimizing the range hood's bulk and saving on production material costs. The range hood has a simple structure, lacking flashy auxiliary functions like opening and closing, lifting, or garbled colors, making it easy to manufacture. It also offers excellent fume extraction, low noise, and is convenient to use, clean, and maintain, making it highly practical and readily available for widespread adoption.

Claims

1. A direct suction and direct exhaust range hood, consisting of two parts; the upper part includes a motor, a fan, a wind cabinet, a hood, a circuit board, and a casing. The circuit board and the hood are installed on the top of the casing, and the wind cabinet with a long-neck curved air duct and a sunken volute is installed in the casing. The motor and the centrifugal fan are installed inside the volute. Air can enter both sides of the volute, and the main air inlet of the volute is obliquely facing backward and downward; the lower part includes a platform plate frame, a cavity rear plate, a rear shell plate, a left plate, a right plate, a left isolation guide plate, a right isolation guide plate, a horizontal baffle, Condensation baffle, switch panel, strip oil cup; the box body is composed of a platform frame, a rear shell plate, a left plate, and a right plate. The box body is connected to the bottom of the casing, and a strip oil cup is hung on the bottom of the box body. The cavity rear plate, the left isolation guide plate, and the right isolation guide plate are installed in the box body. The upper part is equipped with a horizontal baffle, and a rectangular condensation baffle is hung obliquely in the front. The strip air inlet of the range hood is located at the bottom of the condensation plate and the rear part of the lower part of the box body. The switch panel with a plum blossom buckle is bonded to the front of the platform frame plate, and the switch panel contains a switch with a delay function.

2. The range hood according to claim 1, characterized in that: The wind cabinet has a long-necked air outlet and is curved, the volute of the wind cabinet is sunken, the axis of the impeller installed in the wind cabinet forms an acute angle with the horizontal plane, and the main air inlet of the wind cabinet is tilted backward and downward; the bottom of the wind cabinet is sunk to the corresponding horizontal position of the platform frame within the range of 5CM above and 10CM below. The external space of the main air inlet of the volute facing backward and downward is wide, which is convenient for the wind wheel to take in air, and plays a similar function to that of a submersible pump, with submerged suction and strong suction performance.

3. The range hood according to claim 1, characterized in that: Baffles are installed on the left and right sides of the box to isolate, guide, and reinforce the airflow. They prevent airflow from entering the left and right corners of the box, preventing grease from accumulating there. They also block airflow disturbances and guide airflow quickly into the impeller. This ensures smooth, unobstructed airflow through the area, enhancing the smoking experience and reducing noise. The baffles also reinforce the box structure.

4. The range hood according to claim 1, characterized in that: There is a half-width horizontal guard net in the middle. The horizontal guard net plays the role of reinforcing the overall structure of the range hood, while also playing a role in separating some oil smoke, and can also prevent large foreign objects from being sucked into the wind wheel due to improper operation.

5. The range hood according to claim 1, characterized in that: A wide space is formed from the back of the condensation plate to the wind cabinet, with a large cross-sectional area of ​​the airflow. The surface area of ​​the cavity formed by the condensation plate and the shell is large. The airflow speed in this space slows down, and the condensed oil droplets and water droplets can be more attached to the cavity surface, which is conducive to further separation of oil smoke.

6. The range hood according to claim 1, characterized in that: The impeller is installed at an angle, and the blades of the impeller are not horizontal at any time, which makes it difficult for oil to accumulate, delaying the service life of the impeller. The range hood has a delay function. Using the delay function at the end can also effectively reduce the impact of oil smoke on the range hood.

7. The range hood according to claim 1, characterized in that: The whole machine has a simple appearance and is easy to clean. After use, the user only needs to wipe the smooth surface of the range hood without disassembling and cleaning. If you really need to clean the inside, no tools are required. You only need to use both hands to flatly pull the switch panel and then remove the condensation baffle. It is easy and convenient.

8. The range hood according to claim 1, characterized in that: Observing from the air outlet of the range hood to the inside of the range hood, your eyes can directly pass through the impeller blades, the center of the impeller, the main air inlet of the wind cabinet, the gap in the screen, and see the air inlet of the range hood. The airflow is unobstructed, and the submerged suction type directly sucks and exhausts, so the oil fume extraction effect is naturally good.

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