Smoke inlet system for range hood and range hood

Abstract

The invention relates to the technical field of range hoods, in particular to a range hood smoke inlet system and a range hood, the range hood smoke inlet system comprises a smoke collecting cavity channel, a main plate, an oil filter screen and a negative pressure plate, the smoke collecting cavity channel is provided with an inlet located in the lower end and a discharge port located in the top end, and the main plate is installed at the inlet position of the smoke collecting cavity channel; the negative pressure plate is connected with the main plate through a connecting assembly, a negative pressure adsorption opening allowing smoke to flow into the smoke collecting cavity channel is formed between the negative pressure plate and the main plate, and the oil filter screen is installed at an inlet of the smoke collecting cavity channel. According to the smoke inlet system, through the design of the main plate and the negative pressure plate, the negative pressure adsorption opening is formed between the main plate and the negative pressure plate, the design of a smoke collecting cavity is abandoned, the structure is lighter and more attractive, and through the design of a connecting assembly between the main plate and the negative pressure plate, distribution of negative pressure is optimized, and the smoke suction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and more particularly to a smoke inlet system for a range hood and the range hood. Background Art

[0002] Range hoods are an indispensable appliance in modern kitchens. Their primary function is to extract cooking fumes through negative pressure, maintaining clean kitchen air. Existing range hoods typically consist of a smoke collection duct with a built-in fan assembly, a filter, a control system, and other components. A smoke collection chamber is located beneath the smoke collection duct, collecting fumes in the chamber before exhausting them through the smoke collection duct.

[0003] The design in the prior art has the following problems: Uneven negative pressure distribution: Traditional range hoods typically feature a fixed opening, without adjusting the negative pressure distribution based on actual usage. This results in insufficient extraction efficiency in the core area and wasted negative pressure in non-core areas. Due to the poor design of the negative pressure zone, oil smoke easily spreads to non-core areas, reducing overall extraction efficiency.

[0004] The design of the smoke collection cavity greatly increases the size of the range hood and is not aesthetically pleasing. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned problems existing in range hoods and to provide a smoke intake system for range hoods, which optimizes negative pressure distribution, improves smoke extraction efficiency, and enhances aesthetics.

[0006] In a first aspect of the present invention, a smoke intake system for a range hood is provided, which adopts the following technical solution: A smoke intake system for a range hood, comprising: A smoke collecting chamber, a main board, an oil filter and a negative pressure plate. The smoke collecting chamber has an inlet at the lower end and an exhaust port at the top. The main board is installed at the inlet of the smoke collecting chamber. The negative pressure plate and the main board are connected by a connecting component. A negative pressure adsorption port for smoke gas to flow into the smoke collecting chamber is formed between the negative pressure plate and the main board. The oil filter is installed at the inlet of the smoke collecting chamber.

[0007] Preferably, the connecting assembly includes a fixing seat and a negative pressure regulating member, the fixing seat is connected to the main board, the upper end of the negative pressure regulating member is connected to the fixing seat, and the lower end is connected to the negative pressure plate.

[0008] Preferably, the negative pressure adjusting member includes a supporting and fixing portion and a connecting and adjusting portion, the supporting and fixing portion is arranged near the front end of the negative pressure plate, the connecting and adjusting portion is located behind the supporting and fixing portion, and the connecting and adjusting portion is rotatably connected to the fixing seat.

[0009] Preferably, an adjustment structure is provided on the front portion of the upper surface of the negative pressure plate to adjust the distribution of negative pressure at the negative pressure adsorption port.

[0010] Preferably, the main board includes a top plate, a front end plate and a rear end plate, the front end plate has a built-in control component, and an oil collecting tank is provided below the rear end plate.

[0011] Preferably, the adjustment structure is a connecting strip structure with ridges, and both ends of the adjustment structure are respectively connected to adjacent supporting and fixing parts.

[0012] Preferably, the connection adjustment part includes a horizontal part and a vertical part, the horizontal part is connected to the negative pressure plate, and the end of the horizontal part is connected to the supporting fixed part, and the vertical part is rotationally connected to the fixed seat through a movable adjustment structure.

[0013] Preferably, the movable adjustment structure includes an adjustment groove formed on the fixing seat and an adjustment pin passing through the connecting adjustment portion, and the end of the adjustment pin is slidably embedded in the adjustment groove.

[0014] Preferably, the adjustment groove includes a high point and a low point, and the height of the support position of the adjustment groove for the adjustment pin gradually decreases from the high point to the low point, and a limiting boss is provided at the notch position of the adjustment groove.

[0015] Preferably, the negative pressure plate includes a substantially flat plate body, a concave portion is formed in the middle of the plate body in a direction away from the lower surface of the plate body, and a dirty oil flow channel is formed on the upper surface of the concave portion.

[0016] Preferably, the concave portion is arranged to be inclined, and the height of the top surface of the concave portion gradually decreases from the front end to the rear end of the range hood.

[0017] Preferably, the negative pressure plate includes a substantially flat plate body, a convex portion is formed in the middle of the plate body and convexly projects away from the upper surface of the plate body, and a dirty oil flow channel is formed on the upper surface of the convex portion.

[0018] Preferably, a negative pressure regulating hole is provided on the concave portion or the convex portion and passes through the plate in the thickness direction.

[0019] Preferably, a negative pressure regulating strip is provided on the oil filter net, and the projection position of the negative pressure regulating strip corresponds to the concave portion or the convex portion. Preferably, the negative pressure regulating holes on the convex portion are located on both sides of the convex portion.

[0020] Preferably, the convex portion is arranged to be inclined, and the bottom surface height of the convex portion gradually decreases from the front end to the rear end of the range hood.

[0021] A second aspect of the present invention provides a range hood, particularly an ultra-thin range hood, which adopts the above-mentioned smoke intake system.

[0022] By implementing the above technical solution, the present invention has the following beneficial effects: 1. The present invention forms a negative pressure adsorption port between the main board and the negative pressure plate through the design of the main board and the negative pressure plate, abandons the design of the smoke collecting cavity, and forms an ultra-thin range hood with a lighter and more beautiful structure.

[0023] 2. The present invention optimizes the distribution of negative pressure and improves smoking efficiency through the design of the connecting components between the main board and the negative pressure plate.

[0024] 3. The present invention improves the connection structure of the negative pressure plate so that the negative pressure plate does not interfere with the rear end plate of the main plate when rotating.

[0025] 4. The present invention improves the structure of the negative pressure plate, so that a negative pressure adsorption port can be formed between the main board and the negative pressure plate, thereby achieving a better negative pressure adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings: Figure 1 This is a schematic structural diagram of the range hood smoke intake system shown in Example 1 of the present invention; Figure 2 This is a partial structural diagram of the smoke inlet system in Example 1 of the present invention; Figure 3 This is a schematic structural diagram of a connection assembly according to embodiment 1 of the present invention; Figure 4 This is a schematic structural diagram of a fixing base according to embodiment 1 of the present invention; Figure 5 Schematic diagram of the structure of the negative pressure plate in Example 2 of the present invention; Figure 6 This is a schematic structural diagram of the oil filter in Example 2 of the present invention; Figure 7 This is a schematic structural diagram of the negative pressure plate in Example 3 of the present invention.

[0027] 100-smoke collecting chamber, 200-oil filter, 201-negative pressure adjustment strip, 300-main board, 301-top board, 302-front end board, 303-rear end board, 304-control assembly, 305-oil collecting tank, 400-negative pressure plate, 401-negative pressure adsorption port, 402-concave part, 402a-negative pressure adjustment hole 1, 403-convex part, 403a-negative pressure adjustment hole 2, 500-connecting assembly, 501-fixing seat, 5011-adjustment groove, 502-negative pressure adjustment member, 5021-support fixing part, 5022-connection adjustment part, 50212a-horizontal part, 5022b-vertical part, 5023-adjustment structure, 5023a-ridge. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the configuration or usage scenarios of the range hood as shown in the accompanying drawings, and may vary depending on the location or usage of the range hood. Therefore, these or other directional terms should not be construed as restrictive. Example 1

[0030] This embodiment provides a smoke intake system for use on a range hood. The structure of the smoke intake system is shown in FIG. Figure 1 The smoke collection chamber 100 is located at the top, with a smoke inlet at the bottom and a smoke outlet at the top. A fan assembly is located within the smoke collection chamber 100 to generate negative pressure, a structure similar to that used in the prior art. An oil filter 200 is installed at the outlet of the smoke collection chamber 100 to filter out oil from the smoke entering the chamber.

[0031] The smoke intake system of this embodiment further includes a main board 300, which is installed at the entrance of the smoke collection chamber 100. The main board 300 includes a top plate 301, a front plate 302, and a rear plate 303. An opening is provided in the middle of the top plate 301, which corresponds to the entrance of the smoke collection chamber 100. The front plate 302 has a built-in control assembly 304, and the lower end of the rear plate 303 is fixedly mounted with an oil collection tank 305.

[0032] The smoke intake system of this embodiment also includes a negative pressure plate 400, which is located below the top plate 301 of the main plate 300 and is a flat thin plate structure. The negative pressure plate 400 is connected to the main plate 300 via a connecting assembly 500, so that a negative pressure adsorption port 401 is provided between the negative pressure plate 400 and the main plate 300 for smoke to flow into the smoke collection chamber 100. The negative pressure adsorption port 401 mainly includes a front negative pressure adsorption port, a left negative pressure adsorption port, and a right negative pressure adsorption port (the front, left, and right here are defined with the front plate as the front). The rear end of the negative pressure plate 400 overlaps the edge of the oil collecting tank 305, and the end extends directly above the oil collecting tank 305 to guide the oil on the negative pressure plate 400 into the oil collecting tank 305 for collection. Edges are provided on the front, left, and right edges of the negative pressure plate 400 to prevent oil from dripping from these three sides.

[0033] In this embodiment, the structure of the connecting assembly 500 is specially designed, see Figure 2 The connecting assembly 500 includes two parts, a fixing seat 501 and a negative pressure regulating member 502, wherein the fixing seat 501 is fixedly connected to the lower surface of the top plate 301 of the main board 300, and there are two fixing seats 501, which are arranged near the left and right sides of the top plate 301 respectively.

[0034] The upper end of the negative pressure regulating member 502 is connected to the fixed seat 501, and the lower end is fixedly connected to the negative pressure plate 400. Two negative pressure regulating members 502 are provided: a left negative pressure regulating member and a right negative pressure regulating member, one corresponding to each of the two fixed seats 501. The negative pressure regulating members 502 connect the fixed seat 501 and the negative pressure plate 400, cooperating with the fixed seat 501 to control the distance between the top plate 301 and the negative pressure plate 400, and also adjust the distribution of negative pressure at the negative pressure suction port 401.

[0035] See also Figure 3 Each negative pressure regulating member 502 includes a supporting and fixing portion 5021 and a connecting and adjusting portion 5022, wherein the supporting and fixing portion 5021 is close to the front end of the negative pressure plate 400 and is generally cylindrical. The top end can be inserted into the socket on the fixing seat 501 for connection, and the bottom end is fixedly connected or integrally connected to the negative pressure plate 400. An adjusting structure 5023 is provided between the supporting and fixing portions of the two negative pressure regulating members 502 to adjust the distribution of the adsorption negative pressure entering from the negative pressure adsorption port 401 at the front end of the negative pressure plate 400. The adjusting structure 5023 is a connecting strip structure with a ridge 5023a in the middle. Through the provision of the ridge, the negative pressure is differentially distributed at each negative pressure adsorbent position, increasing the local negative pressure while reducing the negative pressure in other parts. This optimizes the negative pressure adsorption of oil smoke, reduces the diffusion of oil smoke, and enhances the effect of centralized adsorption.

[0036] The connection and adjustment portion 5022 is located behind the support and fixing portion 5021. It is fixedly connected to the negative pressure plate 400 and in contact with the support and fixing portion 5021. It can be connected or disconnected, and can be separate or integrated. The connection and adjustment portion 5022 includes a horizontal portion 5022a and a vertical portion 5022b. The horizontal portion 5022a is fixedly connected to the negative pressure plate 400. The height of the two ends of the horizontal portion 5022a is greater than the height of the middle portion. This arrangement allows for targeted distribution of the negative pressure at the side negative pressure adsorption ports 401, increasing the local (central) negative pressure and improving the side's flue gas adsorption efficiency. The lower portion of the support and fixing portion 5021 is also thickened to facilitate the adjustment of negative pressure in conjunction with the adjustment structure and the horizontal portion of the connection and adjustment portion 5022.

[0037] The top of the vertical portion 5022b of the connection adjustment portion 5022 is movably connected to the fixing seat 501, see Figure 4 Specific structure: A groove is formed at the corresponding position of the fixed seat 501, and an adjustment groove 5011 is formed on the inner wall of the groove. The adjustment pin passes through the top of the vertical portion of the connecting adjustment part 5022, and the two ends of the adjustment pin are slidably embedded in the adjustment groove 5011. The adjustment groove 5011 includes a high point and a low point. From the high point to the low point, the height of the support position of the adjustment groove 5011 for the adjustment pin gradually decreases. A limiting boss is provided at the notch position of the adjustment groove 5011. Since the rear end of the negative pressure plate 400 needs to support the oil collecting tank 305, when the negative pressure plate 400 is rotated to adjust its angle or when the negative pressure plate 400 is removed, it will cause interference with the rear end plate 303. In this embodiment, such a configuration avoids interference between the negative pressure plate 400 and the rear end plate 303 when the negative pressure plate 400 is rotated. During operation, first press down the front end of the negative pressure plate with a little force so that the supporting fixing part 5021 is separated from the fixing seat 501. At this time, under the action of the gravity of the negative pressure plate 400, the adjusting pin is driven forward and downward along the adjusting slot, so that the negative pressure plate 400 can be rotated at will without interference from the rear end plate 303 and the oil collecting tank 305.

[0038] In this embodiment, the negative pressure regulating member 502 is a hollow structure, which can save materials, reduce weight, and make the smoke intake system more lightweight. Example 2

[0039] The difference between this embodiment and embodiment 1 is that the structure of the negative pressure plate 400 is optimized. Figure 5The negative pressure plate 400 in this embodiment includes a plate body that is generally flat. A concave portion 402 is formed in the middle of the plate body, concave inward away from the lower surface of the plate body. The concave portion 402 is strip-shaped, pointing from the front plate 302 to the rear plate 303. The concave portion 402 is slightly concave in the middle of the concave portion 402, and a strip-shaped negative pressure regulating hole 402a is provided at the concave position, penetrating the plate body in the thickness direction. Dirty oil flow channels are formed on both sides of the negative pressure regulating hole 402a. The concave portion 402 is inclined, and the top surface height of the concave portion 402 gradually decreases from the front plate 302 to the rear plate 303. When the oil smoke reaches the negative pressure plate 400, its speed is very high, which makes it extremely easy for the oil smoke to be dispersed, and the dispersion range is also larger, resulting in poor oil smoke suction effect. The concave portion 402 can slow down the speed of the oil smoke when it reaches the negative pressure plate 400, reducing the diffusion range. At the same time, the concave portion 402 can also collect the oil smoke and draw it in through the negative pressure at the negative pressure regulating hole 402a. In conjunction with the negative pressure adsorption port, this can achieve efficient oil smoke extraction. Corresponding to the concave portion 402, the oil filter 200 is provided with a negative pressure regulating strip 201, see Figure 6 As shown, the structure of the oil filter 200 has been optimized. The oil filter 200 is arranged higher in the center and lower on the left and right sides. The highest position corresponds to the concave portion 402 or the convex portion 403, and the negative pressure adjustment bar 201 is also located at the highest position. This arrangement not only increases the effective area of the oil filter 200 but also has a certain effect on collecting oil smoke, improving the suction effect. Example 3

[0040] The difference between this embodiment and embodiment 1 is that the structure of the negative pressure plate 400 is optimized. Figure 7 The negative pressure plate 400 in this embodiment comprises a generally flat plate body. A convex portion 403 is formed in the middle of the plate body, projecting outward toward the lower surface. A contaminated oil flow channel is formed on the upper surface of the convex portion 403. Negative pressure adjustment holes 403a are provided on both sides of the convex portion 403. The convex portion is arranged at an angle, pointing from the front plate 302 to the rear plate 303. The upper surface of the convex portion 403 gradually decreases in height to facilitate the discharge of contaminated oil from the contaminated oil channel into the oil collection trough. Like the concave portion 402, the convex portion 403 also slows the velocity of oil smoke upon reaching the negative pressure plate 400, reducing its diffusion range. However, if the negative pressure adjustment holes were located on the convex portion 403, as in the concave portion 402, efficient oil smoke absorption would not be achieved. However, placing the negative pressure adjustment holes on the two sides of the convex portion 403 would achieve the desired effect.

[0041] Corresponding to the convex portion 403 , a negative pressure regulating strip 201 is provided on the oil filter 200 .

Claims

1. A smoke inlet system for a range hood, characterized in that: The smoke collecting chamber (100) comprises a smoke collecting chamber (100), a main board (300), an oil filter (200) and a negative pressure plate (400). The smoke collecting chamber (100) has an inlet at the lower end and an outlet at the top end. The main board (300) is installed at the inlet of the smoke collecting chamber (100). The negative pressure plate (400) and the main board (300) are connected via a connecting assembly (500). A negative pressure adsorption port (401) for smoke to flow into the smoke collecting chamber (100) is formed between the negative pressure plate (400) and the main board (300). The oil filter (200) is installed at the inlet of the smoke collecting chamber (100).

2. The smoke inlet system for a range hood according to claim 1, characterized in that: The connecting assembly (500) comprises a fixing seat (501) and a negative pressure regulating member (502), wherein the fixing seat (501) is connected to the main board (300), and the upper end of the negative pressure regulating member (502) is connected to the fixing seat (501), and the lower end is connected to the negative pressure plate (400).

3. The smoke inlet system for a range hood according to claim 2, characterized in that: The negative pressure regulating member (502) comprises a supporting and fixing portion (5021) and a connecting and regulating portion (5022), wherein the supporting and fixing portion (5021) is arranged near the front end of the negative pressure plate (400), and the connecting and regulating portion (5022) is located behind the supporting and fixing portion (5021), and the connecting and regulating portion (5022) is rotatably connected to the fixing seat (501).

4. The smoke inlet system for a range hood according to claim 3, characterized in that: An adjustment structure (5023) is provided on the front portion of the upper surface of the negative pressure plate (400) for adjusting the distribution of negative pressure at the negative pressure adsorption port (401).

5. The smoke inlet system for a range hood according to claim 4, characterized in that: The adjustment structure (5023) is a connecting strip structure having a ridge (5023a), and both ends of the adjustment structure (5023) are respectively connected to adjacent supporting and fixing portions (5021).

6. The smoke inlet system for a range hood according to claim 4, characterized in that: The connection adjustment portion (5022) includes a horizontal portion (5022a) and a vertical portion (5022b), wherein the horizontal portion (5022a) is connected to the negative pressure plate (400), and an end portion of the horizontal portion (5022a) is connected to the supporting fixed portion (5021), and the vertical portion (5022b) is rotationally connected to the fixed seat (501) via a movable adjustment structure.

7. The smoke inlet system for a range hood according to claim 6, characterized in that: The movable adjustment structure comprises an adjustment slot (5011) formed on the fixing seat (501) and an adjustment pin passing through the connection adjustment portion (5022), and the end of the adjustment pin is slidably embedded in the adjustment slot (5011).

8. The smoke inlet system for a range hood according to claim 7, characterized in that: The adjustment groove (5011) comprises a high point and a low point. From the high point to the low point, the height of the support position of the adjustment groove (5011) for the adjustment pin gradually decreases. A limiting boss is provided at the notch position of the adjustment groove (5011).

9. The smoke inlet system for a range hood according to claim 6, characterized in that: The heights of the two ends of the horizontal portion are greater than that of the middle portion.

10. The smoke inlet system for a range hood according to claim 6 or 9, characterized in that: The diameter of the lower portion of the supporting and fixing portion (5021) is larger than the diameters of the middle portion and the upper portion.

11. The smoke inlet system for a range hood according to claim 1, characterized in that: The main board (300) comprises a top board (301), a front end board (302) and a rear end board (303); the front end board (302) has a built-in control component (304); and an oil collecting tank (305) is provided below the rear end board (303).

12. The smoke intake system for a range hood according to claim 1, characterized in that: The negative pressure plate (400) comprises a plate body that is approximately flat, wherein a concave portion (402) is formed inwardly in the middle of the plate body in a direction away from the lower surface of the plate body, and a dirty oil flow channel is formed on the upper surface of the convex portion (403).

13. The smoke inlet system for a range hood according to claim 12, characterized in that: The concave portion (402) is arranged in an inclined manner, and the height of the top surface of the concave portion (402) gradually decreases from the front end to the rear end of the range hood.

14. The smoke inlet system for a range hood according to claim 1, characterized in that: The negative pressure plate (400) comprises a plate body that is approximately flat, a convex portion (403) convex outwardly in the middle of the plate body in a direction away from the upper surface of the plate body, and a dirty oil flow channel is formed on the upper surface of the convex portion (403).

15. The smoke inlet system for a range hood according to claim 12 or 14, characterized in that: A negative pressure regulating hole is provided on the inner concave portion (402) or the outer convex portion (403) and passes through the plate in the thickness direction.

16. A range hood comprising the smoke intake system according to any one of claims 1 to 15.

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