WO2010105391A1

WO2010105391A1 - A fume ventilator with a guide plate

Info

Publication number: WO2010105391A1
Application number: PCT/CN2009/000769
Authority: WO
Inventors: 李斌; 董一龙; 赵沛彪; 茅忠群; 诸永定; 曹亚裙
Original assignee: 宁波方太厨具有限公司
Priority date: 2009-03-18
Filing date: 2009-07-06
Publication date: 2010-09-23
Also published as: CN101514823B; CN101514823A

Abstract

A fume ventilator with a guide plate includes: a housing body (3), an exhaust hood（2）and a guide plate (1) for oil fumes. The plate(4) faces to a chimney on the exhaust hood（2）. There is an expected spacing between the plate (1) and the hood（2）. Thus channel（7）of oil fumes is formed between the plate (1) and the hood（2）. The oil fumes flow uniformly along the guide plate (1).The channel（7）has a Venturing effect structure, the spacing distance becomes smaller from peripheral sides of the plate（1） to the chimney（7）.That helps the oil fumes sucked with high speed.

Description

Range hood with smoke guide

Technical field

The invention relates to a kitchen cooking smoke exhausting device, in particular to a range hood with a smoke guiding plate. Background technique

China utility model patent ZL00263535.6 "Full-circumferential deflector of the range hood" has improved the traditional range hood. The structure is: a predetermined fan is arranged in the casing, and the casing is positioned relative to the fan. There is an air inlet and an air outlet, and a deflector is arranged at the end side of the air inlet of the casing, and the deflector and the air inlet are kept at a predetermined distance, and the periphery of the deflector and the inner side of the casing are respectively The peripheral space also maintains a predetermined spacing and forms a full-circle-circulation smoke guiding port. When the fan is operated, the soot is sucked and discharged by the respective smoke guiding ports around the deflector. Although the patent improves the efficiency of exhausting smoke to a certain extent, there are still some shortcomings: First, the periphery of the deflector is the inlet passage of the oil smoke, and the fan is located at the rear of the deflector in the middle, so the travel of the soot is required. The bypass is first bypassed and then bent to the middle, which causes the soot in four directions to interfere with each other easily by the fan. On the one hand, the noise is significantly increased, on the other hand, the actual exhaust efficiency is also affected. Second, because the deflector The surrounding area is suspended, and the back of the deflector will inevitably have oil droplets formed and drip down the deflector. This will seriously affect the user's mood and also appear unsanitary, so the lower edge of the deflector It needs to be overlapped on the inner side of the baffle plate. On the one hand, the overall appearance of the fume hood is very irregular. On the other hand, the soot that enters the suction port through the lower end edge of the baffle needs to climb to the edge of the baffle. Then fold down and fold from the lower end edge of the deflector to the suction opening, so that the soot flow passage of the part becomes very tortuous, especially with a downwardly bent portion. It is very unfavorable to the flow of high-temperature soot, thus affecting the actual exhaust efficiency; in addition, the lower divergence of the fume at the lower part is relatively concentrated, so the lower smoke guide is a very important exhaust passage, obviously having the above-mentioned bend The design of the shape fume passage is difficult to achieve satisfactory results. Summary of the invention

The technical problem to be solved by the present invention is to provide a range hood with a smoke guiding plate which has a good rectifying effect and a quick suction of the soot.

The technical solution adopted by the invention to solve the above technical problem is: a range hood with a smoke guide plate, which has a body, a collecting hood and a smoke guiding plate, and an air inlet is arranged on the collecting hood, and the smoke guiding plate is positive Providing the air inlet and maintaining a predetermined distance from the hood, so that a soot passage through which the oil smoke passes is formed between the smoke guide and the hood, and is characterized by corresponding to the soot passage The distance between the smoke guide plate and the collecting hood gradually decreases from the outer circumference of the tobacco guiding plate toward the air inlet. Preferably, the two sides of the air inlet end of the hood have a convex side outer portion, and the middle portion has a concave air inlet portion, and correspondingly, the two sides of the smoke guide plate and the air inlet end of the hood are maintained. a predetermined distance to form a side longitudinal air inlet port between the side peripheral portion of the hood, the side longitudinal air inlet channel being curved inwardly to form a lateral lateral air inlet soot passage, the side lateral air inlet soot passage The spacing is gradually reduced from the outside to the inside.

Preferably, the lateral cross-sectional oil fume passage has a longitudinal section inclination angle of α, and α is an acute angle of 30 or less, preferably 7°.

Further enhancing the Venturi effect and accelerating the soot, the starting aperture of the side longitudinal air inlet passage is smaller than the starting aperture of the lateral lateral inlet soot passage.

Preferably, the front end portion of the air inlet end face of the hood has a convex front outer portion, and the middle portion has a concave air inlet portion, and correspondingly, the front end portion of the smoke guide plate and the air inlet end face of the hood Maintaining a predetermined distance to form a front longitudinal air inlet port with a front outer peripheral portion of the hood, the front longitudinal air inlet channel being curved inwardly to form a front lateral air inlet soot passage, the front transverse air inlet soot passage The spacing at the point is gradually reduced from the outside to the inside.

Preferably, the front transverse air inlet soot passage has a longitudinal section inclination of 3, and β is an acute angle of 30 or less, preferably 18°.

Further enhancing the Venturi effect and accelerating the range soot, the starting aperture of the front longitudinal air inlet passage is smaller than the starting aperture of the front transverse air inlet soot passage.

For ease of production, the smoke guide plate is horizontal, and the end face of the air inlet of the fume collecting hood is smoothly transitioned from the outer to the middle and gradually protrudes downward until the air inlet of the fume collecting hood.

Compared with the prior art, the invention has the advantages that: the smoke guide plate is used to form the Coanda effect, the soot flows uniformly, and no cross flow occurs, and the spacing between the smoke guide plate and the collecting hood is from the outer circumferential direction to the air inlet opening. The gradual reduction of the trend makes it easy to form the Venturi effect, which accelerates the smoke to be sucked away by the fan, so that the soot absorbs faster and cleaner. DRAWINGS

Figure 1 is a schematic view showing the structure of the embodiment.

Figure 2 is a schematic view of the structure after removing the casing.

Figure 3 is a cross-sectional view along the Α-Α direction (no oil sump).

Figure 4 is a cross-sectional view along the B-B direction (no oil sump). detailed description

The invention will be further described in detail below with reference to the embodiments of the drawings.

Embodiments: Referring to FIG. 1 and FIG. 2, the embodiment includes a smoke guide plate 1, a hood 2 and a body 3. The smoke guide plate 1 is horizontal, the oil collecting groove 5 is on the inner side, and the smoke guide plate 1 passes through two bolts. 4 is disposed on the end face of the air inlet of the collecting hood 2, The collecting hood 2 has a central air inlet 10 (shown in Figures 3 and 4), and the body 33 has a fan and has an air outlet. As shown in FIG. 3 and FIG. 4, the front end portion and the two sides of the air inlet end face of the hood 2 are downwardly convex, respectively forming a front outer peripheral portion 23 and a side outer peripheral portion 22, and the entire central recess is formed into the air inlet portion 21, and The air inlet portion 21 smoothly transitions from the edge toward the center and gradually bulges downward until the air inlet 10 of the hood.

The front and rear ends and the two sides of the smoke guide plate 1 are kept at a certain reserved distance from the air inlet end face of the hood 2, so that a side longitudinal air inlet 6 and a front are formed between the smoke guide plate 1 and the hood 2 The longitudinal air inlet 9 and the position between the rear end portion of the tobacco guide 1 and the collecting hood 2 are provided with the aforementioned oil collecting groove 5 to accommodate the condensed oil.

As shown in FIG. 3 and FIG. 4, the side longitudinal air inlet 6 is curved inwardly to form a lateral lateral air inlet fume passage 7, and the side lateral air inlet fume passage 7 is between the smoke guiding plate 1 and the collecting hood 2 The pitch is gradually decreased from the outside to the inside, and the longitudinal cross-sectional inclination angle of the lateral lateral air-intake fume passage 7 is α, and α is an acute angle of 30 or less, preferably 7°. The front longitudinal air inlet 9 channel is bent inward to form a front lateral air inlet fume passage 8, and the distance between the front horizontal inlet fume passage 8 and the fume collecting hood 2 is also gradually decreased from the outer to the inner, the front The longitudinal cross-section of the lateral inlet fume passage 8 is β, and β is an acute angle of 30 or less, preferably 18°.

The front longitudinal air inlet 9 is smaller than the starting diameter of the front transverse air inlet soot channel 8; the side longitudinal air inlet 6 has a starting aperture smaller than the starting diameter of the lateral transverse air inlet soot channel 7.

Working principle: The soot gas encounters the smoke guide plate 1 during the rising process, and then forms the Coanda effect (ie, the wall effect), and the soot crawls along the wall of the smoke guide plate 1 so that the soot flow becomes uniform and the soot gas It will also flow in a certain direction, and no cross-flow will occur, which will serve as a rectification. After a certain length of crawling, the temperature of the soot is rapidly reduced, thereby condensing.

Since the distance between the side guide air duct passage 7 and the front lateral air inlet soot passage 8 and the smoke collecting hood 2 is gradually decreased from the outside to the inside, thereby the front and the left of the smoke guide panel. The right three sides form a chimney-like venturi effect, which accelerates the entry of the soot gas into the body 3, so that the soot is sucked faster and cleaner, and the smoke guide plate 1 can be flat or curved.

Claims

Rights request

1. A range hood with a smoke guiding plate, comprising a body, a collecting hood and a smoke guiding plate, wherein the collecting hood is provided with an air inlet, the guiding plate is arranged for the air inlet and is kept with the collecting hood a predetermined spacing, so that a soot passage through which the oil smoke passes is formed between the smoke guide and the hood, and is characterized by corresponding to the smoke guide between the smoke passage and the hood The spacing gradually decreases from the outer circumference of the smoke guide plate toward the air inlet.

2. The range hood with a smoke guide according to claim 1, wherein the hood of the hood has a convex side peripheral portion on both sides of the air inlet end, and a concave inlet portion in the middle portion, correspondingly The two sides of the smoke guiding plate are kept at a certain reserved distance from the end surface of the air inlet of the hood to form a side longitudinal air inlet port with a side outer peripheral portion of the hood, and the side longitudinal air inlet channel is oriented The inner bend forms a lateral cross-intake soot passage, and the spacing at the lateral cross-intake soot passage gradually decreases from the outer to the inner.

The smoke hood with a smoke guide according to claim 2, characterized in that the longitudinal cross-sectional inclination angle of the lateral lateral air-intake duct is ^, and α is an acute angle of 30 or less.

4. The smoke hood with a smoke guide according to claim 3, wherein the initial longitudinal diameter of the side longitudinal air inlet passage is smaller than the initial diameter of the side transverse air inlet soot passage.

The smoke hood with a smoke guide according to claim 2, wherein the front end portion of the air inlet of the hood has a convex front outer portion, and the central portion has a concave air inlet portion, correspondingly a front end portion of the smoke guide plate is kept at a predetermined distance from an end surface of the air inlet of the hood to form a front longitudinal air inlet port with a front outer peripheral portion of the hood, the front longitudinal air inlet passage Inwardly curved to form a front transverse air inlet soot passage, the spacing at the front transverse inlet soot passage gradually decreasing from the outside to the inside.

A smoke hood with a smoke guide according to claim 5, wherein said front transverse air inlet duct has a longitudinal section inclination angle of β, and β is an acute angle of 30 or less.

7. The smoke hood with a smoke guide according to claim 6, wherein the front longitudinal air inlet passage has a starting aperture smaller than a starting diameter of the front transverse air inlet soot passage.

The smoke hood with a smoke guide according to any one of claims 1 to 7, wherein the smoke guide plate is horizontal, and the end face of the air inlet of the hood is outwardly oriented. The middle smooth transition and gradually bulges downward until the air inlet of the collecting hood.