CN112673213B

CN112673213B - Pollution prevention technology for smoke exhaust ventilator and fan

Info

Publication number: CN112673213B
Application number: CN201980057371.4A
Authority: CN
Inventors: 山口明彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-02
Filing date: 2019-09-27
Publication date: 2022-02-01
Anticipated expiration: 2039-09-27
Also published as: KR102324976B1; JP6549811B1; JP2020056562A; KR20210032540A; CN112673213A; WO2020071292A1

Abstract

The invention provides a smoke exhaust ventilator for collecting and discharging oil smoke generated in a kitchen and a technology capable of preventing pollution in a fan thereof. The fan F attached to the range hood is configured to send all the compressed air to the exhaust pipe D, and the flow sucks the oil smoke or dirt generated in the kitchen from the gap on the periphery of the range hood and then the oil smoke or dirt is discarded through the exhaust pipe.

Description

Pollution prevention technology for smoke exhaust ventilator and fan

Technical Field

The present invention realizes a technology capable of preventing pollution in a range hood collecting and discharging oil smoke generated in a kitchen and a fan thereof.

An inexpensive range hood collects and discharges only oil smoke generated in a kitchen by using a fan, but a structure in which a filter is provided to attach oil, dust, and the like and discharge only cleaned air is widespread. Also, there is known a technique of: when oil or dust accumulates in the filter, the filter is washed with water to remove the oil or dust, and the oil or dust is softened by irradiating the filter with microwaves as in patent document 1, thereby facilitating the washing. However, since oil and dust of the soot adhere not only to the filter but also to other kitchen equipment, it is necessary to perform manual cleaning and cleaning periodically.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-58092

In the technique of patent document 1, although cleaning is possible when oil or dust adheres to the filter to make it dirty or to reduce efficiency, the oil or dust adhering to the outside of the filter cannot be removed and can be removed only by hand. In addition, the contamination of the fan itself cannot be prevented.

The invention provides a technology for discharging oil or dust without attaching to the outside of a filter or a fan, and realizes a range hood without cleaning the outside of the filter or the fan.

Disclosure of Invention

Problems to be solved by the invention

In view of the above problems, the present invention proposes a technique for directly discharging oil or dust without adhering to a wall surface of a kitchen appliance or a fan, and realizes a range hood that does not require manual cleaning of the kitchen appliance in the past.

Means for solving the problems

The technical problem of the present invention is solved by the following means. A first aspect of the present invention provides a method for preventing contamination of a range hood, characterized in that at least half of compressed air generated by a fan is sent from one path to an exhaust path, the remaining part is sent from the other path to a rectification path in two parts, the rectification path is divided into two parts, one part is sent to a lower layer of a bottom plate of a rectification plate, the other part is sent to an auxiliary layer between a middle plate of the rectification plate and the bottom plate, and compressed air discharged from the auxiliary layer is ejected from a gap in the outer periphery of the range hood to the exhaust path through an upper surface of the middle plate.

A second aspect of the present invention provides a structure for preventing contamination of a range hood, the structure being disposed at an outlet of a casing surrounding a fan, an exhaust pipe, and a partition portion between rectifying plates, the structure being configured to divide compressed air discharged from the outlet generated by the fan into two parts, to blow half or more of the compressed air to an exhaust path and the remaining part of the compressed air to the rectifying paths, and having a central gap to blow the compressed air sent to the rectifying paths to a lower layer of a bottom plate of the rectifying plates, and the structure being configured to blow out the compressed air sent to an auxiliary layer between a middle plate of the rectifying plates and the bottom plate from a gap disposed at an outer periphery of the range hood to the exhaust path via an upper surface of the middle plate.

A third aspect of the present invention provides the contamination prevention structure of the range hood according to the second aspect, wherein a filter is provided so as to surround one or more compressed air ducts that send compressed air generated by the fan and discharged from the outlet of the housing to the flow rectification path.

A fourth aspect of the present invention provides the contamination prevention structure of the hood according to the second or third aspect, characterized in that one or more than one compressed air duct is provided, the compressed air duct blowing air from an upper side of a top wall provided on the intermediate plate to a lower side of the intermediate plate, and configured to blow air toward the exhaust path through compressed air of an upper surface of the intermediate plate from a space where the compressed air duct is not present.

A fifth aspect of the present invention provides the contamination prevention structure of the hood according to the fourth aspect of the present invention, characterized in that an outer periphery of the top wall is curved downward, and the contaminants sucked toward the lower layer of the floor panel pass through an inner side of the curve and are sucked by the negative pressure ejected from the gap of the outer periphery of the hood.

ADVANTAGEOUS EFFECTS OF INVENTION

As described in the first aspect of the present invention, half or more of the compressed air generated by the fan is sent from one path to the exhaust path, and the remaining part of the compressed air is sent from the other path to the rectification path, and the rectification path is divided into two parts, one part is sent to the lower layer of the bottom plate of the rectification plate, and the other part is sent to the auxiliary layer between the middle plate and the bottom plate of the rectification plate, and the compressed air discharged from the auxiliary layer is ejected from the gap at the outer periphery of the range hood to the exhaust path through the upper surface of the middle plate, so that the oil smoke or dirt generated in the kitchen does not pass through the fan, and therefore, the fan attached to the range hood is not contaminated by the oil smoke or dirt generated in the kitchen.

As described in the second aspect of the present invention, the partition portion disposed between the outlet of the casing surrounding the fan, the exhaust duct, and the rectifying plate is configured to divide the compressed air discharged from the outlet generated by the fan into two parts, send half or more of the compressed air to the exhaust path, send the remaining part of the compressed air to the rectifying path, and have a central gap that sends the compressed air sent to the rectifying path to the lower layer of the bottom plate of the rectifying plate, and is configured to spout the compressed air sent to the auxiliary layer between the middle plate of the rectifying plate and the bottom plate from the gap disposed at the outer periphery of the hood to the exhaust path via the upper surface of the middle plate, so that the attached fan is not contaminated by the oil smoke or dirt generated in the kitchen.

As described in the third aspect of the present invention, the filter is provided so as to surround one or more compressed air ducts that send compressed air generated by the fan and discharged from the outlet to the rectification path, and thus dirt discharged from the kitchen is first attached to the filter and discarded together with the filter.

As described in the fourth aspect of the present invention, one or more than one forced draft ducts are disposed, the forced draft ducts are configured to blow air from the upper side of the top wall disposed on the intermediate plate to the lower side of the intermediate plate, and are configured to blow air toward the exhaust path through the forced air on the upper surface of the intermediate plate from a space where the forced draft ducts are not present, dirt such as soot generated in a kitchen is sucked to the lower layer of the floor panel, and then is sent to the exhaust path by negative pressure generated by a gap in the outer periphery of the hood and is discharged, and dirt discharged from the kitchen is not attached to the wall surface of the hood or the like.

In the fifth aspect of the present invention, the outer periphery of the top wall is curved downward, and the contaminants sucked toward the lower layer of the bottom plate are sucked by the negative pressure discharged from the gap in the outer periphery of the hood through the curved inner side, so that the compressed air descending from the fan outlet in the compressed air supply cylinder transfers the soot sucked to the lower surface of the bottom plate from the gap in the outer periphery of the hood to the exhaust pipe in the center from the space between the compressed air supply cylinders.

Drawings

Fig. 1 is a sectional view showing a contamination prevention technique of a fan of a hood according to the present invention, as viewed from a front direction of the fan.

Fig. 2 is a sectional view showing a pollution preventing technique of a hood according to the present invention, as viewed from a front direction of a fan.

Fig. 3 is an enlarged view showing a lower central blowout part of the flow regulating plate of fig. 2.

Fig. 4 is an enlarged view showing a blowing portion toward the center of the outer periphery of the hood.

Fig. 5 is a side view of the range hood of fig. 2.

Fig. 6 is a sectional view showing the flow of compressed air discharged from the blower of fig. 5.

Fig. 7 is an upper perspective view showing the entire appearance of the current plate.

Fig. 8 is a top view of the fairing of fig. 7.

Fig. 9 is a sectional view showing the mounting position of the filter.

Detailed Description

Next, how to actually embody the pollution prevention technology of the hood according to the present invention will be described by embodiments. Fig. 1 is a front sectional view of a hood according to the present invention, showing a rotary blade of a fan F and an exhaust duct D. The fan F is dedicated to the exhaust pipe D, and the generated compressed air is supplied to the exhaust pipe D from the guide member a in the exhaust direction. Therefore, the outer periphery is surrounded by the case C, leaving the outlet W and closing the other portions. The bottom plate 2 is provided substantially in parallel with the top plate 1. In a downward gap G provided at the periphery of the bottom plate 2, there is the top plate 1. Therefore, the oil smoke and dirt generated in the kitchen are sucked by the air flow of the exhaust duct D generated by the fan F, rise, are sucked up from the gap G in the outer periphery of the bottom plate 2, are guided to the exhaust duct D, and are discharged to the outside. Therefore, the oil smoke and dirt generated in the kitchen are guided to the exhaust duct D exclusively from the gap G to be discharged to the outside, and thus do not pass through the fan F and do not contaminate the fan F.

Fig. 2 is a front sectional view of a hood according to the present invention, in which an outer circumference of a fan F is surrounded by a case C, and compressed air is discharged from an outlet W. A rectifying plate including a ceiling wall 1, a bottom plate 3 of the present invention, and a middle plate 5 is provided below the fan F, and a discharge port 4 for discharging smoke is provided at the center. The following description will be made along the flow of the compressed air. The compressed air discharged from the fan F is discharged from an outlet W, and is divided into two parts by a partition part with a transverse T-shaped cross section, namely a path A and a path B, wherein the path A blows the upper side of the partition part to an exhaust pipe D, and the path B blows the lower side of the partition part to a rectifying plate. Since the amount of the compressed air blown out from the fan F is large and the air speed is high, the vicinity of the exhaust pipe D becomes negative pressure, and the soot accumulated in the exhaust port 4 is strongly sucked out and sent to the soot outlet 4.

Although the path a to the exhaust gas wind pressure supply cylinder D1 and the path B to the rectification compressed air supply cylinder 11 are divided, first, the rectification compressed air passes through the connection part 10, passes through the compressed air supply cylinder 11, and enters the rectification chamber R when passing through the path B. The compressed air entering the rectification chamber R is discharged in all directions from a central blowout gap 6 located at the center of the lower surface of the rectification plate as shown in fig. 3, and is ejected to the center from an outer peripheral blowout gap 7 provided at the outer peripheral edge of the rectification plate as shown in fig. 4, and converges in the exhaust pipe D. The guide cover 12 of the central air outlet 6 is parallel to the flow rectification base plate 3. Further, the gap of the air outlet 6 is 1.0mm to 1.5 mm.

As shown in fig. 4, the outer periphery of the bottom plate 3 is bent upward, and the front end 8 thereof is bent horizontally inward, and a gap 7 is formed parallel to each other between the outer periphery of the flow rectification plate middle plate 5. The gap 7 is also 1.0mm to 1.5 mm. Although the air volume ejected from the

gaps

6 and 7 is small, the air velocity is high, and therefore, contaminants such as soot introduced into the surroundings are sucked and sent out to the exhaust pipe D. Rectification is performed so that such speed increase becomes smooth.

The negative pressure wind on the lower surface of the bottom plate 3 quickly sucks the oil smoke and conveys it to the hood outer peripheral opening 9, and the negative pressure wind generated in the horizontal gap 7 between the upper surface of the middle plate 5 and the horizontal end 8 quickly conveys dirt such as oil smoke to the exhaust pipe D at the center. Further, since an air film is present on the lower surface of the bottom plate 3 or the upper surface of the middle plate 5, dirt such as soot does not adhere thereto.

Fig. 5 is a side view of the hood of the present invention illustrating the side surface of the fan F. Fig. 6 is an enlarged view of the rectifying plate in the lower part of fig. 5. The path through which the compressed air discharged from the fan F flows is the same as that in fig. 2, and the compressed air discharged from the fan F is divided into a path a that feeds air to the exhaust duct D1 and a path B that enters the rectifying chamber R through the compressed air supply cylinder 11. As shown in fig. 6, the compressed air entering the rectification chamber R is ejected from the central gap 6 located at the center of the lower surface of the rectification chamber R to the lower surface of the bottom plate 3 at a high speed, and therefore, the dirt such as soot around is introduced by the negative pressure. The compressed air blown between the bottom plate 3 and the middle plate 5 is ejected from the outer circumferential gap 7 provided at the outer circumferential edge of the rectifying plate toward the center to form a negative pressure. In this way, the contaminated layer on the lower side of the bottom plate 3 is sucked in and sent out to the exhaust pipe D at the center.

Since the range hood area on the lower side of the fan F is small, the size of the formation rectification plate is also formed short.

Fig. 7 is an upper perspective view showing the entire appearance of the rectifying device, and fig. 8 is a plan view in which four compressed air supply cylinders 11 stand in the center. The compressed air descending from the fan outlet W in the compressed air supply cylinder 11 transfers the soot sucked to the lower surface of the bottom plate 3 from the space between the compressed air supply cylinders 11 to the exhaust pipe D at the center as shown by arrows from the gap 7 at the outer periphery of the hood.

Since dirt such as soot is collected in the vicinity of the compressed air supply cylinder 11, a filter f shown by a broken line is disposed so as to surround the compressed air supply cylinder 11 as shown in fig. 9. When the filter f is formed in a cylindrical shape, a groove-shaped oil receiving portion is provided at a lower portion of the outer surface, and the filter f is configured to be able to recover liquid oil. In addition, the proportion of the compressed air that is supposed to be discharged from the fan F is about 80% at the air outlet and about 20% at the rectifier.

Industrial applicability

As described above, since the fan attached to the range hood is configured to send all of the compressed air discharged from the fan attached to the range hood to the exhaust duct, and the oil smoke or dirt generated in one kitchen is sucked from the gap in the outer periphery of the range hood by the flow and sent to the exhaust duct, the oil smoke or dirt generated in the kitchen does not pass through the fan, and therefore, the fan attached to the range hood is not contaminated by the oil smoke or dirt generated in the kitchen.

Description of the reference numerals

F fan

1 kitchen ventilator top plate

2 rectifying plate

3 under the rectification soleplate

4 oil smoke outlet

5 upper surface of rectifying plate

6 lower surface blow-out port of rectifying plate

7 outer peripheral edge blow-out port of rectifying plate

9 peripheral opening of cooker hood

10 connecting part

11 compressed air supply cylinder

8 curved front end

G downward gap

D exhaust pipe

DS smoke exhaust pipe

F filter

Claims

1. A method for preventing contamination of a range hood, characterized in that more than half of compressed air generated by a fan is sent to an exhaust path from one path, the rest of the compressed air is sent to a rectification path from the other path in two parts, the rectification path is divided into two parts, one part is sent to a lower layer of a bottom plate of a rectification plate, the other part is sent to an auxiliary layer between a middle plate of the rectification plate and the bottom plate, and the compressed air discharged from the auxiliary layer is sprayed to the exhaust path from a gap at the periphery of the range hood through the upper surface of the middle plate.

2. A contamination prevention structure of a hood disposed at an outlet of a housing surrounding a fan, an exhaust pipe, and a partition between flow rectification plates, wherein the structure is such that compressed air discharged from the outlet by the fan is divided into two parts, half or more of the compressed air is supplied to the exhaust path, and the remaining part of the compressed air is supplied to the flow rectification path, and the structure has a central gap for supplying the compressed air supplied to the flow rectification path to a lower layer of a bottom plate of the flow rectification plate, and the structure is such that the compressed air supplied to an auxiliary layer between a middle plate of the flow rectification plate and the bottom plate is ejected from a gap disposed at an outer periphery of the hood to the exhaust path via an upper surface of the middle plate.

3. The contamination prevention structure of the range hood according to claim 2, wherein a filter is provided to surround one or more than one compressed air duct that sends compressed air generated by the fan and discharged from the outlet of the housing to the rectification path.

4. The contamination prevention structure of the range hood according to claim 2 or 3, wherein one or more than one compressed air duct is provided, the compressed air duct is blown from an upper side of a top wall provided on the middle plate to a lower side of the middle plate, and is configured to be blown toward the exhaust path via compressed air of an upper surface of the middle plate from a space where the compressed air duct is not present.

5. The contamination prevention structure of the hood according to claim 4, wherein the outer periphery of the top wall is configured to be bent downward, and the contaminants sucked toward the lower layer of the bottom plate pass through the bent inner side and are sucked by the negative pressure jetted from the gap of the outer periphery of the hood.