JP3485201B2 - Range hood fan - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a range hood fan,
More specifically, the present invention relates to a range hood fan that efficiently exhausts fumes such as oil smoke and combustion gas.

[0002]

2. Description of the Related Art Conventionally, there are various types of prior art range hood fans that have been proposed for efficiently exhausting smoke, but air is ejected from below a combustion appliance (gas stand or stove stand). The two main types are the type (the former) and the type that ejects air from the range hood fan body (the latter). The former requires remodeling of a cabinet or the like in which a combustion appliance is installed separately from the main body of the range hood fan into a special structure, so that the equipment cost rises and the construction work becomes very large. On the other hand,
The latter does not require a cabinet or the like for installing a combustion appliance to be modified into a special structure, so that the construction work can be simplified, the construction period can be shortened, and the total cost can be reduced. Conventionally, as the latter prior art, Japanese Utility Model Laid-Open No. 3-57336 (shown in FIG. 4, referred to as A in the following) and Japanese Utility Model Laid-Open No. 3-57337.
The technique disclosed in the publication (shown in FIG. 5; hereinafter referred to as "B") is already known. No. A (FIG. 4) is a back plate part a1, left and right side plate parts a2, a of the range hood fan main body A.
2 are formed in a hollow shape that communicates with each other and extend to the combustion appliance 300, and L-shaped angle-shaped material a3 is projectingly provided on the inner surface of the back plate part a1, the left and right side plate parts a2, a2, and the L-shaped angle-shaped material is formed. Left and right side plate portions a2, a2 facing the vertical surface a3 ′ of a3
The air blown out from the air blow-out holes (not shown) formed in the portion and the back plate portion a1 are converted upward at a right angle by the vertical surface a3 ′, and the back plate portion a1 and the left and right side plate portions a2 are changed.
The structure is such that it rises along the inner surface, and three surfaces (back plate part a
1, the suction action of the airflow rising along the left and right side plate portions a2, a2) causes the smoke to be drawn toward the wall surface side without being diffused.
The left and right side plate parts a4, a4 which are extended to be hollow inside
The sleeve plate portions a5, a5 are bent at a right angle so as to communicate with the tip of the sleeve plate portions a5, a5, and an air blowing hole a6 is formed on the inner surface of the sleeve plate portions a5, a5. Due to the negative pressure caused by the flowing air flow, the generated odor and the like are brought to the roots of the sleeve plate portions a5 and a5.

[0003]

The problems A and B are as follows.
Enclosed except for the frontage for working during cooking, and further back plate a1,
The left and right side plate portions a2, a2 and the sleeve plate portions a5, a5 are hollow inside to secure a guide space for the outside air guided to the air blowing hole a6. Therefore, by reducing the thickness of the left and right side plate portions a2, a2 and further reducing the working frontage during cooking by bending the sleeve plate portions a5, a5, the limited effective space on the combustion appliance 300 is reduced, and It makes cooking work using the burner 300 inconvenient and dangerous. In addition, since the flow distance of the outside air is long and the pressure loss is large, and the outside air is ejected from multiple surfaces at once, it is necessary to use a large-capacity air supply fan, which causes noise problems. Provoke.

The present invention has been made in view of the conventional circumstances, and its technical problem is a simple structure which does not impair the convenience of use of the cooking table and does not cause a noise problem. The aim is to collect and exhaust the smoke emitted from the side of the hood fan body.

[0005]

[Means for Solving the Problems] The technical means taken to achieve the above-mentioned object is to make a side part of a range hood fan main body close to a height level of a combustion appliance in a rear side area of the combustion appliance. Is formed by a side wall portion that vertically extends between the two side wall portions, and is provided between the both side wall portions so as to extend vertically toward the inside of the range hood fan main body, which is provided so as to communicate with the forced outside air forced air supply passage. An air blow-out portion for ejecting the guiding air is provided, and a non-perforated space for flue gas intake is secured at a predetermined interval between the both side wall portions and the end portion of the air blow-out portion.
Moreover, the non-hole space length for smoke exhaust intake according to claim 1 is 50 m.
It is effective that it is m to 150 mm.

[0006]

According to the above technical means, the following actions are achieved. (Claim 1) An entrainment effect of guiding air that merges with a gentle slope (a sharp angle) with respect to exhaust smoke that is blown upward from the rear of a combustion instrument and rises (N. Rajaratnam original "jet") Translated by Yasumasa Nomura, Morikita Publishing Co., Ltd. Chapter 1, 2D free jet, page 10, line 6 to page 11, line 1
Aimment) ... Qo (jet flow) is the flow rate from the nozzle, Q / Qo becomes larger than 1 from the experiment. This means dragging a considerable amount of surrounding fluid as the jet advances. " ) Effectively draws in and exhausts the surrounding fluid smoke without blowing it off. At that time, the entrainment effect of the guiding air blown obliquely upward from the rear side of the combustion appliance in the non-hole space for smoke exhaust suction secured between the both side wall portions and the end portion of the air blowing portion. Occurs and the smoke exhausted from the side of the combustion appliance to the outside of the range hood fan main body is circulated behind the guiding air immediately after being ejected from the air blowout part using the non-perforated space for smoke intake. As described above, the air is effectively drawn, and the air is blown onto the guiding air from the air blowing portion and guided together obliquely upward toward the inside of the range hood fan main body. (Claim 2) The value of the non-hole space for flue gas intake is an entrainment effect of the flue gas that rises from the combustion appliance and the flue gas that tries to diffuse from the side of the combustion appliance to the outside of the range hood fan body. 50 mm to 150 mm was optimal for pulling by. If it is less than 50 mm, the expected entrainment effect cannot be obtained because the space becomes narrower, and if it is more than 150 mm, the ejection range of the guiding air becomes narrower, and as a result, the entrainment effect of the smoke exhaust rising from the combustion equipment is caused. Exhaust efficiency itself decreased, and it was insufficient to obtain the desired exhaust efficiency, and favorable results could not be expected.

[0007]

As described above, according to the present invention, the rising odor, waste gas, etc. can be obtained only by the blowing pressure of the guiding air that joins the rising smoke from the rear of the combustion appliance with a gentle slope (sharp angle). Not only the smoke exhaust including but also the smoke exhausted from the side of the combustion appliance to the outside of the range hood fan body due to the entrainment effect is effectively attracted and exhausted, improving the efficiency of smoke collection. Can be achieved. Further, in the rear side area of the combustion appliance, a flat plate-like side wall which is vertically installed so as to approach the height level of the combustion appliance, a forced air supply passage for the outside air, and an air blowing portion at the lower end thereof are provided in the range hood fan main body. Since it can be dealt with just by forming it in the structure, it is structurally very simple without the need to mount a combustion appliance or modify the built-in cabinet, the manufacturing cost is low, and the forced air supply path is shortened. It also has a small loss and is effective in preventing noise. Moreover, since the side wall portion is vertically installed so as to approach the height level of the combustion appliance in the lateral region on the rear side of the combustion appliance, a wide area in front of and right side of the combustion appliance should be secured as a working space. Can
It is easy to use for cooking and handling pots and pans. Therefore, the working space for cooking is reduced as in the prior art in which the interior hollow back wall and side wall extending to the combustion equipment (gas stand, stove stand, etc.) surround the area other than the frontage for working during cooking, etc. It is possible to provide a range hood fan in which smoke emission efficiency is significantly improved and cooking work is easy and safe without causing a noise problem.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show the first embodiment, and FIG. 3 shows the second embodiment. First, the first embodiment will be described. Reference numeral A is a range hood fan main body, B is a forced air supply passage, b is an air blowing portion, and C is a non-perforated space for flue gas intake.

The range hood fan main body A is a hood formed of a metal flat plate in the shape of a rectangular box whose lower surface is opened by left and right side walls 1, 1, a back wall 2, a top wall 3, and a front wall 4. The exhaust device 5 composed of the casing 15, the motor 25, and the exhaust fan 35 is arranged in the body a in a housing shape, and the filter 6 is obliquely attached to the front of the exhaust device 5 via the attachment frame 7, and the exhaust gas is exhausted. The casing 15 of the device 5 is connected to the exhaust duct 8 which penetrates the chamber wall 100 and projects to the outside in a communication manner.
It has a basic structure for inhaling flue gas consisting of hot smoke, combustion gas, and odor generated from cooked foods and odors generated from cooked appliances 9 and cooked foods, filtering it with a filter 6 and discharging it to the outside. An air supply passage B, an air blowing portion b, and a non-hole space C for inhaling smoke exhaust are provided.

The side wall portion 1 is made of a plate material and is vertically installed so as to approach the height level of the combustion instrument 9 in the rear side area of the combustion instrument 9. In detail, as shown in FIG. 1, the burner 9 is vertically installed at a rear side portion thereof to a height level region slightly higher than the burner 9. It should be noted that there is no functional difference even if it is hung vertically to the same level level range as the combustion appliance 9 on the rear side. The side wall portion 1 that is vertically provided is specifically shown in FIG.
As shown in Fig. 3, it has an inverted trapezoidal shape with the lower edge as a short edge, and a wide working space for handling cooking utensils in front of the beveled edge which is the front edge.
It can be used as 200.

The forced air supply passage B has an inner and outer double wall structure in which the back wall portion 1 secures a space inside, and the back wall portion 2 is vertically extended to the lower end of the side wall portion 1 and has an upper end opening portion. , Intake fan
A casing 12 in which 10 is provided and which is connected to an intake duct 11 which projects to the outside is connected in a communication manner, the lower end is horizontally extended to the indoor side, and an air blowing portion b is horizontally formed on the upper surface thereof. is doing.

The air blowing portion b is an elongated air blowing hole as shown in FIGS. 1 and 2, and is the hood body a.
It is inclined so as to face the inner direction, specifically, the direction facing the portion between the front wall portion 4 and the filter 6 in the hood body a.

The non-perforated space C for flue gas intake is formed by leaving a non-perforated portion between the end portion of the air blowing portion b and the inner surface of the side wall portion 1 opposed to each other, and the interval thereof is 50.
The range is from mm to 150 mm.

Next, the operation of the range hood fan of the first embodiment will be described. The flue gas x containing rising oil smoke, combustion gas, odor, etc. from the combustion instrument 9 and cooked food is the hood body a.
It rises in the direction and is collected and exhausted by the suction action of the exhaust device 5. At that time, the airflow of the guiding air from the air blowing portion b does not blow off to the upward flow of the flue gas x rising from the combustion appliance 9 or the cooking product, and joins in a gentle slope (a sharp angle) to provide an entrainment effect. It can be dragged and guided to the hood body a to be caught. Then, even to the exhaust gas y containing oil smoke, combustion gas, odor, etc. from the burning appliance 9 or the cooking product that is about to overflow from the side of the range hood fan main body A, it is blown obliquely upward from the rear of the burning appliance 9. An entrainment effect is generated by the guided air that is generated, and the smoke exhaust y is circulated behind the guide air immediately after being ejected from the air blowing portion b through the smoke exhaust non-hole space C. The guide air from the air outlet b, and guides it obliquely upward toward the inside of the range hood fan main body A.

Therefore, according to the first embodiment, not only the exhaust gas x containing rising burning smoke, burning gas, odor, etc. from the burner 9 and the cooked food, but also from the side of the range hood fan main body A to the outside The flue gas y that is about to overflow can be effectively attracted by the entrainment effect of the guiding air that is jetted obliquely upward and can be exhausted. Moreover, since the vertically extending portion (extending portion) of the side wall portion 1 has a reverse trapezoidal shape in the side rear area of the combustion instrument 9 and opens the front of the slanted edge, the front space becomes wide, You can easily handle cooking utensils such as frying pans and pots, as well as cooking work.

Next, the range hood of the second embodiment will be explained. In this embodiment, the small holes in which the long hole-shaped air blowing portions b of the first embodiment described above are linearly arranged at regular intervals. It is formed by a group, and there is no difference in operation and effect from the first embodiment described above, and the same reference numerals are given and description thereof is omitted.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment with a part cut away.

FIG. 2 is a sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a sectional view taken along line (2)-(2) of the second embodiment.

FIG. 4 is a perspective view of a conventional example.

FIG. 5 is a perspective view of still another conventional example.

[Explanation of symbols]

A: Range hood fan main body 9: Combustion appliance 1: Side wall B: Forced air supply path b: Air blowout part C: Non-perforated space for flue gas intake

Claims (2)

(57) [Claims] 1. A side portion of a range hood fan main body is formed by a side wall portion which is vertically provided in a lateral region of a rear side of a combustion appliance so as to approach a height level of the combustion appliance, and a side wall is provided between the side wall portions. A forced air supply passage for the outside air to be installed, and an air blowing portion that is provided in communication with the forced air supply passage and ejects guiding air obliquely upward toward the inside of the range hood fan main body are provided, and both side wall portions are provided. A range hood fan, characterized in that a non-perforated space for flue gas intake and a predetermined space is secured between each end of the air blowing part. 2. The length of the non-hole space for intake of smoke exhaust is 50 mm.
The range hood fan according to claim 1, wherein the range hood fan has a size of from 150 mm to 150 mm.