JPH07260227A - Air supply and exhaust type range hood fan - Google Patents

Abstract

PURPOSE:To provide an air supply and exhaust type range hood fan which has a structure without impairing convenient operability of a cooking table and can largely improve an exhaust efficiency. CONSTITUTION:Exhaust smoke of peripheral fluid is effectively sucked without blowing away, collected and exhausted by an entrainment effect of the air to be blown away from an oblique air diffuser 10 at the rear of a burner implement 7 toward an obliquely upward direction. Overflowing of the exhaust smoke from the side to the exterior of a range hood fan main body A is prevented by a curtain of the air to be diffused from a height direction of a forward air diffuser of a forcible air supply passage 8 part at the outside of a vertical sidewall part 1 to a front side. The exhaust smoke rising along a surface of a front wall 4 of the body A without being collected is collected together with the exhaust smoke rising from the implement 7 and a material to be cooked, and exhausted by pressing it down by a downward air flow diffused down from a downward air diffuser 11 along a surface of a screen plate 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can efficiently exhaust exhaust fumes such as oil supply / exhaust type range hood fans, more specifically, oil smoke, combustion gas, etc., and can also contribute to saving power consumption of air conditioning equipment. The present invention relates to a supply and exhaust type range hood fan.

[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. 6; hereinafter referred to as No. A) and Japanese Utility Model Laid-Open No. 3-57337.
The technique disclosed in Japanese Patent Publication No. Gazette (shown in FIG. 7; hereinafter referred to as No. B) is already known. No. A (FIG. 6) 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 instrument 7, and an L-shaped angle member 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 member The air blown out from the air blowing holes (not shown) formed in the left and right side plate portions a2, a2 portions and the back plate portion a1 facing the vertical surface a3 'of a3 is redirected upward at a right angle on the vertical surface a3'. The back plate part a1, the left and right side plate parts a2,
The structure is made to rise along the inner surface of a2, and the suction action of the air flow rising along the three surfaces (back plate part a1, left and right side plate parts a2, a2) causes the smoke to be drawn toward the wall surface side without diffusion. In B (Fig. 7), burner 7
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.
It is enclosed except for the frontage 300 for work during cooking, and the back plate a
1, the left and right side plate portions a2, a2 and the sleeve plate portions a5, a5 are made hollow inside to secure a guide space for outside air to be 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 300 during cooking by bending the sleeve plate portions a5, a5, the limited effective space on the combustion appliance 7 is reduced, In addition, cooking work involving handling the burner 7 is inconvenient and dangerous. In addition, even if the air supply / exhaust type range hood fan has the purpose of improving the exhaust efficiency, the cooling air and the warm air of the heating and cooling are agitated by the air supply, and the entire kitchen is ventilated so that the air conditioning effect is impaired. There was also an inherent problem with being.

The present invention has been made in view of the conventional circumstances, and an object thereof is to provide a supply / exhaust type range hood fan which has a structure which does not impair the convenience of use of the cooking table and which greatly improves the exhaust efficiency. To do. Another technical problem is to provide a supply / exhaust type range hood fan in which a means for reducing the overall ventilation of the kitchen is provided to save the power consumption of the cooling and heating device.

[0005]

[Means for Solving the Problems] The technical means taken to achieve the above-mentioned object is to hang down from the range hood fan main body so as to approach the height level of the combustion appliance in the rear side area of the combustion appliance. The side wall part, the outside air supply device provided in the range hood fan main body, and the back part of the range hood fan main body which is connected to the outside air supply device and has a dimension wider than that between the side wall parts and hangs down on the rear end of the range hood fan main body. A compulsory air supply path that constitutes the air supply part, and an oblique air blowout part that is provided in the forced air supply path part between the side wall parts and blows out guiding air obliquely upward toward the hood body, and a forced air supply part outside the side wall part. A forward air blower that is installed in the height direction and blows out air to the front side, and a downward air blower that is connected to the outside air supply device and blows out guiding air downward from the curtain plate of the range hood fan body along the front wall surface. Is that and a phloem.
According to a second aspect of the present invention, the downward air blowing portion is provided on the lower side of the surface of the curtain plate portion of the first aspect, and is connected to an outside air supply device on the upper side of the curtain plate portion, and is directed obliquely downward toward the rear of the cook. That is, the air curtain blow-out part for blowing out air is provided. Further, claim 3 is to supply air from one outside air supply device to the oblique air blowing portion, the downward air blowing portion, the forward air blowing portion, and the air curtain blowing portion.

[0006]

According to the above technical means, the following actions are achieved. (Claim 1) An entrainment effect of guiding air that merges with a gently inclined shape (a sharp angle shape) with respect to exhaust smoke that is blown upward and obliquely upward from an oblique air blowing portion behind a combustion appliance (N. Rajaratnam Original "Jet" Translated by Yasumasa Nomura, Morikita Publishing Co. Chapter 1 Two-dimensional free jet No. 1
From page 0, line 6 to page 11, line 1, "Entrainment ... Qo (jet flow)"
Assuming that the flow rate from the nozzle is Q / Qo is 1
Get bigger. 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. In addition, the overflow of smoke exhaust from the side of the range hood fan body to the outside,
This is prevented by a curtain of air blown from the height direction to the front side from the forward air blowing portion of the forced air supply passage portion outside the side wall portion. Then, the smoke exhaust that rises without being collected along the surface (outer surface) of the front wall portion of the range hood fan main body,
It is pushed down by the downward airflow blown downward from the downward air blowing part along the surface of the curtain plate part, and it collects together with the smoke emitted from the burning appliances and cooked foods by utilizing the entrainment effect generated in the hood body. Care and exhaust. Therefore,
Exhaust smoke generated from burning appliances and cooked food is concentrated in the range hood fan body and exhausted without being released to the outside. In addition, the internal hollow forced air supply passage also serves as the back wall of the range hood fan body. (Claim 2) An air curtain blown obliquely downward from the curtain plate section toward the rear of the cooker divides the air supply area to the range hood fan main body and the cooling / heating area in the heating / cooling device to suppress overall ventilation. . Further, an air curtain flow directed toward the rear of the cooker is blown from the upper portion of the surface of the curtain plate portion, and a downward air flow is blown from the lower portion of the surface. (Claim 3) Oblique air blowing to the hood body that exhibits an entrainment effect, downward air blowing along the surface (outer surface) of the front wall portion, forward air blowing from the outside of the side wall portion, and One air supply source also serves as the air curtain blowout to the rear.

Since the present invention is configured as described above, it has the following advantages. (Claim 1) From the rear of the combustion appliance, the guiding air that joins the rising smoke with a gentle slope (sharp angle) is blown out to effectively attract the rising smoke including odor, waste gas, and the like. Exhaust of smoke from the side of the range hood fan body to the outside is caused by the air curtain that blows out to the front side along the height direction of the side wall that is hung from the forced air supply passage outside the side wall. Smoke that rises without being collected along the surface (outer surface) of the front wall of the range hood fan body was blown downward along the surface of the curtain plate from the downward air blowing part. Using the entrainment effect generated by pushing down with a downward airflow inside the hood, the exhaust gas is exhausted together with the rising smoke from the combustion equipment and cooked food. Therefore, it is possible to provide a range hood fan that exhibits excellent exhaust efficiency by exhausting smoke exhausted from a burning appliance and cooked food to the outside without letting it escape to the outside. In addition, the manufacturing cost is low because the structure is very simple without the need to mount the burning appliance or modifying the built-in cabinet, and the manufacturing cost is low. This makes it easy to cook and handle pots and pans, and it is extremely convenient to use. In addition, the forced air supply passage that supplies air to the diagonal air blowout portion and the forward air blowout portion outside the side wall portion constitutes the back wall portion of the range hood fan body. The structure is simple compared to the case. Therefore, the work space for cooking is reduced as in the prior art in which the interior hollow back wall or side wall extending to the combustion equipment (gas stand, stove stand, etc.) surrounds the area other than the work front during cooking. Without this, it is possible to provide a range hood fan in which the smoke exhaust efficiency is significantly improved and cooking work is easy and safe. (Claim 2) In addition to the advantage of claim 1, an air curtain blown obliquely downward from the curtain plate rearward of the cooker provides an air supply area to the range hood fan main body and a cooling / heating area in the cooling / heating device. It works by partitioning and reducing the overall ventilation, and it is possible to save the power consumption of the heating and cooling device in the kitchen. Further, since the air curtain flow blowing portion facing the back of the cook is provided above the downward air flow blowing portion along the surface (outer surface) of the front wall portion, the downward air flow and the air curtain flow are mutually It is possible to ensure desired exhaust efficiency and power consumption saving in the heating and cooling device without mixing to weaken the influence. (Claim 3) In addition to the advantages of Claim 2, the outside air supply device 1
Since each unit also serves as an air supply source, the equipment cost can be further reduced without increasing the size.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 3 show embodiments of claims 1 and 3 (hereinafter referred to as a first embodiment), and FIGS. 4 and 5 show embodiments of claims 2 and 3 (hereinafter referred to as a second embodiment). Each is shown. First, the first embodiment will be described. Reference numeral A is a range hood fan main body.

The main body A of the range hood fan is a hood body which is formed of a metal flat plate and has a rectangular box shape 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. a
The exhaust device 5 including the casing 15, the motor 25, and the exhaust fan 35 is arranged in a housing shape, and the filter 6 is mounted in an inclined shape in front of the exhaust device 5 via the mounting frame 15, and the exhaust device 5 The casing 15 is connected to an exhaust duct 45 that penetrates the room wall 100 and projects to the outside so as to inhale the exhaust fumes such as hot smoke, combustion gas, and odor rising from the combustion appliance 7 and the cooked food. It has a basic structure of filtering with a filter 6 and discharging it to the outside, and includes a forced air supply passage 8, an outside air supply device 9, an oblique air blowing portion 10, and a downward air blowing portion.
11 and a forward air blowing section 12 are provided respectively.

The side walls 1 and 1 are made of a plate material and are vertically provided so as to approach the height level of the combustion appliance 7 in the rear side area of the combustion appliance 7. In detail, as shown in FIG. 1, the burner 7 is vertically installed at a rear side portion to a height level region slightly higher than the burner 7. 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 7 on the rear side. Specifically, as shown in FIG. 1, the vertically extending side wall portion 1 portion (hereinafter referred to as vertically extending side wall portion 1 ′) is
It has an inverted trapezoidal shape with a short edge at the bottom edge, and can be used as a large working space 200 when handling cooking utensils in front of the beveled edge that is the front edge.

The forced air supply passage 8 has an inner / outer double wall structure in which the back wall portion 2 has a space secured therein, and the back wall portion 2 has a distance more than the opposing vertical side wall portions 1 ', 1'. It is made wide, and both sides are vertically extended integrally from the opposing vertical side walls 1 ', 1'to the lower end so as to project from the vertical side walls 1', 1'to the left and right. Is horizontally extended to the inside of the room, and an oblique air blowing portion 10 is formed on the upper surface of the extended hollow portion 8a.

As shown in FIGS. 1 and 3, the oblique air blowing portion 10 is an elongated air blowing hole which is opened over the entire length of the upper surface of the hollow portion 8a. Includes a front wall portion 4 and a filter 6 in the hood body a.
It is inclined so as to face the direction opposite to the part between.

The outside air supply device 9 accommodates an air supply fan 29 inside a casing 19 mounted on the upper surface of the ceiling wall 3, and penetrates a room wall 100 through an air supply duct 39 which is communicated with the casing 19. The air supply duct 49 communicates with the casing 19 and extends in the front-rear direction. The rear end of the air supply duct 49 is connected to the upper end of the forced air supply passage 8 to supply the air. The front end of the duct 49 is connected to the curtain plate 13.

The forward air blowing portion 12 is a hole formed in the height direction in the front surface of a portion of the forced air supply passage 8 which projects left and right from the vertically extending side wall portions 1 ', 1'. As shown in FIGS. 2 and 3, the long holes are linearly arranged in close proximity to each other, or the small holes are opened at equal intervals.

As shown in FIG. 1, the downward air blowing portion 11 is formed as a long hole in the surface of a hollow curtain plate portion 13 which is integrally formed on the top portion of the front wall portion 4 so as to stand up. More specifically, a cover 11b that changes the direction of the downward air flow is integrally extended from the front surface of the curtain plate 13 in front of the elongated hole 11a formed in the surface of the hollow curtain plate 13. The curtain plate portion 13 may be molded separately from the front wall portion 4 and attached to the top of the front wall portion 4.

Next, the operation of the air supply / exhaust type range hood fan in the first embodiment will be briefly described. The outside air supplied from the outside air supply device 9 driven by the operation of the range hood fan is supplied to the outside. It is supplied into the forced air supply passage 8 and the curtain plate portion 13 via the duct 49, and is blown out together from the oblique air blowing portion 10, the downward air blowing portion 11, and the forward air blowing portion 12. At that time, due to the entrainment effect of the guiding air w which joins with a gently inclined shape (a sharp angle shape) with respect to the smoke emitted from the oblique air blowing portion 10 behind the combustion appliance 7 and obliquely upward and rising, the surroundings. It effectively attracts the rising flue gas without blowing it off and collects it, and then exhausts it. Further, the overflow of smoke exhaust from the side of the range hood fan main body A to the outside is blown out to the front from the frontward air blow-out portion 12 of the forced air supply passage 8 outside the vertical side walls 1 ', 1'. Prevent by x. Then, the smoke that rises without being collected along the surface of the front wall portion 4 of the range hood fan main body A is blown downward from the downward air blowing portion 11 along the surface of the curtain plate portion 13 to the downward air. Push down with flow y, hood body a
Combustion appliances 7 utilizing the entrainment effect that occurs inside
It collects and exhausts the smoke together with the smoke rising from the food.

Further, the wind speed of the oblique air blowing portion 10 is 2 m to 4 m / s, and the wind speed of the downward air blowing portion 11 is 0.5 m / s.
s, the wind speed of the forward air blowing unit 12 was set to 0.5 m / s, and according to the experimental results, the CO ₂ collection efficiency by the range hood fan having only the exhaust device was 9 m ³ / h of exhaust air volume.
While it was 0%, in the present invention, the exhaust air volume is 200 m
It was possible to increase the CO ₂ collection efficiency of 100% at ³ / h. As a result, the rotation speed of the exhaust device 5 can be reduced, and the effect of preventing noise can also be achieved.

Next, the range hood fan of the second embodiment will be described. In the second embodiment, an air curtain blower 14 for blowing air downward from the curtain plate 13 toward the rear of the cook is provided. Since the structure is the same as that of the first embodiment except for the above, detailed description will be omitted by giving the same reference numerals.

The air curtain blowing portion 14 divides the inside of the curtain plate portion 13 into upper and lower parts, communicates with the air supply duct 49 to the upper chamber 14a, and faces downward to the surface of the curtain plate portion 13 facing the upper chamber 14a. It has a long hole with an inclination.

In the second embodiment, the lower chamber 14b also communicates with the air supply duct 49, and the above-mentioned downward air blowing portion 11 is provided on the surface of the curtain plate portion 13 which the lower chamber 14b faces.

According to this embodiment, the air curtain z blown out toward the rear of the cooker shown in FIG. 5 and the downward air flow along the front wall portion 4 do not join, and in addition to the first embodiment, the air curtain z is in the range. There is an advantage in that the air supply area X to the hood fan main body A and the cooling / heating area Y in the cooling / heating device B are divided to reduce the overall ventilation.

By the way, the wind speed of the air curtain z is 1 m /
It was also proved that the power consumption of the heating / cooling device B in the kitchen could be saved by about 40% as compared with the range hood fan that does not supply air, as a result of the experiment in S.

Although not described in detail, the air volume of each of the oblique air blowing portion 10, the downward air blowing portion 11, the forward air blowing portion 12, and the air curtain blowing portion 14 can be changed by changing the design depending on the area of each blowing hole. Just do it. At this time, it is also possible to adjust the opening degree of each of the blowing holes by a movable plate (not shown) whose rotation angle can be adjusted so as to correspond to various situations.

[Brief description of drawings]

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

FIG. 2 is a perspective view.

FIG. 3 is a sectional view taken along line (3)-(3) of FIG.

FIG. 4 is a side view of an essential part of the second embodiment, with a part cut away.

FIG. 5 is a side view of the kitchen showing a use state.

FIG. 6 is a perspective view of a conventional example.

FIG. 7 is a perspective view of still another conventional example.

[Explanation of symbols]

A: Range hood fan main body 7: Combustion appliance 1: Side wall 9: Outside air supply device 8: Forced air supply passage 10: Diagonal air outlet 12: Forward air outlet 11: Downward air outlet 14: Air curtain outlet 13: Curtain board part a: Hood body

Claims (3)

[Claims] 1. A side wall portion vertically extending from the range hood fan main body so as to approach the height level of the combustion appliance in a side area on the rear side of the combustion appliance, an outside air supply device provided in the range hood fan main body, A forced air supply passage that is connected to the outside air supply device and is vertically extended to the rear end of the side wall portion with a dimension wider than that between the side wall portions to form the back portion of the range hood fan main body, and a forced air supply passage portion between the side wall portions. An oblique air blowing portion that blows guiding air obliquely upward toward the inside of the hood body, a forward air blowing portion that blows air to the front side provided in the height direction of the forced air supply passage portion outside the side wall portion, and the outside air An air supply / exhaust type range hood fan, which is connected to an air supply device and has a downward air blowing portion that blows out guiding air downward along the surface of the front wall portion from the curtain plate portion of the range hood fan main body. N. 2. The downward air blowing portion is provided below the surface of the curtain plate portion, and air is blown obliquely downward toward the rear of the cooker by being connected to an outside air supply device on the upper surface of the curtain plate portion surface. The air supply / exhaust type range hood fan according to claim 1, further comprising an air curtain blowing portion. 3. The air supply device according to claim 1, wherein air is supplied from one outside air supply device to the oblique air blowing unit, the downward air blowing unit, the forward air blowing unit, and the air curtain blowing unit. Exhaust range hood fan.