JPS58168832A - Suction port of range hood - Google Patents

Abstract

PURPOSE:To improve suction effect by a method wherein the suction port of a range hood for a plurality of heater sources has such shape and size as corresponding to those of the heater source and a main cooking unit and baffle plates are mounted at the central part of the range hood. CONSTITUTION:Suction ports 2 at the bottom surface of a range hood 1 have a size and shape corresponding to those of a pan 6 and a heater source 7 just below the range hood. The baffle plates 4 are fixed to the inside of the range hood by holders 3. An outer diameter of the baffle plate 4 is set in such a size as a rising air flow can be suctioned and the surrounding air is not suctioned. With this arrangement, the air flow rising from the heater source 7 and the pan 6 flows through a space between the suction ports 2 and the baffle plates 4. At this time, since the surplus air is not suctioned, so the suction speed is increased and the air may effectively be suctioned.

Description

[Detailed Description of the Invention] Conventionally, the inlet of a range hood has generally been in the form of an inverted funnel, but since the inlet of this shape is wider, the average suction speed is reduced. However, the inhalation velocity distribution was not uniform, and in some cases, even reverse flow occurred. For this reason, the rate of rise of the gas to be inhaled could not be kept up, and the gas was often diffused into the surroundings without being able to be inhaled sufficiently. In order to avoid this, even if the capacity of the exhaust fan is increased, the structure is extremely inefficient because it sucks in not only the gas to be sucked in, but also a large amount of surrounding air.

This invention aims to realize a range hood that can effectively inhale a target gas by improving the structure of the inlet.

This invention will be explained based on the drawings. First, in FIGS. 1 and 2, the front left part of the range hood 1 will be explained as an example. The suction hole 2 on the bottom of the range hood 1 corresponds to the pot 6 and heat source 7 directly below, and the inner diameter at the lowest end thereof is slightly larger than the outer diameter of the pot 6. Its planar shape is circular or square depending on the pot or grill used.

Inside this, a baffle plate 4 is supported by a holder 3 and a suction hole 1. The outer diameter of the baffle plate 4 is determined so that the suction port between it and the suction hole 2 can sufficiently suck in the air flow that rises along the outer surface of the pan after being heated, and can also prevent the suction of ambient air. , is determined to be the minimum. Further, an exhaust fan 5 having a capacity such that the suction speed at the suction port is slightly higher than the rising speed of the heated air is connected to the range hood 1.

In order to smooth and strengthen the suction flow, the longitudinal cross-sectional shape has a bulge in the center and rounded edges, as shown in Figure 1. 3 and 4 show an example of the embodiment described in claim (2). A part of the lower end of the range hood becomes the suction hole, and the adjacent parts of the two suction holes are common, which simplifies the structure and reduces the distance between the heat sources compared to the size of the cooking utensil. It has characteristics suitable for

The operation of the device having the above configuration will be explained. The air flow heated by the heat source 7 and the pot 6 rises along the side of the pot 6, increases its thickness while drawing in surrounding air, and becomes cylindrical, forming a space between the suction hole 2 and the baffle plate 4. reaches the inlet. Since the suction speed of the suction port is greater than the rising speed of the heated air, this rising air is immediately sucked.

The odor-laden air and steam rising from the inside of the pot 6 will move at a slower rate than the air rising outside if there is no lid.
The air reaches the center of the baffle plate 4, is guided along this to the inlet at the periphery, merges with rising air from the outside, and is inhaled. If the pot is covered, the air is ejected diagonally upward from the gap, but it joins the rising air outside the pot, expands it a little, and reaches the inlet. The case with a grill is almost the same as the case with a pot.

In this way, the smelly airflow from inside the pot is completely surrounded and blocked by the larger, faster rising air from the outside, like an air curtain, so it cannot leak to other places. There is no. This room is kept clean. In addition, it is efficient because it does not take in much unnecessary air.

[Brief explanation of drawings]

1 and 2 show one embodiment; FIG. 1 is a longitudinal sectional view of the front half, FIG. 2 is an upward perspective view, and FIGS. 3 and 4 show another embodiment. 1. Figure 3 is a longitudinal sectional view, and Figure 4 is an upward perspective view. Patent applicant 1) Miho Naka 3 (side Figure 41 Procedural amendment form (form) % formula % Z Title of invention Range hood inlet λ Relationship to the case of the person making the amendment Patent applicant address Name 5, amendment Date of order: June 29, 1981 6. Specification subject to amendment

Claims (2)

[Claims] (1) In a range hood that targets multiple heat sources,
This inlet of a range hood has an inlet hole corresponding to the shape and size of each heat source and cooking utensils mainly used, and a baffle plate inside the inlet hole to prevent intake from the center. (2) The inlet of a range hood according to claim (1), in which the closest portions of adjacent inlets are common.