JPS6317951Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a kitchen exhaust system, and in particular, effectively separates liquid particles such as oil and moisture contained in steam, smoke, steam, etc. generated in the kitchen, and separates gas and liquid. This invention relates to a kitchen exhaust system that exhausts air.

Conventionally, a variety of kitchen exhaust fans have been provided that have a motor-driven Shirotsuko fan inside a housing with an intake port on the bottom and an exhaust port on the top, and exhaust steam, smoke, steam, etc. generated in the kitchen to the outside. However, the biggest problem is greasy food,
Particularly in the steam containing a large amount of oil, which is generated in Chinese cuisine, the oil is separated by the centrifugal force of the exhaust fan, and may adhere to or solidify around the exhaust fan, the inner wall of the case, the intake port, etc. There are drawbacks such as oil droplets blowing out from the periphery of the intake port and falling onto cooking utensils and staining them. Especially if a large amount of oil accumulates and hardens, it may cause the clay to become dirty. It had some drawbacks, such as becoming like a high gelatin and clogging the gap between the fan blade and the intake port, or sticking and interfering with the rotation of the fan.

In order to eliminate the above drawbacks, a filter is installed at the inlet of the exhaust fan, an oil drain hole is installed at the lowest point at the rear end of the case, or an annular oil drain pan is installed around the inlet to exhaust oil. Various methods have been proposed, such as absorbing the oil with a filter before inhaling it into the fan, or artificially discharging the separated oil in the case by concentrating it in an oil drain hole or an annular oil drain pan. However, according to the inventor's long-term observations and experiments, although these means seem to have solved some of the above-mentioned drawbacks, in reality they did not yield very good results. In other words, when a filter is installed at the bottom of the suction port, a large amount of oil is certainly absorbed by the filter, but this filter reduces the effective suction area of the suction port and also becomes an obstruction to the airflow sucked into the suction port. , the suction effect of the exhaust fan is reduced, and if
To obtain the same suction efficiency as when no filter is installed, a motor with higher horsepower is required, which consumes more electricity, and if a large amount of oil accumulates, the ventilation effect of the filter decreases, causing a large amount of oil to accumulate. Since the exhaust gas escapes to the outside of the exhaust fan, the filter must be removed from the exhaust fan and washed periodically, which is cumbersome and inconvenient to use.Also, the oil that adheres to the filter becomes gelatin-like viscous after a long period of time. In addition to being difficult to wash off, hot steam is generated from cooking utensils and stoves when cooking.
Its viscosity decreases when it is heated by smoke, and gravity causes it to drip into pots and dishes, making them dirty. This invention was devised to eliminate the above-mentioned drawbacks, and effectively separates and concentrates the oil and moisture contained in oil and smoke, and discharges it to the outside, blowing it out from the periphery of the exhaust fan's intake port. The purpose of the present invention is to provide a kitchen exhaust system that can prevent the above.

Next, the drawings will be explained.

As shown in Figures 1 to 3, 1 is the box-shaped main body of a kitchen exhaust fan, and it is approximately 3 in diameter from the front to the rear.
It has an inclination angle of ~15, and is configured so that oil accumulated inside the main body can be discharged concentratedly at the rear end. Reference numeral 2 denotes a smoothly wound fan case, which is provided inside the main body 1. Inside the case 2, a Sirotskov fan 4 driven by a motor 3 attached to the main body 1 is rotatably housed. The central suction port of the fan 4 faces the suction port 21 of the case 2, and the exhaust port 22 of the case 2 is formed above the spiral-shaped extension end 23 and protrudes from the top surface of the main body 1.

Note that an oil pan 5 is attached to the bottom surface 24 of the fan case 2 so as to face the exhaust port 22, and this pan 5 is a shallow pan formed in an approximately L-shape, and is provided so as to protrude downward at its rear end. A receiver bottle 6 is detachably attached to the lower end of the drain pipe 51.

The bottom surface of the extension end 23 below the exhaust port 22 of the fan case 2 is formed into an inclined surface 25 that slopes upward, and the front and rear ends of the base of the tangential extension 23 on the bottom surface 24 of the fan case 2 and an oil drain hole 26 at the lower rear end of the inclined surface 25, respectively.
27 and 28 are provided. To explain in more detail, the cutting line extension 2 of the bottom surface 24 of the fan case 2
A first oil drain hole 2 is located at the cutting point position from the cylindrical portion 20 of 3.
6 also intersects the inclined surface 25 along the side wall 29 of the cutting line extension 23, a second oil drain hole 27 is provided.
However, slit-shaped oil drain holes 28 are further provided in the front part of this oil drain hole 27 and at the starting end of the cutting line where the cylindrical part 20 and the cutting line extension part 23 intersect. , 27, and 28 communicate with a saucer 5 attached to the lower surface of the case 2.

As shown in FIG. 3, the saucer 5 is formed into an L-shaped shallow dish and is attached to the bottom surface 24 between the rear part of the fan case 2 and the lower part of the inclined surface 25 with screws 52. . This saucer 5 is provided with a drain hole 53 that communicates with the oil drain hole 26 of the fan case 2, and a drain pipe 51 is integrally formed with the saucer 5 at the lower end of this drain hole 53. Note that the saucer 5 has a protrusion 5 that forms a groove 54 that guides oil and the like accumulated in the saucer to the drain hole 53.
5 is provided. Of course, the above protrusion 5 is attached to the saucer 5.
The main body 1 allows the oil to be tilted backward and downward even if 5 is not provided.
It can flow into the drain hole 53 along the bottom surface of the saucer 1 attached to the drain hole 53.

4 and 5 show modified examples of the oil drain hole provided in the fan case 2. In the case of FIG. 4, the inclined surface 25
While the oil drain hole 28 on the lower surface is formed as one circular hole in the above embodiment, in this embodiment, the oil drain hole 28 is formed in the inclined surface 25.
A plurality of elongated holes 28 are formed in a line along the lower surface of the holder. In addition, in the case of FIG. 5, the circular hole 28
A plurality of long holes 28a are formed diagonally outside. Further, the oil drain hole 27 is arranged in the same manner as in the previous embodiment, and although the oil drain hole 26 above the drain hole 53 is not provided in these two embodiments, the oil drain hole 27 is arranged in the same manner as in the previous embodiment. A hole 26 may also be provided.

Next, the use of the exhaust system of the present invention will be described.

First, when the motor 3 is driven to rotate the Shirotsuko fan 4, steam and smoke containing oil and moisture generated in the kitchen are discharged from the suction port 21 to the fan case 2.
It is sucked into the fan case 2 by centrifugal force, turns along the inner circumferential wall of the fan case 2, reaches the inclined surface 25 of the extension part 23, and is then discharged to the outside of the main body 1 from the exhaust port 22. Oil and water droplets, which have a higher specific gravity than the gas contained in the steam, are separated by centrifugal force, and are carried by the exhaust airflow to the oil drain hole 26 as shown by the arrow in Figure 2, where some of the oil is removed. flows from this oil drain hole 26 to the saucer 5. Here, since the bottom surface of the fan case 2 is formed into an inclined surface 25 and the exhaust port 22 is located above it, light gas is discharged from the exhaust port 22 by forced air flow from the fan, but most of the separated oil is Inlet 2 along slope 25
It is discharged toward the inclined surface 25.
A long oil drain hole 2 is provided on the bottom surface 24 between the
7, the oil flowing along the slope 25 is caught by the oil drain hole 27.
From there, the oil flows into the saucer 5, and finally flows from the drain hole 53 through the drain pipe 51 into the saucer 6, thereby preventing the oil from blowing out from the suction port 21.

According to the inventor's experiments, using the same exhaust fan under the same conditions, experiments were conducted in two cases: when each of the oil drain holes 26, 27, and 28 was provided individually, and when both of the oil drain holes 27 and 28 were provided. The results are as follows.

(1) If the oil drain hole 26 is simply provided, and if atomized liquid is blown into the interior through the suction port of an exhaust fan that is rotating at 20 c.c., the phenomenon of liquid blowing out from the suction port will immediately appear. . Also, adjust the amount of spray
Even when the amount is increased to 300 c.c., there is almost no phenomenon of liquid being drained from the oil drain hole 26, and the phenomenon of liquid blowing out from the suction port is remarkable.

(2) If the oil drain hole 28 is simply provided, and if 150 c.c. of liquid is sprayed into the suction port, a small amount of liquid will be seen around the periphery of the suction port, and most of the liquid will be The liquid is drained from the drain hole 28.

(3) If the oil drain hole 27 is simply provided and 200 c.c. of liquid is sprayed into the suction port, a small amount of liquid will be seen blowing out from the periphery of the suction port. It is not seen much in the following amounts, and most of the liquid is discharged from hole 27 (draining time is slightly slower than in 2), and some liquid remains in the position corresponding to oil drain hole 28. .

(4) When oil drain holes 27 and 28 are provided at the same time, when 200 c.c. of liquid is sprayed into the suction port, no liquid is seen blowing out from the periphery of the suction port. Also, most of the liquid is discharged from the holes 27 and 28. As is clear from the above experiments, according to the present invention, oil and moisture contained in kitchen exhaust such as steam and smoke can be effectively separated and discharged, and the oil and other substances are blown out from the periphery of the inlet and exhausted. It has the advantage of not contaminating the fan or kitchen.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view of the invention, Fig. 2 is a cross-sectional plan view taken along the - line in Fig. 1 after removing the motor and fan, and Fig. 3 is a cross-sectional plan view taken along the - line in Fig.
The figure is an exploded perspective view of a fan case and a saucer according to the same embodiment, and FIGS. 4 and 5 are cross-sectional plan views showing the arrangement of oil drain holes in the fan case and modifications thereof. 1...Main body, 2...Fan case, 3...Motor, 4...Shirozko fan, 5...Saucer, 6...
Receiving bottle, 21... Intake port, 22... Exhaust port, 23...
... Extension part, 24 ... Bottom surface, 25 ... Inclined surface, 2
6, 27, 28...Drain hole, 29...Side wall, 20
...Cylindrical portion, 51...Drain pipe, 53...Drain pipe, 54...Groove portion, 55...Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a kitchen exhaust fan having a spiral fan case with a motor-driven Sirotskov fan inside the main body, a cut line from a cylindrical body part having an inlet at the center lower surface of the fan case. The bottom surface of the end of the extension extending in the direction and having an exhaust port at the upper end is formed into an inclined surface that becomes gradually higher toward the outer end, and at least one fan case is formed on the lower surface of the extension of the tangential fan case at the lower end of this inclined surface. A first oil drain hole is provided between the rear side wall of the fan case and the base end of the inclined surface, and at least one elongated hole is provided between the spiral start end of the cylindrical part of the fan case and the suction port. 1. A kitchen exhaust system, characterized in that a second oil drain hole is provided, and a saucer communicating with the oil drain hole is further provided on the lower surface of the fan case. (2) The kitchen device according to claim 1, wherein the first oil drain hole is formed as a plurality of elongated holes, and the first oil drain hole is formed in a plurality of elongated holes, and is arranged in a straight line or in an inclined manner on the lower surface of the fan case at the lower end of the inclined surface. Exhaust device. (3) The kitchen exhaust system according to claim 1, which is a utility model registration, wherein a drain hole and a drain pipe are provided on the lower surface of the rear end of the saucer, and a receiver is detachably attached to the drain pipe.